KR20030081626A - Phase shifter for controlling electrical beam tilt and dual-band base-station antenna using the same - Google Patents

Abstract

PURPOSE: A phase modulator for controlling an electrical beam tilt and a double band base station antenna using the phase modulator are provided to improve the manual inter modulation distortion characteristics by using a strip transmission line of an air layer and a dielectric load. CONSTITUTION: A power distributing unit(21) distributes an electric wave signal inputted from an outside to both directions so as to have a constant signal strength. First and second strip transmitting lines(22,23) transmit the electric wave signal distributed by the power distributing unit(21) to first and second output terminals. A dielectric plate(24) is provided on a predetermined portion of the first and second strip transmitting lines(22,23) in order to displace the phase of the electric wave signal outputted through the first and second output terminals. A sliding bar(25) moves the dielectric plate(24) on the first and second strip transmitting lines(22,23) within predetermined distances according to an operation of a user.

Description

Phase shifter for controlling electrical beam tilt and dual-band base-station antenna using the same

The present invention relates to a phase shifter for electric beam tilt control and a dual band base station antenna using the same, and in particular, a phase shifter for varying the direction of a vertical radiation beam in a base station antenna of a mobile communication system and the like, using a 800 MHz or 900 MHz band The present invention relates to a base station antenna capable of simultaneously relaying dual and 1800 MHz, 1900 MHz, or 2000 MHz bands.

In domestic and overseas mobile communication systems, the density of subscribers varies according to regions and time zones, so that network management is performed to adjust base station coverage by adjusting the vertical beam angle of base station antennas in order to provide optimal service.

Currently, most of the wireless communication systems such as PCS, cellular, GSM, and wireless securities services in Korea are using a mechanical tilt method. The mechanical tilt method is a method of directly changing the direction of an antenna radiation beam by adjusting the angle of the antenna using a mechanical tilt device mounted to the antenna.

If the antenna beam tilt variable method is used, the antenna can be made relatively inexpensive, but for the base station operation, the technician goes directly to the base station antenna tower, loosens several bolts fixing the tilt mechanism, and changes the antenna angle. Since it is necessary to go through a complicated process of tightening the bolts again, it is dangerous to fall and it takes a lot of time to reduce the speed of repair, and it is very expensive to maintain the base station operation due to the labor cost of hiring or using a technician to adjust the antenna tilt. There was a lot of problems.

In order to solve this problem, an electric beam tilt method for remotely adjusting the beam tilt of the base station antenna has been developed. The electric beam tilt device adjusts the beam tilt of the base station antenna according to a user's instruction to be transmitted remotely. For this purpose, the electric beam tilt device includes a phase shifter for displacing the beam phase.

On the other hand, the antennas installed in the base station are capable of transmitting and receiving radio frequency to a predetermined sector, so that when using spatial diversity using a single polarization antenna in one base station, about 9 large antennas are used. In the case of using polarization diversity using a dual polarization antenna, three large antennas are installed, and a plurality of small antennas are mounted inside the large antenna.

That is, the electrical beam tilt device is installed inside the large antenna to adjust the beam tilt of the plurality of small antennas, wherein the phase shifter phase of the plurality of small antennas according to a user's instruction to be transmitted remotely To displace it. To this end, conventionally, the one phase variable has been able to adjust only the one small antenna.

Accordingly, when eight small antennas are mounted in the large antenna, eight phase shifters are also mounted in the electric beam tilt device provided in the large antenna.

Next, a conventional electric beam tilt apparatus for adjusting a beam tilt of a base station antenna by varying a phase of a radio frequency signal relayed in a mobile communication system according to a user's instruction will be described with reference to FIG. 1A.

As shown in FIG. 1A, a conventional electric beam tilt apparatus includes a remote controller 11 for remotely controlling a beam tilt, and small antennas 120a to 120n arranged inside a large antenna installed at a base station. The phase shifter 13 changes the phase of the input radio frequency signal according to the user's instructions and transmits the phase shifters 13 to the small antennas 120a through 120n, and the user's instructions are wirelessly or wired from the remote controller 11. And a step motor 14 which adjusts the phase variable value of the phase variabler 13 accordingly.

Phase shifter 13 is a device for adjusting the length of the "n" transmission lines respectively connected to the small antenna (120a to 120n) to the constant difference by the θ magnification by using a gear device, a method of turning the gear device It can be implemented as follows. Is the phase difference between the small antennas 120a to 120n.

First, the step motor 14, which is controlled by the remote controller 11 by wireless or wired, may be mounted, and the remote controller 11 may be installed at a location where the ground or base station equipment is located for remote control.

Secondly, a wireless transceiver may be mounted together with the step motor 14 to remotely control the apparatus.

Third, by using a knob for adjusting the tilt angle outside the large antenna without using the step motor 14, the user can directly adjust the beam tilt by turning the knob. Here, the large antenna is an antenna mounted on the base station, and includes the electric beam tilt device of FIG. 1A and the small antennas 120a to 120n.

The first and second remote control schemes are the final goal of attempting electrical beam tilt.

The third method is a method in which a user directly climbs a base station tower and adjusts a beam tilt, and controls only a knob without touching an antenna mounting apparatus.

When the user adjusts the step motor 14 by the remote controller 11 to move the transmission line of the phase shifter 13 by a predetermined angle, the phase of the radio frequency signals supplied to the small antennas 120a to 120n is constant. The phase difference is varied at the magnification.

For example, as shown in FIG. 1B, when the phase difference θ between antennas is supplied, the equiphase propagation surface is tilted at an angle θτ. Here, the phase difference θ is expressed as follows (Equation 1).

θ = β * d * sinθτ = (2π / λ) d * sinθτ

In Equation (1), β is a space propagation constant as Equation (2) below, λ is a wavelength in air, and d is a distance between antennas.

β = 2π / λ

However, in the case of the conventional electric beam tilt apparatus as described above, since the conventional phase variable as described above is attached to each base station antenna, the manufacturing cost of the base station antenna is high, and the occupied area of the product is so large that it is commercially available. In order to compensate for this, even if the phase shifter is miniaturized, the available power decreases and the intermodulation distortion (IMD) increases, thereby making the base station antenna unsuitable.

In recent years, there are many cases in which an existing mobile communication service provider that services a 800 MHz or 900 MHz band additionally acquires a service business right of 1800 MHz, 1900 MHz, or 3G band. However, even though there are antennas and base stations already in use, the operator has to increase the number of new antennas and base stations for additional allocated service bands, which leads to related land purchase, lease, licensing, environmental pollution and radio wave pollution. There are many problems that need to be solved.

Accordingly, the present invention has been made to solve the above problems, by implementing the transmission line as an air layer strip transmission line without physical friction and almost no loss, and by implementing a dielectric load floating in the air between the strip transmission line, all transmission lines The purpose of the present invention is to provide a phase shifter capable of minimizing passive intermodulation because there is no junction between dissimilar metals, which is a major cause of passive intermodulation signal generation.

The present invention implements a dielectric load strip transmission line by inserting a dielectric load only in a portion where a phase difference between radiating elements needs to be implemented, thereby providing a phase shifter which greatly reduces the feeding loss of the array and enables the antenna to transmit at high power. The purpose is.

SUMMARY OF THE INVENTION An object of the present invention is to provide a phase shifter that can be implemented in a multi-layer substrate form such as an air layer strip transmission line and a dielectric load strip transmission line to significantly reduce the physical thickness and footprint of a product.

The present invention provides a phase shifter capable of easily realizing the continuous beam tilt angle by simultaneously implementing all the phase differences required for the beam tilt of the array radiation element in one sliding structure and causing the phase differences for the beam tilt to be continuously generated. The purpose is.

SUMMARY OF THE INVENTION An object of the present invention is to provide a base station antenna capable of high output transmission with low array feeding loss by adjusting the electrical beam tilt of the antenna using the phase shifter as described above.

An object of the present invention is to provide an antenna using a phase shifter having a small physical thickness and a small footprint, thereby providing a base station antenna having a small thickness and a small footprint while simultaneously accommodating a high band and a low band frequency.

The present invention implements the above-described power supply between the phase shifter and the radiating element in a parallel feeding manner so that phase matching is performed in phase without the transmission path difference from the radio frequency signal input to all the array radiating elements, so that cables of different lengths are not used. It is an object of the present invention to provide a base station antenna capable of connecting a phase shifter and an array radiation element by a cable having the same length.

1A is a block diagram of a conventional electric beam tilt apparatus.

1B is an explanatory diagram of a state of use of a conventional electric beam tilt apparatus.

Figure 2a is a block diagram of a phase shifter of the base station antenna for adjusting the electrical beam tilt in accordance with an embodiment of the present invention.

2B is an illustration of the use of the phase shifter in FIG. 2A.

3A and 3B are cross-sectional structural views of the phase shifter in FIG. 2A.

4A and 4B are explanatory views for explaining a state of use of the phase shifter in Fig. 2A.

Figure 5a is a block diagram of a phase shifter of the base station antenna for adjusting the electrical beam tilt in accordance with another embodiment of the present invention.

5B is an illustration of the use of the phase shifter in FIG. 5A.

Figure 6a is a block diagram of a phase shifter of the base station antenna for adjusting the electrical beam tilt in accordance with another embodiment of the present invention.

6B is an illustration of the use of the phase shifter in FIG. 6A.

7 is a front perspective view of a dual band base station antenna using a phase shifter according to an embodiment of the present invention.

8A and 8D are front perspective views of the first dipole radiation element in FIG.

8B and 8F are front perspective views of the second dipole radiation element in FIG.

FIG. 8C is a front perspective view of the third dipole radiation element in FIG. 7; FIG.

8E is a front perspective view of the beam width adjusting member in FIGS. 7 and 8F.

Explanation of symbols on the main parts of the drawings

21: power distribution section 22, 23: strip transmission line

24: dielectric plate 25: sliding bar

26 to 29: first to fourth grooves 31: dielectric substrate

32, 33: first and second ground copper plates 34, 36: cable

35, 37: antenna

The present invention for achieving the above object is, in the phase shifter for adjusting the electric beam tilt of the base station antenna in the mobile communication system, the power for distributing the radio signal input from the outside in both directions with a constant signal intensity Distribution unit; First and second strip transmission lines for transmitting the radio wave signal distributed by the power distribution unit to first and second output terminals, respectively; A dielectric plate disposed on a predetermined portion of the first and second strip transmission lines so as to shift left and right on the first and second strip transmission lines and shift a phase of a radio signal output through the first and second output terminals; And a sliding bar for moving the dielectric plates on the first and second strip transmission lines from side to side within a predetermined distance according to a user's manipulation.

The present invention provides a phase shifter for adjusting electric beam tilt of a base station antenna in a mobile communication system, the phase shifter comprising: a first phase shifter configured to transmit a radio signal input from the outside in a uniformly bidirectional manner; A second phase shift unit for distributing the signal output from the first phase shift unit in both directions with constant intensity and transmitting the signal to the first and second output terminals; And a third phase shift unit for distributing the signal output from the first phase shift unit in both directions with constant intensity, and transmitting the signal to the third and fourth output terminals.

The present invention provides a phase shifter for adjusting electric beam tilt of a base station antenna in a mobile communication system, the phase shifter comprising: a first phase shifter configured to transmit a radio signal input from the outside in a uniformly bidirectional manner; Second and third phase shifters for distributing and transmitting signals output from the first phase shifter in a constant bidirectional direction; A fourth phase shifter for distributing the signal output from the second phase shifter in both directions with constant intensity and transmitting the signal to the first and second output terminals; A fifth phase shifter for distributing the signal output from the second phase shifter in both directions with constant intensity to be transmitted to the third and fourth output terminals; A sixth phase shifter for distributing the signal output from the third phase shifter in both directions with a constant intensity to transmit to the fifth and sixth output terminals; And a seventh phase shift unit for distributing the signal output from the third phase shift unit in both directions with constant intensity to be transmitted to the seventh and eighth output terminals.

A base station antenna using a phase shifter for electric beam tilt, the base station antenna comprising: a first dipole radiation element for copying a low band frequency signal electrically beam tilted and fed by the phase shifter; And a second dipole radiating element for radiating a high band frequency signal electrically fed by the phase shifter and supplied with power, wherein the first dipole radiating element is spaced apart from the second dipole radiating element. It is characterized by.

A base station antenna using a phase shifter for electric beam tilt, the base station antenna comprising: at least one first dipole radiation element for radiating a low band frequency signal electrically fed and tilted by the phase shifter; At least one second dipole radiation element for radiating a high band frequency signal electrically beam tilted and fed by the phase shifter; And at least one third dipole radiating element for simultaneously copying the low band and the high band frequency signals electrically beam tilted and fed by the phase shifter, wherein the at least one first to third dipole radiating element Characterized in that arranged in an irregular order.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

2A is a configuration diagram of a phase shifter of a base station antenna for electric beam tilt adjustment according to an embodiment of the present invention, and illustrates a phase shifter for shifting the phase arrangement of the base station antenna to 1: 2.

As shown in FIG. 2A, a phase shifter according to an embodiment of the present invention includes a power distribution unit 21 and a power distribution unit 21 for distributing a radio wave signal input from the outside in both directions with a constant signal intensity. Strip transmission lines 22 and 23 for transmitting the radio wave signal distributed by the < Desc / Clms Page number 5 > to the output terminal P1 and output terminal P2, respectively, and are moved left and right on the strip transmission lines 22 and 23 by a user's operation. In order to shift the phase of the radio wave signal output through P1 and P2, the dielectric plate 24 disposed at a predetermined portion of the strip transmission lines 22 and 23, and on the strip transmission lines 22 and 23 according to the user's operation. A sliding bar 25 is provided to move the dielectric plate 24 from side to side within a predetermined distance.

The strip transmission lines 22 and 23 are air strip transmission lines formed in the air layer between two spaced ground plates (not shown).

The strip transmission lines 22 and 23 are formed in the same cross-sectional structure, and in the absence of the dielectric plate 24, the strip transmission lines 22 and 23 are formed in the cross-sectional structure as shown in FIG. 3A.

Referring to FIG. 3A, the cross-sectional structure of the strip transmission line 22 is described as an example. First and second spaced apart at regular intervals h1 and h2 are disposed above and below the strip transmission line 22 formed on the dielectric substrate 31. In the air layer between the two ground copper plates 31 and 32, a strip transmission line 22 is formed by an etching technique. Here, the input impedance Z ₀ 50Ω is determined by the intervals h1 and h2 between the strip transmission line 22 and the first and second ground copper plates 31 and 32. Accordingly, the strip transmission lines 22 and 23 have propagation constants. Is determined as the only solution, which can be easily calculated using numerical techniques.

The dielectric plate 24 is disposed in common on the a1 and a2 sections of the strip transmission line 22 and the b1 and b2 sections of the strip transmission line 23, and the same size so that a predetermined portion of the strip transmission lines 22 and 23 is respectively exposed. The first and second grooves 26 and 27 are formed to be spaced apart. These first and second grooves 26 and 27 have a low pass filtering effect when the radio signal is transmitted through the strip transmission lines 22 and 23, thereby preventing the input impedance from being lowered by the dielectric plate 24. It also plays a role of matching input impedance.

When the dielectric plate 24 is formed on the strip transmission lines 22 and 23, it has a cross-sectional structure as shown in FIG. 3B. Since the strip transmission lines 22 and 23 have the same cross-sectional structure, the cross-sectional structure of the dielectric plate 24 formed on the strip transmission line 22 will be described below with reference to FIG. 3B.

As shown in FIG. 3B, the dielectric plate 24 is symmetrically spaced apart at regular intervals above and below the strip transmission line 22, and the strip transmission line 22 and the first and second ground copper plates 31 and 32 are formed. It is formed spaced apart at regular intervals between them.

As such, when a dielectric load having a dielectric constant ε ^r (ε ^r > 1) greater than '1' is inserted between the air layer strip transmission lines 22 and 23 and the first and second ground copper plates 32 and 33, the wavelength shortening effect is achieved. The propagation constant β _g becomes larger as shown in Equation 3 below, and the wave propagation speed v _g becomes slower as shown in Equation 4 below.

β _g = (ε _reff ) ^1/2 * β ₀

v _g = v ₀ / (ε _reff ) ^1/2

[Equation 3] and [Equation 4], ε _reff represents the effective dielectric constant in the dielectric load transmission line. Therefore, the phase transfer is delayed as compared with passing the air strip strip transmission line section of the same length.

The sliding bar 25 is mechanically attached to one end of the dielectric plate 24, and the first and second grooves 26 having a predetermined size are attached to the portion where the dielectric plate 24 and the sliding bar 25 are attached. 27) are formed spaced apart. The third and fourth grooves 28 and 29 are for sliding the slide bar 25 to the left and right, and have the same length. Accordingly, the sliding bar 25 is slid by the length of the maximum third and fourth grooves (28, 29).

In this way, the sliding bar 25 attached to the dielectric plate 24 is slid left and right through the third and fourth grooves 28 and 29 according to the mechanical operation by the user, so that the dielectric plate 24 causes the strip transmission line ( 22, 23 will be moved to the left and right in a certain section.

Meanwhile, the radio wave signal output through the output terminal P1 of the strip transmission line 22 is transmitted to the antenna 35 through the cable 34, and the radio wave signal output through the output terminal P2 of the strip transmission line 23 is The cable 36 is transmitted to the antenna 37.

An operation of the phase shifter according to the embodiment of the present invention having the structure as described above will be described in detail with reference to FIGS. 2B, 3A, 3B, 4A, and 4B.

The electric signal input from the outside is distributed by the power distribution unit 21, the intensity of the signal is transmitted to the output terminal P1 through the strip transmission line 22, and then transmitted to the antenna 35 through the cable 34 again. In addition, the other signal distributed to the power distribution unit 21 is transmitted to the output terminal P2 through the strip transmission line 23 and then transmitted to the antenna 37 via the cable 36 again.

At this time, the propagation constant β _g is the same as in [Equation 3], and the wave propagation speed v _g is the same as in [Equation 4].

The phase shifter shown in FIG. 2A shows a state where there is no movement of the sliding bar 25, wherein an air layer section and a dielectric between sections a1 and a2 of the strip transmission line 22 and sections b1 and b2 of the strip transmission line 23 are shown. Since the air strip transmission path in the section where the plate 24 is located is completely symmetrical as in FIG. 4A, the phase difference of the radio signal transmitted through the output terminals P1 and P2 is "0".

Thus, when the radio signals output through the output terminals P1 and P2 without phase difference are connected to the antennas 35 and 37 through the cables 34 and 36 of the same length, respectively, the electrical equiphase surfaces of the antennas 35 and 37 Is the same as the physical apertures of the antennas 35 and 37 so that the transmission direction is a horizontal direction perpendicular to the apertures of the antennas 35 and 37.

Here, the antennas 35 and 37 do not lose their generality because they only need to be multiplied by the element pattern for the phased array radiation pattern. And, the array spacing between the antennas 35 and 37 ( ) Is usually about 0.7 to 0.9 lambda. Is the free-space wavelength.

If, the user distances the sliding bar 25 in one direction through mechanical manipulation When sliding by as much, as shown in FIG. 2B, the dielectric plate 24 is moved in the direction of movement of the sliding bar 25. As much as possible, which causes the strip transmission line 22 to Air strip strip transmission line with Increases as much as Dielectric load strip transmission line section (a3 and a4 section in FIG. 2B) is " ", The transmission interval as shown in Figure 4b is formed.

In contrast, the strip transmission line 23 has an air layer strip transmission line section as shown in FIGS. 2B and 4B. "And reduce the dielectric load strip transmission interval" Increases as much.

Accordingly, when the phases of the output terminals P1 and P2 in FIG. 2A are set to "0", FIG. 2B shows the output terminal (D) by the difference Δβ of the propagation constant due to the absence of a dielectric load on the strip transmission lines 22 and 23. The phases at P1 and P2) become Δθ and −Δθ, respectively, to have a difference of 2Δθ in total. Here, Δβ, Δθ and 2Δθ are as shown in Equations 5 to 7, respectively.

Δβ = β ₀ -β _g

In addition, when connected to the antennas 35 and 37 through the equi-phase cables 34 and 36, the base station antenna opening surface H1 is H2 in the electrical equi-phase wavefront in a mechanically standing state, as shown in FIG. 2B. to change a direction perpendicular to H3, i.e. it can be tilted down to ₀ θ direction from the horizontal direction. This is due to the physical phenomenon that the propagation speed of the dielectric load strip transmission line is slowed proportionally by the propagation constant compared to the air layer strip transmission line. However, θ ₀ is as shown in Equation 8 below.

Here, the impedance on the transmission path from the outside to the antennas 35 and 37 through the power distribution unit 21 is designed to be 50Ω with respect to the air strip transmission line, but a1 and In a transmission path such as a2 section or b1 and b2 section of the strip transmission line 23, the impedance varies depending on the dielectric load so that the sliding bar 25 is separated. When moving by, an unwanted reflected wave may occur at the input side of the strip transmission line 22 to the a1 and a2 intervals or at the input side of the strip transmission line 23 to the b1 and b2 intervals and this reflected wave is desired at the antennas 35 and 37. And the phase difference of -Δθ.

To prevent this, the line widths of the strip transmission lines 22 and 23 and the first and second ground copper plates 32 and 33 and the strip transmission lines 22 and 23 and the first and second ground as shown in FIGS. 3A and 3B. It is necessary to adjust the intervals h1 and h2 of the copper plates 32 and 33 well. When these parameters are properly selected, as shown in FIG. 4A, the dielectric plate 24 located in the sections a1 and a2 of the strip transmission line 22 in FIG. 2A is a certain distance in one direction. 2b is positioned at sections a3 and a4 of the strip transmission line 22 in FIG. 2b, and one side of the dielectric plate 24 is positioned at sections a1 and a2 of the strip transmission line 23 in FIG. 2a as shown in FIG. Distance in the direction Even if it is shifted by and is located in the b3 and b4 sections of the strip transmission line 23 in FIG. 2B, even if the impedance is changed within a predetermined size by the dielectric plate 24 due to the low pass filtering effect, the wave is normally within the desired frequency band. I can pass it.

FIG. 5A is an enlarged configuration of a phase shifter of a base station antenna for electric beam tilt adjustment in FIG. 2A, and illustrates a phase shifter for shifting a phase array of a base station antenna to 1: 4. will be.

As illustrated in FIG. 5A, a phase shifter according to another embodiment of the present invention may include a first phase shifter configured to output a signal having a phase of 2Δθ by distributing a radio signal input from the outside in both directions with a constant intensity of the signal ( 51 and a second phase shifter for outputting a signal having a phase Δθ to output terminals P3 and P4 by dividing a signal having a phase of 2Δθ outputted from the first phase shifter 51 in both directions in a constant manner. 52 and a third phase shifter for outputting a signal having a phase of Δθ to output terminals P5 and P6 by distributing a signal having a phase of 2Δθ outputted in both directions in a constant direction in both directions. 53).

The first to third phase shifters 51 to 53 each have the same structure and function as the phase shifter according to the embodiment of the present invention in FIG. 2A.

The first phase shifter 51 may include a power distributor 54 for distributing an input signal, and a second and third phase shifter 52 for transmitting radio signals distributed by the power distributor 54, respectively. 53 to shift the phases of the radio wave signals transmitted to the second and third phase shifters 52 and 53, which are moved left and right on the strip transmission lines 55 and 56 for transmission to the 53 and the strip transmission lines 55 and 56, respectively. To this end, a dielectric plate 57 disposed on a portion of the strip transmission lines 55 and 56 and a sliding bar 58 for moving the dielectric plate 57 on the strip transmission lines 55 and 56 from side to side within a predetermined distance are provided. Equipped.

The second phase shift unit 52 outputs a power distribution unit 59 for distributing a signal input from the first phase shift unit 51 and a radio wave signal distributed by the power distribution unit 59, respectively. Strip transmission lines 60 and 61 for transmission to P3 and P4, and strip transmission line 60 to shift phases of radio signals transmitted left and right on the strip transmission lines 60 and 61 and transmitted to output terminals P3 and P4. And a dielectric plate 62 disposed at a predetermined portion on the 61 and a sliding bar 58 for moving the dielectric plate 62 on the strip transmission lines 60 and 61 from side to side within a predetermined distance.

The third phase shift unit 53 outputs a power distribution unit 63 for distributing a signal input from the first phase shift unit 51 and a radio wave signal distributed by the power distribution unit 63, respectively. Strip transmission lines 64 and 65 for transmission to P5 and P6, and strip transmission lines 64 to shift the phase of radio signals transmitted left and right on strip transmission lines 64 and 65 and transmitted to output terminals P5 and P6. And a dielectric plate 66 disposed at a predetermined portion on the 65, and a sliding bar 58 for moving the dielectric plates 66 on the strip transmission lines 64 and 65 from side to side within a predetermined distance.

The sliding bar 58 is formed to have the same structure and function as in FIG. 2A, and is commonly connected to one end of the dielectric plates 57, 62, and 66. Accordingly, the dielectric plates 57, 62, 66 are simultaneously moved by the sliding bar 58.

Grooves as in FIG. 2A are formed on the sliding bar 58 and the dielectric plates 57, 62, 66.

In addition, the lengths of the strip transmission lines 55 and 56 where the dielectric plate 57 is positioned in the first phase delay unit 51 are the strip transmission lines 60 where the dielectric plate 62 is positioned in the second phase delay unit 52. , 61 and the third phase delay unit 53 are formed to be twice as long as the length of the strip transmission lines 64 and 65 where the dielectric plate 66 is located. This is for the signal output from the first phase shifter 51 to have a higher phase than the signals output from the second and third phase shifters 52 and 53.

On the other hand, the output terminals P3 to P6 are connected to the antennas 71 to 74 via cables 67 to 70, respectively.

5A shows a state in which the sliding bar 58 is not moved, and in this state, the strip transmission lines 55, 60, and 64 are symmetrical with the strip transmission lines 56, 61, and 65, respectively. The beam is radiated in the horizontal direction. Here, the arrangement interval d between the antennas 71 to 74 is usually about 0.7 to 0.9 lambda.

5B shows that the dielectric plates 57, 62, 66 disposed on the first inner third phase shift portions 51 to 53 by the sliding bar 58, respectively, have a certain distance. As long as it is moved in one direction. At this time, the output sides c1 and c2 of the first phase shifter 51 have a phase difference of 2Δθ and −2Δθ, respectively. In addition, the output stages P3 and P4 of the second phase shifter 52 have a phase difference between Δθ and -Δθ, and the output stages P5 and P6 of the second phase shifter 53 also have a difference of Δθ and -Δθ. Has a phase difference.

Accordingly, as shown in the drawings, linear phase differences of + 3Δθ, + Δθ, -Δθ, and -3Δθ occur at the output terminals P3 to P6 and the output terminals P3 to P6 through the same length cables 67 to 70. each antenna is connected (71-74) to are copied in the direction θ ₀ down tilt (tilt down) in the horizontal direction.

Herein, the power distributions of the power distribution units 51 to 53 are 1: 1, 1: 2, and 2: 1, respectively, and the intensity of the electric field applied to the antennas 71 to 74 is 1: 2: 2: 1. You can adjust the degree. Therefore, the vertical left and right primary side lobes of the down tilt beam can be improved by about -15 dB, compared to -13 dB of a uniform distribution of 1: 1: 1: 1.

FIG. 6A is an enlarged configuration of a phase shifter of a base station antenna for electric beam tilt adjustment according to the present invention in FIGS. 2A and 5A, and illustrates a phase shifter for shifting a phase array of a base station antenna to 1: 8. will be.

As shown in Figure 6a, a phase shifter according to another embodiment of the present invention, the first phase shifter for outputting a signal having a phase of 4Δθ by distributing a radio signal input from the outside in both directions with a constant intensity of the signal (81) and second and third phase shifters 82, 83 for distributing a signal having a phase of 4Δθ outputted from the first phase shifter 81 in both directions in a constant manner to output a signal having a phase of 2Δθ. ) And a fourth phase shifter 84 that outputs a signal having a phase Δθ to output terminals P7 and P8 by dividing a signal having a phase of 2Δθ outputted from the second phase shifter 82 in both directions in a constant manner. ) And a fifth phase shifter 85 that outputs a signal having a phase Δθ to the output terminals P9 and P10 by dividing a signal having a phase of 2Δθ outputted from the second phase shifter 82 in both directions in a constant manner. ) And the output from the third phase shifter 83 The phase output from the 6th phase shift part 86 and the 3rd phase shift part 83 which distribute this signal of 2 (DELTA) (theta) uniformly in both directions, and output the signal of phase (DELTA) (theta) to the output stage P11, P12. And a seventh phase shifter 87 for distributing the signal having a constant of 2Δθ in both directions to output the signal having a phase of Δθ to the output terminals P13 and P14.

The first to seventh phase shifters 81 to 87 each have the same structure and function as the phase shifter according to the embodiment of the present invention in FIG. 2A.

The first phase shifter 81 may include a power distributor 88 for distributing an input signal and a radio wave signal distributed by the power distributor 88. To shift the phases of the radio wave signals transmitted to the second and third phase shifters 82 and 83 by being moved left and right on the strip transmission lines 89 and 90 for transmission to the third transmission line 83 and 90. To this end, a dielectric plate 91 disposed at a portion of the strip transmission lines 89 and 90 and a sliding bar 92 for moving the dielectric plate 91 on the strip transmission lines 89 and 90 from side to side within a predetermined distance. Equipped.

The second phase shifter 82 supplies a power distribution unit 93 for distributing a signal input from the first phase shifter 81 and a radio wave signal distributed by the power distribution unit 93 to the fourth, respectively. And strip transmission lines 94 and 95 for transmission to the fifth phase shifters 84 and 85 and left and right on the strip transmission lines 94 and 95 to the fourth and fifth phase shifters 84 and 85. In order to shift the phase of the transmitted radio signal, the dielectric plate 96 disposed on a portion of the strip transmission lines 94 and 95 and the dielectric plate 96 on the strip transmission lines 94 and 95 are moved to the left and right within a predetermined distance. A sliding bar 92 for moving is provided.

The third phase shifter 83 is configured to distribute the signal inputted from the first phase shifter 81 to the power distributor 97 and the radio signal distributed by the power distributor 97 to the sixth, respectively. And strip transmission lines 98 and 99 for transmitting to the seventh phase shifters 86 and 87 and left and right on the strip transmission lines 98 and 99 to the sixth and seventh phase shifters 86 and 87. In order to shift the phase of the transmitted radio signal, the dielectric plate 101 disposed on a portion of the strip transmission lines 98 and 99 and the dielectric plate 101 on the strip transmission lines 98 and 99 are horizontally moved from side to side. A sliding bar 92 for moving is provided.

The fourth phase shifter 84 outputs a power distribution unit 102 for distributing a signal input from the second phase shifter 82 and an electric wave signal distributed by the power distributor 102, respectively. Strip transmission lines 103 and 104 for transmission to P7 and P8, and strip transmission lines 103 for shifting the phase of the radio signal transmitted to the output terminals P7 and P8 by moving left and right on the strip transmission lines 103 and 104. And a dielectric plate 105 disposed at a predetermined portion on the 104 and a sliding bar 92 for moving the dielectric plate 105 on the strip transmission lines 103 and 104 from side to side within a predetermined distance.

The fifth phase shifter 84 outputs a power distribution unit 106 for distributing a signal input from the second phase shifter 82 and a radio wave signal distributed by the power distribution unit 106, respectively. Strip transmission lines 107 and 108 for transmission to P9 and P10, and strip transmission lines 107 to shift the phase of radio signals transmitted left and right on the strip transmission lines 107 and 108 and transmitted to output terminals P9 and P10. And a dielectric plate 109 disposed at a predetermined portion on the 108 and a sliding bar 92 for moving the dielectric plates 109 on the strip transmission lines 107 and 108 from side to side within a predetermined distance.

The sixth phase shift unit 86 outputs a power distribution unit 110 for distributing a signal input from the third phase shift unit 83 and a radio wave signal distributed by the power distribution unit 110, respectively. Strip transmission lines 111 and 112 for transmission to P11 and P12, and strip transmission lines 111 to shift phases of radio signals transmitted left and right on the strip transmission lines 111 and 112 and transmitted to output terminals P11 and P12. And a dielectric plate 113 disposed at a predetermined portion on the 112 and a sliding bar 92 for moving the dielectric plates 113 on the strip transmission lines 111 and 112 from side to side within a predetermined distance.

The seventh phase shift unit 87 outputs a power distribution unit 114 for distributing a signal input from the third phase shift unit 83 and a radio wave signal distributed by the power distribution unit 114, respectively. Strip transmission lines 115 and 116 for transmission to P3 and P14, and strip transmission lines 115 to shift phases of radio signals transmitted left and right on the strip transmission lines 115 and 116 and transmitted to output terminals P3 and P14. And a dielectric bar 117 disposed at a predetermined portion on the 116 and a sliding bar 92 for moving the dielectric plate 117 on the strip transmission lines 115 and 116 from side to side within a predetermined distance.

The sliding bar 92 is formed to have a structure and a function as shown in FIG. 2A and commonly connected to one end of the dielectric plates 91, 96, 101, 105, 109, 113, and 117. Accordingly, the dielectric plates 91, 96, 101, 105, 109, 113, and 117 are simultaneously moved by the sliding bar 92.

Grooves as in FIG. 2A are formed on the sliding bar 92 and the dielectric plates 91, 96, 101, 105, 109, 113, and 117.

The length of the strip transmission lines 89 and 90 where the dielectric plate 91 is located in the first phase delay unit 81 is the strip transmission line 94 and 95 where the dielectric plate 96 is located in the second phase delay unit 82. ) And the third phase delay unit 83 are formed to be twice as long as the lengths of the strip transmission lines 98 and 99 on which the dielectric plate 101 is located. This is for the signal output from the first phase shifter 81 to have a higher phase than the signals output from the second and third phase shifters 82 and 83.

In addition, the lengths of the strip transmission lines 94 and 95 where the dielectric plate 96 is positioned in the second phase delay unit 82 are the strip transmission lines 103 where the dielectric plate 105 is positioned in the fourth phase delay unit 84. , 104 and the fifth phase delay unit 85 are formed to be twice as long as the lengths of the strip transmission lines 107 and 108 in which the dielectric plate 109 is located. This is for the signal output from the second phase shifter 82 to have a higher phase than the signals output from the fourth and fifth phase shifters 84 and 85.

In addition, the lengths of the strip transmission lines 98 and 99 where the dielectric plate 101 is positioned in the third phase delay unit 83 are the strip transmission lines 111 where the dielectric plate 113 is positioned in the sixth phase delay unit 86. , 112 and the seventh phase delay unit 87 are formed to be twice as long as the lengths of the strip transmission lines 115 and 116 on which the dielectric plate 117 is located. This is for the signal output from the third phase shifter 83 to have a higher phase than the signals output from the sixth and seventh phase shifters 86 and 87.

On the other hand, the output terminals P7 to P14 are connected to the antennas 126 to 133 through cables 118 to 125, respectively.

6A is a state in which the sliding bar 58 is not moved, and in this state, since the strip transmission lines in the first to seventh phase shift parts 81 to 87 are symmetrical with each other, the phase angle is supplied so that the tilt angle is' 0. 'In beam is radiated in the horizontal direction. Here, the arrangement interval d between the antennas 126 to 133 is usually about 0.7 to 0.9 lambda.

FIG. 6B shows that the dielectric plates 91, 96, 101, 105, 109, 113, and 117 respectively disposed on the first inner seventh phase shift portions 81 to 87 by the sliding bar 92 have a predetermined distance. As long as it is moved in one direction.

A phase difference of 4Δθ and -4Δθ is generated at two output sides of the first phase shift unit 81, and a phase difference of 2Δθ and -2Δθ is generated at the two output sides of the second and third phase shift units 82 and 83, respectively. Therefore, phase differences of Δθ and -Δθ are generated on the two output sides of the fourth to seventh phase shift parts 84 to 87, respectively.

Therefore, as shown in the drawings, the dielectric plates 91, 96, 101, 105, 109, 113, and 117 have a certain distance. When moved by, the electric field phases of the antennas 127 to 134 become + 7Δθ, + 5Δθ, + 3Δθ, + Δθ, -Δθ, -3Δθ, -5Δ, and -7Δθ, respectively. As a result, the phase difference between adjacent antennas among the antennas 126 to 133 becomes 2Δθ, which causes radiation in the down tilted direction by θ ₀ with respect to the horizontal direction as described above.

Comparing the difference between the phase shifter of the 1: 2 phased array antenna in FIG. 2A, the phase shifter of the 1: 4 phased array antenna in FIG. 5A, and the phase shifter of the 1: 8 phased array antenna in FIG. 6A. Since the number of arrangements of the phase shifter of the present invention is increased by 2 times, the antenna gain increases by 2 times, that is, the vertical beam width decreases by 2 times. However, the down tilt direction is the same and the beam tilt method is the same.

Meanwhile, in the phase shifter of the present invention as described above, the intensity of the electric field applied to the array antenna element may be adjusted by varying the impedance ratio between the paths of the power distribution unit.

For example, if the power distribution ratios of the power distribution units 88, 93, 99, 102, 106, 110, and 114 are appropriately set in the phase shifter of the 1: 8 phased array antenna of FIG. 6A, the array antenna as a whole is "x: It can be fed with an intensity pattern of x: x: x: x: x: x: x ", thereby improving the side lobe level of the vertical radiation pattern of the down tilt beam to about -17 dB.

In practice, many efforts have been made to reduce the primary side lobe adjacent to the main lobe of the vertical radiation pattern in the base station antenna of the mobile communication system to reduce the interference between adjacent cells. However, when the operating frequency bandwidth is wide, such as a base station antenna, an amplitude and phase transfer error of a power distribution unit consisting of a strip transmission line or a micro strip transmission line occurs. In particular, as the power distribution ratio increases, impedance mismatch occurs due to complex electromagnetic interaction with the dielectric load of the phase shifter, so that the designed side lobe level is often difficult to obtain.

However, the phase shifter of the present invention has a low pass filtering effect as described above, and thus has an effect of isolating the interaction between the power distribution element and the phase shift element. Therefore, the phase shifter of the present invention can be easily implemented independently as well as the electric beam tilt low side lobe level.

In addition, since the phase shifter of the present invention is implemented as an air layer strip transmission line without physical friction between dissimilar metals on the transmission path, the dielectric load section for phase shift is also implemented so that the air layer strip transmission line and the dielectric plate are spaced at regular intervals. Accordingly, the present invention is characterized by the fact that it is possible to minimize the generation of the intermodulation signal because there is no heterometal junction region, which is the largest cause of the passive intermodulation signal generation on all transmission lines, and the 43 dBm two-tone continuous wave input Up to -150dBm is possible.

In addition, the present invention is implemented by integrating the power distribution element and the phase shift element on the same substrate physically by a multilayer substrate method, so that the low-cost electrical cross-linking characteristics of the low side lobe level as a whole excellent and low-cost electrical The tilt antenna can be implemented.

Next, the dual band base station antenna according to the present invention implemented by using the phase shifter of the present invention having the above-mentioned characteristics will be described with reference to FIG. 7.

FIG. 7 is a front perspective view of a dual band base station antenna using a phase shifter according to an embodiment of the present invention, in which a plurality of first and second dipole radiating elements 710 and 720 accommodate a single band radio signal; FIG. And a plurality of third dipole radiation elements 730 for receiving a radio signal of a dual band are arranged in a line.

In addition, the base station antenna of the present invention, '4' radio frequency (RF) connector 750 connected to an external communication device for receiving a radio frequency signal, and a sliding knob for adjusting the angle of down tilt per band (not shown) No).

The plurality of first dipole radiating elements 710 radiate an electric wave signal of 800 MHz or 900 MHz low band which is electrically beam tilted and fed by the phase shifter of the present invention described above.

The plurality of second dipole radiating elements 720 radiates a radio wave signal of 1800 MHz, 1900 MHz, or 2000 MHz high band which is electrically beam tilted and fed by the phase shifter of the present invention described above.

The plurality of third dipole radiation elements 730 simultaneously radiates a radio signal of 800 MHz or 900 MHz low band and a radio signal of 1800 MHz or 1900 MHz or 2000 MHz high band, which are electrically beam tilted and fed by the above-described phase shifter of the present invention. .

On the other hand, the plurality of first to third dipole radiation elements 710, 720, 730 are each connected via a cable of the same length as the phase shifter of the present invention as described above.

Referring to FIG. 8A, referring to the first dipole radiation device 710, the first dipole radiation device 720 is an 'X' shaped strip dipole radiation device for '± 45 °' dual polarization in a low band, and is substantially four. Radiation elements are arranged and have a radiation gain of about 14 dBi.

Referring to FIG. 8B, referring to the second dipole radiation device 720, the second dipole radiation device 720 is a diamond-shaped strip dipole radiation device for a high band '± 45 °' double polarization. The diamond strip dipole replica is made by symmetrically arranging two '+ 45 °' dipole radiation elements and two '-45 °' dipole radiation elements, and each of eight radiation elements is arranged to obtain approximately 17 dBi radiation gain. Have

The third dipole radiating element 730 illustrated in FIG. 8C is implemented by integrating the first dipole radiating element 710 for low band frequency radiation and the second dipole radiating element 720 for high band frequency radiation. The low band frequency signal and the high band frequency signal can be simultaneously copied.

As shown in the figure, the base station antenna 700 according to the present invention includes first and second beam width adjusting plates 711 and 712 and second dipole radiation for adjusting the beam width of the first dipole radiation element 710. A beam width adjusting member 721 for adjusting the beam width of the device 710 is further provided.

In addition, the base station antenna 700 according to the present invention further includes a plurality of interference prevention members 740 for preventing interference between the arranged dipole radiation elements, the interference prevention member 740 is the dipole radiation element Irregularly arranged between them.

As shown in FIG. 8D, the first and second beam width adjusting plates 711 and 712 are formed to be symmetrically spaced apart from both sides with respect to the first dipole radiation element 710.

As shown in FIG. 8E, the beam width adjusting member 721 has a hexahedron shape so as to surround a slope of the diamond-shaped second dipole rework element 710. In addition, slits 722 of a predetermined size are formed in the central portion of each surface of the beam width adjusting member 721, which is caused by the electromagnetic waves flowing into the beam width adjusting member 721 not resonating to the outside through the slit 722. To leak.

FIG. 8F illustrates a front perspective view of the beam width adjusting member 721 surrounding the slopes of the diamond-shaped second dipole cutting element 710.

As described above, since the frequency of the low band is about 2 times lower than that of the high band frequency, the base station antenna 700 of the present invention includes the first dipole radiation element 710 for the low band frequency radiation. The second dipole radiation element 720 for radiation, and the third dipole radiation element 730 for radiation of the low band and the high band frequency are intersected and arranged.

As described above, the base station antenna of the present invention has a unique arrangement of dual band dual polarized radiating elements having a standard horizontal beam width of 65 ° for both bands and satisfying 30 dB of interpolarization and interband separation. Have

First, in the present invention, when the dipole radiating elements are disposed on the back plate opposite to the phase shifter of the present invention, both sides of the dipole radiating elements improve the lateral symmetry of the horizontal radiation pattern. If the radiation elements are arranged side by side in parallel to the rear plate of the antenna for each band, the horizontal symmetry of the horizontal radiation pattern becomes worse, and if the vertical arrangement is performed, the physical size of the antenna becomes too large and the transmission loss increases, thereby reducing the gain.

Second, the present invention improves the separation between bands of antennas by intersecting an 'X' shaped dipole radiating element for radiating a low band frequency and a diamond dipole radiating element for radiating a high band frequency. If the 'X'-shaped dipole radiating element or diamond radiating element is adjacent to each other in the same band, the excitation direction of the electric field between the bands is the same, which may cause unnecessary electromagnetic coupling.

Third, in the present invention, in the case of the 'X'-shaped dipole radiating element, the beam width adjusting plate is attached to both sides to obtain a horizontal beam width of 65 °, and in the case of the diamond dipole radiating element, the relatively wide antenna back plate makes the beam width narrower. The beam width adjusting member is attached to prevent the beam width from being narrowed by the back plate to obtain a horizontal beam width of 65 °.

Fourth, the present invention attaches the beam width adjusting member of the diamond dipole radiation element to prevent deterioration of the polarization separation due to the arrangement of the radiation elements, and the beam width adjusting member has a slit at the center of each side, Diamond-shaped dipole radiation element Electromagnetically coupled to the excitation field prevents the radiation pattern from collapsing. In addition, the slit of the beam width adjusting member does not resonate even when electromagnetic waves are introduced into the beam width adjusting member so that electromagnetic waves introduced through the slit are leaked to weaken the resonator effect. Accordingly, the beam width adjusting member adjusts the high band horizontal beam width by the slit, improves the separation between polarizations, and maintains a clean horizontal radiation pattern of symmetry.

Although the technical spirit of the present invention has been described in detail according to the above-described preferred embodiment, it should be noted that the above-described embodiment is for the purpose of description and not of limitation. In addition, those skilled in the art will understand that various embodiments are possible within the scope of the technical idea of the present invention.

As described above, the present invention implements a phase shifter using an air layer strip transmission line and a dielectric load, and implements a base station antenna using the same, and has the following effects.

First, by implementing the air phase strip transmission line and implementing a phase shifter so that the dielectric load floats in the air between the strip transmission lines, the passive intermodulation characteristics can be significantly improved.

Second, by implementing phase shifters in the form of multi-layered substrates such as air strip transmission lines and dielectric load strip transmission lines, significantly reducing the physical thickness and footprint of the product and reducing the rapid loss of the array. A dual-band dual polarized antenna that simultaneously accommodates up to 1900MHz or 2000MHz band can be implemented.

Third, by implementing the antenna using a phase shifter having a small physical thickness and a small occupied area, it is possible to significantly reduce the manufacturing cost of the product and significantly increase the price competitiveness of the product.

Claims (22)

A phase shifter for electrical beam tilt adjustment of a base station antenna in a mobile communication system, A power distribution unit for distributing a radio wave signal input from the outside in both directions with a constant signal intensity; First and second strip transmission lines for transmitting the radio wave signal distributed by the power distribution unit to first and second output terminals, respectively; A dielectric plate disposed on a predetermined portion of the first and second strip transmission lines so as to shift left and right on the first and second strip transmission lines and shift a phase of a radio signal output through the first and second output terminals; And Sliding bar for moving the dielectric plates on the first and second strip transmission lines from side to side within a certain distance according to a user's manipulation Phase shifter comprising a. The method of claim 1, And the first and second strip transmission lines are formed in an air layer between two spaced apart ground copper plates. The method of claim 2, The dielectric plate is symmetrically spaced apart at regular intervals above and below the first and second strip transmission lines, and at a predetermined interval in the air layer between the first and second strip transmission lines and the first and second ground copper plates. Phase shifter, characterized in that formed spaced apart. A phase shifter for electrical beam tilt adjustment of a base station antenna in a mobile communication system, A first phase shift unit for distributing a radio wave signal input from the outside in both directions with a constant intensity of the signal; A second phase shift unit for distributing the signal output from the first phase shift unit in both directions with constant intensity and transmitting the signal to the first and second output terminals; And A third phase shifter for distributing the signal output from the first phase shifter in both directions with constant intensity to be transmitted to the third and fourth output terminals; Phase shifter comprising a. The method of claim 4, wherein The first to third phase shift parts, respectively A first power distribution unit for distributing a radio wave signal input from the outside in both directions with a constant signal intensity; First and second strip transmission lines for transmitting a radio wave signal distributed by the first power distributor to an input terminal of the second and third phase shift units, respectively; A first dielectric disposed on a predetermined portion of the first and second strip transmission lines to shift the phase of the radio signal which is moved left and right on the first and second strip transmission lines and output to the second and third phase shift units; plate; A second power distribution unit for distributing a radio wave signal transmitted by the first phase shifter in both directions with a constant signal intensity; Third and fourth strip transmission lines for transmitting the radio wave signals distributed by the second power distributor to two output terminals, respectively; A second dielectric plate disposed at a portion of the third and fourth strip transmission lines to shift a phase of a radio signal transmitted to the two output terminals by moving left and right on the third and fourth strip transmission lines; And According to the user's manipulation, the first dielectric plate on the first and second strip transmission lines is moved left and right within a certain distance and the second dielectric plate on the third and fourth strip transmission lines is moved left and right within a certain distance. Sliding bar for Phase shifter comprising a. The method of claim 5, And said first and second dielectric plates are moved simultaneously by said sliding bar. The method of claim 6, And the length of the first and second strip transmission lines in which the first dielectric plate is located is substantially twice as long as the length of the third and fourth strip transmission lines in which the second dielectric plate is located. A phase shifter for electrical beam tilt adjustment of a base station antenna in a mobile communication system, A first phase shift unit for distributing a radio wave signal input from the outside in both directions with a constant intensity of the signal; Second and third phase shifters for distributing and transmitting signals output from the first phase shifter in a constant bidirectional direction; A fourth phase shifter for distributing the signal output from the second phase shifter in both directions with constant intensity and transmitting the signal to the first and second output terminals; A fifth phase shifter for distributing the signal output from the second phase shifter in both directions with constant intensity to be transmitted to the third and fourth output terminals; A sixth phase shifter for distributing the signal output from the third phase shifter in both directions with a constant intensity to transmit to the fifth and sixth output terminals; And A seventh phase shifter for transmitting the signal output from the third phase shifter to the seventh and eighth output stages in which the intensity is uniformly distributed in both directions. Phase shifter comprising a. The method of claim 8, The first phase shift unit, A first power distribution unit for distributing a radio wave signal input from the outside in both directions with a constant signal intensity; First and second strip transmission lines for transmitting a radio wave signal distributed by the first power distributor to an input terminal of the second and third phase shift units, respectively; A first dielectric disposed on a predetermined portion of the first and second strip transmission lines to shift the phase of the radio signal which is moved left and right on the first and second strip transmission lines and output to the second and third phase shift units; plate; And Sliding bar for moving the first dielectric plate on the first and second strip transmission line from side to side within a certain distance according to a user's manipulation Phase shifter comprising a. The method of claim 9, The second phase shift unit, A second power distribution unit for distributing a radio wave signal transmitted by the first phase shifter in both directions with a constant signal intensity; Third and fourth strip transmission lines for transmitting the radio wave signal distributed by the second power distributor to the input terminals of the fourth and fifth phase shifters, respectively; A second portion disposed at a predetermined portion of the third and fourth strip transmission lines so as to shift the phase of the radio signal transmitted to the input terminals of the fourth and fifth phase shift portions by moving left and right on the third and fourth strip transmission lines. 2 dielectric plates; And The sliding bar for moving the second dielectric plate on the third and fourth strip transmission lines from side to side within a certain distance according to a user's manipulation; Phase shifter comprising a. The method of claim 10, The third phase shift unit, A third power distribution unit for distributing the radio wave signal transmitted by the first phase shifter in both directions with a constant signal intensity; Fifth and sixth strip transmission lines for transmitting the radio wave signal distributed by the third power distributor to the input terminals of the sixth and seventh phase shifters, respectively; A second portion disposed on a predetermined portion of the fifth and sixth strip transmission lines so as to shift the phase of the radio signal transmitted to the input ends of the sixth and seventh phase shift parts by moving left and right on the fifth and sixth strip transmission lines. 3 dielectric plates; And The sliding bar for moving the third dielectric plate on the fifth and sixth strip transmission lines from side to side within a certain distance according to a user's manipulation; Phase shifter comprising a. The method of claim 11, The fourth and fifth phase shifters, respectively, A fourth power distribution unit for distributing the radio wave signal transmitted by the second phase shifter in both directions with a constant signal intensity; Seventh and eighth strip transmission lines for transmitting the radio wave signals distributed by the third power distributor to two output terminals, respectively; A fourth dielectric plate disposed on a portion of the seventh and eighth strip transmission lines so as to shift a phase of the radio signal transmitted left and right on the seventh and eighth strip transmission lines and transmitted to the two output terminals; And The sliding bar for moving the fourth dielectric plate on the seventh and eighth strip transmission lines from side to side within a predetermined distance according to a user's manipulation; Phase shifter comprising a. The method of claim 12, The sixth and seventh phase shift parts, respectively A fifth power distributor for distributing the radio wave signal transmitted by the third phase shifter in both directions with a constant signal intensity; Ninth and tenth strip transmission lines for transmitting the radio wave signals distributed by the fifth power distributor to two output terminals, respectively; A fifth dielectric plate disposed on a portion of the ninth and tenth strip transmission lines so as to shift a phase of a radio signal transmitted to the two output terminals by moving left and right on the ninth and tenth strip transmission lines; And The sliding bar for moving the fifth dielectric plate on the ninth and tenth strip transmission lines from side to side within a predetermined distance according to a user's manipulation; Phase shifter comprising a. The method of claim 13, And said first to fifth dielectric plates are moved simultaneously by said sliding bar. The method of claim 14, The length of the first and second strip transmission lines in which the first dielectric plate is located is substantially twice as long as the length of the third to sixth strip transmission lines in which the second and third dielectric plates are located, respectively, The length of the third to sixth strip transmission lines in which the second and third dielectric plates are respectively located is substantially twice as long as the length of the seventh to tenth strip transmission lines in which the fourth and fifth dielectric plates are respectively located. Phase shifter, characterized in that. The method according to any one of claims 1, 4 and 8, And said output stages are each connected to a dipole radiation element of said base station antenna via a cable of equal length. A base station antenna using a phase shifter for electrical beam tilt, A first dipole radiation element for radiating a low band frequency signal electrically beam tilted and fed by the phase shifter; And And a second dipole radiation element for radiating a high band frequency signal electrically fed by the phase shifter and supplied with power, The first dipole radiating element is a base station antenna, characterized in that formed on top of the second dipole radiating element. A base station antenna using a phase shifter for electrical beam tilt, At least one first dipole radiation element for radiating a low band frequency signal electrically beam tilted and fed by the phase shifter; At least one second dipole radiation element for radiating a high band frequency signal electrically beam tilted and fed by the phase shifter; And At least one third dipole radiation element for simultaneously copying the low-band and high-band frequency signal that is electrically beam tilted and fed by the phase shifter, The at least one first to third dipole radiating element is a base station antenna, characterized in that arranged in an irregular order. The method of claim 17 or 18, In order to adjust the beam width of the first dipole radiating element, the first and second beam width control plates are formed symmetrically spaced apart on both sides of the first dipole radiating element of the 'X' shape Base station antenna further comprising. The method of claim 17 or 18, Further comprising a beam width adjusting member for adjusting the beam width of the second dipole radiation element, The beam width adjusting member is a base station antenna, characterized in that the hexahedron shape surrounding the slope of the diamond-like second dipole radiation element. The method of claim 20, The base station antenna, characterized in that the slit of a predetermined size is formed in the central portion of each surface of the beam width adjusting member. The method of claim 18, The third dipole radiation element, The base station antenna, characterized in that the first and second dipole radiating element, wherein the first dipole radiating element is formed spaced apart on the second dipole radiating element.