JPH0420103A - Planar antenna - Google Patents
Planar antennaInfo
- Publication number
- JPH0420103A JPH0420103A JP12508790A JP12508790A JPH0420103A JP H0420103 A JPH0420103 A JP H0420103A JP 12508790 A JP12508790 A JP 12508790A JP 12508790 A JP12508790 A JP 12508790A JP H0420103 A JPH0420103 A JP H0420103A
- Authority
- JP
- Japan
- Prior art keywords
- circuit board
- conductor plate
- ground conductor
- power supply
- supply circuit
- 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.)
- Pending
Links
- 239000004020 conductor Substances 0.000 claims abstract description 43
- 230000010355 oscillation Effects 0.000 claims abstract description 9
- 230000005855 radiation Effects 0.000 claims description 17
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000758 substrate Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Description
本発明は、衛星放送の受信や衛星通信に用いられる平面
アンテナに関するものである。The present invention relates to a flat antenna used for satellite broadcast reception and satellite communications.
従来より、衛星放送受信用などとして平面アンテナが用
いられている。この種の平面アンテナは、第４図に示す
ように、電波を受信するアンテナ本体１と、アンテナ本
体１で受信した受信信号を周波数変換する低ノイズブロ
ックダウンコンバータ２（以下、ＬＮＢと略称する）と
を備えているのが普通であって、ＬＮＢ２はアンテナ本
体１に外付されたシールドケースに納装されている（特
願昭６２−２７１０６３号など）、受信信号はアンテナ
本体１ではストリップラインを伝送され、アンテナ本体
１とＬＮＢ２との間では同軸線路や導波管を介して伝送
される。2. Description of the Related Art Conventionally, flat antennas have been used for receiving satellite broadcasts. As shown in FIG. 4, this type of planar antenna includes an antenna body 1 that receives radio waves, and a low noise block down converter 2 (hereinafter abbreviated as LNB) that converts the frequency of the received signal received by the antenna body 1. Usually, the LNB2 is housed in a shield case attached to the antenna body 1 (Japanese Patent Application No. 62-271063, etc.), and the received signal is transmitted through the strip line in the antenna body 1. The signal is transmitted between the antenna body 1 and the LNB 2 via a coaxial line or a waveguide.
上記構成では、ＬＮＢ２がアンテナ本体１の裏面に外付
されており、ＬＮＢ２は薄型のものでも２０〜３０ｗｗ
程度の厚みを有しているから（アンテナ本体は１０ｉｖ
程度以下に形成できる）、全体としての厚みが大きくな
り、薄型の平面アンテナを構成することができないとい
う問題が生じる。
また、アンテナ本体１とＬＮＢ２との接続部に同軸線路
や導波管を用いているから、この接続部での伝送損失が
大きくなるという問題がある。
このような問題を解決するものとして、特開平２−４４
９０３号公報に示されているもののように、アンテナ本
体内にＬＮＢを納装したものが考えられているが、上述
したように、ＬＮＢは比較的厚みが大きいから、このよ
うな構成では、アンテナ本体の厚みが大きくなり、薄型
の平面アンテナが形成できないことになる。
本発明は上記問題点の解決を目的とするものであり、全
体を薄型化した平面アンテナを提供しようとするもので
ある。In the above configuration, the LNB2 is externally attached to the back of the antenna body 1, and even a thin LNB2 has a weight of 20 to 30 ww.
(the antenna body is 10iv)
However, the problem arises that the overall thickness increases, making it impossible to construct a thin planar antenna. Furthermore, since a coaxial line or a waveguide is used at the connection between the antenna body 1 and the LNB 2, there is a problem in that transmission loss at this connection increases. As a solution to such problems, Japanese Patent Application Laid-Open No. 2-44
It has been considered that the LNB is housed inside the antenna body, as shown in Publication No. 903, but as mentioned above, the LNB is relatively thick, so in such a configuration, the antenna This increases the thickness of the main body, making it impossible to form a thin planar antenna. The present invention aims to solve the above-mentioned problems and provides a planar antenna whose overall thickness is reduced.
請求項１の構成では、上記目的を達成するために、接地
導体板と、給電回路パターンが形成された給電回路板と
、放射回路パターンが形成された放射回路板とをそれぞ
れ適宜離間させて順に積層してなるアンテナ本体を有し
、ミキサと局部発振回路とからなる低ノイズブロックダ
ウンコンバータを給電回路板上に配設し、局部発振回路
の出力周波数を決定する共振器を、共振用素子と、共振
用素子の周囲に形成される共振用キャビティとにより楕
成し、共振用キャビティの周壁の少なくとも一部を、接
地導体板に対して給電回路板とは反対側に突出させてい
るのである。
請求項２の構成では、共振用キャビティを、接地導体板
の一部を給電回路板とは反対側に凹没させた凹所として
いる。
請求項３の構成では、接地導体板の一部を給電回路板側
に突出させて先端縁が給電回路板の一面に当接する環状
の突部を形成し、突部に囲まれた部位において接地導体
板の一部を給電回路板とは反対側に凹没させた凹所を共
振用キャビティとしているのである。
請求項４の構成では、接地導体板の一部を給電回路板側
に突出させて先端面が開口し先端縁が給電回路板の一面
に当接する筒体を形成し、給電回路板とは反対側に突出
する形で筒体の開口を閉塞するキャップを接地導体板に
装着し、筒体とキャップとに囲まれた空間を共振用キャ
ビティとしているのである。In the structure of claim 1, in order to achieve the above object, a ground conductor plate, a feed circuit board on which a feed circuit pattern is formed, and a radiation circuit board on which a radiation circuit pattern is formed are arranged in order with appropriate distance from each other. It has a multilayer antenna body, and a low-noise block down converter consisting of a mixer and a local oscillation circuit is arranged on the feeding circuit board, and a resonator that determines the output frequency of the local oscillation circuit is used as a resonance element. , and a resonant cavity formed around the resonant element, forming an ellipse, and at least a part of the peripheral wall of the resonant cavity protrudes from the ground conductor plate on the opposite side of the power supply circuit board. . In the second aspect of the present invention, the resonance cavity is a recess formed by recessing a part of the ground conductor plate on the side opposite to the power supply circuit board. In the structure of claim 3, a part of the grounding conductor plate is made to protrude toward the power supply circuit board side to form an annular protrusion whose tip end abuts one surface of the power supply circuit board, and a portion surrounded by the protrusion is grounded. The resonance cavity is formed by recessing a portion of the conductor plate on the side opposite to the power supply circuit board. In the structure of claim 4, a part of the grounding conductor plate is made to protrude toward the power supply circuit board to form a cylindrical body whose tip end surface is open and whose end edge abuts one surface of the power supply circuit board, and which is opposite to the power supply circuit board. A cap that protrudes to the side and closes the opening of the cylinder is attached to the ground conductor plate, and the space surrounded by the cylinder and the cap is used as a resonance cavity.
請求項１の構成によれば、低ノイズブロックダウンコン
バータ（ＬＮＢ）を給電回路板上に配設し、局部発振回
路の出力周波数を決定する共振器を、共振用素子と、共
振用素子のＦ［に形成される共振用キャビティとにより
構成し、共振用キャビティの周壁の少なくとも一部を、
接地導体板に対して給電回路板とは反対側に突出させて
いるので、給電回路板とＬＮＢとの間の接続に同軸線路
や導波管を用いる必要がなく、伝送損失が少なくなるの
である。ｉた、共振器の大部分をアンテナ本体内に納装
し、共振用キャビティの一部を接地導体板から突出させ
ているので、従来に比較すれば全体的に薄型化が可能に
なるのである。
請求項２の構成によれば、接地導体板の一部に形成しな
凹所を共振用キャビティとしているので、共振器用に別
のゲースを設ける必要がなく、コストの低減につながる
のである。
請求項３の構成によれば、ｔ′＃地導体板に形成した環
状の突部の先端縁を給電回路板に当接させているから、
共振用キャビティの大部分を接地導体板によって囲むこ
とができ、共振器からの不要輻射を防止することができ
、しかも、給電回路板を接地導体板によって支持するこ
とができる。
請求項４の構成によれば、請求項３の構成と同様に、共
振器からの不要輻射を防止できるのである。According to the configuration of claim 1, a low noise block down converter (LNB) is disposed on the power supply circuit board, and a resonator that determines the output frequency of the local oscillation circuit is connected to a resonance element and an F of the resonance element. a resonant cavity formed in [, at least a part of the peripheral wall of the resonant cavity,
Since it protrudes from the ground conductor plate on the opposite side of the feeder circuit board, there is no need to use a coaxial line or waveguide for connection between the feeder circuit board and the LNB, reducing transmission loss. . In addition, most of the resonator is housed within the antenna body, and a portion of the resonant cavity protrudes from the ground conductor plate, making it possible to make the overall structure thinner than conventional antennas. . According to the second aspect of the present invention, since the recess formed in a part of the ground conductor plate is used as the resonant cavity, there is no need to provide a separate gate for the resonator, leading to cost reduction. According to the structure of claim 3, since the tip edge of the annular protrusion formed on the t'# ground conductor plate is brought into contact with the power supply circuit board,
Most of the resonant cavity can be surrounded by the ground conductor plate, thereby preventing unnecessary radiation from the resonator, and furthermore, the feeding circuit board can be supported by the ground conductor plate. According to the configuration of claim 4, like the configuration of claim 3, unnecessary radiation from the resonator can be prevented.
【実施例１】
第１図に示すように、アンテナ本体１は、接地導体板３
と、絶縁基板上に給電回路パターンが形成された給電回
路板４と、絶縁基板上に放射回路パターンが形成された
放射回路板５とを順に積層して構成される。接地導体板
３と給電回路板４、給電回路板４と放射回路板らとの間
はそれぞれ容量結合される程度の適宜間隔で離間してい
る。また、放射回路板５の表面側にはレドーム６が配置
される。給電回路板４の上には、ＬＮＢ２が実装された
回路基板７が配設され、接地導体板３と放射回路板５と
の間の空間において回路基板７はシールドケース８に囲
まれている。ＬＮＢ２の出力は接地導体板３に取り付け
られたコネクタ９を介して外部に取り出される。ＬＮＢ
２は、ミキサ、局部発振回路、増幅回路などを備えてお
り、局部発振回路の出力周波数は共振器１０により・て
決定される。
共振器１０は、誘電体共振器よりなる共振用素子１１と
、共振用素子１１の周囲の共振用キャビティ１２とによ
り構成されているのであって、共振用キャビティ１２は
、接地導体板３の一部を共振用素子１１に対応する部位
で凹没させた凹所１３により形成されている。すなわち
、接地導体板３は、一部がアンテナ本体１の外側に突出
した形に形成されるのである。凹所１３の底面には周波
数調節用ねじ１４が螺入され、周波数調節用ねじ１４の
先端は共振用素子１１に対向する。この周波数調節用ね
じ１４を共振用素子１１に対して進退させれば、共振器
１０の共振周波数を調節することができるのである。
共振器１０を上述のように構成したことにより、共振用
キャビティ１２の一部をアンテナ本体１内の空間とし、
残りを接地導体板３に形成した凹所１３の内部空間とす
ることができ、アンテナ本体１の厚み寸法を増すことな
く、しかも、アンテナ本体ｌからの突出部分の突出量を
大きくすることなく共振器１０を設けることができるの
である。
その結果、従来構成に比較すれば、全体に厚みの小さい
平面アンテナを提供できるのである。ここに、ＬＮＢ２
を実装する回路基板７を設けずに給電回路板４にＬＮＢ
２を実装してもよい。[Embodiment 1] As shown in FIG. 1, the antenna body 1 includes a ground conductor plate 3
A power supply circuit board 4 having a power supply circuit pattern formed on an insulating substrate, and a radiation circuit board 5 having a radiation circuit pattern formed on an insulating substrate are laminated in this order. The ground conductor plate 3 and the feeding circuit board 4, and the feeding circuit board 4 and the radiation circuit board are spaced apart from each other at appropriate intervals to ensure capacitive coupling. Further, a radome 6 is arranged on the front side of the radiation circuit board 5. A circuit board 7 on which the LNB 2 is mounted is disposed on the power supply circuit board 4, and the circuit board 7 is surrounded by a shield case 8 in a space between the ground conductor board 3 and the radiation circuit board 5. The output of the LNB 2 is taken out to the outside via a connector 9 attached to the ground conductor plate 3. LNB
2 includes a mixer, a local oscillation circuit, an amplifier circuit, etc., and the output frequency of the local oscillation circuit is determined by the resonator 10. The resonator 10 is composed of a resonant element 11 made of a dielectric resonator and a resonant cavity 12 surrounding the resonant element 11. It is formed by a recess 13 that is recessed at a portion corresponding to the resonance element 11 . That is, the ground conductor plate 3 is formed so that a portion thereof protrudes outside the antenna body 1. A frequency adjustment screw 14 is screwed into the bottom of the recess 13, and the tip of the frequency adjustment screw 14 faces the resonance element 11. By moving this frequency adjustment screw 14 forward and backward relative to the resonance element 11, the resonance frequency of the resonator 10 can be adjusted. By configuring the resonator 10 as described above, a part of the resonance cavity 12 is a space inside the antenna body 1,
The remaining space can be used as the internal space of the recess 13 formed in the ground conductor plate 3, and resonance can be achieved without increasing the thickness of the antenna body 1 or increasing the amount of protrusion of the protruding portion from the antenna body l. Therefore, the container 10 can be provided. As a result, it is possible to provide a planar antenna with a smaller overall thickness than the conventional configuration. Here, LNB2
The LNB is mounted on the power supply circuit board 4 without providing the circuit board 7 on which the LNB is mounted.
2 may be implemented.
【実施例２】
本実施例では、第２図に示すように、接地導体板３の一
部に環状の突部１５を形成し、突部１５に囲まれた部位
に凹所１３を形成している。突部１５の先端縁は給電回
路板４に当接するように寸法が設定され、給電回路板４
を挟んで突部１５の先端縁に対向するように金属板であ
る押え板１６が配設される。凹所１３が形成されている
部位がアンテナ本体１の裏面側に突出する点は実施例１
と同様である。また、凹所１３の内部空間が共振用キャ
ビテ不１２となるのである。押え板１６は突部１５に対
応する部位で接地導体板３を通して螺入される取−付ね
じ１７によって接地導体板３に固定される。また、ＬＮ
Ｂ２は給電回路板４に実装され、共振用素子１１は押え
板１６に取り付けられる。
この構成によれば、共振用素子１１の周囲が凹所１３の
周壁に囲まれるから、共振器１０からの不要輻射が低減
できるのである。また、押え板１６が存在することによ
って不要輻射が一層低減されている。さらに、突部１５
が給電回路板４の一面に当接し、かつ押え板１６との間
に給電回路板４を挟装しているから、給電回路板４が接
地導体板３によって支持されることになり、接地導体板
３と給電回路板４との間隔分保つための支持体を少なく
して部品点数を削減でき、しかも支持強度を高くするこ
とができる。[Embodiment 2] In this embodiment, as shown in FIG. 2, an annular protrusion 15 is formed in a part of the ground conductor plate 3, and a recess 13 is formed in a region surrounded by the protrusion 15. ing. The tip edge of the protrusion 15 is dimensioned so as to come into contact with the power supply circuit board 4, and
A presser plate 16, which is a metal plate, is disposed so as to face the tip edge of the protrusion 15 with the protrusion 15 in between. The point that the part where the recess 13 is formed protrudes toward the back side of the antenna body 1 is that in Example 1.
It is similar to Moreover, the internal space of the recess 13 becomes a cavity 12 for resonance. The holding plate 16 is fixed to the ground conductor plate 3 by a mounting screw 17 screwed through the ground conductor plate 3 at a portion corresponding to the protrusion 15 . Also, LN
B2 is mounted on the power supply circuit board 4, and the resonance element 11 is attached to the holding plate 16. According to this configuration, since the resonant element 11 is surrounded by the peripheral wall of the recess 13, unnecessary radiation from the resonator 10 can be reduced. Furthermore, the presence of the presser plate 16 further reduces unnecessary radiation. Furthermore, the protrusion 15
Since the power supply circuit board 4 is in contact with one surface of the power supply circuit board 4 and the power supply circuit board 4 is sandwiched between it and the holding plate 16, the power supply circuit board 4 is supported by the ground conductor plate 3, and the ground conductor The number of parts can be reduced by reducing the number of supports for maintaining the distance between the board 3 and the power supply circuit board 4, and the support strength can be increased.
【実施例３】
本実施例は、第３図に示すように、接地導体板３の一部
に先端面が開口した筒体１８を形成し、筒体１８の先端
縁を給電回路板４に当接させ、筒体１８に対応する部位
で接地導体板３の下面にキャップ１９を装着した構成を
有している。キャップ１９はアンテナ本体１の下面側に
突出する形状に形成され、キャップ１９の底面内側に共
振用素子１１が配設される。したがって、筒体１８の内
部空間とキャップ１９の内部空間とが共振用キャビティ
１２になるのである。ＬＮＢ２を構成する素子は給電回
路板４の上に実装される。
この構成によれば、共振用素子１１の周囲の大部分が筒
体１８の周壁とキャップ１９の周壁とによって囲まれる
から、不要輻射が低減するのである。また、筒体１８の
先端縁による給電回路板４の支持もなされる。さらに、
キャップ１９の内部に共振用素子１１が配設されている
から、キヤ・ｙプ１９の取付位置を調節すれば共振器１
ｏの共振側波数を変化させることができる。[Embodiment 3] In this embodiment, as shown in FIG. 3, a cylindrical body 18 with an open end surface is formed in a part of the ground conductor plate 3, and the distal end edge of the cylindrical body 18 is connected to the power supply circuit board 4. A cap 19 is attached to the lower surface of the ground conductor plate 3 at a portion corresponding to the cylindrical body 18. The cap 19 is formed in a shape that protrudes toward the bottom surface of the antenna body 1, and the resonance element 11 is disposed inside the bottom surface of the cap 19. Therefore, the internal space of the cylindrical body 18 and the internal space of the cap 19 become the resonance cavity 12. Elements constituting LNB 2 are mounted on power supply circuit board 4 . According to this configuration, most of the periphery of the resonance element 11 is surrounded by the circumferential wall of the cylinder 18 and the circumferential wall of the cap 19, so that unnecessary radiation is reduced. Further, the feeding circuit board 4 is also supported by the tip edge of the cylinder 18. moreover,
Since the resonance element 11 is disposed inside the cap 19, the resonator 1 can be adjusted by adjusting the mounting position of the cap 19.
The resonance side wave number of o can be changed.
上述のように、請求項１の構成では、低ノイズブロック
ダウンコンバータ（ＬＮＢ）を給電回路板上に配設し、
局部発振回路の出力周波数を決定する共振器を、共振用
素子と、共振用素子の周囲に形成される共振用キャビテ
ィとにより構成し、共振用キャビティの周壁の少なくと
も一部を、接地導体板に対して給、電回路板とは反対側
に突出させているので、給電回路板とＬＮＢとの間の接
続に同軸線路や導波管を用いる必要がなく、伝送損失が
少なくなって高感度になるという利点がある。
また、共振器の大部分をアンテナ本体内に納装し、共振
用キャビティの一部を接地導体板から突出させているの
で、従来に比較すれば全体的に薄型化が可能になるとい
う効果を奏する。
請求項２の構成によれば、接地導体板の一部に形成した
凹所を共振用キャビティとしているので、共振器用に別
のケースを設ける必要がなく、コストの低減につながる
という利点がある。
請求項３の構成によれば、接地導体板に形成した環状の
突部の先端縁を給電回路板に当接させているから、共振
用キャビティの大部分を接地導体板によって囲むことが
でき、共振器からの不要輻射を防止することができ、し
かも、給電回路板を接地導体板によって支持することが
できるという効果を奏する。
請求項４の構成によれば、共振用キャビティを筒体とキ
ャップとによって囲むことができるから、共振器からの
不要輻射を防止できるのである。As described above, in the configuration of claim 1, a low noise block down converter (LNB) is arranged on the power supply circuit board,
A resonator that determines the output frequency of the local oscillation circuit is constituted by a resonant element and a resonant cavity formed around the resonant element, and at least a part of the peripheral wall of the resonant cavity is connected to a ground conductor plate. Since the feeding circuit board and the LNB protrude on the opposite side, there is no need to use a coaxial line or waveguide for connection between the feeding circuit board and the LNB, reducing transmission loss and increasing sensitivity. It has the advantage of being In addition, most of the resonator is housed within the antenna body, and a portion of the resonant cavity protrudes from the ground conductor plate, which has the effect of making the overall thickness thinner than conventional methods. play. According to the second aspect of the present invention, since the recess formed in a part of the ground conductor plate is used as a resonant cavity, there is no need to provide a separate case for the resonator, which is advantageous in that it leads to cost reduction. According to the configuration of claim 3, since the tip edge of the annular protrusion formed on the ground conductor plate is brought into contact with the power supply circuit board, most of the resonance cavity can be surrounded by the ground conductor plate, This has the advantage that unnecessary radiation from the resonator can be prevented, and the power supply circuit board can be supported by the ground conductor board. According to the configuration of claim 4, since the resonance cavity can be surrounded by the cylinder and the cap, unnecessary radiation from the resonator can be prevented.
第１図は本発明の実施例１を示す要部断面図、第２図は
本発明の実施例２を示す要部断面図、第３図は本発明の
実施例３を示す要部断面図、第４図は従来例を示す要部
側面図である。
１・・・アンテナ本体、２・・・低ノイズブロックダウ
ンコンバータ、３・・・接地導体板、４・・・給電回路
板、５・・・放射回路板、１０・・・共振器、１１・・
−共振用素子、１２・・・共振用キャビティ、１３・・
・凹所、１５・・・突部、１８〜・・筒体、１９・・・
キャップ。
代理人 弁理士 石 １）長 七Fig. 1 is a sectional view of a main part showing a first embodiment of the present invention, Fig. 2 is a sectional view of a main part showing a second embodiment of the invention, and Fig. 3 is a sectional view of a main part showing a third embodiment of the invention. , FIG. 4 is a side view of main parts showing a conventional example. DESCRIPTION OF SYMBOLS 1... Antenna body, 2... Low noise block down converter, 3... Ground conductor plate, 4... Feeding circuit board, 5... Radiation circuit board, 10... Resonator, 11...・
- Resonance element, 12... Resonance cavity, 13...
・Recess, 15...Protrusion, 18~...Cylinder, 19...
cap. Agent Patent Attorney Ishi 1) Choshichi
Claims (4)
電回路板と、放射回路パターンが形成された放射回路板
とをそれぞれ適宜離間させて順に積層してなるアンテナ
本体を有し、ミキサと局部発振回路とからなる低ノイズ
ブロックダウンコンバータを給電回路板上に配設し、局
部発振回路の出力周波数を決定する共振器を、共振用素
子と、共振用素子の周囲に形成される共振用キャビティ
とにより構成し、共振用キャビティの周壁の少なくとも
一部を、接地導体板に対して給電回路板とは反対側に突
出させたことを特徴とする平面アンテナ。(1) It has an antenna body in which a ground conductor plate, a feeding circuit board on which a feeding circuit pattern is formed, and a radiation circuit board on which a radiation circuit pattern is formed are laminated in order with appropriate spacing, and a mixer and A low-noise block down converter consisting of a local oscillation circuit is installed on the power supply circuit board, and a resonator that determines the output frequency of the local oscillation circuit is connected to a resonance element and a resonance element formed around the resonance element. What is claimed is: 1. A planar antenna comprising a cavity, wherein at least a part of a peripheral wall of the resonant cavity projects toward a side opposite to a feeding circuit board with respect to a ground conductor plate.
路板とは反対側に凹没させた凹所であることを特徴とす
る請求項１記載の平面アンテナ。(2) The planar antenna according to claim 1, wherein the resonance cavity is a recess formed by recessing a part of the ground conductor plate on the side opposite to the feeding circuit board.
端縁が給電回路板の一面に当接する環状の突部を形成し
、突部に囲まれた部位において接地導体板の一部を給電
回路板とは反対側に凹没させた凹所を共振用キャビティ
とすることを特徴とする請求項１記載の平面アンテナ。(3) A part of the grounding conductor plate is made to protrude toward the power supply circuit board side to form an annular protrusion whose tip edge contacts one side of the power supply circuit board, and a part of the grounding conductor plate is formed at a portion surrounded by the protrusion. 2. The planar antenna according to claim 1, wherein a recess formed by recessing the portion on the side opposite to the feeding circuit board serves as a resonance cavity.
端面が開口し先端縁が給電回路板の一面に当接する筒体
を形成し、給電回路板とは反対側に突出する形で筒体の
開口を閉塞するキャップを接地導体板に装着し、筒体と
キャップとに囲まれた空間を共振用キャビティとするこ
とを特徴とする請求項１記載の平面アンテナ。(4) A part of the ground conductor plate is protruded toward the power supply circuit board to form a cylindrical body with an open end surface and a tip edge in contact with one surface of the power supply circuit board, and protrudes on the opposite side from the power supply circuit board. 2. The planar antenna according to claim 1, wherein a cap that closes the opening of the cylindrical body is attached to the ground conductor plate, and a space surrounded by the cylindrical body and the cap is used as a resonance cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12508790A JPH0420103A (en) | 1990-05-15 | 1990-05-15 | Planar antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12508790A JPH0420103A (en) | 1990-05-15 | 1990-05-15 | Planar antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0420103A true JPH0420103A (en) | 1992-01-23 |
Family
ID=14901517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12508790A Pending JPH0420103A (en) | 1990-05-15 | 1990-05-15 | Planar antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0420103A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10118294B2 (en) | 2015-11-30 | 2018-11-06 | Omron Corporation | Control device, control method and non-transitory recording medium |
-
1990
- 1990-05-15 JP JP12508790A patent/JPH0420103A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10118294B2 (en) | 2015-11-30 | 2018-11-06 | Omron Corporation | Control device, control method and non-transitory recording medium |
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