WO2023053941A1 - Appareil d'antenne et appareil de communication - Google Patents

Appareil d'antenne et appareil de communication Download PDF

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Publication number
WO2023053941A1
WO2023053941A1 PCT/JP2022/034203 JP2022034203W WO2023053941A1 WO 2023053941 A1 WO2023053941 A1 WO 2023053941A1 JP 2022034203 W JP2022034203 W JP 2022034203W WO 2023053941 A1 WO2023053941 A1 WO 2023053941A1
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WIPO (PCT)
Prior art keywords
substrate
antenna element
antenna
antenna device
dielectric member
Prior art date
Application number
PCT/JP2022/034203
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English (en)
Japanese (ja)
Inventor
崇弥 根本
英樹 上田
Original Assignee
株式会社村田製作所
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Publication date
Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Priority to JP2023551281A priority Critical patent/JPWO2023053941A1/ja
Publication of WO2023053941A1 publication Critical patent/WO2023053941A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/40—Radiating elements coated with or embedded in protective material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/29—Combinations of different interacting antenna units for giving a desired directional characteristic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them

Definitions

  • the present invention relates to an antenna device and a communication device.
  • An antenna device having antenna elements oriented in three different directions is known (Patent Document 1).
  • This antenna device includes two rigid substrates and a flexible substrate connecting the two. By curving the flexible substrate, the directions in which the surfaces of the two rigid substrates face are made different.
  • An antenna element is arranged on each of the two rigid substrates, and an antenna element is also arranged on the curved surface of the flexible substrate. This configuration realizes an antenna device in which three antenna elements face three different directions.
  • An object of the present invention is to provide an antenna device including antenna elements facing at least two different directions and capable of widening the band.
  • a first substrate a second substrate connected to the first substrate; a first antenna element disposed on the first substrate and radiating radio waves in a first direction; a second antenna element disposed on the second substrate and radiating radio waves in a direction different from the first direction; and a dielectric member arranged on a surface of the second substrate in a region including at least a region where the second antenna element is arranged.
  • the antenna device comprising a high-frequency integrated circuit that supplies high-frequency signals to the first antenna element and the second antenna element of the antenna device.
  • FIG. 1A and 1B are a perspective view and a cross-sectional view, respectively, of an antenna device according to a first embodiment.
  • FIG. 2 is a cross-sectional view of the antenna device according to the second embodiment.
  • FIG. 3 is a cross-sectional view of the antenna device according to the third embodiment.
  • FIG. 4 is a cross-sectional view of an antenna device according to a fourth embodiment.
  • FIG. 5 is a sectional view of an antenna device according to a modification of the fourth embodiment.
  • 6A and 6B are a perspective view and a cross-sectional view, respectively, of an antenna device according to a fifth embodiment.
  • FIG. 7A is a cross-sectional view of an antenna device according to a sixth embodiment, and FIGS. 7B and 7C are cross-sectional views of antenna devices according to modifications of the sixth embodiment.
  • FIG. 8 is a sectional view of the antenna device according to the seventh embodiment.
  • FIG. 9 is a block diagram of a communication device according to an eighth
  • FIGS. 1A and 1B are a perspective view and a cross-sectional view, respectively, of an antenna device according to a first embodiment.
  • a curved second substrate 21 is connected to the flat first substrate 11 .
  • a flat third substrate 31 is connected to the second substrate 21 at a position away from the first substrate 11 in the bending direction D2 of the second substrate 21 .
  • a structure in which "substrates are connected” includes both a structure in which separate substrates are connected and a structure in which one substrate formed from the same material is continuously formed. include.
  • the first substrate 11 , the second substrate 21 , and the third substrate 31 are made of the same continuous material, and the thickness of the second substrate 21 is thinner than the thicknesses of the first substrate 11 and the third substrate 31 .
  • the "thickness of the substrate” means the dimension of a substrate having a two-dimensionally extending surface in a direction perpendicular to the two-dimensionally extending surface. Note that the "surface having a two-dimensional spread" does not have to be a flat surface, and may be a curved surface.
  • the thicknesses of the first substrate 11 and the third substrate 31 are substantially the same.
  • the substrate shown in FIG. 1A is manufactured by thinning a region of one dielectric substrate corresponding to the second substrate 21 and bending the thinned second substrate 21 . Laser processing, router processing, or the like, for example, can be used to thin the substrate.
  • the surfaces facing the space on the same side as the surface on the outer peripheral side of the curved portion of the second substrate 21 are referred to as the first surface 13 and the third surface 33, respectively.
  • a surface on the outer peripheral side of the curved portion of the second substrate 21 is referred to as a second surface 23 .
  • the direction parallel to the line of intersection 48 between the virtual plane containing the first surface 13 and the virtual plane containing the third surface 33 is called the direction of intersection D1.
  • a step is formed at the boundary between the first surface 13 and the second surface 23 and the boundary between the second surface 23 and the third surface 33 so that the second surface 23 is relatively low.
  • the opposite surfaces of the first substrate 11, the second substrate 21, and the third substrate 31 are smoothly connected.
  • a step formed at the boundary between the first surface 13 and the second surface 23 can be considered as the end surface 15 of the first substrate 11 .
  • the step formed at the boundary between the second surface 23 and the third surface 33 can be considered as the end surface 35 of the third substrate 31 .
  • the end surface 15 of the first substrate 11 and the end surface 35 of the third substrate 31 extend in a direction parallel to the intersection line direction D1.
  • the first substrate 11 is connected to the second substrate 21 over the entire range of the end face 15 in the direction of intersection D1.
  • the third substrate 31 is connected to the second substrate 21 over the entire range of the end face 35 in the direction of intersection D1.
  • a plurality of first antenna elements 12 and a plurality of third antenna elements 32 are arranged on the first substrate 11 and the third substrate 31, respectively.
  • the first antenna element 12 and the third antenna element 32 radiate radio waves into the space on the same side as the second surface 23 of the second substrate 21 .
  • the plurality of first antenna elements 12 are arranged, for example, in a matrix with the direction parallel to the direction of intersection D1 as the row direction.
  • the plurality of third antenna elements 32 are arranged in a row parallel to the intersection line direction D1, for example. Patch antennas, for example, are used as the first antenna element 12 and the third antenna element 32 .
  • a plurality of second antenna elements 22 are arranged on the second substrate 21 .
  • the plurality of second antenna elements 22 are arranged in a line parallel to the intersection line direction D1.
  • the second antenna element 22 radiates radio waves to the space on the second surface 23 side.
  • a dipole antenna for example, is used as the second antenna element 22 .
  • the dipole antenna is arranged, for example, in a long posture in the direction of intersection D1.
  • a dielectric member 40 is arranged on the second surface 23 of the second substrate 21 , and the dielectric member 40 is in close contact with the second surface 23 of the second substrate 21 .
  • the dielectric member 40 also adheres to the end surfaces 15 and 35 of the first substrate 11 and the third substrate 31 connected to the second surface 23 .
  • the surface of the dielectric member 40 opposite to the surface in close contact with the second surface 23 is a curved surface that is curved according to the curved shape of the second surface 23 .
  • the dielectric member 40 can be formed, for example, by applying a resin precursor to the second surface 23 of the second substrate 21 and then curing the resin precursor. Alternatively, the dielectric member 40 may be molded in advance, and the dielectric member 40 may be adhered to the second surface 23 with an adhesive.
  • a radio frequency integrated circuit (RFIC) 60 is mounted on the surface of the first substrate 11 opposite to the first surface 13 .
  • the high-frequency integrated circuit 60 is provided in the first substrate 11 and supplies a high-frequency signal to the first antenna element 12 through the feeder line 14 capable of feeding the first antenna element 12 .
  • the high-frequency integrated circuit 60 is connected via the feeder line 14 provided on the first substrate 11 and the feeder line 24 provided on the second substrate 21 , that is, the feeder lines 14 and 24 capable of feeding the second antenna element 22 . to supply a high frequency signal to the second antenna element 22 .
  • the high-frequency integrated circuit 60 includes the feed line 14 provided on the first substrate 11, the feed line 24 provided on the second substrate 21, and the feed line 34 provided on the third substrate 31, that is, the third antenna.
  • a high frequency signal is supplied to the third antenna element 32 via feed lines 14 , 24 that can feed the element 32 .
  • a ground plane 16 and the like are arranged on the first substrate 11 and the third substrate 31 in addition to the feeder lines 14 , 24 and 34 .
  • the ground plane 16 is arranged at a position deeper than the first antenna element 12 and the third antenna element 32 with respect to the first surface 13 and the third surface 33, respectively.
  • the antenna device coverage can be expanded.
  • the dielectric member 40 for example, a sealing resin, an adhesive material, a substrate material, a housing material, a tape material, a resist material, or the like can be used.
  • sealing resins include epoxy resins and phenolic resins.
  • adhesive materials include acrylic resins, silicone resins, and polyimide resins.
  • substrate materials include ceramic, liquid crystal polymer, glass epoxy, polytetrafluoroethylene (PTFE), and polyimide resin.
  • materials for the housing include ABS resin, glass, acrylic resin, and the like.
  • tape materials include polyethylene terephthalate (PET) resin and the like.
  • resist materials include epoxy resin and the like.
  • the mechanical strength of the second substrate 21 is increased by adhering the dielectric member 40 to the thinned second surface 23 of the second substrate 21 .
  • the curved shape of the second substrate 21 is fixed, and an excellent effect of facilitating the attachment work to the housing can be obtained.
  • the substrate consisting of the first substrate 11, the second substrate 21, and the third substrate 31 is manufactured from one substrate, the number of parts can be reduced compared to the method of preparing these substrates separately. can.
  • the adhesion of the dielectric member 40 to the second substrate 21 may be performed after the second substrate 21 is bent, or may be performed before the bending.
  • a liquid or semi-cured resin material is placed on the surface of the curved second substrate 21 on the outer peripheral side, and then the resin material is applied. Allow the material to harden.
  • the second substrate 21 is placed on the surface of the planar second substrate 21 with a liquid or semi-cured resin material. It is preferable to bend 21 and then cure the resin material.
  • first antenna elements 12 a plurality of first antenna elements 12, second antenna elements 22, and third antenna elements 32 are arranged. Any or all of the antenna elements 32 may be one.
  • patch antennas are used as the first antenna element 12 and the third antenna element 32, and dipole antennas are used as the second antenna element 22, but other antennas may be used.
  • linear antennas such as dipole antennas may be used as the first antenna element 12 and the third antenna element 32 .
  • a patch antenna may be used as the second antenna element 22 .
  • the second substrate 21 is curved substantially at a right angle, but the angle to be curved is not limited to a right angle.
  • the bending angle may be determined according to the shape of the housing that accommodates the antenna device, the characteristics required of the antenna device, and the like.
  • the dielectric member 40 is arranged so as to cover the entire second surface 23 of the second substrate 21, but in order to widen the band of the second antenna element 22, the second surface It is not necessary to dispose the dielectric member 40 over the entire area of 23 .
  • the dielectric member 40 may be arranged in a region of the second surface 23 of the second substrate 21 that includes at least the region where the second antenna element 22 is arranged.
  • the second substrate 21 has a curved shape in the first embodiment, it may have another shape.
  • the first antenna element 12 arranged on the first substrate 11 radiates radio waves in the first direction
  • the second antenna element 22 arranged on the second substrate 21 radiates radio waves in a direction different from the first direction. should be radiated.
  • the first direction in which the first antenna element 12 emits radio waves means the direction in which the main beam of the first antenna element 12 faces.
  • the second antenna element 22 radiates radio waves in a direction different from the first direction means that the direction in which the main beam of the second antenna element 22 points is different from the first direction.
  • the direction in which the main beam faces means not the direction in which the main beam faces when a plurality of antenna elements operate as an array antenna, but the direction in which the main beam faces when an antenna element operates alone.
  • the coverage range of the first antenna element 12 includes the normal direction of the first substrate 11 .
  • the coverage range of the second antenna element 22 includes the normal direction of the second substrate 21 at the location where the second antenna element 22 is arranged. Part of the coverage range of the first antenna element 12 and part of the coverage range of the second antenna element 22 may overlap each other, but in the above sense, the second antenna element 22 It can be said that the antenna element 12 radiates radio waves in a direction different from the first direction in which it radiates radio waves.
  • FIG. 2 is a cross-sectional view of the antenna device according to the second embodiment.
  • the dielectric member 40 is arranged on the second surface 23 of the second substrate 21, and the first surface 13 and the third No dielectric member 40 is disposed on the third surface 33 of the substrate 31 .
  • the dielectric member 40 is arranged to extend over the first surface 13 of the first substrate 11 and the third surface 33 of the third substrate 31 .
  • the dielectric member 40 can be formed, for example, by applying a resin precursor to the first surface 13, the second surface 23, and the third surface 33 and then curing the resin precursor. Alternatively, the dielectric member 40 may be molded in advance, and the dielectric member 40 may be adhered to the first surface 13, the second surface 23, and the third surface 33 with an adhesive. Alternatively, placing the dielectric member 40 only on the second surface 23 as shown in FIG. may be placed on top of each other.
  • the coverage of the antenna device can be expanded.
  • the dielectric member 40 is arranged on the first antenna element 12 and the third antenna element 32, not only the second antenna element 22 but also the first antenna element 12 and It is possible to widen the band of the third antenna element 32 .
  • the mechanical strength of the entire antenna device can be enhanced. It is also possible to use an adhesive as the dielectric member 40 and to bond the antenna device to the inner surface of the housing with this adhesive.
  • FIG. 3 is a cross-sectional view of the antenna device according to the third embodiment.
  • steps are formed at the boundary between the first surface 13 and the second surface 23 and at the boundary between the second surface 23 and the third surface 33 .
  • the first surface 13, the second surface 23 and the third surface 33 are smoothly connected. Instead, steps are formed on the opposite surfaces of the first substrate 11 , the second substrate 21 and the third substrate 31 .
  • the dielectric member 40 is arranged on the first surface 13, the second surface 23 and the third surface 33 as in the second embodiment.
  • the excellent effects of the third embodiment will be described.
  • the third embodiment as in the second embodiment, it is possible to expand the coverage of the antenna device, broaden the band of the antenna device, and improve the mechanical strength. Furthermore, in the third embodiment, since the underlying surface of the dielectric member 40 is smooth, an excellent effect is obtained in that the dielectric member 40 can be easily molded.
  • the dielectric member 40 is arranged on the first surface 13, the second surface 23, and the third surface 33, but the surface of the second substrate 21 opposite to the second surface 23 Other dielectric members may also be placed on the .
  • This configuration provides an excellent effect of further increasing the mechanical strength.
  • the dielectric member 40 is not placed on the first surface 13, the second surface 23, and the third surface 33, and the dielectric member is placed only on the surface of the second substrate 21 opposite to the second surface 23. may be adhered. Also in this case, the excellent effect of increasing the mechanical strength can be obtained.
  • FIG. 4 is a cross-sectional view of the antenna device according to the fourth embodiment.
  • the first substrate 11, the second substrate 21, and the third substrate 31 are made of the same continuous material.
  • flat rigid substrates are used for the first substrate 11 and the third substrate 31, and a flexible substrate is used for the second substrate 21.
  • rigid substrates include glass epoxy substrates, low temperature co-fired ceramics (LTCC) substrates, liquid crystal polymer substrates, and the like.
  • Examples of flexible substrates include polyimide substrates, PET substrates, and liquid crystal polymer substrates.
  • the liquid crystal polymer substrate can be used as a rigid substrate or a flexible substrate depending on its thickness.
  • a second substrate 21 is connected to the surface of the first substrate 11 opposite to the first surface 13 via a connecting member 46 such as a connector or solder.
  • the second substrate 21 is connected to the opposite side of the substrate 21 via a connection member 46 such as solder.
  • the feeder line 14 in the first board 11 and the feeder line 24 in the second board 21 are electrically connected via the connecting member 46, and the feeder line 24 in the second board 21 and the feeder line 24 in the third board 31 are electrically connected. It is electrically connected to the power supply line 34 via a connecting member 46 .
  • a dielectric member 40 is arranged on the second surface 23 which is the surface on the outer peripheral side of the curved portion of the second substrate 21 .
  • the dielectric member 40 is in close contact with the second surface 23 of the second substrate 21 and the end surfaces 15 and 35 of the first substrate 11 and the third substrate 31 .
  • the fourth embodiment as in the first embodiment, it is possible to expand the coverage of the antenna device, broaden the band of the second antenna element 22, and improve the mechanical strength.
  • FIG. 5 is a sectional view of an antenna device according to a modification of the fourth embodiment.
  • the dielectric member 40 is in close contact with the entire second surface 23 of the second substrate 21 .
  • the dielectric member 40 is in close contact with only a partial area of the second surface 23 . More specifically, dielectric member 40 is arranged on the area of second surface 23 that includes second antenna element 22 . A gap is secured between the dielectric member 40 and the first substrate 11 and between the dielectric member 40 and the third substrate 31 .
  • Such a structure can be produced, for example, by bonding the dielectric member 40 molded into a predetermined shape to the second substrate 21 with an adhesive member such as an adhesive or double-sided tape.
  • connection member 46 solder is used as the connection member 46 .
  • a connector may be used as the connection member 46 .
  • 6A and 6B are a perspective view and a cross-sectional view, respectively, of the antenna device according to the fifth embodiment.
  • the plane parallel to the line of intersection 48 between the virtual plane including the first surface 13 of the first substrate 11 and the virtual plane including the third surface 33 of the third substrate 31 is referred to as an intersection direction D1.
  • the first substrate 11 and the third substrate 31 are connected to the second substrate 21 over the entire range in the direction of intersection D1.
  • the third substrate 31 is connected to the second substrate 21 at the end face 35 only in a partial range in the direction of intersection D1.
  • the end surfaces 35 connected to the second substrate 21 are arranged at a plurality of locations at intervals in the intersection line direction D1.
  • the third substrate 31 has a plurality of protruding portions 31P that protrude from the end surface 35 toward the intersection line 48 in a range not connected to the second substrate 21 with respect to the intersection line direction D1.
  • the third surface 33 of the protruding portion 31P is positioned within the same imaginary plane as the third surface 33 of the portion other than the protruding portion 31P.
  • Such a substrate structure can be made, for example, using the method described in WO2020/170722.
  • the plurality of third antenna elements 32 are arranged in the range in which the projecting portion 31P is provided with respect to the intersection direction D1. At least a portion of each of the plurality of third antenna elements 32 is arranged on the projecting portion 31P.
  • the second antenna element 22 is arranged on the second substrate 21 between two protrusions 31P adjacent to each other in the direction of intersection D1.
  • the dielectric member 40 is arranged on the second surface 23 of the second substrate 21 between two protruding portions 31P adjacent to each other in the intersection line direction D1. In FIG. 6A, the dielectric member 40 is indicated by dashed lines.
  • the excellent effects of the fifth embodiment will be described.
  • the fifth embodiment as in the first embodiment, it is possible to expand the coverage of the antenna device, broaden the band of the second antenna element 22, and improve the mechanical strength. Further, by providing the protrusion 31P on the third substrate 31 and arranging a part of the third antenna element 32 on the protrusion 31P, the dimension of the antenna device in the direction perpendicular to the first surface 13 can be reduced. can.
  • FIG. 7A is a cross-sectional view of the antenna device according to the sixth embodiment.
  • the third substrate 31 is connected to the second substrate 21 away from the first substrate 11 in the bending direction D2.
  • the third substrate 31 is not connected to the second substrate 21, and instead the second substrate 21 is curved in the direction of curvature D2 compared to the second substrate 21 of the first embodiment. It has an elongated shape.
  • the second substrate 21 is connected to the first substrate 11 via the connecting member 46, as in the antenna device (FIG. 4) according to the fourth embodiment.
  • a flexible substrate is used as the second substrate 21 .
  • the second substrate 21 includes a curved portion 21A connected to the first substrate 11 and a flat portion 21B continuous with the curved portion 21A.
  • the flat portion 21B is connected to the first substrate 11 via the curved portion 21A.
  • a second antenna element 22A is arranged on the curved portion 21A, and another second antenna element 22B is arranged on the flat portion 21B.
  • a dielectric member 40 is in close contact with the second surface 23A on the outer peripheral side of the curved portion 21A and the second surface 23B of the flat portion 21B continuous therewith.
  • a high-frequency integrated circuit 60 is mounted on the surface of the first substrate 11 opposite to the first surface 13 .
  • the second antenna elements 22A and 22B are connected to the high frequency integrated circuit 60 via the feed line 24 and the connection member 46 arranged on the second substrate 21 and the feed line 14 arranged on the first substrate 11.
  • the excellent effects of the sixth embodiment will be described.
  • the flat portion 21B of the second substrate 21, which is a flexible substrate is used in place of the flat third substrate 31 of the first embodiment (FIGS. 1A and 1B). Therefore, it is possible to flexibly adapt to the shape of the space inside the housing.
  • FIGS. 7B and 7C an antenna device according to a modification of the sixth embodiment will be described with reference to FIGS. 7B and 7C.
  • a second antenna element 22A and a second antenna element 22B are arranged on the curved portion 21A and the flat portion 21B of the second substrate 21, respectively.
  • the second antenna element 22A is arranged on the curved portion 21A of the second substrate 21, but no antenna element is arranged on the flat portion 21B.
  • Dielectric member 40 is in close contact with the area of second surface 23A that includes second antenna element 22A, but no dielectric member is arranged on second surface 23B of flat portion 21B.
  • the dielectric member 40 also adheres to the end surface 15 of the first substrate 11 .
  • the second antenna element 22B is arranged on the flat portion 21B of the second substrate 21, but no antenna element is arranged on the curved portion 21A.
  • the dielectric member 40 is in close contact with the area of the second surface 23A that includes the second antenna element 22B, but the dielectric member is not arranged on the second surface 23A of the curved portion 21A.
  • the second antenna element 22A may be arranged only on the curved portion 21A of the second substrate 21, or the second antenna element 22A may be arranged only on the flat portion 21B.
  • An antenna element 22B may be arranged.
  • FIG. 8 is a cross-sectional view of the antenna device according to the seventh embodiment.
  • the configuration of the first substrate 11, the second substrate 21, the third substrate 31, the first antenna element 12, the second antenna element 22, the third antenna element 32, and the dielectric member 40 is the same as that of the antenna device according to the first embodiment ( 1A and 1B).
  • the first substrate 11, the first antenna element 12, etc. are accommodated in the housing 50. As shown in FIG.
  • the inner surface of the housing 50 includes a first area 56A and a second area 56B connected via a straight corner 55 formed by two planes intersecting.
  • the corner 55 does not necessarily have to be a sharp corner formed by two planes intersecting.
  • the first region 56A and the second region 56B may be connected via a curved surface having a certain curvature, or may be connected via a plane oblique to both the first region 56A and the second region 56B. may be connected
  • the first surface 13 of the first substrate 11 and the third surface 33 of the third substrate 31 are respectively adhered to the first area 56A and the second area 56B of the housing 50 by an adhesive layer 45 such as adhesive or double-sided tape.
  • an adhesive layer 45 such as adhesive or double-sided tape.
  • the housing 50 includes a first transmissive window 51, a second transmissive window 52, a third transmissive window 53, and a metal wall 54 around these transmissive windows.
  • the first transmissive window 51 includes the first antenna element 12 when the first region 56A is viewed in plan
  • the third transmissive window 53 includes the third antenna element 32 when the second region 56B is viewed in plan.
  • Radio waves radiated from the first antenna element 12 and the third antenna element 32 pass through the first transmission window 51 and the third transmission window 53, respectively, and are radiated to the outside of the housing 50. As shown in FIG.
  • the second transmissive window 52 is arranged at the corner 55 .
  • the first substrate 11 , the second substrate 21 , and the third substrate 31 are accommodated in the housing 50 with at least part of the second substrate 21 separated from the inner surface of the housing 50 .
  • the second surface 23 which is the surface on the outer peripheral side of the curved portion of the second substrate 21 , faces the inner surface of the corner portion 55 via the dielectric member 40 while being separated from the inner surface of the housing 50 . do.
  • Radio waves radiated from the second antenna element 22 pass through the dielectric member 40 and the second transmissive window 52 and are radiated to the outside of the housing 50 .
  • the first antenna element 12, the second antenna element 22, and the third antenna element 32 are primary wave sources, and the first transmission window 51, the second transmission window 52, and the third transmission window 53 are the first antenna element 12 and the third transmission window 53, respectively. It operates as a secondary wave source for the second antenna element 22 and the third antenna element 32 . That is, each point on the outer surface of the first transmissive window 51, the second transmissive window 52, and the third transmissive window 53 becomes the source of the secondary wave based on the Huygens-Fresnel principle.
  • the excellent effects of the seventh embodiment will be described. Since the dielectric member 40 is in close contact with the second substrate 21, the bandwidth of the second antenna element 22 can be widened. Furthermore, since the shape of the second substrate 21 is stabilized, an excellent effect is obtained that the work of attaching the first substrate 11, the second substrate 21, and the third substrate 31 to the housing 50 is facilitated.
  • the interval G3 between the first transmission window 51 and the third transmission window 53 corresponds to the interval between the secondary wave sources.
  • the distance G1 between the second transmission window 52 provided at the corner 55 and the first transmission window 51 and the distance between the second transmission window 52 and the third transmission window 53 are The interval G2 corresponds to the interval of the secondary wave sources.
  • the spacings G1 and G2 are preferably less than the free-space wavelength corresponding to the lowest frequency of the operating frequency bands of the first antenna element 12, the second antenna element 22 and the third antenna element 32. With this configuration, side lobes and grating lobes can be suppressed in the vicinity of the lowest frequency of the operating frequency band. More preferably, the spacings G1 and G2 are less than the free-space wavelength corresponding to the highest frequency of the operating frequency band. With this configuration, side lobes and grating lobes can be suppressed in almost the entire operating frequency band.
  • the communication device according to the eighth embodiment includes the antenna device according to any one of the first to seventh embodiments or its modification.
  • FIG. 9 is a block diagram of a communication device according to an eighth embodiment.
  • a communication device according to the eighth embodiment includes a baseband integrated circuit (BBIC) 80 , a radio frequency integrated circuit (RFIC) 60 and an antenna device 57 .
  • BBIC baseband integrated circuit
  • RFIC radio frequency integrated circuit
  • Antenna device 57 includes a plurality of antenna elements 58 .
  • the plurality of antenna elements 58 includes, for example, the first antenna element 12, the second antenna element 22, the third antenna element 32, etc. of the first embodiment (FIG. 1A).
  • the baseband integrated circuit 80 and the high-frequency integrated circuit 60 are housed in a housing 50 common to the housing 50 of the antenna device 57 (FIG. 8).
  • the high frequency integrated circuit 60 is mounted on the first substrate 11 of the antenna device (FIG. 6) according to the sixth embodiment shown in FIG.
  • the high frequency integrated circuit 60 includes an intermediate frequency amplifier 61, an up/down conversion mixer 62, a transmission/reception selector switch 63, a power divider 64, a plurality of phase shifters 65, a plurality of attenuators 66, a plurality of transmission/reception selector switches 67, and a plurality of power amplifiers. 68 , a plurality of low-noise amplifiers 69 , and a plurality of transmission/reception selector switches 70 .
  • An intermediate frequency signal is input from the baseband integrated circuit 80 to the up/down conversion mixer 62 via the intermediate frequency amplifier 61 .
  • the up-down conversion mixer 62 up-converts the intermediate frequency signal to generate a high frequency signal.
  • the generated high frequency signal is input to the power divider 64 via the transmission/reception selector switch 63 .
  • Each high-frequency signal distributed by the power divider 64 is input to the antenna element 58 via the phase shifter 65 , attenuator 66 , transmission/reception selector switch 67 , power amplifier 68 , and transmission/reception selector switch 70 .
  • a high-frequency signal received by each of the plurality of antenna elements 58 is input to power divider 64 via transmission/reception selector switch 70 , low-noise amplifier 69 , transmission/reception selector switch 67 , attenuator 66 , and phase shifter 65 .
  • the high-frequency signal synthesized by the power divider 64 is input to the up/down conversion mixer 62 via the transmission/reception selector switch 63 .
  • the up-down conversion mixer 62 down-converts the high frequency signal to generate an intermediate frequency signal.
  • the generated intermediate frequency signal is input to baseband integrated circuit 80 via intermediate frequency amplifier 61 .
  • the up-down conversion mixer 62 may employ a direct conversion method in which the high-frequency signal is directly down-converted to the baseband signal.
  • the antenna device 57 included in the communication device according to the eighth embodiment the antenna device according to any one of the first to seventh embodiments or its modification can be used, so that a wide band can be achieved. , can extend the range of beamforming.
  • First substrate 12 First antenna element 13 First surface 14 Feeder line 15 End face 16 of first substrate Ground plane 21 Second substrate 21A Curved portion 21B of second substrate Flat portion 22 Second antenna element 22A Curved 2nd antenna element 22B at the portion 2nd antenna element 23 at the flat portion 2nd surface (surface on the outer peripheral side of the curved portion) 23A Second surface 23B of the curved portion of the second substrate Second surface 24 of the flat portion of the second substrate Feeder line 31 Third substrate 31P Protruding portion 32 Third antenna element 33 Third surface 34 Feeder line 35 End face of the third substrate 40 Dielectric member 45 Adhesive layer 46 Connection member 48 Intersection line 50 between a virtual plane containing the first surface and a virtual plane containing the third surface 50 Housing 51 First transmission window 52 Second transmission window 53 Third transmission window 54 Metal Wall 55 Corner 56A First area 56B on the inner surface of the housing Second area 57 on the inner surface of the housing Antenna device 58 Antenna element 60 Radio frequency integrated circuit (RFIC) 61 Intermediate frequency amplifier 62 Up-down conversion mixer 63

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  • Details Of Aerials (AREA)

Abstract

Un second substrat est relié à un premier substrat. Des premiers éléments d'antenne qui émettent des ondes radio dans une première direction sont disposés sur le premier substrat. Des seconds éléments d'antenne qui émettent des ondes radio dans une direction différente de la première direction sont disposés sur le second substrat. Des éléments diélectriques sont disposés dans la région de la surface du second substrat qui comprend au moins la région dans laquelle les seconds éléments d'antenne sont disposés.
PCT/JP2022/034203 2021-09-28 2022-09-13 Appareil d'antenne et appareil de communication WO2023053941A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200021015A1 (en) * 2018-07-13 2020-01-16 Samsung Electronics Co., Ltd. Antenna structure and electronic device comprising antenna
WO2020066453A1 (fr) * 2018-09-27 2020-04-02 株式会社村田製作所 Dispositif d'antenne et dispositif de communication
WO2020170722A1 (fr) * 2019-02-20 2020-08-27 株式会社村田製作所 Module d'antenne, dispositif de communication sur lequel un module d'antenne est monté, et procédé de fabrication de module d'antenne

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200021015A1 (en) * 2018-07-13 2020-01-16 Samsung Electronics Co., Ltd. Antenna structure and electronic device comprising antenna
WO2020066453A1 (fr) * 2018-09-27 2020-04-02 株式会社村田製作所 Dispositif d'antenne et dispositif de communication
WO2020170722A1 (fr) * 2019-02-20 2020-08-27 株式会社村田製作所 Module d'antenne, dispositif de communication sur lequel un module d'antenne est monté, et procédé de fabrication de module d'antenne

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