WO2020090838A1

WO2020090838A1 - Antenna, array antenna, wireless communication module, and wireless communication device

Info

Publication number: WO2020090838A1
Application number: PCT/JP2019/042426
Authority: WO
Inventors: 吉川　博道; 信樹平松; 正道米原
Original assignee: 京セラ株式会社
Priority date: 2018-11-02
Filing date: 2019-10-29
Publication date: 2020-05-07

Abstract

The present disclosure provides a novel antenna, array antenna, wireless communication module, and wireless communication device. An antenna as one example of a plurality of embodiments of the present disclosure comprises a radiation conductor, a ground conductor, a first power supply line, a second power supply line, a third power supply line, a fourth power supply line, a first power supply circuit, and a second power supply circuit. Each of the first power supply line through the fourth power supply line is configured to be electromagnetically connected to the radiation conductor. The first power supply circuit is configured to supply mutually opposite anti-phase signals to the first power supply line and the third power supply line. The second power supply circuit is configured to supply mutually opposite anti-phase signals to the second power supply line and the fourth power supply line. The radiation conductor is configured to be excited in a first direction by power being supplied from the first power supply line and the third power supply line. The radiation conductor is configured to be excited in a second direction by power being supplied from the second power supply line and the fourth power supply line.

Description

Antennas, array antennas, wireless communication modules, and wireless communication devices

Cross-reference of related applications

This application claims the priority of Japanese Patent Application No. 2018-207477 filed in Japan on November 2, 2018 and Japanese Patent Application No. 2019-148850 filed in Japan on August 14, 2019. The entire disclosures of these earlier applications are hereby incorporated by reference.

The present disclosure relates to an antenna, an array antenna, a wireless communication module, and a wireless communication device.

▽ Isolation cannot be secured if the two antennas are brought close to each other. There is a technique of separating two antennas and inserting a structure between them in order to ensure the isolation of the antennas. Such a technique is described in Patent Document 1, for example.

JP, 2016-105583, A

An antenna, which is an example of a plurality of embodiments of the present disclosure, includes a radiation conductor, a ground conductor, a first feeding line, a second feeding line, a third feeding line, a fourth feeding line, and a first feeding circuit. And a second power supply circuit. The first power supply line is configured to be electromagnetically connected to the radiation conductor. The second power supply line is configured to be electromagnetically connected to the radiation conductor. The third power supply line is configured to be electromagnetically connected to the radiation conductor. The fourth power supply line is configured to be electromagnetically connected to the radiation conductor. The first feeding circuit is configured to feed opposite-phase signals having opposite phases to the first feeding line and the third feeding line. The second feeding circuit is configured to feed opposite-phase signals having opposite phases to the second feeding line and the fourth feeding line. The radiation conductor is configured to be excited in the first direction by power feeding from the first power feeding line and the third power feeding line. The radiation conductor is configured to be excited in the second direction by power feeding from the second power feeding line and the fourth power feeding line. The third power supply line is located on the opposite side of the first power supply line in the first direction when viewed from the center of the radiation conductor. The fourth power supply line is located on the opposite side of the second power supply line in the second direction when viewed from the center of the radiation conductor.

An array antenna, which is an example of a plurality of embodiments of the present disclosure, includes a plurality of antenna elements that are the above antennas. The plurality of antenna elements are arranged in the first direction.

A wireless communication module that is an example of a plurality of embodiments of the present disclosure includes an antenna element that is the above-described antenna and a drive circuit. The drive circuit is configured to be directly or indirectly connected to each of the first power supply circuit and the second power supply circuit.

A wireless communication module, which is an example of a plurality of embodiments of the present disclosure, includes the array antenna described above and a drive circuit. The drive circuit is configured to be directly or indirectly connected to each of the first power supply circuit and the second power supply circuit.

A wireless communication device that is an example of a plurality of embodiments of the present disclosure includes the above-described wireless communication module and a battery. The battery is configured to drive the drive circuit.

FIG. 1 is a perspective view showing an embodiment of an antenna. FIG. 2 is a sectional view showing an embodiment of the antenna. FIG. 3 is a block diagram showing an embodiment of the antenna. FIG. 4 is a plan view showing an embodiment of the radiation conductor. FIG. 5 is a perspective view showing an embodiment of the antenna. FIG. 6 is a cross-sectional view of the antenna taken along the line L1-L1 shown in FIG. FIG. 7 is a perspective view in which a part of the antenna shown in FIG. 5 is disassembled. FIG. 8 is a block diagram of the antenna shown in FIG. FIG. 9 is a plan view illustrating the configuration of the radiation conductor shown in FIG. FIG. 10 is a plan view showing an embodiment of the antenna. FIG. 11 is a perspective view in which a part of the antenna shown in FIG. 10 is disassembled. FIG. 12 is a perspective view showing an embodiment of the antenna. FIG. 13 is a perspective view in which a part of the circuit board shown in FIG. 12 is disassembled. FIG. 14 is a cross-sectional view of the circuit board taken along line L2-L2 shown in FIG. FIG. 15 is a plan view illustrating the configuration of the radiation conductor shown in FIG. FIG. 16 is a plan view showing an embodiment of the array antenna. FIG. 17 is a plan view showing an embodiment of the wireless communication module. FIG. 18 is a plan view showing an embodiment of the wireless communication device. FIG. 19 is a plan view showing an embodiment of a wireless communication system.

According to the conventional technology, since the structure is inserted, the structure of the antenna becomes large.

The present disclosure relates to providing a new antenna, an array antenna, a wireless communication module, and a wireless communication device.

According to the present disclosure, a new antenna, array antenna, wireless communication module, and wireless communication device can be provided.

A plurality of embodiments of the present disclosure will be described below. In each of the drawings, the same constituents are given the same reference numerals.

As shown in FIGS. 1 and 2, the antenna 10 includes a base body 20, a radiation conductor 30, a ground conductor 40, a power supply line 50, and a circuit board 60. The base body 20 contacts the radiation conductor 30, the ground conductor 40, and the power supply line 50. The radiation conductor 30, the ground conductor 40, and the feed line 50 are configured to function as the antenna element 11. The antenna 10 oscillates at a predetermined resonance frequency and radiates an electromagnetic wave.

The base body 20 may include either a ceramic material or a resin material as a composition. Ceramic materials include aluminum oxide sintered bodies, aluminum nitride sintered bodies, mullite sintered bodies, glass ceramic sintered bodies, crystallized glass obtained by precipitating crystal components in a glass base material, and mica or titanic acid. It includes a microcrystalline sintered body such as aluminum. The resin material includes a material obtained by curing an uncured material such as an epoxy resin, a polyester resin, a polyimide resin, a polyamideimide resin, a polyetherimide resin, and a liquid crystal polymer.

The radiation conductor 30 and the ground conductor 40 may include any of a metal material, an alloy of a metal material, a cured product of a metal paste, and a conductive polymer as a composition. The radiating conductor 30 and the ground conductor 40 may all include the same material. The radiating conductor 30 and the ground conductor 40 may all include different materials. Any combination of radiating conductor 30 and ground conductor 40 may include the same material. The metal material includes copper, silver, palladium, gold, platinum, aluminum, chromium, nickel, cadmium lead, selenium, manganese, tin, vanadium, lithium, cobalt, titanium, and the like. The alloy includes a plurality of metallic materials. The metal paste agent includes a powder of a metal material kneaded together with an organic solvent and a binder. The binder includes epoxy resin, polyester resin, polyimide resin, polyamideimide resin, and polyetherimide resin. Conductive polymers include polythiophene-based polymers, polyacetylene-based polymers, polyaniline-based polymers, polypyrrole-based polymers, and the like.

The radiation conductor 30 is configured to function as a resonator. The radiation conductor 30 may be configured as a patch type resonator. In one example, the radiation conductor 30 is located on the base body 20. In one example, the radiation conductor 30 is located at the end of the base body 20 in the z direction. In one example, the radiating conductor 30 may be located within the substrate 20. A part of the radiation conductor 30 may be located inside the base body 20. The other part of the radiation conductor 30 may be located outside the base body 20. A part of the surface of the radiation conductor 30 may face the outside of the base body 20.

In one example of the embodiments, the radiation conductor 30 extends along the first plane. The ends of the radiation conductor 30 are along the first direction and the second direction. In the present embodiment, the first direction is shown as the y direction. In the present embodiment, the second direction (third axis) is shown as the x direction. In this embodiment, the first direction is orthogonal to the second direction. However, in the present disclosure, the first direction does not have to be orthogonal to the second direction. In the present disclosure, the first direction may intersect with the second direction. In the present embodiment, the third direction (second axis) is shown as the z direction. In the present embodiment, the third direction is orthogonal to the first direction and the second direction. However, in the present disclosure, the third direction does not have to be orthogonal to the first direction and the second direction. In the present disclosure, the third direction may intersect with the first direction and the second direction. In this embodiment, the first plane is shown as an xy plane. In the present embodiment, the second plane is shown as the yz plane. In the present embodiment, the third plane is shown as the zx plane. These planes are planes in the coordinate space and do not indicate a specific surface (plate) or a specific surface (surface). In the present disclosure, the area (surface integral) in the xy plane may be referred to as the first area. In the present disclosure, the area on the yz plane may be referred to as the second area. In the present disclosure, the area in the zx plane may be referred to as the third area. Area (surface integral) is counted in units such as square meters. In the present disclosure, the length in the x direction may be simply referred to as “length”. In the present disclosure, the length in the y direction may be simply referred to as “width”. In the present disclosure, the length in the z direction may be simply referred to as “height”.

As shown in FIG. 4, the radiation conductor 30 includes a center O. The center O is the center of the radiation conductor 30 in both the x direction and the y direction. The radiation conductor 30 may include a first symmetry axis S1 extending along the xy plane. The first axis of symmetry S1 passes through the center O and extends in a direction intersecting the x direction and the y direction. The first symmetry axis S1 may extend along a direction inclined by 45 degrees from the positive direction of the y-axis toward the negative direction of the x-axis. The radiation conductor 30 may include a second axis of symmetry S2 extending along the xy plane. The second axis of symmetry S2 passes through the center O and extends in a direction intersecting with the first axis of symmetry S1.
The second axis of symmetry S2 may extend along a direction inclined by 45 degrees from the positive direction of the y-axis toward the positive direction of the x-axis. The radiation conductor 30 may be one-half the size of the operating wavelength. The operating wavelength is the wavelength of the electromagnetic wave at the operating frequency of the antenna 10. The operating wavelength may be the same as the wavelength of the resonance frequency of the antenna 10. The operating wavelength may be different than the wavelength of the resonant frequency of the antenna 10. For example, the length of the radiation conductor 30 in the x direction and the length of the radiation conductor 30 in the y direction may be one half of the operating wavelength.

In one example of multiple embodiments, the ground conductor 40 may be configured to function as the ground in the antenna element 11. In one example of embodiments, the ground conductor 40 extends along the xy plane. As shown in FIG. 2, the ground conductor 40 faces the radiation conductor 30 in the z direction.

The power supply line 50 may be configured to supply an electric signal from the outside to the antenna element 11. The power supply line 50 can be configured to supply an electric signal from the antenna element 11 to the outside. The power supply line 50 may be a through-hole conductor, a via conductor, or the like. The power supply line 50 may include a first power supply line 51, a second power supply line 52, a third power supply line 53, and a fourth power supply line 54, as shown in FIG. 1.

Each of the first feeder line 51, the second feeder line 52, the third feeder line 53, and the fourth feeder line 54 is configured to be electrically connected to the radiation conductor 30. However, in the present disclosure, each of the first power supply line 51 to the fourth power supply line 54 may be configured to be electromagnetically connected to the radiation conductor 30. In the present disclosure, "electromagnetic connection" includes electrical connection and magnetic connection. As shown in FIG. 4, the first feeding line 51, the second feeding line 52, the third feeding line 53, and the fourth feeding line 54 are respectively connected to the radiation conductor 30 at a feeding point 51A and a feeding point 52A. , Feeding point 53A, and feeding point 54A, respectively. Each of the first power supply line 51, the second power supply line 52, the third power supply line 53, and the fourth power supply line 54 contacts different positions of the radiation conductor 30. The ground conductor 40 has a plurality of openings 40a, as shown in FIG. Each of the first feeder line 51, the second feeder line 52, the third feeder line 53, and the fourth feeder line 54 communicates with the outside via the opening 40a of the ground conductor 40. Each of the first feeder line 51 to the fourth feeder line 54 may extend along the z direction.

The first power supply line 51 is configured to at least contribute to the supply of an electric signal to the outside when the radiation conductor 30 resonates in the y direction. The second power supply line 52 is configured to at least contribute to the supply of an electric signal to the outside when the radiation conductor 30 resonates in the x direction. The third feeder 53 is configured to at least contribute to the supply of an electric signal to the outside when the radiation conductor 30 resonates in the y direction. The fourth feeder 54 is configured to at least contribute to the supply of an electric signal to the outside when the radiation conductor 30 resonates in the x direction.

The first power supply line 51 and the third power supply line 53, and the second power supply line 52 and the fourth power supply line 54 are configured to excite the radiation conductor 30 in different directions. For example, the first power supply line 51 and the third power supply line 53 are configured to excite the radiation conductor 30 in the y direction. The second feeder line 52 and the fourth feeder line 54 are configured to excite the radiation conductor 30 in the x direction. Since the antenna 10 has the feed line 50, it is possible to reduce the excitation of the radiation conductor 30 to the other side when the radiation conductor 30 is excited to the one side.

The first feeding line 51 and the third feeding line 53 are configured to excite the radiation conductor 30 with a differential voltage. The second feeder line 52 and the fourth feeder line 54 are configured to excite the radiation conductor 30 with a differential voltage. By exciting the radiation conductor 30 with a differential voltage, the antenna 10 can reduce fluctuation of the potential center when the radiation conductor 30 is excited from the center O of the radiation conductor 30.

As shown in FIG. 4, in the radiation conductor 30, the center O may be located between the first power feeding line 51 and the third power feeding line 53. The third power supply line 53 is located on the substantially opposite side to the first power supply line 51 in the y direction when viewed from the center O of the radiation conductor 30. The first distance d1 between the first power supply line 51 and the center O is substantially equal to the third distance d3 between the third power supply line 53 and the center O.

As shown in FIG. 4, in the radiation conductor 30, the center O may be located between the second power feeding line 52 and the fourth power feeding line 54. The fourth power supply line 54 is located substantially opposite to the second power supply line 52 in the x direction when viewed from the center O of the radiation conductor 30. The second distance d2 between the second power supply line 52 and the center O is substantially equal to the fourth distance d4 between the fourth power supply line 54 and the center O. The second distance d2 may be substantially equal to the first distance d1. The second distance d2 may be different from the first distance d1.

The first power supply line 51 and the second power supply line 52 may have symmetry with the first axis of symmetry S1 interposed therebetween. The third feeder line 53 and the fourth feeder line 54 may have symmetry with the first axis of symmetry S1 interposed therebetween. For example, the feeding point 51A and the feeding point 52A may be line-symmetric with respect to the first axis of symmetry S1. For example, the feeding point 53A and the feeding point 54A may be line-symmetric with respect to the first axis of symmetry S1. The first feeder line 51 and the fourth feeder line 54 may have symmetry with respect to the second axis of symmetry S2. The second power supply line 52 and the third power supply line 53 may have symmetry with the second axis of symmetry S2 interposed therebetween. For example, the feeding point 51A and the feeding point 54A may be line-symmetric with respect to the second axis of symmetry S2. For example, the feeding point 52A and the feeding point 53A may be line-symmetric with respect to the second axis of symmetry S2.

The direction connecting the first power supply line 51 and the third power supply line 53 is inclined with respect to the y direction. By arranging the first power supply line 51 and the third power supply line 53 so as to be inclined with respect to the y direction, the first power supply line 51 and the third power supply line 53 can excite the radiation conductor 30 also in the x direction. The direction connecting the second power supply line 52 and the fourth power supply line 54 is inclined with respect to the x direction. By arranging the second power supply line 52 and the fourth power supply line 54 so as to be inclined with respect to the x direction, the second power supply line 52 and the fourth power supply line 54 can excite the radiation conductor 30 also in the y direction. The combination of the first power supply line 51 and the third power supply line 53 and the combination of the second power supply line 52 and the fourth power supply line 54 can excite the radiation conductor 30 in two excitation directions. The antenna 10 excites the radiation conductor 30 in two excitation directions, so that the impedance component in each direction acts on the feeder line 50. The antenna 10 can reduce the impedance at the time of input by canceling the impedance components in each direction. By reducing the impedance at the time of input, the antenna 10 can improve isolation in two polarization directions.

As shown in FIG. 2, the circuit board 60 includes a ground conductor 60A. As shown in FIG. 3, the circuit board 60 includes a first feeding circuit 61 and a second feeding circuit 62. The circuit board 60 may include one of the first feeding circuit 61 and the second feeding circuit 62.

The ground conductor 60A includes any conductive material. The ground conductor 60A may include the same material as the radiation conductor 30 and the ground conductor 40, or may include a material different from the radiation conductor 30 and the ground conductor 40. Any combination of ground conductor 60A, radiating conductor 30, and ground conductor 40 may include the same material. The ground conductor 60A may be connected to the ground conductor 140. The ground conductor 60A may be integrated with the ground conductor 140.

The first power supply circuit 61 is electrically connected to the first power supply line 51 and the third power supply line 53. The 1st electric power feeding circuit 61 is comprised so that the mutually opposite phase signal may be supplied to the 1st electric power feeding line 51 and the 3rd electric power feeding line 53 in a reverse phase signal. The first power supply signal supplied to the first power supply line 51 has a phase substantially opposite to that of the third power supply signal supplied to the third power supply line 53.

The first feeding circuit 61 includes a first inverting circuit 63. The first inverting circuit 63 can output two electric signals whose phases are opposite to each other, based on the inputted one electric signal. The first inverting circuit 63 may be a circuit that inverts the phase of one input electric signal in the resonance frequency band. The first inverting circuit 63 may be a circuit that outputs, from one input electric signal, negative-phase signals whose phases are substantially opposite to each other. The first inverting circuit 63 may be any one of a balun, a power distribution circuit and a delay line (delay line memory). The first inverting circuit 63 may include an inductance element connected to one of the first power supply line 51 and the third power supply line 53 and a capacitance element connected to the other.

The second power supply circuit 62 is configured to be electrically connected to the second power supply line 52 and the fourth power supply line 54. The second power feeding circuit 62 is configured to supply a negative phase signal whose phases are substantially opposite to each other to the second power feeding line 52 and the fourth power feeding line 54. The second power supply signal supplied to the second power supply line 52 has a phase substantially opposite to that of the fourth power supply signal supplied to the fourth power supply line 54.

The second power feeding circuit 62 includes a second inverting circuit 64. The second inverting circuit 64 can output two electric signals whose phases are opposite to each other, based on the inputted one electric signal. The second inversion circuit 64 may be a circuit that inverts the phase of one input electric signal in the resonance frequency band. The second inverting circuit 64 may be a circuit that outputs, from one input electric signal, negative-phase signals whose phases are substantially opposite to each other. The second inversion circuit 64 may be any one of a balun, a power distribution circuit, and a delay line (delay line memory). The second inverting circuit 64 may include an inductance element connected to one of the second power supply line 52 and the fourth power supply line 54 and a capacitance element connected to the other.

In the antenna 10, electric signals of opposite phases are fed to the first feeding line 51 and the third feeding line 53. In the antenna 10, when the radiation conductor 30 resonates along the y direction, the potential fluctuation near the center O of the radiation conductor 30 becomes small. The antenna 10 is configured to resonate with a node near the center O. In the antenna 10, electric signals of opposite phases are fed to the second feeding line 52 and the fourth feeding line 54. In the antenna 10, when the radiation conductor 30 resonates along the y direction, the potential fluctuation near the center O of the radiation conductor 30 becomes small.

FIG. 5 is a perspective view showing an embodiment of the antenna 110. FIG. 6 is a cross-sectional view of the antenna 110 taken along the line L1-L1 shown in FIG. FIG. 7 is an exploded perspective view of a part of the antenna 110 shown in FIG. FIG. 8 is a block diagram of the antenna 110 shown in FIG. FIG. 9 is a plan view illustrating the configuration of the radiation conductor 130 shown in FIG.

As shown in FIGS. 5 and 6, the antenna 110 includes a base 120, a radiation conductor 130, a ground conductor 140, a first connecting conductor 155, a second connecting conductor 156, a third connecting conductor 157, and a third connecting conductor 157. 4 connection conductors 158 are included. The antenna 110 includes a power supply line 150 and a circuit board 160. The radiation conductor 130, the ground conductor 140, and the feed line 150 function as the antenna element 111. The power supply line 150 includes a first power supply line 151, a second power supply line 152, a third power supply line 153, and a fourth power supply line 154. The number of each of the first connecting conductor 155 to the fourth connecting conductor 158 included in the antenna 110 shown in FIG. 5 is two. However, the number of each of the first connecting conductor 155 to the fourth connecting conductor 158 included in the antenna 110 may be one, or may be three or more.

The antenna element 111 is configured to be able to oscillate at a predetermined resonance frequency. The antenna 110 may be configured to radiate an electromagnetic wave when the antenna element 111 oscillates at a predetermined resonance frequency. The antenna 110 may have at least one of the at least one resonance frequency band of the antenna element 111 as an operating frequency. The antenna 110 can radiate an electromagnetic wave having an operating frequency. The wavelength of the operating frequency may be the operating wavelength that is the wavelength of the electromagnetic wave at the operating frequency of the antenna 110.

The antenna element 111 exhibits an artificial magnetic wall characteristic (Artificial Magnetic Conductor Character), as described later, with respect to an electromagnetic wave of a predetermined frequency that is incident on a plane substantially parallel to the xy plane of the antenna element 111 from the positive direction of the z axis. .. In the present disclosure, “artificial magnetic wall characteristic” means a characteristic of a surface where the phase difference between the incident wave and the reflected wave at the operating frequency is 0 degree. On the surface having the artificial magnetic wall characteristic, the phase difference between the incident wave and the reflected wave is −90 degrees to +90 degrees in the operating frequency band. The operating frequency band includes a resonant frequency and an operating frequency that exhibit artificial magnetic wall characteristics.

Since the antenna element 111 exhibits the above-mentioned artificial magnetic wall characteristic, as shown in FIG. 5, even if the below-described ground conductor 165 of the circuit board 160 is located on the negative side of the z axis of the antenna 110, The radiation efficiency can be maintained.

The base body 120 includes the same or similar material as the base body 20 shown in FIG. The base body 120 contacts the radiation conductor 130, the ground conductor 140, and the power supply line 150. The base body 120 may have a shape corresponding to the shape of the radiation conductor 130. The base body 120 may be a substantially square prism. The base body 120 includes an upper surface 121 and a lower surface 122. Each of the upper surface 121 and the lower surface 122 may be each of an upper surface and a bottom surface of the base body 120 that is a substantially square prism. The upper surface 121 and the lower surface 122 may be substantially parallel to the xy plane. Each of the upper surface 121 and the lower surface 122 may have a substantially square shape. One of the two diagonal lines of the upper surface 121 and the lower surface 122, which are substantially square, runs along the x direction. The other diagonal line of the two diagonal lines is along the y direction. The upper surface 121 is located on the positive side of the z-axis than the lower surface 122.

The radiation conductor 130 is configured to function as a resonator. The radiation conductor 130 includes the same or similar material as the radiation conductor 30 shown in FIG. As shown in FIG. 6, the radiation conductor 130 may be located on the upper surface 121 of the base body 120. The radiation conductor 130 extends along the xy plane. The radiation conductor 130 is configured to capacitively connect the first connecting conductor 155 to the fourth connecting conductor 158. The radiation conductor 130 is surrounded by the first connecting conductor 155 to the fourth connecting conductor 158 on the xy plane.

The radiating conductor 130 can be configured to resonate in the y direction by being supplied with electric signals of mutually opposite phases from the first power feeding line 151 and the third power feeding line 153, for example. When the radiating conductor 130 resonates in the y direction, the first connecting conductor 155 can be seen from the radiating conductor 130 as an electric wall positioned on the negative side of the y axis, and the third connecting conductor 157 can be viewed on the positive side of the y axis. It can be seen as an electric wall located at. When the radiation conductor 130 resonates in the y direction, the positive side of the x axis can be seen as a magnetic wall and the negative side of the x axis can be seen as a magnetic wall from the radiation conductor 130. When the radiating conductor 130 resonates in the y direction, the radiating conductor 130 is surrounded by the two electric walls and the two magnetic walls, so that the antenna 110 is provided with an xy plane included in the antenna 110 from the positive side of the z axis. It can be configured to exhibit artificial magnetic wall characteristics for electromagnetic waves of a predetermined frequency incident on the.

The radiating conductor 130 can be configured to resonate in the x direction by being supplied with electric signals having mutually opposite phases from the second power feeding line 152 and the fourth power feeding line 154, for example. When the radiation conductor 130 resonates in the x direction, the second connection conductor 156 can be seen from the radiation conductor 130 as an electric wall located on the positive side of the x axis, and the fourth connection conductor 158 can be viewed on the negative side of the x axis. It can be seen as an electric wall located at. When the radiation conductor 130 resonates in the x direction, the positive side of the y axis can be seen as a magnetic wall and the negative side of the y axis can be seen as a magnetic wall from the radiation conductor 130. When the radiation conductor 130 resonates in the x direction, the radiation conductor 130 is surrounded by the two electric walls and the two magnetic walls, so that the antenna 110 is provided with an xy plane included in the antenna 110 from the positive side of the z axis. It can be configured to exhibit artificial magnetic wall characteristics with respect to an electromagnetic wave having a predetermined frequency incident on the.

As shown in FIG. 9, the radiation conductor 130 includes a center O1. The center O1 is the center of the radiation conductor 130 in both the x direction and the y direction. The radiation conductor 130 may include a first axis of symmetry T1 extending along the xy plane. The first axis of symmetry T1 passes through the center O1 and extends in a direction intersecting the x direction and the y direction. The first axis of symmetry T1 may extend along a direction inclined by 45 degrees from the positive direction of the y-axis toward the negative direction of the x-axis. The radiation conductor 130 may include a second axis of symmetry T2 extending along the xy plane. The second axis of symmetry T2 passes through the center O1 and extends in a direction intersecting with the first axis of symmetry T1. The second axis of symmetry T2 may extend along a direction inclined by 45 degrees from the positive direction of the y-axis toward the positive direction of the x-axis. The radiation conductor 130 may be one-half the size of the operating wavelength. For example, the length of the radiation conductor 130 in the x direction and the length of the radiation conductor 130 in the y direction may be one half of the operating wavelength.

As shown in FIG. 7, the radiation conductor 130 includes a first conductor 131, a second conductor 132, a third conductor 133, and a fourth conductor 134. The radiation conductor 130 may further include an inner conductor 135. All of the first conductor 131 to the fourth conductor 134, the inner conductor 135, the ground conductor 140, the first feeding line 151 to the fourth feeding line 154, and the first connecting conductor 155 to the fourth connecting conductor 158 include the same material. Or may include different materials. The first conductor 131 to the fourth conductor 134, the inner conductor 135, the ground conductor 140, the first feeding line 151 to the fourth feeding line 154, and the first connecting conductor 155 to the fourth connecting conductor 158 are the same material in any combination. May be included.

Each of the first conductor 131 to the fourth conductor 134 may have, for example, the same shape and a substantially square shape. The two diagonal lines of the substantially square first conductor 131 and the two diagonal lines of the substantially square third conductor 133 are along the x direction and the y direction. The length of the diagonal line of the first conductor 131 along the y direction and the length of the diagonal line of the third conductor 133 along the y direction may be about ¼ of the operating wavelength. Two diagonal lines of the substantially square second conductor 132 and two diagonal lines of the substantially square fourth conductor 134 are along the x direction and the y direction. The length of the diagonal line of the second conductor 132 along the x direction and the length of the diagonal line of the fourth conductor 134 along the x direction may be about a quarter of the operating wavelength.

At least a part of each of the first conductor 131 to the fourth conductor 134 may be exposed to the outside of the base body 120. A part of each of the first conductor 131 to the fourth conductor 134 may be located in the base body 120. The entirety of each of the first conductor 131 to the fourth conductor 134 may be located in the base body 120.

The first conductor 131 to the fourth conductor 134 spread along the upper surface 121 of the base 120. As an example, the first conductor 131 to the fourth conductor 134 may be arranged in a square lattice on the upper surface 121. In this case, the first conductor 131 and the fourth conductor 134, and the second conductor 132 and the third conductor 133 may be arranged along the first symmetry axis T1. The first conductor 131 and the second conductor 132, and the fourth conductor 134 and the third conductor 133 may be arranged along the second axis of symmetry T2. The two diagonal directions of the square lattice in which the first conductor 131 to the fourth conductor 134 are arranged are along the x direction and the y direction. Of the two diagonal directions, the diagonal direction along the y direction is referred to as the first diagonal direction. Of the two diagonal directions, the diagonal direction along the x direction is referred to as the second diagonal direction. The first diagonal direction and the second diagonal direction may intersect at the center O1.

The first conductor 131 to the fourth conductor 134 are spaced apart from each other with a predetermined interval. For example, as shown in FIG. 5, the first conductor 131 and the second conductor 132 are located apart from each other with a space t1. The third conductor 133 and the fourth conductor 134 are located apart from each other with a space t1. The first conductor 131 and the fourth conductor 134 are located apart from each other with a space t2. The second conductor 132 and the third conductor 133 are located apart from each other with a space t2. The first conductor 131 to the fourth conductor 134 are configured to be capacitively connected to each other by being spaced apart from each other by a predetermined distance.

As shown in FIG. 7, the inner conductor 135 faces the first conductors 131 to 134 in the z direction. The inner conductor 135 is located on the negative side of the z-axis with respect to the first conductor 131 to the fourth conductor 134. The inner conductor 135 may be located within the substrate 120, as shown in FIG. However, when the entire first conductor 131 to the fourth conductor 134 are located inside the base body 120, the inner conductor 135 is located on the positive side in the z-axis direction than the first conductor 131 to the fourth conductor 134. You can do it. In this case, at least a part of the inner conductor 135 may be exposed from the upper surface 121 of the base 120.

The inner conductor 135 is configured to capacitively connect each of the first conductor 131 to the fourth conductor 134. For example, a part of the base 120 may be located between the inner conductor 135 and the first conductor 131 to the fourth conductor 134. Since a part of the base body 120 is located between the inner conductor 135 and the first conductor 131 to the fourth conductor 134, the inner conductor 135 capacitively connects each of the first conductor 131 to the fourth conductor 134. Can be configured to. The area of the inner conductor 135 in the xy plane may be appropriately adjusted in consideration of a desired magnitude of capacitive coupling between the first conductor 131 to the fourth conductor 134 and the inner conductor 135. The distance between the first conductor 131 to the fourth conductor 134 and the inner conductor 135 in the z-direction is determined by considering the magnitude of the desired capacitive coupling between the first conductor 131 to the fourth conductor 134 and the inner conductor 135. Therefore, it may be appropriately adjusted.

The inner conductor 135 may be substantially parallel to the xy plane. The inner conductor 135 may have a substantially square shape. The center of the substantially square inner conductor 135 may substantially coincide with the center O1 of the first conductor 131 to the fourth conductor 134. One of the two diagonal lines of the substantially square inner conductor 135 may extend along the first diagonal direction. The other diagonal line of the two diagonal lines of the inner conductor 135 having a substantially square shape may be along the second diagonal direction.

Ground conductor 140 includes the same or similar material as ground conductor 40 shown in FIG. The ground conductor 140 may be configured to function as the ground of the antenna element 111. As shown in FIG. 6, the ground conductor 140 may be configured to be connected to the below-described ground conductor 165 of the circuit board 160. In this case, the ground conductor 140 may be integrated with the ground conductor 165 of the circuit board 160. The ground conductor 140 can be a flat conductor. The ground conductor 140 is located on the lower surface 122 of the base 120.

As shown in FIG. 7, the ground conductor 140 extends along the xy plane. The ground conductor 140 faces the radiation conductor 130 in the z direction. The base body 120 is interposed between the ground conductor 140 and the radiation conductor 130. The ground conductor 140 may have a shape corresponding to the shape of the radiation conductor 130. In the present embodiment, the ground conductor 140 has a substantially square shape corresponding to the radiation conductor 130 having a substantially square shape. However, the ground conductor 140 may have any shape depending on the radiation conductor 130. The ground conductor 140 includes

openings

141, 142, 143, 144. The positions of the openings 141 to 144 on the xy plane may be appropriately adjusted according to the positions of the first feeder line 151 to the fourth feeder line 154 on the xy plane.

The power supply line 150 includes the same or similar material as the power supply line 50 shown in FIG. The power supply line 150 may be a through-hole conductor, a via conductor, or the like. The power supply line 150 is configured to be able to supply the electric signal from the antenna element 111 to the external circuit board 160 or the like. The first feeder line 151 to the fourth feeder line 154 are in contact with different positions of the radiation conductor 130. For example, as shown in FIG. 5, the first power supply line 151 is configured to be electrically connected to the first conductor 131. The second power supply line 152 is configured to be electrically connected to the second conductor 132. The third power supply line 153 is configured to be electrically connected to the third conductor 133. The fourth power supply line 154 is configured to be electrically connected to the fourth conductor 134. However, each of the first feeder line 151 to the fourth feeder line 154 may be configured to be magnetically connected to each of the first conductor 131 to the fourth conductor 134. The points where the first feeder line 151 to the fourth feeder line 154 are connected to the first conductor 131 to the fourth conductor 134 are also described as the feeding point 151A, the feeding point 152A, the feeding point 153A, and the feeding point 154A. To do. As shown in FIG. 6, each of the first power supply line 151 to the fourth power supply line 154 communicates with the outside through each of the openings 141 to 144 of the ground conductor 140. Each of the first feeder line 151 to the fourth feeder line 154 may extend along the z direction.

The first power supply line 151 and the third power supply line 153 are configured to at least contribute to the supply of an electric signal to the outside when the radiation conductor 130 resonates in the y direction. The second feeder line 152 and the fourth feeder line 154 are configured to at least contribute to the supply of an electric signal to the outside when the radiation conductor 130 resonates in the x direction.

The first feeder line 151 and the third feeder line 153, and the second feeder line 152 and the fourth feeder line 154 are configured to excite the radiation conductor 130 in different directions. For example, the first feeder line 151 and the third feeder line 153 are configured to excite the radiation conductor 130 in the y direction. The second feeder line 152 and the fourth feeder line 154 are configured to excite the radiation conductor 130 in the x direction. Since the antenna 110 has the power supply line 150, it is possible to reduce the excitation of the radiation conductor 130 to the other side when the radiation conductor 130 is excited to the one side.

The first feeder line 151 and the third feeder line 153 are configured to excite the radiation conductor 130 with a differential voltage. The second feeder line 152 and the fourth feeder line 154 are configured to excite the radiation conductor 130 with a differential voltage. By exciting the radiation conductor 130 with a differential voltage, the antenna 110 can reduce fluctuation of the potential center when the radiation conductor 130 is excited from the center O1 of the radiation conductor 130.

As shown in FIG. 9, the center O1 of the radiation conductor 130 is located between the first feeder line 151 and the third feeder line 153 in the y direction. The first distance D1 between the first power supply line 151 and the center O1 is substantially equal to the third distance D3 between the third power supply line 153 and the center O1.

As shown in FIG. 9, the center O1 of the radiation conductor 130 is located between the second feeder line 152 and the fourth feeder line 154 in the x direction. The second distance D2 between the second power supply line 152 and the center O1 is substantially equal to the fourth distance D4 between the fourth power supply line 154 and the center O1. In this embodiment, the second distance D2 is substantially equal to the first distance D1. However, the second distance D2 may be different from the first distance D1.

The first power supply line 151 and the second power supply line 152 may have symmetry with respect to the first axis of symmetry T1. The third feeder line 153 and the fourth feeder line 154 may have symmetry with the first axis of symmetry T1 interposed therebetween. For example, the feeding point 151A and the feeding point 152A, and the feeding point 153A and the feeding point 154A may be line-symmetric with respect to the first symmetry axis T1.

The first power supply line 151 and the fourth power supply line 154 may have symmetry with the second axis of symmetry T2 in between. The second power supply line 152 and the third power supply line 153 may have symmetry with the second axis of symmetry T2 interposed therebetween. For example, the feeding point 151A and the feeding point 154A and the feeding point 152A and the feeding point 153A may be line-symmetric with respect to the second axis of symmetry T2.

The direction connecting the first power supply line 151 and the third power supply line 153 is along the y direction. The direction connecting the first power supply line 151 and the third power supply line 153 is along the first diagonal direction. The direction connecting the second power supply line 152 and the fourth power supply line 154 is along the x direction. The direction connecting the second power supply line 152 and the fourth power supply line 154 is along the second diagonal direction. However, as shown in FIG. 15 described later, the direction connecting the first power supply line 151 and the third power supply line 153 may be inclined with respect to the first diagonal direction. The direction connecting the second power supply line 152 and the fourth power supply line 154 may be inclined with respect to the second diagonal direction.

As shown in FIG. 8, the circuit board 160 includes a first feeding circuit 61A and a second feeding circuit 62A. As shown in FIG. 6, the circuit board 160 includes a ground conductor 165.

The first power supply circuit 61A is configured to be electrically connected to the first power supply line 151 and the third power supply line 153. The first feeding circuit 61A includes a first inverting circuit 63, a first wiring 161, and a third wiring 163. In the present embodiment, the first inverting circuit 63 may include an inductance element connected to one of the first feeding line 151 and the third feeding line 153 and a capacitance element connected to the other. 61 A of 1st electric power feeding circuits are comprised so that the mutually opposite phase signal may be supplied to the 1st electric power feeding line 151 and the 3rd electric power feeding line 153. In the antenna 110, electric signals of opposite phases are supplied to the first feeder line 151 and the third feeder line 153. In the antenna 110, when the radiation conductor 130 resonates along the y direction, potential fluctuations near the center O1 of the first conductor 131 to the fourth conductor 134 are reduced. The antenna 110 is configured to resonate with the node near the center O1 as a node when the radiation conductor 130 resonates along the y direction.

The second power supply circuit 62A is configured to be electrically connected to the second power supply line 152 and the fourth power supply line 154. The second power feeding circuit 62A includes a second inverting circuit 64, a second wiring 162, and a fourth wiring 164. In the present embodiment, the second inverting circuit 64 may include an inductance element connected to one of the second feeding line 152 and the fourth feeding line 154 and a capacitance element connected to the other. The second power feeding circuit 62A is configured to supply a negative phase signal whose phases are substantially opposite to each other to the second power feeding line 152 and the fourth power feeding line 154. In the antenna 110, electric signals of opposite phases are supplied to the second power supply line 152 and the fourth power supply line 154. In the antenna 110, when the radiating conductor 130 resonates along the x direction, the potential fluctuation near the center O1 of the first conductor 131 to the fourth conductor 134 becomes small. The antenna 110 is configured to resonate with the node near the center O1 as a node when the radiation conductor 130 resonates along the x direction.

The first wiring 161 to the fourth wiring 164 include any conductive material. The first wiring 161 to the fourth wiring 164 may be formed as a wiring pattern as described later.

As shown in FIG. 8, the first wiring 161 is configured to electrically connect the first inverting circuit 63 and the first power supply line 151. The second wiring 162 is configured to electrically connect the second inverting circuit 64 and the second power supply line 152. The third wiring 163 is configured to electrically connect the first inverting circuit 63 and the third power supply line 153. The fourth wiring 164 is configured to electrically connect the second inverting circuit 64 and the fourth power supply line 154.

The wiring length and width of the first wiring 161 and the wiring length and width of the third wiring 163 may be substantially equal. Since the wiring length and width of the first wiring 161 and the wiring length and width of the third wiring 163 are substantially equal to each other, the impedance of the first wiring 161 and the impedance of the third wiring 163 can be substantially equal to each other.

The wiring length and width of the second wiring 162 and the wiring length and width of the fourth wiring 164 may be substantially equal. Since the wiring length and width of the second wiring 162 and the wiring length and width of the fourth wiring 164 are substantially equal to each other, the impedance of the second wiring 162 and the impedance of the fourth wiring 164 can be substantially equal to each other.

The ground conductor 165 includes any conductive material. The ground conductor 165 may be a conductor layer. The ground conductor 165 is located on the surface located on the positive side of the z-axis of the two surfaces substantially parallel to the xy plane included in the circuit board 160.

FIG. 10 is a plan view showing an embodiment of the antenna 210. FIG. 11 is a perspective view in which a part of the antenna 210 shown in FIG. 10 is disassembled. Hereinafter, the main difference between the antenna 210 shown in FIG. 10 and the antenna 110 shown in FIG. 5 will be described.

As shown in FIGS. 10 and 11, the antenna 210 includes a base body 120, a radiation conductor 230, a ground conductor 140, and first to fourth connection conductors 155 to 158. The antenna 210 includes a first feed line 151, a second feed line 152, a third feed line 153, a fourth feed line 154, and a circuit board 160. The radiating conductor 230, the ground conductor 140, the first connecting conductor 155 to the fourth connecting conductor 158, and the feed line 150 are configured to function as the antenna element 211.

As shown in FIG. 11, the radiation conductor 230 includes a first conductor 131 to a fourth conductor 134 and an inner conductor 235. The inner conductor 235 may include the same or similar material as the inner conductor 135 shown in FIG. 7. The inner conductor 235 includes a first branch portion 235a, a second branch portion 235b, a first inner conductor 236, a second inner conductor 237, a third inner conductor 238, and a fourth inner conductor 239. All of the first branch portion 235a, the second branch portion 235b, the first inner conductor 236, the second inner conductor 237, the third inner conductor 238, and the fourth inner conductor 239 may include the same material, or all of them may include the same material. It may include different materials. Any combination of the first branch portion 235a, the second branch portion 235b, the first inner conductor 236, the second inner conductor 237, the third inner conductor 238, and the fourth inner conductor 239 may include the same material.

The first inner conductor 236 faces the first conductor 131 in the z direction. The first inner conductor 236 is located away from the first conductor 131 in the z direction. The entire first inner conductor 236 may overlap the first conductor 131 in the xy plane. The area of the first inner conductor 236 in the xy plane may be smaller than the area of the first conductor 131 in the xy plane. The first inner conductor 236 is configured to be capacitively connected to the first conductor 131 by interposing a part of the base 120 between the first inner conductor 236 and the first conductor 131. The position of the first inner conductor 236 on the xy plane may be appropriately adjusted according to the position of the first conductor 131 on the xy plane.

The second inner conductor 237 faces the second conductor 132 in the z direction. The second inner conductor 237 is located away from the second conductor 132 in the z direction. The entire second inner conductor 237 may overlap the second conductor 132 in the xy plane. The area of the second inner conductor 237 in the xy plane may be smaller than the area of the second conductor 132 in the xy plane. The second inner conductor 237 is configured to be capacitively connected to the second conductor 132 by interposing a part of the base body 120 with the second conductor 132. The position of the second inner conductor 237 on the xy plane may be appropriately adjusted according to the position of the second conductor 132 on the xy plane.

The third inner conductor 238 faces the third conductor 133 in the z direction. The third inner conductor 238 is located away from the third conductor 133 in the z direction. The entire third inner conductor 238 may overlap the third conductor 133 in the xy plane. The area of the third inner conductor 238 in the xy plane may be smaller than the area of the third conductor 133 in the xy plane. The third inner conductor 238 is configured to be capacitively connected to the third conductor 133 by interposing a part of the base 120 between the third inner conductor 238 and the third conductor 133. The position of the third inner conductor 238 on the xy plane may be appropriately adjusted according to the position of the third conductor 133 on the xy plane.

The fourth inner conductor 239 faces the fourth conductor 134 in the z direction. The fourth inner conductor 239 is located away from the fourth conductor 134 in the z direction. The entire fourth inner conductor 239 may overlap the fourth conductor 134 in the xy plane. The area of the fourth inner conductor 239 in the xy plane may be smaller than the area of the fourth conductor 134 in the xy plane. The fourth inner conductor 239 is configured to be capacitively connected to the fourth conductor 134 by interposing a part of the base 120 between the fourth inner conductor 239 and the fourth conductor 134. The position of the fourth inner conductor 239 on the xy plane may be appropriately adjusted according to the position of the fourth conductor 134 on the xy plane.

Each of the first inner conductor 236 to the fourth inner conductor 239 may have a flat plate shape. Each of the first inner conductor 236 to the fourth inner conductor 239 may be substantially square. However, each of the first inner conductor 236 to the fourth inner conductor 239 is not limited to a square. For example, each of the first inner conductor 236 to the fourth inner conductor 239 may be circular or elliptical. All of the first inner conductor 236 to the fourth inner conductor 239 may have the same shape, and all the first inner conductor 236 to the fourth inner conductor 239 may have different shapes.

The first branch portion 235a is configured to electrically connect the first inner conductor 236 and the third inner conductor 238. One end of the first branch portion 235a is configured to be electrically connected to one of the four corner portions of the first inner conductor 236. The other end of the first branch portion 235a is configured to be electrically connected to one of the four corner portions of the third inner conductor 238. The first branch portion 235a may extend along the direction connecting the first power supply line 151 and the third power supply line 153. The first branch portion 235a may extend along the y direction. The width of the first branch portion 235a in the x direction may be thin enough to maintain mechanical or electrical connection between the first inner conductor 236 and the third inner conductor 238.

The second branch portion 235b is configured to electrically connect the second inner conductor 237 and the fourth inner conductor 239. One end of the second branch portion 235b is configured to be electrically connected to one corner of the four corners of the second inner conductor 237. The other end of the second branch portion 235b is configured to be electrically connected to one corner of the four corners of the fourth inner conductor 239. The second branch portion 235b may extend along the direction connecting the second power supply line 152 and the fourth power supply line 154. The second branch portion 235b may extend along the x direction. The width of the second branch portion 235b in the y direction may be thin enough to maintain a mechanical connection or an electrical connection between the second inner conductor 237 and the fourth inner conductor 239.

The first branch portion 235a and the second branch portion 235b may intersect near the center O1 of the radiation conductor 230. The first branch portion 235a and the second branch portion 235b may share a part near the center O1. The width of the first branch portion 235a in the x direction and the width of the second branch portion 235b in the y direction may be the same or different.

In the inner conductor 235, the capacitive coupling between the first inner conductor 236 to the fourth inner conductor 239 and the first conductor 131 to the fourth conductor 134 is the first branch portion 235a and the second branch portion 235b. It may be larger than the capacitive coupling between the first conductor 131 to the fourth conductor 134. In the capacitive coupling between the inner conductor 235 and the first conductor 131 to the fourth conductor 134, the capacitive coupling between the first inner conductor 236 to the fourth inner conductor 239 and the first conductor 131 to the fourth conductor 134 is performed. , Can be dominant.

For example, in the assembly process of the antenna 210, there may be a gap between the positions of the first conductor 131 to the fourth conductor 134 on the xy plane and the positions of the inner conductor 235 on the xy plane. Even if such a shift occurs, the shift amount between each of the first inner conductor 236 to the fourth inner conductor 239 and each of the first conductor 131 to the fourth conductor 134 in the xy plane can be small. .. By reducing this shift amount, it is possible to reduce the probability that the magnitude of capacitive coupling between the inner conductor 235 and the first conductor 131 to the fourth conductor 134 deviates from the designed value. With such a configuration, in the antenna 210, it is possible to reduce variation in the magnitude of capacitive coupling between the inner conductor 235 and the first conductor 131 to the fourth conductor 134.

FIG. 12 is a perspective view showing an embodiment of the antenna 310. FIG. 13 is a perspective view in which a part of the circuit board 360 shown in FIG. 12 is disassembled. FIG. 14 is a cross-sectional view of the circuit board 360 taken along line L2-L2 shown in FIG. FIG. 15 is a plan view illustrating the configuration of the radiation conductor 330 shown in FIG. Hereinafter, the main differences between the antenna 310 shown in FIG. 12 and the antenna 110 shown in FIG. 5 will be described.

As shown in FIGS. 12 and 14, the antenna 310 includes a base body 120, a radiation conductor 330, a ground conductor 140, and first to fourth connection conductors 155 to 158. As shown in FIG. 13, the antenna 310 includes a first power supply line 151, a second power supply line 152, a third power supply line 153, a fourth power supply line 154, and a circuit board 360 (multilayer wiring board). .. The radiating conductor 330, the ground conductor 140, the first connecting conductor 155 to the fourth connecting conductor 158, and the feeding line 150 are configured to function as the antenna element 311.

As shown in FIG. 12, the radiation conductor 330 includes a first conductor 131, a second conductor 132, a third conductor 133, and a fourth conductor 134. As shown in FIG. 15, the radiation conductor 330 includes an inner conductor 135. However, the radiation conductor 330 may include the inner conductor 235 shown in FIG. 11 instead of the inner conductor 135.

As shown in FIG. 15, the first conductor 131 to the fourth conductor 134 are arranged in a square lattice pattern on the upper surface 121 in the same or similar manner to the configuration shown in FIG. However, in the configuration shown in FIG. 15, the first diagonal direction of the square lattice in which the first conductor 131 to the fourth conductor 134 are arranged is inclined with respect to the y direction. By the first diagonal direction tilting with respect to the y direction, the first diagonal direction can tilt with respect to the direction connecting the first power feeding line 151 and the third power feeding line 153, for example, the y direction. Since the direction connecting the first power supply line 151 and the third power supply line 153 is inclined with respect to the first diagonal direction, the first power supply line 151 and the third power supply line 153 excite the radiation conductor 330 also in the x direction. Can be made In the configuration shown in FIG. 15, the second diagonal direction of the square lattice in which the first conductor 131 to the fourth conductor 134 are arranged is inclined with respect to the x direction. Since the second diagonal direction is inclined with respect to the x direction, the second diagonal direction can be inclined with respect to the direction connecting the second power feeding line 152 and the fourth power feeding line 154, for example, the x direction. Since the direction connecting the second power supply line 152 and the fourth power supply line 154 is inclined with respect to the second diagonal direction, the second power supply line 152 and the fourth power supply line 154 excite the radiation conductor 330 also in the y direction. Can be made The combination of the first feeding line 151 and the third feeding line 153 and the combination of the second feeding line 152 and the fourth feeding line 154 can excite the radiation conductor 330 in two excitation directions. By exciting the radiation conductor 330 in two exciting directions, the impedance component in each direction acts on the feeder 150. The antenna 310 can reduce the impedance at the time of input by canceling the impedance components in each direction. By reducing the impedance at the time of input, the antenna 310 can improve the isolation in the two polarization directions. The angle of inclination of the first diagonal direction with respect to the y direction and the angle of inclination of the second diagonal direction with respect to the x direction may be appropriately adjusted in consideration of the desired gain of the antenna 310.

As shown in FIG. 15, one of the two diagonal lines of the substantially square inner conductor 135 may extend along the first diagonal direction. One of the two diagonal lines of the substantially square inner conductor 135 may be inclined with respect to the y direction in the same or similar manner as the first diagonal direction. The other diagonal line of the two diagonal lines of the inner conductor 135 having a substantially square shape may be along the second diagonal direction. The other diagonal of the two diagonals of the inner conductor 135, which is substantially square, may be tilted with respect to the x-direction, the same as or similar to the second diagonal.

As shown in FIG. 14, the circuit board 360 has a structure in which each layer is stacked along the z direction. The stacking direction of the circuit board 360 may correspond to the z direction. In each layer of the circuit board 360, the layer located on the side opposite to the antenna 310 is referred to as a lower layer. In each layer of the circuit board 360, the layer located on the antenna 310 side is referred to as an upper layer.

As shown in FIG. 12, the circuit board 360 includes a first feeding circuit 61B and a second feeding circuit 62B. The first power feeding circuit 61B includes a first inverting circuit 63A. The second feeding circuit 62B includes a second inverting circuit 64A. The first inversion circuit 63A and the second inversion circuit 64A are baluns. As shown in FIG. 15, the first inverting circuit 63A may be located away from the center O1 of the radiation conductor 330 along the x direction. A distance connecting the center O1 of the radiation conductor 330 and the first inverting circuit 63A is described as a distance D5. The second inverting circuit 64A may be located away from the center O1 of the radiation conductor 330 along the y direction. A distance connecting the center O1 of the radiation conductor 330 and the second inverting circuit 64A is described as a distance D6. As described below, the distance D5 and the distance D6 may be different.

As shown in FIG. 13, the circuit board 360 includes a first wiring pattern 361 and a dielectric layer 361A, a second wiring pattern 362 and a dielectric layer 362A, a third wiring pattern 363 and a dielectric layer 363A, and a fourth wiring pattern 362. The wiring pattern 364 and the dielectric layer 364A are included. As shown in FIG. 14, the circuit board 360 includes a ground conductor layer 365, conductor layers 366 and 367, a first layer 368, and a second layer 369.

Each of the first wiring pattern 361 to the fourth wiring pattern 364 may be the wiring pattern of each of the first wiring 161 to the fourth wiring 164. The first wiring pattern 361 is configured to electrically connect the first inverting circuit 63A and the first power supply line 151. The second wiring pattern 362 is configured to electrically connect the second inverting circuit 64A and the second power supply line 152. The third wiring pattern 363 is configured to electrically connect the first inverting circuit 63A and the third power supply line 153. The fourth wiring pattern 364 is configured to electrically connect the second inverting circuit 64A and the fourth power supply line 154. Connection points 151B, connection points 152B, connection points 153B, and 154B are points at which the first to fourth power supply lines 151 to 154 are connected to the first to fourth wiring patterns 361 to 364, respectively. Both are also described.

The first wiring pattern 361 and the third wiring pattern 363 are located on the first layer 368 shown in FIG. The first wiring pattern 361 and the third wiring pattern 363 may extend along the xy plane in the first layer 368. As shown in FIG. 15, the first wiring pattern 361 and the third wiring pattern 363 may be line-symmetrical with the direction connecting the center O1 of the radiation conductor 330 and the first inverting circuit 63A as the axis of symmetry. Since the first wiring pattern 361 and the third wiring pattern 363 are line-symmetric, the width and wiring length of the first wiring pattern 361 can be equal to the width and wiring length of the third wiring pattern 363. The wiring length of the first wiring pattern 361 and the wiring length of the third wiring pattern 363 may be longer as the distance D5 shown in FIG. 15 is longer, and may be shorter as the distance D5 is shorter.

The second wiring pattern 362 and the fourth wiring pattern 364 are located on the second layer 369 shown in FIG. The second wiring pattern 362 and the fourth wiring pattern 364 may extend along the xy plane in the second layer 369. As shown in FIG. 15, the second wiring pattern 362 and the fourth wiring pattern 364 may be line-symmetric with respect to the direction connecting the center O1 of the radiation conductor 330 and the second inverting circuit 64A. Since the second wiring pattern 362 and the fourth wiring pattern 364 are line-symmetrical, the width and wiring length of the second wiring pattern 362 can be equal to the width and wiring length of the fourth wiring pattern 364. The wiring length of the second wiring pattern 362 and the wiring length of the fourth wiring pattern 364 may be longer as the distance D6 shown in FIG. 15 is longer, and may be shorter as the distance D6 is shorter.

The wiring lengths of the first wiring pattern 361 and the third wiring pattern 363 and the wiring lengths of the second wiring pattern 362 and the fourth wiring pattern 364 may be substantially equal or different. When the distance D5 and the distance D6 shown in FIG. 15 are substantially equal to each other, the wiring lengths of the first wiring pattern 361 and the third wiring pattern 363 are substantially equal to the wiring lengths of the second wiring pattern 362 and the fourth wiring pattern 364. sell. When the distance D5 and the distance D6 are different, the wiring lengths of the first wiring pattern 361 and the third wiring pattern 363 and the wiring lengths of the second wiring pattern 362 and the fourth wiring pattern 364 may be different. In this embodiment, the wiring lengths of the first wiring pattern 361 and the third wiring pattern 363 and the wiring lengths of the second wiring pattern 362 and the fourth wiring pattern 364 are adjusted by appropriately adjusting the distance D5 and the distance D6. The relationship between can be adjusted.

Each of the dielectric layers 361A to 364A includes any dielectric material. Each of the dielectric layers 361A to 364A surrounds the circumference of each of the first wiring pattern 361 to the fourth wiring pattern 364. Each of the dielectric layers 361A to 364A may have a shape depending on the shape of each of the first wiring pattern 361 to the fourth wiring pattern 364. The dielectric layer 361A and the dielectric layer 363A are located on the first layer 368 in the same or similar to the first wiring pattern 361 and the third wiring pattern 363. The dielectric layer 362A and the dielectric layer 364A are located in the second layer 369 in the same or similar to the second wiring pattern 362 and the fourth wiring pattern 364.

Ground conductor layer 365 may include the same or similar material as ground conductor 165 shown in FIG. The ground conductor layer 365 can extend along the xy plane. The ground conductor layer 365 may be the uppermost layer of the circuit board 360. The ground conductor layer 365 faces the ground conductor 140 of the antenna 310. The ground conductor layer 365 and the ground conductor 140 of the antenna 310 may be integrated.

Each of the conductor layers 366 and 367 may include the same or similar material as the ground conductor 165 shown in FIG. The conductor layer 366 is a lower layer of the first layer 366. The conductor layer 367 is located between the first layer 368 and the second layer 369. Each of the conductor layers 366 and 367 can extend along the xy plane. Each of the conductor layer 366 and the conductor layer 367 may be configured to be electrically connected to the ground conductor layer 365 via a via or the like.

The conductor layer 366 and the conductor layer 377 are configured to shield each of the first wiring pattern 361 and the third wiring pattern 363 in the z direction. The conductor layer 367 and the ground conductor layer 365 are configured to shield each of the second wiring pattern 362 and the fourth wiring pattern 364 in the z direction.

The first layer 368 is a lower layer than the second layer 369. The first layer 368 is farther from the radiation conductor 330 than the second layer 369 in the stacking direction of the circuit boards 360, for example, in the z direction.

The first layer 368 includes a first wiring pattern 361 and a dielectric layer 361A, a third wiring pattern 363 and a dielectric layer 363A, and a conductor layer 368A. Conductor layer 368A may include the same or similar material as ground conductor 165 shown in FIG. The conductor layer 368A may be configured to be electrically connected to the conductor layer 366 below the first layer 368 and the conductor layer 367 above the first layer 368 by vias or the like. The conductor layer 368A may be configured to fill a portion of the first layer 368 excluding the dielectric layer 361A and the dielectric layer 363A. The conductor layer 368A is configured to shield each of the first wiring pattern 361 and the third wiring pattern 363 in the x direction and the y direction.

The second layer 369 includes a second wiring pattern 362 and a dielectric layer 362A, a fourth wiring pattern 364 and a dielectric layer 364A, and a conductor layer 369A. Conductor layer 369A may include the same or similar material as ground conductor 165 shown in FIG. The conductor layer 369A may be configured to be electrically connected to the ground conductor layer 365 that is the upper layer of the second layer 369 and the conductor layer 367 that is the lower layer of the second layer 369 by vias or the like. The conductor layer 369A may be configured to fill a portion of the second layer 369 excluding the dielectric layer 362A and the dielectric layer 364A. The conductor layer 369A is configured to shield each of the second wiring pattern 362 and the fourth wiring pattern 364 in the x direction and the y direction.

As shown in FIG. 13, each of the first power supply line 151 and the third power supply line 153 is configured to be electrically connected to each of the first wiring pattern 361 and the third wiring pattern 363. As described above, each of the first wiring pattern 361 and the third wiring pattern 363 is located on the same first layer 368. Since the first wiring pattern 361 and the third wiring pattern 363 are located on the same first layer 368, the positions of the connection points 151B and 153B in the z direction can be substantially equal. Since the positions of the connection point 151B and the connection point 153B in the z direction are substantially equal, the position of the feeding point 151A in the z direction and the position of the feeding point 153A in the z direction can be substantially equal. Therefore, the length of the first power supply line 151 in the z direction and the length of the third power supply line 153 in the z direction can be substantially equal.

As shown in FIG. 13, each of the second power supply line 152 and the fourth power supply line 154 is configured to be electrically connected to each of the second wiring pattern 362 and the fourth wiring pattern 364. As described above, each of the second wiring pattern 362 and the fourth wiring pattern 364 is located on the same second layer 369. Since the second wiring pattern 362 and the fourth wiring pattern 364 are located on the same second layer 369, the positions of the connection points 152B and 154B in the z direction can be substantially equal. Since the positions of the connection point 152B and the connection point 154B in the z direction are substantially equal, the position of the feeding point 152A in the z direction and the position of the feeding point 154A in the z direction can be substantially equal. Therefore, the length of the second power supply line 152 in the z direction and the length of the fourth power supply line 154 in the z direction can be substantially equal.

As described above, the first layer 368 is lower than the second layer 369. Since the first layer 368 is lower than the second layer 369, the connection points 151B and 153B located on the first layer 368 are more z than the connection points 152B and 154B located on the second layer. Located on the negative side of the axis. As shown in FIG. 13, the feed point 151A, the feed point 152A, the feed point 153A, and the feed point 154A can be substantially equal in position in the z direction. Therefore, the length of the first power supply line 151 in the z direction and the length of the third power supply line 153 in the z direction are greater than the length of the second power supply line 152 in the z direction and the length of the fourth power supply line 154 in the z direction. Can also be long. The resistance value of the first power supply line 151 and the resistance value of the third power supply line 153 may be higher than the resistance value of the second power supply line 152 and the resistance value of the fourth power supply line 154.

When the resistance value of the first power supply line 151 and the resistance value of the third power supply line 153 are higher than the resistance value of the second power supply line 152 and the resistance value of the fourth power supply line 152, as shown in FIG. , And may be longer than the distance D5. Since the distance D6 is longer than the distance D5, the wiring lengths of the second wiring pattern 362 and the fourth wiring pattern 364 can be longer than the wiring lengths of the first wiring pattern 361 and the third wiring pattern 363. The resistance values of the second wiring pattern 362 and the fourth wiring pattern 364 may be higher than the resistance values of the first wiring pattern 361 and the third wiring pattern 363. With such a configuration, the resistance value from the first inverting circuit 63A to each of the feeding point 151A and the feeding point 153A and the resistance value from the second inverting circuit 64A to each of the feeding point 152A and the feeding point 154A are substantially equal. can do. However, the balun characteristics of each of the first inverting circuit 63A and the second inverting circuit 64A may vary within the allowable error range. In this case, the phase difference between the two electric signals output from the first inverting circuit 63A and the phase difference between the two electric signals output from the second inverting circuit 64A may deviate from 180 °. When the phase difference between these two electric signals deviates from 180 °, the degree of interference between the first wiring pattern 361 to the fourth wiring pattern 364 deviates from the 180 ° phase difference between these two electric signals. It may change as compared to the absence. In this case, the distance D5 and the distance D6 may be appropriately adjusted in consideration of the desired gain of the antenna 310 in the desired frequency band.

The direction connecting the center O1 of the radiation conductor 330 and the first inversion circuit 63A may be inclined with respect to the x direction depending on the phase difference between the two electric signals output from the first inversion circuit 63A. For example, the direction connecting the center O1 of the radiation conductor 330 and the first inverting circuit 63A to the x direction is such that the phase difference between the electric signal at the feeding point 151A and the electric signal at the feeding point 153A is 180 °. You can tilt it.

The direction connecting the center O1 of the radiation conductor 330 and the second inverting circuit 64A may be tilted with respect to the y direction depending on the phase difference between the two electric signals output from the second inverting circuit 64A. For example, the direction connecting the center O1 of the radiation conductor 330 and the second inverting circuit 64A to the y direction is such that the phase difference between the electric signal at the feeding point 152A and the electric signal at the feeding point 154A is 180 °. You can tilt it.

FIG. 16 is a plan view showing an embodiment of the array antenna 12. The array antenna 12 includes a plurality of antenna elements 11. However, the array antenna 12 may include any one of the antenna element 111 shown in FIG. 5, the antenna element 211 shown in FIG. 10, and the antenna element 311 shown in FIG. 12, instead of the antenna element 11. The antenna elements 11 can be arranged along the y direction. The antenna elements 11 can be arranged in the y direction. The antenna elements 11 can be arranged along the x direction. The antenna elements 11 can be arranged in the x direction. The array antenna 12 includes at least one circuit board 60. The circuit board 60 includes at least one first feeding circuit 61 and at least one second feeding circuit 62. The array antenna 12 includes at least one first feeding circuit 61 and at least one second feeding circuit 62.

The first feeding circuit 61 may be configured to be connected to one or more antenna elements 11. The first feeding circuit 61 may be configured to supply the same signal to all the antenna elements 11 when feeding the plurality of antenna elements 11. The first feeding circuit 61 may be configured to supply the same signal to the first feeding line 51 of each antenna element 11 when feeding the plurality of antenna elements 11. The first feeding circuit 61 may be configured to supply signals having different phases to the first feeding line 51 of each antenna element 11 when feeding the plurality of antenna elements 11. The first feeding circuit 61 may be configured to supply the same signal to the third feeding line 53 of each antenna element 11 when feeding the plurality of antenna elements 11. The first feeding circuit 61 may be configured to supply signals having different phases to the third feeding line 53 of each antenna element 11 when feeding the plurality of antenna elements 11.

The second feeding circuit 62 can be configured to be connected to one or more antenna elements 11. The second feeding circuit 62 may be configured to supply the same signal to all the antenna elements 11 when feeding the plurality of antenna elements 11. The second feeding circuit 62 may be configured to supply the same signal to the second feeding line 52 of each antenna element 11 when feeding the plurality of antenna elements 11. The second feeding circuit 62 may be configured to supply signals having different phases to the second feeding line 52 of each antenna element 11 when feeding the plurality of antenna elements 11. The second feeding circuit 62 may be configured to supply the same signal to the fourth feeding line 54 of each antenna element 11 when feeding the plurality of antenna elements 11. The second feeding circuit 62 may be configured to supply signals having different phases to the fourth feeding line 54 of each antenna element 11 when feeding the plurality of antenna elements 11.

FIG. 17 is a plan view showing an embodiment of the wireless communication module 70. The wireless communication module 70 includes a drive circuit 71. The drive circuit 71 is configured to drive the antenna element 11. However, the drive circuit 71 may be configured to drive any of the antenna element 111 shown in FIG. 5, the antenna element 211 shown in FIG. 10, and the antenna element 311 shown in FIG. The drive circuit 71 is configured to be directly or indirectly connected to each of the first power supply circuit 61 and the second power supply circuit 62. The drive circuit 71 can be configured to supply a transmission signal to at least one of the first power supply circuit 61 and the second power supply circuit 62. The drive circuit 71 can be configured to receive power of the received signal from at least one of the first power supply circuit 61 and the second power supply circuit 62.

FIG. 18 is a plan view showing an embodiment of the wireless communication device 80. The wireless communication device 80 may include the wireless communication module 70, a sensor 81, and a battery 82. The sensor 81 performs sensing. The battery 82 is configured to supply power to any of the wireless communication devices 80. The drive circuit 71 can be configured to be driven by the power supply from the battery 82.

FIG. 19 is a plan view showing an embodiment of the wireless communication system 90. The wireless communication system 90 includes a wireless communication device 80 and a second wireless communication device 91. The second wireless communication device 91 is configured to wirelessly communicate with the wireless communication device 80.

Therefore, according to the present disclosure, a

new antenna

10, 110, 210, 310, array antenna 12, wireless communication module 70, and wireless communication device 80 can be provided.

The configuration according to the present disclosure is not limited to the embodiments described above, and various modifications and changes are possible. For example, the functions and the like included in each component can be rearranged so as not to logically contradict each other, and a plurality of components can be combined into one or divided.

The diagram illustrating the configuration according to the present disclosure is schematic. The dimensional ratios and the like on the drawings do not always match the actual ones.

In the embodiment shown in FIG. 1, a patch antenna is adopted as the antenna element 11. However, the antenna element 11 is not limited to the patch antenna. Other antennas may be used as the antenna element 11.

In the embodiment shown in FIG. 16, a plurality of antenna elements 11 can be arranged in the same direction in the array antenna 12. In the array antenna 12, two adjacent antenna elements 11 may have different directions. When the orientations of two adjacent antenna elements 11 are different, the antenna elements 11 are excited in the same direction.

In the present disclosure, descriptions such as “first”, “second”, and “third” are examples of identifiers for distinguishing the configuration. The configurations distinguished by the description such as “first” and “second” in the present disclosure can exchange the numbers in the configurations. For example, the first power supply line can exchange the identifiers “first” and “second” with the second power supply line. The exchange of identifiers is done simultaneously. Even after exchanging the identifiers, the configurations are distinguished. The identifier may be deleted. The configuration in which the identifier is deleted is distinguished by the code. For example, the first power supply line 51 can be the power supply line 51. Based on only the description of the identifiers such as “first” and “second” in the present disclosure, the interpretation of the order of the configuration, the basis for the existence of the small numbered identifier, and the existence of the large numbered identifier If you do not use it as a basis, you do not. The present disclosure includes a configuration in which the circuit board 60 includes the second power supply circuit 62 but does not include the first power supply circuit 61.

10, 110, 210, 310 antenna 11, 111, 211, 311 antenna element 12 array antenna 20, 120 substrate 30, 130, 230, 330 radiating conductor 40, 140 ground conductor 40a, 141, 142, 143, 144 opening 50, 150 feeder line 51,151 1st feeder line 52,152 2nd feeder line 53,153 3rd feeder line 54,154 4th feeder line 51A, 52A, 53A, 54A, 151A, 152A, 153A, 154A feeding point 60, 160, 360 Circuit board 60A Ground conductor 61, 61A, 61B First feeding circuit 62, 62A, 62B Second feeding circuit 63, 63A First inversion circuit 64, 64A Second inversion circuit 70 Wireless communication module 71 Driving circuit 80 Wireless communication Equipment 81 Sensor 82 Battery 90 None Line communication system 91 Second wireless communication device 121 Upper surface 122 Lower surface 131 First conductor 132 Second conductor 133 Third conductor 134 Fourth conductor 135,235 Inner conductor 151B, 152B, 153B, 154B Connection point 155 First connection conductor 156th 2 connection conductor 157 3rd connection conductor 158 4th connection conductor 161 1st wiring 162 2nd wiring 163 3rd wiring 164 4th wiring 165 ground conductor 235a 1st branch part 235b 2nd branch part 236 1st inner conductor 237 2nd Inner conductor 238 Third inner conductor 239 Fourth inner conductor 361 First wiring pattern 362 Second wiring pattern 363 Third wiring pattern 364 Fourth wiring pattern 361A, 362A, 363A, 364A Dielectric layer 365 Ground conductor layer 366, 367, 368A, 369A Conductor layer 368 First Layer 369 Second layer

Claims

A radiation conductor,
A ground conductor,
A first feed line configured to be electromagnetically connected to the radiation conductor;
A second feed line configured to be electromagnetically connected to the radiation conductor;
A third feeder configured to be electromagnetically connected to the radiating conductor;
A fourth feed line configured to be electromagnetically connected to the radiation conductor;
A first feeding circuit configured to feed opposite-phase signals having mutually opposite phases to the first feeding line and the third feeding line;
A second power supply circuit configured to supply opposite-phase signals having opposite phases to the second power supply line and the fourth power supply line,
The radiation conductor is
It is configured to be excited in a first direction by power feeding from the first power feeding line and the third power feeding line,
The second power supply line and the fourth power supply line are configured to excite in the second direction by power supply.
The third feeder is located on the opposite side of the first feeder from the center of the radiation conductor in the first direction,
The fourth power supply line is located on the opposite side of the second power supply line in the second direction when viewed from the center of the radiation conductor.
antenna.
The antenna according to claim 1, wherein
The direction connecting the first power supply line and the third power supply line is inclined with respect to the first direction,
An antenna in which a direction connecting the second power supply line and the fourth power supply line is inclined with respect to the second direction.
The antenna according to claim 1, wherein
The radiation conductor includes a first conductor, a second conductor, a third conductor, and a fourth conductor,
The antenna is
A first connection conductor configured to electrically connect the first conductor and the ground conductor;
A second connection conductor configured to electrically connect the second conductor and the ground conductor;
A third connection conductor configured to electrically connect the third conductor and the ground conductor;
A fourth connecting conductor configured to electrically connect the fourth conductor and the ground conductor,
The first power supply line is configured to be electromagnetically connected to the first conductor,
The second power supply line is configured to be electromagnetically connected to the second conductor,
The third power supply line is configured to be electromagnetically connected to the third conductor,
The fourth feeder is configured to be electromagnetically connected to the fourth conductor,
antenna.
The antenna according to claim 3,
The radiation conductor further includes an inner conductor,
The inner conductor is
In a third direction intersecting with a first plane that includes the first direction and the second direction, and is located away from the first conductor, the second conductor, the third conductor, and the fourth conductor,
An antenna configured to capacitively connect the first conductor, the second conductor, the third conductor, and the fourth conductor.
The antenna according to claim 4, wherein
The inner conductor is
A first inner conductor facing the first conductor in the third direction;
A second inner conductor facing the second conductor in the third direction;
A third inner conductor facing the third conductor in the third direction,
A fourth inner conductor facing the fourth conductor in the third direction;
A first branch portion configured to electrically connect the first inner conductor and the third inner conductor;
An antenna, comprising: a second branch portion configured to electrically connect the second inner conductor and the fourth inner conductor.
The antenna according to any one of claims 3 to 5,
The first conductor, the second conductor, the third conductor, and the fourth conductor are arranged in a square lattice,
The first conductor and the third conductor are arranged in a first diagonal direction of the square lattice,
The second conductor and the fourth conductor are arranged in a second diagonal direction of the square lattice,
The first diagonal direction is inclined with respect to the first direction,
The antenna, wherein the second diagonal direction is inclined with respect to the second direction.
The antenna according to any one of claims 1 to 6,
The first power supply circuit,
A first inverting circuit including a balun,
A first wiring configured to electrically connect the first inverting circuit and the first power supply line;
A third wiring configured to electrically connect the first inverting circuit and the third power supply line;
Including,
The first wiring and the third wiring are configured to feed an anti-phase signal whose phase is inverted in a resonance frequency band to the first power feeding line and the third power feeding line,
The second power supply circuit,
A second inverting circuit including a balun,
A second wiring electrically connecting the second inverting circuit and the second power supply line;
A fourth wiring electrically connecting the second inverting circuit and the fourth power supply line,
An antenna configured to feed a negative phase signal, the phase of which is inverted in the resonance frequency band, from the second wiring and the fourth wiring to the second feeding line and the fourth feeding line.
The antenna according to claim 7,
Further including a multilayer wiring board,
The multilayer wiring board,
The first wiring as a first wiring pattern,
The second wiring as a second wiring pattern,
The third wiring as a third wiring pattern,
And a fourth wiring as a fourth wiring pattern,
The first wiring pattern and the third wiring pattern are
It is located in the first layer of the multilayer wiring board and is line-symmetrical with the direction connecting the center of the radiation conductor and the first inverting circuit as the axis of symmetry.
The second wiring pattern and the fourth wiring pattern are
It is located in a second layer different from the first layer of the multilayer wiring board, and is line-symmetrical with the direction connecting the center of the radiation conductor and the second inverting circuit as the axis of symmetry.
An antenna in which a distance connecting a center of the radiation conductor and the first inverting circuit is different from a distance connecting a center of the radiation conductor and the second inverting circuit.
The antenna according to claim 8,
The first layer is farther from the radiation conductor than the second layer in the stacking direction of the multilayer wiring board,
The first inverting circuit is located away from the center of the radiation conductor along the second direction,
The second inverting circuit is located away from the center of the radiation conductor along the first direction,
An antenna in which the distance between the center of the radiation conductor and the second inverting circuit in the first direction is longer than the distance between the center of the radiation conductor and the first inverting circuit in the second direction. ..
The antenna according to any one of claims 1 to 6,
The first feeding circuit includes an antenna that includes a first inverting circuit that inverts a phase in a resonance frequency band.
The antenna according to claim 10, wherein
The first inverting circuit is an antenna, which is either a balun or a delay line.
The antenna according to claim 10 or 11, wherein:
The antenna, wherein the second feeding circuit includes a second inverting circuit that inverts a phase in a resonance frequency band.
The antenna according to claim 12,
An antenna in which the second inverting circuit is one of a balun and a delay line.
The antenna according to any one of claims 1 to 13,
The first power supply circuit,
An inductance element connected to the first power supply line,
A capacitance element connected to the third power supply line.
The antenna according to any one of claims 1 to 14,
The second power supply circuit,
An inductance element connected to the second power supply line,
A capacitance element connected to the fourth feed line.
The antenna according to any one of claims 1 to 15,
The antenna is configured to resonate with a node near a center of the radiation conductor as a node.
The antenna according to any one of claims 1 to 16,
The first power supply line and the second power supply line have symmetry with a first axis of symmetry passing through the center of the radiation conductor interposed therebetween.
An antenna in which the third feeder line and the fourth feeder line have symmetry with respect to the first axis of symmetry.
The antenna according to any one of claims 1 to 17,
The first power supply line and the fourth power supply line have symmetry with a second axis of symmetry passing through the center of the radiation conductor interposed therebetween.
An antenna in which the second feeder line and the third feeder line have symmetry with respect to the second axis of symmetry.
The antenna according to any one of claims 1 to 18,
An antenna in which the first direction is orthogonal to the second direction.
The antenna according to any one of claims 1 to 19,
An antenna, wherein the radiating conductor is one-half the size of an operating wavelength.
A plurality of antenna elements, each of which is the antenna according to any one of claims 1 to 20,
An array antenna in which a plurality of the antenna elements are arranged in the first direction.
The array antenna according to claim 21, wherein:
An array antenna in which a plurality of the antenna elements are arranged in the first direction and the second direction.
An antenna element which is the antenna according to any one of claims 1 to 20,
A drive circuit configured to be directly or indirectly connected to each of the first power supply circuit and the second power supply circuit.
Wireless communication module.
The wireless communication module according to claim 23,
The drive circuit is configured to supply a transmission signal to the first power supply circuit and receive a reception signal from the second power supply circuit.
Wireless communication module.
An array antenna according to claim 21 or 22,
A drive circuit configured to be directly or indirectly connected to each of the first power supply circuit and the second power supply circuit.
Wireless communication module.
The wireless communication module according to claim 25,
The drive circuit is
It is configured to supply a transmission signal to at least one of the first power supply circuit and the second power supply circuit,
It is configured to receive a reception signal from at least one of the first power supply circuit and the second power supply circuit.
Wireless communication module.
The wireless communication module according to any one of claims 23 to 26,
A battery configured to drive the drive circuit,
Wireless communication equipment.