JP5669043B2 - Post-wall waveguide antenna and antenna module - Google Patents

Description

  The present invention relates to a post wall waveguide antenna and an antenna module having the same.

  As content increases, expectations for high-speed and large-capacity wireless communication using millimeter waves are increasing (Non-Patent Document 1), and one of the usage models is short-distance high-speed in the 60 GHz band using mobile terminals. File transfer has been proposed (for example, Non-Patent Document 4 [FIG. 1], etc.). This model is characterized in that the terminal is used for communication, and in such a case, the antenna mounted on the board is required to output a beam parallel to the board.

  Such a model requires a waveguide antenna such as a horn antenna. However, since the conventional waveguide is a metal three-dimensional structure, the weight is increased, and it is difficult to use it for a portable device.

  On the other hand, a technique called a post (column) wall waveguide has been proposed (Non-Patent Documents 2 and 3).

  Such a post-wall waveguide is made up of a plurality of metal columns (conductor posts) that are electrically connected to the upper and lower conductors (copper foil) of a printed circuit board (PCB) by means of metal-plated through holes. A conductive wall called a post (column) wall is formed to simulate a narrow wall of a rectangular waveguide.

  The metal pillar can be processed using a printed circuit board processing technique called a through hole or a via hole.

  The present inventors previously proposed a post (pillar) wall waveguide aperture antenna that can be integrated into a planar mounting package having an antenna aperture on the side of the substrate (Non-Patent Document 4), and further system requirements (gain 6 dBi, 3 dB). An antenna satisfying a beam width of 40 to 60 ° has been proposed and realized (Patent Document 1, Non-Patent Document 5).

  FIG. 1 is a conceptual perspective view of a waveguide antenna previously proposed by the present inventors. It is shown in a perspective shape for easy understanding. FIG. 2 is a top view of FIG. 1 and is shown in a transparent manner for easy understanding.

  A plurality of conductor posts (metal pillars) 2 are provided on the dielectric block 1 to form both-side post walls 2A and 2B and a rear post wall 2C of the waveguide (see FIG. 2). Further, conductor foils (for example, copper foils) 3A and 3B are formed to be electrically connected to the upper and lower end faces of the plurality of conductor posts 2, respectively. Thereby, a waveguide-type post wall waveguide is formed as the waveguide.

  A conversion portion into which the quasi-coaxial center conductor 4 is inserted is formed on the rear side of the post wall waveguide. As a result, a millimeter wave (or microwave) signal supplied from a circuit (not shown) to the pad 40 is introduced into the central conductor 4 through the strip line 41, and converted into a waveguide mode by the conversion unit to be a post wall waveguide. And is radiated as an electromagnetic wave in the direction of the arrow from the opening 5.

  Here, conductor posts 21 </ b> A (21 </ b> B) are provided at left and right positions facing the inside of the opening 5. This is to obtain a matching circuit by adjusting the wide wall width of the waveguide like an iris used in a normal waveguide and realizing a parallel inductance. Thereby, matching with the spatial impedance outside the opening 5 can be achieved.

  A plurality of conductor posts 22A (22B) are provided at the left and right positions toward the outside of the opening 5. The conductor post 22A (22B) functions as a reflector.

  An antenna module is formed by integrating the post wall waveguide having the structure shown in FIGS. 1 and 2 with the circuit element.

  FIG. 3 is a diagram illustrating the entire antenna module, and is a schematic top view of the antenna module configuration.

  A post wall and a wiring layer by the conductor post 2 of the post wall waveguide antenna portion 20 surrounded by a circle are formed in a multilayer block body 10 in which a dielectric material such as a glass cloth base epoxy resin is multilayered. An IC chip 6 constituting a circuit element is mounted on the multilayer block body 10 by flip mounting or wire bonding. The IC chip 6 and the central conductor 4 of the power feeding unit are connected by a microstrip line 41.

  Here, when an antenna module is applied to a wireless device, many have a configuration having a transmission / reception function.

  FIG. 4 is a block diagram of an example of an RF unit of an antenna module having a transmission / reception function, and is a diagram for examining the signal level of each unit during reception.

  In FIG. 4, assuming that the transmission output is 3 dBm, the antenna gain is 6 dB, and the distance between transmission and reception is 1 m in the frequency band of 59 to 66 GHz, the input of the low noise amplifier (LNA) is caused by a spatial loss of −68 dB. The signal level is −53 dBm. The input signal is affected by noise (−40 dBm) due to local signal leakage through the transmission amplifier (PA). Furthermore, if the reception noise figure NF is 10 dB and the carrier noise ratio (CNR) of the IF stage is finally 10 dB, the isolation level between transmission and reception needs to be 30 dB or less.

  FIG. 5 shows a plan view of an antenna module corresponding to such a block diagram. A transmitting antenna 30A and a receiving antenna 30B are mounted on the multilayer block 10 together with an IC chip 6 as a circuit element. Block 6A is an IF signal wiring section, and block 6B is a DC circuit wiring section.

  In the configuration shown in FIG. 5, the above-described level of isolation is provided by the reflector of the conductor post 22A (22B) described above to reduce the wraparound from the transmitting antenna 30A to the receiving antenna 30A, thereby increasing the isolation level. The condition of −30 dB is satisfied.

Japanese Patent Application No. 2009-262629

http://www.ieee802.org/15/pub/TG3c.html “Single-layer Feed Waveguide Consisting of Posts for Plane TEM Wave Excitation in Parallel Plates” Jiro Hirooka and Makoto Ando, IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 46, NO. 5, MAY, 1998 "Feed through an Aperture to a Post-Wall Waveguide with Step Structure" Takafumi. KAI, Jiro HIROKAWA, and Makoto ANDO, IEICE TRANCS. COMMUN, VOLE.E88-B, NO.3, pp.1298-1302, MARCH 2005. “Post-Wall Waveguide Antenna for Millimeter-Wave File Transfer System” Hiroshi Nakano, Ryosuke Suga, Yasuhiro Hirachi, Jiro Hirokawa, Makoto Ando, IEICE Transactions 597-603 VOL.J93-C NO.12 DECEMBER 2010 “Cost-Effective 60-GHz Antenna Package With End-Fire Radiation for Wireless File-Transfer System” Ryosuke Suga, Hiroshi Nakano, Yasutake Hirachi, Jiro Hirokawa, and Makoto Ando, IEEE TRANSACTIONS THEORY AND TECHNIQUES, VOL. 58, NO.12 , DEMBER 2010

  As described above, the previous configurations presented in Patent Document 1 and Non-Patent Documents 4 and 5 can maintain the gain of 6 dBi in the frequency band of 59 to 66 GHz and satisfy the required isolation characteristics. However, there is no margin for the required specification, and there is a possibility that the specification requirement may not be satisfied due to the manufacturing tolerance of the antenna or the secondary mounting on the printed circuit board.

  Accordingly, an object of the present invention is to provide a post-wall waveguide antenna having a novel structure capable of ensuring a sufficient margin with respect to required specifications while maintaining miniaturization, and an antenna module having the same.

An antenna according to the present invention that achieves the above object has as a first aspect,
A post wall waveguide antenna formed in a dielectric block,
A post-wall waveguide formed in a first region of the dielectric block,
Wherein formed on the second region of the dielectric block has a dielectric waveguide which is continuous from the opening of the first region formed post-wall waveguide,
The post wall waveguide has both side post walls and a back post wall formed of a plurality of metal pillars vertically passing through the first region of the dielectric block, and further includes at least the both side post walls and the back post wall; Each of the upper and lower end surfaces of the plurality of metal pillars has conductor foils formed on the upper and lower surfaces of the first region of the dielectric block corresponding to the region surrounded by the both side post walls and the rear post wall. Connected to the conductor foil, and configured to have the opening on the side opposite to the rear post wall,
The dielectric waveguide has post walls on both sides thereof,
A post wall of the dielectric waveguide penetrates the second region of the dielectric block and is provided only on the plurality of metal columns arranged along the both sides and on the upper and lower end surfaces of the plurality of metal columns. Correspondingly, it is formed in the second region and is constituted by a conductive foil connected to each of the upper and lower ends of the plurality of metal pillars .

An antenna according to the present invention that achieves the above object is provided as a second aspect,
A post wall waveguide antenna formed in a dielectric block,
A pair of post-wall waveguide formed in a first region of the dielectric block,
A pair of dielectric waveguides formed in the second region of the dielectric block and continuous from the respective openings of the pair of post wall waveguides formed in the first region;
Each of the pair of post wall waveguides has both side post walls and rear post walls formed by a plurality of metal pillars vertically passing through the first region of the dielectric block, and at least the both side post walls And a conductive foil formed on the upper and lower surfaces of the first region of the dielectric block corresponding to the region surrounded by the rear post wall and the both side post walls and the rear post wall, and above and below the plurality of metal columns. Each of both end faces is connected to the conductor foil and is configured to have the opening on the opposite side of the rear post wall, and the pair of dielectric waveguides have a post wall on each side,
A post wall of the dielectric waveguide penetrates the second region of the dielectric block and is provided only on the plurality of metal columns arranged along the both sides and on the upper and lower end surfaces of the plurality of metal columns. Correspondingly, it is formed in the second region and is constituted by a conductive foil connected to each of the upper and lower ends in the plurality of metals .

As a fifth aspect, in the fourth aspect,
The pair of dielectric waveguides correspond to the transmission side and the reception side, and among the post walls on both sides of the pair of dielectric waveguides, the adjacent post walls on the transmission side and the reception side are:
The transmission side and the reception side are common.

Further, as a sixth side surface, in the first or third side surface, the width of the dielectric waveguide is larger than the opening of the post wall waveguide, and the opening and the dielectric waveguide It has the inclination area | region which connects a width | variety, It is characterized by the above-mentioned.

An antenna module according to the present invention that achieves the above object is provided as a first aspect,
An antenna module in which a post wall waveguide antenna formed in a dielectric block and a circuit element for processing a reception signal and a transmission signal of the post wall waveguide antenna are integrally formed,
The post wall waveguide antenna is
A pair of post wall waveguides formed in a first region of the dielectric block ;
A pair of dielectric waveguides formed in the second region of the dielectric block and continuous from the respective openings of the pair of post wall waveguides formed in the first region;
Each of the pair of post wall waveguides has both side post walls and rear post walls formed by a plurality of metal pillars vertically passing through the first region of the dielectric block, and at least the both side post walls And a conductive foil formed on the upper and lower surfaces of the first region of the dielectric block corresponding to the region surrounded by the rear post wall and the both side post walls and the rear post wall, and above and below the plurality of metal columns. Each of both end faces is connected to the conductor foil and is configured to have the opening on the side opposite to the rear post wall, and the pair of dielectric waveguides has a post wall on each side,
A post wall of the dielectric waveguide penetrates the second region of the dielectric block and is provided only on the plurality of metal columns arranged along the both sides and on the upper and lower end surfaces of the plurality of metal columns. Correspondingly formed in the second region, constituted by conductive foils connected to the upper and lower ends in the plurality of metals,
It is characterized by that.

The third side of the antenna module is the second side of the antenna module,
The pair of dielectric waveguides correspond to the transmission side and the reception side, and among the post walls on both sides of the pair of dielectric waveguides, the adjacent post walls on the transmission side and the reception side are:
The transmission side and the reception side are common.

According to a fourth aspect of the antenna module, in the first aspect, the width of the dielectric waveguide is larger than the opening of the post wall waveguide, and the width of the opening and the dielectric waveguide It has the inclination area | region which connects.

  Furthermore, a fourth aspect of the antenna module is characterized in that, in the first aspect, the circuit element includes an IC chip having a function of transmitting and receiving a microwave signal.

  According to the characteristic configuration of the present invention, an antenna capable of obtaining a sufficient isolation level between transmitting and receiving antennas and an antenna module using the antenna can be obtained.

It is a conceptual perspective view of the waveguide antenna which the present inventors proposed previously. It is a top view of the waveguide antenna of FIG. It is a top view of the conceptual structure explaining an antenna module. It is a block diagram of an example of the RF part of the antenna module provided with the transmission / reception function. It is a figure which shows the top view of the antenna module corresponding to the block diagram of FIG. It is a perspective view of the Example structure of the antenna according to this invention. FIG. 7 is a top view of FIG. 6. It is sectional drawing which follows the AA line in FIG. It is sectional drawing which follows the BB line in FIG. It is a figure which shows the preparation procedure of the part of FIG. 8A as an example. It is a figure which shows the upper surface outline of the transmission / reception antenna part at the time of setting it as the antenna module which has the antenna according to this invention shown in FIG. 6 for transmission / reception. It is a top view which shows the structural example of the antenna module which has a transmission / reception antenna of the structure which shares post wall 201A. It is a figure which shows sectional drawing which follows the CC line | wire of FIG. 6 shows the directivity characteristics of an antenna according to the present invention calculated for frequencies 59 to 66 GHz using a three-dimensional electromagnetic field simulation on the H plane (see the lower right diagram in FIG. 6). The directional characteristics of the antenna according to the present invention calculated for frequencies 59 to 66 GHz using a three-dimensional electromagnetic field simulation on the E plane (see the lower right diagram in FIG. 6) are shown. Two types of antennas reported in Non-Patent Documents 4 and 5: [1]: Gain 2.2 dBi, [2]: Isolation level [3] between the transmitting and receiving antennas of the antenna module of the present invention compared to 6.0 dBi. It is a graph to show.

  Embodiments according to the present invention will be described below with reference to the drawings.

  FIG. 6 is a perspective view of a configuration of an embodiment of an antenna according to the present invention (referred to as a post-wall waveguide antenna), and is shown in a perspective form for easy understanding.

  FIG. 7 is a top view of FIG. 6 and is also shown in perspective. 8A and 8B are cross-sectional views taken along lines AA and BB in FIG. 6, respectively.

  Referring to these drawings, the post-wall waveguide antenna according to the present invention is characterized mainly in that it has a post-wall waveguide 100 and a dielectric waveguide (slab waveguide) 200 (see FIG. 7).

  The portion of the post wall waveguide 100 is basically the same as the conventional example shown in FIG. 1, a plurality of conductor posts (metal pillars) 2 are formed on the dielectric block 1, and the upper and lower end faces of the conductive post 2 are further formed. A conductive foil 3A (3B) connected to each of these is formed and configured. Furthermore, it has the conversion part in which the pseudo coaxial center conductor 4 is inserted in the back side.

  The dielectric block 1 (dielectric constant 3.6) forms an interface with air (dielectric constant 1). Therefore, the dielectric block 1 itself is used as a dielectric waveguide (slab waveguide) as a millimeter wave (or microwave). ) Propagation path.

  In the configuration of FIG. 6, the region of the opening 5 of the post wall waveguide 100 is continuous with the dielectric waveguide 200 formed by the dielectric block itself, and the post block waveguide 100 and the dielectric waveguide (slab waveguide) are connected to the dielectric block 1. A configuration having a (waveguide) 200 is realized.

  An electromagnetic wave output from the opening 5 of the post wall waveguide 100 is emitted to the space through the dielectric waveguide 200.

  In the embodiment of FIG. 6, post walls 201 </ b> A (201 </ b> B) are preferably formed on both sides of the dielectric waveguide 200.

  That is, since the dielectric itself having an interface with a substance having a different dielectric constant becomes a propagation path for propagating electromagnetic waves by itself, the post walls 201A (201B) on both sides of the dielectric waveguide 200 are essential. is not.

  However, providing post walls 201A (201B) on both sides of the dielectric waveguide 200 to identify the propagation path is advantageous for reducing radiation loss and thus increasing gain. Furthermore, in consideration of the case where the post wall waveguide antenna of the present invention is disposed adjacent to the transmission side and the reception side, the configuration in which the post wall 201A (201B) is provided is used to obtain a necessary isolation level. This is an advantageous means.

  Further, as shown in FIG. 7, in the embodiment, the conductor posts (metal columns) 21 constituting the post walls 201A (201B) are formed in a plurality of rows (two rows), but may be one row.

  Further, as can be easily understood later from the description of the formation process according to FIG. 9, the post wall 201 </ b> A (201 </ b> B) is formed simultaneously with the conductor post 2 constituting the post wall waveguide 100.

  Furthermore, the conductor foil 31 that is electrically connected to the upper end side of the conductor post 21 of the dielectric waveguide 200 and covers the upper side of the opening 5 of the post wall waveguide 100 is formed as shown in FIG. It is formed along the post walls 201 </ b> A (201 </ b> B) on both sides of the waveguide 200 and corresponding to the upper part of the opening 5 of the post wall waveguide 100.

  The reason for forming the conductor foil 31 can be explained as follows with reference to FIGS. 8A and 8B.

  8A and 8B are cross-sectional views taken along lines AA and BB in FIG. 6, respectively. As will be described later, the post-wall waveguide 100 and the dielectric waveguide 200 are formed of dielectric multilayers, and have a dielectric layer L5 formed on the conductor foil 3A as the uppermost layer.

  Therefore, there is a risk that the radio wave radiated by the dielectric waveguide 200 may cause unnecessary radio wave propagation toward the center conductor 4 through the inside of the dielectric layer L5. Therefore, by forming the conductive foil 31 on the dielectric layer L5 and electrically connecting the conductive foil 3A with the plurality of conductive posts 31A, the radio wave propagation in the reverse direction by the dielectric layer L5 is suppressed. .

  In the antenna embodiment shown in FIG. 6, the opening width of the opening 5 of the post wall waveguide 100 and the width of the dielectric waveguide 200 are different. Further, the opening 5 of the post-wall waveguide 100 gradually has an inclined region indicated by a double arrow that changes so as to coincide with the width of the dielectric waveguide 200. The reason for providing such an inclined region is to prevent a higher order mode from being generated by a step of the opening width by forming a gentle transition of the opening width.

  As described above, FIGS. 8A and 8B are cross-sectional views taken along lines AA and BB in FIG. 6 and have a multilayer structure. FIG. 9 is a diagram showing a procedure for forming the multilayer structure of the portion of FIG. 8A as an example.

  First, an insulating layer is prepared in which metal layers E1 and E2 such as copper foil are attached to the upper and lower surfaces of a semi-cured organic resin layer L3 (FIG. 9 (1)). For example, a glass cloth base epoxy resin obtained by impregnating a glass cloth with an epoxy resin is used as the semi-cured organic resin layer L3.

  Next, the metal layers E1 and E2 are etched away by patterning, leaving only portions corresponding to the central conductor 4 of the pseudo-coaxial 42 (FIG. 9B).

  Similarly, an organic resin layer L4 in which a metal layer E3 is stretched on one side with a glass cloth base epoxy resin is pasted on the organic resin layer L3. Next, vias are formed through the organic resin layer L4 to the patterned metal layer E2 on the lower side of the organic resin layer L3 at a position to become the pseudo coaxial center conductor 4, and the inner surface thereof is conductively plated (see FIG. 9 (3)).

  Further, an organic resin layer L2 having a metal layer E4 stretched on one side is pasted to the organic resin layer L3 on the opposite side to the organic resin layer L4 (FIG. 9 (4)).

  Next, the metal layers E3 and E4 are patterned to form conductor foils 3A and 3B, respectively, and the upper terminal electrode 4A of the center conductor 4 is left. Next, vias are formed at positions corresponding to the metal pillars 2 forming the post walls, and the inner surfaces thereof are conductively plated (FIG. 9 (5)).

  Further, the organic resin layer L1 is attached to the lower side of the organic resin layer L2, and similarly, an organic resin layer L5 having a metal layer on one side is attached to the organic resin layer L4. The metal layer on the organic resin layer L5 is patterned to form the pseudo coaxial outer conductor 42A and the conductor foil 31 region (FIG. 9 (6)).

  Subsequently, the organic resin layer L5 is perforated with a laser and plated to form a connection post 31A for electrically connecting the conductor foil 31 and the conductor foil 3A. (FIG. 9 (7)).

  Through the above steps, the cross-sectional structure shown in FIG. 8A can be obtained.

  As an example, in the cross section of FIG. 8A, the thickness of each layer of the multilayer configuration is as follows as an example.

Organic resin layer L1 = L5 = 30 μm, L2 = L4 = 300 μm, L3 = 260 μm
Here, FIG. 10 shows a schematic top view of the transmitting / receiving antenna unit when the antenna module according to the present invention shown in FIG. 6 is used for transmission and reception.

  In FIG. 10, the receiving-side antenna has a dielectric waveguide 200Rx, and the transmitting-side antenna has a dielectric waveguide 200Tx.

  From the description of FIG. 7, the dielectric waveguide 200Rx and the dielectric waveguide 200Tx have post walls 201A (201B) on both sides, but in the embodiment of FIG. 10, the dielectric waveguide 200Tx of the adjacent transmitting and receiving antennas. The dielectric waveguide 200Rx shares the post wall 201A. This prevents an increase in the lateral width of the antenna module.

  FIG. 11 is a top view illustrating a configuration example of an antenna module having a transmission / reception antenna configured to share the post wall 201A. FIG. 12 is a cross-sectional view taken along the line CC of FIG.

  The antenna module has a multilayered dielectric layer such as a glass cloth base epoxy resin, a post wall waveguide antenna 300 having a transmission / reception antenna composed of a post waveguide 100 and a dielectric waveguide 200Tx (200Rx), and a wiring layer. 6A and 6B are formed, and the multi-layer block body 10 is configured as described in FIG.

  Further, the IC chip 6 is mounted on the multilayer block body 10 as a circuit element by flip mounting or wire bonding (only the region where the IC chip 6 is mounted is shown in FIG. 11).

  As an example, the block body 10 having a multilayer structure has a size of approximately 16 mm × 14 mm square. On the back surface of the block body 10 having such a multilayer structure, a plurality of electrode pads 6C for connecting to an external circuit are provided corresponding to the IF signal wiring portion 6A and the DC signal wiring (DC) portion 6B. Yes.

  Therefore, it is possible to configure a wireless device as a component part of a PC card in which the antenna module shown in FIG. 11 is inserted and connected to a personal computer. Alternatively, a wireless device can be obtained by directly mounting the antenna module on the motherboard of a personal computer.

  Next, the antenna characteristics of the antenna module according to the present invention configured as described above will be described.

  13A and 13B are directivity characteristics of the antenna unit according to the present invention calculated for a frequency of 59 to 66 GHz using a three-dimensional electromagnetic field simulation on the H plane and the E plane (see the lower right diagram in FIG. 6), respectively. It can be understood that the beam width is about 60 degrees for both the E and E planes.

  On the other hand, FIG. 14 shows two types of antennas reported in Non-Patent Documents 4 and 5: [1]: Gain 2.2 dBi, [2]: Gain 6.0 dBi. It is a graph which shows the level [3] of isolation.

  The conventional antenna [2] having a gain of 6 dBi satisfies the required isolation (being -30 dB in the 59 GHz to 66 GHz band). However, there is no margin with respect to the required specifications, and there is a possibility that the specifications will be lowered due to manufacturing tolerances and secondary mounting on the printed circuit board.

  On the other hand, the antenna [3] according to the present invention secures a sufficient margin of about 20 dB with respect to the required specifications.

1 Dielectric block 2, 21A (21B), 22A (22B) Conductor post (metal pillar)
3A, 3B, 31 Conductor foil (eg copper foil)
4 Center conductor 40 Pad 41 Strip line 42 Pseudo coaxial 5 Opening 6 IC chip 100 Post wall waveguide 200 Dielectric waveguide (slab waveguide)
201A (201B) Post wall 300 Post wall waveguide antenna

Claims (8)

A post wall waveguide antenna formed in a dielectric block,
A post-wall waveguide formed in a first region of the dielectric block,
Wherein formed on the second region of the dielectric block has a dielectric waveguide which is continuous from the opening of the first region formed post-wall waveguide,
The post wall waveguide has both side post walls and a back post wall formed of a plurality of metal pillars vertically passing through the first region of the dielectric block, and further includes at least the both side post walls and the back post wall; Each of the upper and lower end surfaces of the plurality of metal pillars has conductor foils formed on the upper and lower surfaces of the first region of the dielectric block corresponding to the region surrounded by the both side post walls and the rear post wall. Connected to the conductor foil, and configured to have the opening on the side opposite to the rear post wall,
The dielectric waveguide has post walls on both sides thereof,
A post wall of the dielectric waveguide penetrates the second region of the dielectric block and is provided only on the plurality of metal columns arranged along the both sides and on the upper and lower end surfaces of the plurality of metal columns. Correspondingly formed in the second region, constituted by a conductive foil connected to each of the upper and lower ends of the plurality of metal pillars,
A post-wall waveguide antenna characterized by that. A post wall waveguide antenna formed in a dielectric block,
A pair of post-wall waveguide formed in a first region of the dielectric block,
A pair of dielectric waveguides formed in the second region of the dielectric block and continuous from the respective openings of the pair of post wall waveguides formed in the first region;
Each of the pair of post wall waveguides has both side post walls and rear post walls formed by a plurality of metal pillars vertically passing through the first region of the dielectric block, and at least the both side post walls And a conductive foil formed on the upper and lower surfaces of the first region of the dielectric block corresponding to the region surrounded by the rear post wall and the both side post walls and the rear post wall, and above and below the plurality of metal columns. Each of both end faces is connected to the conductor foil and is configured to have the opening on the side opposite to the rear post wall, and the pair of dielectric waveguides has a post wall on each side,
A post wall of the dielectric waveguide penetrates the second region of the dielectric block and is provided only on the plurality of metal columns arranged along the both sides and on the upper and lower end surfaces of the plurality of metal columns. Correspondingly formed in the second region, constituted by conductive foils connected to the upper and lower ends in the plurality of metals,
A post-wall waveguide antenna characterized by that. Oite to claim 2,
The pair of dielectric waveguides correspond to a transmission side and a reception side, and among the post walls on both sides of the pair of dielectric waveguides, adjacent post walls on the transmission side and the reception side are the transmission side. And common to the receiving side,
A post-wall waveguide antenna characterized by that. Claim 1 or Oite 2, further magnitude of the width of the dielectric waveguide is larger than the opening of the post Kabeshirubeha path, the inclined region connecting the width of the dielectric waveguide and the opening Have
A post-wall waveguide antenna characterized by that. An antenna module in which a post wall waveguide antenna formed in a dielectric block and a circuit element for processing a reception signal and a transmission signal of the post wall waveguide antenna are integrally formed,
The post wall waveguide antenna is
A pair of post wall waveguides formed in a first region of the dielectric block ;
A pair of dielectric waveguides formed in the second region of the dielectric block and continuous from the respective openings of the pair of post wall waveguides formed in the first region;
Each of the pair of post wall waveguides has both side post walls and rear post walls formed by a plurality of metal pillars vertically passing through the first region of the dielectric block, and at least the both side post walls And a conductive foil formed on the upper and lower surfaces of the first region of the dielectric block corresponding to the region surrounded by the rear post wall and the both side post walls and the rear post wall, and above and below the plurality of metal columns. Each of both end faces is connected to the conductor foil and is configured to have the opening on the opposite side of the rear post wall, and further has a post wall on each side of the pair of dielectric waveguides ,
A post wall of the dielectric waveguide penetrates the second region of the dielectric block and is provided only on the plurality of metal columns arranged along the both sides and on the upper and lower end surfaces of the plurality of metal columns. Correspondingly formed in the second region, constituted by conductive foils connected to the upper and lower ends in the plurality of metals,
An antenna module characterized by that. Oite to claim 5,
The pair of dielectric waveguides correspond to a transmission side and a reception side, and among the post walls on both sides of the pair of dielectric waveguides, adjacent post walls on the transmission side and the reception side are the transmission side. And common to the receiving side,
An antenna module characterized by that. Oite to claim 5, further the size of the width of the dielectric waveguide is larger than the opening of the post wall waveguide has an inclined region connecting the width of the dielectric waveguide and the opening,
An antenna module characterized by that. Oite to claim 5,
An antenna module comprising an IC chip having a function of transmitting and receiving a microwave signal as the circuit element.