Phased array antenna device

Abstract

To provide a phased array antenna device that can ensure beam symmetry.SOLUTION: A phased array antenna device 100 includes a substrate 10, an antenna array 20, and wiring 30. The substrate 10 has an extension region 40 extending outside the antenna array 20. The extension region 40 includes a first extension portion 41 extending in one direction of a first direction Y relative to the antenna array 20, and a second extension portion 42 extending in the other direction of the first direction Y. The extension length L1 of the first extension portion 41 and the extension length L2 of the second extension portion 42 relative to the antenna array 20 are equal. First wiring 31 formed in the first extension portion 41 and second wiring 32 formed in the second extension portion 42 are arranged in a plan view so as to be symmetrical with respect to a line A1 that passes through the center 20a of the antenna array 20 and is perpendicular to the first direction Y.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a phased array antenna device. [Background technology]

[0002] In the field of high-speed wireless communication, microwave devices have been proposed (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-161633 Summary of the Invention [Problem to be solved by the invention]

[0004] In this device, it was sometimes difficult to ensure beam symmetry in a given direction, for example, when using a large circuit board to mount electronic components such as connectors or when installing a sub-circuit board, the beam symmetry could be lost.

[0005] An object of one aspect of the present invention is to provide a phased array antenna device that can ensure beam symmetry. [Means for solving the problem]

[0006] A phased array antenna device according to a first aspect of the present invention comprises a substrate, an antenna array having a plurality of antenna elements formed in an array on the substrate, and wiring formed on the substrate and electrically connected to the antenna array, wherein the substrate has an extension region extending outside the antenna array in a planar view, the extension region including a first extension portion extending relative to the antenna array in one direction of a first direction parallel to a surface of the substrate, and a second extension portion extending in the other direction of the first direction, wherein the extension lengths of the first extension portion and the second extension portion relative to the antenna array are equal, and the wiring formed in the first extension portion and the wiring formed in the second extension portion are arranged in a line symmetry in a planar view, with a straight line passing through the center of the antenna array and perpendicular to the first direction as an axis of symmetry.

[0007] According to the first aspect of the present invention, the extension length of the first extension section relative to the antenna array is equal to the extension length of the second extension section, so that the influence of interference waves from the substrate on the beam from the antenna array is equalized between the first extension section side and the second extension section side, thereby ensuring symmetry of the beam in the first direction.

[0008] The wiring formed in the first extension section and the wiring formed in the second extension section are arranged so as to be line-symmetric. This allows for uniform matching of electrical connections in the wiring, thereby improving the symmetry of the beam in the first direction.

[0009] A second aspect of the present invention is a phased array antenna device according to the first aspect, further comprising: an RFIC provided on the substrate and electrically connected to the antenna array; a filter provided on the substrate and electrically connected to the RFIC; and a combiner provided on the substrate and electrically connected to the RFIC, wherein the RFIC, the filter, and the combiner are each arranged in a plane view so as to be symmetrical with respect to a line passing through the center of the antenna array as an axis of symmetry.

[0010] A third aspect of the present invention is the phased array antenna device according to the first or second aspect, wherein the extension region is provided with at least one connector electrically connected to the wiring.

[0011] A fourth aspect of the present invention is a phased array antenna device according to any one of the first to third aspects, wherein a plurality of connectors electrically connected to the wiring are provided in the extension area, and the plurality of connectors are arranged in a planar view so as to be symmetrical with respect to a line passing through the center of the antenna array as an axis of symmetry.

[0012] A fifth aspect of the present invention is a phased array antenna device according to any one of the first to fourth aspects, wherein the extension region further includes a third extension portion that extends relative to the antenna array in one direction of a second direction that is parallel to the surface of the substrate and perpendicular to the first direction, and a fourth extension portion that extends relative to the antenna array in the other direction of the second direction, and the extension lengths of the first extension portion, the second extension portion, the third extension portion, and the fourth extension portion relative to the antenna array are equal to each other.

[0013] A sixth aspect of the present invention is a phased array antenna device according to the fifth aspect, wherein the wiring formed in the third extension section and the wiring formed in the fourth extension section are arranged in a planar view so as to be symmetrical with respect to a line passing through the center of the antenna array as the axis of symmetry. [Effects of the Invention]

[0014] One aspect of the present invention provides a phased array antenna device that can ensure beam symmetry. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a plan view of a phased array antenna device according to a first embodiment. [Figure 2] FIG. 10 is a plan view of a phased array antenna device according to a second embodiment. [Figure 3] FIG. 10 is a plan view of a phased array antenna device according to a third embodiment. [Figure 4] FIG. 10 is a plan view of a phased array antenna device according to a fourth embodiment. [Figure 5] FIG. 10 is a plan view of a phased array antenna device according to a fifth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0016] A phased array antenna device according to an embodiment of the present invention will be described below with reference to the drawings.

[0017] [Phased array antenna device] (first embodiment) FIG. 1 is a plan view of a phased array antenna device 100 according to the first embodiment. As shown in FIG. 1, the phased array antenna device 100 includes a substrate 10, an antenna array 20, and a plurality of wirings 30.

[0018] The X direction and the Y direction are parallel to the first main surface 10a (surface) of the substrate 10. The X direction and the Y direction are perpendicular to each other. A plan view is a view from a direction perpendicular to the first main surface 10a. The Y direction is an example of a first direction. The X direction is an example of a second direction.

[0019] +Y is one direction in the Y direction. +Y is upward in FIG. 1. -Y is the other direction in the Y direction. -Y is downward in FIG. 1. -Y is the opposite direction to +Y. +X is one direction in the X direction. +X is right in FIG. 1. -X is the other direction in the X direction. -X is left in FIG. 1. -X is the opposite direction to +X.

[0020] The antenna array 20 is formed on the first main surface 10a of the substrate 10. The antenna array 20 is composed of a plurality of antenna elements 21. Each antenna element 21 has, for example, a rectangular shape (e.g., a square shape) having two sides parallel to the X direction and two sides parallel to the Y direction. The antenna elements 21 transmit and receive high-frequency signals such as millimeter waves.

[0021] The plurality of antenna elements 21 are formed in an array. Specifically, the plurality of antenna elements 21 are arranged, for example, in a rectangular lattice (matrix) aligned in the X and Y directions. In this embodiment, the antenna array 20 is configured with a total of 32 antenna elements 21, four aligned in the Y direction and eight aligned in the X direction.

[0022] The antenna array 20 is formed in a rectangular shape as a whole. For example, the antenna array 20 has a rectangular shape having two sides parallel to the X direction and two sides parallel to the Y direction. For example, the antenna array 20 has a rectangular shape whose dimension in the X direction is greater than its dimension in the Y direction. A center 20a of the antenna array 20 coincides with the center of gravity of the antenna array 20.

[0023] The antenna element 21 is made of a conductive material such as metal (copper, etc.) The antenna element 21 is formed by, for example, an additive method, a subtractive method, or the like.

[0024] The substrate 10 has a rectangular shape with two sides parallel to the X direction and two sides parallel to the Y direction. In this embodiment, the substrate 10 has a rectangular shape with a dimension in the Y direction greater than a dimension in the X direction. The substrate 10 has an extension region 40 that extends outside the antenna array 20 in a plan view. The extension region 40 is a region of the substrate 10 that corresponds to the outside of the antenna array 20.

[0025] The expansion area 40 includes a first expansion portion 41, a second expansion portion 42, a third expansion portion 43, and a fourth expansion portion 44. The first extension part 41 is the part of the extension region 40 that extends in the +Y direction with respect to the antenna array 20. The second extension part 42 is the part of the extension region 40 that extends in the -Y direction with respect to the antenna array 20. The third extension part 43 is the part of the extension region 40 that extends in the +X direction with respect to the antenna array 20. The fourth extension part 44 is the part of the extension region 40 that extends in the -X direction with respect to the antenna array 20.

[0026] The extension length L1 of the first extension part 41 with respect to the antenna array 20 is equal to the extension length L2 of the second extension part 42 with respect to the antenna array 20. Thereby, the influence of the interference wave from the substrate 10 on the beam radiated from the antenna array 20 can be equalized between the first extension part 41 side and the second extension part 42 side. The interference wave is an electromagnetic wave that propagates from the antenna array 20 through the inside and surface of the substrate 10 and is radiated from the peripheral edge of the substrate 10.

[0027] In this specification, "equal" is not limited to the case where two numerical values are exactly the same. Even when the two numerical values are different, they are regarded as "equal" when the difference is small. For example, when the difference between the two numerical values is 10% or less of the smaller numerical value, these two numerical values can be regarded as equal. Specifically, when L1 < L2, when the difference between L1 and L2 is 10% or less of L1, L1 and L2 can be regarded as equal.

[0028] The extension length L3 of the third extension part 43 with respect to the antenna array 20 is equal to the extension length L4 of the fourth extension part 44 with respect to the antenna array 20. Thereby, the influence of the interference wave from the substrate 10 on the beam radiated from the antenna array 20 can be equalized between the third extension part 43 side and the fourth extension part 44 side.

[0029] The wiring 30 is formed on the first main surface 10a of the substrate 10. The wiring 30 is electrically connected to the antenna array 20. The wiring 30 is formed from a conductive material such as metal (copper, etc.). The wiring 30 is formed by, for example, an additive method, a subtractive method, etc. The wiring 30 may also be formed from a conductive ink.

[0030] The multiple wirings 30 include one or more first wirings 31, one or more second wirings 32, one or more third wirings 33, and one or more fourth wirings 34. The wirings 30 are, for example, signal lines that transmit high-frequency signals, power supply wiring that supplies power to an RFIC (not shown), digital wiring, etc. The wirings 30 may be dummy wirings. The wirings 30 may be formed on the surface of the substrate 10 or may be formed inside the substrate 10.

[0031] The first wiring 31 is formed in the first extension portion 41. The first wiring 31 extends from the antenna array 20 to the +Y side. In this embodiment, six first wirings 31 are formed. The six first wirings 31 extend to the +Y side from six antenna elements 21, excluding the two antenna elements 21 located at both ends in the X direction, out of the eight antenna elements 21 located furthest to the +Y side. The first wiring 31 may be electrically connected to the antenna elements 21 via an RFIC or the like (not shown). The first wiring 31 may be directly and electrically connected to the antenna elements 21.

[0032] The first wirings 31 are parallel to the Y direction. The lengths of the multiple first wirings 31 are equal to each other. The multiple first wirings 31 are formed at equal intervals. The line widths of the multiple first wirings 31 are equal to each other.

[0033] The second wiring 32 is formed in the second extension portion 42. The second wiring 32 extends from the antenna array 20 to the -Y side. In this embodiment, six second wirings 32 are formed. The six second wirings 32 extend to the -Y side from six antenna elements 21, excluding the two antenna elements 21 located at both ends in the X direction, out of the eight antenna elements 21 located furthest to the -Y side. The second wiring 32 may be electrically connected to the antenna elements 21 via an RFIC or the like (not shown). The second wiring 32 may be directly and electrically connected to the antenna elements 21.

[0034] The second wirings 32 are parallel to the Y direction. The lengths of the multiple second wirings 32 are equal to each other. The multiple second wirings 32 are formed at equal intervals. The line widths of the multiple second wirings 32 are equal to each other.

[0035] The length of the second wiring 32 is equal to the length of the first wiring 31. The spacing between the multiple second wirings 32 is equal to the spacing between the multiple first wirings 31. The line width of the second wiring 32 is equal to the line width of the first wiring 31.

[0036] The first wiring 31 and the second wiring 32 are arranged in a plan view so as to be symmetrical about a line A1. The line A1 passes through the center 20a of the antenna array 20 and is perpendicular to the Y direction. The line A1 is parallel to the X direction.

[0037] The third wiring 33 is formed in the third extension section 43. The third wiring 33 extends from the antenna array 20 to the +X side. In this embodiment, two third wirings 33 are formed. The two third wirings 33 extend to the +X side from two antenna elements 21, excluding the two antenna elements 21 located at both ends in the Y direction, out of the four antenna elements 21 closest to the +X side. The third wiring 33 may be electrically connected to the antenna elements 21 via an RFIC or the like (not shown). The third wiring 33 may be directly and electrically connected to the antenna elements 21.

[0038] The third wirings 33 are parallel to the X direction. The lengths of the third wirings 33 are equal to each other. The line widths of the third wirings 33 are equal to each other.

[0039] The fourth wiring 34 is formed in the fourth extension portion 44. The fourth wiring 34 extends from the antenna array 20 to the -X side. In this embodiment, two fourth wirings 34 are formed. The two fourth wirings 34 extend to the -X side from two antenna elements 21, excluding the two antenna elements 21 located at both ends in the Y direction, out of the four antenna elements 21 closest to the -X side. The fourth wiring 34 may be electrically connected to the antenna elements 21 via an RFIC or the like (not shown). The fourth wiring 34 may be directly and electrically connected to the antenna elements 21.

[0040] The fourth wirings 34 are parallel to the X direction. The lengths of the plurality of fourth wirings 34 are equal to each other. The line widths of the plurality of fourth wirings 34 are equal to each other.

[0041] The length of the fourth wiring 34 is equal to the length of the third wiring 33. The spacing between the multiple fourth wirings 34 is equal to the spacing between the multiple third wirings 33. The line width of the fourth wiring 34 is equal to the line width of the third wiring 33.

[0042] The third wiring 33 and the fourth wiring 34 are arranged in a plan view so as to be symmetrical about a line A2. The line A2 passes through the center 20a of the antenna array 20 and is perpendicular to the X direction. The line A2 is parallel to the Y direction.

[0043] [Effects of the phased array antenna device according to the first embodiment] In the phased array antenna device 100, the extension length L1 of the first extension portion 41 and the extension length L2 of the second extension portion 42 relative to the antenna array 20 are equal. This reduces the difference between the influence of the interference wave from the first extension portion 41 on the beam and the influence of the interference wave from the second extension portion 42 on the beam. Therefore, the influence of the interference wave from the substrate 10 on the beam from the antenna array 20 is equalized between the first extension portion 41 side and the second extension portion 42 side. This ensures symmetry of the beam in the Y direction.

[0044] The first wiring 31 formed in the first extension portion 41 and the second wiring 32 formed in the second extension portion 42 are arranged so as to be symmetrical with respect to an axis. This makes it possible to equalize the matching of the electrical connections in the wirings 31 and 32. This makes it possible to improve the symmetry of the beam in the Y direction.

[0045] In the phased array antenna device 100, the extension length L3 of the third extension portion 43 relative to the antenna array 20 is equal to the extension length L4 of the fourth extension portion 44 relative to the antenna array 20. This equalizes the influence of interference waves from the substrate 10 on the beam from the antenna array 20 between the third extension portion 43 side and the fourth extension portion 44 side. This ensures symmetry of the beam in the X direction.

[0046] The third wiring 33 formed in the third extension portion 43 and the fourth wiring 34 formed in the fourth extension portion 44 are arranged so as to be axisymmetric. This makes it possible to equalize the matching of the electrical connections in the wirings 33 and 34. This makes it possible to improve the symmetry of the beam in the X direction.

[0047] [Phased array antenna device] (Second embodiment) 2 is a plan view of a phased array antenna device 200 according to the second embodiment. The same components as those in the other embodiments are denoted by the same reference numerals and will not be described.

[0048] 2, the phased array antenna device 200 includes a substrate 10 (see FIG. 1), an antenna array 20 (see FIG. 1), a plurality of wirings 30 (see FIG. 1), a plurality of RFICs 50, a plurality of filters / combiners 60, and a plurality of wirings 70. The RFICs 50, the filters / combiners 60, and the wirings 70 are formed on a second main surface 10b of the substrate 10 (the surface opposite to the first main surface 10a).

[0049] The RFIC 50 is an integrated circuit (RFIC: Radio Frequency Integrated Circuit) that processes high-frequency signals such as millimeter waves. The RFIC 50 has, for example, a rectangular shape in a plan view. The RFIC 50 is electrically connected to the antenna array 20 (see FIG. 1).

[0050] The plurality of RFICs 50 includes a first RFIC group 51 and a second RFIC group 52 . The first RFIC group 51 includes a plurality of RFICs 50 arranged parallel to the Y direction. In this embodiment, the first RFIC group 51 is composed of four RFICs 50. The second RFIC group 52 includes a plurality of RFICs 50 arranged parallel to the Y direction. In this embodiment, the second RFIC group 52 is composed of four RFICs 50. The first RFIC group 51 and the second RFIC group 52 are arranged at an interval in the X direction.

[0051] The multiple RFICs 50 are arranged in a plan view so as to be line-symmetrical about the straight line A1. Specifically, if the two RFICs 50 on the +Y side of the first RFIC group 51 and the two RFICs 50 on the +Y side of the second RFIC group 52 are defined as the "RFICs 50 on the +Y side," and the two RFICs 50 on the -Y side of the first RFIC group 51 and the two RFICs 50 on the -Y side of the second RFIC group 52 are defined as the "RFICs 50 on the -Y side," then the four RFICs 50 on the +Y side and the four RFICs 50 on the -Y side are positioned so as to be line-symmetrical about the straight line A1.

[0052] The filter / combiner 60 includes a filter and a combiner. The filter attenuates signals of frequencies other than a predetermined frequency band. The combiner combines, for example, signals of a predetermined frequency. The filter / combiner 60 has, for example, a rectangular shape in a plan view. The filter / combiner 60 is electrically connected to the RFIC 50.

[0053] The plurality of filters / combiners 60 are arranged parallel to the Y direction. In this embodiment, four filters / combiners 60 are arranged along the Y direction. The multiple filters / combiners 60 are arranged in a line symmetrical manner with respect to the line A1 in a plan view. Specifically, the two filters / combiners 60 on the +Y side and the two filters / combiners 60 on the -Y side are positioned in a line symmetrical manner with respect to the line A1.

[0054] The multiple wirings 70 include multiple first wirings 71 and multiple second wirings 72. The first wirings 71 are electrically connected to the RFICs 50 of the first RFIC group 51. The first wirings 71 extend from the RFICs 50 of the first RFIC group 51 to the +X side. The second wirings 72 are electrically connected to the RFICs 50 of the second RFIC group 52. The second wirings 72 extend from the RFICs 50 of the second RFIC group 52 to the -X side. The first wirings 71 and the second wirings 72 extend in directions away from each other.

[0055] Wirings 71 and 72 connected to the four RFICs 50 on the +Y side and wirings 71 and 72 connected to the four RFICs 50 on the -Y side are positioned to be line-symmetrical with respect to line A1.

[0056] The RFICs 50 included in the first RFIC group 51 and the RFICs 50 included in the second RFIC group 52 may be positioned so as to be line-symmetric with respect to the line A2. The first wiring 71 and the second wiring 72 may be positioned so as to be line-symmetric with respect to the line A2.

[0057] [Effects of the phased array antenna device according to the second embodiment] The phased array antenna device 200 has the following advantages in addition to the advantages of the phased array antenna device 100 according to the first embodiment. In the phased array antenna device 200, the multiple RFICs 50 are positioned so as to be line-symmetric with respect to the line A1 as the axis of symmetry. The multiple filters / combiners 60 are positioned so as to be line-symmetric with respect to the line A1 as the axis of symmetry. This allows the matching of the electrical connections in the RFICs 50 and the filters / combiners 60 to be equalized between one side (+Y side) and the other side (-Y side) in the Y direction. This allows the symmetry of the beam in the Y direction to be improved.

[0058] In the phased array antenna device 200, the multiple RFICs 50 are positioned to be line-symmetric with respect to the line A2. Therefore, the matching of the electrical connections in the RFICs 50 can be made uniform between one side (+X side) and the other side (-X side) in the X direction. This can improve the symmetry of the beam in the X direction.

[0059] [Phased array antenna device] (third embodiment) 3 is a plan view of a phased array antenna device 300 according to the third embodiment. The same components as those in the other embodiments are denoted by the same reference numerals and will not be described.

[0060] As shown in Figure 3, the phased array antenna device 300 includes a substrate 10 (see Figure 1), an antenna array 20 (see Figure 1), a plurality of wirings 30 (see Figure 1), a plurality of RFICs 50, a plurality of filters / combiners 60, a connector 81, and a plurality of wirings 90.

[0061] The phased array antenna device 300 differs from the phased array antenna device 200 of the second embodiment (see FIG. 2) in that a connector 81 is provided on the second main surface 10b of the substrate 10. In the phased array antenna device 300, wiring 90 is formed on the second main surface 10b instead of the wiring 70 (see FIG. 2).

[0062] The connector 81 is provided at a position close to the edge of the −X side of the substrate 10. The connector 81 has a length in the Y direction. The connector 81 can be detachably connected to, for example, a connector connected to another device. The connector 81 can be connected to, for example, a device for digital control, signal input, etc.

[0063] The plurality of wirings 90 includes a plurality of first wirings 91 and a plurality of second wirings 92. The first wirings 91 electrically connect the four RFICs 50 on the +Y side to the connector 81. The second wirings 92 electrically connect the four RFICs 50 on the −Y side to the connector 81.

[0064] Wiring 91 connected to four RFICs 50 on the +Y side and wiring 92 connected to four RFICs 50 on the −Y side are positioned to be line-symmetric with respect to line A1 as the axis of symmetry.

[0065] [Effects of the phased array antenna device according to the third embodiment] The phased array antenna device 300 has the following advantages in addition to the advantages of the phased array antenna device 100 according to the first embodiment. The phased array antenna device 300 includes a connector 81, so that it can be connected to devices for digital control, signal input, etc.

[0066] [Phased array antenna device] (fourth embodiment) 4 is a plan view of a phased array antenna device 400 according to the fourth embodiment. The same components as those in the other embodiments are denoted by the same reference numerals and will not be described.

[0067] As shown in Figure 4, the phased array antenna device 400 includes a substrate 10 (see Figure 1), an antenna array 20 (see Figure 1), a plurality of wirings 30 (see Figure 1), a plurality of RFICs 50, a plurality of filters / combiners 60, a first connector 82, a second connector 83, and a plurality of wirings 70.

[0068] The phased array antenna device 400 differs from the phased array antenna device 300 of the third embodiment (see FIG. 3) in that two connectors (a first connector 82 and a second connector 83) are provided on the second main surface 10b of the substrate 10.

[0069] The first connector 82 is provided at a position close to one side edge (+X side) in the X direction of the substrate 10. The first connector 82 has a length in the Y direction. The second connector 83 is provided at a position close to the other side edge (-X side) in the X direction of the substrate 10. The second connector 83 has a length in the Y direction.

[0070] The first connector 82 and the second connector 83 are detachably connected to, for example, connectors connected to other devices. The first connector 82 and the second connector 83 are connectable to, for example, devices for digital control, signal input, etc. The first connector 82 and the second connector 83 are positioned so as to be symmetrical with respect to the line A2.

[0071] The multiple wirings 70 include multiple first wirings 71 and multiple second wirings 72. The first wirings 71 electrically connect the RFICs 50 in the first RFIC group 51 to the first connector 82. The second wirings 72 electrically connect the RFICs 50 in the second RFIC group 52 to the second connector 83.

[0072] The wiring 71, 72 connected to the four +Y side RFICs 50 and the wiring 71, 72 connected to the four -Y side RFICs 50 are positioned symmetrically with respect to the line A1. The first wiring 71 and the second wiring 72 are positioned symmetrically with respect to the line A2.

[0073] [Effects of the phased array antenna device according to the fourth embodiment] The phased array antenna device 400 has the following advantages in addition to the advantages of the phased array antenna devices 100 and 200 according to the first and second embodiments.

[0074] In the phased array antenna device 400, the first connector 82 and the second connector 83 are arranged symmetrically with respect to the line A2, so that the influence of the interference wave on the beam can be equalized between one side and the other side in the X direction, thereby improving the symmetry of the beam.

[0075] [Phased array antenna device] (fifth embodiment) 5 is a plan view of a phased array antenna device 500 according to the fifth embodiment. The same components as those in the other embodiments are denoted by the same reference numerals and will not be described.

[0076] As shown in FIG. 5, the phased array antenna device 500 includes a substrate 110, an antenna array 120, and a plurality of wirings 130.

[0077] The antenna array 120 is formed on the first main surface 110a (front surface) of the substrate 110. The antenna array 120 is composed of a plurality of antenna elements 21. The plurality of antenna elements 21 are formed in an array. In this embodiment, the antenna array 120 is composed of a total of 64 antenna elements 21, with eight elements arranged in the Y direction and eight elements arranged in the X direction.

[0078] The antenna array 120 is formed in a rectangular shape as a whole. For example, the antenna array 120 has a rectangular shape with two sides parallel to the X direction and two sides parallel to the Y direction. For example, the antenna array 120 has a square shape with the same dimension in the X direction and the same dimension in the Y direction. A center 120a of the antenna array 120 coincides with the center of gravity of the antenna array 120.

[0079] The substrate 110 has a rectangular shape with two sides parallel to the X direction and two sides parallel to the Y direction. In this embodiment, the substrate 110 has a square shape with the same dimension in the Y direction and the same dimension in the X direction. The substrate 110 has an extension region 140 that extends outside the antenna array 120 in a plan view. The extension region 140 is a region of the substrate 110 that corresponds to the outside of the antenna array 120.

[0080] The expansion region 140 includes a first expansion portion 141, a second expansion portion 142, a third expansion portion 143, and a fourth expansion portion 144. The first extension section 141 is a portion of the extension region 140 that extends toward the +Y side with respect to the antenna array 120. The second extension section 142 is a portion of the extension region 140 that extends toward the -Y side with respect to the antenna array 120. The third extension section 143 is a portion of the extension region 140 that extends toward the +X side with respect to the antenna array 120. The fourth extension section 144 is a portion of the extension region 140 that extends toward the -X side with respect to the antenna array 120.

[0081] The extension length L11 of the first extension section 141, the extension length L12 of the second extension section 142, the extension length L13 of the third extension section 143, and the extension length L14 of the fourth extension section 144 relative to the antenna array 120 are all equal. This makes it possible to equalize the influence of interference waves from the substrate 110 on the beam radiated from the antenna array 120 between the first extension section 141 side, the second extension section 142 side, the third extension section 143 side, and the fourth extension section 144 side.

[0082] The plurality of wirings 130 includes one or more first wirings 131, one or more second wirings 132, one or more third wirings 133, and one or more fourth wirings 134.

[0083] The first wiring 131 is formed in the first extension portion 141. The first wiring 131 extends from the antenna array 120 to the +Y side. The second wiring 132 is formed in the second extension portion 142. The second wiring 132 extends from the antenna array 120 to the -Y side. The third wiring 133 is formed in the third extension portion 143. The third wiring 133 extends from the antenna array 120 to the +X side. The fourth wiring 134 is formed in the fourth extension portion 144. The fourth wiring 134 extends from the antenna array 120 to the -X side. The first wiring 131, the second wiring 132, the third wiring 133, and the fourth wiring 134 have the same length.

[0084] The first wiring 131 and the second wiring 132 are arranged so as to be symmetrical about a line A1 in a plan view, and the third wiring 133 and the fourth wiring 134 are arranged so as to be symmetrical about a line A2 in a plan view.

[0085] [Effects of the phased array antenna device according to the fifth embodiment] The phased array antenna device 500 has the following advantages in addition to the advantages of the phased array antenna device 100 according to the first embodiment. In the phased array antenna device 500, the extension length L11 of the first extension portion 141, the extension length L12 of the second extension portion 142, the extension length L13 of the third extension portion 143, and the extension length L14 of the fourth extension portion 144 relative to the antenna array 120 are all equal. This makes it possible to equalize the influence of interference waves from the substrate 110 on the beam radiated from the antenna array 120 between the first extension portion 141 side, the second extension portion 142 side, the third extension portion 143 side, and the fourth extension portion 144 side. This ensures symmetry of the beam in multiple directions.

[0086] The technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, the number of antenna elements 21 constituting the antenna array 20 shown in Fig. 1 is 32, but the number of antenna elements constituting the antenna array is not particularly limited. In the phased array antenna devices 300 and 400 shown in Fig. 3 and Fig. 4, the number of connectors is one or two, but the number of connectors is not particularly limited and may be at least one. The number of connectors may be one or more (any number equal to or greater than two).

[0087] In addition, it is possible to replace the components in the above-described embodiments with well-known components as appropriate, and the above-described embodiments and variations may be combined as appropriate, without departing from the spirit of the present invention. [Explanation of symbols]

[0088] 10,110...substrate, 10a,110a...first main surface (surface), 20,120...antenna array, 20a,120a...center, 21...antenna element, 30,70,90...wiring, 31,131...first wiring (wiring formed in first extension portion), 32,132...second wiring (wiring formed in second extension portion), 33,133...third wiring, 34,134...fourth wiring, 40,140...extension region, 41,141...first extension portion, 42,142...second extension portion, 43,143...third extension portion, 44, 144...fourth extension portion, 50...RFIC, 60...filter / combiner, 81...connector, 82...first connector (connector), 83...second connector (connector), 100, 200, 300, 400, 500...phased array antenna device, A1...straight line perpendicular to the first direction, A2...straight line perpendicular to the second direction, L1, L11...extension length of the first extension portion, L2, L12...extension length of the second extension portion, L3, L13...extension length of the third extension portion, L4, L14...extension length of the fourth extension portion

Claims

1. A substrate; an antenna array having a plurality of antenna elements formed in an array on the substrate; Wiring formed on the substrate and electrically connected to the antenna array; Equipped with the substrate has an extension region that extends outside the antenna array in a plan view; the extension region includes a first extension portion that extends in one direction of a first direction parallel to a surface of the substrate with respect to the antenna array, and a second extension portion that extends in the other direction of the first direction; an extension length of the first extension portion and an extension length of the second extension portion relative to the antenna array are equal; the wiring formed in the first extension portion and the wiring formed in the second extension portion are arranged in a plan view so as to be symmetrical with respect to a line that passes through the center of the antenna array and is perpendicular to the first direction. Phased array antenna device.

2. an RFIC mounted on the substrate and electrically connected to the antenna array; a filter provided on the substrate and electrically connected to the RFIC; a combiner provided on the substrate and electrically connected to the RFIC; Furthermore, The RFIC, the filter, and the combiner are each arranged in line symmetry with respect to a line passing through the center of the antenna array in a plan view. The phased array antenna device according to claim 1 .

3. At least one connector electrically connected to the wiring is provided in the expansion area. The phased array antenna device according to claim 1 .

4. a plurality of connectors electrically connected to the wiring are provided in the expansion area; the plurality of connectors are arranged in a line symmetrical manner with respect to a line passing through the center of the antenna array in a plan view; The phased array antenna device according to claim 1 .

5. The expansion region is a third extension portion that extends from the antenna array in one direction of a second direction that is parallel to the surface of the substrate and perpendicular to the first direction; a fourth extension portion that extends in the other direction of the second direction relative to the antenna array; further comprising the extension lengths of the first extension, the second extension, the third extension, and the fourth extension with respect to the antenna array are equal to one another; A phased array antenna device according to any one of claims 1 to 4.

6. the wiring formed in the third extension section and the wiring formed in the fourth extension section are arranged to be symmetrical with respect to a line passing through the center of the antenna array in a plan view.

6. The phased array antenna device according to claim 5.

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