Antenna unit

Abstract

The present invention provides an antenna unit that can suitably widen the beam width by 3 dB. [Solution] The antenna unit comprises a single feeding antenna provided in a dielectric and a pair of parasitic antennas provided in the dielectric on one side and the other side with respect to the single feeding antenna. The feeding antenna has a feeding body that includes a feeding line and a radiating element fed from the feeding line. The pair of parasitic antennas consist of a first parasitic antenna provided on one side and a second parasitic antenna provided on the other side with respect to the single feeding antenna, and each parasitic antenna includes a parasitic body that is substantially the same shape as the feeding body and a phase adjustment line extending from its end. The single feeding antenna is a horizontally polarized antenna, with a free-space wavelength λ, a dielectric wavelength λg, and the sum of the two λe, and the sum of the first pitch and first length, and the sum of the second pitch and second length are between 0.75λe+[(λ / 2)×n] and 1.05λe+[(λ / 2)×n] (where n is an integer of 0 or more).

Description

Technical Field

[0001] The present invention relates to an antenna unit.

Background Art

[0002] Patent Document 1 discloses an example of an antenna unit. This antenna unit includes a plurality of feeding antennas provided on a dielectric body, and non-feeding antennas provided on both sides of the plurality of feeding antennas. a plurality of feeding antennas provided on a dielectric body, and non-feeding antennas provided on both sides of the plurality of feeding antennas

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above antenna unit, the angular beam width in the range where the maximum gain of the main lobe is 3 dB lower, in other words, the 3 dB beam width, has not been studied. Therefore, there is still room for improvement in widening the 3 dB beam width. the angular beam width in the range where the maximum gain of the main lobe is 3 dB lower, in other words, the 3 dB beam width, has not been studied. Therefore, there is still room for improvement in widening the 3 dB beam width.

[0005] An object of the present invention is to provide an antenna unit capable of suitably widening the 3 dB beam width.

Means for Solving the Problems

[0006] The antenna unit according to the first aspect of the present invention includes a single feeding antenna provided on a dielectric body, and a pair of non-feeding antennas provided on one side and the other side of the single feeding antenna in the dielectric body. The feeding antenna includes a feeding line, and the feeding line a single feeding antenna provided on a dielectric body, and a pair of non-feeding antennas provided on one side and the other side of the single feeding antenna in the dielectric body ​​​​The power supply unit includes a radiating element that is powered from the circuit, and the pair of unpowered antennas are the It includes a non-powered main body which has substantially the same shape as the power supply main body, and the power supply antenna and the pair The pitch of the unpowered antenna is substantially equal, and when the free-space wavelength is λ, the pitch of the unpowered antenna is substantially equal to the free-space wavelength. The interval is included in the range of 0.4λ + [(λ / 2) × n] or more and 0.6λ + [(λ / 2) × n] or less. It can be (where n is a non-negative integer).

[0007] If the above antenna unit is used, for example, for transmission, then a single feed antenna or The radio waves emitted propagate to a pair of passive antennas. The pair of passive antennas are single It emits radio waves with a different phase from the radio waves emitted by the feed antenna. (0° horizontal angle) In this case, the radio waves emitted by a single powered antenna and the radio waves emitted by a pair of unpowered antennas Because there is a phase difference with the radio waves, it is more powerful than conventional antenna units that only have a feed antenna. The gain of the frame width decreases. On the other hand, in the diagonal direction of the horizontal angle, for example 45°, single The radio waves emitted by the powered antenna and the radio waves emitted by the pair of unpowered antennas are combined. Therefore, the beam width gain is higher than that of conventional antenna units that only have a feed antenna. The inventors of this application make the pitch of the fed antenna and the pair of unfed antennas equal, Furthermore, by setting the pitch to fall within the above range, a 3dB beam width is preferable. They discovered that it would spread.

[0008] An antenna unit according to a second aspect of the present invention is an antenna unit according to a first aspect. The single-feed antenna is a horizontally polarized antenna, and its pitch is 2λ or less. ru.

[0009] When the power feeding antenna is a horizontally polarized antenna, by setting the pitch to 2λ or less, it was confirmed that the 3dB beam width spreads favorably.

[0010] The antenna unit according to the third aspect of the present invention is the antenna unit according to the first aspect, wherein the single power feeding antenna is a vertically polarized antenna, and the pitch is 1λ or less.

[0011] When the power feeding antenna is a vertically polarized antenna, by setting the pitch to 1λ or less, it was confirmed that the 3dB beam width spreads favorably.

[0012] The antenna unit according to the fourth aspect of the present invention includes a single power feeding antenna provided in a dielectric, and a pair of parasitic antennas provided on one side and the other side of the single power feeding antenna in the dielectric, wherein the power feeding antenna includes a power feeding line and a power feeding main body portion including a radiating element fed from the power feeding line, the pair of parasitic antennas include a first parasitic antenna provided on one side of the single power feeding antenna, and a second parasitic antenna provided on the other side of the single power feeding antenna, the first parasitic antenna and the second parasitic antenna include a parasitic main body portion having substantially the same shape as the power feeding main body portion, and a phase adjustment line extending from an end of the parasitic main body portion, the single power feeding antenna is a horizontally polarized antenna, the free space wavelength is λ, the wavelength in the dielectric is λg, and the sum of λ and λg is λe, the pitch between the power feeding antenna and the first parasitic antenna is the first pitch, the pitch between the power feeding antenna and the second parasitic antenna is the second pitch, the length of the phase adjustment line of the first parasitic antenna is the first length, and the second parasitic antenna's... Let the sum of λ and λg be λe, the pitch between the power feeding antenna and the first parasitic antenna be the first pitch, the pitch between the power feeding antenna and the second parasitic antenna be the second pitch, the length of the phase adjustment line of the first parasitic antenna be the first length, and the length of the phase adjustment line of the second parasitic antenna be the second length...​ When the length of the phase adjustment line of the power supply antenna is the second length, the sum of the first pitch and the first length, and the sum of the second pitch and the second length are included in the range of 0.75λe + [(λ / 2) × n] or more and 1.05λe + [(λ / 2) × n] or less (where n is an integer of 0 or more).

[0013] According to the above antenna unit, the same effect as that obtained by the antenna unit of the first aspect can be obtained. Furthermore, in the above antenna unit, by adjusting the pitch between the single power supply antenna and the pair of non-powered antennas, the amplitude of the re-radiated radio wave can be adjusted. Also, by adjusting the length of the phase adjustment lines of the pair of non-powered antennas, the phase of the re-radiated radio wave can be adjusted. Therefore, even when it is not possible to sufficiently secure the pitch between the single power supply antenna and the pair of non-powered antennas due to the convenience of the installation space or the like, the directivity of the radio wave can be suitably adjusted. Also, according to the above antenna unit, it has been confirmed that the 3dB beam width spreads suitably.

[0014] The antenna unit according to the fifth aspect of the present invention includes a single power supply antenna provided on a dielectric and, in the dielectric, a pair of non-powered antennas provided on one side and the other side with respect to the single power supply antenna. The power supply antenna includes a power supply body portion including a power supply line and a radiation element powered from the power supply line. The pair of non-powered antennas includes a first non-powered antenna provided on one side with respect to the single power supply antenna and a second non-powered antenna provided on the other side with respect to the single power supply antenna. The first non-powered antenna and the second non-powered antenna have a non-powered antenna body that is substantially the same shape as the power supply body portion. ​​​​​​​​ The main body and the phase adjustment line extending from the end of the unpowered main body are included, and the single power supply An electric antenna is a vertically polarized antenna, where the free-space wavelength is λ and the wavelength within the dielectric is λg. Let λe be the sum of λ and λg, and the pitch of the feeding antenna and the first unfed antenna Let the first pitch be , and the pitch between the powered antenna and the second unpowered antenna be the second pitch Let the length of the phase adjustment line of the first unpowered antenna be the first length, and the second unpowered When the length of the phase adjustment line of the feed antenna is set to the second length, the first pitch and the The sum of the length and the second pitch and the second length is 0.35λe + [(λ / 2) It falls within the range of [(λ / 2) × n] and 0.7λe + [(λ / 2) × n] (where n is 0 (An integer greater than or equal to the above).

[0015] According to the above antenna unit, the effect obtained by the antenna unit from the fourth perspective is Similar effects can be achieved.

[0016] An antenna unit according to the sixth aspect of the present invention is an antenna according to the fourth or fifth aspect of the present invention. A unit in which the first pitch and the second pitch are different, and the first length is Unlike the aforementioned second length, the sum of the aforementioned first pitch and the aforementioned first length, and the aforementioned second pitch The sum of the second lengths is substantially equal to this.

[0017] According to the above antenna unit, it was confirmed that the beam width is optimally widened by 3 dB. [Effects of the Invention]

[0018] According to the antenna unit of the present invention, the beam width can be suitably widened by 3 dB. ru. [Brief explanation of the drawing]

[0019] [Figure 1] A plan view of the antenna unit according to the first embodiment. [Figure 2] A cross-sectional view along the line D2-D2 in Figure 1. [Figure 3] Figure 2 is a cross-sectional view showing the state where the power from the fed antenna has propagated to the unfed antenna. [Figure 4] Figure 3 shows a cross-sectional view of the unpowered antenna emitting radio waves. [Figure 5] Figure 4 shows a cross-sectional view of the combined state of radio waves emitted by the powered antenna and the unpowered antenna. [Figure 6] Simulation results regarding the directivity of the antenna unit of the first embodiment. [Figure 7] Simulation results regarding the directivity of the antenna unit of a modified version of the first embodiment. [Figure 8] A plan view of the antenna unit according to the second embodiment. [Figure 9] Simulation results regarding the directivity of the antenna unit in the second embodiment. [Figure 10] A plan view of the antenna unit according to the third embodiment. [Figure 11] Simulation results regarding the directivity of the antenna unit of the third embodiment. [Figure 12] Simulation results regarding the directivity of the antenna unit of a modified example of the third embodiment. [Figure 13] Plan view of a modified antenna unit. [Figure 14] A plan view of another modified antenna unit. [Modes for carrying out the invention]

[0020] Embodiments of the present invention will be described in detail below with reference to the drawings. The same reference numeral is used for one or a corresponding part, and its explanation is not repeated.

[0021] [1. First Embodiment] <1-1. Overall configuration of the antenna unit> Figure 1 is a plan view of the antenna unit 10 of this embodiment. The antenna unit 10 is For example, it is a transmitting antenna unit that transmits radio waves to a receiving antenna (not shown). The antenna unit 10 may also be a receiving antenna unit. 10 comprises a single feeding antenna 20 and a pair of unfeeded antennas 50. The electric antenna 20 and the pair of passive antennas 50 are arranged side by side in the plane of the dielectric 100. It can be removed. The dielectric 100 is in the form of a plate, and for example, epoxy resin, glass, or Teflon It is composed of Ron (registered trademark), etc. Among the dielectric 100, a single feed antenna 20 And on the side opposite to the side on which the pair of unpowered antennas 50 are provided, there is a ground. A metal foil 110 is joined to it. The metal foil 110 is, for example, copper foil. In the following, A In a plan view of the antenna unit 10, there is a single powered antenna 20 and a pair of unpowered antennas. The direction in which the antenna 50 extends is called the longitudinal direction, and in a plan view, the direction perpendicular to the longitudinal direction. This is referred to as the width direction.

[0022] In this embodiment, a single feeding antenna 20 (hereinafter simply referred to as "feeding antenna 20") (u) is a horizontally polarized antenna. The feed antenna 20 may be a vertically polarized antenna. The feed antenna 20 is, for example, a microstrip antenna. Unit 0 comprises a power supply main unit 30 and a stub 40.

[0023] The power supply unit 30 includes a power supply line 31 and a radiating element 32 that is powered from the power supply line 31. It has a transducer (Figure 31) provided at the end of a waveguide, for example. (Diagram omitted) is connected via a stub 40. The converter converts power between the waveguide and the stub 40. The converter is used as the power supply point to the power supply line 31 via the stub 40. Power supply line 31 For example, this is a planar transmission line, which is a conductive thin film formed on the dielectric 100.

[0024] The radiating element 32 is connected to the power supply line 31 and protrudes from the power supply line 31 in one direction in the width direction. The radiating element 32 is, for example, a planar antenna, and is made of a conductive thin film formed on the dielectric 100. Yes. The number of radiating elements 32 in the power supply unit 30 can be arbitrarily selected. The power supply unit 30 has 6 radiating elements. The power supply unit 30 has 1 to 5 elements, It may have seven or more radiating elements. In this embodiment, six in the longitudinal direction The length XA of the radiating element 32 is approximately the same as the radiating element 32 located near the center of the longitudinal direction of the feed antenna 20. long.

[0025] In the feed antenna 20, the feed line 31 is the line that goes to the radiating element 32A on the feed side. In this embodiment, the power supply unit 30 includes a power supply line 31 and six radiating elements 3 This is the part that includes 2.

[0026] The stub 40 extends from the end of the power supply body 30. The stub 40 is made of, for example, a dielectric 10 It is a conductive thin film formed on 0. The middle part of the stub 40 is to suppress the reflection of radio waves. A matching pattern 41 is formed.

[0027] The pair of unpowered antennas 50 are provided on one side relative to the powered antenna 20 in the width direction. A first unpowered antenna 71 is provided, and a second unpowered antenna is provided on the other side relative to the feeding antenna 20. It has an electric antenna 72 and a first passive antenna 71 and a second passive antenna 72. , the configuration is similar. Below, the first passive antenna 71 and the second passive antenna 72 When no particular distinction is made, it may simply be referred to as a non-powered antenna 50.

[0028] Unlike the powered antenna 20, the unpowered antenna 50 is not connected to the converter. Therefore, the unpowered antenna 50 is not fed. It has a non-powered main body 60 which is substantially the same shape as the main body 30. The non-powered main body 60 is non-powered It has a power line 61 and a radiating element 62 connected to the unpowered power line 61. The unpowered power line 61 is For example, it is a planar transmission line and a conductive thin film formed on the dielectric 100.

[0029] The radiating element 62 protrudes from the unpowered transmission line 61 in one direction in the width direction. It is a planar antenna and a conductive thin film formed on the dielectric 100. Unpowered main body 6 The number of radiating elements 62 that 0 has can be arbitrarily selected. In this embodiment, the unpowered main unit 60 has six radiating elements. The unpowered main body 60 has 1 to 5 or 7 or more elements. It may have radiating elements. In this embodiment, six radiating elements 62 in the longitudinal direction Length XB is approximately as long as the radiating element 62 near the center in the longitudinal direction of the unpowered antenna 50. In this configuration, the unpowered main body 60 includes an unpowered line 61 and six radiating elements 62. It's minutes.

[0030] In this embodiment, the pitch between the feeding antenna 20 and the first unfed antenna 71 in the width direction The pitch LA and the pitch RA of the feed antenna 20 and the second unfed antenna 72 are substantially equal. Furthermore, in this embodiment, from the viewpoint of suitably widening the 3dB beam width, the free-space wavelength is When λ is the pitch, LA and RA are greater than or equal to 0.4λ + [(λ / 2) × n] and 0.6λ + [( It is included in the range less than or equal to [λ / 2) × n], where n is a non-negative integer. In particular, i If the solation is 50 dB or less, the pair of unpowered antennas 50 will be connected from the powered antenna 20. Because the intensity of the radio waves propagating through it is high, the beam width can be more effectively widened by 3 dB. In order to keep the isolation below 50 dB, the feed antenna 20 is a horizontally polarized antenna. In some cases, the pitch LA and RA are preferably 2λ or less, and the feed antenna 20 is For vertically polarized antennas, it is preferable that the pitch LA and RA are 1λ or less. The free-space wavelength is, for example, 12.49 mm at 24 GHz.

[0031] <1-2. Function and Effects of the Antenna Unit> The operation and effects of the antenna unit 10 will be explained with reference to Figures 2 to 5. Figures 2-5 are cross-sectional views along the line D2-D2 in Figure 1.

[0032] As shown in Figure 2, the feed antenna 20 radiates radio waves WA. As shown in Figure 3... Therefore, the radio wave WA propagates to a pair of unpowered antennas 71 and 72, as shown in Figure 4. The pair of unpowered antennas 71 and 72 are in phase with the radio wave WA radiated by the powered antenna 20. It emits different radio wave WBs. As shown by the bidirectional arrows in Figure 5, the horizontal angle is directly in front (0°). In this case, the radio waves radiated by the powered antenna 20 and the pair of unpowered antennas 71 and 72 Because there is a phase difference with the radiated radio wave WB, conventional antenna units that only have a feed antenna The beam width gain is lower than with a standard beam. On the other hand, in the diagonal direction of the horizontal angle, for example at 45°, In this case, the radio wave WA emitted by the powered antenna 20 and the pair of unpowered antennas 71 and 72 emit Because the emitted radio waves and WB are combined, a conventional antenna unit having only a feed antenna... The beam width gain is increased compared to the previous configuration. The inventors of this application have provided a pair of unpowered antennas with a powered antenna 20. The pitches LA and RA of the electric antennas 71 and 72 are made equal, and the pitches LA and RA are predetermined. By setting it to fall within this range, the 3dB beam width is found to be suitably widened. I took it out.

[0033] <1-3. Simulation results of the antenna unit> Figure 6 shows a conventional antenna unit having only a feed antenna and the antenna of this embodiment. This is the simulation result regarding the directivity of unit 10. The antenna unit of this embodiment The 10 has a 3dB beamwidth of 132°. Conventional antenna units have a 3dB beamwidth. The width is 107°. Therefore, the antenna unit 10 of this embodiment is different from conventional antennas. It was confirmed that the beam width could be increased by 3 dB and 23.4% compared to the N-Unit.

[0034] Figure 7 shows a conventional antenna unit having only a power supply antenna and a modified example of this embodiment. This is a simulation result regarding the directivity of the antenna unit 10. An example is shown in Figure 7. In this modified example, the feed antenna 20 of the antenna unit 10 is a vertically polarized antenna. The modified antenna unit 10 has a 3dB beamwidth of 105°. The nit has a 3dB beamwidth of 69°. Therefore, the modified antenna unit 10 is It was confirmed that the beam width can be increased by 3dB and 52.2% compared to conventional antenna units. Ta.

[0035] [2. Second Embodiment] The antenna unit 200 of the second embodiment is equipped with a pair of passive antennas 250. In contrast to the first embodiment, the other configurations are the same as in the first embodiment. Regarding the antenna unit 200 of the second embodiment, we will focus on the parts that differ from those of the first embodiment. explain.

[0036] <2-1. Overall configuration of the antenna unit> Figure 8 is a plan view of the antenna unit 200 of the second embodiment. Antenna unit 2 00 comprises a pair of passive antennas 250. The pair of passive antennas 250 are in the width direction In this configuration, a first unpowered antenna 271 is provided on one side relative to the feed antenna 20, and The system includes a second unpowered antenna 272 provided on the other side of the electric antenna 20. The unpowered antenna 271 and the second unpowered antenna 272 have similar configurations. If the first passive antenna 271 and the second passive antenna 272 are not particularly distinguished, It is sometimes referred to as the unpowered antenna 250.

[0037] The unpowered antenna 250 has an unpowered main body 60 and a phase adjustment line 280. The adjustment line 280 extends from the end of the unpowered main unit 60. The phase adjustment line 280 is, for example, , a conductive thin film formed on the dielectric 100. In this embodiment, the phase adjustment line 280 Termination 280X is open.

[0038] In this embodiment, the length LAX of the phase adjustment line 280 of the first unpowered antenna 271 and the The length RAX of the phase adjustment line 280 of the unpowered antenna 272 is equal to the length RAX of the phase adjustment line 280 of the unpowered antenna 272. First Embodiment Similarly, pitch LA and pitch RA are equal. Therefore, pitch LA and length LAX are equal. The sum SL is equal to the sum SR, which is the sum of pitch RA and length RAX.

[0039] <2-2. Effects of the Antenna Unit> According to the antenna unit 200 of this embodiment, the antenna unit 10 of the first embodiment The same effect can be obtained. Furthermore, in the antenna unit 200, the feed antenna 2 By adjusting the pitch LA and RA of 0 and a pair of unpowered antennas 250, re-radiation is achieved. The amplitude of the radio waves can be adjusted. Also, the length of the phase adjustment line 280 of the pair of unpowered antennas 250. By adjusting LAX and RAX, the phase of the re-radiated radio waves can be adjusted. Therefore, Due to space limitations and other factors, the pair of powered antennas 20 and the pair of unpowered antennas 250 Even when sufficient LA and RA cannot be secured, the directivity can be suitably adjusted.

[0040] <2-3. Simulation results of the antenna unit> Figure 9 shows a conventional antenna unit having only a feed antenna and the antenna of this embodiment. This is the simulation result regarding the directivity of unit 200. The antenna unit of this embodiment The Knit 200 has a 3dB beamwidth of 131°. Conventional antenna units have a 3dB beamwidth. The beam width is 107°. Therefore, the antenna unit 200 of this embodiment is different from conventional It was confirmed that the beam width could be increased by 3dB and 22.4% compared to the antenna unit.

[0041] [3. Third Embodiment] The antenna unit 300 of the third embodiment is equipped with a pair of passive antennas 350. In contrast to the second embodiment, the other configurations are the same as in the second embodiment. Regarding the antenna unit 300 of the third embodiment, we will focus on the parts that differ from those of the second embodiment. explain.

[0042] <3-1. Overall configuration of the antenna unit> Figure 10 is a plan view of the antenna unit 300 of the third embodiment. Antenna unit The 300 is equipped with a pair of passive antennas 350. The pair of passive antennas 350 are oriented in the width direction In this configuration, a first unpowered antenna 371 is provided on one side relative to the powered antenna 20, It has a second unpowered antenna 372 provided on the other side of the powered antenna 20. In the following, the first passive antenna 371 and the second passive antenna 372 are not particularly distinguished. In some cases, it is simply referred to as the unpowered antenna 350.

[0043] The unpowered antenna 350 has an unpowered main body 60 and a phase adjustment line 380. The adjustment line 380 extends from the end of the unpowered main unit 60. The phase adjustment line 380 is, for example, , a conductive thin film formed on the dielectric 100. In this embodiment, the phase adjustment line 380 Termination 380X is open.

[0044] In this embodiment, the length LAX of the phase adjustment line 380 of the first unpowered antenna 371 and the The length RAX of the phase adjustment line 380 of the unpowered antenna 372 is different. In this embodiment, length LAX is longer than length RAX. This is different. In this embodiment, pitch LA is shorter than pitch RA. The sum of pitch LA and length LAX, SL, and the sum of pitch RA and length RAX, SR, are equal. It is preferable.

[0045] As shown in Figure 10, when the feed antenna 20 is a horizontally polarized antenna, 3d From the viewpoint of appropriately widening the B beam width, the free-space wavelength is λ, and the wavelength within the dielectric 100 is λg. And, when the sum of λ and λg is λe, the sum SL and sum SR are 0.75λe + [(λ It is included in the range of (λ / 2)×n] and 1.05λe+[(λ / 2)×n], where n is , is a non-negative integer. Note that the wavelength within the dielectric 100 is, for example, 24 GHz. It is 7.95 mm.

[0046] If the feed antenna 20 is a vertically polarized antenna, the beam width is preferably widened by 3 dB. From this perspective, the free-space wavelength is λ, the wavelength within the dielectric 100 is λg, and the sum of λ and λg When λe is denoted by λe, the sums SL and SR are greater than or equal to 0.35λe + [(λ / 2) × n] and 0.7 It is included in the range less than or equal to λe + [(λ / 2) × n], where n is a non-negative integer.

[0047] <3-2. Simulation results of the antenna unit> Figure 11 shows a conventional antenna unit having only a feed antenna and the antenna of this embodiment. This is a simulation result regarding the directivity of the Na Unit 300. The antenna of this embodiment. Unit 300 has a 3dB beamwidth of 128°. Conventional antenna units have a 3d The B beam width is 107°. Therefore, the antenna unit 300 of this embodiment is conventional It was confirmed that the beamwidth could be increased by 3dB and 19.6% compared to the previous antenna unit.

[0048] Figure 12 shows a conventional antenna unit having only a power supply antenna and a modified example of this embodiment. This is the simulation result regarding the directivity of the antenna unit 300. (Figure 12 shows) In this example, the feed antenna 20 of the modified antenna unit 300 is a vertically polarized antenna. The modified antenna unit 300 has a 3dB beamwidth of 107°. The antenna unit has a 3dB beamwidth of 69°. Therefore, the modified antenna unit The 300 can widen the beam width by 3dB and 55.1% compared to conventional antenna units. This was confirmed.

[0049] <4. Variation> The above embodiments are examples of the forms that the antenna unit according to the present invention can take, and The form is not intended to be limited. The antenna unit according to the present invention is in each embodiment. It may take a form different from the form exemplified therein. One example is to place a part of the configuration of each embodiment. In a modified, altered, or abbreviated form, or in a form in which a new configuration is added to each embodiment. Yes. Several examples of modifications of each embodiment are shown below. Note that the above embodiments and the following Modifications of this can be combined with each other as long as they are not technically contradictory.

[0050] <4-1> In the second embodiment, the termination 280X of the phase adjustment line 280 of the unpowered antenna 250 is , and can be changed as needed. As shown in Figure 13, for example, the termination of the phase adjustment line 280 Alternatively, a through-hole 280Y can be formed in 280X, and the termination 280X can be connected to ground. i. As shown in Figure 14, for example, a resistor 280 is attached to the termination 280X of the phase adjustment line 280 A configuration can be made in which Z, etc. are placed so that radio waves are not reflected. In the example shown in Figure 14, pitch By adjusting LA and pitch RA, the timing of radio wave re-emission can be adjusted. Preferred. These modifications are also applicable to the antenna unit 300 of the third embodiment. Cut.

[0051] <4-2> In the third embodiment, the length LAX is made shorter than the length RAX, and the pitch LA is pitch It may be longer than RA. In this variation, it is preferable that the sum SL and the sum SR are equal. stomach. [Explanation of Symbols]

[0052] 10, 200, 300: Antenna Unit 20: Power supply antenna 30: Power supply unit 31: Power supply line 32: Radiation element 50, 250, 350: Unpowered antennas 60: Power supply unit 61: Power supply line 62: Radiation element 71, 271, 371: First unpowered antenna 72, 272, 372: Second unpowered antenna 100: Dielectric 280, 380: Phase adjustment line

Claims

1. A single feed antenna provided in a dielectric, The dielectric comprises a pair of passive antennas provided on one and the other with respect to the single feeding antenna, The aforementioned power supply antenna includes a power supply line and a power supply body that includes a radiating element supplied with power from the power supply line. The pair of passive antennas comprises a first passive antenna provided on one side relative to the single feeding antenna, and a second passive antenna provided on the other side relative to the single feeding antenna. The first passive antenna and the second passive antenna each include a passive body having substantially the same shape as the feeding body, and a phase adjustment line extending from the end of the passive body. The aforementioned single-feed antenna is a horizontally polarized antenna. Let λ be the free-space wavelength, λg be the wavelength within the dielectric, and λe be the sum of λ and λg. The pitch between the aforementioned powered antenna and the first unpowered antenna is defined as the first pitch. The pitch between the aforementioned feeding antenna and the second unfed antenna is set to the second pitch. The length of the phase adjustment line of the first unpowered antenna is defined as the first length. When the length of the phase adjustment line of the second unpowered antenna is set to the second length, The sum of the first pitch and the first length, and the sum of the second pitch and the second length, It falls within the range of 0.75λe + [(λ / 2) × n] or greater and 1.05λe + [(λ / 2) × n] or less (where n is a non-negative integer). Antenna unit.

2. A single feed antenna provided in a dielectric, The dielectric comprises a pair of passive antennas provided on one and the other with respect to the single feeding antenna, The aforementioned power supply antenna includes a power supply line and a power supply body that includes a radiating element supplied with power from the power supply line. The pair of passive antennas comprises a first passive antenna provided on one side relative to the single feeding antenna, and a second passive antenna provided on the other side relative to the single feeding antenna. The first passive antenna and the second passive antenna are substantially connected to the power supply unit. A non-powered main body having the same shape, and a phase adjustment line extending from the end of the non-powered main body. Includes, The aforementioned single-feed antenna is a vertically polarized antenna, Let λ be the free-space wavelength, λg be the wavelength within the dielectric, and λe be the sum of λ and λg. The pitch between the aforementioned powered antenna and the first unpowered antenna is defined as the first pitch. The pitch between the aforementioned feeding antenna and the second unfed antenna is set to the second pitch. The length of the phase adjustment line of the first unpowered antenna is defined as the first length. When the length of the phase adjustment line of the second unpowered antenna is set to the second length, The sum of the first pitch and the first length, and the sum of the second pitch and the second length, It falls within the range of 0.35λe + [(λ / 2) × n] or greater and 0.7λe + [(λ / 2) × n] or less (where n is a non-negative integer). Antenna unit.

3. The first pitch and the second pitch are different, The first length and the second length are different, The sum of the first pitch and the first length, and the sum of the second pitch and the second length are, Qualitatively equivalent The antenna unit according to claim 1 or 2.

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