CN206422228U - A kind of compact oval ring Bipolarization antenna for base station - Google Patents

Abstract

The utility model discloses a compact elliptical annular dual-polarization base station antenna, which comprises a dielectric substrate, a reflective floor, a first coaxial line and a second coaxial line, and the lower surface of the dielectric substrate is provided with a first elliptical annular radiation unit , the second elliptical annular radiation unit, the third elliptical annular radiation unit and the fourth elliptical annular radiation unit, the upper surface is provided with a first Y-shaped feed unit and a second Y-shaped feed unit; the first elliptical annular radiation unit The first antenna structure is formed symmetrically with the third elliptical ring radiating unit, and the second antenna structure is formed symmetrically with the second elliptical ring radiating unit and the fourth elliptical ring radiating unit; The radiating unit is connected to the first Y-shaped feeding unit, and the second coaxial line is connected to the second elliptical ring-shaped radiating unit and the second Y-shaped feeding unit respectively. The utility model has excellent performance, simple structure, convenient processing, low processing cost and simple and convenient adjustment.

Description

A Compact Elliptical Ring Dual Polarized Base Station Antenna

technical field

The utility model relates to a dual-polarized base station antenna, in particular to a compact elliptical-circular dual-polarized base station antenna, which belongs to the technical field of wireless mobile communication.

Background technique

In a modern mobile communication system, the base station antenna is a converter between electrical signals and space radiated electromagnetic waves between communication devices. Its performance will directly affect the overall performance of the entire system. Therefore, the base station antenna plays an important role in the entire communication system. . Modern base station antennas can make the coverage of mobile communication networks wider, the communication capacity is larger, and the rate is higher. Dual-polarization base station antennas can increase capacity and meet other performance indicators.

With the continuous development of modern telecommunication technology, mobile communication has entered the fourth generation mobile communication network (4G network), and the fifth generation mobile communication (5G network) is also under research and development. Under the current new-generation mobile communication system, various communication standards require base station antennas to be shared by multiple systems, thereby saving the number of base stations and reducing network construction costs. Existing communication systems such as GSM1800, CDMA, WCDMA and TD-WCDMA have frequency bands ranging from 1710MHz to 2170MHz, so a base station antenna that can completely cover 1710MHz to 2170MHz is required, and all indicators are required to have stable broadband characteristics , such as standing wave ratio bandwidth (VSWR<1.5), half-power lobe width meeting 65°±5°, gain, isolation, cross-polarization ratio, etc., and the cost control and simple structure of the base station antenna are also very important.

According to the investigation and understanding, the currently disclosed prior art is as follows:

1) In 2016, Wen Dingliang and others published an article entitled "A Dual-polarized Planar Antenna Using Four Folded Dipoles and Its Array for BaseStations" on IEEE ANTENNAS AND PROPAGATION, which achieved a wider impedance bandwidth by using a Y-type feed .

2) In 2009, Y.-H.Huang et al. published an article titled "Broadband dual-polarized antenna with high isolation for wireless communication" on ELECTRONICS LETTERS, which realizes wideband dual-polarized antenna with high isolation for wireless communication through bending structure and coaxial line feeding. Impedance bandwidth and stable pattern, so a wide impedance bandwidth and stable radiation pattern are obtained.

Utility model content

The purpose of this utility model is to solve the defects of the above-mentioned prior art, and provide a compact elliptical circular dual-polarization base station antenna, which has excellent performance, simple structure, convenient processing, low processing cost, and simple and convenient adjustment.

The purpose of this utility model can be achieved by taking the following technical solutions:

A compact elliptical circular dual-polarized base station antenna, comprising a dielectric substrate, a reflective floor, a first coaxial line and a second coaxial line, the reflective floor is located below the dielectric substrate, the first coaxial line and the second coaxial The line is located between the dielectric substrate and the reflective floor, the lower surface of the dielectric substrate is provided with a first elliptical annular radiation unit, a second elliptical annular radiation unit, a third elliptical annular radiation unit and a fourth elliptical annular radiation unit, and the dielectric substrate The upper surface is provided with a first Y-shaped feed unit and a second Y-shaped feed unit;

The first elliptical-ring radiating unit and the third elliptical-ring radiating unit are symmetrical to each other to form a first antenna structure, and the second elliptical-ring radiating unit and the fourth elliptical-ring radiating unit are symmetrical to each other to form a second antenna structure;

The first coaxial line is respectively connected with the first elliptical annular radiation unit and the first Y-shaped feed unit, and the second coaxial line is respectively connected with the second elliptical annular radiation unit and the second Y-shaped feed unit.

As a preferred solution, the first elliptical ring radiation unit, the second ellipse ring radiation unit, the third ellipse ring radiation unit and the fourth ellipse ring radiation unit are arranged on the lower surface of the dielectric substrate sequentially in a circumferential manner.

As a preferred solution, the lower surface of the dielectric substrate is also provided with a first parasitic unit, a second parasitic unit, a third parasitic unit and a fourth parasitic unit, and the first parasitic unit is located between the first elliptical annular radiation unit and Between the second elliptical ring radiation unit, the second parasitic unit is located between the second elliptical ring radiation unit and the third elliptical ring radiation unit, and the third parasitic unit is located between the third elliptical ring radiation unit and the fourth elliptical ring radiation unit Between the radiation units, the fourth parasitic unit is located between the fourth elliptical ring radiation unit and the first ellipse ring radiation unit.

As a preferred solution, the first Y-shaped feeding unit includes a first microstrip portion connected in sequence and a first bent extension portion, and the second Y-shaped feeding unit includes a second microstrip portion connected in sequence , the third microstrip part, the fourth microstrip part and the second bent extension part, wherein the third microstrip part is located on the lower surface of the dielectric substrate; wherein, the first bent extension part is used to couple and excite the third ellipse The ring-shaped radiation unit, the second bent extension part is used to couple and excite the fourth elliptical ring-shaped radiation unit.

As a preferred solution, the dielectric substrate is provided with a first through hole, a second through hole, a third through hole and a fourth through hole, and the second microstrip part passes through the third through hole and the third microstrip. The third microstrip part is connected to the fourth microstrip part through the fourth through hole; the outer conductor of the first coaxial line is welded to the first elliptical annular radiation unit, and the inner conductor of the first coaxial line passes through The first through hole is welded to the first microstrip part, the outer conductor of the second coaxial line is welded to the second elliptical annular radiation unit, and the inner conductor of the second coaxial line is connected to the second microstrip through the second through hole. The belt part is welded.

As a preferred solution, a first flange and a second flange perpendicular to the reflective floor are provided around the reflective floor.

As a preferred solution, the reflective floor, the first flange and the second flange are all made of copper sheet.

As a preferred solution, both the first coaxial line and the second coaxial line use a coaxial line with an impedance of 50Ω.

Compared with the prior art, the utility model has the following beneficial effects:

1. The elliptical annular dual-polarization base station antenna of the present invention is provided with four elliptical annular radiation units on the lower surface of the dielectric substrate, and these four elliptical annular radiation units form two antenna structures symmetrically in pairs, so that the antenna has good performance and structure It has the advantages of simplicity and low processing cost. At the same time, two Y-shaped feed units are arranged on the upper surface of the dielectric substrate, which can not only adjust the impedance matching, but also realize a stable antenna pattern bandwidth together with four elliptical radiation units.

2. The elliptical annular dual-polarized base station antenna of the present invention is also equipped with four parasitic units on the lower surface of the dielectric substrate. Since the four elliptical annular radiation units are arranged in a circular manner, each parasitic unit is arranged on two adjacent Between the elliptical ring radiating units, the high-frequency bandwidth is extended through these four parasitic units, and two resonance points appear within the required frequency band range (1.71GHz-2.17GHz), of which the first resonance point has an elliptical ring radiating unit control, the second resonance point is controlled by the parasitic unit.

3. The layout of the elliptical annular dual-polarization base station antenna of the utility model is reasonable, four elliptical annular radiation units are distributed on the lower surface of the dielectric substrate, and two Y-shaped feed units are distributed on the upper surface of the dielectric substrate, so that the Y-shaped feeder The electric unit can not only adjust the impedance matching, but also participate in the radiation.

4. The elliptical annular dual-polarized base station antenna of the present invention has a compact structure and a small size. In actual application scenarios, it has more advantages than existing similar antennas. Simulations show that the forward transmission parameters are within the required frequency band ( 1.71GHz-2.17GHz frequency band) is less than -25dB, which means that the required frequency band can be completely covered, the VSWR is less than 1.5 in the required frequency band, the gain is greater than 8dB in the required frequency band, and the lobe width In the required frequency band, they are all between 60° and 70°, meeting the requirement of 65°±5°.

Description of drawings

FIG. 1 is a schematic diagram of the three-dimensional structure of the elliptical circular dual-polarized base station antenna of the present invention.

Fig. 2 is a three-dimensional schematic diagram of the welding of the elliptical circular radiation unit, the Y-shaped feed unit and the coaxial line of the elliptical circular dual-polarized base station antenna of the present invention.

FIG. 3 is a schematic diagram of the structure of the lower surface of the dielectric substrate of the elliptical circular dual-polarized base station antenna of the present invention.

FIG. 4 is a schematic diagram of the upper surface structure of the dielectric substrate of the elliptical circular dual-polarized base station antenna of the present invention.

FIG. 5 is an electromagnetic simulation curve diagram of the S21 parameter of the elliptical circular dual-polarization base station antenna of the present invention.

FIG. 6 is an electromagnetic simulation curve diagram of the standing wave ratio (VSWR) of the elliptical circular dual-polarization base station antenna of the present invention.

FIG. 7 is an electromagnetic simulation curve diagram of the gain of the elliptical circular dual-polarization base station antenna of the present invention.

FIG. 8 is an electromagnetic simulation curve diagram of the half-power lobe width in the horizontal plane of the elliptical circular dual-polarized base station antenna of the present invention.

FIG. 9 is an electromagnetic simulation curve diagram of the half-power lobe width in the vertical plane of the elliptical circular dual-polarized base station antenna of the present invention.

FIG. 10 is an electromagnetic simulation graph of the radiation pattern of the elliptical circular dual-polarized base station antenna of the present invention at 1.7 GHz.

Fig. 11 is an electromagnetic simulation graph of the radiation pattern of the elliptical circular dual-polarized base station antenna of the present invention at 1.9 GHz.

Fig. 12 is an electromagnetic simulation graph of the radiation pattern of the elliptical circular dual-polarization base station antenna of the present invention at 2.1 GHz.

Fig. 13 is an electromagnetic simulation curve diagram of the cross-polarization ratio of the elliptical circular dual-polarized base station antenna of the present invention at 1.7 GHz.

FIG. 14 is an electromagnetic simulation curve diagram of the cross-polarization ratio of the elliptical circular dual-polarized base station antenna of the present invention at 1.9 GHz.

Fig. 15 is an electromagnetic simulation curve diagram of the cross-polarization ratio of the elliptical circular dual-polarized base station antenna of the present invention at 2.1 GHz.

Among them, 1-dielectric substrate, 2-reflecting floor, 3-first coaxial line, 4-second coaxial line, 5-first flanging, 6-second flanging, 7-first elliptical annular radiation unit, 8-the second elliptical ring radiation unit, 9-the third elliptical ring radiation unit, 10-the fourth ellipse ring radiation unit, 11-the first parasitic unit, 12-the second parasitic unit, 13-the third parasitic unit, 14- The fourth parasitic unit, 15-the first Y-shaped feed unit, 16-the second Y-shaped feed unit, 17-the first microstrip part, 18-the first bent extension part, 19-the second microstrip part, 20-third microstrip part, 21-fourth microstrip part, 22-second bent extension part, 23-first through hole, 24-second through hole, 25-third through hole, 26-fourth through hole.

detailed description

The utility model will be further described in detail below in conjunction with the embodiments and accompanying drawings, but the implementation of the utility model is not limited thereto.

Example 1:

As shown in FIGS. 1-4 , the elliptical circular dual-polarized base station antenna of this embodiment includes a dielectric substrate 1 , a reflective floor 2 , a first coaxial line 3 and a second coaxial line 4 .

The dielectric substrate 1 is made of a PCB, the reflective floor 2 is located below the dielectric substrate 1, and its surroundings are provided with a first flange 5 and a second flange 6 perpendicular to the reflective floor 2. The reflective floor 2 , the first flange 5 and the second flange 6 are made of metal material, preferably copper sheet; the first coaxial line 3 and the second coaxial line 4 are located between the dielectric substrate 1 and the reflective floor 2, The first coaxial line 3 and the second coaxial line 4 are used to transmit signals, and the impedance is 50Ω.

The lower surface of the dielectric substrate 1 is provided with a first elliptical ring radiation unit 7, a second elliptical ring radiation unit 8, a third elliptical ring radiation unit 9, a fourth ellipse ring radiation unit 10, a first parasitic unit 11, a second The parasitic unit 12, the third parasitic unit 13 and the fourth parasitic unit 14;

The first elliptical ring radiation unit 7, the second elliptical ring radiation unit 8, the third ellipse ring radiation unit 9 and the fourth ellipse ring radiation unit 10 are arranged on the lower surface of the dielectric substrate 1 sequentially in a circumferential manner. An elliptical ring radiation unit 7 and a third elliptical ring radiation unit 9 are symmetrical to each other to form a first antenna structure, and the second elliptical ring radiation unit 8 and the fourth elliptical ring radiation unit 10 are symmetrical to each other to form a second antenna structure;

The first parasitic unit 11 is located between the first elliptical ring radiation unit 7 and the second elliptical ring radiation unit 8, and the second parasitic unit 12 is located between the second elliptical ring radiation unit 8 and the third elliptical ring radiation unit 9 Between, the third parasitic unit 13 is located between the third elliptical ring radiation unit 9 and the fourth elliptical ring radiation unit 10, and the fourth parasitic unit 14 is located between the fourth elliptical ring radiation unit 10 and the first elliptical ring radiation unit 7, these four parasitic units are used to extend the high-frequency bandwidth.

The upper surface of the dielectric substrate 1 is provided with a first Y-shaped feed unit 15 and a second Y-shaped feed unit 16, the first Y-shaped feed unit 15 is used to feed the first antenna structure, including sequentially connected The first microstrip part 17 and the first bent extension part 18; the second Y-shaped feed unit 16 is used to feed the second antenna structure, including the second microstrip part 19 and the third microstrip part 20 connected in sequence , the fourth microstrip portion 21 and the second bent extension portion 22, wherein the third microstrip portion 20 is located on the lower surface of the dielectric substrate 1; the first bent extension portion 18 is used to couple and excite the third elliptical annular radiation unit 9. The second bent extension portion 22 is used to couple and excite the fourth elliptical annular radiation unit 10 .

The dielectric substrate 1 is provided with a first through hole 23, a second through hole 24, a third through hole 25 and a fourth through hole 26, and the second microstrip part 19 passes through the third through hole 25 and the third microstrip. The strip part 20 is connected, and the third microstrip part 20 is connected to the fourth microstrip part 21 through the fourth through hole 26;

The first coaxial line 3 is respectively connected to the first elliptical annular radiation unit 7 and the first Y-shaped feed unit 15, specifically: the outer conductor of the first coaxial line 3 is welded to the first elliptical annular radiation unit 7, and the second The inner conductor of the coaxial line 3 is welded to the first microstrip part 17 through the first through hole 23;

The second coaxial line 4 is respectively connected to the second elliptical annular radiation unit 8 and the second Y-shaped feed unit 16, specifically: the outer conductor of the second coaxial line 4 is welded to the second elliptical annular radiation unit 8 , the inner conductor of the second coaxial line 4 is welded to the second microstrip part 19 through the second through hole 24 .

As shown in Figure 5, it is the S21 parameter (forward transmission coefficient, i.e. gain) electromagnetic simulation curve of the elliptical annular dual-polarized base station antenna of the present embodiment, can see the S21 parameter of the elliptical annular dual-polarized base station antenna of the present embodiment Less than -25dB in the required frequency band (1.71GHz-2.17GHz frequency band), which means that the required frequency band can be completely covered.

As shown in Figure 6, it is the electromagnetic simulation curve (port1 refers to the standing wave ratio of input port 1, and port2 refers to the standing wave ratio of output port 2) of the standing wave ratio (VSWR) of the elliptical ring dual-polarization base station antenna of the present embodiment. , it can be seen that the standing wave ratio of the two ports is less than 1.5 in the required frequency band (1.71GHz-2.17GHz frequency band).

As shown in Figure 7, it is the electromagnetic simulation curve (port1 refers to the gain of input port 1, and port2 refers to the gain of output port 2) of the gain of the elliptical circular dual-polarized base station antenna of the present embodiment. It can be seen that the two ports The gain is greater than 8dB in the required frequency band (1.71GHz-2.17GHz frequency band).

As shown in Fig. 8 and Fig. 9, it is respectively the electromagnetic simulation curve (port1 refers to the horizontal plane half-power lobe width of input port 1 of the elliptical circular dual-polarized base station antenna of the present embodiment, and port2 refers to output The electromagnetic simulation curves of the horizontal half-power lobe width of port 2) and the vertical half-power lobe width (port1 refers to the vertical half-power lobe width of the input port 1, and port2 refers to the vertical half-power lobe width of the output port 2 ), it can be seen that in the required frequency band (1.71GHz-2.17GHz frequency band), the lobe widths of the two ports are both between 60° and 70°, meeting the requirement of 65°±5°.

As shown in Figure 10, Figure 12 and Figure 13, they are the electromagnetic simulation curves of the radiation pattern of the elliptical ring dual-polarized base station antenna of the present embodiment at 1.7GHz, 1.9GHz, and 2.1GHz respectively; Figure 13, Figure 14 and Figure 15 shows the electromagnetic simulation curves of the cross-polarization ratios of the elliptical circular dual-polarized base station antenna of this embodiment at 1.7GHz, 1.9GHz, and 2.1GHz, and it can be seen that it fully meets the requirements of the base station antenna.

In summary, the elliptical annular dual-polarization base station antenna of the present invention is provided with four elliptical annular radiation units on the lower surface of the dielectric substrate, and these four elliptical annular radiation units form two antenna structures symmetrically in pairs, so that the antenna has high performance It has the advantages of good quality, simple structure and low processing cost. At the same time, two Y-shaped feed units are set on the upper surface of the dielectric substrate, which can not only adjust the impedance matching, but also realize a stable antenna pattern bandwidth together with four elliptical radiation units.

The above is only a preferred embodiment of the utility model patent, but the scope of protection of the utility model patent is not limited thereto, any skilled person familiar with the technical field within the disclosed scope of the utility model patent, according to The technical scheme of the utility model patent and the equivalent replacement or change of the utility model concept all belong to the protection scope of the utility model patent.

Claims (8)

1. a kind of compact oval ring Bipolarization antenna for base station, including medium substrate, reflection floor, the first coaxial line and second Coaxial line, the reflection floor be located at medium substrate below, first coaxial line and the second coaxial line be located at medium substrate with Reflect between floor, it is characterised in that：The lower surface of the medium substrate is provided with the first oval ring radiating element, the second ellipse Ring radiation unit, the 3rd oval ring radiating element and the 4th oval ring radiating element, the upper surface of medium substrate is provided with First Y shape feed element and the second Y shape feed element；

The first oval ring radiating element and the 3rd oval ring radiating element symmetrically form first antenna structure, institute State the second oval ring radiating element and the 4th oval ring radiating element symmetrically forms the second antenna structure；

First coaxial line is connected with the first oval ring radiating element, the first Y shape feed element respectively, and described second is coaxial Line is connected with the second oval ring radiating element, the second Y shape feed element respectively.

2. a kind of compact oval ring Bipolarization antenna for base station according to claim 1, it is characterised in that：Described first Oval ring radiating element, the second oval ring radiating element, the 3rd oval ring radiating element and the radiation of the 4th oval ring Unit is arranged in the lower surface of medium substrate with circular manner successively.

3. a kind of compact oval ring Bipolarization antenna for base station according to claim 2, it is characterised in that：The medium The lower surface of substrate is additionally provided with the first parasitic element, the second parasitic element, trixenie unit and the 4th parasitic element, described One parasitic element is located between the first oval ring radiating element and the second oval ring radiating element, second parasitic element Between the second oval ring radiating element and the 3rd oval ring radiating element, it is ellipse that the trixenie unit is located at the 3rd Between circular ring-shaped radiation unit and the 4th oval ring radiating element, the 4th parasitic element is radiated positioned at the 4th oval ring Between unit and the first oval ring radiating element.

4. a kind of compact oval ring Bipolarization antenna for base station according to claim 1, it is characterised in that：Described first Y shape feed element includes the first micro-strip part being sequentially connected and the first bending extension, the second Y shape feed element bag The second micro-strip part being sequentially connected, the 3rd micro-strip part, the 4th micro-strip part and the second bending extension are included, wherein the 3rd Micro-strip part is located at the lower surface of medium substrate；The first bending extension is radiated for the oval ring of coupling excitation the 3rd Unit, the second bending extension is used for the oval ring radiating element of coupling excitation the 4th.

5. a kind of compact oval ring Bipolarization antenna for base station according to claim 4, it is characterised in that：The medium First through hole, the second through hole, third through-hole and fourth hole are offered on substrate, the second micro-strip part passes through third through-hole It is connected with the 3rd micro-strip part, the 3rd micro-strip part is connected by fourth hole with the 4th micro-strip part；Described first is same The outer conductor of axis is mutually welded with the first oval ring radiating element, and the inner wire of the first coaxial line passes through first through hole and first Micro-strip part is mutually welded, and the outer conductor of second coaxial line is mutually welded with the second oval ring radiating element, the second coaxial line Inner wire mutually welded with the second micro-strip part by the second through hole.

6. a kind of compact oval ring Bipolarization antenna for base station according to claim any one of 1-5, it is characterised in that： First flange and the second flange that are surrounded by with reflection floor perpendicular on the reflection floor.

7. a kind of compact oval ring Bipolarization antenna for base station according to claim 6, it is characterised in that：The reflection Floor, the first flange and the second flange are made of copper sheet.

8. a kind of compact oval ring Bipolarization antenna for base station according to claim any one of 1-5, it is characterised in that： First coaxial line and the second coaxial line use impedance for 50 Ω coaxial line.