Nothing Special   »   [go: up one dir, main page]

JP6557566B2 - Waveguide slot antenna - Google Patents

Waveguide slot antenna Download PDF

Info

Publication number
JP6557566B2
JP6557566B2 JP2015185040A JP2015185040A JP6557566B2 JP 6557566 B2 JP6557566 B2 JP 6557566B2 JP 2015185040 A JP2015185040 A JP 2015185040A JP 2015185040 A JP2015185040 A JP 2015185040A JP 6557566 B2 JP6557566 B2 JP 6557566B2
Authority
JP
Japan
Prior art keywords
waveguide
slot antenna
forming members
axis direction
tube axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2015185040A
Other languages
Japanese (ja)
Other versions
JP2017060086A (en
Inventor
智和 園嵜
智和 園嵜
洋 赤井
洋 赤井
圭 服部
圭 服部
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTN Corp
Original Assignee
NTN Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NTN Corp filed Critical NTN Corp
Priority to JP2015185040A priority Critical patent/JP6557566B2/en
Priority to US15/754,682 priority patent/US10355364B2/en
Priority to CN201680053629.XA priority patent/CN108028467A/en
Priority to EP16846252.1A priority patent/EP3352302A4/en
Priority to PCT/JP2016/075405 priority patent/WO2017047381A1/en
Publication of JP2017060086A publication Critical patent/JP2017060086A/en
Application granted granted Critical
Publication of JP6557566B2 publication Critical patent/JP6557566B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Waveguide Aerials (AREA)

Description

本発明は、導波管スロットアンテナに関する。   The present invention relates to a waveguide slot antenna.

周知のように、導波管スロットアンテナは、無線通信機能を備えた種々の機器(システム)において、高周波帯域の電波(例えばミリ波帯の電波)や、低周波帯域の電波(例えばセンチメートル波帯の電波)を送受信するためのアンテナとして使用されている。ミリ波帯の電波は、例えば車載用レーダシステムで利用され、センチメートル波帯の電波は、例えば、放送衛星(BS)や通信衛星(CS)などによる衛星放送システム、無線LANやBluetooth(登録商標)などのデータ伝送システム、電子料金収受システム(ETC(登録商標))などで利用されている。なお、ミリ波帯の電波とは、波長1〜10mm、周波数30〜300GHzの電波であり、センチメートル波帯の電波とは、波長10〜100mm、周波数3〜30GHzの電波である。   As is well known, a waveguide slot antenna is used in various devices (systems) having a wireless communication function in a high frequency band (for example, a millimeter wave band) or a low frequency band (for example, a centimeter wave). It is used as an antenna for transmitting and receiving radio waves). Millimeter-wave radio waves are used in, for example, in-vehicle radar systems, and centimeter-wave radio waves are used in satellite broadcasting systems such as broadcasting satellites (BS) and communication satellites (CS), wireless LANs, and Bluetooth (registered trademark). ) And other data transmission systems, electronic fee collection systems (ETC (registered trademark)), and the like. The millimeter wave band radio wave is a radio wave having a wavelength of 1 to 10 mm and a frequency of 30 to 300 GHz, and the centimeter wave band radio wave is a radio wave having a wavelength of 10 to 100 mm and a frequency of 3 to 30 GHz.

無線通信機能を備えた各種システムの低価格化を推進すべく、導波管スロットアンテナのコスト低減を図る必要が生じている。そこで、本出願人は、下記の特許文献1において、樹脂製の導波管スロットアンテナを提案している。より具体的には、管軸方向に延びた導波路を有し、導波路の画成面が導電性被膜で被覆された樹脂製の導波管と、該導波管に、その管軸方向に沿って所定間隔で設けられた複数の放射スロットとを備え、導波管が、横断面(管軸方向と直交する断面)が有端状をなし、相手側と結合されることで導波路を画成する第1および第2の導波管形成部材で構成された導波管スロットアンテナである。   In order to promote cost reduction of various systems having a wireless communication function, it is necessary to reduce the cost of the waveguide slot antenna. Therefore, the present applicant has proposed a resin-made waveguide slot antenna in the following Patent Document 1. More specifically, a resin-made waveguide having a waveguide extending in the tube axis direction, in which the defined surface of the waveguide is coated with a conductive coating, and the waveguide in the tube axis direction. And a plurality of radiating slots provided at predetermined intervals along the waveguide, and the waveguide has an end shape in cross section (cross section orthogonal to the tube axis direction), and is coupled to the other side of the waveguide. Is a waveguide slot antenna composed of first and second waveguide forming members that define

特開2014−60700号公報JP 2014-60700 A

ところで、特に低周波数帯域の電波を送受信する用途では、波長との関係でアンテナサイズを大きくする(アンテナを長寸化する)必要があるが、特許文献1に記載の導波管スロットアンテナにおいて、そのサイズを大きくした場合、温度変化等に伴って導波管(両導波管形成部材の何れか一方又は双方)に望まない変形、例えば、管軸方向に沿う方向の反りや曲りが生じ易い。そして、上記のような変形が生じると、
・導波路の形状精度に悪影響が及び、電波の伝搬効率が低下する、
・両導波管形成部材の結合部に隙間が生じ、この隙間を介して導波路を伝搬する電波が外部に漏れ易くなる、
などといった不具合が生じ易くなることから、所望のアンテナ特性を安定的に発揮することができなくなる。
By the way, especially in an application for transmitting and receiving radio waves in a low frequency band, it is necessary to increase the antenna size (increase the length of the antenna) in relation to the wavelength. In the waveguide slot antenna described in Patent Document 1, When the size is increased, undesired deformation of the waveguide (either one or both of the waveguide forming members), for example, warping or bending in the direction along the tube axis direction is likely to occur due to a temperature change or the like. . And when the above deformation occurs,
・ The shape accuracy of the waveguide is adversely affected and the propagation efficiency of radio waves is reduced.
-A gap is generated at the coupling part of both waveguide forming members, and radio waves propagating through the waveguide through this gap are likely to leak to the outside.
Therefore, the desired antenna characteristics cannot be stably exhibited.

以上の実情に鑑み、本発明の目的は、温度変化等に伴う導波管形成部材の変形を可及的に防止可能とし、これにより所望のアンテナ特性を安定的に発揮することのできる導波管スロットアンテナを実現することにある。   In view of the above circumstances, an object of the present invention is to make it possible to prevent the deformation of the waveguide forming member due to temperature change as much as possible, and to thereby stably exhibit desired antenna characteristics. It is to realize a tube slot antenna.

上記の目的を達成するために創案された本発明は、管軸方向に延びた導波路を有し、導波路の画成面が導電性被膜で被覆された樹脂製の導波管と、導波管の管軸方向に沿って所定間隔で設けられた複数の放射スロットとを備えた導波管スロットアンテナであって、導波管が、導波路の延在方向各部における横断面が有端状をなし、相手側と結合されることで導波路を画成する第1および第2の導波管形成部材で構成されるものにおいて、管軸方向に沿って配置された芯金を有し、この芯金が、第1および第2の導波管形成部材の双方に保持されていることを特徴とする。   The present invention, which was created to achieve the above object, includes a waveguide made of a resin having a waveguide extending in the direction of the tube axis, the defined surface of the waveguide being covered with a conductive coating, and a waveguide. A waveguide slot antenna having a plurality of radiation slots provided at predetermined intervals along the tube axis direction of the wave tube, wherein the waveguide has an end in cross section at each part in the extending direction of the waveguide Formed of the first and second waveguide forming members that form a waveguide by being coupled to the other side, and having a cored bar arranged along the tube axis direction The cored bar is held by both the first and second waveguide forming members.

上記のように、第1および第2の導波管形成部材の双方で、管軸方向に沿って配置された芯金(管軸方向に延びる芯金)を保持しておけば、両導波管形成部材の結合体からなる導波管の曲げ剛性やねじり剛性を高めることができるので、温度変化等に伴う導波管の変形(特に管軸方向に沿う方向の反り・曲がり)が生じ難くなる。このため、上述のような不具合が生じる可能性を可及的に減じ、所望のアンテナ特性を安定的に発揮することのできる導波管スロットアンテナを実現することができる。   As described above, if both the first and second waveguide forming members hold the core metal (core metal extending in the tube axis direction) arranged along the tube axis direction, both waveguides are provided. Since the bending rigidity and torsional rigidity of the waveguide composed of the combined tube-forming members can be increased, the deformation of the waveguide (particularly warping / bending in the direction along the tube axis direction) hardly occurs due to temperature changes. Become. For this reason, the waveguide slot antenna which can reduce the possibility that the above-mentioned malfunctions occur as much as possible and can stably exhibit desired antenna characteristics can be realized.

上記構成において、第1および第2の導波管形成部材の少なくとも一方を、芯金を一体的に有する樹脂の射出成形品(芯金をインサート部品とした樹脂の射出成形品)とすることができる。このようにすれば、少なくとも上記一方の成形収縮に伴う変形も可及的に防止することができる。このため、成形収縮に伴う変形に起因した導波管形成部材同士の結合精度の低下等も可及的に防止することが可能となり、これを通じて、アンテナ特性に優れた導波管スロットアンテナを安定的に得ることができる。   In the above-described configuration, at least one of the first and second waveguide forming members may be a resin injection molded product (resin injection molded product using a core metal as an insert part) integrally including a core metal. it can. In this way, at least deformation due to one of the molding contractions can be prevented as much as possible. For this reason, it is possible to prevent as much as possible the deterioration of the coupling accuracy between the waveguide forming members due to deformation due to molding shrinkage, and through this, the waveguide slot antenna with excellent antenna characteristics can be stabilized. Can be obtained.

上記構成において、芯金を、第1の芯金と第2の芯金の結合体で構成し、第1の導波管形成部材を、第1の芯金を一体的に有する樹脂の射出成形品(第1の芯金をインサート部品とした樹脂の射出成形品)で構成すると共に、第2の導波管形成部材を、第2の芯金を一体的に有する樹脂の射出成形品(第2の芯金をインサート部品とした樹脂の射出成形品)で構成するようにしても良い。このようにすれば、第1および第2の導波管形成部材の双方について、その成形収縮に伴う変形を可及的に防止することができるので、一層アンテナ特性に優れた導波管スロットアンテナを安定的に得ることができる。   In the above configuration, the core metal is constituted by a combination of the first core metal and the second core metal, and the first waveguide forming member is a resin injection molding integrally including the first core metal. Product (resin injection-molded product using the first cored bar as an insert part), and the second waveguide forming member is a resin injection-molded product (second molded unit) integrally including the second cored bar. It is also possible to use a resin injection-molded product using the second cored bar as an insert part. In this way, both the first and second waveguide forming members can be prevented from being deformed due to molding shrinkage as much as possible, so that the waveguide slot antenna having further excellent antenna characteristics. Can be obtained stably.

芯金は、導波管の壁部内に埋設しても良いし、その一部を導波管の外表面に露出させても良い。   The core metal may be embedded in the wall portion of the waveguide, or a part thereof may be exposed on the outer surface of the waveguide.

第1および第2の導波管形成部材は、何れも、上記横断面が凹形状をなすものとすることができる。   Both the first and second waveguide forming members may have a concave cross section.

以上に示すように、本発明によれば、温度変化等に伴う導波管(導波管形成部材)の変形を可及的に防止することができるので、所望のアンテナ特性を安定的に発揮することのできる導波管スロットアンテナを実現することができる。   As described above, according to the present invention, it is possible to prevent the deformation of the waveguide (waveguide forming member) due to temperature change as much as possible, so that desired antenna characteristics can be stably exhibited. It is possible to realize a waveguide slot antenna that can be used.

(a)図は、本発明に係る導波管スロットアンテナを備えたアンテナユニットの概略平面図、(b)図は、同背面図である。(A) is a schematic plan view of an antenna unit provided with a waveguide slot antenna according to the present invention, and (b) is a rear view of the same. (a)図は、本発明の第1実施形態に係る導波管スロットアンテナの概略横断面図、(b)図は図1(a)中に示すY−Y線概略断面図である。(A) is a schematic cross-sectional view of the waveguide slot antenna according to the first embodiment of the present invention, and (b) is a schematic cross-sectional view taken along line YY shown in FIG. 1 (a). (a)図は、図2に示す導波管スロットアンテナの組立方法の一例を示す概略斜視図、(b)図および(c)図は、同アンテナの組立方法の他例を示す概略斜視図である。(A) is a schematic perspective view showing an example of an assembly method of the waveguide slot antenna shown in FIG. 2, and (b) and (c) are schematic perspective views showing another example of the assembly method of the antenna. It is. (a)図は、本発明の第2実施形態に係る導波管スロットアンテナの組立前の状態における概略斜視図、(b)図は、同アンテナの概略斜視図である。FIG. 4A is a schematic perspective view of a waveguide slot antenna according to a second embodiment of the present invention before assembly, and FIG. 4B is a schematic perspective view of the antenna. (a)図は、本発明の第3実施形態に係る導波管スロットアンテナの部分平面図、(b)図は、(a)図中に示すX−X線概略断面図、(c)図は、(a)図中に示すY−Y線概略断面図である。(A) is a partial plan view of a waveguide slot antenna according to a third embodiment of the present invention, (b) is a schematic cross-sectional view taken along line XX shown in (a), and (c) is a diagram. (A) It is a YY line schematic sectional drawing shown in a figure. (a)図は、本発明の第4実施形態に係る導波管スロットアンテナの概略横断面図、(b)図は、本発明の第5実施形態に係る導波管スロットアンテナの概略横断面図である。(A) is a schematic cross-sectional view of a waveguide slot antenna according to a fourth embodiment of the present invention, and (b) is a schematic cross-sectional view of a waveguide slot antenna according to a fifth embodiment of the present invention. FIG.

以下、本発明の実施の形態を、図面を参照しながら説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図1(a)(b)に、本発明の第1実施形態に係る導波管スロットアンテナAを備えたアンテナユニット1の概略平面図及び概略背面図をそれぞれ示す。図1に示すアンテナユニット1は、センチメートル波帯の電波を送受信するためのものであって、並列に接続された複数本(図示例では5本)の導波管スロットアンテナAと、各導波管スロットアンテナAに高周波電力(電波)を供給する給電導波管9[図1(b)中に二点鎖線で示す]とを備える。導波管スロットアンテナAを並列に接続するための手段に特段の限定はなく、例えば、接着、両面テープ止め、凹凸嵌合などの固定手段を単独で、あるいは二種以上組み合わせることができる。5本の導波管スロットアンテナAのうち、例えば中央部に配置されたアンテナAは電波の送信用アンテナとして機能させることができ、その両側に2本ずつ配置されたアンテナAは電波の受信用アンテナとして機能させることができる。なお、このアンテナユニット1を24GHz帯の電波を送受信するための用途に用いる場合、各導波管スロットアンテナAのサイズは、例えば、管軸方向(図1の紙面上下方向)の寸法:100mm、幅方向(図1の紙面左右方向)の寸法:20mm、高さ方向(図1において紙面と直交する方向)の寸法:5mm、とされる。   FIGS. 1A and 1B show a schematic plan view and a schematic rear view of an antenna unit 1 including a waveguide slot antenna A according to the first embodiment of the present invention. An antenna unit 1 shown in FIG. 1 is for transmitting and receiving centimeter-wave radio waves, and includes a plurality of (in the illustrated example, five) waveguide slot antennas A connected in parallel and each conductor. A feeding waveguide 9 [indicated by a two-dot chain line in FIG. There are no particular limitations on the means for connecting the waveguide slot antennas A in parallel. For example, fixing means such as adhesion, double-sided tape fastening, and concave-convex fitting can be used alone or in combination of two or more. Of the five waveguide slot antennas A, for example, the antenna A arranged at the center can function as a radio wave transmitting antenna, and two antennas A arranged on both sides of the antenna A can receive radio waves. It can function as an antenna. When the antenna unit 1 is used for transmitting and receiving radio waves in the 24 GHz band, the size of each waveguide slot antenna A is, for example, a dimension in the tube axis direction (up and down direction in FIG. 1): 100 mm, The dimension in the width direction (left and right direction in FIG. 1) is 20 mm, and the dimension in the height direction (direction perpendicular to the sheet in FIG. 1) is 5 mm.

次に、各導波管スロットアンテナAの詳細構造を説明する。導波管スロットアンテナAは、図2(a)(b)にも示すように、内部に管軸方向に延びた導波路2を有する導波管10と、導波管10の管軸方向に沿って所定間隔で設けられた複数の放射スロット3と、導波管10の管軸方向の一端に設けられ、導波路2に高周波電力を供給する給電スロット5と、を備える。図1(a)に示すように、本実施形態の放射スロット3は、その幅方向中央部を通って延びる直線が管軸方向に対して45°傾くように設けられているが、管軸方向に対する放射スロット3の傾斜角は、用途等に応じて適宜設定することができる。   Next, the detailed structure of each waveguide slot antenna A will be described. As shown in FIGS. 2A and 2B, the waveguide slot antenna A includes a waveguide 10 having a waveguide 2 extending in the tube axis direction and a tube axis direction of the waveguide 10. A plurality of radiating slots 3 provided at predetermined intervals along the waveguide 10 and a feeding slot 5 provided at one end in the tube axis direction of the waveguide 10 and supplying high-frequency power to the waveguide 2. As shown in FIG. 1A, the radiation slot 3 of the present embodiment is provided such that a straight line extending through the center in the width direction is inclined by 45 ° with respect to the tube axis direction. The inclination angle of the radiating slot 3 with respect to can be set as appropriate according to the application.

図2(a)(b)に示すように、導波管10は、導波路2の延在方向各部における横断面が方形状をなす方形導波管とされる。より具体的には、互いに平行な頂壁10aおよび底壁10bと、互いに平行な側壁10c,10dとを備え、さらに、管軸方向の一端および他端開口を閉塞する終端壁10e,10fを備える。複数の放射スロット3は頂壁10aに設けられ、給電スロット5は底壁10bに設けられている。本実施形態において、頂壁10aおよび底壁10bの横断面寸法は、側壁10c,10dの横断面寸法よりも長寸とされる。なお、以下では、説明の便宜上、頂壁10aが設けられた側を上側、底壁10bが設けられた側を下側とも言うが、導波管スロットアンテナAの使用態様を限定するわけではない。   As shown in FIGS. 2A and 2B, the waveguide 10 is a rectangular waveguide having a rectangular cross section at each portion in the extending direction of the waveguide 2. More specifically, it includes a top wall 10a and a bottom wall 10b that are parallel to each other, side walls 10c and 10d that are parallel to each other, and end walls 10e and 10f that close one end and the other end opening in the tube axis direction. . The plurality of radiation slots 3 are provided on the top wall 10a, and the power supply slot 5 is provided on the bottom wall 10b. In the present embodiment, the cross-sectional dimensions of the top wall 10a and the bottom wall 10b are longer than the cross-sectional dimensions of the side walls 10c and 10d. In the following, for convenience of explanation, the side on which the top wall 10a is provided is referred to as the upper side, and the side on which the bottom wall 10b is provided is referred to as the lower side, but the usage mode of the waveguide slot antenna A is not limited. .

頂壁10aには、その外表面に開口した窪み部4が管軸方向に沿って複数設けられ、各窪み部4の内底面に一の放射スロット3が開口している。本実施形態では、窪み部4を平面視で真円状に形成しているが、窪み部4は、平面視で矩形状、楕円状等に形成することもできる。このような窪み部4を設けることにより、グレーティングローブとも称される不要放射が抑制される。   The top wall 10a is provided with a plurality of recesses 4 opened on the outer surface thereof along the tube axis direction, and one radiation slot 3 is opened on the inner bottom surface of each recess 4. In this embodiment, although the hollow part 4 is formed in perfect circle shape by planar view, the hollow part 4 can also be formed in rectangular shape, ellipse shape, etc. by planar view. By providing such a depression 4, unnecessary radiation, also called a grating lobe, is suppressed.

導波管10は、導波路2の延在方向各部における横断面が有端状をなす第1および第2の導波管形成部材11,12を結合することで形成される。具体的には、図2(a)に示すように、放射スロット3が設けられた頂壁10aと、側壁10c,10dおよび終端壁10e,10fの一部(上側部分)とを一体に有する第1の導波管形成部材11と、給電スロット5が設けられた底壁10bと、側壁10c,10dおよび終端壁10e,10fの残部(下側部分)とを一体に有する第2の導波管形成部材12とを結合することで導波管10が形成される。要するに、本実施形態の導波管10は、上記横断面が下側に開口した凹形状をなす第1の導波管形成部材11と、上記横断面が上側に開口した凹形状をなす第2の導波管形成部材12とを結合することで形成される。   The waveguide 10 is formed by joining the first and second waveguide forming members 11 and 12 whose cross sections in the extending direction of the waveguide 2 have end shapes. Specifically, as shown in FIG. 2A, the top wall 10a provided with the radiation slot 3, and the side walls 10c and 10d and the end walls 10e and 10f partly (upper part) are integrated. A first waveguide forming member 11, a bottom wall 10 b provided with a power supply slot 5, and a side wall 10 c, 10 d and the remaining portions (lower portions) of the end walls 10 e, 10 f are integrated into a second waveguide. The waveguide 10 is formed by coupling the forming member 12. In short, the waveguide 10 of the present embodiment includes a first waveguide forming member 11 having a concave shape with the transverse section opened downward, and a second waveguide with the concave shape having the transverse section opened upward. It is formed by joining the waveguide forming member 12.

第1の導波管形成部材11は、樹脂の射出成形品とされ、射出成形と同時に放射スロット3および窪み部4が型成形される。また、第2の導波管形成部材12も樹脂の射出成形品とされ、射出成形と同時に給電スロット5が型成形される。導波管形成部材11,12の成形用樹脂としては、例えば、液晶ポリマー(LCP)、ポリフェニレンサルファイド(PPS)およびポリアセタール(POM)の群から選択される少なくとも一種の熱可塑性樹脂をベース樹脂としたものが使用され、ベース樹脂には、必要に応じて、グラスファイバー(GF)やカーボンファイバー(CF)等の充填材が一種又は複数種添加される。以上で例示した樹脂の中でも、LCPは、PPS等に比べて形状安定性に優れ、かつ成形に伴うバリの発生量を抑制し得る点で好ましい。   The first waveguide forming member 11 is a resin injection-molded product, and the radiation slot 3 and the recessed portion 4 are molded at the same time as the injection molding. The second waveguide forming member 12 is also an injection molded product of resin, and the power supply slot 5 is molded simultaneously with the injection molding. As the molding resin for the waveguide forming members 11 and 12, for example, at least one thermoplastic resin selected from the group of liquid crystal polymer (LCP), polyphenylene sulfide (PPS) and polyacetal (POM) is used as a base resin. One or a plurality of fillers such as glass fiber (GF) and carbon fiber (CF) are added to the base resin as necessary. Among the resins exemplified above, LCP is preferable in that it has excellent shape stability compared to PPS and the like and can suppress the amount of burrs generated during molding.

第1の導波管形成部材11のうち導波路2を画成する面、および第2の導波管形成部材12のうち導波路2を画成する面は、図2(a)中の拡大図に示すような導電性被膜6で被覆されている。これにより、導波路2に沿って電波を円滑に伝播させることができる。なお、導電性被膜6は、両導波管形成部材11,12の表面全域に形成しても構わない。このようにすれば、導電性被膜6の形成前におけるマスキングの形成作業と、導電性被膜6の形成後におけるマスキングの除去作業とが不要となるので、被膜形成コスト、ひいては導波管スロットアンテナAの製造コストを抑えることができる。   The surface that defines the waveguide 2 in the first waveguide forming member 11 and the surface that defines the waveguide 2 in the second waveguide forming member 12 are enlarged in FIG. It is covered with a conductive film 6 as shown in the figure. As a result, radio waves can be smoothly propagated along the waveguide 2. Note that the conductive coating 6 may be formed over the entire surface of both the waveguide forming members 11 and 12. In this way, the masking forming operation before the formation of the conductive film 6 and the masking removing operation after the formation of the conductive film 6 are not required. The manufacturing cost can be reduced.

導電性被膜6は、単層の金属メッキ被膜で構成しても構わないが、ここでは、導波管形成部材11,12に析出形成した第1被膜6aと、この第1被膜6a上に析出形成した第2被膜6bとで導電性被膜6を構成している。第1被膜6aは、銅、銀、金等、特に導電性(電波の伝搬性)に優れた金属のメッキ被膜とすることができ、また、第2被膜6bは、ニッケル等、耐久性(耐腐食性)に優れた金属のメッキ被膜とすることができる。導電性被膜6をこのような積層構造とすることにより、導電性被膜6に高い導電性と高い耐久性とを同時に付与することができることに加え、高価な金属である銅や銀等の使用量を抑えてコスト増を抑制することができる。   The conductive coating 6 may be composed of a single-layer metal plating coating, but here, the first coating 6a deposited on the waveguide forming members 11 and 12 and deposited on the first coating 6a. The conductive film 6 is composed of the formed second film 6b. The first coating 6a can be a plating coating of metal such as copper, silver, gold, etc. that is particularly excellent in electrical conductivity (propagation of radio waves), and the second coating 6b can be made of a durable (anti-resistance) such as nickel. It is possible to obtain a metal plating film having excellent corrosion resistance. By making the conductive coating 6 have such a laminated structure, high conductivity and high durability can be imparted to the conductive coating 6 at the same time, and the amount of expensive metals such as copper and silver used. It is possible to suppress the increase in cost.

導電性被膜6(6a,6b)は、例えば、電解メッキ法や無電解メッキ法で形成することができるが、無電解メッキ法の方が好ましい。無電解メッキ法の方が、電解メッキ法よりも均一厚みの導電性被膜6(6a,6b)を得易いため、所望のアンテナ特性を確保する上で有利となるからである。導電性被膜6の膜厚は、これが薄過ぎると耐久性に乏しくなり、逆に厚過ぎると被膜形成に多大な時間を要してコスト高を招来する。かかる観点から、導電性被膜6の膜厚は0.2μm以上1.5μm以下とするのが好ましい。なお、本実施形態のように、導電性被膜6を第1被膜6aと第2被膜6bの積層構造とする場合、第1被膜6aおよび第2被膜6bの膜厚は、それぞれ、例えば0.1〜1.0μm程度および0.1〜0.5μm程度とすることができる。   The conductive coating 6 (6a, 6b) can be formed by, for example, an electrolytic plating method or an electroless plating method, but the electroless plating method is preferable. This is because the electroless plating method is more advantageous in securing desired antenna characteristics because it is easier to obtain the conductive coating 6 (6a, 6b) having a uniform thickness than the electrolytic plating method. If the film thickness of the conductive coating 6 is too thin, the durability becomes poor. Conversely, if the film is too thick, it takes a long time to form the coating, resulting in high costs. From this point of view, the thickness of the conductive coating 6 is preferably 0.2 μm or more and 1.5 μm or less. When the conductive coating 6 has a laminated structure of the first coating 6a and the second coating 6b as in the present embodiment, the film thickness of the first coating 6a and the second coating 6b is, for example, 0.1. It can be about -1.0 micrometer and about 0.1-0.5 micrometer.

導波管スロットアンテナAを構成する導波管10は、管軸方向に沿って配置され、第1および第2の導波管形成部材11,12の双方に保持された芯金20をさらに有する。芯金20は、図3にも示すように、管軸方向に延びる矩形状(長方形状)の板状部材からなり、その一面を上下方向(導波管10の高さ方向)に沿って配置した起立姿勢で側壁10c,10dの内部にそれぞれ埋設されている。すなわち、本実施形態において、一対の芯金20,20は、導波管10の内側面(導波路2)および外側面の何れにも露出していない。芯金20は、例えば、ステンレス鋼、黄銅、アルミニウム(アルミニウム合金)等の金属板の他、鉄又は銅を主成分とする焼結金属製の板状部材を採用することができる。なお、導波路2を伝搬する電波の伝搬性を一層高めるため、芯金20としては、導電性に優れた黄銅板やアルミニウム板を採用するのが特に好ましい。   The waveguide 10 constituting the waveguide slot antenna A further includes a cored bar 20 disposed along the tube axis direction and held by both the first and second waveguide forming members 11 and 12. . As shown in FIG. 3, the cored bar 20 is made of a rectangular (rectangular) plate-like member extending in the tube axis direction, and one surface thereof is arranged along the vertical direction (the height direction of the waveguide 10). In the standing posture, they are embedded in the side walls 10c and 10d. That is, in the present embodiment, the pair of core bars 20 is not exposed on either the inner side surface (waveguide 2) or the outer side surface of the waveguide 10. The cored bar 20 can employ, for example, a plate member made of sintered metal mainly composed of iron or copper, in addition to a metal plate such as stainless steel, brass, and aluminum (aluminum alloy). In addition, in order to further improve the propagation property of the radio wave propagating through the waveguide 2, it is particularly preferable to employ a brass plate or an aluminum plate having excellent conductivity as the cored bar 20.

一対の芯金20,20は、例えば、以下の(1)〜(3)に示す何れかの手段(手順)を採用することにより、第1および第2導波管形成部材11,12の双方で保持することができる。
(1)芯金20,20の上側部分を第1の導波管形成部材11(の側壁10c,10dを構成する部分)に設けた保持部11aに嵌合すると共に、芯金20,20の下側部分を第2の導波管形成部材12(の側壁10c,10dを構成する部分)に設けた保持部12aに嵌合する[図3(a)を参照]。
(2)芯金20,20の下側部分を第2の導波管形成部材12で一体的に保持するように、芯金20,20をインサート部品として第2の導波管形成部材12を樹脂で射出成形してから、芯金20,20の上側部分(第2の導波管形成部材12から突出した部分)を第1の導波管形成部材11の側壁10c,10dを構成する部分にそれぞれ設けた保持部11aに嵌合する[図3(b)を参照]。
(3)芯金20,20の上側部分を第1の導波管形成部材11で一体的に保持するように、芯金20,20をインサート部品として第1の導波管形成部材11を樹脂で射出成形してから、芯金20,20の下側部分(第1の導波管形成部部材11から突出した部分)を第2の導波管形成部材12の側壁10c,10dを構成する部分にそれぞれ設けた保持部12aに嵌合する[図3(c)を参照]。
The pair of cored bars 20 and 20 adopts either of the means (procedures) shown in the following (1) to (3), for example, so that both the first and second waveguide forming members 11 and 12 are used. Can be held in.
(1) While fitting the upper part of the metal cores 20 and 20 into the holding part 11a provided on the first waveguide forming member 11 (the part constituting the side walls 10c and 10d), The lower portion is fitted into a holding portion 12a provided on the second waveguide forming member 12 (the portion constituting the side walls 10c and 10d thereof) [see FIG. 3 (a)].
(2) The second waveguide forming member 12 is used as an insert part so that the lower portion of the core metal 20, 20 is integrally held by the second waveguide forming member 12. The portions constituting the side walls 10c, 10d of the first waveguide forming member 11 after the injection molding with resin, the upper portions of the core bars 20, 20 (portions protruding from the second waveguide forming member 12) Are fitted to the holding portions 11a respectively provided in FIG. 3 (see FIG. 3B).
(3) The first waveguide forming member 11 is made of resin using the core metals 20 and 20 as insert parts so that the upper portions of the core metals 20 and 20 are integrally held by the first waveguide forming member 11. After the injection molding, the lower portions (portions protruding from the first waveguide forming member 11) of the core bars 20, 20 constitute the side walls 10c, 10d of the second waveguide forming member 12. It fits into the holding | maintenance part 12a provided in each part [refer FIG.3 (c)].

なお、本実施形態では、上記(2)の手段を採用することにより、一対の芯金20,20を両導波管形成部材11,12で保持している。ここで、上記(2)の手段を採用する場合において、第1の導波管形成部材11に設けた保持部11aの上下方向寸法が、この保持部11aで保持すべき芯金20の上側部分の上下方向寸法よりも小さいと、第1の導波管形成部材11と第2の導波管形成部材12の対向二面を当接させることができない(両導波管形成部材11,12間に隙間が生じる)ため、アンテナ特性に悪影響が及ぶ可能性がある。そのため、保持部11aの上下方向寸法は、この保持部11aで保持すべき芯金20の上側部分の上下方向寸法よりも大きく設定しておく。上記(1)又は(3)の手段を採用する場合においても、同様の理由から、保持部11a,12aの上下方向寸法を設定する。   In the present embodiment, by adopting the above means (2), the pair of core bars 20 and 20 are held by both waveguide forming members 11 and 12. Here, in the case of adopting the above means (2), the vertical dimension of the holding portion 11a provided in the first waveguide forming member 11 is the upper portion of the core metal 20 to be held by the holding portion 11a. If the dimension is smaller than the vertical dimension, the two opposing surfaces of the first waveguide forming member 11 and the second waveguide forming member 12 cannot be brought into contact with each other (between the two waveguide forming members 11 and 12). This may cause a bad influence on the antenna characteristics. Therefore, the vertical dimension of the holding part 11a is set larger than the vertical dimension of the upper part of the cored bar 20 to be held by the holding part 11a. Even when the above means (1) or (3) is employed, the vertical dimension of the holding portions 11a and 12a is set for the same reason.

以上から、本実施形態に係る導波管スロットアンテナA(導波管10)は、第1の導波管形成部材11を樹脂で射出成形すると共に、芯金20,20をインサート部品として第2の導波管形成部材12を樹脂で射出成形してから、両導波管形成部材11,12の導波路2を画成する面に導電性被膜6を形成し、その後、両導波管形成部材11,12を結合することで完成する。第1の導波管形成部材11と第2の導波管形成部材12の結合方法は任意であり、例えば、両導波管形成部材11,12の当接部に塗布した接着剤を硬化させる接着や、両導波管形成部材11,12の当接部において、導波管形成部材11,12同士を溶着させる溶着などを採用することができる。この他にも、両導波管形成部材11,12の何れか一方に設けた凹部に対し、他方に設けた凸部を嵌合(圧入)することにより、両導波管形成部材11,12を結合することもできる。また、芯金20を利用して両導波管形成部材11,12を結合することも可能である。具体的には、例えば、芯金20の上側部分を第1の導波管形成部材11に設けた保持部11aに対して圧入(締まり嵌めの状態で嵌合)する、接着剤を充填した保持部11aに対して芯金20の上側部分を嵌合した後に接着剤を硬化させる、などを採用することもできる。   From the above, in the waveguide slot antenna A (waveguide 10) according to the present embodiment, the first waveguide forming member 11 is injection-molded with a resin, and the core bars 20 and 20 are used as insert parts. After the waveguide forming member 12 is injection-molded with resin, the conductive coating 6 is formed on the surface defining the waveguide 2 of both the waveguide forming members 11 and 12, and then both waveguides are formed. This is completed by joining the members 11 and 12 together. The method of joining the first waveguide forming member 11 and the second waveguide forming member 12 is arbitrary. For example, the adhesive applied to the contact portions of the two waveguide forming members 11 and 12 is cured. Adhesion or welding for welding the waveguide forming members 11 and 12 to each other at the contact portion between the two waveguide forming members 11 and 12 can be employed. In addition to this, both the waveguide forming members 11, 12 are fitted (press-fitted) into the concave portions provided in either one of the two waveguide forming members 11, 12. Can also be combined. It is also possible to couple the waveguide forming members 11 and 12 using the cored bar 20. Specifically, for example, the upper portion of the cored bar 20 is press-fitted (fitted with an interference fit) into the holding portion 11a provided on the first waveguide forming member 11, and is filled with an adhesive. For example, the adhesive may be cured after the upper portion of the core bar 20 is fitted to the portion 11a.

なお、両導波管形成部材11,12を結合するのに接着剤を使用する場合、接着剤としては、例えば熱硬化型接着剤、紫外線硬化型接着剤、嫌気性接着剤などを使用することができるが、接着剤を硬化させる際に加熱処理が必要となる熱硬化型接着剤では、加熱処理に伴って、樹脂製の導波管形成部材11,12が変形等する可能性がある。そのため、接着剤としては紫外線硬化型接着剤や嫌気性接着剤が好ましい。なお、接着剤は一般に絶縁体であるので、導波路2の画成面に接着剤が付着すると電波の伝搬性に悪影響が及ぶ可能性がある。そのため、両導波管形成部材11,12を結合するのに接着剤を用いる場合、導波路2の画成面に接着剤が付着しないように注意を払うことが肝要である。   In the case where an adhesive is used to join the two waveguide forming members 11 and 12, for example, a thermosetting adhesive, an ultraviolet curable adhesive, an anaerobic adhesive, or the like is used as the adhesive. However, in the case of a thermosetting adhesive that requires heat treatment when the adhesive is cured, the resin-made waveguide forming members 11 and 12 may be deformed or the like with heat treatment. Therefore, an ultraviolet curable adhesive or an anaerobic adhesive is preferable as the adhesive. In addition, since the adhesive is generally an insulator, if the adhesive adheres to the defined surface of the waveguide 2, there is a possibility that the radio wave propagation may be adversely affected. For this reason, when an adhesive is used to join the two waveguide forming members 11 and 12, it is important to pay attention so that the adhesive does not adhere to the defined surface of the waveguide 2.

以上で説明したように、本実施形態の導波管スロットアンテナAでは、第1および第2の導波管形成部材11,12の双方で管軸方向に沿って配置された芯金20を保持している。このようにすれば、導波管10の曲げ剛性やねじり剛性が高まるので、温度変化等に伴って、両導波管形成部材11,12の何れか一方又は双方が変形しようとしても、その変形を芯金20で規制することができる。このため、導波管形成部材11,12の変形により導波路2の形状精度に狂いが生じることで電波の伝搬性が低下する、両導波管形成部材11,12の結合部に隙間が生じ、この隙間を介して導波路2を伝搬する電波が外部に漏れ出す、などといった不具合が生じる可能性を可及的に低減することができる。従って、所望のアンテナ特性を安定的に発揮することのできる導波管スロットアンテナAを実現することができる。   As described above, in the waveguide slot antenna A of the present embodiment, both the first and second waveguide forming members 11 and 12 hold the cored bar 20 arranged along the tube axis direction. doing. In this way, since the bending rigidity and torsional rigidity of the waveguide 10 are increased, even if one or both of the waveguide forming members 11 and 12 are deformed due to a temperature change or the like, the deformation Can be regulated by the cored bar 20. For this reason, the deformation of the waveguide forming members 11 and 12 causes a deviation in the shape accuracy of the waveguide 2, thereby reducing the radio wave propagation property. A gap is generated at the coupling portion between the two waveguide forming members 11 and 12. The possibility that a problem such as leakage of radio waves propagating through the waveguide 2 through the gap leaks to the outside can be reduced as much as possible. Therefore, the waveguide slot antenna A that can stably exhibit desired antenna characteristics can be realized.

特に本実施形態では、第2の導波管形成部材12を、芯金20を一体的に有する樹脂の射出成形品(芯金20をインサート部品とした樹脂の射出成形品)としたので、第2の導波管形成部材12については、その成形収縮に伴う変形も可及的に防止することができる。このため、第2の導波管形成部材12の成形収縮に伴う変形に起因した導波管形成部材11,12同士の結合精度の低下等も可及的に防止することが可能となり、これを通じて、アンテナ特性に優れた導波管スロットアンテナAを安定的に量産することができる。   In particular, in the present embodiment, the second waveguide forming member 12 is a resin injection-molded product (resin injection-molded product using the core metal 20 as an insert part) integrally including the core metal 20. As for the second waveguide forming member 12, deformation due to molding shrinkage can be prevented as much as possible. For this reason, it is possible to prevent as much as possible a decrease in the coupling accuracy between the waveguide forming members 11 and 12 due to deformation accompanying the molding shrinkage of the second waveguide forming member 12, and through this. The waveguide slot antenna A having excellent antenna characteristics can be stably mass-produced.

以上、本発明の第1実施形態に係る導波管スロットアンテナAについて説明を行ったが、この導波管スロットアンテナAには、本発明の要旨を逸脱しない範囲で適宜の変更を施すことが可能である。以下、本発明の他の実施形態について図面を参照しながら説明するが、以上で説明した第1実施形態に準ずる構成には共通の参照番号を付し、重複説明を出来る限り省略する。   The waveguide slot antenna A according to the first embodiment of the present invention has been described above. However, the waveguide slot antenna A may be appropriately modified without departing from the gist of the present invention. Is possible. Hereinafter, other embodiments of the present invention will be described with reference to the drawings. However, configurations similar to those of the first embodiment described above are denoted by common reference numerals, and redundant description is omitted as much as possible.

図4(特に図4(b))に、本発明の第2実施形態に係る導波管スロットアンテナAの概略斜視図(横断面を含む概略斜視図)を示す。同図に示す導波管スロットアンテナAが、上述した導波管スロットアンテナAと異なる主な点は、導波管10の側壁10c,10dのそれぞれに埋設した芯金20を、第1の芯金20Aと第2の芯金20Bとの結合体で構成し、第1の導波管形成部材11を、第1の芯金20Aを一体的に有する樹脂の射出成形品(第1の芯金20Aをインサート部品とした樹脂の射出成形品)で構成すると共に、第2の導波管形成部材12を、第2の芯金20Bを一体的に有する樹脂の射出成形品(第2の芯金20Bをインサート部品とした樹脂の射出成形品)で構成した点にある。   FIG. 4 (particularly FIG. 4B) shows a schematic perspective view (schematic perspective view including a transverse section) of the waveguide slot antenna A according to the second embodiment of the present invention. The main difference between the waveguide slot antenna A shown in the figure and the waveguide slot antenna A is that the core metal 20 embedded in each of the side walls 10c and 10d of the waveguide 10 is used as the first core. A resin injection-molded product (first cored bar) that is composed of a combination of the gold 20A and the second cored bar 20B, and the first waveguide forming member 11 is integrally formed with the first cored bar 20A. 20A is a resin injection-molded product using insert parts), and the second waveguide forming member 12 is a resin injection-molded product (second core metal) integrally including a second metal core 20B. 20B is a resin injection molded product using insert parts).

このようにすれば、第1および第2の導波管形成部材11,12の双方について、成形収縮に伴う変形を可及的に防止することができるので、両導波管形成部材11,12の結合精度を一層高めることができる。そのため、一層アンテナ特性に優れた導波管スロットアンテナAを実現することができる。なお、本実施形態では、図4(a)(b)に示すように、第1の芯金20A(の下端)に設けた凹部に対し、第2の芯金20B(の上端)に設けた凸部を圧入することにより、両芯金20A,20Bの結合体からなる芯金20を実現している。なお、両芯金20A,20Bは、上記の圧入以外にも、例えば、接着、圧入と接着の併用等の手段によって結合させることもできる。また、両導波管形成部材11,12は、任意の方法で結合することができる。   In this way, both the first and second waveguide forming members 11 and 12 can be prevented from being deformed due to molding shrinkage as much as possible. The coupling accuracy can be further increased. Therefore, the waveguide slot antenna A having further excellent antenna characteristics can be realized. In the present embodiment, as shown in FIGS. 4A and 4B, the second cored bar 20B (the upper end) is provided with respect to the recess provided in the first cored bar 20A (the lower end). The cored bar 20 made of a combination of both the cored bars 20A and 20B is realized by press-fitting the convex part. In addition to the above press-fitting, both the cores 20A and 20B can be coupled by means such as adhesion, combined use of press-fitting and adhesion, and the like. Moreover, both the waveguide forming members 11 and 12 can be coupled by an arbitrary method.

図5(a)〜(c)のそれぞれに、本発明の第3実施形態に係る導波管スロットアンテナAの部分平面図、横断面図および縦断面図を概念的に示す。この実施形態の導波管スロットアンテナAでは、図5(a)に示すように、複数の放射スロット3を管軸方向に沿って所定間隔で配置してなる放射スロット列を導波管10の幅方向に二列設けると共に、一方の放射スロット列を構成する放射スロット3と他方の放射スロット列を構成する放射スロット3の管軸方向における配設位置を互いに異ならせている。簡単に言うと、この実施形態の導波管スロットアンテナAでは、放射スロット3および窪み部4が千鳥状に複数配置されている。   5A to 5C conceptually show a partial plan view, a transverse sectional view, and a longitudinal sectional view of a waveguide slot antenna A according to a third embodiment of the present invention. In the waveguide slot antenna A of this embodiment, as shown in FIG. 5A, a radiating slot array in which a plurality of radiating slots 3 are arranged at predetermined intervals along the tube axis direction is provided on the waveguide 10. Two rows are provided in the width direction, and the arrangement positions of the radiation slots 3 constituting one radiation slot row and the radiation slots 3 constituting the other radiation slot row are different from each other in the tube axis direction. In brief, in the waveguide slot antenna A of this embodiment, a plurality of radiation slots 3 and recesses 4 are arranged in a staggered manner.

また、この実施形態の導波管スロットアンテナA(導波管10)は、図5(b)(c)に示すように、側壁10c,10dと平行に配設され、導波路2を二条の導波路2A,2Bに分岐させる分岐壁10gと、放射スロット3の形成位置において導波路2(2A,2B)の断面積を縮小させる複数の内壁13とをさらに有する。内壁13は底壁10bの内底面に立設されており、管軸方向で隣り合う2つの内壁13,13のうち、相対的に給電スロット5に近い側の内壁13の高さ寸法をh1、相対的に給電スロット5から遠い側の内壁13の高さ寸法をh2としたとき、h1≦h2の関係式を満たすように形成されている[図5(c)中の拡大図参照]。一方の放射スロット列は導波路2Aに沿って形成され、他方の放射スロット列は導波路2Bに沿って形成されている。 In addition, the waveguide slot antenna A (waveguide 10) of this embodiment is disposed in parallel with the side walls 10c and 10d as shown in FIGS. A branch wall 10g that branches into the waveguides 2A and 2B and a plurality of inner walls 13 that reduce the cross-sectional area of the waveguide 2 (2A and 2B) at the position where the radiation slot 3 is formed are further included. The inner wall 13 is erected on the inner bottom surface of the bottom wall 10b. Of the two inner walls 13, 13 adjacent in the tube axis direction, the height dimension of the inner wall 13 on the side relatively close to the power supply slot 5 is h 1. When the height dimension of the inner wall 13 relatively far from the power supply slot 5 is h 2 , the inner wall 13 is formed so as to satisfy the relational expression h 1 ≦ h 2 [enlarged view in FIG. reference]. One radiation slot row is formed along the waveguide 2A, and the other radiation slot row is formed along the waveguide 2B.

上記のように、放射スロット3の形成位置において導波路2の断面積を縮小させる内壁13を設けておけば、導波路2を伝搬する電波の放射効率を高めることができる。特に、管軸方向で隣り合う2つの内壁13,13のうち、相対的に給電スロット5に近い側の内壁13の高さ寸法をh1、相対的に給電口5から遠い側の内壁13の高さ寸法をh2としたとき、h1≦h2の関係式を満たすようにすれば、各放射スロット3を介して当該アンテナAの外部に放射される電波量が放射スロット3相互間でばらつき難くなり、各放射スロット3から概ね等しい量の電波を放射することが可能となる。従って、管軸方向各部でアンテナ性能にばらつきが生じるのを可及的に回避することができ、導波管スロットアンテナAの信頼性が向上する。 As described above, if the inner wall 13 for reducing the cross-sectional area of the waveguide 2 is provided at the position where the radiation slot 3 is formed, the radiation efficiency of the radio wave propagating through the waveguide 2 can be increased. In particular, of the two inner walls 13 and 13 adjacent in the tube axis direction, the height dimension of the inner wall 13 on the side relatively close to the power supply slot 5 is h 1 , and the inner wall 13 on the side relatively far from the power supply port 5 is. When the height dimension is h 2 , if the relational expression h 1 ≦ h 2 is satisfied, the amount of radio waves radiated to the outside of the antenna A through each radiation slot 3 is changed between the radiation slots 3. It becomes difficult to vary, and it is possible to radiate a substantially equal amount of radio waves from each radiation slot 3. Therefore, it is possible to avoid variations in antenna performance in each part of the tube axis direction as much as possible, and the reliability of the waveguide slot antenna A is improved.

この実施形態の導波管スロットアンテナAを構成する導波管10も、導波路2の延在方向各部における横断面が有端状をなし、少なくとも導波路2の画成面が導電性被膜6で被覆された樹脂製の第1および第2の導波管形成部材11,12を結合することで形成される。具体的には、放射スロット3および窪み部4が設けられた頂壁10aと、側壁10c,10d、終端壁10e,10fおよび分岐壁10gの一部(上側部分)とを一体に有する第1の導波管形成部材11と、給電スロット5が設けられた底壁10bと、側壁10c,10d、終端壁10e,10fおよび分岐壁10gの残部(下側部分)とを一体に有する第2の導波管形成部材12とを結合することで導波管10が形成される。   The waveguide 10 constituting the waveguide slot antenna A of this embodiment also has an end-shaped cross section at each part in the extending direction of the waveguide 2, and at least the defined surface of the waveguide 2 is the conductive coating 6. The first and second waveguide-forming members 11 and 12 made of resin covered with are joined together. Specifically, a first wall 10a provided with the radiating slot 3 and the depression 4 and a side wall 10c, 10d, an end wall 10e, 10f, and a part of the branch wall 10g (upper part) are integrated. The second waveguide having the waveguide forming member 11, the bottom wall 10b provided with the feeding slot 5, the side walls 10c and 10d, the end walls 10e and 10f, and the remainder (lower part) of the branch wall 10g. The waveguide 10 is formed by coupling with the wave tube forming member 12.

また、この実施形態の導波管スロットアンテナAも、管軸方向に沿って配置され、第1および第2の導波管形成部材11,12の双方に保持された芯金20をさらに有する。芯金20は、管軸方向に延びる矩形状(長方形状)の板状部材からなり、その一面を上下方向に沿って配置した起立姿勢で側壁10c,10dおよび分岐壁10gの内部にそれぞれ埋設されている。上記態様で芯金20を配設したことにより、本実施形態の導波管スロットアンテナAも、図2等に示す導波管スロットアンテナAと同様の作用効果を享受することができる。   The waveguide slot antenna A of this embodiment also has a cored bar 20 that is disposed along the tube axis direction and is held by both the first and second waveguide forming members 11 and 12. The cored bar 20 is formed of a rectangular (rectangular) plate-like member extending in the tube axis direction, and is embedded in the side walls 10c and 10d and the branch wall 10g in a standing posture in which one surface is arranged along the vertical direction. ing. By disposing the cored bar 20 in the above-described manner, the waveguide slot antenna A of the present embodiment can also enjoy the same effects as the waveguide slot antenna A shown in FIG.

なお、詳細な図示は省略するが、この実施形態においては、3つの芯金20の全てを両導波管形成部材11,12の何れか一方で一体的に保持するように、3つの芯金20をインサート部品として第1又は第2の導波管形成部材11,12を樹脂で射出成形することができる他、側壁10c,10dでそれぞれ保持される芯金20,20をインサート部品として両導波管形成部材11,12の何れか一方を樹脂で射出成形すると共に、分岐壁10gで保持される芯金20をインサート部品として両導波管形成部材11,12の他方を樹脂で射出成形することもできる。   In addition, although detailed illustration is abbreviate | omitted, in this embodiment, it is three core bars so that all the three core bars 20 may be hold | maintained integrally by either of the both waveguide formation members 11 and 12. FIG. The first and second waveguide forming members 11 and 12 can be injection-molded with resin using the insert 20 as an insert component, and the two cores 20 and 20 held by the side walls 10c and 10d are used as insert components. Either one of the wave tube forming members 11 and 12 is injection-molded with resin, and the other one of the waveguide forming members 11 and 12 is injection-molded with resin using the cored bar 20 held by the branch wall 10g as an insert part. You can also

図6(a)に、本発明の第4実施形態に係る導波管スロットアンテナAの概略横断面図を示す。同図に示す導波管スロットアンテナAは、図5(a)〜(c)に示す導波管スロットアンテナAの変形例であり、分岐壁10gを、第1および第2の導波管形成部材11,12のみで形成している。すなわち、分岐壁10gは芯金20を保持していない。なお、図6(a)では、第1の導波管形成部材11の分岐壁10gを形成する部分に設けた凹部に対し、第2の導波管形成部材12の分岐壁10gを形成する部分に設けた凸部を嵌合(圧入)することにより、分岐壁10gを形成している。   FIG. 6A shows a schematic cross-sectional view of a waveguide slot antenna A according to the fourth embodiment of the present invention. The waveguide slot antenna A shown in the figure is a modification of the waveguide slot antenna A shown in FIGS. 5A to 5C, and the branch wall 10g is formed with the first and second waveguides. Only the members 11 and 12 are formed. That is, the branch wall 10g does not hold the cored bar 20. In FIG. 6A, a portion where the branch wall 10g of the second waveguide forming member 12 is formed with respect to a concave portion provided in a portion where the branch wall 10g of the first waveguide forming member 11 is formed. The branch wall 10g is formed by fitting (press-fitting) the convex portions provided on the wall.

図6(b)に、本発明の第5実施形態に係る導波管スロットアンテナAの概略横断面図を示す。同図に示す導波管スロットアンテナAは、図5(a)〜(c)に示す導波管スロットアンテナAの変形例であり、側壁10cで保持した芯金20および側壁10dで保持した芯金20の一面を導波管10の外側面に露出させている。図示は省略するが、図2および図4に示す導波管スロットアンテナAにおいても同様の構成を採用しても良い。   FIG. 6B shows a schematic cross-sectional view of a waveguide slot antenna A according to the fifth embodiment of the present invention. A waveguide slot antenna A shown in the figure is a modification of the waveguide slot antenna A shown in FIGS. 5A to 5C, and a core metal 20 held by a side wall 10c and a core held by a side wall 10d. One surface of the gold 20 is exposed to the outer surface of the waveguide 10. Although illustration is omitted, the same configuration may be adopted in the waveguide slot antenna A shown in FIGS.

以上で説明した本発明の実施形態に係る導波管スロットアンテナAは、上述したように、温度変化等に伴う変形を可及的に防止することができるという特徴を有する。そのため、本発明は、導波管スロットアンテナの中でも、特に、波長との関係でアンテナサイズを大きくする(管軸方向に長寸化する)必要があり、温度変化等に伴う変形が生じ易い低周波帯域の電波を送受信するための導波管スロットアンテナに好ましく適用することができる。   As described above, the waveguide slot antenna A according to the embodiment of the present invention described above has a feature that it is possible to prevent as much deformation as possible due to a temperature change or the like. Therefore, among the waveguide slot antennas, it is necessary to increase the antenna size (increase in the tube axis direction) particularly in relation to the wavelength, and the deformation is easily caused by a temperature change or the like. The present invention can be preferably applied to a waveguide slot antenna for transmitting and receiving radio waves in the frequency band.

本発明は前述した実施形態に何ら限定されるものではなく、本発明の要旨を逸脱しない範囲内において、さらに種々の形態で実施し得ることは勿論である。本発明の範囲は、特許請求の範囲によって示され、さらに特許請求の範囲に記載の均等の意味、および範囲内のすべての変更を含む。   The present invention is not limited to the above-described embodiments, and can of course be implemented in various forms without departing from the gist of the present invention. The scope of the present invention is defined by the terms of the claims, and includes the equivalent meanings recited in the claims and all modifications within the scope.

1 アンテナユニット
2 導波路
3 放射スロット
5 給電スロット
10 導波管
11 第1の導波管形成部材
12 第2の導波管形成部材
20 芯金
20A 第1の芯金
20B 第2の芯金
A 導波管スロットアンテナ
DESCRIPTION OF SYMBOLS 1 Antenna unit 2 Waveguide 3 Radiation slot 5 Feed slot 10 Waveguide 11 1st waveguide formation member 12 2nd waveguide formation member 20 Core metal 20A 1st metal core 20B 2nd metal core A Waveguide slot antenna

Claims (4)

管軸方向に延びた導波路を有し、該導波路の画成面が導電性被膜で被覆された樹脂製の導波管と、該導波管の管軸方向に沿って所定間隔で設けられた複数の放射スロットとを備えた導波管スロットアンテナであって、前記導波管が、前記導波路の延在方向各部における横断面が有端状をなし、相手側と結合されることで前記導波路を画成する第1および第2の導波管形成部材からなるものにおいて、
前記管軸方向に沿って配置された芯金を有し、該芯金が、前記第1および第2の導波管形成部材の双方に保持されており、
前記第1および第2の導波管形成部材の少なくとも一方が、前記芯金を一体的に有する樹脂の射出成形品であることを特徴とする導波管スロットアンテナ。
A waveguide made of resin having a waveguide extending in the tube axis direction, and a defined surface of the waveguide covered with a conductive coating, and provided at predetermined intervals along the tube axis direction of the waveguide A waveguide slot antenna comprising a plurality of radiating slots, wherein the waveguide has an end-shaped cross section at each portion in the extending direction of the waveguide and is coupled to the other side. And comprising the first and second waveguide forming members that define the waveguide,
A cored bar arranged along the tube axis direction, the cored bar being held by both the first and second waveguide forming members ;
A waveguide slot antenna , wherein at least one of the first and second waveguide forming members is a resin injection-molded product integrally including the cored bar .
管軸方向に延びた導波路を有し、該導波路の画成面が導電性被膜で被覆された樹脂製の導波管と、該導波管の管軸方向に沿って所定間隔で設けられた複数の放射スロットとを備えた導波管スロットアンテナであって、前記導波管が、前記導波路の延在方向各部における横断面が有端状をなし、相手側と結合されることで前記導波路を画成する第1および第2の導波管形成部材からなるものにおいて、
前記管軸方向に沿って配置された芯金を有し、該芯金が、前記第1および第2の導波管形成部材の双方に保持されており、
前記芯金は、第1の芯金と第2の芯金の結合体からなり、
前記第1の導波管形成部材が、前記第1の芯金を一体的に有する樹脂の射出成形品であり、前記第2の導波管形成部材が、前記第2の芯金を一体的に有する樹脂の射出成形品であることを特徴とする導波管スロットアンテナ。
A waveguide made of resin having a waveguide extending in the tube axis direction, and a defined surface of the waveguide covered with a conductive coating, and provided at predetermined intervals along the tube axis direction of the waveguide A waveguide slot antenna comprising a plurality of radiating slots, wherein the waveguide has an end-shaped cross section at each portion in the extending direction of the waveguide and is coupled to the other side. And comprising the first and second waveguide forming members that define the waveguide,
A cored bar arranged along the tube axis direction, the cored bar being held by both the first and second waveguide forming members;
The metal core is composed of a combination of a first metal core and a second metal core,
The first waveguide forming member is a resin injection-molded product integrally including the first core metal, and the second waveguide forming member is integrated with the second core metal. A waveguide slot antenna, which is an injection molded product of resin .
前記芯金の一部が、前記導波管の外表面に露出している請求項1又は2に記載の導波管スロットアンテナ。 The waveguide slot antenna according to claim 1 or 2 , wherein a part of the cored bar is exposed on an outer surface of the waveguide. 前記第1および第2の導波管形成部材は、何れも、前記横断面が凹形状をなす請求項1〜の何れか一項に記載の導波管スロットアンテナ。 The waveguide slot antenna according to any one of claims 1 to 3 , wherein each of the first and second waveguide forming members has a concave cross section.
JP2015185040A 2015-09-18 2015-09-18 Waveguide slot antenna Expired - Fee Related JP6557566B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2015185040A JP6557566B2 (en) 2015-09-18 2015-09-18 Waveguide slot antenna
US15/754,682 US10355364B2 (en) 2015-09-18 2016-08-31 Waveguide slot antenna and method for producing same
CN201680053629.XA CN108028467A (en) 2015-09-18 2016-08-31 Waveguide slot antenna and its manufacture method
EP16846252.1A EP3352302A4 (en) 2015-09-18 2016-08-31 Waveguide slot antenna and method for producing same
PCT/JP2016/075405 WO2017047381A1 (en) 2015-09-18 2016-08-31 Waveguide slot antenna and method for producing same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2015185040A JP6557566B2 (en) 2015-09-18 2015-09-18 Waveguide slot antenna

Publications (2)

Publication Number Publication Date
JP2017060086A JP2017060086A (en) 2017-03-23
JP6557566B2 true JP6557566B2 (en) 2019-08-07

Family

ID=58390691

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2015185040A Expired - Fee Related JP6557566B2 (en) 2015-09-18 2015-09-18 Waveguide slot antenna

Country Status (1)

Country Link
JP (1) JP6557566B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019008963A1 (en) * 2017-07-07 2019-01-10 日本電気株式会社 Power feeding circuit, antenna, and method for configuring antenna

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001308611A (en) * 2000-04-25 2001-11-02 Kojima Press Co Ltd Waveguide antenna
JP2004120044A (en) * 2002-09-24 2004-04-15 Mitsubishi Electric Corp Waveguide
JP4140830B2 (en) * 2003-04-02 2008-08-27 三菱電機株式会社 Waveguide
JP6207887B2 (en) * 2012-08-23 2017-10-04 Ntn株式会社 Waveguide slot antenna and radio apparatus including the same

Also Published As

Publication number Publication date
JP2017060086A (en) 2017-03-23

Similar Documents

Publication Publication Date Title
WO2017047381A1 (en) Waveguide slot antenna and method for producing same
WO2014030488A1 (en) Waveguide tube slot antenna and wireless device provided therewith
US11196171B2 (en) Combined waveguide and antenna structures and related sensor assemblies
JP5686927B2 (en) Waveguide slot array antenna device
KR102307953B1 (en) Broadband waveguide launch design on single layer PCB
JP6207887B2 (en) Waveguide slot antenna and radio apparatus including the same
WO2017136098A1 (en) Iris matched pcb to waveguide transition
US20120287559A1 (en) Communication terminal and method of manufacturing the same
CN113169451A (en) Electromagnetic device
JP2001326506A (en) Array antenna
JP6557566B2 (en) Waveguide slot antenna
JP6537943B2 (en) Waveguide slot antenna and method of manufacturing the same
JP6211254B2 (en) Waveguide slot array antenna
KR101070038B1 (en) Antenna pattern frame, mold for manufacturing the same and case of electronic device
KR20110094725A (en) Antenna pattern frame, electronic device provided with antenna pattern frame and method for manufacturing electronic device
JP6615570B2 (en) Waveguide slot antenna
WO2014203859A1 (en) Waveguide slot antenna and warning system using same
EP3970229B1 (en) Apparatus radiating and receiving microwaves, radar apparatus comprising such an apparatus, and method for assembling such an apparatus
JP7299472B2 (en) Card connector and its manufacturing method
JP2013243530A (en) Waveguide and high-frequency module using the same
CN107978845B (en) Integrated radiating unit structure
US20190305434A1 (en) Connection Arrangement
US8446233B2 (en) Waveguide, antenna and vehicular radar apparatus
US12142806B2 (en) Apparatus radiating and receiving microwaves, radar apparatus comprising such an apparatus, and method for assembling such an apparatus
JPH11266101A (en) Waveguide

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20180827

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20190426

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20190614

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20190627

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20190712

R150 Certificate of patent or registration of utility model

Ref document number: 6557566

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

LAPS Cancellation because of no payment of annual fees