JP2018166294A - Antenna for transmitting and receiving both polarization waves - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an antenna for transmitting and receiving both polarization waves that has a simpler configuration.SOLUTION: In an antenna for transmitting and receiving both polarization waves, any two of a dipole antenna, an inverted-F antenna, and an inverted-L antenna whose resonance frequencies are adjusted to be substantially the same as each other are used, and their open end sides are arranged orthogonally at a predetermined distance. An EM power feeding part is arranged so as to be opposed to each of both open end sides at a predetermined interval, and a power feeding line is electrically connected with the EM power feeding part. In this way, due to the antenna for transmitting and receiving both polarization waves according to this embodiment, electromagnetic one-point power feeding from both open end sides of two orthogonal linear antennas whose resonance frequencies are substantially the same as each other is achieved, and thereby, the power feeding part and the high-frequency circuit can be simplified, and a vertical polarization wave and a horizontal polarization wave can be transmitted and received by a simpler configuration. By using the inverted-F antenna and the inverted-L antenna, the antenna for transmitting and receiving both polarization waves can be miniaturized, and a central part of a ground conductor plate can be cut off, and an electronic circuit can be provided.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a dual-polarized transmission / reception antenna, and relates to an antenna that transmits and receives vertical and horizontal polarizations.

When transmitting and receiving two polarizations of vertical polarization and horizontal polarization, two feeding points corresponding to both polarizations are required.
As a technique for transmitting and receiving such two polarized waves, a polarization sharing antenna has been proposed (see Non-Patent Documents 1 and 2). This dual-polarized antenna can transmit and receive two polarizations of vertical polarization and horizontal polarization at the same frequency, or can transmit and receive simultaneously, and is used in fields such as satellite communication and remote sensing.

However, in the conventional dual-polarized antenna, it is necessary to prepare a feeding line for each of two vertically polarized antennas and horizontally polarized antennas arranged on the same plane.
In order to simultaneously transmit and receive two antennas, two high-frequency circuits, ie, a high-frequency circuit for a vertically polarized antenna and a high-frequency circuit for a horizontally polarized antenna are required.

IEICE Transactions '92 / 7 Vol. J75-B-IINo. 7 “A Study on Linearly Polarized Dual-Plane Antenna (Akinori Matsui, Manabu Haneishi)” IEICE Technical Report AP2000-118 "Polarized antenna with dual polarization and its radiation characteristics (Megumi Konno, Manabu Haneishi)"

  An object of the present invention is to enable transmission and reception of vertically polarized waves and horizontally polarized waves with a simpler configuration.

(1) In the first aspect of the present invention, the first linear antenna having at least one open end, and at least one open end, the open end side and the open end side of the first linear antenna. Are arranged at a predetermined interval and substantially orthogonal to the first linear antenna, and are formed at a resonance frequency substantially the same as the resonance frequency of the first linear antenna, and the first linear antenna The first linear antenna and the second linear antenna are arranged to be opposed to each of the open end side of the linear antenna and the open end side of the second linear antenna at a predetermined interval. An electromagnetic coupling type power supply unit (EM power supply unit) that is electromagnetically connected to the EM power supply unit, and the first linear antenna and the second linear antenna that are electrically connected to the EM power supply unit via the EM power supply unit A power supply line for supplying power to Providing both polarizations transmitting and receiving antenna to.
(2) In the invention described in claim 2, further comprising a ground conductor plate, the first linear antenna is disposed substantially parallel to an end surface of the ground conductor plate, and an open end side faces the EM power feeding portion. The antenna main part to be arranged, the first short-circuiting part that short-circuits the opposite end part of the antenna main part on the open end side and the ground conductor plate, and the first mains short-circuiting part of the antenna main part that is open. 2. The dual-polarized transmission / reception antenna according to claim 1, wherein the antenna is an inverted F antenna having a second short-circuit portion that short-circuits the antenna main portion and the ground conductor plate. .
(3) In the invention described in claim 3, further comprising a ground conductor plate, the first linear antenna is disposed substantially parallel to an end surface of the ground conductor plate, and an open end side faces the EM power feeding portion. It is an inverted L antenna having an antenna main portion to be disposed, and a first short-circuit portion that short-circuits the opposite end portion of the antenna main portion on the open end side and the ground conductor plate. A dual-polarized transmission / reception antenna according to claim 1 is provided.
(4) In the invention according to claim 4, the first linear antenna is a dipole antenna, and both of the claims according to any one of claims 1 to 3 are characterized. A polarized wave transmitting / receiving antenna is provided.
(5) In the invention described in claim 5, the second linear antenna is a dipole antenna, an inverted F antenna, or an inverted L antenna. A dual-polarized transmission / reception antenna according to any one of the claims is provided.
(6) In the invention described in claim 6, the resonance frequency f0 of both the polarization transmitting and receiving antennas is f0 = 2.44 GHz, and any one of claims 1 to 5 A dual-polarized transmission / reception antenna according to claim 1 is provided.
(7) The invention according to claim 7, further comprising a high relative dielectric substrate, wherein the first linear antenna and the second linear antenna are formed on the high relative dielectric substrate. A dual-polarized transmission / reception antenna according to any one of claims 1 to 6 is provided.
(8) In the invention described in claim 8, each of the first linear antenna, the second linear antenna, and the EM feeder is formed of a plurality of layers connected to each other via. A dual-polarized transmission / reception antenna according to any one of claims 1 to 7 is provided.
(9) In the invention according to claim 9, in the first linear antenna and the second linear antenna, the shape of the antenna element portion is a linear shape, a meander shape, a helical shape, or a bent end shape, The dual-polarized transmission / reception antenna according to any one of claims 1 to 8 is provided.

  According to the present invention, the first linear antenna and the second linear antenna having substantially the same resonance frequency are orthogonally arranged, and are opposed to both open ends of the two linear antennas at a predetermined interval. By using one-point power feeding by the unit, vertical polarization and horizontal polarization can be transmitted and received with a simpler configuration.

It is a block diagram of the antenna for both polarization transmission / reception. It is explanatory drawing showing the return loss characteristic of the antenna for both polarization transmission / reception. It is explanatory drawing showing the directivity characteristic of the antenna for both polarization transmission / reception. It is explanatory drawing showing the distribution state of the surface current density of both the antennas for polarized wave transmission / reception. It is explanatory drawing showing arrangement | positioning of the antenna for both polarization transmission / reception, and replacement | exchange of polarization. It is explanatory drawing showing the structure of the modification of both the antennas for polarized wave transmission / reception. It is explanatory drawing showing the structure of the other modification of both the antennas for polarized wave transmission / reception. It is explanatory drawing about the modification which changed the shape of the electric power feeding part in both polarized-wave transmission / reception antennas. It is explanatory drawing showing the structure of the other modification of both the antennas for polarized wave transmission / reception.

A preferred embodiment of the dual-polarized transmission / reception antenna of the present invention will be described in detail below with reference to FIGS.
(1) Outline of Embodiment In the dual-polarized transmission / reception antenna of this embodiment, any two of a dipole antenna, an inverted F antenna, and an inverted L antenna whose resonance frequencies are adjusted to be substantially the same are used as the first linear shape. An antenna and a second linear antenna are used, and the open end sides of the two linear antennas are orthogonally arranged with a predetermined distance therebetween.
Then, an EM power feeding part is disposed opposite to each of the open ends of the first linear antenna and the second linear antenna at a predetermined interval, and the power feeding line is electrically connected to the EM power feeding part.
As described above, according to the dual-polarized transmission / reception antenna of the present embodiment, by realizing electromagnetic one-point power feeding from both open ends of two orthogonal linear antennas having substantially the same resonance frequency. The power feeding unit and the high frequency circuit can be simplified. That is, it is possible to obtain a dual-polarized wave transmission / reception antenna that can transmit and receive vertical polarization and horizontal polarization with a simpler configuration.
Here, the orthogonal arrangement of the antennas is arranged in an orthogonal state, and the arrangement in the orthogonal state is not limited to a right angle in a strict sense, but an angle width that can realize a practical dual-polarized transmission / reception antenna. For example, it is set in the range of π / 2 ± 10 degrees, preferably in the range of π / 2 ± 5 degrees.

Specifically, an inverted F antenna 20 (first linear antenna) having an open end on one side of two orthogonal sides of the rectangular ground conductor plate 10 and a dipole antenna on the other side. 30 (second linear antenna) is disposed, and the EM power feeding portion 41 of the power feeding portion 40 is disposed opposite to both open ends.
In the present embodiment, the resonant frequencies of the inverted F antenna 20 and the dipole antenna 30 are set to be substantially the same in order to obtain a dual-polarized transmission / reception antenna having a resonance frequency of 2.44 GHz.
The opposite side of the open end side of the inverted F antenna 20 is short-circuited to the ground conductor plate 10 by the first short-circuit portion 22 and the second short-circuit portion 23.
Although the dipole antenna 30 is not short-circuited to the ground conductor plate 10, the voltage at the central portion of the entire length is zero, so that it can be connected to the ground conductor plate 10 at this central portion.
As described above, by using an inverted F antenna or an inverted L antenna for at least one of the first linear antenna and the second linear antenna, both polarization transmitting and receiving antennas can be reduced in size, and the ground conductor plate The center portion of the slab can be cut off or an electronic circuit can be provided.

(2) Details of Embodiment FIG. 1 is a perspective view showing the configuration of an embodiment of a dual-polarized transmission / reception antenna.
As shown in FIG. 1, the dual-polarized transmission / reception antenna 1 includes a ground conductor plate 10, an inverted F antenna 20 (λ / 4 type antenna), a dipole antenna 30 (λ / 2 type antenna), and a power feeding unit. 40.
The inverted F antenna 20 functions as a first linear antenna, and the dipole antenna 30 functions as a second linear antenna.
The ground conductor plate 10 is formed of a rectangular sheet metal. The size of the ground conductor plate 10 is 40 mm × 40 mm.

The inverted F antenna 20 includes an antenna main portion 21 disposed substantially parallel to the side 11 of the ground conductor plate 10, and a first short-circuit portion 22 that connects the end portion side of the antenna main portion 21 and the ground conductor plate 10. And the second short-circuit portion 23 are provided. The first short-circuit portion 22 connects the end portion of the antenna main portion 21 and the end portion of the ground conductor plate 10, and the second short-circuit portion 23 is substantially parallel to the antenna main portion on the open end side with respect to the first short-circuit portion 22. The part 21 and the ground conductor plate 10 are connected.
The inverted F antenna 20 is formed with a line width of 1 mm as a whole, the length of the antenna main portion 21 is 32 mm, and the length of the first short-circuit portion 22 and the second short-circuit portion 23 is 4 mm (in the drawing, the antenna main portion 21 The width is added and displayed as 5 mm). The size of the inverted F antenna 20 of this size is 2.44 GHz band when used alone.
With respect to the first short-circuit portion 22, the second short-circuit portion 23 is disposed with an interval of 9 mm.
The inverted F antenna 20 of the present embodiment is integrally formed of the same material as the ground conductor plate 10, but may be formed separately and connected to each other, or may be formed of a different material. .

The dipole antenna 30 is provided with an antenna main portion 31 disposed substantially in parallel with the other side 12 orthogonal to the side 11 of the ground conductor plate 10, and extends from the antenna main portion 31 toward the side 11. A bent portion 32 is provided. The bent portion 32 functions as an open end side facing a power supply portion 40 described later.
The dipole antenna 30 is formed with a line width of 1 mm as a whole, the antenna main part 31 is 51 mm long, and the bent part 32 is 7 mm long. The distance between the antenna main portion 31 and the side 12 of the ground conductor plate 10 is 5 mm. The dipole antenna 30 has the same 2.44 GHz band as the inverted F antenna 20 when used alone with an overall length of 58 mm.
The open end of the bent portion 32 and the open end of the antenna main portion 21 in the inverted F antenna 20 are arranged at a predetermined interval so that they do not come into contact with each other. In this embodiment, an interval of 7 mm (not shown) ) Is opened.
The bent portion 32 is bent so as to face the power feeding portion 40, but is not necessary when the power feeding portion 40 side is bent as will be described later, and the antenna main portion 31 is formed longer by that amount. (See FIG. 8 (a)).

The power feeding unit 40 is disposed in parallel with the side 11 of the ground conductor plate 10 so as to be opposed to the open end side of the inverted F antenna 20 and the open end side (bent portion 32) of the dipole antenna 30 with a predetermined distance therebetween. 41 and a power supply line 42 electrically connected to the EM power supply unit 41 at one end side. The other end side of the feed line 42 extends to the ground conductor plate 10 side, and has a feed point P1 at the end thereof.
The power feeding unit 40 is formed to have a line width of 1 mm throughout, and the length of the EM power feeding unit 41 is formed to 17 mm (not shown), and about 5 mm (not shown) on both ends, or in the vicinity thereof. The feed region having the value of 1 is opposed to the open end side of the inverted F antenna 20 and the dipole antenna 30 with an interval of 0.5 mm.

Note that a general inverted-F antenna has a short-circuited portion near the outside of the feeding point in order to facilitate impedance matching of an inverted-L antenna that is bent in the middle to lower the profile. The feeding point is not connected to the ground conductor plate.
On the other hand, in the inverted F antenna 20 of the present embodiment, electromagnetic coupling (EM coupling) is performed by the power feeding unit 40 disposed opposite to the open end side of the antenna main part 21 and the second short circuit corresponding to the power feeding point. The part 23 is connected to the ground conductor plate 10.
However, in the present embodiment, when the EM power feeding portion 41 is electromagnetically fed (EM feeding) to the inverted F antenna 20, a current also flows to the second short-circuit portion 23 via the antenna main portion 21, thereby causing the second short-circuit. The part 23 acts in the same manner as a general feeding point and functions as a general inverted F antenna as a whole.
The same applies to the inverted L antenna used in FIGS. 7 and 9B described later.

The result of having performed the simulation about the dual polarization transmitting / receiving antenna configured as described above will be described.
In other words, the inverted F antenna 20 (λ / 4 type) and the dipole antenna 30 (λ / 2 type) are arranged orthogonally on the sheet metal and fed at one point by EM coupling. As a result, the direction perpendicular to the ground conductor plate 10 ( The maximum gain of Eθ and Eφ components is ensured at θ = 0 ° and 180 °, and the dual-polarized transmission / reception antenna 1 is obtained. Further, both polarization transmitting / receiving antennas 1 have very good characteristics with radiation efficiency of slightly over 95%.

FIG. 2 is an explanatory diagram showing the return loss characteristics of the dual-polarized transmission / reception antenna 1.
In addition, as shown in FIG. 1, the characteristics of the dual-polarized transmission / reception antenna 1 described below are as follows. The length directions of the side 11 and the side 12 of the ground conductor plate 10 are the Y axis and the X axis, respectively. The direction orthogonal to the conductor plate 10 will be described as the Z-axis direction.
As shown in the return loss characteristic diagram of FIG. 2, in both polarization transmitting / receiving antennas 1, the resonance point is one point A indicated by an arrow, which indicates that the resonance frequencies of the two antennas are equal.

FIG. 3 is an explanatory diagram showing the directivity characteristics of the dual-polarized transmission / reception antenna 1.
FIG. 3 shows that at a resonance frequency of 2.44 GHz, (a) is the Z-X plane (φ = 0 °), (b) is the Z-Y plane (φ = 90 °), and (c) is the XY plane. The directivity characteristic of the surface (θ = 90 °) is shown.

As shown in the directivity characteristics of FIGS. 3A and 3B, according to the dual-polarized transmission / reception antenna 1 of the present embodiment, as indicated by the regions B to D surrounded by dotted lines, ± Z By having the maximum radiation direction of both horizontal / vertical polarized waves in the direction (direction perpendicular to the ground conductor plate 10), it is possible to simultaneously transmit and receive two polarized waves of vertical polarization and horizontal polarization in the same frequency band.
From the directivity characteristics (XY plane) shown in FIG. 3C, it can be said that one polarization has a substantially uniform characteristic.
In addition, as shown in the lower part of FIG. 3 (c), the dual-polarized transmission / reception antenna 1 of the present embodiment ensures high efficiency of radiation efficiency = 95.4%.

FIG. 4 is an explanatory diagram showing the distribution state of the surface current density (2.44 GHz) in the ground conductor plate 10 of the dual-polarized transmission / reception antenna 1.
As shown in FIG. 4, the surface current density in a specific phase generated in the ground conductor plate 10 is merely that the high-frequency current is applied to the edge (near the outer periphery) of the ground conductor plate 10. This is the same in any phase including other phases not shown.
That is, according to the dual-polarized transmission / reception antenna 1 of the present embodiment, the high-frequency current does not get on the central portion of the ground conductor plate 10.
Therefore, when the length of one side of the ground conductor plate 10 is L, it is possible to cut out the central L / 2 or 3L / 5 square range, or the range of the vicinity thereof. Thereby, it is possible to reduce the weight of both the polarization transmitting / receiving antennas 1.
Further, since the high frequency current is not applied to the central region of the ground conductor plate 10, an electronic circuit or the like can be disposed in the region. It is also possible to cut out the central region as described above and arrange an electronic circuit or the like in the cutout region.

As described above, according to the dual-polarized transmission / reception antenna 1 of the present embodiment, the opposite sides formed at substantially the same resonance frequency so as to face the two orthogonal sides 11 and 12 of the ground conductor plate 10. The F antenna 20 and the dipole antenna 30 are disposed so as to be substantially orthogonal.
Then, the EM power feeding portion 41 of the common power feeding portion 40 is disposed opposite to the open end side of the inverted F antenna 20 and the open end side of the dipole antenna 30, so that electromagnetic power feeding to both antennas 20 and 30 is performed. Is performed at one point.
As described above, in the dual polarization transmission / reception antenna 1 of the present embodiment, by adopting the one-point feeding method by EM feeding, the feeding section and the high frequency circuit can be simplified, and the vertically polarized wave can be obtained with a simpler configuration. Thus, a dual-polarized transmission / reception antenna capable of transmitting and receiving horizontal polarization is obtained.
In addition, by using an inverted F antenna as the first linear antenna, both polarization transmitting and receiving antennas can be miniaturized, and the center portion of the ground conductor plate can be cut off or an electronic circuit can be provided.

FIG. 5 is an explanatory diagram showing the arrangement of the polarization transmitting / receiving antennas 1 and the switching of the polarization.
Except for FIG. 9A, the drawings in FIG. 5 and the following drawings are simplified because they illustrate the shape and arrangement of each antenna.
FIG. 5A is the same as the dual-polarized transmission / reception antenna 1 described in FIG. 1, and shows a dual-polarization transmission / reception antenna 1 serving as a reference.
Even when the both-polarized transmission / reception antennas 1 in FIG. 5 (a) are arranged symmetrically in FIG. 5 (b) in the left-right symmetry (the front and back are reversed with respect to the longitudinal center axis), FIG. ) Are arranged symmetrically (inverted with respect to the horizontal central axis), and operate similarly as both polarized wave transmitting / receiving antennas. That is, even if it arrange | positions with which direction with respect to the ground conductor board 10, it can be used as a dual polarized-wave transmission / reception antenna of a Z-axis direction with respect to arrangement | positioning.

Next, a modified example of the dual polarization transmitting / receiving antenna 1 will be described.
FIG. 6 shows a configuration of a modified example of the dual-polarized transmission / reception antenna 1.
FIG. 6A shows two sets of the dual-polarized transmission / reception antennas 1 described in FIG. 1 arranged in point symmetry (on the opposite side).
That is, with respect to one ground conductor plate 10, the first dual polarized wave transmitting / receiving antenna 1a including the inverted F antenna 20a, the dipole antenna 30a, and the feeding portion 40a, the inverted F antenna 20b, the dipole antenna 30b, and the feeding portion 40b are provided. Two sets of the second polarized wave transmitting / receiving antennas 1b are arranged point-symmetrically.
According to this modification, the resonance frequency (for example, 2.44 GHz) of both the polarization transmitting / receiving antennas 1a and 1b is made common, thereby gain compared with the both polarization transmitting / receiving antenna 1 described in the embodiment. Can be improved.
On the other hand, by using the first dual-polarized transmission / reception antenna 1a and the second dual-polarization transmission / reception antenna 1b as antennas of different frequency bands, a dual-frequency dual-polarization transmission / reception antenna can be provided. . For example, the first dual-polarized transmission / reception antenna 1a is set to the 2.44 GHz band, and the second dual-polarization transmission / reception antenna 1b is set to the 5.2 GHz band.

  When two sets of both polarization transmitting / receiving antennas are arranged as shown in FIG. 6 (b), the vertically polarized waves and the horizontally polarized waves cancel each other. If two sets are fed at different timings by switching or the like, both polarization transmission / reception becomes possible. Moreover, if the element dimensions of 20a and 30a, 20b and 30b are controlled and the respective resonance frequencies are changed, it is possible to construct an antenna system that realizes dual-polarized transmission / reception for both frequencies.

FIG. 7 shows modified examples in which other types of antennas are combined.
As the first linear antenna and the second linear antenna, any one of an inverted F antenna, an inverted L antenna, and a dipole antenna can be selected, and the selectable combinations are shown in FIG. In the drawings, the inverted F antenna and the inverted L antenna are simply expressed as inverted F and inverted L, and the dipole antenna is simply expressed as a dipole.
FIGS. 7A to 7C show the arrangement of λ / 4 type antennas as the first linear antenna and the second linear antenna.
FIG. 7A shows an inverted F + inverted F dual-polarized transmission / reception antenna in which two inverted F antennas are arranged so that the open end side is on the same corner side of the ground conductor plate 10.
As for the inverted F antenna, the open end side is bent so as to face the EM power feeding portion 41, similarly to the bent portion 32 of the dipole antenna 30 described in FIG. The same applies to the bending of the open end side of one of the antennas so as to oppose the EM power feeding portion 41 in FIGS. 7B to 7E.

FIG. 7B is an example of an inverted F + inverted L type dual-polarized transmission / reception antenna in which an inverted L antenna is arranged instead of the dipole antenna 30 of the embodiment. Also in this example, the feeding portion 40 side is bent with the open end side, and a short-circuit portion is provided on the opposite side.
FIG. 7C shows an inverted L + inverted L type dual-polarized transmission / reception antenna in which both the inverted F antenna 20 and the dipole antenna 30 of the embodiment are replaced with an inverted L antenna.
In each of FIGS. 7A to 7C, each of the short-circuit portions of both antennas is arranged diagonally with respect to the ground conductor plate 10.

  FIG. 7D is an example of an inverted L + dipole dual-polarized transmission / reception antenna in which an inverted L antenna is arranged instead of the inverted F antenna 20 of the embodiment. In this modification, λ / 4 type and λ / 2 type antennas are used as in the embodiment.

It should be noted that both of the polarization transmitting / receiving antennas according to the modifications described in FIGS. 7A to 7D use λ / 4 type antennas (inverted F antenna and inverted L antenna). The ground conductor plate 10 is required.
Further, as described with reference to FIG. 4 for the dual-polarized transmission / reception antenna 1 of the embodiment, a high-frequency current is also applied to the central portion of the ground conductor plate 10 in each modified example of FIGS. Never ride. Therefore, also in these modified examples, the central portion of the ground conductor plate 10 can be cut out or an electronic circuit can be provided.

FIG. 7E shows an example of a dipole + dipole type dual polarization transmitting / receiving antenna in which a dipole antenna is arranged instead of the inverted F antenna 20 of the embodiment.
According to this modification, since both are λ / 2 type antennas, the ground conductor plate 10 is not required, and a light dual-polarized transmission / reception antenna can be obtained.

As described above, the dual-polarized transmission / reception antennas of the respective modifications shown in FIGS. 7A to 7E have been described. However, as described with reference to FIG. 5, any arrangement can be selected.
Further, as described in FIG. 6 and its modification (multi-frequency), both the first dual-polarized transmission / reception antenna 1a and the second dual-polarization transmission / reception antenna 1b are shown in FIGS. 7 (a) to (e). It is also possible to select any one of them.

FIG. 8 is an explanatory diagram of a modified example in which the shape of the power feeding portion is changed in both polarization transmitting / receiving antennas.
In the dual-polarized transmission / reception antenna 1 of the embodiment described with reference to FIG. 1, the antenna main portion 21 of the inverted F antenna 20 and the bent portion 32 of the dipole antenna 30 are arranged on substantially the same straight line. A case has been described in which the EM feed portion 41 is disposed opposite to the open ends of both antennas.
In FIG. 8A, the open end side of the dipole antenna 30c (second linear antenna) is not bent, and only the linear antenna main portion 31c is configured, and the EM power feeding portion 41c is bent instead. Thus, the dipole antenna 30c is disposed opposite to the open end.
In FIG. 8B, the antenna main portion 21 of the inverted F antenna 20 and the bent portion 32 of the dipole antenna 30d are not arranged on the same line but are arranged in parallel at a predetermined interval, and at the predetermined interval. The EM power feeding part 41d is arranged inside. Accordingly, in the example of FIG. 8, when the side facing the ground conductor plate 10 of the EM power feeding portion 41d is the inside and the opposite side is the outside, the antenna main portion 21 of the inverted F antenna 20 is outside the EM feeding portion 41d. The bent portion of the dipole antenna 30d faces the inside of the EM power feeding portion 41d.
In addition, about the shape of the open end side of both antennas (a 1st linear antenna and a 2nd linear antenna) shown in FIG. 8 (a), (b), and the shape and arrangement | positioning of EM electric power feeding part, FIG. The same can be applied to each of the modified examples described in FIG. 7 and the modified examples described later.

FIG. 9 is an explanatory diagram showing the configuration of another modified example of the dual-polarized transmission / reception antenna 1.
FIG. 9A shows a modified example of the dual-polarized transmission / reception antenna in which the inverted F antenna 20, the dipole antenna 30, and the power feeding unit 40 have a three-dimensional structure.
As shown in FIG. 9A, the first short circuit portion 22e and the second short circuit portion 23e of the inverted F antenna 20e connected to the ground conductor plate 10 are bent at a right angle with respect to the ground conductor plate 10, thereby 1 on the ZY plane.
As for the dipole antenna 30e, as described above, the central portion where the voltage is zero or the vicinity thereof is connected by the short-circuit portion 33e, and the short-circuit portion 33e is bent at a right angle with respect to the ground conductor plate 10, thereby It is formed on a plane.
Corresponding to the fact that the inverted F antenna 20e and the dipole antenna 30e are bent in a right angle direction, the feed line 42e has a three-dimensional structure so as to be orthogonal to the ground conductor plate 10 in the same manner. It is formed on the -Y plane.
The bent portion 32e of the dipole antenna 30e has a shorter length than the embodiment described with reference to FIG. 1 due to the three-dimensional structure. Corresponding to the shortening of the bent portion 32e, the end portion 43e on the dipole antenna 30e side of the EM feed portion 41e is connected to the side so that the length of the dipole antenna 30e facing the EM feed portion 41e is not shortened. 12 (see FIG. 1).
According to the modification shown in FIG. 9A, it is possible to reduce the arrangement area of the entire antenna for both polarization transmission and reception.

On the other hand, in the modified example of FIG. 9B, a second dual-polarized transmission / reception antenna is reversely arranged on the outer side of the inverted F antenna 20 and the dipole antenna 30 of the dual-polarization transmission / reception antenna 1 described in FIG. An L antenna 50 and a dipole antenna 60 are provided.
As illustrated in FIG. 9B, the inverted L antenna 50 forms a short-circuit portion (a feeding line portion in a general inverted-L antenna) on an extension line of the second short-circuit portion 23 of the inverted F antenna 20.
In addition, about the electric power feeding part 40, it feeds electromagnetically in common with two sets of both polarized-wave transmission / reception antennas.
According to this modification, it is possible to provide a multi-frequency dual-polarized transmission / reception antenna.

As described above, the dual-polarized transmission / reception antenna 1 of the present embodiment and the modified examples thereof have been described, but various modifications can be made.
For example, you may make it form each demonstrated both polarized-wave transmission / reception antenna on a board | substrate with a high dielectric constant, such as a glass epoxy resin. This makes it possible to provide a dual-polarized transmission / reception antenna that is reduced in size at the same wavelength (same resonance frequency) by utilizing the fact that the wavelength when the same size is used as a reference is shortened.

In the embodiment and the modification described above, the single-layer dual-polarized transmission / reception antenna has been described. However, both the embodiment and the modification described above on the high relative dielectric constant substrate such as glass epoxy resin are used. When a pair of antennas for polarization transmission / reception is a single antenna layer, the antenna layer may be multilayered (for example, two layers, four layers, eight layers).
In this case, the respective parts of the ground conductor plate 10, the inverted F antenna 20, the dipole antenna 30, and the power feeding unit 40 in the dual-polarized transmission / reception antennas of each layer are connected to each other via. However, the power supply line 42 of the power supply unit 40 may have a single layer and may be connected to the EM power supply unit 41 of any one layer.
In the case of multi-layering, by omitting the lowermost high relative dielectric constant substrate, the antenna is made of n layers, and the high relative dielectric constant substrate is made of n-1 layers. You may arrange | position so that an antenna layer may come to both the outer side surfaces.

In the described embodiments and modifications, the antenna element shape in a straight state is described except for the open end. However, the shape is not limited to the linear shape.
For example, a meander shape, a helical shape, or a bent end shape (a bent end shape) can be used.

DESCRIPTION OF SYMBOLS 1 Both-polarized wave transmission / reception antenna 10 Ground conductor plate 11, 12 edge | side 20 Reverse F antenna 21 Antenna main part 22 1st short circuit part 23 2nd short circuit part 30 Dipole antenna 31 Antenna main part 32 Bending part 40 Feed part 41 EM feed part 42 Power supply line

Claims (9)

A first linear antenna having at least one open end;
At least one open end, and the open end side and the open end side of the first linear antenna are arranged at a predetermined interval and substantially orthogonal to the first linear antenna, and the first linear shape A second linear antenna formed at a resonance frequency substantially the same as the resonance frequency of the antenna;
The first linear antenna and the second linear antenna are disposed opposite to each of the open end side of the first linear antenna and the open end side of the second linear antenna at a predetermined interval. An EM feeder that is electromagnetically connected to the linear antenna;
A power feed line that is electrically connected to the EM power feed unit and feeds power to the first linear antenna and the second linear antenna through the EM power feed unit;
A dual-polarized transmission / reception antenna comprising: A ground conductor plate,
The first linear antenna is disposed substantially parallel to an end surface of the ground conductor plate, and has an antenna main portion whose open end side is disposed opposite to the EM feeding portion, and the antenna main portion opposite to the open end side. The 1st short circuit part which short-circuits a side edge part and the said ground conductor board, and the 2nd short circuit which short-circuits the said antenna main part and the said ground conductor board in the open side rather than the said 1st short circuit part of the said antenna main part. And
An inverted F antenna having
The dual-polarized transmission / reception antenna according to claim 1. A ground conductor plate,
The first linear antenna is disposed substantially parallel to an end surface of the ground conductor plate, and has an antenna main portion whose open end side is disposed opposite to the EM feeding portion, and the antenna main portion opposite to the open end side. A reverse L antenna having a first short-circuit portion that short-circuits a side end portion and the ground conductor plate.
The dual-polarized transmission / reception antenna according to claim 1. The first linear antenna is a dipole antenna;
The dual-polarized transmission / reception antenna according to any one of claims 1 to 3, wherein The second linear antenna is a dipole antenna, an inverted F antenna, or an inverted L antenna.
The dual-polarized transmission / reception antenna according to any one of claims 1 to 4, wherein the antenna is a dual-polarized transmission / reception antenna. The resonance frequency f of both the polarization transmitting / receiving antennas is f = 2.44 GHz.
The dual-polarized transmission / reception antenna according to any one of claims 1 to 5, wherein the antenna is a dual-polarization transmission / reception antenna. Equipped with a high dielectric substrate,
The first linear antenna and the second linear antenna are formed on the high relative dielectric substrate,
The dual-polarized transmission / reception antenna according to any one of claims 1 to 6, wherein the antenna is a dual-polarization transmission / reception antenna. Each of the first linear antenna, the second linear antenna, and the EM feeder is formed of a plurality of layers that are connected to each other via.
The dual-polarized transmission / reception antenna according to any one of claims 1 to 7, wherein the antenna is a dual-polarized transmission / reception antenna. In the first linear antenna and the second linear antenna, the shape of the antenna element portion is a linear shape, a meander shape, a helical shape, or a bent end shape,
The dual-polarized transmission / reception antenna according to any one of claims 1 to 8, wherein the antenna is a dual-polarization transmission / reception antenna.

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