Antenna device

Abstract

An antenna device is provided with: a waveguide tube section (12) on the inside of which a waveguide duct (12a) is formed; and a chamber forming section (16) in which a chamber (15) communicating with the waveguide line via a power supply opening (14) is formed. In a cross-section in one direction, which is a cross-section in the height direction (Dh) and the width direction (Dw), an inclined wall surface (163f) of a first side wall (163a) of the chamber-forming portion is formed so that the distance (W1) in the width direction from the power supply opening to the inclined wall surface becomes larger toward one side in the height direction. In addition, in a cross section in one direction, an inclined wall surface (163h) of a second side wall (163b) of the chamber forming part is also formed in a manner that the distance (W2) in the width direction from the power supply opening to the inclined wall surface becomes larger toward one side in the height direction.

Description

Technical Field

[0001] The present disclosure relates to an antenna device. Background Art

[0002] At present, in an antenna device having four radiation openings, there is known a structure in which the propagation path of the radio wave is branched in a tournament shape by using two first branches that branch the propagation path of the radio wave and four second branches that branch the propagation path of the radio wave. For example, such an antenna device is described in Patent Document 1.

[0003] Prior Art Literature

[0004] Patent Literature

[0005] Patent Document 1: International Publication No. 2022 / 122319 Summary of the invention

[0006] If the propagation path of the radio wave is branched in parallel as in Patent Document 1, it is easy to align the phases of the radio waves at the four radiation openings. However, in the structure of Patent Document 1, the first branch and the second branch need to be stacked, which inevitably increases the size (physique) of the antenna device. The above situation was discovered after detailed research by the inventors.

[0007] An object of the present disclosure is to provide an antenna device that can easily align the phases of radio waves at a plurality of radiation openings while suppressing an increase in size (physique).

[0008] In order to achieve the above-mentioned object, an antenna device according to one aspect of the present disclosure comprises:

[0009] a waveguide portion having a waveguide path formed therein for propagating radio waves; and

[0010] The cavity forming portion forms a cavity inside, the cavity being provided on one side of the waveguide tube in the first direction and communicating with the waveguide tube via the power supply opening.

[0011] The chamber forming portion comprises: an opening wall portion facing the chamber from the other side opposite to the one side in the first direction and formed with a power supply opening; an opposing wall portion facing the chamber from one side in the first direction and formed with a plurality of radiation openings and opposite to the opening wall portion; and a side wall portion surrounding the chamber between the opening wall portion and the opposing wall portion, facing the chamber and connecting the opening wall portion and the opposing wall portion.

[0012] The plurality of radiation openings communicate the chamber with the external space to propagate radio waves between the chamber and the external space, and three or more of the plurality of radiation openings are arranged in a second direction perpendicular to the first direction.

[0013] In the first cross-section along the first direction and the second direction, the side wall portion has a second direction change surface on one side and the other side of the second direction relative to the power supply opening, respectively. The second direction change surface faces the chamber and is formed in such a way that the distance in the second direction from the power supply opening increases as the side approaches the first direction.

[0014] The shape of the second direction change surface is defined so that, compared to a case where the second direction change surface is not provided in the first section and the distance in the second direction from the power supply opening to the side wall portion is fixed regardless of the position in the first direction, the phase deviation of the radio waves at the plurality of radiation openings is reduced when radio waves of a specified wavelength propagate from the power supply opening to the chamber.

[0015] In this way, the path length of the radio wave propagating between each of the plurality of radiation openings and the power supply opening and the reflection structure of the radio wave are adjusted by setting the shape of the second direction-changing surface. Therefore, there is the following advantage: even if more than three radiation openings are arranged in the second direction, it is easy to align the phases of the radio waves at the radiation openings.

[0016] Furthermore, since a single cavity is used to distribute radio waves to three or more radiation openings, the size of the antenna device in the first direction can be suppressed from increasing compared to a conventional structure in which a radio wave propagation path is branched in parallel.

[0017] Therefore, according to the antenna device of the present embodiment, it is possible to obtain the effect of easily aligning the phases of radio waves at three or more radiation openings arranged in the second direction while suppressing the expansion of the size of the antenna device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a plan view schematically showing a general structure of a device including an antenna apparatus in the first embodiment.

[0019] Figure 2 It is shown Figure 1 Cross-sectional view of section II-II.

[0020] Figure 3 yes Figure 2 An enlarged view of part III.

[0021] Figure 4 It is a perspective view schematically showing the antenna device according to the first embodiment.

[0022] Figure 5 This is an exploded perspective view schematically showing the antenna device according to the first embodiment in an exploded state.

[0023] Figure 6 It is selected Figure 1Figure VI of the diagram.

[0024] Figure 7 It is shown Figure 1 Cross-sectional view of section VII-VII.

[0025] Figure 8 It is an explanatory diagram for explaining the radiation directivity of the antenna device according to the first comparative example in comparison with the first embodiment.

[0026] Fig. 9 It is an explanatory diagram for explaining the radiation directivity of the antenna device according to the first embodiment.

[0027] Fig.10 The first modification example of the first embodiment schematically shows Figure 3 A cross-sectional view of the cross-section of the antenna device corresponding to the cross-section of .

[0028] Fig.11 is a schematic diagram showing the second modification of the first embodiment. Figure 3 A cross-sectional view of the cross-section of the antenna device corresponding to the cross-section of .

[0029] Fig.12 is a schematic diagram showing the third modification of the first embodiment. Figure 3 A cross-sectional view of the cross-section of the antenna device corresponding to the cross-section of .

[0030] Fig.13 In the second embodiment, Figure 1 The figure of the part equivalent to part VI is the same as Figure 6 Quite an overhead view.

[0031] Fig.14 The second embodiment shows Fig.13 Cross-sectional view of section XIV-XIV.

[0032] Fig.15 The second embodiment shows Fig.13 Cross-sectional view of section XV-XV.

[0033] Fig.16 is a schematic diagram showing the first modification of the second embodiment. Fig.15 A cross-sectional view of the cross-section of the antenna device corresponding to the cross-section of .

[0034] Fig.17 is a schematic diagram showing the second modification of the second embodiment. Fig.15 A cross-sectional view of the cross-section of the antenna device corresponding to the cross-section of .

[0035] Fig.18 is a schematic diagram showing the third modification of the second embodiment. Fig.15 A cross-sectional view of the cross-section of the antenna device corresponding to the cross-section of .

[0036] Fig.19 This is a perspective view schematically showing a cavity and a plurality of radiation openings extracted from the antenna device in the third embodiment, and is a view showing shapes of the cavity and the plurality of radiation openings.

[0037] Fig. 20 1 is a perspective view schematically showing the antenna device according to the fourth embodiment, and is a diagram showing an image of the shape of a cavity.

[0038] Fig.21 is an exploded perspective view schematically showing an antenna device according to a fifth embodiment of the present invention after being decomposed. Figure 5 Quite a picture.

[0039] Fig. 22 is an exploded perspective view schematically showing an antenna device according to a sixth embodiment by disassembling it. Figure 5 Quite a picture.

[0040] Fig.23 is a schematic diagram showing the sixth embodiment with Figure 3 A cross-sectional view of the cross-section of the antenna device corresponding to the cross-section of .

[0041] Fig.24 In the sixth embodiment Fig.23 The XXIV direction view is the same as Figure 6 Quite an overhead view.

[0042] Fig.25 is a schematic diagram showing the seventh embodiment and Figure 3 A cross-sectional view of the cross-section of the antenna device corresponding to the cross-section of .

[0043] Fig.26 In the seventh embodiment Fig.25 The XXVI direction view is the same as Figure 6 Quite an overhead view.

[0044] Fig. 27 is a cross-sectional view schematically showing an antenna device in an eighth embodiment, Figure 2 Quite a picture.

[0045] Fig.28 is a cross-sectional view schematically showing an antenna device in a ninth embodiment, Figure 2 Quite a picture.

[0046] Fig.29 is a cross-sectional view schematically showing an antenna device in a tenth embodiment, Figure 2 Quite a picture.

[0047] Fig.30 is a cross-sectional view schematically showing an antenna device in the eleventh embodiment, Figure 2 Quite a picture.

[0048] Fig.31 It is a plan view schematically showing a general structure of a device including an antenna apparatus in the twelfth embodiment. DETAILED DESCRIPTION

[0049] Hereinafter, each embodiment will be described with reference to the drawings. In addition, in each of the following embodiments, the same or equivalent parts are denoted by the same reference numerals in the drawings.

[0050] (First Embodiment)

[0051] In this embodiment, if Figure 1 , Figure 2 As shown, an example in which the antenna device 1 of the present disclosure is applied to a device including an MMIC 2 as an electrical component will be described. "MMIC" is an abbreviation of Monolithic Microwave Integrated Circuit.

[0052] In the description of this embodiment, in order to indicate the direction of the antenna device 1, the Figure 1 , Figure 2 The height direction Dh, width direction Dw and width orthogonal direction Dwp shown. The height direction Dh, width direction Dw and width orthogonal direction Dwp mentioned above are directions that intersect each other, and strictly speaking, are directions that are perpendicular to each other. In addition, in this embodiment, the height direction Dh corresponds to the first direction of the present disclosure, the width direction Dw corresponds to the second direction of the present disclosure, and the width orthogonal direction Dwp corresponds to the third direction of the present disclosure.

[0053] MMIC2 is a semiconductor device including an input / output unit 3 for transmitting and receiving radio waves. MMIC2 is a transceiver device provided corresponding to the antenna device 1. In this embodiment, the operating frequency of the radio waves transmitted and received by MMIC2 is set to a frequency band corresponding to millimeter waves. In addition, the operating frequency of the radio waves transmitted and received by MMIC2 is not limited to the frequency corresponding to millimeter waves, and may also be a frequency other than millimeter waves.

[0054] The electrical substrate 4 is a printed circuit board formed with a plurality of wiring patterns by a conductive member such as a metal foil. The thickness direction of the electrical substrate 4 coincides with the height direction Dh described above. The electrical substrate 4 has a surface F1 formed on one side of the height direction Dh and another surface F2 formed on the other side of the height direction Dh. In addition, the MMIC 2 is mounted on one surface F1 of the electrical substrate 4.

[0055] On one surface F1 of the electric board 4 , a plurality of spacers 5 are arranged in addition to the MMIC 2 . The spacers 5 are made of, for example, a conductive material. The spacers 5 are fixed to the electric board 4 .

[0056] The antenna device 1 is disposed on one surface F1 of the electric board 4 via the MMIC 2 and the plurality of spacers 5. The antenna device 1 is fixed to the electric board 4 by screwing, bonding, or the like in a state of being in contact with the MMIC 2 and the plurality of spacers 5, respectively.

[0057] The antenna device 1 is an antenna for transmitting radio waves transmitted and received by the MMIC 2. Figure 2 , Figure 3 As shown, the antenna device 1 is a structure ST having a stacked structure in which three conductive blocks BC1, BC2, and BC3 are stacked in the height direction Dh. The three blocks BC1, BC2, and BC3 are made of metal blocks.

[0058] In addition, at least one of the three blocks BC1, BC2, and BC3 may not be a metal block, but may be a block formed by, for example, forming a conductive film such as a metal film on the surface of a resin block by plating, or a block formed by a conductive material other than metal.

[0059] In addition, although Figure 1 The II-II section line does not pass through the power supply opening 14, but Figure 2 In order to make it easier to see, the power supply opening 14 is shown in cross-section. Figure 3 and Figure 3 The same is also applied to the cross-sectional views described later.

[0060] The antenna device 1 includes three blocks BC1, BC2, and BC3, which are connected to each other by screwing, bonding, etc. The antenna device 1 is fixed to the electric board 4 in a posture where the height direction Dh coincides with the thickness direction of the electric board 4.

[0061] The three blocks BC1, BC2, and BC3 constituting the antenna device 1 are specifically a first block BC1, a second block BC2, and a third block BC3. The first block BC1, the second block BC2, and the third block BC3 are stacked in the order of the first block BC1, the second block BC2, and the third block BC3 from the side close to the electrical substrate 4, that is, the other side in the height direction Dh.

[0062] The three blocks BC1, BC2, and BC3 are formed into the same rectangular shape when viewed along the height direction Dh, that is, when viewed from above. The three blocks BC1, BC2, and BC3 are formed into the same size when viewed from above so as to overlap each other in the height direction Dh.

[0063] Part of the mutually facing surfaces of the first block BC1 and the second block BC2 are in contact with each other. Also, part of the mutually facing surfaces of the second block BC2 and the third block BC3 are in contact with each other. Thus, the three blocks BC1, BC2, and BC3 are electrically connected.

[0064] As for the first block BC1, the surface of the first block BC1 located on the other side of the height direction Dh is opposite to the one side F1 of the electric board 4 via the MMIC 2 and the plurality of spacers 5. Although not shown in the figure, the first block BC1 is electrically connected to the ground pattern included in the wiring pattern formed on the one side F1 of the electric board 4 via at least a part of the plurality of spacers 5. Since the second block BC2 and the third block BC3 are electrically connected to the first block BC1, they are electrically connected to the ground pattern of the electric board 4 via the first block BC1. The ground pattern of the electric board 4 is set to the ground potential.

[0065] The first block BC1 has an external port 11 provided to propagate radio waves between the external port 11 and the MMIC 2. The external port 11 is formed at a position facing the input / output unit 3 of the MMIC 2 in the first block BC1. Thus, radio waves can propagate between the external port 11 and the MMIC 2.

[0066] The first block BC1 and the second block BC2 form a waveguide portion 12 included in a waveguide that serves as a propagation path for radio waves. In this embodiment, since the external port 11 opens in the waveguide portion 12, the entire waveguide portion 12 serves as a waveguide. Therefore, the portions of the first block BC1 and the second block BC2 that form the waveguide portion 12 constitute a waveguide.

[0067] The waveguide portion 12 is formed by coupling a pair of groove portions 121 and 122 formed at locations facing each other in the height direction Dh in the first block BC1 and the second block BC2 .

[0068] The first block BC1 has a first groove 121 formed at a location facing the second block BC2. The first groove 121 is a bottomed groove that is recessed from one side to the other side in the height direction Dh. The external port 11 is formed on the bottom surface of the first groove 121.

[0069] The second block BC2 has a second groove 122 formed at a position opposite to the first groove 121 of the first block BC1. The second groove 122 is a bottomed groove recessed from the other side to one side in the height direction Dh. The bottom surface of the second groove 122 has a power supply opening 14 described below.

[0070] The waveguide portion 12 has a waveguide path 12a for propagating radio waves formed inside thereof. The waveguide path 12a is a cavity formed by the combination of the first groove portion 121 and the second groove portion 122, and extends along the pipeline extension direction Da. In the present embodiment, the pipeline extension direction Da is consistent with the width direction Dw. In addition, one side of the pipeline extension direction Da is also one side of the width direction Dw, and the other side of the pipeline extension direction Da is also the other side of the width direction Dw.

[0071] like Figure 4 , Figure 5 As shown, the cross section (ie, transverse section) of the waveguide 12a perpendicular to the tube extension direction Da is a rectangular shape extending along the height direction Dh. That is, the dimension of the waveguide 12a in the height direction Dh is larger than the dimension in the perpendicular width direction Dwp.

[0072] like Figure 1 to Figure 3 As shown, the waveguide path 12a extends from the vicinity of the external port 11 to the vicinity of the power supply opening 14 described later. The waveguide portion 12 has a pair of end walls 123 and 124 constituting the ends of the waveguide path 12a at both ends of the waveguide path 12a in the path extension direction Da. Specifically, the first end wall 123, which is one of the pair of end walls 123 and 124, is provided at the end of the waveguide path 12a located on one side of the path extension direction Da. In addition, the second end wall 124, which is the other of the pair of end walls 123 and 124, is provided at the end of the waveguide path 12a located on the other side of the path extension direction Da.

[0073] The second end wall 124 is composed of a planar wall extending in a direction orthogonal to the pipeline extension direction Da. The second end wall 124 is arranged near the external port 11. Specifically, the second end wall 124 is arranged on the other side of the pipeline extension direction Da relative to the external port 11, and faces the waveguide 12a toward one side of the pipeline extension direction Da.

[0074] The first end wall 123 is composed of a planar wall extending in a direction orthogonal to the pipeline extension direction Da. The first end wall 123 is provided as a short-circuit wall and is arranged near the power supply opening 14 described later. Specifically, the first end wall 123 is provided on one side of the pipeline extension direction Da relative to the opening position of the power supply opening 14 relative to the opening of the waveguide path 12a, and faces the waveguide path 12a toward the other side of the pipeline extension direction Da.

[0075] The positional relationship between the feed opening 14 and the first end wall 123 is set in consideration of the coupling between the waveguide 12a and the cavity 15 described later. In other words, the antenna device 1 controls the coupling between the waveguide 12a and the cavity 15 described later using the distance between the feed opening 14 and the first end wall 123.

[0076] In the second block BC2, a power supply opening 14 is formed on the bottom surface of the second groove portion 122 forming the waveguide 12a. The power supply opening 14 is a port for propagating radio waves between the waveguide 12a and a cavity 15 described later. The power supply opening 14 is formed as a through hole that penetrates between the waveguide 12a and the cavity 15 in the second block BC2 in the height direction Dh. The power supply opening 14 is formed at a position in the second block BC2 that does not overlap with the external port 11 in the height direction Dh.

[0077] The power supply opening 14 is formed in a rectangular shape extending in the width direction Dw in a plan view. The power supply opening 14 may be shaped other than a rectangle, for example, an oval shape, a rhombus shape, or the like.

[0078] Here, the waveguide section 12 has a reflection suppression wall 13 provided in the waveguide path 12a to suppress reflection of radio waves. The reflection suppression wall 13 is provided on the other side of the opening position of the power supply opening 14 with respect to the waveguide path 12a in the path extending direction Da.

[0079] The reflection suppression wall 13 is composed of a pair of protruding walls 131 and 132 separated from each other in the height direction Dh and arranged on the waveguide 12a. The first protruding wall 131, which is one of the pair of protruding walls 131 and 132, is provided in a manner protruding from the bottom surface of the first groove portion 121 toward one side of the height direction Dh. In addition, the second protruding wall 132, which is the other of the pair of protruding walls 131 and 132, is provided in a manner protruding from the bottom surface of the second groove portion 122 toward the other side of the height direction Dh. The first protruding wall 131 and the second protruding wall 132 are provided in the waveguide 12a in such a manner that the positions in the pipe extension direction Da are the same as each other. In addition, the first protruding wall 131 and the second protruding wall 132 are configured in such a manner that the height, thickness, and shape are substantially the same. In addition, the first protruding wall 131 and the second protruding wall 132 are at a height that does not contact each other.

[0080] Here, the position, height, thickness, and shape of each of the first protruding wall 131 and the second protruding wall 132 affect the impedance of the space between the first end wall 123 and the reflection suppression wall 13 in the waveguide 12a. Therefore, it is desirable that the position, height, thickness, and shape of the first protruding wall 131 and the second protruding wall 132 be set so that the impedance of the space between the first end wall 123 and the reflection suppression wall 13 in the waveguide 12a matches the impedance of the chamber 15.

[0081] The second block BC2 and the third block BC3 have a cavity forming portion 16 formed across the second and third blocks BC2 and BC3. A cavity 15 is formed inside the cavity forming portion 16. The cavity 15 is a hollow formed between the second block BC2 and the third block BC3.

[0082] The cavity 15 is arranged adjacent to the waveguide path 12a on one side in the height direction Dh, and is connected to the waveguide path 12a via the power supply opening 14. For example, the cavity 15 is formed into a flat shape extending in the width direction Dw and the width-orthogonal direction Dwp. In addition, the shape of the cavity 15 when viewed from above is a rectangular shape, the length direction of the cavity 15 is the width direction Dw, and the width direction of the cavity 15 is the width-orthogonal direction Dwp. In this embodiment, the portion of the second block BC2 and the third block BC3 that forms the cavity 15 constitutes the cavity forming portion 16.

[0083] The cavity forming portion 16 includes an opening wall portion 161 adjacent to the waveguide portion 12 and forming the power supply opening 14 , an opposing wall portion 162 opposing the opening wall portion 161 in the height direction Dh, and a side wall portion 163 connecting the opening wall portion 161 and the opposing wall portion 162 .

[0084] like Figure 3 , Figure 6 , Figure 7 As shown, the opening wall 161 is arranged on the other side of the height direction Dh relative to the chamber 15, and faces the chamber 15 from the other side of the height direction Dh. On the other hand, the opposing wall 162 is arranged on one side of the height direction Dh relative to the chamber 15, and faces the chamber 15 from the one side of the height direction Dh.

[0085] In addition, the shapes of the opening wall portion 161 and the opposing wall portion 162 when viewed from above are each set to a rectangular shape. Specifically, the opening wall portion 161 and the opposing wall portion 162 are each formed into a rectangular shape extending along the width direction Dw. Among them, although the opening wall portion 161 and the opposing wall portion 162 are the same size as each other in the width orthogonal direction Dwp, the opening wall portion 161 is formed smaller than the opposing wall portion 162 in the width direction Dw. In detail, in the width direction Dw, the opening wall portion 161 is formed in such a way that the entire width of the opening wall portion 161 falls inside the width of the opposing wall portion 162.

[0086] The side wall portion 163 is provided between the opening wall portion 161 and the opposing wall portion 162 in the height direction Dh, and faces the chamber 15 while surrounding the chamber 15 between the opening wall portion 161 and the opposing wall portion 162. Specifically, the side wall portion 163 has four side walls 163a, 163b, 163c, and 163d connecting the four sides of the opening wall portion 161 and the four sides of the opposing wall portion 162. The four side walls 163a, 163b, 163c, and 163d are a first side wall 163a, a second side wall 163b, a third side wall 163c, and a fourth side wall 163d.

[0087] The first side wall 163a is arranged on one side of the width direction Dw relative to the chamber 15 and the power supply opening 14, and the second side wall 163b is arranged on the other side of the width direction Dw relative to the chamber 15 and the power supply opening 14. That is, the first side wall 163a and the second side wall 163b are arranged opposite to each other in the width direction Dw across the chamber 15. Therefore, the first side wall 163a and the second side wall 163b have a cross section in one direction (for example, Figure 3 In this embodiment, the one-direction cross section corresponds to the first cross section of the present disclosure.

[0088] The first side wall 163a and the second side wall 163b respectively include: a vertical wall surface 163e, 163g facing the chamber 15; and an inclined wall surface 163f, 163h arranged on the other side of the height direction Dh relative to the vertical wall surface 163e, 163g and facing the chamber 15. In the present embodiment, the inclined wall surfaces 163f, 163h correspond to the second direction change surface of the present disclosure.

[0089] The inclined wall surface 163f of the first side wall 163a is disposed between the vertical wall surface 163e of the first side wall 163a and the opening wall portion 161, and the vertical wall surface 163e is connected to the opening wall portion 161. In addition, the inclined wall surface 163h of the second side wall 163b is disposed between the vertical wall surface 163g of the second side wall 163b and the opening wall portion 161, and the vertical wall surface 163g is connected to the opening wall portion 161.

[0090] The vertical wall surfaces 163e and 163g of the first and second side walls 163a and 163b are respectively formed as planes with the width direction Dw as the normal direction. In contrast, the inclined wall surfaces 163f and 163h of the first and second side walls 163a and 163b are respectively formed as inclined surfaces that are planes extending along the width orthogonal direction Dwp but are inclined with respect to the height direction Dh.

[0091] In detail, for example Figure 3 In the cross section in one direction shown, the inclined wall surface 163f of the first side wall 163a is formed in such a way that the distance W1 in the width direction Dw from the power supply opening 14 to the inclined wall surface 163f increases continuously as it approaches the height direction Dh. Similarly, in the cross section in one direction, the inclined wall surface 163h of the second side wall 163b is also formed in such a way that the distance W2 in the width direction Dw from the power supply opening 14 to the inclined wall surface 163h increases continuously as it approaches the height direction Dh.

[0092] In the present embodiment, the inclined wall surfaces 163f and 163h are formed in the second block BC2, and the vertical wall surfaces 163e and 163g are formed in the third block BC3.

[0093] like Figure 5 , Figure 7 As shown, the third side wall 163c is arranged on one side of the width orthogonal direction Dwp relative to the chamber 15 and the power supply opening 14, and the fourth side wall 163d is arranged on the other side of the width orthogonal direction Dwp relative to the chamber 15 and the power supply opening 14. That is, the third side wall 163c and the fourth side wall 163d are arranged opposite to each other in the width orthogonal direction Dwp across the chamber 15. In addition, the third side wall 163c and the fourth side wall 163d each form a planar wall surface that is not inclined relative to the height direction Dh and faces the chamber 15 with the width orthogonal direction Dwp as the normal direction.

[0094] In the cavity 15 thus formed, the dimension in the width direction Dw is as follows: Figure 3 , Figure 5 , Figure 6 As shown, the cavity 15 is larger than the dimension in the width-orthogonal direction Dwp and the dimension in the height direction Dh. In addition, the cavity 15 is formed in a shape that is widened on both the one side and the other side of the width-orthogonal direction Dwp relative to the waveguide 12a. That is, the dimension of the cavity 15 in the width-orthogonal direction Dwp is larger than the dimension of the waveguide 12a in the width-orthogonal direction Dwp.

[0095] The cavity 15 of the present embodiment is formed by coupling a pair of recessed portions 151 and 152 formed at locations facing each other in the height direction Dh in the second block BC2 and the third block BC3 .

[0096] The first concave portion 151, which is one of the pair of concave portions 151 and 152, is formed in a portion of the second block BC2 that is opposite to the third block BC3. The first concave portion 151 is recessed from one side to the other side in the height direction Dh. The power supply opening 14 is formed in the opening wall portion 161 that becomes the bottom surface of the first concave portion 151. Thus, radio waves can propagate between the power supply opening 14 and the chamber 15.

[0097] In addition, the second recess 152, which is the other of the pair of recesses 151 and 152, is formed in a portion of the third block BC3 that is opposite to the second block BC2. The second recess 152 is recessed from the other side of the height direction Dh to one side. A plurality of radiation openings 17 constituting the antenna radiation element are formed in the opposing wall portion 162 that is the bottom surface of the second recess 152.

[0098] Thus, radio waves can propagate between the power supply opening 14 and the plurality of radiation openings 17 via the cavity 15. The cavity 15 of this embodiment functions as a branching unit that distributes radio waves from the power supply opening 14 to the plurality of radiation openings 17 for propagation.

[0099] The plurality of radiation openings 17 are formed as through holes that penetrate the opposing wall portion 162 in the height direction Dh. Thus, the cavity 15 is connected to the external space SP of the antenna device 1 through the plurality of radiation openings 17. Furthermore, radio waves can propagate between the cavity 15 and the external space SP through each of the plurality of radiation openings 17. In other words, the plurality of radiation openings 17 respectively connect the cavity 15 with the external space SP, and propagate radio waves between the cavity 15 and the external space SP.

[0100] The plurality of radiation openings 17 are of the same shape as each other, and are rectangular in shape extending along the width direction Dw when viewed from above. For example, the dimension of the radiation opening 17 in the width direction Dw is configured to be approximately 0.5 to 1 times the wavelength of the radio wave at the operating frequency. The wavelength of the radio wave at the operating frequency is the wavelength of the radio wave at a representative frequency included in the operating frequency, and can be interpreted as the wavelength of the radio wave at the center frequency of the operating frequency, for example.

[0101] like Figure 6 As shown, the plurality of radiation openings 17 are arranged at intervals in the width direction Dw and the width-orthogonal direction Dwp. Specifically, six radiation openings 17 are provided, three are arranged at equal intervals in the width direction Dw, and two are arranged in the width-orthogonal direction Dwp. That is, the plurality of radiation openings 17 are arranged in a 3×2 grid-like configuration.

[0102] The antenna device 1 of this embodiment is configured to align the phases of the radio waves at the plurality of radiation openings 17 in order to avoid that the radio waves of the prescribed wavelength cancel each other at the plurality of radiation openings 17. The structure for achieving this will be described below. In addition, the "prescribed wavelength" is sometimes referred to as "prescribed wavelength". In addition, the prescribed wavelength is preferably the same as the wavelength of the radio wave at the operating frequency.

[0103] In this embodiment, if Figure 3 As shown, since there are three radiation openings 17 arranged in the width direction Dw, it is impossible to set the path lengths of the radio waves propagating between each radiation opening 17 and the power supply opening 14, that is, the radio wave path lengths, to be the same. However, even if the radio wave path lengths between each radiation opening 17 and the power supply opening 14 are different from each other, as long as the difference in the radio wave path lengths is an integer multiple of the wavelength of the propagated radio wave, that is, the prescribed wavelength, it is considered that the phases of the radio waves are aligned.

[0104] Based on this idea, in order to align the phases of radio waves of a specified wavelength at a plurality of radiation openings 17, the shape of the inclined walls 163f and 163h of the cavity forming portion 16 is set to adjust the radio wave path length and the reflection structure between each radiation opening 17 and the power supply opening 14. The shape of the inclined walls 163f and 163h is represented by at least one of the orientation and size of the inclined walls 163f and 163h, for example.

[0105] In detail, Figure 3 In the cross section in one direction shown, when the direction or size of the inclined wall surface 163f of the first side wall 163a is changed, the length La of the wall surface including the inclined wall surface 163f and connecting the power supply opening 14 and the radiation opening 17 is changed accordingly. Figure 3 Indicated by dotted lines. In the present embodiment, the length La of the wall surface is adjusted to adjust the radio wave path length and the reflection structure between each radiation opening 17 and the power supply opening 14. This is also the case on the second side wall 163b. Furthermore, as a result of the adjustment of the radio wave path length and the reflection structure, the phase of the radio wave of a specified wavelength can be aligned in all of the multiple radiation openings 17. In addition, the phase alignment of the radio wave mentioned here does not mean that the phase of the radio wave is completely consistent, but that the deviation of the phase of the radio wave is reduced in a manner that falls within a certain allowable range specified from the perspective of practical application.

[0106] In other words, in this embodiment, compared with the antenna device of the first comparative example described below, the shape of each inclined wall surface 163f, 163h is specified in such a manner that the phase deviation of the radio waves at the plurality of radiation openings 17 is reduced when the radio waves of a specified wavelength propagate from the power supply opening 14 to the chamber 15.

[0107] The antenna device of the first comparative example is different from the antenna device 1 of the present embodiment in that the antenna device 1 has a Figure 3 The cavity 15 is a shape indicated by the double-dashed lines LC1 and LC2 in the one-direction cross section shown in FIG. That is, the antenna device of the first comparative example has a structure in which the inclined wall surfaces 163f and 163h are not provided in the one-direction cross section, and the distance in the width direction Dw from the power supply opening 14 to the side wall portion 163 is constant regardless of the position in the height direction Dh. Except for this structure, the antenna device of the first comparative example is the same as the antenna device 1 of the present embodiment.

[0108] For example, in this embodiment, the shapes of the inclined wall surfaces 163 f and 163 h of the cavity forming portion 16 are determined by executing computer simulation so that the phases of radio waves of a predetermined wavelength are aligned in all of the plurality of radiation openings 17 .

[0109] In addition, if Figure 3 , Figure 6 , Figure 7 As shown in FIG. 1 , in this embodiment, the cavity 15, the power supply opening 14, and the plurality of radiation openings 17 are collectively referred to as the cavity collection part 20. That is, the cavity 15, the power supply opening 14, and the plurality of radiation openings 17 constitute the cavity collection part 20. The cavity collection part 20 constitutes a space between the external space SP and the waveguide path 12a. Figure 3 As shown in FIG. 1 , the chamber assembly 20 is formed symmetrically with respect to the width direction Dw. Figure 7 The structure shown is also symmetrical with respect to the width orthogonal direction Dwp.

[0110] In addition, if Figure 3 , Figure 6 As shown in FIG. 1 , the power supply opening 14 is provided in the opening wall portion 161 in a manner overlapping the other side of the height direction Dh relative to the center position C of the chamber 15. In other words, the center position C of the chamber 15 is the position of the center of gravity of the chamber 15. Figure 6 The arrangement shown is such that it does not overlap with any of the plurality of radiation openings 17 in a plan view.

[0111] Here, if Figure 3 If the dimension Lst in the height direction Dh of the chamber 15 shown is too large, the propagation loss of the radio wave in the chamber 15 will increase. Therefore, it is desirable that the dimension Lst in the height direction Dh of the chamber 15 is set to be less than 2.0 times the wavelength of the radio wave at the operating frequency. In addition, in the present embodiment, the dimension Lst in the height direction Dh of the chamber 15 is smaller than both the dimension in the width direction Dw of the chamber 15 and the dimension in the width-orthogonal direction Dwp.

[0112] Next, the operation of the antenna device 1 will be described. Figure 1 to Figure 3 As shown, in the antenna device 1 of the present embodiment, for example, when a radio wave is output from the input / output unit 3 of the MMIC 2, the radio wave is input to the external port 11. The radio wave input to the external port 11 is as follows. Figure 3 As shown by arrow A1, the radio waves pass through the waveguide path 12a and the power supply opening 14 in this order and reach the chamber 15. The radio waves reaching the chamber 15 are distributed to the six radiation openings 17 in the chamber 15 as shown by arrows A2, A3, and A4, and are radiated from the six radiation openings 17 to the external space SP.

[0113] Here, the results of computer simulations performed on the antenna device of the first comparative example and the antenna device 1 of the present embodiment in the case where radio waves of a predetermined wavelength are input from the power supply opening 14 to the cavity 15 are described. As a result of the computer simulation, it was confirmed that in the antenna device of the first comparative example, the phase of the radio wave at the radiation opening 17 in the center of the width direction Dw is substantially opposite to the phase of the radio wave at the radiation openings 17 at both ends of the width direction Dw. In contrast, it was confirmed that in the antenna device 1 of the present embodiment, the phase of the radio wave at any of the three radiation openings 17 arranged along the width direction Dw is substantially the same. That is, as a result of the computer simulation, it was confirmed that in the antenna device 1 of the present embodiment, the deviation of the phase of the radio wave at the plurality of radiation openings 17 is significantly reduced compared to the antenna device of the first comparative example.

[0114] Due to the phase deviation of the radio waves, the directivity of the radio waves radiated from the plurality of radiation openings 17 becomes Figure 8 As shown in FIG. 1 , in the antenna device 1 of the present embodiment, Fig. 9 As shown.

[0115] Figure 8 , Fig. 9 Solid lines L1 and L3 show distribution of gain on a plane parallel to the height direction Dh and the width direction Dw. In addition, dotted lines L2 and L4 show distribution of gain on a plane parallel to the height direction Dh and the width orthogonal direction Dwp. Figure 8 , Fig. 9 0 degrees of the horizontal axis means that it is parallel to the height direction Dh and faces one side of the height direction Dh.

[0116] according to Figure 8 As can be seen from the solid line L1 in the horizontal axis range Bx of the antenna device 2 of the first comparative example, since the phases of the radio waves radiated from the radiation openings 17 are different, the radio waves cancel each other out, and the beam is not focused toward one side of the height direction Dh. In contrast, in the antenna device 1 of the present embodiment, according to Fig. 9 As can be seen from the solid line L3 in the horizontal axis range Bx, the radio waves radiated from each radiation opening 17 are aligned in phase to amplify the radio waves, and the beam is focused toward one side in the height direction Dh. Figure 8 , Fig. 9 It can be seen that in the antenna device 1 of the present embodiment, the directivity of the radio wave toward one side in the height direction Dh is improved compared with the antenna device of the first comparative example. Figure 8 , Fig. 9 The range Bx of the horizontal axis shows the same range in both figures.

[0117] Furthermore, for example, when the input / output unit 3 of the MMIC 2 receives radio waves from the external space SP, the antenna device 1 propagates in the opposite direction to the case where the input / output unit 3 outputs radio waves.

[0118] As described above, according to this embodiment, in a cross section in one direction (for example Figure 3 In the cross-section of the embodiment, the inclined wall surface 163f of the first side wall 163a is formed in such a way that the distance W1 in the width direction Dw from the power supply opening 14 to the inclined wall surface 163f increases toward the side of the height direction Dh. In addition, in the one-direction cross-section, the inclined wall surface 163h of the second side wall 163b is also formed in such a way that the distance W2 in the width direction Dw from the power supply opening 14 to the inclined wall surface 163h increases toward the side of the height direction Dh. Furthermore, compared with the antenna device of the first comparative example described above, the shape of each inclined wall surface 163f, 163h is specified in such a way that the phase deviation of the radio waves at the plurality of radiation openings 17 is reduced when the radio waves of a specified wavelength propagate from the power supply opening 14 to the cavity 15.

[0119] Therefore, the path length of the radio wave propagating between each of the plurality of radiation openings 17 and the power supply opening 14 and the reflection structure of the radio wave are adjusted by setting the shape of the inclined wall surfaces 163f and 163h. Therefore, there is an advantage that even if three or more radiation openings 17 are arranged in the width direction Dw, it is easy to align the phases of the radio waves at the radiation openings 17.

[0120] Furthermore, since the radio waves are distributed to three or more radiation openings 17 by a single cavity 15 , the size of the antenna device 1 in the height direction Dh can be suppressed from increasing compared to a conventional structure in which the propagation path of the radio waves is branched in a tournament shape.

[0121] Therefore, according to the antenna device 1 of the present embodiment, it is possible to obtain the effect of easily aligning the phases of radio waves at three or more radiation openings 17 arranged in the width direction Dw while suppressing the expansion of the size of the antenna device 1 .

[0122] In addition, since it is easy to align the phases of radio waves at the plurality of radiation openings 17 and simultaneously increase the number of radiation openings 17 in the width direction Dw without limitation, it is possible to realize a high gain of the antenna device 1 .

[0123] In addition, in a structure that branches the propagation path of radio waves in parallel, if three or more radiation openings are provided, a plurality of stacked structures are required for stacking portions that divide the radio waves of the waveguide into two, which causes an increase in manufacturing cost.

[0124] On the other hand, if a structure is adopted in which radio waves are distributed to six radiation openings 17 by using a single cavity 15 as in the present embodiment, the antenna device 1 can be realized with a simple stacked structure, and thus the manufacturing cost can be reduced.

[0125] (1) According to the present embodiment, the power supply opening 14 is provided so as to overlap the other side of the height direction Dh relative to the center position C of the cavity 15. Therefore, the radio waves are easily propagated uniformly in the cavity 15, and further, the phases of the radio waves at the plurality of radiation openings 17 can be aligned.

[0126] (2) According to the present embodiment, the cavity 15, the power supply opening 14, and the plurality of radiation openings 17 constitute a cavity collection section 20. The cavity collection section 20 is as follows: Figure 3 As shown in FIG. 1 , the chamber assembly 20 is formed symmetrically with respect to the width direction Dw. Figure 7 As shown, the radio waves are also formed symmetrically with respect to the width direction Dwp. Therefore, it is easy to make the radio waves propagate uniformly between each of the plurality of radiation openings 17 connected to the cavity 15 and the power supply opening 14, and further, it can help align the phases of the radio waves at the plurality of radiation openings 17.

[0127] (3) In addition, according to the present embodiment, the waveguide portion 12 has a first end wall 123 which is provided on one side of the opening position of the power supply opening 14 relative to the waveguide path 12a in the path extension direction Da and constitutes the end of the waveguide path 12a. In addition, the waveguide portion 12 has a reflection suppression wall 13 which is provided on the other side of the opening position of the power supply opening 14 in the path extension direction Da and suppresses reflection of radio waves.

[0128] According to this, the reflection suppression wall 13 reduces the influence of reflected waves from the first end wall 123 and the like, thereby suppressing the limitation of the bandwidth due to the influence of reflected waves. As a result, the bandwidth of the antenna device 1 can be increased.

[0129] (Modification of the first embodiment)

[0130] The antenna device 1 shown in the first embodiment can be modified as follows, for example. In addition, the multiple modified examples shown below are the same as the first embodiment described above in points other than the contents described below. In addition, as long as there are no special obstacles, the multiple modified examples shown below can also be applied to embodiments other than the first embodiment.

[0131] (First Modification)

[0132] In a first embodiment, if Figure 3As shown in FIG. 1 , the first side wall 163a and the second side wall 163b respectively have vertical wall surfaces 163e and 163g and inclined wall surfaces 163f and 163h facing the chamber 15, but this is an example. Fig.10 As shown, vertical wall surfaces 163e and 163g having the width direction Dw as the normal direction are not provided, but inclined wall surfaces 163f and 163h as inclined surfaces extend over the entire range of the height direction Dh of the chamber 15.

[0133] (Second Modification)

[0134] like Fig.11 As shown, in this modification, unlike the first embodiment, the inclined wall surfaces 163f and 163h of the first and second side walls 163a and 163b are not limited to the second block BC2, but extend from the second block BC2 to the third block BC3. Furthermore, in this modification, unlike the first embodiment, each inclined wall surface 163f and 163h is not an inclined surface composed of a plane inclined relative to the height direction Dh.

[0135] Specifically, the inclined wall surfaces 163f and 163h of this modification are formed by stepped surfaces that change in steps with respect to the distances W1 and W2 in the width direction Dw of the power supply opening 14. Fig.11 In the cross section, i.e., the one-direction cross section, the inclined wall surface 163f of the first side wall 163a is formed in such a manner that the distance W1 in the width direction Dw from the power supply opening 14 to the inclined wall surface 163f increases in a step-like manner as it approaches the height direction Dh. In addition, in the one-direction cross section, the inclined wall surface 163h of the second side wall 163b is also formed in such a manner that the distance W2 in the width direction Dw from the power supply opening 14 to the inclined wall surface 163h increases in a step-like manner as it approaches the height direction Dh.

[0136] In the case of this modification, as examples of the shape of the inclined wall surfaces 163f and 163h, the orientation of the surface of each part of the inclined wall surfaces 163f and 163h, the number of steps and the size of the inclined wall surfaces 163f and 163h formed by the step surface can be cited. In addition, as examples of the shape of the inclined wall surfaces 163f and 163h, the change ratio of the distances W1 and W2 in the width direction Dw from the power supply opening 14 to the inclined wall surfaces 163f and 163h relative to the position change in the height direction Dh can also be cited.

[0137] In the present modification, the stepped inclined wall surfaces 163f and 163h are related to both the second block BC2 and the third block BC3, but may be formed only on one of the second block BC2 and the third block BC3 and not on the other.

[0138] (Third Modification)

[0139] like Fig.12 As shown, in this modification, similarly to the second modification described above, the inclined wall surfaces 163f and 163h of the first and second side walls 163a and 163b are formed by stepped surfaces that change in a step-like manner relative to the distances W1 and W2 in the width direction Dw of the power supply opening 14. However, in this modification, the number of steps of the inclined wall surfaces 163f and 163h formed as stepped surfaces is greater than that of the second modification described above. That is, the number of steps of the inclined wall surfaces 163f and 163h can be any number of steps.

[0140] (Second Embodiment)

[0141] Next, the second embodiment is described. In this embodiment, the differences from the first embodiment are mainly described. In addition, the same or equivalent parts as the above-mentioned embodiment are omitted or simplified for description. This is also the case in the description of the embodiments described later.

[0142] like Figure 13 to Figure 15 As shown, in this embodiment, the radiation openings 17 are arranged in a 3×2 grid pattern, and a total of six are provided. In this respect, this embodiment is the same as the first embodiment, but in this embodiment, unlike the first embodiment, two of the plurality of radiation openings 17 are arranged in the width direction Dw and three are arranged at equal intervals in the width-orthogonal direction Dwp.

[0143] In addition, in this embodiment, the height direction Dh corresponds to the first direction of the present disclosure, which is the same as the first embodiment. However, in this embodiment, unlike the first embodiment, the width orthogonal direction Dwp corresponds to the second direction of the present disclosure, and the width direction Dw corresponds to the third direction of the present disclosure.

[0144] In addition, in this embodiment, the structure of the side wall portion 163 of the chamber forming portion 16 is different from that of the first embodiment. Fig.14 As shown, the first side wall 163a and the second side wall 163b of the side wall portion 163 are not inclined relative to the height direction Dh, but are parallel to the height direction Dh. In addition, the first side wall 163a and the second side wall 163b respectively form a planar wall surface facing the chamber 15 with the width direction Dw as a normal direction, and are arranged opposite to each other in the width direction Dw across the chamber 15.

[0145] like Fig.15As shown, since the third side wall 163c and the fourth side wall 163d of the side wall portion 163 are arranged opposite to each other in the width orthogonal direction Dwp across the chamber 15, the cross section along the height direction Dh and the width orthogonal direction Dwp, i.e., the cross section in another direction (e.g. Fig.15 In the present embodiment, the cross section in the other direction corresponds to the first cross section disclosed in the present invention. In addition, the cross section in the other direction is a cross section perpendicular to the cross section in the one direction described above.

[0146] In addition, although Fig.13 The XV-XV section line of the embodiment does not pass through the power supply opening 14, but Fig.15 In order to make it easier to see, the power supply opening 14 is shown in cross-section. Fig.15 The same is also applied to the cross-sectional views described later.

[0147] The third side wall 163c and the fourth side wall 163d respectively have: vertical wall surfaces 163i and 163k facing the chamber 15; and inclined wall surfaces 163j and 163m arranged on the other side of the height direction Dh relative to the vertical wall surfaces 163i and 163k and facing the chamber 15. In the present embodiment, the inclined wall surfaces 163j and 163m correspond to the second direction change surface of the present disclosure.

[0148] The inclined wall surface 163j of the third side wall 163c is disposed between the vertical wall surface 163i of the third side wall 163c and the opening wall portion 161, and the vertical wall surface 163i is connected to the opening wall portion 161. In addition, the inclined wall surface 163m of the fourth side wall 163d is disposed between the vertical wall surface 163k of the fourth side wall 163d and the opening wall portion 161, and the vertical wall surface 163k is connected to the opening wall portion 161.

[0149] The vertical wall surfaces 163i and 163k of the third and fourth side walls 163c and 163d are respectively formed as planes with the width-orthogonal direction Dwp as the normal direction. In contrast, the inclined wall surfaces 163j and 163m of the third and fourth side walls 163c and 163d are respectively formed as inclined surfaces that are planes extending along the width direction Dw but are inclined with respect to the height direction Dh.

[0150] In detail, for example Fig.15In the cross section in another direction as shown, the inclined wall surface 163j of the third side wall 163c is formed in such a way that the distance W3 in the width orthogonal direction Dwp from the power supply opening 14 to the inclined wall surface 163j increases continuously as it approaches the height direction Dh. Similarly, in the cross section in another direction, the inclined wall surface 163m of the fourth side wall 163d is also formed in such a way that the distance W4 in the width orthogonal direction Dwp from the power supply opening 14 to the inclined wall surface 163m increases continuously as it approaches the height direction Dh.

[0151] In the present embodiment, the inclined wall surfaces 163j and 163m are formed in the second block BC2, and the vertical wall surfaces 163i and 163k are formed in the third block BC3.

[0152] In addition, the shapes of the inclined wall surfaces 163j and 163m of the third and fourth side walls 163c and 163d of this embodiment are determined by the same method as the shape determination of the inclined wall surfaces 163f and 163h of the first and second side walls 163a and 163b of the first embodiment. That is, in this embodiment, the shapes of the inclined wall surfaces 163j and 163m of the third and fourth side walls 163c and 163d are determined by, for example, performing computer simulation so that the phases of the radio waves of a predetermined wavelength are aligned in all of the plurality of radiation openings 17.

[0153] In other words, in this embodiment, compared with the antenna device of the second comparative example described below, the shape of each inclined wall surface 163j, 163m is specified in such a manner that the phase deviation of the radio waves at the plurality of radiation openings 17 is reduced when the radio waves of a specified wavelength propagate from the power supply opening 14 to the chamber 15.

[0154] The antenna device of the second comparative example is different from the antenna device 1 of the present embodiment in that the antenna device 1 has a Fig.15 The cavity 15 is a shape indicated by the double-dashed lines LC3 and LC4 in the cross section in the other direction shown. That is, the antenna device of the second comparative example has the following structure: in the cross section in the other direction, the inclined wall surfaces 163j and 163m are not provided, and the distance in the width direction Dw from the power supply opening 14 to the side wall portion 163 is constant regardless of the position in the height direction Dh. Except for this structure, the antenna device of the second comparative example is the same as the antenna device 1 of the present embodiment.

[0155] In addition, in this embodiment, the chamber aggregate section 20 is also formed in a symmetrical shape as in the first embodiment. Fig.14 As shown, it is formed symmetrically with respect to the width direction Dw. In addition, Fig.15 The structure shown is also symmetrical with respect to the width orthogonal direction Dwp.

[0156] (1) As described above, according to this embodiment, in another direction (for example Fig.15 In the cross section of the embodiment of the present invention, the inclined wall surface 163j of the third side wall 163c is formed in such a manner that the distance W3 in the width orthogonal direction Dwp from the power supply opening 14 to the inclined wall surface 163j increases toward the side of the height direction Dh. In addition, in the cross section in another direction, the inclined wall surface 163m of the fourth side wall 163d is also formed in such a manner that the distance W4 in the width orthogonal direction Dwp from the power supply opening 14 to the inclined wall surface 163m increases toward the side of the height direction Dh. Furthermore, compared with the antenna device of the second comparative example described above, the shape of each inclined wall surface 163j, 163m is specified in such a manner that the phase deviation of the radio waves at the plurality of radiation openings 17 is reduced when the radio waves of a specified wavelength propagate from the power supply opening 14 to the cavity 15.

[0157] Therefore, the inclined wall surfaces 163j and 163m of the third and fourth side walls 163c and 163d can achieve the same effects as the inclined wall surfaces 163f and 163h of the first and second side walls 163a and 163b in the first embodiment. That is, there is an advantage that even if three or more radiation openings 17 are arranged in the width orthogonal direction Dwp, it is easy to align the phases of the radio waves at the radiation openings 17.

[0158] In addition, since it is easy to align the phases of radio waves at the plurality of radiation openings 17 and simultaneously increase the number of radiation openings 17 in the orthogonal width direction Dwp without limitation, it is possible to achieve a high gain of the antenna device 1 .

[0159] Except for the above-described contents, this embodiment is the same as the first embodiment. Also, in this embodiment, the effects obtained by the common structure with the first embodiment can be obtained in the same manner as the first embodiment described above.

[0160] (Variation of the Second Embodiment)

[0161] The antenna device 1 shown in the second embodiment can be modified as follows, for example. In addition, the multiple modified examples shown below are the same as the above-mentioned second embodiment in points other than the contents described below. In addition, as long as there are no special obstacles, the multiple modified examples shown below can also be applied to embodiments other than the second embodiment.

[0162] (First Modification)

[0163] In a second embodiment, if Fig.15As shown in FIG. 1 , the third side wall 163c and the fourth side wall 163d respectively have vertical wall surfaces 163i and 163k and inclined wall surfaces 163j and 163m facing the chamber 15, but this is an example. Fig.16 As shown, vertical wall surfaces 163i and 163k having a normal direction in the width-orthogonal direction Dwp are not provided, but inclined wall surfaces 163j and 163m as inclined surfaces extend over the entire range of the height direction Dh of the chamber 15.

[0164] (Second Modification)

[0165] like Fig.17 As shown, in this modification, unlike the second embodiment, the inclined wall surfaces 163j, 163m of the third and fourth side walls 163c, 163d are not limited to the second block BC2, but extend from the second block BC2 to the third block BC3. Furthermore, in this modification, unlike the second embodiment, each inclined wall surface 163j, 163m is not an inclined surface composed of a plane inclined relative to the height direction Dh.

[0166] Specifically, the inclined wall surfaces 163j and 163m of this modification are formed by stepped surfaces whose distances W3 and W4 in the direction Dwp perpendicular to the width of the power supply opening 14 change in a step-like manner. Fig.17 In the cross section, i.e., the cross section in another direction, the inclined wall surface 163j of the third side wall 163c is formed in such a way that the distance W3 in the width orthogonal direction Dwp from the power supply opening 14 to the inclined wall surface 163j increases stepwise as it approaches the height direction Dh. In addition, in the cross section in another direction, the inclined wall surface 163m of the fourth side wall 163d is also formed in such a way that the distance W4 in the width orthogonal direction Dwp from the power supply opening 14 to the inclined wall surface 163m increases stepwise as it approaches the height direction Dh.

[0167] In the case of this modification, as examples of the shape of the inclined wall surfaces 163j, 163m, the orientation of the surface of each part of the inclined wall surfaces 163j, 163m, the number of steps and the size of the inclined wall surfaces 163j, 163m formed by the step surface can be cited. In addition, as examples of the shape of the inclined wall surfaces 163j, 163m, the change ratio of the distance W3, W4 in the width orthogonal direction Dwp from the power supply opening 14 to the inclined wall surfaces 163j, 163m relative to the position change in the height direction Dh can also be cited.

[0168] In the present modification, the stepped inclined wall surfaces 163j and 163m extend to both the second block BC2 and the third block BC3, but may be formed only in one of the second block BC2 and the third block BC3 and not in the other.

[0169] (Third Modification)

[0170] like Fig.18 As shown, in this modification, similarly to the second modification, the inclined wall surfaces 163j and 163m of the third and fourth side walls 163c and 163d are formed by stepped surfaces whose distances W3 and W4 in the direction Dwp perpendicular to the width of the power supply opening 14 change in a step-like manner. However, in this modification, the number of steps of the inclined wall surfaces 163j and 163m formed as stepped surfaces is greater than that of the second modification. That is, the number of steps of the inclined wall surfaces 163j and 163m can also be any number of steps.

[0171] (Third Embodiment)

[0172] Next, a third embodiment will be described.

[0173] like Fig.19 As shown, this embodiment is an embodiment obtained by combining the first modification of the first embodiment and the first modification of the second embodiment. Fig.19 The Xa-Xa section becomes Fig.10 That way, Fig.19 The XVIa-XVIa section becomes Fig.16 Like that.

[0174] In addition, in the present embodiment, the height direction Dh corresponds to the first direction of the present disclosure, the width direction Dw corresponds to the second direction of the present disclosure, and the width-orthogonal direction Dwp corresponds to the third direction of the present disclosure. In addition, in the present embodiment, the inclined wall surfaces 163f and 163h of the first and second side walls 163a and 163b correspond to the second direction change surface of the present disclosure, and the inclined wall surfaces 163j and 163m of the third and fourth side walls 163c and 163d correspond to the third direction change surface of the present disclosure. In addition, the cross-section along the height direction Dh and the width direction Dw, i.e., the cross-section in one direction (e.g. Fig.10 The cross section) corresponds to the first cross section of the present disclosure, and the cross section along the height direction Dh and the width orthogonal direction Dwp, that is, the cross section in another direction (for example Fig.16 The cross section) corresponds to the second cross section of the present disclosure.

[0175] Specifically, in the present embodiment, the radiation openings 17 are arranged in a 3×3 grid pattern, and a total of nine radiation openings 17 are provided. That is, three radiation openings 17 are arranged at equal intervals in the width direction Dw and three radiation openings 17 are arranged at equal intervals in the widthwise orthogonal direction Dwp.

[0176] like Fig.10 As shown, the first side wall 163a of this embodiment has an inclined wall surface 163f similarly to the first modified example of the first embodiment, and the second side wall 163b of this embodiment has an inclined wall surface 163h similarly to the first modified example of the first embodiment. Fig.16 As shown, the third side wall 163c of this embodiment has an inclined wall surface 163j similarly to the first modification example of the second embodiment, and the fourth side wall 163d of this embodiment has an inclined wall surface 163m similarly to the first modification example of the second embodiment.

[0177] Therefore, in the present embodiment, the shapes of the inclined wall surfaces 163f and 163h of the first and second side walls 163a and 163b are determined in the same manner as in the first variant of the first embodiment. Furthermore, the shapes of the inclined wall surfaces 163j and 163m of the third and fourth side walls 163c and 163d are determined in the same manner as in the first variant of the second embodiment. That is, in the present embodiment, the shapes of the inclined wall surfaces 163f, 163h, 163j, and 163m of the cavity forming portion 16 are determined in such a manner that the phase of the radio wave of a predetermined wavelength is aligned in all of the plurality of radiation openings 17 when the radio wave propagates from the power supply opening 14 to the cavity 15. For example, in the present embodiment, the shapes of the inclined wall surfaces 163f, 163h, 163j, and 163m are determined by computer simulation in the same manner as in the first variant of the first embodiment and the first variant of the second embodiment.

[0178] According to the above content, the effects of the inclined wall surfaces 163f and 163h of the first and second side walls 163a and 163b in the first variant of the first embodiment and the effects of the inclined wall surfaces 163j and 163m of the third and fourth side walls 163c and 163d in the first variant of the second embodiment can be enjoyed at the same time. As a result, it is easy to align the phases of the radio waves at the plurality of radiation openings 17 and simultaneously increase the radiation openings 17 without restriction in both the width direction Dw and the width-orthogonal direction Dwp, thereby achieving a high gain of the antenna device 1.

[0179] Furthermore, since a plurality of radiation openings 17 can be arranged two-dimensionally in the width direction Dw and the width-orthogonal direction Dwp, it is easier to significantly achieve high gain while suppressing an increase in the size of the antenna device 1 compared to a case where three or more directions for arranging the radiation openings 17 are limited to a single direction.

[0180] Except for the contents described above, this embodiment is the same as the first variant of the first embodiment or the first variant of the second embodiment. In this embodiment, the effect of the structure common to the first variant of the first embodiment can be obtained in the same manner as the first variant of the first embodiment described above. In addition, in this embodiment, the effect of the structure common to the first variant of the second embodiment can be obtained in the same manner as the first variant of the second embodiment described above.

[0181] (Fourth Embodiment)

[0182] Next, a fourth embodiment will be described. In this embodiment, points different from the third embodiment described above will be mainly described.

[0183] like Fig. 20 As shown, in this embodiment, the arrangement of the plurality of radiation openings 17 is different from that in the third embodiment. In this embodiment, at most three radiation openings 17 are arranged in the width direction Dw, and at most four radiation openings 17 are arranged in the width-orthogonal direction Dwp.

[0184] In addition, in the cross section parallel to the width direction Dw and the width-orthogonal direction Dwp, the side wall portion 163 of the present embodiment is formed in a circular ring shape or an elliptical shape. Moreover, the side wall portion 163 is formed in a manner that the diameter increases as it approaches the height direction Dh. Therefore, the inclined wall surfaces 163f, 163h, 163j, and 163m of the side wall portion 163 are all concavely curved in a plan view, and are connected to each other continuously without being bent.

[0185] Except for the above-described contents, this embodiment is the same as the third embodiment. Also, in this embodiment, similarly to the third embodiment described above, the effects obtained by the configuration common to the third embodiment can be obtained.

[0186] In addition, although this embodiment is an embodiment created based on the third embodiment, this embodiment may be combined with the above-mentioned first embodiment or second embodiment.

[0187] (Fifth Embodiment)

[0188] Next, a fifth embodiment will be described. In this embodiment, points different from the first embodiment described above will be mainly described.

[0189] like Fig.21 As shown, the antenna device 1 of this embodiment does not have Figure 5 The third block BC3 shown in the figure has a plate PL instead. That is, the antenna device 1 is a structure ST having a stacked structure formed by stacking two conductive blocks BC1 and BC2 and a conductive plate PL.

[0190] The two blocks BC1 and BC2 are composed of metal blocks. The plate PL is composed of a metal plate. In addition, at least one of the two blocks BC1 and BC2 and the plate PL may be composed of a member formed by forming a conductive film such as a metal film on the surface of a resin member by plating or the like, or a conductive member formed by a conductive material other than metal.

[0191] In the antenna device 1 , the two blocks BC1 and BC2 and the plate PL are coupled to each other by screwing, bonding, or the like.

[0192] The two blocks BC1, BC2 and the plate PL are formed into the same rectangular shape when viewed from above. In addition, the two blocks BC1, BC2 and the plate PL are formed into the same size when viewed from above so as to overlap each other in the height direction Dh. The two blocks BC1, BC2 and the plate PL are electrically connected by overlapping each other.

[0193] The waveguide section 12 of this embodiment is formed by the first groove 121 formed in the first block BC1 and a flat portion of the second block BC2 facing the first groove 121. The second block BC2 of this embodiment does not have the second groove 122 described in the first embodiment.

[0194] The reflection suppression wall 13 is composed of a first protruding wall 131 protruding toward one side in the height direction Dh from the bottom surface of the first groove portion 121. In addition, in this embodiment, the second protruding wall 132 described in the first embodiment is not provided.

[0195] The cavity 15 of this embodiment is formed by combining the first recess 151 formed in the second block BC2 and the portion of the plate PL that is opposite to the first recess 151. In this embodiment, the portion of the second block BC2 and the plate PL that forms the cavity 15 constitutes the cavity forming portion 16. In addition, the power supply opening 14 is provided at a portion of the bottom surface of the first recess 151 of the second block BC2 that is opposite to the first groove portion 121.

[0196] In addition, in this embodiment, similarly to the first modified example of the first embodiment described above, the vertical wall surfaces 163e and 163g (see Figure 3 ), the inclined wall surfaces 163f and 163h extend over the entire range of the height direction Dh of the chamber 15.

[0197] Except for the above-described contents, this embodiment is the same as the first embodiment. Also, in this embodiment, similarly to the first embodiment described above, the effects obtained by the configuration common to the first embodiment can be obtained.

[0198] In addition, although this embodiment is an embodiment created based on the first embodiment, this embodiment may be combined with any of the second to fourth embodiments described above.

[0199] (Sixth Embodiment)

[0200] Next, a sixth embodiment will be described. In this embodiment, points different from the first embodiment described above will be mainly described.

[0201] like Figure 22 to Figure 24 As shown, the antenna device 1 of this embodiment includes a plurality of first partition walls 23 provided in the third block BC3 and a plurality of second partition walls 24 provided in the second block BC2. The plurality of first partition walls 23 of this embodiment corresponds to the second direction partition wall of the present disclosure.

[0202] A plurality of first partition walls 23 and a plurality of second partition walls 24 are disposed in the chamber 15. Fig.23 , Fig.24 As shown, the plurality of first partition walls 23 are respectively arranged according to the positions between the adjacent radiation openings 17 in the width direction Dw when viewed from above among the plurality of radiation openings 17. In addition, the plurality of first partition walls 23 are respectively formed in a manner of protruding from the opposing wall portion 162 of the chamber forming portion 16 into the chamber 15, and are arranged over the entire range of the chamber 15 in the width orthogonal direction Dwp. The plurality of first partition walls 23 each have a front end 231 on the other side of the height direction Dh.

[0203] In contrast, the plurality of second partition walls 24 are formed and arranged in the chamber 15 in a manner opposite to the plurality of first partition walls 23 in the height direction Dh. Specifically, the plurality of second partition walls 24 are respectively arranged according to the positions between the radiation openings 17 adjacent to each other in the width direction Dw when viewed from above among the plurality of radiation openings 17. In short, the plurality of second partition walls 24 are respectively arranged at the same positions as the plurality of first partition walls 23 when viewed from above. Furthermore, the plurality of second partition walls 24 are respectively formed in a manner protruding from the opening wall portion 161 of the chamber forming portion 16 into the chamber 15, and are arranged over the entire range of the chamber 15 in the width orthogonal direction Dwp. The plurality of second partition walls 24 each have a front end 241 on one side in the height direction Dh.

[0204] By providing the plurality of first partition walls 23 and the plurality of second partition walls 24 in this manner, a plurality of partition spaces 15a arranged in the width direction Dw with the first partition walls 23 and the second partition walls 24 interposed therebetween are formed in the chamber 15. Also, the plurality of first partition walls 23 and the plurality of second partition walls 24 are formed symmetrically with respect to the width direction Dw and are also formed symmetrically with respect to the width orthogonal direction Dwp, similarly to the chamber collection portion 20.

[0205] In addition, the front end 231 of the first partition wall 23 and the front end 241 of the second partition wall 24 are separated in the height direction Dh. Therefore, the connecting portion 15b that connects the adjacent divided spaces 15a to each other across the first partition wall 23 and the second partition wall 24 arranged in a pair in the height direction Dh is also formed in the chamber 15. The connecting portion 15b is formed on the other side of the chamber 15 in the height direction Dh relative to the front end 231 of the first partition wall 23 and on one side in the height direction Dh relative to the front end 241 of the second partition wall 24. In short, the connecting portion 15b is formed between the front end 231 of the first partition wall 23 and the front end 241 of the second partition wall 24 in the height direction Dh.

[0206] In addition, the protrusion height of the second partition wall 24 to the chamber 15 is lower than the protrusion height of the first partition wall 23 to the chamber 15. For example, the protrusion height of the second partition wall 24 is half or less than the depth of the first recess 151. Therefore, any communication portion 15b is arranged in the chamber 15 at the other side of the height direction Dh.

[0207] (1) As described above, according to the present embodiment, the plurality of first partition walls 23 protruding from the opposing wall portion 162 into the chamber 15 are respectively provided at positions between the plurality of radiation openings 17 adjacent to each other in the width direction Dw. Furthermore, the connecting portion 15b connecting the adjacent divided spaces 15a in the chamber 15 across the first partition wall 23 is formed on the other side of the chamber 15 in the height direction Dh relative to the front end 231 of the first partition wall 23.

[0208] Thus, the first partition wall 23 can ensure isolation in the width direction Dw between the plurality of radiation openings 17 , and thus the accuracy of phase matching of radio waves at the radiation openings 17 can be improved.

[0209] (2) In addition, according to the present embodiment, any of the connecting portions 15b is disposed on the other side of the height direction Dh in the chamber 15. This can avoid the situation where the propagation of radio waves between each of the plurality of radiation openings 17 and the power supply opening 14 is excessively hindered by the first partition wall 23, and at the same time, it is easy to ensure isolation between the plurality of radiation openings 17 in the width direction Dw.

[0210] Except for the above-described contents, this embodiment is the same as the first embodiment. Also, in this embodiment, similarly to the first embodiment described above, the effects obtained by the configuration common to the first embodiment can be obtained.

[0211] In addition, this embodiment is an embodiment created based on the first embodiment, and this embodiment may be combined with any of the second to fifth embodiments described above.

[0212] (Seventh Embodiment)

[0213] Next, a seventh embodiment will be described. In this embodiment, points different from the sixth embodiment described above will be mainly described.

[0214] like Fig.25 , Fig.26 As shown, the antenna device 1 of this embodiment has a third dividing wall 25 provided on the third block BC3 in addition to the plurality of first dividing walls 23 and the plurality of second dividing walls 24 that are the same as those in the sixth embodiment. In addition, the plurality of first dividing walls 23 of this embodiment correspond to the second direction dividing walls of the present disclosure in the same manner as in the sixth embodiment. In addition, the third dividing wall 25 of this embodiment corresponds to the third direction dividing wall of the present disclosure.

[0215] The third partition wall 25 is disposed in the chamber 15. The third partition wall 25 is disposed between adjacent radiation openings 17 in the width orthogonal direction Dwp when viewed from above among the plurality of radiation openings 17. The third partition wall 25 is formed so as to protrude from the opposing wall portion 162 of the chamber forming portion 16 into the chamber 15, and is disposed over the entire range of the chamber 15 in the width direction Dw. The third partition wall 25 has a front end 251 on the other side in the height direction Dh.

[0216] Since the third partition wall 25 is formed in a manner orthogonal to the plurality of first partition walls 23, the third partition wall 25 and the plurality of first partition walls 23 are formed in a lattice shape as a whole. In addition, in the present embodiment, the plurality of divided spaces 15a divided by the first to third partition walls 23, 24, and 25 are formed in the same number as the radiation openings 17, and are arranged one-to-one with respect to the radiation openings 17. That is, the plurality of divided spaces 15a are arranged in three in the width direction Dw and two in the width-orthogonal direction Dwp, forming a 3×2 lattice configuration.

[0217] For example, the protrusion height of the third partition wall 25 into the chamber 15 is the same as the protrusion height of the first partition wall 23 into the chamber 15. That is, in the height direction Dh, the position of the front end 251 of the third partition wall 25 is the same as the position of the front end 231 of the first partition wall 23.

[0218] Therefore, a connecting portion 15c is also formed on the other side of the height direction Dh opposite to the front end 251 of the third partition wall 25 in the chamber 15. The connecting portion 15c is connected to the front end 251 of the third partition wall 25, and connects the adjacent partition spaces 15a separated by the third partition wall 25. The connecting portion 15c connected to the front end 251 of the third partition wall 25 is also arranged on the other side of the height direction Dh in the chamber 15, similarly to the connecting portion 15b connected to the front end 231 of the first partition wall 23.

[0219] In addition, similar to the chamber aggregate 20 , the plurality of first partition walls 23 , the plurality of second partition walls 24 , and the third partition wall 25 are formed symmetrically with respect to the width direction Dw and are also formed symmetrically with respect to the widthwise orthogonal direction Dwp.

[0220] (1) As described above, according to the present embodiment, the third partition wall 25 protruding from the opposing wall portion 162 into the chamber 15 is provided between the radiation openings 17 adjacent to each other in the width-orthogonal direction Dwp among the plurality of radiation openings 17. Furthermore, the connecting portion 15c connecting the adjacent divided spaces 15a in the chamber 15 across the third partition wall 25 is formed on the other side of the chamber 15 in the height direction Dh relative to the front end 251 of the third partition wall 25.

[0221] Thus, the third partition wall 25 can ensure isolation between the plurality of radiation openings 17 in the width-orthogonal direction Dwp, thereby improving the accuracy of phase matching of radio waves at the radiation openings 17. Furthermore, the first partition wall 23 and the third partition wall 25 can also ensure isolation between the radiation openings 17.

[0222] Except for the above-described contents, this embodiment is the same as the sixth embodiment. Also, in this embodiment, similarly to the sixth embodiment, the effects obtained by the configuration common to the sixth embodiment can be obtained.

[0223] (Eighth Embodiment)

[0224] Next, an eighth embodiment will be described. In this embodiment, points different from the first embodiment described above will be mainly described.

[0225] like Fig. 27 As shown, in this embodiment, the input / output unit 3 (see Figure 2 ), a connection wiring 41 and an input / output circuit 42 are provided on the electrical substrate 4.

[0226] The connection wiring 41 and the input / output circuit 42 are constituted by a wiring pattern having conductivity formed on one surface F1 of the electric substrate 4 .

[0227] The connection wiring 41 is formed so as to be led out from the MMIC 2 along the one surface F1 of the electric board 4. One end side of the connection wiring 41 is electrically connected to the terminal of the MMIC 2, and the other end side is electrically connected to the input-output circuit 42.

[0228] The input / output circuit 42 transmits and receives radio waves to and from the external port 11 of the antenna device 1. The input / output circuit 42 functions in the same manner as the input / output unit 3 of the MMIC 2 described in the first embodiment.

[0229] The external port 11 of this embodiment is arranged to face the input / output circuit 42. Thus, radio waves can propagate between the external port 11 and the input / output circuit 42. In addition, in this embodiment, compared with the first embodiment, the antenna device 1 is arranged closer to the electrical substrate 4 in the height direction Dh, and a groove portion RG recessed toward one side in the height direction Dh is formed in the first block BC1. The MMIC 2 partially enters the groove portion RG.

[0230] Except for the above-described contents, this embodiment is the same as the first embodiment. Also, in this embodiment, similarly to the first embodiment described above, the effects obtained by the configuration common to the first embodiment can be obtained.

[0231] In addition, this embodiment is an embodiment created based on the first embodiment, but this embodiment may be combined with any of the second to seventh embodiments described above.

[0232] (Ninth Embodiment)

[0233] Next, a ninth embodiment will be described. In this embodiment, points different from the eighth embodiment described above will be mainly described.

[0234] like Fig.28 As shown, the MMIC 2 is not mounted on one surface F1 of the electric board 4 but is mounted on the other surface F2 of the electric board 4. In addition, the groove portion RG described in the eighth embodiment is not formed in the first block BC1.

[0235] In addition, in the electrical substrate 4, an input-output circuit 42 is formed on one surface F1, and a connection wiring 41 is formed on the other surface F2. In addition, a connection portion 43 is provided on the electrical substrate 4 to penetrate the electrical substrate 4 and electrically connect the connection wiring 41 and the input-output circuit 42. The connection portion 43 is composed of, for example, a through hole. The input-output circuit 42 and the connection wiring 41 are electrically connected via the connection portion 43.

[0236] Except for the above-described contents, this embodiment is the same as the eighth embodiment. Also, in this embodiment, similarly to the eighth embodiment described above, the effects obtained by the configuration common to the eighth embodiment can be obtained.

[0237] (Tenth Embodiment)

[0238] Next, a tenth embodiment will be described. In this embodiment, points different from the above-mentioned first embodiment will be mainly described.

[0239] like Fig.29 As shown, in this embodiment, the spacer 5 described in the first embodiment is not provided (see Figure 2 The antenna device 1 of the present embodiment is arranged such that the first block BC1 is in contact with the one surface F1 of the electric board 4 without the spacer 5 interposed therebetween. Furthermore, the MMIC 2 is mounted on the other surface F2 of the electric board 4 .

[0240] In addition, a substrate through hole SH penetrating the electrical substrate 4 along the height direction Dh is formed at a position of the electrical substrate 4 that faces the input / output portion 3 of the MMIC 2. Furthermore, the external port 11 is arranged so as to face the input / output portion 3 of the MMIC 2 with the substrate through hole SH therebetween. With such an arrangement, radio waves can propagate between the external port 11 and the MMIC 2.

[0241] Except for the above-described contents, this embodiment is the same as the first embodiment. Also, in this embodiment, similarly to the first embodiment described above, the effects obtained by the configuration common to the first embodiment can be obtained.

[0242] In addition, this embodiment is an embodiment created based on the first embodiment, but this embodiment may be combined with any of the second to seventh embodiments described above.

[0243] (Eleventh Embodiment)

[0244] Next, an eleventh embodiment will be described. In this embodiment, points different from the above-mentioned ninth embodiment will be mainly described.

[0245] like Fig.30 As shown, in this embodiment, the spacer 5 described in the first embodiment is not provided (see Fig.28 The antenna device 1 of the present embodiment is arranged such that the first block BC1 is in contact with the one surface F1 of the electric board 4 without the spacer 5 interposed therebetween. Furthermore, the MMIC 2 is mounted on the other surface F2 of the electric board 4 .

[0246] In addition, an input-output circuit 42 is formed on one surface F1 of the electric substrate 4, and a connection wiring 41 is formed on the other surface F2 of the electric substrate 4. In addition, the electric substrate 4 is provided with a connection portion 43 that penetrates the electric substrate 4 and electrically connects the connection wiring 41 and the input-output circuit 42. The connection portion 43 is composed of, for example, a through hole. The input-output circuit 42 and the connection wiring 41 are electrically connected via the connection portion 43.

[0247] Except for the above-described contents, this embodiment is the same as the ninth embodiment. Also, in this embodiment, similarly to the ninth embodiment described above, the effects obtained by the configuration common to the ninth embodiment can be obtained.

[0248] (Twelfth Embodiment)

[0249] Next, a twelfth embodiment will be described. In this embodiment, points different from the above-mentioned first embodiment will be mainly described.

[0250] like Fig.31 As shown, a structure for transmitting radio waves transmitted and received by MMIC 2 can be realized by using an array antenna AR formed by arraying a plurality of antenna devices 1. Such an array antenna AR can be realized, for example, by converging the MMIC2 side of the waveguide paths 12a in the plurality of antenna devices 1 so that radio waves can be transmitted between each of the waveguide paths 12a of the antenna device 1 and the MMIC2.

[0251] As described in the above-mentioned embodiment, the antenna device 1 of the present embodiment can be configured in a small size, and therefore, a small array antenna AR can be realized by configuring the array antenna AR using a plurality of the antenna devices 1. In addition, since the input / output unit 3 of the MMIC 2 is connected to the plurality of radiation openings 17, the gain of the array antenna AR can be increased.

[0252] Except for the above-described contents, this embodiment is the same as the first embodiment. Also, in this embodiment, similarly to the first embodiment described above, the effects obtained by the configuration common to the first embodiment can be obtained.

[0253] In addition, although this embodiment is an embodiment created based on the first embodiment, this embodiment may be combined with any one of the second to eleventh embodiments described above.

[0254] (Other Embodiments)

[0255] (1) In each of the above-mentioned embodiments, for example Figure 1 As shown, the channel extension direction Da of the waveguide channel 12a coincides with the width direction Dw, but the present invention is not limited thereto, and it is also conceivable that the channel extension direction Da is slightly inclined relative to the width direction Dw.

[0256] (2) In the first embodiment described above, Figure 3 , Figure 6 As shown in the figure, three radiation openings 17 are arranged in the width direction Dw, but four or more radiation openings may be arranged in the width direction Dw.

[0257] This is also true for the second and third embodiments described above. That is, in the second embodiment, Fig.13 As shown in FIG. 1 , three radiation openings 17 are arranged in the width orthogonal direction Dwp, but four or more radiation openings 17 may be arranged in the width orthogonal direction Dwp. Fig.19 As shown in the figure, three radiation openings 17 are arranged in each of the width direction Dw and the direction perpendicular to the width Dwp, but four or more radiation openings may be arranged in each of the width direction Dw and the direction perpendicular to the width Dwp.

[0258] (3) In the first embodiment described above, if Figure 3 , Figure 5 As shown in FIG. 1 , the inclined wall surfaces 163f and 163h of the first and second side walls 163a and 163b are formed by planes, but this is an example. Figure 3 The curved surface in the cross section is composed of curved surfaces.

[0259] Similarly, in the above-mentioned second embodiment, if Fig.15 As shown in FIG. 1 , the inclined wall surfaces 163j and 163m of the third and fourth side walls 163c and 163d are formed by planes, but this is an example. Fig.15 The curved surface in the cross section is composed of curved surfaces.

[0260] (4) In each of the above embodiments, for example Figure 3 As shown in FIG. 1 , the waveguide portion 12 has a reflection suppression wall 13. Although this is desirable, the reflection suppression wall 13 is not necessarily a necessary structure. For example, the antenna device 1 may be a structure in which the reflection suppression wall 13 is omitted or only one of the pair of protruding walls 131 and 132 constituting the reflection suppression wall 13 is omitted. In addition, the pair of protruding walls 131 and 132 may have the same shape as each other or different shapes from each other.

[0261] Furthermore, the reflection suppression wall 13 may be formed so as to locally narrow the waveguide path 12a in the orthogonal width direction Dwp instead of locally narrowing the waveguide path 12a in the height direction Dh.

[0262] (5) In the sixth and seventh embodiments described above, for example Fig.23As shown, a plurality of second partition walls 24 are provided, but it is also conceivable that the plurality of second partition walls 24 are not provided.

[0263] (6) In the seventh embodiment described above, if Fig.26 As shown, the plurality of radiation openings 17 are arranged in two in the width orthogonal direction Dwp, but for example Fig.19 In this case, a plurality of third partition walls 25 are provided. Furthermore, the plurality of third partition walls 25 are provided at positions between adjacent radiation openings 17 in the widthwise perpendicular direction Dwp when viewed from above.

[0264] (7) In the seventh embodiment described above, in addition to the third partition wall 25, the plurality of first partition walls 23 and the plurality of second partition walls 24 are provided. However, it is conceivable that the plurality of first partition walls 23 and the plurality of second partition walls 24 are not provided.

[0265] (8) In each of the above-described embodiments, the chamber aggregate 20 is formed symmetrically with respect to the width direction Dw and also symmetrically with respect to the width-orthogonal direction Dwp. Although this is desirable, it does not necessarily have to be this way.

[0266] (9) In the first embodiment and the like, the waveguide 12a extends linearly, but the waveguide 12a may extend partially curved. In such a waveguide 12a, the waveguide extending direction Da is defined as the tangent direction of the central axis of the waveguide 12a.

[0267] (10) The antenna device 1 of each of the above-described embodiments is constituted by a structure ST in which three blocks BC1 , BC2 , and BC3 are stacked in the height direction Dh. However, the antenna device 1 may not be constituted by a structure ST having such a stacked structure.

[0268] (11) The MMIC 2 of the above embodiment transmits and receives radio waves, but this is an example, and the antenna device 1 may only transmit or receive radio waves. The antenna device 1 may also be applied to equipment that transmits and receives radio waves using semiconductor devices other than the MMIC 2.

[0269] (12) In each of the spaces formed in the antenna device 1 of the above-described embodiments, such as the external port 11, the waveguide 12a, the power supply opening 14, the cavity 15, and the radiation opening 17, the corners R may or may not be formed. This has no substantial effect on the characteristics of the antenna device 1.

[0270] (13) In addition, the present disclosure is not limited to the above-mentioned embodiments, and can be implemented in various modified forms. In addition, the above-mentioned embodiments are not mutually unrelated embodiments, and can be appropriately combined except for cases where they are obviously not combined.

[0271] In addition, in the above-mentioned embodiments, the elements constituting the embodiments are not necessarily necessary elements, except for the cases where they are specifically stated to be necessary and the cases where they are obviously necessary in principle. In addition, in the above-mentioned embodiments, when referring to the number, value, amount, range, and other numerical values ​​of the constituent elements of the embodiments, they are not limited to the specific numbers, except for the cases where they are specifically stated to be necessary and the cases where they are obviously limited to specific numbers in principle. In addition, in the above-mentioned embodiments, when referring to the materials, shapes, positional relationships, etc. of the constituent elements, etc., they are not limited to the materials, shapes, positional relationships, etc., except for the cases where they are specifically stated to be necessary and the cases where they are obviously limited to specific materials, shapes, positional relationships, etc. in principle.

Claims

1. An antenna device, characterized in that: have: a waveguide portion having a waveguide path formed therein for propagating radio waves; and a cavity forming portion that forms a cavity inside, the cavity being arranged on one side of the waveguide tube in the first direction and communicating with the waveguide tube via a power supply opening, The chamber forming portion comprises: an opening wall portion facing the chamber from the other side opposite to the one side in the first direction and having the power supply opening formed therein; an opposing wall portion facing the chamber from the one side in the first direction and having a plurality of radiation openings formed therein and opposing the opening wall portion; and a side wall portion between the opening wall portion and the opposing wall portion, surrounding the chamber, facing the chamber and connecting the opening wall portion and the opposing wall portion, The plurality of radiation openings connect the chamber with an external space to propagate the radio waves between the chamber and the external space, and three or more of the plurality of radiation openings are arranged in a second direction perpendicular to the first direction. In a first cross-section along the first direction and the second direction, the side wall portion has a second direction-changing surface on one side and the other side of the second direction relative to the power supply opening, respectively, the second direction-changing surface faces the chamber and is formed in such a manner that the closer to the one side in the first direction, the greater the distance from the power supply opening in the second direction. The shape of the second direction change surface is defined so that, compared with a case where the second direction change surface is not provided in the first section and the distance in the second direction from the power supply opening to the side wall portion is fixed regardless of the position in the first direction, the phase deviation of the radio waves at the plurality of radiation openings is reduced when the radio waves of a specified wavelength propagate from the power supply opening to the chamber.

2. The antenna device according to claim 1, characterized in that The plurality of radiation openings are also arranged in a third direction perpendicular to both the first direction and the second direction, and three or more of the plurality of radiation openings are arranged in a third direction perpendicular to both the first direction and the second direction. In a second cross-section along the first direction and the third direction, the side wall portion has a third direction changing surface on one side and the other side of the third direction relative to the power supply opening, respectively, the third direction changing surface faces the chamber and is formed in such a manner that the closer to the one side in the first direction, the greater the distance from the power supply opening in the third direction. The shape of the third directional change surface is defined so that, compared with a case where the third directional change surface is not provided in the second section and the distance in the third direction from the power supply opening to the side wall portion is fixed regardless of the position in the first direction, the phase deviation of the radio waves at the plurality of radiation openings is reduced when the radio waves of the specified wavelength propagate from the power supply opening to the chamber.

3. The antenna device according to claim 1 or 2, characterized in that: The power supply opening is provided so as to overlap with the center position of the cavity at the other side in the first direction relative to the center position of the cavity.

4. The antenna device according to claim 1 or 2, characterized in that: The chamber, the power supply opening and the plurality of radiation openings constitute a chamber collection portion. The chamber aggregate is formed symmetrically with respect to the second direction, and is also formed symmetrically with respect to a third direction perpendicular to both the first direction and the second direction.

5. The antenna device according to claim 1 or 2, characterized in that: The waveguide line extends along the line extension direction. The waveguide section has a short-circuit wall which is disposed at a position closer to the side of the waveguide extension direction than the opening position of the power supply opening relative to the waveguide opening and constitutes an end of the waveguide; and a reflection suppression wall provided at a position closer to the other side of the pipe extending direction than the opening position, for suppressing reflection of the radio wave.

6. The antenna device according to claim 1, characterized in that: The antenna device includes a plurality of second direction partition walls, which are respectively disposed at positions between the radiation openings adjacent to each other in the second direction among the plurality of radiation openings and protrude from the opposing wall portion into the chamber. The plurality of second direction dividing walls have a front end on the other side of the first direction, A communication portion connecting adjacent divided spaces in the chamber across the second-direction partitioning wall is formed on the other side of the first direction relative to the front end of the second-direction partitioning wall in the chamber.

7. The antenna device according to claim 1, characterized in that: The plurality of radiation openings are arranged in a third direction perpendicular to both the first direction and the second direction, and two or more of them are arranged in a row. The antenna device includes one or more third-direction partition walls, each of which is disposed at a position between the radiation openings adjacent to each other in the third direction among the plurality of radiation openings and protrudes from the opposing wall portion into the chamber. The third direction dividing wall has a front end on the other side of the first direction, A communication portion connecting adjacent divided spaces in the chamber across the third-direction partition wall is formed on the other side of the first direction relative to the front end of the third-direction partition wall in the chamber.

8. The antenna device according to claim 6 or 7, characterized in that: The communication portion is disposed in the chamber close to the other side in the first direction.

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