JP2019009544A - Dual band patch antenna - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dual band patch antenna whose resonance frequency and impedance can be easily adjusted. SOLUTION: A ground pattern 20 having an opening 21, a pillar-shaped vertical feeding conductor 41 provided through the opening 21, and a vertical feeding conductor overlapping the ground pattern 20 at a position covering the vertical feeding conductor 41. The first radiating conductor 31 connected to 41, the horizontal feeding conductor 51 connected to the vertical feeding conductor 41, and the ground pattern 20 overlap the ground pattern 20 at a position not covering the vertical feeding conductor 41, and are vertical via the horizontal feeding conductor 51. It includes a second radiating conductor 32 connected to the feeding conductor 41. In this way, the first radiating conductor 31 is directly fed by the vertical feeding conductor 41, while the second radiating conductor 32 is fed via the horizontal feeding conductor 51 branched from the vertical feeding conductor 41. Therefore, even if the size or shape of one radiating conductor is changed, the change in resonance frequency or impedance in the other radiating conductor can be suppressed. [Selection diagram] Fig. 1

Description

  The present invention relates to a dual-band patch antenna capable of communication in two frequency bands.

  Patent Documents 1 to 3 disclose dual band patch antennas capable of communication in two frequency bands. For example, Patent Document 1 discloses a dual-band patch antenna composed of a flat radiation conductor and an annular radiation conductor, and Patent Document 2 discloses a dual-band patch antenna in which a part of two radiation conductors is shared. ing. Patent Document 3 discloses a configuration in which a power supply line is branched in the middle, and the branched power supply lines are connected to different radiation conductors.

Special table 2015-502723 gazette JP 2007-060609 A JP 2002-299948 A

  However, in the dual-band patch antennas described in Patent Documents 1 to 3, since the two radiating conductors interfere with each other, changing the size and shape of one radiating conductor causes the resonance frequency and impedance in the other radiating conductor to be changed. It will change greatly. For this reason, there is a problem that it is difficult to adjust the resonance frequency and impedance for each radiation conductor.

  Accordingly, an object of the present invention is to provide a dual band patch antenna in which the resonance frequency and impedance can be easily adjusted.

  A dual-band patch antenna according to the present invention includes a ground pattern having a first opening, a pillar-shaped first vertical feed conductor provided through the first opening, and the first vertical feed. A first radiating conductor connected to the first vertical feeding conductor; a first horizontal feeding conductor connected to the first vertical feeding conductor; A second radiating conductor that overlaps the ground pattern at a position that does not cover one vertical feeding conductor and is connected to the first vertical feeding conductor via the first horizontal feeding conductor. To do.

  According to the present invention, the first radiating conductor is directly fed by the vertical feeding conductor, while the second radiating conductor is fed through the horizontal feeding conductor branched from the vertical feeding conductor. Even if the size or shape of the radiating conductor is changed, changes in the resonance frequency and impedance in the other radiating conductor can be suppressed. Thereby, compared with the conventional dual band patch antenna, the resonance frequency and the impedance can be easily adjusted. In addition, since the first radiation conductor is directly fed by the vertical feeding conductor, the feeding line can be simplified. This facilitates design even when the antenna characteristics change greatly due to slight changes in the pattern such as the wiring length and wiring position, as in the case where the resonance frequency is in the millimeter wave band.

  The dual-band patch antenna according to the present invention may further include a first open stub having one end connected to the first horizontal feed conductor and the other end open. According to this, the antenna resonance signal of the first radiation conductor conducted through the first horizontal feed conductor can be blocked by the first open stub.

  The dual-band patch antenna according to the present invention further includes a pillar-shaped second vertical feed conductor covered with a second radiation conductor, and one end of the second vertical feed conductor is connected to the first horizontal feed conductor, The other end of the two vertical feeding conductors may be connected to the second radiation conductor. According to this, it becomes possible to feed power from an arbitrary plane position of the second radiation conductor.

  The dual-band patch antenna according to the present invention includes a pillar-shaped third vertical feed conductor provided through the second opening of the ground pattern, and a second horizontal feed connected to the third vertical feed conductor. A first radiating conductor covering the first and third vertical feeding conductors and connected to the first and third vertical feeding conductors at different plane positions, and the second radiating conductor May be provided at a position where the first and third vertical power supply conductors are not covered, and further connected to the second vertical power supply conductor via the second horizontal power supply conductor. According to this, it becomes possible to input a plurality of power supply signals to one radiation conductor.

  The dual-band patch antenna according to the present invention may further include a second open stub having one end connected to the second horizontal feed conductor and the other end opened. According to this, the antenna resonance signal of the first radiation conductor conducted through the second horizontal feed conductor can be blocked by the second open stub.

The dual-band patch antenna according to the present invention further includes a pillar-shaped fourth vertical feed conductor covered with a second radiation conductor, and one end of the fourth vertical feed conductor is connected to the second horizontal feed conductor, The other end of the four vertical feed conductors may be connected to the second radiation conductor at a different plane position from the second vertical feed conductor. According to this, it becomes possible to feed power to the second radiation conductor from any two plane positions.

  In the present invention, the first and second radiation conductors have sides extending along the first direction and sides extending along a second direction orthogonal to the first direction, The first radiating conductor and the second radiating conductor may not overlap each other in the first and second directions in plan view. According to this, it becomes possible to further reduce interference between the first radiation conductor and the second radiation conductor.

  In the present invention, the distance between the ground pattern and the first radiation conductor may be different from the distance between the ground pattern and the second radiation conductor. In the present invention, since the first radiating conductor and the second radiating conductor are provided separately, the distance from the ground pattern can be set individually.

  In the present invention, the distance between the ground pattern and the first radiation conductor is equal to or less than the wavelength of the first antenna resonance signal radiated from the first radiation conductor, and the distance between the ground pattern and the second radiation conductor is It may be less than or equal to the wavelength of the second antenna resonance signal radiated from the second radiation conductor. According to this, while being able to make the whole thickness thin, it becomes possible to obtain high radiation efficiency.

  The dual-band patch antenna according to the present invention is located on the side opposite to the ground pattern when viewed from the first radiation conductor, and is arranged in parallel with the first radiation conductor so as to overlap the first radiation conductor. An excitation conductor and a second excitation conductor that is located on the opposite side of the ground pattern from the second radiation conductor and is disposed in parallel with the second radiation conductor so as to overlap the second radiation conductor; It may be further provided. According to this, since the excitation conductor is excited by the radiation conductor, the antenna characteristics can be improved.

  In the present invention, the first and second excitation conductors may be in a floating state. According to this, the antenna band can be widened.

  In the present invention, the distance between the first radiation conductor and the first excitation conductor may be different from the distance between the second radiation conductor and the second excitation conductor. Thus, the adjustment of the antenna characteristics by the excitation conductor can be performed individually.

  In the present invention, the first vertical feed conductor and the first and second radiation conductors may be embedded with a dielectric material. According to this, the overall size can be reduced by the wavelength shortening effect of the dielectric.

  In the present invention, the thickness of the dielectric material may be thicker in the portion covering the first and second radiation conductors than in the portion covering the first horizontal feed conductor. According to this, since the radiation direction of the beam is narrowed in the vertical direction, the gain in the vertical direction can be increased.

  In the present invention, the first radiation conductor and the second radiation conductor may face different directions. According to this, it becomes possible to emit a beam in a plurality of directions.

  In the present invention, the portion of the first radiation conductor and the ground pattern that overlaps the first radiation conductor is formed on the first substrate, and the portion of the second radiation conductor and the ground pattern that overlaps the second radiation conductor is It is formed on the second substrate, and the first substrate and the second substrate may be connected via a flexible substrate. According to this, it becomes possible to arbitrarily set the angle between the first radiation conductor and the second radiation conductor.

  As described above, according to the present invention, it is possible to provide a dual band patch antenna in which the resonance frequency and impedance can be easily adjusted.

FIG. 1 is a schematic perspective view showing the configuration of a dual-band patch antenna 10A according to the first embodiment of the present invention. FIG. 2 is a plan view of the dual-band patch antenna 10A. FIG. 3 is a side view of the dual-band patch antenna 10A viewed from the direction of arrow A shown in FIG. FIG. 4 is a diagram for explaining the vibration directions of the beams emitted from the first and second radiation conductors 31 and 32. FIG. 5 is a schematic perspective view showing the configuration of a dual-band patch antenna 10B according to the second embodiment of the present invention. FIG. 6 is a plan view of the dual-band patch antenna 10B. FIG. 7 is a side view of the dual-band patch antenna 10B as seen from the direction of arrow A shown in FIG. FIG. 8 is a schematic perspective view showing the configuration of a dual-band patch antenna 10C according to the third embodiment of the present invention. FIG. 9 is a plan view of the dual-band patch antenna 10C. FIG. 10 is a side view of the dual-band patch antenna 10C as viewed from the direction of arrow A shown in FIG. FIG. 11 is a schematic perspective view showing the configuration of a dual-band patch antenna 10D according to the fourth embodiment of the present invention. FIG. 12 is a schematic perspective view showing the configuration of a dual-band patch antenna 10E according to the fifth embodiment of the present invention.

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

<First Embodiment>
FIG. 1 is a schematic perspective view showing the configuration of a dual-band patch antenna 10A according to the first embodiment of the present invention. 2 is a plan view of the dual-band patch antenna 10A, and FIG. 3 is a side view of the dual-band patch antenna 10A viewed from the direction of arrow A shown in FIG.

  As shown in FIGS. 1 to 3, the dual-band patch antenna 10 </ b> A according to the present embodiment includes a flat ground pattern 20 formed on the substrate 60, and first and second layers provided so as to overlap the ground pattern 20. The radiation conductors 31 and 32 are provided. The ground pattern 20 is a solid pattern provided on the conductor layer L1, and constitutes an xy plane. An opening 21 is formed in the ground pattern 20, and the ground pattern 20 is removed in this portion. A vertical feed conductor 41 is provided so as to penetrate the opening 21. As shown in FIG. 3, the vertical feed conductor 41 is a pillar-shaped conductor extending in the z direction, and is connected to the RF circuit 100 provided outside the dual-band patch antenna 10A.

  The vertical power supply conductor 41 passes through the conductor layer L1 where the ground pattern 20 is formed, and reaches the conductor layers L2 to L5 located above the conductor layer L1. A horizontal feeding conductor 51 is formed on the conductor layer L2, a second radiation conductor 32 is formed on the conductor layer L3 so as not to overlap the vertical feeding conductor 41, and a position overlapping the vertical feeding conductor 41 on the conductor layer L5. A first radiation conductor 31 is formed. The horizontal power supply conductor 51 connects the vertical power supply conductor 41 and the vertical power supply conductor 42, and has a portion extending in the x direction and a portion extending in the y direction in this embodiment. The vertical feeding conductor 42 is a pillar-shaped conductor provided at a position overlapping the second radiation conductor 32, and connects the end of the horizontal feeding conductor 51 and the second radiation conductor 32 at a predetermined plane position. The vertical feed conductor 41 is provided at a position overlapping the first radiating conductor 31 and is connected to a predetermined planar position of the first radiating conductor 31. Thus, the vertical feed conductor 41 is used as a common feed conductor for the first and second radiation conductors 31 and 32, and the first radiation conductor 31 is directly fed by the vertical feed conductor 41. On the other hand, power is supplied to the second radiation conductor 32 via a horizontal power supply conductor 51 and a vertical power supply conductor 42 branched from the vertical power supply conductor 41.

  Each of the conductor layers L1 to L5 is covered with an insulating layer 70 made of a dielectric material. Thereby, at least the vertical power supply conductor 41, the horizontal power supply conductor 51, and the first and second radiation conductors 31 and 32 have a structure embedded with a dielectric material. As the dielectric material, it is preferable to select a material excellent in high-frequency characteristics such as ceramic or liquid crystal polymer.

  The planar shapes of the first radiating conductor 31 and the second radiating conductor 32 are both substantially square, but their planar sizes are different from each other. Specifically, the first radiating conductor 31 has a larger plane size than the second radiating conductor 32, whereby the first radiating conductor 31 is used as a radiating conductor for the low frequency band, and the second The radiation conductor 32 is used as a radiation conductor for a high frequency band.

  In the present embodiment, since the first radiation conductor 31 is provided in the conductor layer L5 and the second radiation conductor 32 is provided in the conductor layer L3, the z direction of the ground pattern 20 and the first radiation conductor 31 is the same. Is larger than the distance T2 between the ground pattern 20 and the second radiation conductor 32 in the z direction. Here, in order to obtain high radiation efficiency, the distance T1 is equal to or less than the wavelength of the first antenna resonance signal radiated from the first radiation conductor 31, and the distance T2 is radiated from the second radiation conductor 32. The wavelength is preferably equal to or shorter than the wavelength of the second antenna resonance signal. According to this, the thickness of the dual band patch antenna 10A in the z direction can be reduced.

  However, in the present invention, it is not essential that the distance T1 is longer than the distance T2, and the distances T1 and T2 may be designed according to the target antenna characteristics. Further, the first radiation conductor 31 and the second radiation conductor 32 may be formed in the same conductor layer. However, in order to be able to individually adjust the antenna characteristics, it is preferable to form the first radiation conductor 31 and the second radiation conductor 32 in different conductor layers.

  In addition, an open stub 51 s connected to the horizontal power supply conductor 51 is formed in the conductor layer L2. One end of the open stub 51 s is connected to the horizontal feed conductor 51 and the other end is open. The length of the open stub 51 s is about ¼ of the wavelength of the first antenna resonance signal radiated from the first radiation conductor 31. Designed to. As a result, the first antenna resonance signal conducted through the horizontal feed conductor 51 is blocked by the open stub 51 s, so that the first antenna resonance signal is conducted to the second radiation conductor 32 via the horizontal feed conductor 51. Can be prevented. As a result, the independence of the first radiation conductor 31 and the second radiation conductor 32 is enhanced.

  In the present embodiment, the connection position of the vertical feeding conductor 41 with respect to the first radiation conductor 31 is the center position in the y direction of the first radiation conductor 31 and is a position offset in the x direction. On the other hand, the connection position of the vertical feeding conductor 42 with respect to the second radiation conductor 32 is the center position in the x direction of the second radiation conductor 32 and is a position offset in the y direction.

  Thereby, as shown in FIG. 4, the vibration direction Px of the beam radiated from the first radiation conductor 31 is the x direction, and the vibration direction Py of the beam radiated from the second radiation conductor 32 is the y direction. . Thus, in the present embodiment, the vibration direction of the beam radiated from the first radiation conductor 31 and the vibration direction of the beam radiated from the second radiation conductor 32 are orthogonal to each other, so that mutual interference hardly occurs. Become. As a result, even if the shape, position, size, etc. of one radiation conductor is changed, the antenna characteristics of the other radiation conductor do not change greatly, and the design becomes easy.

  In particular, as shown in FIG. 4, the arrangement range Ay in the y direction of the first radiation conductor 31 does not overlap with the second radiation conductor 32 in plan view, and the arrangement of the second radiation conductor 32 in the x direction. The first and second radiation conductors 31 and 32 are preferably laid out so that the range Ax does not overlap the first radiation conductor 31 in plan view. That is, it is preferable that the first radiating conductor 31 and the second radiating conductor 32 do not overlap each other in the x direction and the y direction in plan view. According to this, since the mutual interference becomes smaller, the design becomes easier.

  As described above, in the dual-band patch antenna 10A according to the present embodiment, the first radiating conductor 31 and the second radiating conductor 32 are provided independently of each other. Even if it is changed, changes in the resonance frequency and impedance of the other radiation conductor can be suppressed. Thereby, compared with the conventional dual-band patch antenna, the antenna characteristics such as the resonance frequency and the impedance can be easily adjusted, so that the design is facilitated. In particular, in the dual-band patch antenna 10A according to the present embodiment, since the first radiating conductor 31 and the second radiating conductor 32 do not overlap each other in either the x direction or the y direction, mutual interference is prevented. It can be greatly reduced.

  Further, since both the first and second radiation conductors 31 and 32 are fed in common from the vertical feeding conductor 41, one feeding line for connecting the dual band patch antenna 10A according to the present embodiment and the RF circuit 100 is provided. It can be. This also facilitates the design of the feed line outside the dual-band patch antenna 10A. In addition, since the first radiating conductor 31 is directly fed from the vertical feeding conductor 41, even if the shape of the horizontal feeding conductor 51 or the second radiating conductor 32 is changed, the first radiating conductor 31 There is also an advantage that the antenna characteristics hardly change.

This effect is particularly noticeable in applications where the antenna characteristics change significantly due to slight changes in the pattern such as the wiring length and wiring position, such as when the resonance frequency is in the millimeter wave band, greatly reducing the design burden. Expected to be done.
Useful.

<Second Embodiment>
FIG. 5 is a schematic perspective view showing the configuration of a dual-band patch antenna 10B according to the second embodiment of the present invention. FIG. 6 is a plan view of the dual-band patch antenna 10B, and FIG. 7 is a side view of the dual-band patch antenna 10B viewed from the direction of arrow A shown in FIG.

  As shown in FIGS. 5 to 7, the dual-band patch antenna 10 </ b> B according to the present embodiment includes the dual-band patch antenna 10 </ b> A according to the first embodiment in that it further includes first and second excitation conductors 33 and 34. It is different. Since other configurations are basically the same as those of the dual-band patch antenna 10A according to the first embodiment, the same elements are denoted by the same reference numerals, and redundant description is omitted.

  The first excitation conductor 33 is a flat conductor formed on the conductor layer L6 located on the opposite side of the ground pattern 20 when viewed from the first radiation conductor 31, and is in the z direction with the first radiation conductor 31. Are arranged in parallel with the first radiation conductor 31. That is, the first excitation conductor 33 also has an xy plane, and has a structure in which the first radiation conductor 31 is sandwiched between the first excitation conductor 33 and the ground pattern 20. In the present embodiment, the first radiation conductor 31 and the first excitation conductor 33 have the same planar size.

  The second excitation conductor 34 is a flat conductor formed on the conductor layer L4 located on the side opposite to the ground pattern 20 when viewed from the second radiation conductor 32. The second excitation conductor 34 and the second radiation conductor 32 are in the z direction. Are arranged in parallel with the second radiation conductor 32. That is, the second excitation conductor 34 also has an xy plane, and has a structure in which the second radiation conductor 32 is sandwiched between the second excitation conductor 34 and the ground pattern 20. In the present embodiment, the planar size of the second excitation conductor 34 is slightly smaller than the second radiation conductor 32.

  The first and second excitation conductors 33 and 34 are in a floating state that is not connected to any wiring, and are excited by electromagnetic waves radiated from the first and second radiation conductors 31 and 32, respectively. Thereby, electromagnetic waves are also radiated from the first and second excitation conductors 33 and 34, so that the antenna band can be widened. The planar size of the first and second excitation conductors 33 and 34, the distance T3 between the first excitation conductor 33 and the first radiation conductor 31, and the distance between the second excitation conductor 34 and the second radiation conductor 32 About T4, what is necessary is just to design according to the radiation characteristic calculated | required by the 1st and 2nd excitation conductors 33 and 34. FIG.

  In the present embodiment, the first radiation conductor 31 and the first excitation conductor 33 are provided on the conductor layers L5 and L6, respectively, and the distance between both in the z direction is T3. The second radiation conductor 32 and the second excitation conductor 34 are provided on the conductor layers L3 and L4, respectively, and the distance between them in the z direction is T4. In the present embodiment, the distance T3 is shorter than the distance T4, but this point is not essential, and the distances T3 and T4 may be designed according to the target antenna characteristics. In order to obtain high radiation efficiency, the distance T3 is equal to or less than the wavelength of the first antenna resonance signal radiated from the first radiating conductor 31, and the distance T4 is radiated from the second radiating conductor 32. 2 or less of the wavelength of the antenna resonance signal.

<Third Embodiment>
FIG. 8 is a schematic perspective view showing the configuration of a dual-band patch antenna 10C according to the third embodiment of the present invention. FIG. 9 is a plan view of the dual-band patch antenna 10C, and FIG. 10 is a side view of the dual-band patch antenna 10C viewed from the direction of arrow A shown in FIG.

  As shown in FIGS. 8 to 10, the dual-band patch antenna 10 </ b> C according to the present embodiment further includes vertical feed conductors 43 and 44, a horizontal feed conductor 52, and an open stub 52 s. The vertical feed conductor 43 is a pillar-like conductor provided through another opening 22 provided in the ground pattern 20, and is connected to the RF circuit 100, similarly to the vertical feed conductor 41. Since other configurations are the same as those of the dual-band patch antenna 10B according to the second embodiment, the same elements are denoted by the same reference numerals, and redundant description is omitted.

  The vertical feeding conductor 43 is provided at a position overlapping the first radiation conductor 31, passes through the conductor layer L <b> 1 where the ground pattern 20 is formed, and is connected to a predetermined planar position of the first radiation conductor 31. The connection positions of the vertical feed conductors 41 and 43 with respect to the first radiation conductor 31 are different from each other. Specifically, the connection position of the vertical feed conductor 43 to the first radiation conductor 31 is a center position in the x direction of the first radiation conductor 31 and a position offset in the y direction.

  The horizontal power supply conductor 52 connects the vertical power supply conductor 43 and the vertical power supply conductor 44, and in this embodiment, has a portion extending in the x direction and a portion extending in the y direction. The horizontal power supply conductor 52 is formed in the wiring layer L2 like the horizontal power supply conductor 51.

  The vertical feed conductor 44 is a pillar-shaped conductor provided at a position overlapping the second radiation conductor 32, and connects the end of the horizontal feed conductor 52 and the second radiation conductor 32 at a predetermined plane position. The connection positions of the vertical feeding conductors 42 and 44 with respect to the second radiation conductor 32 are different from each other. Specifically, the connection position of the vertical feed conductor 44 to the second radiation conductor 32 is the center position in the y direction of the second radiation conductor 32 and is a position offset in the x direction.

  Further, an open stub 52 s is formed on the horizontal power supply conductor 52. One end of the open stub 52 s is connected to the horizontal feed conductor 52 and the other end is open, and the length thereof is about ¼ of the wavelength of the first antenna resonance signal radiated from the first radiating conductor 31. Designed to. Thereby, like the open stub 51s, the first antenna resonance signal conducted through the horizontal feeding conductor 52 can be cut off.

  Accordingly, the dual-band patch antenna 10C according to the present embodiment can supply two feeding signals having different phases to each of the first and second radiating conductors 31 and 32. The radiating conductors 31 and 32 can be used as a two-polarized antenna.

<Fourth Embodiment>
FIG. 11 is a schematic perspective view showing the configuration of a dual-band patch antenna 10D according to the fourth embodiment of the present invention.

  As shown in FIG. 11, the dual band patch antenna 10D according to the present embodiment has a shape in which the insulating layer 70 made of a dielectric material is selectively thick at the portion covering the first and second radiation conductors 31 and 32. Have. That is, the insulating layer 70 is thicker in the portion covering the first and second radiation conductors 31 and 32 than in the portion covering the horizontal power supply conductors 51 and 52. Since the other configuration is the same as that of the dual-band patch antenna 10C according to the third embodiment, the same elements are denoted by the same reference numerals, and redundant description is omitted.

  According to this embodiment, since the dielectric material is deleted at the plane position where the first and second radiation conductors 31 and 32 do not exist, the first and second radiation conductors 31 and 32 are radiated. The radiation direction of the beam is further reduced in the z direction. Thereby, the gain in the z direction can be increased.

<Fifth Embodiment>
FIG. 12 is a schematic perspective view showing the configuration of a dual-band patch antenna 10E according to the fifth embodiment of the present invention.

  As shown in FIG. 12, the dual-band patch antenna 10E according to the present embodiment includes two substrates 61 and 62, and the first radiation conductor 31, the first excitation conductor 33, and the ground pattern 20 are provided on one substrate 61. A part of the second radiation conductor 32, the second excitation conductor 34, and the remaining part of the ground pattern 20 are formed on the other substrate 62. The two substrates 61 and 62 are connected via a flexible substrate 80. The horizontal power supply conductors 51 and 52 extend from the substrate 61 to the substrate 62 via the flexible substrate 80, and open stubs 51 s and 52 s are formed on the flexible substrate 80. Since the other basic configuration is the same as that of the dual-band patch antenna 10C according to the third embodiment, the same elements are denoted by the same reference numerals, and redundant description is omitted.

  In the example shown in FIG. 12, the entire dual band patch antenna 10 </ b> E is bent by 90 ° by the flexible substrate 80. That is, the substrate 61 constitutes the xy plane, while the substrate 62 constitutes the yz plane. For this reason, the first radiation conductor 31 faces the z direction, and the second radiation conductor 32 faces the x direction. Thus, according to the present embodiment, it is possible to emit a beam in a plurality of directions.

  The bending angle using the flexible substrate 80 does not need to be 90 °, and can be bent at an arbitrary angle. Further, the substrates 61 and 62 and the flexible substrate 80 do not have to be separate members, and these may be integrated, and the portion may be made flexible by partially reducing the thickness of the substrate.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. Needless to say, it is included in the range.

  For example, in each of the above-described embodiments, the dual band patch antenna having two radiation conductors has been described as an example. However, it is also possible to configure an antenna having three or more bands by providing three or more radiation conductors.

10A, 10B, 10C, 10D, 10E Dual band patch antenna 20 Ground patterns 21, 22 Opening 31 First radiation conductor 32 Second radiation conductor 33 First excitation conductor 34 Second excitation conductor 41 First vertical Feed conductor 42 Second vertical feed conductor 43 Third vertical feed conductor 44 Fourth vertical feed conductor 51 First horizontal feed conductor 52 Second horizontal feed conductors 51s, 52s Open stubs 60 to 62 Substrate 70 Insulating layer 80 Flexible substrate 100 RF circuit Ax, Ay Arrangement range L1-L6 Conductor layer Px, Py Vibration direction

Claims (16)

A ground pattern having a first opening;
A pillar-shaped first vertical feed conductor provided through the first opening;
A first radiating conductor overlapping the ground pattern at a position covering the first vertical feeding conductor and connected to the first vertical feeding conductor;
A first horizontal feed conductor connected to the first vertical feed conductor;
A second radiating conductor that overlaps with the ground pattern at a position not covering the first vertical feeding conductor and is connected to the first vertical feeding conductor via the first horizontal feeding conductor. Features a dual-band patch antenna.   The dual-band patch antenna according to claim 1, further comprising a first open stub having one end connected to the first horizontal feed conductor and the other end open. A pillar-shaped second vertical feed conductor covered with the second radiation conductor;
The one end of the second vertical feed conductor is connected to the first horizontal feed conductor, and the other end of the second vertical feed conductor is connected to the second radiation conductor. Or the dual band patch antenna of 2. A pillar-shaped third vertical feed conductor provided through the second opening of the ground pattern;
A second horizontal power supply conductor connected to the third vertical power supply conductor,
The first radiating conductor covers the first and third vertical feeding conductors and is connected to the first and third vertical feeding conductors at different plane positions;
The second radiation conductor is provided at a position that does not cover the first and third vertical feed conductors, and is further connected to the second vertical feed conductor via the second horizontal feed conductor. The dual-band patch antenna according to any one of claims 1 to 3, wherein the dual-band patch antenna is provided.   The dual-band patch antenna according to claim 4, further comprising a second open stub having one end connected to the second horizontal feed conductor and the other end open. A pillar-shaped fourth vertical feed conductor covered with the second radiation conductor;
One end of the fourth vertical power supply conductor is connected to the second horizontal power supply conductor, and the other end of the fourth vertical power supply conductor is located at a plane position different from that of the second vertical power supply conductor. The dual-band patch antenna according to claim 4 or 5, wherein the dual-band patch antenna is connected to a radiating conductor. The first and second radiation conductors have sides extending along a first direction and sides extending along a second direction orthogonal to the first direction;
The first radiation conductor and the second radiation conductor do not overlap each other in any of the first and second directions in a plan view. A dual-band patch antenna according to claim 1.   The dual-band patch antenna according to any one of claims 1 to 7, wherein a distance between the ground pattern and the first radiation conductor is different from a distance between the ground pattern and the second radiation conductor. . The distance between the ground pattern and the first radiation conductor is equal to or less than the wavelength of the first antenna resonance signal radiated from the first radiation conductor;
The dual-band patch antenna according to claim 8, wherein a distance between the ground pattern and the second radiation conductor is equal to or less than a wavelength of a second antenna resonance signal radiated from the second radiation conductor. . A first excitation conductor that is located on the opposite side of the ground pattern as viewed from the first radiation conductor and is disposed in parallel with the first radiation conductor so as to overlap the first radiation conductor;
A second excitation conductor located on the opposite side of the ground pattern as viewed from the second radiation conductor and disposed in parallel with the second radiation conductor so as to overlap the second radiation conductor; The dual-band patch antenna according to any one of claims 1 to 9, further comprising:   The dual band patch antenna according to claim 10, wherein the first and second excitation conductors are in a floating state.   The dual-band patch antenna according to claim 11, wherein a distance between the first radiation conductor and the first excitation conductor is different from a distance between the second radiation conductor and the second excitation conductor.   The dual band patch according to any one of claims 1 to 12, wherein the first vertical feed conductor and the first and second radiation conductors are embedded with a dielectric material. antenna.   14. The dual band patch according to claim 13, wherein the dielectric material is thicker in a portion covering the first and second radiation conductors than in a portion covering the first horizontal feed conductor. antenna.   The dual-band patch antenna according to any one of claims 1 to 14, wherein the first radiating conductor and the second radiating conductor are oriented in different directions. Of the first radiation conductor and the ground pattern, a portion overlapping the first radiation conductor is formed on the first substrate,
Of the second radiation conductor and the ground pattern, a portion overlapping the second radiation conductor is formed on the second substrate,
The dual-band patch antenna according to claim 15, wherein the first substrate and the second substrate are connected via a flexible substrate.

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