WO2022195801A1 - Dispositif d'antenne et dispositif de communication sans fil - Google Patents

Dispositif d'antenne et dispositif de communication sans fil Download PDF

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Publication number
WO2022195801A1
WO2022195801A1 PCT/JP2021/011069 JP2021011069W WO2022195801A1 WO 2022195801 A1 WO2022195801 A1 WO 2022195801A1 JP 2021011069 W JP2021011069 W JP 2021011069W WO 2022195801 A1 WO2022195801 A1 WO 2022195801A1
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WO
WIPO (PCT)
Prior art keywords
antenna device
antenna
front wall
holes
substrate
Prior art date
Application number
PCT/JP2021/011069
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English (en)
Japanese (ja)
Inventor
泰光 伴
学 吉川
洋平 古賀
Original Assignee
Ｆｃｎｔ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ｆｃｎｔ株式会社 filed Critical Ｆｃｎｔ株式会社
Priority to JP2023506623A priority Critical patent/JPWO2022195801A1/ja
Priority to PCT/JP2021/011069 priority patent/WO2022195801A1/fr
Publication of WO2022195801A1 publication Critical patent/WO2022195801A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/02—Refracting or diffracting devices, e.g. lens, prism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/06—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path

Definitions

  • the present invention relates to an antenna device and a wireless communication device.
  • a "beamforming" method is used to change the directivity of the emitted millimeter waves by giving a phase difference to the signal that feeds each antenna.
  • the pillars formed in the through-holes By thickening the pillars formed in the through-holes, the decrease in rigidity of the housing is suppressed, but the performance of the antenna deteriorates. Also, by thinning the pillars formed in the through holes, deterioration of the performance of the antenna is suppressed, but the rigidity of the housing is reduced. Further, when a pillar is provided in the through-hole, deterioration of antenna performance during beam forming is remarkable.
  • An object of one aspect of the disclosed technology is to provide an antenna device and a wireless communication device capable of suppressing deterioration of antenna performance in beamforming.
  • This antenna device consists of an antenna module in which a plurality of patch antennas for emitting millimeter waves are arranged side by side on the same plane of a substrate, and a pair of metal antennas arranged at both ends in the direction in which the plurality of patch antennas are arranged. a side wall; and a metal front wall provided in the millimeter wave emitting direction and formed with a plurality of through holes respectively corresponding to the plurality of patch antennas, wherein the plurality of through holes correspond to the above They are spaced wider than multiple patch antennas.
  • the disclosed technology can suppress deterioration of antenna performance in beamforming.
  • FIG. 1 is a diagram illustrating an example of an antenna device according to an embodiment.
  • FIG. 2 is a diagram showing the configuration of a millimeter wave antenna module.
  • FIG. 3 is a front view of the antenna device according to the embodiment. 4 is an end view showing an end face taken along line AA of FIG. 3.
  • FIG. 5 is a diagram showing an example of an antenna device according to a first comparative example.
  • FIG. 6 is a first diagram for comparing gains during beamforming between the antenna device according to the embodiment and the antenna device according to the first comparative example.
  • FIG. 7 is a second diagram for comparing gains during beamforming between the antenna device according to the embodiment and the antenna device according to the first comparative example.
  • FIG. 8 is a third diagram comparing gains during beamforming between the antenna apparatus according to the embodiment and the antenna apparatus according to the first comparative example.
  • FIG. 9 is a fourth diagram comparing gains during beamforming between the antenna apparatus according to the embodiment and the antenna apparatus according to the first comparative example.
  • FIG. 10 is a diagram showing an example of an antenna device according to a second comparative example.
  • FIG. 11 is a diagram comparing the gain in the front direction of the antenna device according to the embodiment and the antenna device according to the second comparative example.
  • 12A and 12B are diagrams illustrating antenna devices in which the thickness of the pillars is changed.
  • FIG. 13 is a diagram illustrating the gain of the antenna device with respect to the front direction when the width of the through hole is changed.
  • FIG. 14 is a diagram exemplifying a case where the interval between side walls is changed in the embodiment.
  • FIG. 15 is a first diagram comparing the gain of the antenna device according to the embodiment and the gain of the antenna device according to the first modified example.
  • FIG. 16 is a second diagram comparing the gain of the antenna device according to the embodiment and the gain of the antenna device according to the first modified example.
  • FIG. 17 plots the highest gain at each sidewall spacing.
  • FIG. 18 is a first diagram for comparing the gain of the antenna device according to the embodiment and the gain of the antenna device according to the first modified example.
  • FIG. 19 is a second diagram comparing the gain of the antenna device according to the embodiment and the gain of the antenna device according to the first modified example.
  • FIG. 20 plots the highest gain at each sidewall spacing.
  • FIG. 21 is a first diagram illustrating variations in the shape of through holes.
  • FIG. 22 is a second diagram illustrating variations in the shape of through holes.
  • FIG. 23 is a third diagram illustrating variations in the shape of through holes.
  • FIG. 24 is a fourth diagram illustrating variations in the shape of through holes.
  • FIG. 25 is a fifth diagram illustrating variations in the shape of through holes.
  • FIG. 26 is a diagram showing an example of arrangement of patch antennas in the embodiment.
  • FIG. 27 is a first diagram illustrating a state in which two millimeter wave antenna modules are vertically stacked.
  • FIG. 28 is a second diagram illustrating a state in which two millimeter wave antenna modules are vertically stacked.
  • 29 is a front view of the antenna device illustrated in FIG. 27.
  • FIG. 30 is a front view of the antenna device illustrated in FIG. 28.
  • FIG. FIG. 31 is a diagram showing the gain of the antenna device when the number of through-holes is changed.
  • FIG. 32 is a first diagram showing an example of using side walls and front walls as part of an antenna different from the patch antenna.
  • FIG. 33 is a second diagram showing an example of using the side walls and the front wall as part of an antenna different from the patch antenna.
  • FIG. 34 is a diagram illustrating an example of a wireless communication device implementing an antenna device.
  • FIG. 36 is a first diagram showing an example of using the front wall of the antenna device as part of the housing of the wireless communication device.
  • FIG. 35 is a second diagram showing an example of using the front wall of the antenna device as part of the housing of the wireless communication device.
  • FIG. 37 is a third diagram showing an example of using the front wall of the antenna device as part of the housing of the wireless communication device.
  • FIG. 38 is a fourth diagram showing an example of using the front wall of
  • An antenna device has, for example, the following configuration.
  • An antenna device includes an antenna module in which a plurality of patch antennas for emitting millimeter waves are arranged side by side on the same surface of a substrate, and metal antennas arranged at both ends in the direction in which the plurality of patch antennas are arranged. a pair of side walls made of metal, and a front wall made of metal provided in the direction in which the millimeter waves are emitted, and having a plurality of through holes corresponding to the plurality of patch antennas. The plurality of through holes are arranged at intervals wider than the plurality of patch antennas.
  • the front wall is formed with a plurality of through holes respectively corresponding to the plurality of patch antennas. Since the through-holes are arranged at intervals wider than those of the plurality of patch antennas, the positions of the through-holes and the patch antennas are displaced from each other when viewed from the front. Therefore, the millimeter waves emitted from the patch antenna are more likely to be reflected by the front wall than when the position of the through hole and the position of the patch antenna overlap when viewed from the front.
  • the millimeter waves reflected by the front wall are reflected by the side walls and the substrate and emitted from the front wall.
  • the millimeter wave that is reflected and emitted from the through hole is also emitted in a direction different from the front direction.
  • this antenna device In addition, in this antenna device, pillars are formed between the plurality of through holes on the front wall. Therefore, the rigidity of the present antenna device is increased compared to an antenna device in which such columns are not formed.
  • FIG. 1 is a diagram showing an example of an antenna device 1 according to an embodiment.
  • An antenna device 1 illustrated in FIG. 1 includes a millimeter wave antenna module 11, a ground substrate 12, side walls 13, 13, and a front wall .
  • the ground board 12 is a grounded board.
  • a millimeter wave antenna module 11 is provided on a ground substrate 12 .
  • FIG. 2 is a diagram showing the configuration of the millimeter wave antenna module 11. As shown in FIG.
  • the millimeter wave antenna module 11 is a module in which four patch antennas 111 are arranged in a row on the same surface of a substrate 112 that is rectangular in plan view.
  • a feeding point 113 is connected to each of the patch antennas 111 .
  • Each patch antenna 111 receives power from a feeding point 113 and emits millimeter waves.
  • the side walls 13 , 13 are a pair of metal walls arranged at both ends in the direction in which the patch antenna 111 is arranged on the substrate 112 .
  • the front wall 14 is a metal wall provided in the direction in which the patch antenna 111 emits millimeter waves.
  • the front wall 14 is formed with four through holes 141 corresponding to the patch antennas 111 respectively. Columns 142 are formed between the four through holes 141 .
  • the front wall 14 and side walls 13, 13 are made of copper, for example.
  • each size of the antenna device 1 is, for example, as follows.
  • a space W1 between the side walls 13, 13 is, for example, 25 mm.
  • the thickness T1 of the front wall 14 is, for example, 1 mm.
  • a height H1 of the front wall 14 is, for example, 6.2 mm.
  • a pitch (interval) W2 of the through holes 141 formed in the front wall 14 is, for example, 6.8 mm.
  • a depth D of the side wall 13 is, for example, 5 mm.
  • a width T2 of the side wall 13 is, for example, 1 mm. Also, referring to FIG.
  • each size of the millimeter wave antenna module 11 is, for example, as follows.
  • a width W3 of the substrate 112 is, for example, 23 mm.
  • a height H2 of the substrate 112 is, for example, 4.2 mm.
  • a pitch (interval) W4 of the patch antennas 111 is, for example, 5.7 mm.
  • the depth D substantially matches the distance from the millimeter wave antenna module 11 to the front wall 14. Since the radio waves emitted by the patch antenna 111 are millimeter waves (for example, a frequency of 27 GHz), the depth D is 0.5 times (0.5 wavelength) the wavelength of the millimeter waves emitted by the patch antenna 111. I can understand that.
  • FIG. 3 is a front view of the antenna device 1 according to the embodiment.
  • the portion of the patch antenna 111 located behind the pillar 142 is indicated by a dotted line.
  • the interval at which the through holes 141 are arranged is set longer than the interval at which the patch antennas 111 are arranged. Therefore, when viewed from the front, the position of the patch antenna 111 and the position of the through hole 141 are shifted from each other. Since the patch antenna 111 and the through hole 141 are arranged in this manner, at least a part of the patch antenna 111 is hidden by the column 142 when the antenna device 1 is viewed from the front.
  • FIG. 4 is an end view showing an end face taken along line AA in FIG.
  • millimeter waves emitted from the patch antenna 111 are schematically indicated by arrows.
  • the radio waves emitted from the plurality of patch antennas 111 in the through hole 141 are in phase, as illustrated by the circle R in FIG. is synthesized by Therefore, in the antenna device 1, the gain is improved as compared with the case where the millimeter wave is emitted from each of the patch antennas 111 without providing the front wall 14 and the through hole 141.
  • FIG. 4 is an end view showing an end face taken along line AA in FIG.
  • millimeter waves emitted from the patch antenna 111 are schematically indicated by arrows.
  • the radio waves emitted from the plurality of patch antennas 111 in the through hole 141 are in phase, as illustrated by the circle R in FIG. is synthesized by Therefore, in the antenna device 1, the gain is improved as compared with the case where the millimeter wave is emitted from each of the patch antenna
  • FIG. 5 is a diagram showing an example of an antenna device 500 according to a first comparative example.
  • the antenna device 500 differs from the antenna device 1 according to the embodiment in that a front wall 514 is provided instead of the front wall 14 .
  • the front wall 514 is formed in a frame shape when the antenna device 500 is viewed from the front. All the millimeter wave antenna modules 11 are arranged so as to fit within the frame of the front wall 514 when the antenna device 500 is viewed from the front. That is, the front wall 514 is different from the front wall 14 of the antenna device 1 in that the pillar 142 is not provided.
  • FIG. 6 to 9 are diagrams comparing gains during beamforming between the antenna device 1 according to the embodiment and the antenna device 500 according to the first comparative example. 6 to 9, the gain of antenna device 1 is indicated by a solid line, and the gain of antenna device 500 is indicated by a dotted line.
  • FIG. 6 illustrates the gain when beamforming is performed with the phase difference with the adjacent patch antenna set to 0 degree.
  • FIG. 7 exemplifies the gain when beamforming is performed with a setting of a phase difference of 30 degrees with respect to the adjacent patch antenna.
  • FIG. 8 exemplifies the gain when beamforming is performed with the phase difference from the adjacent patch antenna set to 60 degrees.
  • FIG. 9 illustrates the gain when beamforming is performed with the phase difference from the adjacent patch antenna set to 90 degrees.
  • the gain of the antenna device 1 according to the embodiment is more improved than that of the antenna device 500 according to the first comparative example regardless of which direction beamforming is performed. I can understand that. That is, the antenna device 1 according to the embodiment can suppress deterioration of antenna performance in beamforming. Further, it is considered that the antenna device 1 having the pillars 142 has higher rigidity than the antenna device 500 not having the pillars 142 .
  • FIG. 10 is a diagram showing an example of an antenna device 600 according to a second comparative example.
  • the antenna device 600 differs from the antenna device 500 according to the first comparative example in that the side wall 13 is not provided.
  • FIG. 11 is a diagram comparing the gain in the front direction between the antenna device 1 according to the embodiment and the antenna device 600 according to the second comparative example.
  • the antenna device 1 having the side walls 13 has improved gain in the front direction as compared with the antenna device 600 not having the side walls 13 .
  • the radio wave emitted from the patch antenna 111 can be reflected by the side wall 13 and emitted from the through hole 141, so it is considered that such an improvement in gain can be seen.
  • the antenna device 1 including the pillars 142 and the side walls 13 has higher rigidity than the antenna device 600 which does not include the pillars 142 and the side walls 13 .
  • the antenna device 1 including the side walls 13, the plurality of through holes 141, and the pillars 142 has improved communication performance and housing rigidity compared to the antenna device 500 and the antenna device 600.
  • FIG. 12 is a diagram illustrating an antenna device 1 in which the thickness of the pillar 142 is changed.
  • the width W5 of the through hole 141 is set to 3.45 mm (total width of the four through holes 141 is 13.8 mm).
  • the width W5 of the through hole 141 is set to 2.3 mm (total width of the four through holes 141 is 9.2 mm).
  • the width W5 of the through hole 141 is set to 1.15 mm (the total width of the four through holes 141 is 4.6 mm).
  • the thickness of the column 142 of the antenna device 1 can be changed variously as illustrated in FIG.
  • the widths of the through holes 141 and the pillars 142 can be determined as follows.
  • a ratio of the interval W1 (see FIG. 1) between the side walls 13, 13 to be allocated to the pillar 142 is determined.
  • the width of the pillars 142 is calculated by dividing the number obtained by multiplying the interval W1 by 0.8 by the number of the pillars 142 (“3” in the example of FIG. 12). can do.
  • the width of the through-hole 141 is calculated by dividing the number obtained by multiplying the interval W1 by (1-0.8) by the number of through-holes 141 ("4" in the example of FIG. 12). can do.
  • FIG. 13 is a diagram illustrating the gain of the antenna device 1 with respect to the front direction when the width of the through hole 141 is changed.
  • the vertical axis indicates the gain
  • the horizontal axis indicates the total width of the through holes 141 .
  • the dotted line B indicates the gain of the antenna device 600 according to the second comparative example.
  • FIG. 13 also shows a case where the center of the through-hole 141 and the center of the patch antenna 111 in a front view are aligned (indicated by “ ⁇ (circle)” in FIG. 13 ), and the center of the through-hole 141 in a front view.
  • the gain in the front direction of the antenna device 1 can be improved. is understandable. Further, it can be understood that the gain in the front direction can be improved more than that of the antenna device 600 by setting the total width of the through holes 141 to 5 mm or more. In other words, it can be understood that the gain in the front direction can be improved more than the antenna device 600 by setting the total width of the through-holes 141 to 0.5 wavelength or more of the millimeter-wave radio wave.
  • FIG. 14 is a diagram illustrating a case where the interval between the side walls 13, 13 is changed in the embodiment.
  • FIG. 14 is a diagram of the antenna device 1 viewed from above.
  • the interval W1 between the side walls 13 is extended in the order of (A) ⁇ (B) ⁇ (C) of FIG. 14 .
  • the width of the front wall 14 and the ground substrate 12 is also extended along with the extension of the interval W1.
  • the width of the millimeter wave antenna module 11 is constant in (A) ⁇ (B) ⁇ (C) of FIG. 14 . That is, the pitch of patch antenna 111 is not changed.
  • FIG. 15 and 16 are diagrams comparing the gain of the antenna device 1 according to the embodiment and the gain of the antenna device 500 according to the first modified example.
  • FIG. 15 illustrates widths of the pillars 142 that provide higher gain than the antenna device 500 when the spacing W1 between the side walls 13 of the antenna device 1 and the antenna device 500 is changed.
  • the width of the through-hole 141 is constant even if the interval W1 is changed.
  • FIG. 16 illustrates widths of the columns 142 that provide higher gain than the antenna device 500 with the spacing W1 fixed at 23 mm when the spacing W1 between the side walls 13 of the antenna device 1 is changed.
  • FIG. 17 is a diagram plotting the highest gain at each interval W1 of the side walls 13.
  • the vertical axis in FIG. 17 indicates the gain (dBi) in the front direction, and the horizontal axis indicates the interval W1 (mm).
  • the gain of the antenna device 1 often exceeds the gain of the antenna device 500 when the width of the column 142 is in the range of 1 mm to 8 mm.
  • the width of the column 142 of 1 mm to 8 mm corresponds to 0.1 wavelength to 0.7 wavelength in the case of millimeter waves with a frequency of 27 GHz. Therefore, when the patch antenna 111 emits millimeter waves with a frequency of 27 GHz, the width of each of the three pillars 142 formed between the four through holes 141 is set to 0.1 to 0.7 wavelengths. is preferred. In other words, the interval between the through holes 141 is preferably 0.1 to 0.7 wavelengths. Further, referring to FIG.
  • the interval W1 between the side walls 13 is preferably about 23 mm to 33 mm, or about 40 mm to 44 mm.
  • the distance W1 between the side walls 13 of 1 mm to 8 mm is preferably set to 2 to 2.9 wavelengths or 3.6 to 3.9 wavelengths in the case of millimeter waves with a frequency of 27 GHz.
  • FIG. 18 and 19 are diagrams comparing the gain of the antenna device 1 according to the embodiment and the gain of the antenna device 500 according to the first modified example.
  • FIG. 18 illustrates widths of the pillars 142 that provide higher gain than the antenna device 500 when the spacing W1 between the side walls 13 of the antenna device 1 and the antenna device 500 is changed.
  • the width of the through-hole 141 is also changed according to the change in the interval W1. That is, in the example of FIG. 18, the width of the through hole 141 is increased as the interval W1 is increased.
  • FIG. 19 exemplifies the width of the column 142 that provides higher gain than the antenna device 500 with the spacing W1 fixed at 23 mm when the spacing W1 between the side walls 13 of the antenna device 1 is changed.
  • FIG. 20 is a diagram plotting the highest gain at each interval W1 of the side walls 13.
  • the vertical axis in FIG. 20 indicates the gain (dBi) in the front direction, and the horizontal axis indicates the interval W1 (mm).
  • the gain of the antenna device 1 often exceeds the gain of the antenna device 500 when the width of the column 142 is in the range of 1 mm to 13 mm.
  • the 1 mm to 13 mm width of the column 142 corresponds to 0.1 to 1.2 wavelengths in the case of millimeter waves with a frequency of 27 GHz. Therefore, when the patch antenna 111 emits a millimeter wave with a frequency of 27 GHz, the width of each of the three pillars 142 formed between the four through holes 141 is set to 0.1 to 1.2 wavelengths. is preferred. In other words, the interval between the through holes 141 is preferably 0.1 to 1.2 wavelengths. Also, referring to FIG. 20, the interval W1 between the side walls 13 is preferably about 23 mm to 45 mm. In the case of millimeter waves with a frequency of 27 GHz, the distance W1 between the side walls 13 is preferably set to 2 to 4 wavelengths.
  • the patch antenna 111 and the through hole 141 are provided so as to be displaced from each other when the antenna device 1 is viewed from the front. That is, when the antenna device 1 is viewed from the front, at least part of the patch antenna 111 is hidden by the pillar 142 . Therefore, the millimeter waves emitted from the patch antenna 111 are less likely to be reflected by the front wall 14 than in the case where the entire patch antenna 111 is visible through the through hole 141 when viewed from the front. get higher The millimeter waves reflected by the front wall 14 are reflected by the side walls 13 and 13 and the ground substrate 12 and emitted from the patch antenna 111 .
  • the millimeter wave that is reflected and emitted from the through hole 141 is also emitted in a direction different from the front direction.
  • the distance from the millimeter wave antenna module 11 to the front wall 14 is set to 0.5 times the wavelength of the millimeter wave emitted by the patch antenna 111.
  • the millimeter wave directly passing through the through hole 141 from the patch antenna 111 is emitted from the patch antenna 111 and reflected by the front wall 14 , the side wall 13 , and the ground substrate 12 to be reflected by the patch antenna 111 .
  • the rigidity of the antenna device 1 can be increased compared to the antenna device 500 in which the pillars 142 are not provided. Furthermore, since the side walls 13, 13 are provided in the antenna device 1, the rigidity of the antenna device 1 can be increased compared to the antenna device 600 in which the side walls 13, 13 are not provided.
  • the shape of the through hole 141 is formed in a rectangular shape when viewed from the front.
  • the shape of through-hole 141 is not limited to a rectangular shape, and may be formed in various shapes.
  • 21 to 25 are diagrams illustrating variations of the shape of the through-hole 141.
  • FIG. FIG. 21 illustrates through holes 141 that are cross-shaped when viewed from the front.
  • FIG. 22 illustrates through holes 141 that are square in front view.
  • FIG. 23 illustrates through holes 141 that are crossed out (tilted cross-shaped) when viewed from the front.
  • FIG. 24 illustrates through holes 141 that are diamond-shaped in front view.
  • FIG. 25 illustrates through holes 141 that are circular in front view.
  • the antenna device 1 can be adapted to orthogonal polarized waves.
  • the through-hole 141 can adopt various shapes.
  • the through holes 141 having different shapes may be mixed.
  • the antenna device 1 may include a cross-shaped through-hole 141 illustrated in FIG. 21 and a diamond-shaped through-hole 141 illustrated in FIG.
  • the patch antenna 111 has a square arrangement when viewed from the front (upper and lower sides are parallel to the upper and lower sides of the millimeter wave antenna module 11, and left and right sides are the left and right sides of the millimeter wave antenna module 11). parallel to the side of the square), and may be arranged at an angle.
  • FIG. 26 is a diagram showing an example of arrangement of patch antennas 111 in the embodiment. In FIG. 26, the front wall 14 is removed to show the arrangement of the patch antenna 111. As shown in FIG. As exemplified in FIG. 26, each of the patch antennas 111 may be arranged in a rhombus (a state tilted 45 degrees from the state shown in FIG. 2) when viewed from the front.
  • the millimeter wave antenna modules 11 may be arranged in two tiers vertically.
  • the through holes 141 may be arranged for each of the patch antennas 111 of the millimeter wave antenna modules 11 stacked in two stages.
  • 27 and 28 are diagrams illustrating a state in which the millimeter wave antenna modules 11 are vertically stacked in two stages.
  • upper and lower walls 15 are also provided above and below the antenna device 1 .
  • FIG. 29 is a diagram showing a state in which the antenna device 1 illustrated in FIG. 27 is viewed from the front.
  • FIG. 30 is a front view of the antenna device 1 illustrated in FIG. 28 .
  • the portion hidden behind the front wall 14 in the front view is indicated by dotted lines.
  • the patch antenna 111 and the through hole 141 are positioned such that the vertical center of the patch antenna 111 substantially coincides with the vertical center of the through hole 141 when the antenna device 1 is viewed from the front.
  • a relationship may be established.
  • a positional relationship may be set in which the distance between the through holes 141 in the lateral direction is increased when the antenna device 1 is viewed from the front.
  • FIG. 31 is a diagram showing the gain of the antenna device 1 when the number of through-holes 141 is varied.
  • the vertical axis of FIG. 31 indicates the gain (dBi) of the antenna device 1
  • the horizontal axis indicates the total width (mm) of the through-holes 141 provided in the front wall 14. As shown in FIG. In FIG.
  • graph A shows the case where the number of through-holes 141 is two
  • graph B shows the case where the number of through-holes 141 is three
  • graph C shows the case where the number of through-holes 141 is four
  • D shows the case where the number of through-holes 141 is eight
  • graph E shows the case where the number of through-holes 141 is sixteen.
  • a horizontal dotted line F illustrates the gain of the antenna device 500 .
  • a gain higher than that of the antenna device 500 can be achieved by appropriately adjusting the total width of the through holes 141 .
  • the gain of the antenna device 1 can be made higher than that of the antenna device 500 by setting the total width of the through-holes 141 to 5 mm or more. That is, when the patch antenna 111 emits millimeter waves of 27 GHz, the gain of the antenna device 1 can be made higher than that of the antenna device 500 if the total width of the through holes 141 is 0.45 wavelength or more. .
  • the side wall 13 and the front wall 14 may be used as part of an antenna other than the patch antenna 111.
  • a configuration in which the side wall 13 and the front wall 14 of the antenna device 1 according to the embodiment are used as part of the antenna will be described below.
  • one side wall 13 is replaced with a side wall 13a.
  • the side wall 13 a is in contact with the front wall 14 , but a gap is formed between the side wall 13 a and the ground substrate 12 .
  • a feeding point 21 is arranged in a gap formed between the side wall 13a and the ground substrate 12, and power is supplied to the side wall 13a.
  • both side walls 13 are replaced with side walls 13a.
  • a feeding point 21 is arranged between one side wall 13a and the ground substrate 12, and power is supplied to the one side wall 13a.
  • an inverted L antenna can be formed by the side wall 13a, the front wall 14, and the side wall 13a.
  • FIG. 34 is a diagram showing an example of a wireless communication device 800 in which the antenna device 1 is mounted.
  • a wireless communication device 800 includes a housing 801 that is substantially rectangular in plan view.
  • One antenna device 1 is provided on each side of a housing 801 that is rectangular in plan view.
  • the front wall 14 of the antenna device 1 forms part of the housing 801 (part of the side wall).
  • FIG. 35 to 38 illustrate an example in which the front wall 14 is used as part of the housing 801 of the wireless communication device 800.
  • FIG. in the example of FIG. 36 a feeding point 21 is provided on the substrate 11 between one of the side walls 13 and 13 and the substrate 11 .
  • An additional conductor 22 is provided which receives power from the feeding point 21 and is connected to the front wall 14 . Even with such a configuration, the side walls 13, 13, the front wall 14 and the additional conductor 22 can form a ladder loop antenna.
  • an extended portion 14a is formed by extending the front wall 14 from one of the side walls 13,13. No through hole 141 is provided in the extended portion 14a. An additional conductor 22 connected to the extension 14a and the feed point 21 is then provided. In addition, in FIG. 35, a dotted line is drawn on the boundary between the front wall 14 and the extended portion 14a to facilitate understanding. According to such a configuration, the side walls 13, 13, the front wall 14 and the additional conductor 22 form a ladder loop antenna. The length of the extension portion 14a may be appropriately determined according to the frequency of the radio waves that operate the ladder loop antenna.
  • one side wall 13 in the configuration illustrated in FIG. 37 By forming the gap 12a, an inverted F antenna is formed by the additional conductor 22, the extension portion 14a, the front wall 14 and the side walls 13a.
  • the front wall 14 is used as part of the housing 801 of the wireless communication device, and the extended portion 14a is also formed.
  • the side walls 13, 13 are then replaced with side walls 13a, 13a.
  • An additional conductor 22 a connected to the extension portion 14 a and the ground substrate 12 is provided between the extension portion 14 a and the ground substrate 12 .
  • a feeding point 21 is provided between one side wall 13a of the side walls 13a and the ground substrate 12, and power is supplied from the feeding point 21 to the one side wall 13a.
  • an inverted F antenna can be formed by the additional conductor 22a, the extension portion 14a, the side walls 13a, the front wall 14 and the side walls 13a.
  • the antenna device 1 not only the patch antenna 111 but also the front wall 14 and the side walls 13, 13 can be operated as antennas.

Landscapes

  • Waveguide Aerials (AREA)

Abstract

L'invention concerne un dispositif d'antenne et un dispositif de communication sans fil avec lesquels il est possible de supprimer la dégradation des propriétés d'antenne dans la formation de faisceau. Ce dispositif d'antenne comprend : un module d'antenne dans lequel une pluralité d'antennes à plaque pour émettre des ondes millimétriques sont disposées sur une surface identique d'un substrat ; une paire de parois latérales métalliques qui sont disposées au niveau des deux extrémités dans la direction dans laquelle la pluralité d'antennes à plaque sont agencées ; et une paroi avant métallique qui est disposée dans la direction d'émission des ondes millimétriques et qui a formé à l'intérieur de celle-ci une pluralité de trous traversants correspondant à la pluralité d'antennes à plaque. La pluralité de trous traversants sont disposés à un intervalle plus large par comparaison avec la pluralité d'antennes à plaque.
PCT/JP2021/011069 2021-03-18 2021-03-18 Dispositif d'antenne et dispositif de communication sans fil WO2022195801A1 (fr)

Priority Applications (2)

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JP2023506623A JPWO2022195801A1 (fr) 2021-03-18 2021-03-18
PCT/JP2021/011069 WO2022195801A1 (fr) 2021-03-18 2021-03-18 Dispositif d'antenne et dispositif de communication sans fil

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Application Number Priority Date Filing Date Title
PCT/JP2021/011069 WO2022195801A1 (fr) 2021-03-18 2021-03-18 Dispositif d'antenne et dispositif de communication sans fil

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0497604A (ja) * 1990-08-15 1992-03-30 Hitachi Chem Co Ltd スロット板を有するパッチアンテナ
WO2005055366A1 (fr) * 2003-11-14 2005-06-16 Hitachi, Ltd. Radar monte sur un vehicule
JP2013219723A (ja) * 2012-04-12 2013-10-24 Hitachi Cable Ltd アンテナ装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0497604A (ja) * 1990-08-15 1992-03-30 Hitachi Chem Co Ltd スロット板を有するパッチアンテナ
WO2005055366A1 (fr) * 2003-11-14 2005-06-16 Hitachi, Ltd. Radar monte sur un vehicule
JP2013219723A (ja) * 2012-04-12 2013-10-24 Hitachi Cable Ltd アンテナ装置

Also Published As

Publication number Publication date
JPWO2022195801A1 (fr) 2022-09-22

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