JP3747753B2

JP3747753B2 - Switching distributor

Info

Publication number: JP3747753B2
Application number: JP2000248971A
Authority: JP
Inventors: 耕一郎杭; 正彦天野; 幹生小松; 博司畑野
Original assignee: Matsushita Electric Works Ltd
Current assignee: Panasonic Electric Works Co Ltd
Priority date: 2000-08-18
Filing date: 2000-08-18
Publication date: 2006-02-22
Anticipated expiration: 2020-08-18
Also published as: JP2002064394A

Description

【０００１】
【発明の属する技術分野】
本発明は、アンテナからの複数系統の受信信号を複数台の受信端末に分配するとともに、各受信端末において所望系統の受信信号を選択して受信する切換分配器に関するものである。
【０００２】
【従来の技術】
従来から、垂直偏波と水平偏波或いは右旋円偏波と左旋円偏波というように互いに直交する２種類の偏波を用いて異なる情報を伝送する技術が人工衛星を利用する通信分野において知られている。例えば、衛星放送に用いられている通信衛星では、垂直偏波と水平偏波とを用いている。送信された電波を受信する衛星受信アンテナ（所謂、ＣＳアンテナ）は、各通信衛星からの垂直偏波信号および水平偏波信号を夫々受信し、各偏波信号を夫々所定周波数帯の受信信号に変換し出力する。
【０００３】
したがって、ＣＳアンテナからの各受信信号を受信する受信端末を用い、１つのＣＳアンテナからケーブルを介して受信端末へ各受信信号を伝送する場合は、ＣＳアンテナの垂直偏波および水平偏波に夫々対応した出力端子部に夫々１本ずつのケーブルを接続し、合計２本のケーブルを受信端末まで配線することになる。また、複数台の受信端末で共聴しようとすれば、１つのＣＳアンテナから引き出した２本のケーブルと各受信端末との間に夫々分配器を設け、ＣＳアンテナからの各受信信号を各受信端末へ分配する必要がある。
【０００４】
【発明が解決しようとする課題】
上述の説明から明らかなように、複数系統のＣＳ放送サービスを複数の部屋で利用するには、各受信端末が設置される部屋ごとに受信信号を取出すための複数個の取出口が夫々必要となる。したがって、分配器とＣＳアンテナとを接続するだけでなく、分配器と各取出口との間も夫々ケーブルで接続する必要があり、屋内配線工事が極めて面倒になる。
【０００５】
また、通信衛星からの受信信号を受信するために受信端末の前段には一般にＣＳチューナを設けるが、ＣＳチューナは、各ＣＳアンテナからそのまま複数系統の受信信号を一括して受信し、受信信号の系統を択一的に選択して受信端末側に出力する機能を備えていないから、ＣＳチューナに入力する受信信号の系統を切換える切換器を別に設けなければならない。
【０００６】
これに対して、複数の入力端子部および複数の出力端子部を１つの筐体に設け、各入力端子部から入力される複数系統の受信信号を複数に分配する分配回路部と、すべての分配回路部から１つの分配回路部の出力を夫々選択して出力端子部に出力する複数の切換器とを上記筐体に設けた切換分配器が考えられる。しかし、複数の入力端子部と複数の出力端子部とを筐体に単純に並設するだけでは筐体が大型化して取付面積が大きくなるという問題が生じる。
【０００７】
本発明は上記問題に鑑みて為されたものであり、その目的は、複数系統の受信信号を択一的に選択して１つの出力端子部から出力可能とすることにより、屋内配線工事を容易にし、かつ分配器とは別に切換器を設ける必要がなく、しかも取付面積を比較的小さくした切換分配器を提供することにある。
【０００８】
【課題を解決するための手段】
請求項１の発明は、複数系統の受信信号がそれぞれ入力される複数個の入力端子部と、衛星からの電波を受信処理する複数台の受信端末がそれぞれ接続される複数個の出力端子部と、各入力端子部からの受信信号をそれぞれ分配する複数個の分配回路と、分配回路と同数個設けられそれぞれ前記受信端末からの指示に応じてすべての分配回路から１つの分配回路の出力を選択する切換回路とを金属製の一つの筐体に備え、前記筐体が施工面に当接する形で取り付けられ、前記入力端子部および前記出力端子部はそれぞれ筐体の外側面のうち施工面に当接する面とは直交する面であって互いに異なる面に配設され、入力端子部が配設される面は施工面から離れる向きに段差を設けた階段面であって各階段面にそれぞれ入力端子部が設けられ、出力端子部が配設される面は入力端子部が配設される階段面とは別に施工面から離れる向きに段差を設けた階段面であって各階段面にそれぞれ出力端子部が設けられ、前記入力端子部および前記出力端子部はそれぞれ施工面に直交する方向において異なる２群の位置に分かれ、各群の前記入力端子部および前記出力端子部が各々接続され施工面に沿って２層に配置された第１および第２の印刷配線板から成る回路基板と、第１の回路基板と第２の回路基板との間に両回路基板と直交する形で配置されかつ両回路基板に電気的に接続される印刷配線板から成る第３の回路基板とが設けられ、第１および第２の回路基板は施工面に沿って配置され、かつ第１および第２の回路基板のうち施工面に近い回路基板は施工面に近接して配置され、前記入力端子部および前記出力端子部は同軸コネクタであって、第１および第２の回路基板のうち施工面に近い回路基板と接続された前記入力端子部および前記出力端子部は施工面に沿う部分と施工面側に延設されて回路基板に直交し回路基板に接続される部分とから成るＬ字状接続端子を芯線部として備え、Ｌ字状接続端子のうち回路基板に直交する部位の両側に隣接する形で、回路基板の接地パターンと導通している導電性を有した突起部を配設しているものであり、各出力端子部と各受信端末側とを夫々１本のケーブルで接続するだけで、複数系統の受信信号を複数の受信端末側で夫々択一的に選択して受信できるようになる。その結果、屋内配線工事が容易になり、また別途に切換器を設ける必要もないのである。しかも、入力端子部と出力端子部とが夫々施工面に直交する方向において２群の位置に分かれているから、入力端子部および出力端子部を夫々配置している範囲の施工面への投影面積を比較的小さくすることができ、結果的に取付面積が小さくなる。さらに、回路部品を各回路基板に分散させて実装することができ、取付面積を小さくすることができる。また、第１および第２の回路基板のうち施工面に近い回路基板と接続された前記入力端子部および前記出力端子部はＬ字状接続端子を芯線部として備えており、第１および第２の回路基板のうち施工面に近い回路基板を施工面に近接できるから、第３の回路基板の面積をより大きくすることが可能となり、第３の回路基板に実装可能な回路部品数を多くして第１の回路基板および第２の回路基板の回路部品数を低減することができ、結果的に取付面積を小さくすることができる。さらにまた、Ｌ字状接続端子のうち回路基板に直交する部位の両側に隣接する形で、接地パターンと導通している導電性を有した突起部を配設しているから、Ｌ字状接続端子の周囲に安定した電磁界状態を確保できる。
【００１０】
請求項２の発明は、請求項１において、前記第１の回路基板の接地パターンと前記第２の回路基板の接地パターンと前記筐体との少なくとも１つと、前記第３の回路基板の接地パターンとを接続する接続部材を備えるものであり、各接地パターンを介して受信信号が漏洩するのを抑制できる。
【００１１】
請求項３の発明は、請求項１又は請求項２において、前記第３の回路基板には分配回路が実装されているものであり、第１の回路基板と第２の回路基板との間の受信信号が往復することがなく、回路構成を単純化でき、取付面積を小さくすることができる。
【００１２】
請求項４の発明は、請求項１及至請求項３において、前記第３の回路基板の端部が挿入保持される溝部が前記筐体の内周面に形成されているものであり、第３の回路基板と第１の回路基板および第２の回路基板との接続が強固になるとともに第３の回路基板の取付けが容易になる。
【００１３】
請求項５の発明は、請求項１及至請求項４において、前記入力端子部および前記出力端子部は施工面から離れた端縁に近接した部分に配置されることで、各入力端子部および各出力端子部へのケーブルの取付けが容易になる。
【００１６】
請求項６の発明は、請求項１乃至請求項５において、前記突起部は前記筐体から突出しており、前記突起部の先端面に回路基板に挿通された固定ねじが螺合するねじ穴が形成されているものであり、第２の回路基板の接地が強化されるとともに、突起部とねじ止め用台座を兼用できる。
【００１７】
請求項７の発明は、請求項１及至請求項６において、前記各回路基板において２つの信号線路パターンの間に接地パターンが形成されている場合と、前記筐体と信号線路パターンとの間に接地パターンが形成されている場合とには、当該接地パターンに囲まれた部位に接地パターン非形成部を設けるものであり、接地パターンを介して受信信号が漏洩するのを抑制できる。
【００１８】
請求項８の発明は、請求項７において、前記パターン非形成部を囲む接地パターンの一部間を接続するインピーダンス素子を設けたものであり、接地パターンによる耐ノイズ特性を確保するとともに、接地パターンを介して受信信号が漏洩するのを抑制できる。
【００１９】
【発明の実施の形態】
本発明の実施の形態を図面を用いて説明する。図３に示すように、本実施形態では２個のＣＳアンテナ１ａ、１ｂを用いる場合について例示する。各ＣＳアンテナ１ａ、１ｂは、各別の通信衛星からの電波を夫々受信する。ＣＳアンテナ１ａは、いずれもＤＣ１１Ｖの直流電圧が供給されると垂直偏波信号を所定周波数帯域の受信信号（以下、受信信号（垂直１）という）に変換して出力し、ＤＣ１５Ｖの直流電圧が供給されると水平偏波信号を所定周波数帯域の受信信号（受信信号（水平１）という）に変換して出力する。一方、ＣＳアンテナ１ｂは、ＤＣ１１Ｖの直流電圧が供給されると、垂直偏波信号を所定周波数帯域の受信信号（以下、受信信号（垂直２）という）に変換して出力し、ＤＣ１５Ｖが供給されると、水平偏波信号を所定周波数帯域の受信信号（以下、受信信号（水平２）という）に変換して出力する。
【００２０】
本実施形態の切換分配器１０には、同軸ケーブルＤ１を介してＣＳアンテナ１ａおよびＣＳアンテナ１ｂが接続される。また、切換分配器１０は、同軸ケーブルＤ２を介して一口の取出口（ＴＶコンセント）２ｂに接続され、各取出口２ｂには夫々同軸ケーブルＤ３を介してＣＳチューナ２ａが接続される。また、ＣＳチューナ２ａの後段には受信端末としてのテレビジョン受像機２が接続される。
【００２１】
本実施形態の切換分配器１０は、図２に示すように、それぞれＦ接栓たる４個ずつの入力端子部３ａ〜３ｄと出力端子部７ａ〜７ｄとを有する。入力端子部３ａ、３ｂは、ＣＳアンテナ１ａと同軸ケーブルＤ１を介して接続され、入力端子部３ｃ、３ｄは、ＣＳアンテナ１ｂと同軸ケーブルＤ１を介して接続される。各入力端子部３ａ〜３ｄには夫々増幅回路部４の入力端が接続される。また、各増幅回路部４の出力端には入力された信号を２分配する２分配回路部５ａが夫々接続され、各２分配回路部５ａの各出力端には入力された信号を夫々２分配する２分配回路部５ｂ、５ｃが夫々接続されている。したがって、入力端子部３ａ〜３ｄに入力された受信信号（垂直１）、受信信号（水平１）、受信信号（垂直２）、受信信号（水平２）の４系統の受信信号が２分配回路部５ａ〜５ｃにより夫々４分配されることになる。ところで、各出力端子部７ａ〜７ｄにはそれぞれ切換回路部６が接続される。各切換回路部６は４系統の受信信号を択一的に選択するように、２分配回路５ｂ、５ｃに接続される。つまり、２分配回路５ｂの出力は出力端子部７ａ、７ｂに対応する切換回路部６により選択され、２分配回路５ｃの出力は出力端子部７ｃ、７ｄに対応する切換回路部６により選択される。
【００２２】
増幅回路部４は、図４に示すように、入力端３０から入力されるＣＳアンテナ１ａ、１ｂからの受信信号を増幅する増幅器Ａ１を備え、増幅器Ａ１と入力端３０との間にコンデンサＣ１が接続されるとともに増幅器Ａ１と出力端３１との間にコンデンサＣ２が接続される。また、入力端３０と出力端３１との間には２個のコイルＬ１、Ｌ２の直列回路が挿入される。出力端３１にはＣＳアンテナ１ａ、１ｂおよび増幅器Ａ１に供給される直流電圧が印加され、コイルＬ１、Ｌ２の接続点から増幅器Ａ１に供電される。またコイルＬ１、Ｌ２は、直流電流を出力端３１から入力端３０に通過させるとともにＣＳアンテナ１ａ、１ｂからの受信信号を遮断する。一方、コンデンサＣ１、Ｃ２は、入力端３０からの受信信号を通過させるとともに出力端３１からの直流電流の逆流を阻止する。
【００２３】
各２分配回路部５ａ〜５ｃは同じ構成を有し、図５に示すように、入力端３３からの受信信号をトランスＴＲ１およびオートトランスＴＲ２を用いて出力端３２ａ、３２ｂに分配する。また、出力端３２ａ、３２ｂから入力端３３へ直流電流を通過させることができる。オートトランスＴＲ２の一端はコンデンサＣ３を介して接地されている。
【００２４】
切換回路部６は、ＣＳアンテナ１ａからの垂直偏波信号および水平偏波信号、ＣＳアンテナ１ｂからの垂直偏波信号および水平偏波信号から択一的に選択するスイッチから成り、夫々出力端子部７ａ〜７ｄに接続されている。
【００２５】
以下に、本実施形態の切換分配器１０の動作を説明する。受信端末がＣＳアンテナ１ａからの受信信号（垂直１）を受信する場合には、ＣＳチューナ２ａからＤＣ１１Ｖの直流電圧が同軸ケーブルＤ２、Ｄ３を介して切換分配器１０へ供給され、切換回路部６は入力端子部３ａに接続された接点を選択する。このとき、２分配回路部５ｂ、増幅回路４、入力端子部３ａを通る経路で、ＤＣ１１Ｖの直流電圧が同軸ケーブルＤ１を介してＣＳアンテナ１ａへ供給される。また、受信端末がＣＳアンテナ１ａからの受信信号（水平１）を受信する場合には、ＤＣ１５Ｖの直流電圧が同軸ケーブルＤ２を介して切換分配器１０へ供給され、切換回路部６がその直流電圧を受けて入力端子部３ｂに接続された接点を選択する。この場合もＤＣ１５Ｖの直流電圧は同軸ケーブルＤ１を介してＣＳアンテナ１ａへ供給される。受信端末がＣＳアンテナ１ｂからの受信信号（垂直２）を受信する場合には、ＣＳアンテナ１ａとＣＳアンテナ１ｂとを区別するための３２〜５３ｋＨｚの衛星選択制御信号が重畳されたＤＣ１１Ｖの直流電圧が同軸ケーブルＤ１を介して切換分配器１０に供給され、切換回路部６がその衛星選択制御信号とＤＣ１１Ｖの直流電圧とを受けて入力端子部３ｃに接続された接点を選択する。ここで、ＤＣ１１Ｖの直流電圧は同軸ケーブルＤ１を介してＣＳアンテナ１ｂへ供給される。受信端末がＣＳアンテナ１ｂからの受信信号（水平２）を受信する場合には、上記衛星選択制御信号が重畳されたＤＣ１５Ｖの直流電圧が同軸ケーブルＤ１を介して切換分配器１０へ供給され、切換回路部６がその衛星選択制御信号とＤＣ１５Ｖの直流電圧とを受けて入力端子部３ｄに接続された接点を選択する。この場合もＤＣ１５Ｖの直流電圧は同軸ケーブルＤ１を介してＣＳアンテナ１ｂへ供給される。
【００２６】
例えば、出力端子部７ａおよび出力端子部７ｂに接続される各ＣＳチューナ２ａ側において、ＣＳアンテナ１ａからの受信信号（垂直１）を受信する場合には、ＤＣ１１Ｖの直流電圧が各ＣＳチューナ２ａから同軸ケーブルＤ２、Ｄ３を介して出力端子部７ａ、切換回路部６へ供給され、切換回路部６は、ＤＣ１１Ｖの直流電圧を感知してスイッチの一番左側（図２において）を閉成する。ＤＣ１１Ｖの直流電圧は、信号線を介して２分配回路部５、増幅回路部４へ供給され、そして入力端子部３ａから同軸ケーブルＤ１を介してＣＳ受信アンテナ１ａへ供給される。そして、受信信号（垂直１）は、ＣＳ受信アンテナ１ａから同軸ケーブルＤ１を介して入力端子部３ａに出力される。受信信号（垂直１）は、入力端子部３ａから増幅回路部４で増幅され２分配回路部５ａに出力される。受信信号（垂直１）は、２分配回路部５ａから２分配回路部５ｂに出力される。受信信号（垂直１）は、２分配回路部５ｂで２分配され各切換回路部６に出力される。受信信号（垂直１）は、各切換回路部６から夫々出力端子部７ａ、出力端子部７ｂに出力され、夫々同軸ケーブルＤ２、Ｄ３を介して各ＣＳチューナ２ａに出力される。受信信号（垂直１）は、各ＣＳチューナ２ａによってテレビジョン受像機２に対応した信号に変換されテレビジョン受像機２へ出力される。上記の状態から出力端子部７ａに接続されているＣＳチューナ２ａにおいて、ＣＳアンテナ１ｂからの受信信号（水平２）を受信する場合、ＣＳチューナ２ａから３２〜５３ｋＨｚの衛星選択制御信号が重畳されたＤＣ１５Ｖの直流電圧が、同軸ケーブルＤ２、Ｄ３を介して出力端子部７ａから切換回路部６に供給される。切換回路部６は、この直流電圧を感知しスイッチの一番右側（図２において）を閉成し、この直流電圧は、上述したＤＣ１１Ｖの直流電圧がＣＳ受信アンテナ１ａに供給されたのと同様に、ＣＳ受信アンテナ１ｂに供給され、受信信号（水平２）は、ＣＳ受信アンテナ１ｂからＣＳチューナ２ａに送信されテレビジョン受像機２に対応した信号に変換されテレビジョン受像機２へ出力される。
【００２７】
なお、上述した使用例は一例であり、切換分配器１０は、出力端子部７ａ〜７ｄに接続される各ＣＳチューナ２ａに受信信号を夫々分配でき、かつＣＳアンテナ１ａおよびＣＳアンテナ１ｂからの受信信号（垂直１）、受信信号（水平１）、受信信号（垂直２）、受信信号（水平２）を夫々各ＣＳチューナ２ａに出力できる。
【００２８】
切換分配器１０は、図１に示すように、上述した回路構成を３枚の回路基板に実装し、３枚の回路基板を筐体８に収納してある。筐体８の外周部の一部分（図１（ｄ）における上部）に階段状の第１階段部８Ｆが形成され、筐体８の外周部の他の部分（図１（ｄ）における下部）に階段状の第２階段部８Ｇが形成されている。
【００２９】
第１階段部８Ｆの階段面８ｅにおいて施工面との当接面８Ａから離れた端縁に近接した部分（図１（ｄ）の右側）に入力端子部３ａ、３ｄが形成され、第１階段部８Ｆの階段面８ｇにおいて施工面との当接面８Ａから離れた端縁に近接した部分（図１（ｄ）の右側）に入力端子部３ｂ、３ｃが形成されている。入力端子部３ａおよび入力端子部３ｄと、入力端子部３ｂおよび入力端子部３ｃとは、配列方向（図１（ｂ）における左右方向）に位置をずらして配置してある。
【００３０】
一方、第２階段部８Ｇの階段面８ｆにおいて施工面との当接面８Ａから離れた端縁に近接した部分（図１（ｄ）の右側）に出力端子部７ａ、７ｂが形成され、第２階段部８Ｇの階段面８ｈにおいて施工面との当接面８Ａから離れた端縁に近接した部分（図１（ｄ）の右側）に出力端子部７ｃ、７ｄが形成されている。出力端子部７ａおよび出力端子部７ｂと、出力端子部７ｃおよび出力端子部７ｄとは、配列方向（図１（ｂ）における左右方向）に位置をずらして配置してある。
【００３１】
筐体８は、入力端子部３ｂ、３ｃおよび出力端子部７ｃ、７ｄに対応し階段面８Ｂに対面する第１の回路基板１１ａと、当接面８Ａに対面しかつ近接する第２の回路基板１１ｂと、一方に第１の回路基板１１ａ、他方に第２の回路基板１１ｂとにＬ字形状の端子１２Ｐで夫々接続され当接面８Ａと直交する方向に設けてある第３の回路基板１１ｃとを収納してある。また、筐体８は、入力端子部３ｂおよび入力端子部３ｃから直線状に形成された芯線１２Ｂが第１の回路基板１１ａに接続され、また出力端子部７ｃおよび出力端子部７ｄから直線状に形成された芯線１２Ｂが第１の回路基板１１ａに接続される。入力端子部３ａおよび入力端子部３ｄからＬ字状に形成された芯線１２Ａが第２の回路基板１１ｂに接続され、また出力端子部７ａおよび出力端子部７ｂからＬ字状に形成された芯線１２Ａが第２の回路基板１１ｂに接続される。
【００３２】
第１の回路基板１１ａは、図６に示すように、第３の回路基板１１ｃと接続するコネクタＣＮ１を設けてある。入力端子部３ｂに接続された増幅回路４からの受信信号は２分配回路部５ａで２分配され、２分配された受信信号の一方がコネクタＣＮ１のコネクタピンＰ１３に出力され、他方が２分配回路部５ｃに出力される。２分配回路部５ｃは、２分配回路部５ａからの受信信号を２分配し出力端子部７ｃと接続された切換回路部６および出力端子部７ｄと接続された切換回路部６へ出力する。また、入力端子部３ｃに接続された増幅回路４からの受信信号は２分配回路部５ａで２分配され、２分配された受信信号の一方がコネクタＣＮ１のコネクタピンＰ１４に出力され、他方が２分配回路部５ｃに出力される。２分配回路部５ｃは、２分配回路部５ａからの受信信号を２分配し出力端子部７ｃと接続された切換回路部６および出力端子部７ｄと接続された切換回路部６へ出力する。
【００３３】
第２の回路基板１１ｂは、図７に示すように、第３の回路基板１１ｃと接続されるコネクタＣＮ２を設けてある。入力端子部３ａに接続された増幅回路４からの受信信号は２分配回路部５ａで２分配され、２分配された受信信号の一方がコネクタＣＮ２のコネクタピンＰ２１に出力され、他方が２分配回路部５ｂに出力される。２分配回路部５ｂは、２分配回路部５ａからの受信信号を２分配し出力端子部７ａに接続された切換回路部６および出力端子部７ｂに接続された切換回路部６へ出力する。また、入力端子部３ｄに接続された増幅回路４からの受信信号は２分配回路部５ａで２分配され、２分配された受信信号の一方がコネクタＣＮ２のコネクタピンＰ２４に出力され、他方が２分配回路部５ｂに出力される。２分配回路部５ｂは、２分配回路部５ａからの受信信号を２分配し出力端子部７ａに接続された切換回路部６および出力端子部７ｂに接続された切換回路部６へ出力する。
【００３４】
第３の回路基板１１ｃは、図８に示すように、第１の回路基板１１ａと接続されるコネクタＣＮ３と、第２の回路基板１１ｂと接続されるコネクタＣＮ４とを備えている。第１の回路基板１ａのコネクタピンＰ１１、Ｐ１２、Ｐ１３、Ｐ１４、Ｐ１５、Ｐ１６は、夫々コネクタＣＮ３に形成されたコネクタピンＰ３１、Ｐ３２、Ｐ３３、Ｐ３４、Ｐ３５、Ｐ３６にＬ字状端子１２Ｐで接続されている。第２の回路基板１１ｂのコネクタピンＰ２１、Ｐ２２、Ｐ２３、Ｐ２４、Ｐ２５、Ｐ２６は、夫々コネクタＣＮ４に形成されたコネクタピンＰ４１、Ｐ４２、Ｐ４３、Ｐ４４、Ｐ４５、Ｐ４６にＬ字状端子１２Ｐで接続されている。また、第３の回路基板１１ｃは、コネクタピンＰ４１からの受信信号をコネクタピンＰ３１、Ｐ３５に分配する２分配回路部５ｃと、コネクタピンＰ４４からの受信信号をコネクタピンＰ３２、Ｐ３６に分配する２分配回路部５ｃと、コネクタピンＰ３３からの受信信号をコネクタピンＰ４２、Ｐ４５に分配する２分配回路部５ｂと、コネクタピンＰ３４からの受信信号をコネクタピンＰ４３、Ｐ４６に分配する２分配回路部５ｂを備えている。つまり、切換分配器１０は、第１の回路基板１１ａと第２の回路基板１１ｂと第３の回路基板１１ｃに回路構成を分散して配置し、４系統の受信信号を各受信端末に分配するとともに、切換回路部６によって４系統の受信信号を択一的に選択して受信端末側へ出力する。
【００３５】
切換分配器１０は、図１０に示すように、第１の回路基板１１ａと第３の回路基板１１ｃとの基板面には夫々接地パターンＧ１、Ｇ２が形成されている。コネクタＣＮ１に形成されているコネクタピンＰ５０（図６）は、接地パターンＧ１と接続してあり、コネクタＣＮ３、ＣＮ４に形成されているコネクタピンＰ５０（図８）は、接地パターンＧ２と接続してある。また、第２の回路基板１１ｂにも接地パターン（図示せず）が形成されており、コネクタＣＮ２に形成されているコネクタピンＰ５０（図７）は、その接地パターンに接続されている。コネクタＣＮ１とコネクタＣＮ３、コネクタＣＮ２とコネクタＣＮ４が夫々接続されると各Ｐ５０が接触して第１の回路基板１１ａと第２の回路基板１１ｂと第３の回路基板１１ｃとで回路グランドが形成される。第３の回路基板１１ｃに一端部が接続されている板状の接地板１５の他端部が第１の回路基板１１ａの接地パターンＧ１に当接され、接地板１５の接地パターンＧ１に当接した部分に形成されたねじ穴（図示せず）と第１の回路基板１１ａのねじ穴（図示せず）と金属筐体１３（筐体８は金属製であるから、以下では筐体８を金属筐体１３という）のねじ穴１７とをねじ１６でねじ止めされている。また、切換分配器１０は、図１１に示すように、第３の回路基板１１ｃを位置決め固定する凹溝１４が金属筐体１３の内側部に延設されている。
【００３６】
さらに、切換分配器１０は、図１２に示すように、入力端子部３ａから第２の回路基板１１ｂに接続される芯線１２Ａの両側部（図１２（ｂ）の左右側部）に金属筐体１３から延設され直方体の導電性部材から成る突起部２０ａおよび突起部２０ｂが夫々形成され、突起部２０ａおよび突起部２０ｂの上面（図１２（ｂ）でいう上面）に第２の回路基板１１ｂを固定するねじ穴１７を夫々設けてある。
【００３７】
なお、第３の回路基板１１ｃの接地パターンＧ２と第１の回路基板１１ａの接地パターンＧ１と金属筐体１３とを接続する接地板１５は、導電性部材であれば良く、凹溝１４と第３の回路基板１１ｃとの間に導電性部材から成るバネを利用してもよい。また、突起部２０ａおよび突起部２０ｂを設ける代りに、芯線１２Ａの第２の回路基板１１ｂと垂直方向の芯線部を板状の導電性部材で囲い、上記導電性部材の一端部を接地パターンに接続しても同様の効果を奏する。
【００３８】
図１３は、図７の第２の回路基板１１ｂの基板面Ｂ１を示す図である。信号線路パターンＳ１および信号線路パターンＳ２に沿った方向でそれらの間に長方形の接地パターン非形成部１８ａを設けてある。また、ねじ１６と信号線路パターンＳ２との間に信号線路パターンＳ２に沿った方向に長方形の接地パターン非形成部１８ｂを設けてある。また、接地パターン非形成部１８ａを左右方向（図１３（ａ）でいう左右方向）に跨り、両端部が接地パターンＧ３ａに接続されるインピーダンス素子１９ａが２つ形成されている。接地パターン１８ｂを左右方向（図１３（ａ）でいう左右方向）に跨り、両端部が接地パターンＧ３ｂに接続されるインピーダンス素子１９ｂが２つ形成されている。
【００３９】
接地パターン非形成部１８ａによって、信号線路パターンＳ１と信号線路パターンＳ２とにおいて接地パターンＧ３ａを経由して受信信号が漏洩するのが抑制される。また、接地パターン非形成部１８ｂによって、信号線路パターンＳ２とねじ１６とから他の信号線路へ受信信号が流れることが抑制される。
【００４０】
接地パターン非形成部１８ａ、１８ｂを夫々囲む接地パターンＧ３ａおよび接地パターンＧ３ｂの一部間に夫々インピーダンス素子１９ａ、１９ｂを設けたことで、接地パターン非形成部１８ａ、１８ｂによって一部分断された夫々接地パターンＧ３ａ間、接地パターンＧ３ｂ間のインピーダンスを調整することができる。
【００４１】
以上のことから、ＣＳアンテナ１ａからの垂直偏波信号と水平偏波信号、ＣＳアンテナ１ｂからの垂直偏波信号と水平偏波信号を夫々複数の端末に分配できるとともに、各端末と切換分配器１０とは１本の同軸ケーブルを接続するだけで第１の通信衛星の垂直偏波信号と水平偏波信号、第２の通信衛星の垂直偏波信号と水平偏波信号から択一的に選択して受信することができる。
【００４２】
また、階段面８ａと入力端子部３ａ、３ｄとの間に隙間が形成され、同じく階段面８ｃと入力端子部３ｂ、３ｃ、階段面８ｂと出力端子部７ａ、７ｂ、階段面８ｄと出力端子部７ｃ、７ｄとの間においても夫々隙間が形成されていることから、同軸ケーブルを切換分配器１０に接続する場合に、各端子同士および階段面が邪魔にならず施工を容易にできる。また、第１の回路基板１１ａ、第２の回路基板１１ｂおよび第３の回路基板１１ｃに回路構成を分散し第３の回路基板１１ｃに２分配回路部５ｂ、５ｃを配置したことから、第１の回路基板と第２の回路基板とを受信信号が往復することがなく回路構成を簡略化でき、取付面積が減少するため利便性が向上する。
【００４３】
また、突起部２０ａおよび突起部２０ｂが芯線１２Ａの第２の回路基板１１ｂと垂直方向の芯線部の両側端に沿って形成されていることで、芯線１２Ａにおいて安定した電磁界状態が確保され受信信号伝送特性の劣化を低減できる。また、金属筐体１３が接地板１５によって第１の回路基板１１ａおよび第３の回路基板１１ｃと回路グランドされているため、第３の回路基板１１ｃのグランドが強化され、第３の回路基板１１ｃ内での信号線間の漏洩が減少する。さらに、第３の回路基板１１ｃが凹溝１４に固定されているため、第３の回路基板１１ｃが強固に保持され第１の回路基板１１ａおよび第２の回路基板１１ｂとの接続信頼性が向上し、品質良好な切換分配器１０を提供できる。また、第３の回路基板１１ｃを製造工程において取付けるための位置決めが容易になり、製造・組立ての作業の効率が上がるため製造コストが削減できる。
【００４４】
さらに、第２の回路基板１１ｂに形成された接地パターン非形成部１８ａ、１８ｂおよびインピーダンス素子１９ａ、１９ｂによって耐ノイズ特性を保ちながらも、信号線間の接地パターン経由での受信信号の漏洩による特性劣化が抑制され、受信信号伝送特性が良好な切換分配器１０を提供できる。
【００４５】
【発明の効果】
請求項１の発明は、複数系統の受信信号がそれぞれ入力される複数個の入力端子部と、衛星からの電波を受信処理する複数台の受信端末がそれぞれ接続される複数個の出力端子部と、各入力端子部からの受信信号をそれぞれ分配する複数個の分配回路と、分配回路と同数個設けられそれぞれ前記受信端末からの指示に応じてすべての分配回路から１つの分配回路の出力を選択する切換回路とを金属製の一つの筐体に備え、前記筐体が施工面に当接する形で取り付けられ、前記入力端子部および前記出力端子部はそれぞれ筐体の外側面のうち施工面に当接する面とは直交する面であって互いに異なる面に配設され、入力端子部が配設される面は施工面から離れる向きに段差を設けた階段面であって各階段面にそれぞれ入力端子部が設けられ、出力端子部が配設される面は入力端子部が配設される階段面とは別に施工面から離れる向きに段差を設けた階段面であって各階段面にそれぞれ出力端子部が設けられ、前記入力端子部および前記出力端子部はそれぞれ施工面に直交する方向において異なる２群の位置に分かれ、各群の前記入力端子部および前記出力端子部が各々接続され施工面に沿って２層に配置された第１および第２の印刷配線板から成る回路基板と、第１の回路基板と第２の回路基板との間に両回路基板と直交する形で配置されかつ両回路基板に電気的に接続される印刷配線板から成る第３の回路基板とが設けられ、第１および第２の回路基板は施工面に沿って配置され、かつ第１および第２の回路基板のうち施工面に近い回路基板は施工面に近接して配置され、前記入力端子部および前記出力端子部は同軸コネクタであって、第１および第２の回路基板のうち施工面に近い回路基板と接続された前記入力端子部および前記出力端子部は施工面に沿う部分と施工面側に延設されて回路基板に直交し回路基板に接続される部分とから成るＬ字状接続端子を芯線部として備え、Ｌ字状接続端子のうち回路基板に直交する部位の両側に隣接する形で、回路基板の接地パターンと導通している導電性を有した突起部を配設したものであり、各出力端子部と各受信端末側とを夫々１本のケーブルで接続するだけで、複数系統の受信信号を複数の受信端末側で夫々択一的に選択して受信できるようになる。その結果、屋内配線工事が容易になり、また別途に切換器を設ける必要もないのである。しかも、入力端子部と出力端子部とが夫々施工面に直交する方向において２群の位置に分かれているから、入力端子部および出力端子部を夫々配置している範囲の施工面への投影面積を比較的小さくすることができ、結果的に取付面積が小さくなるという利点がある。さらに、回路部品を各回路基板に分散させて実装することができ、取付面積を小さくすることができる。また、第１および第２の回路基板のうち施工面に近い回路基板と接続された前記入力端子部および前記出力端子部はＬ字状接続端子を芯線部として備えており、第１および第２の回路基板のうち施工面に近い回路基板を施工面に近接できるから、第３の回路基板の面積をより大きくすることが可能となり、第３の回路基板に実装可能な回路部品数を多くして第１の回路基板および第２の回路基板の回路部品数を低減することができ、結果的に取付面積を小さくすることができる。さらにまた、Ｌ字状接続端子のうち回路基板に直交する部位の両側に隣接する形で、接地パターンと導通している導電性を有した突起部を配設しているから、Ｌ字状接続端子の周囲に安定した電磁界状態を確保できるという利点がある。
【００４７】
請求項２の発明は、請求項１において、前記第１の回路基板の接地パターンと前記第２の回路基板の接地パターンと前記筐体との少なくとも１つと、前記第３の回路基板の接地パターンとを接続する接続部材を備えるので、各接地パターンを介して受信信号が漏洩するのを抑制できるという利点がある。
【００４８】
請求項３の発明は、請求項１又は請求項２において、前記第３の回路基板には分配回路が実装されているので、第１の回路基板と第２の回路基板との間の受信信号が往復することがなく、回路構成を簡略化でき取付面積を小さくすることができるという利点がある。
【００４９】
請求項４の発明は、請求項１及至請求項３において、前記第３の回路基板の端部が挿入保持される溝部が前記筐体の内周面に形成されているので、第３の回路基板と第１の回路基板および第２の回路基板との接続が強固になるとともに第３の回路基板の取付けが容易になり、機器品質と製造組立て時の作業効率を向上することができるという利点がある。
【００５０】
請求項５の発明は、請求項１及至請求項４において、前記入力端子部および前記出力端子部は施工面から離れた端縁に近接した部分に配置されるので、各入力端子部および各出力端子部へのケーブルの取付けが容易になり、施工作業を効率化することができるという利点がある。
【００５３】
請求項６の発明は、請求項１乃至請求項５において、前記突起部は前記筐体から突出しており、前記突起部の先端面に回路基板に挿通された固定ねじが螺合するねじ穴が形成されていることで、第２の回路基板の接地が強化されるとともに、突起部とねじ止め用台座とを兼用でき、機器の品質の向上と取付面積を小さくできるという利点がある。
【００５４】
請求項７の発明は、請求項１及至請求項６において、前記各回路基板において２つの信号線路パターンの間に接地パターンが形成されている場合と、前記筐体と信号線路パターンとの間に接地パターンが形成されている場合とには、当該接地パターンに囲まれた部位に接地パターン非形成部を設けるので、接地パターンを介して受信信号が漏洩するのを抑制できるという利点がある。
【００５５】
請求項８の発明は、請求項７において、前記パターン非形成部を囲む接地パターンの一部間を接続するインピーダンス素子を設けたので、接地パターンによる耐ノイズ特性を確保するとともに、接地パターンを介して受信信号が漏洩するのを抑制できるという利点がある。
【図面の簡単な説明】
【図１】本発明の実施の形態を示し、（ａ）切換分配器の入力端子部が形成された階段部を示す正面図であり、（ｂ）同上の上面図であり、（ｃ）同上の出力端子部が形成された階段部を示す正面図であり、（ｄ）同上の側面図である。
【図２】同上の切換分配器を示す回路図である。
【図３】同上の切換分配器を用いたＣＳ放送受信システムの一例を示す接続図である。
【図４】同上に用いる増幅回路部を示す回路図である。
【図５】同上に用いる分配回路部を示す回路図である。
【図６】同上の切換分配器の上面側に設けられた第１の回路基板を示す回路図である。
【図７】同上の取付面側に設けられた第２の回路基板の回路図である。
【図８】同上の取付面と直交する方向に設けられた第３の回路基板の回路図である。
【図９】（ａ）第１の回路基板と第３の回路基板とのコネクタによる接続部を取付面側から見た正面図であり、（ｂ）取付面を上にして第１の回路基板と第３の回路基板とのコネクタを見た側面図であり、（ｃ）同上の側面図である。
【図１０】（ａ）第１の回路基板に形成された接地パターンと第３の回路基板に形成された接地パターンと金属筐体とを接続する接地片を底面側から見た正面図であり、（ｂ）同上の側面図である。
【図１１】第３の回路基板を固定する凹溝と第１の回路基板の接地パターンと第３の回路基板の接地パターンとの接地片を示す斜視図である。
【図１２】（ａ）切換分配器の突起部を底面側から見た正面図であり、（ｂ）同上の底面を上にしたときの上記突起部を示す正面図であり、（ｃ）同上の側面図であり、（ｄ）同上の斜視図である。
【図１３】（ａ）回路基板に形成された接地パターン非形成部の上面図であり、（ｂ）同上の断面図である。
【符号の説明】
３ａ〜３ｄ入力端子部
５ａ〜５ｃ２分配回路部
６切換回路部
７ａ〜７ｄ出力端子部
８筐体
１１ａ第１の回路基板
１１ｂ第２の回路基板
１１ｃ第３の回路基板
１２Ａ芯線
１３金属筐体
１４凹溝
１５接地板
１８接地パターン非形成部
１９インピーダンス素子
２０ａ突起部
２０ｂ突起部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a switching distributor that distributes a plurality of received signals from an antenna to a plurality of receiving terminals, and selects and receives a desired received signal at each receiving terminal.
[0002]
[Prior art]
Conventionally, in the communication field using artificial satellites, a technology for transmitting different information using two types of polarized waves orthogonal to each other such as vertically polarized waves and horizontally polarized waves or right-handed circularly polarized waves and left-handed circularly polarized waves. Are known. For example, communication satellites used for satellite broadcasting use vertically polarized waves and horizontally polarized waves. A satellite reception antenna (so-called CS antenna) that receives transmitted radio waves receives a vertical polarization signal and a horizontal polarization signal from each communication satellite, and converts each polarization signal into a reception signal in a predetermined frequency band. Convert and output.
[0003]
Therefore, when a reception terminal that receives each reception signal from the CS antenna is used and each reception signal is transmitted from one CS antenna to the reception terminal via a cable, the CS antenna has a vertical polarization and a horizontal polarization, respectively. One cable is connected to each corresponding output terminal section, and a total of two cables are wired to the receiving terminal. If a plurality of receiving terminals are to listen together, a distributor is provided between each receiving terminal and two cables drawn from one CS antenna, and each received signal from the CS antenna is received. It is necessary to distribute to terminals.
[0004]
[Problems to be solved by the invention]
As is clear from the above description, in order to use a plurality of systems of CS broadcasting services in a plurality of rooms, a plurality of outlets for extracting received signals are required for each room in which each receiving terminal is installed. Become. Therefore, it is necessary not only to connect the distributor and the CS antenna, but also to connect the distributor and each outlet with a cable, which makes indoor wiring work extremely troublesome.
[0005]
In addition, a CS tuner is generally provided in front of the receiving terminal in order to receive a received signal from a communication satellite. However, the CS tuner receives a plurality of received signals from each CS antenna as it is, and receives the received signal. Since it does not have a function of selectively selecting a system and outputting it to the receiving terminal side, it is necessary to provide a separate switch for switching the system of the received signal input to the CS tuner.
[0006]
On the other hand, a plurality of input terminal units and a plurality of output terminal units are provided in one housing, a distribution circuit unit that distributes a plurality of received signals input from each input terminal unit to a plurality of distribution circuits, and all distribution A switching distributor in which a plurality of switching devices that respectively select the outputs of one distribution circuit unit from the circuit unit and output them to the output terminal unit are provided in the housing is conceivable. However, simply arranging a plurality of input terminal portions and a plurality of output terminal portions in parallel with the housing causes a problem that the housing is enlarged and the mounting area is increased.
[0007]
The present invention has been made in view of the above problems, and its purpose is to facilitate indoor wiring work by selectively selecting a plurality of systems of received signals and outputting them from one output terminal section. It is another object of the present invention to provide a switching distributor that does not require a switching device separately from the distributor and that has a relatively small mounting area.
[0008]
[Means for Solving the Problems]
  The invention of claim 1 includes a plurality of input terminal portions to which a plurality of systems of received signals are respectively input, and a plurality of output terminal portions to which a plurality of receiving terminals for receiving and processing radio waves from a satellite are respectively connected. , A plurality of distribution circuits for distributing received signals from each input terminal unit, and the same number of distribution circuits as each of the distribution circuits, each of which selects the output of one distribution circuit according to an instruction from the receiving terminal And a switching circuit to be mounted on a metal housing, and the housing is attached in contact with the construction surface, and the input terminal portion and the output terminal portion are respectively on the construction surface of the outer surface of the housing. It is a surface that is orthogonal to the abutting surface and is disposed on a different surface,The surface on which the input terminal portion is disposed is a staircase surface provided with a step in a direction away from the construction surface, and the input terminal portion is provided on each step surface, and the surface on which the output terminal portion is disposed is the input terminal portion. A staircase surface provided with a step in a direction away from the construction surface separately from the staircase surface where the output terminal portion is disposed, and each staircase surface is provided with an output terminal portion, and the input terminal portion and the output terminal portion are each a construction surface. From the first and second printed wiring boards that are divided into two different positions in a direction orthogonal to the first and second printed wiring boards, in which the input terminal portions and the output terminal portions of each group are respectively connected and arranged in two layers along the construction surface And a third circuit comprising a printed circuit board disposed between the first circuit board and the second circuit board in a form orthogonal to both circuit boards and electrically connected to both circuit boards. And a first circuit board and a second circuit board Of the first and second circuit boards, the circuit board close to the construction surface is arranged close to the construction surface, and the input terminal portion and the output terminal portion are coaxial connectors. The input terminal portion and the output terminal portion connected to the circuit board close to the construction surface of the first and second circuit boards extend to the portion along the construction surface and the construction surface side and are orthogonal to the circuit board. An L-shaped connection terminal composed of a portion connected to the circuit board is provided as a core part, and is electrically connected to the ground pattern of the circuit board in a form adjacent to both sides of the portion of the L-shaped connection terminal orthogonal to the circuit board. Protrusions having electrical conductivity are disposedBy simply connecting each output terminal section and each receiving terminal side with a single cable, a plurality of received signals can be selectively selected and received on each receiving terminal side. Become. As a result, indoor wiring work is facilitated, and there is no need to provide a separate switch. Moreover, the input terminal section and output terminal sectionTogaIn each direction perpendicular to the construction surfaceDivided into two groups of positionsTherefore, the projection area onto the construction surface in the range where the input terminal portion and the output terminal portion are respectively arranged can be made relatively small, resulting in a reduction in the mounting area.Furthermore, circuit components can be distributed and mounted on each circuit board, and the mounting area can be reduced. The input terminal portion and the output terminal portion connected to the circuit board close to the construction surface of the first and second circuit boards include an L-shaped connection terminal as a core wire portion. Because the circuit board close to the construction surface can be close to the construction surface, the area of the third circuit board can be increased, and the number of circuit components that can be mounted on the third circuit board is increased. Thus, the number of circuit components on the first circuit board and the second circuit board can be reduced, and as a result, the mounting area can be reduced. Furthermore, since the L-shaped connection terminals are adjacent to both sides of the portion orthogonal to the circuit board, conductive protrusions that are electrically connected to the ground pattern are disposed. A stable electromagnetic field can be secured around the terminals.
[0010]
  Claim2The invention of claim1And a connection member for connecting at least one of the ground pattern of the first circuit board, the ground pattern of the second circuit board, and the housing, and the ground pattern of the third circuit board. Yes, it is possible to suppress the reception signal from leaking through each ground pattern.
[0011]
  Claim3The invention of claim1Or claim2In the third circuit board, a distribution circuit is mounted on the third circuit board, so that a reception signal between the first circuit board and the second circuit board does not reciprocate, and the circuit configuration is simplified. The mounting area can be reduced.
[0012]
  Claim4The invention of claim1Claim3A groove portion into which an end portion of the third circuit board is inserted and held is formed on the inner peripheral surface of the casing, and the third circuit board, the first circuit board, and the second circuit The connection with the board becomes strong and the attachment of the third circuit board becomes easy.
[0013]
  Claim5The invention of claim1Claim4In,in frontThe input terminal portion and the output terminal portion are disposed in a portion close to the edge away from the construction surface, so that the cable can be easily attached to each input terminal portion and each output terminal portion.
[0016]
  Claim6The invention of claim1 to 5The protrusion protrudes from the housing, and a screw hole into which a fixing screw inserted into the circuit board is screwed is formed on the front end surface of the protrusion. While grounding is strengthened, the projection and the screwing base can be used together.
[0017]
  Claim7The invention of claim 1 to claim 16In the case where a ground pattern is formed between two signal line patterns in each circuit board and a ground pattern is formed between the housing and the signal line pattern, A ground pattern non-formation portion is provided at a portion surrounded by the pattern, and leakage of a reception signal through the ground pattern can be suppressed.
[0018]
  Claim8The invention of claim7In this case, an impedance element for connecting a part of the ground pattern surrounding the pattern non-forming portion is provided, and noise resistance characteristics due to the ground pattern are ensured, and a received signal leaks through the ground pattern. Can be suppressed.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 3, in this embodiment, the case where two CS antennas 1a and 1b are used is illustrated. Each CS antenna 1a, 1b receives a radio wave from each other communication satellite. Each of the CS antennas 1a, when supplied with a DC voltage of DC 11V, converts a vertically polarized signal into a received signal of a predetermined frequency band (hereinafter referred to as a received signal (vertical 1)) and outputs the DC 15V DC voltage. When supplied, the horizontal polarization signal is converted into a reception signal (referred to as reception signal (horizontal 1)) in a predetermined frequency band and output. On the other hand, when a DC voltage of 11 V DC is supplied, the CS antenna 1 b converts a vertically polarized signal into a received signal in a predetermined frequency band (hereinafter referred to as a received signal (vertical 2)) and outputs it, and is supplied with 15 V DC. Then, the horizontally polarized signal is converted into a received signal in a predetermined frequency band (hereinafter referred to as a received signal (horizontal 2)) and output.
[0020]
A CS antenna 1a and a CS antenna 1b are connected to the switching distributor 10 of the present embodiment via a coaxial cable D1. The switching distributor 10 is connected to a single outlet (TV outlet) 2b via a coaxial cable D2, and a CS tuner 2a is connected to each outlet 2b via a coaxial cable D3. Further, a television receiver 2 as a receiving terminal is connected to the subsequent stage of the CS tuner 2a.
[0021]
As shown in FIG. 2, the switching distributor 10 of the present embodiment includes four input terminal portions 3 a to 3 d and output terminal portions 7 a to 7 d each serving as an F connection. The input terminal portions 3a and 3b are connected to the CS antenna 1a via a coaxial cable D1, and the input terminal portions 3c and 3d are connected to the CS antenna 1b via a coaxial cable D1. The input terminals of the amplifier circuit unit 4 are connected to the input terminal units 3a to 3d, respectively. Further, a two distribution circuit unit 5a for distributing the input signal into two is connected to the output terminal of each amplifier circuit unit 4, and the input signal is divided into two at each output terminal of each two distribution circuit unit 5a. The two distribution circuit sections 5b and 5c are connected to each other. Therefore, the four received signals of the received signal (vertical 1), the received signal (horizontal 1), the received signal (vertical 2), and the received signal (horizontal 2) input to the input terminal units 3a to 3d are divided into two distribution circuit units. Four distributions are made by 5a to 5c. By the way, the switching circuit unit 6 is connected to each of the output terminal units 7a to 7d. Each switching circuit unit 6 is connected to the two distribution circuits 5b and 5c so as to selectively select four systems of received signals. That is, the output of the two distribution circuit 5b is selected by the switching circuit unit 6 corresponding to the output terminal units 7a and 7b, and the output of the two distribution circuit 5c is selected by the switching circuit unit 6 corresponding to the output terminal units 7c and 7d. .
[0022]
As shown in FIG. 4, the amplifier circuit unit 4 includes an amplifier A1 that amplifies a received signal from the CS antennas 1a and 1b input from the input terminal 30, and a capacitor C1 is provided between the amplifier A1 and the input terminal 30. The capacitor C2 is connected between the amplifier A1 and the output terminal 31 while being connected. A series circuit of two coils L1 and L2 is inserted between the input end 30 and the output end 31. A DC voltage supplied to the CS antennas 1a and 1b and the amplifier A1 is applied to the output terminal 31, and is supplied to the amplifier A1 from the connection point of the coils L1 and L2. In addition, the coils L1 and L2 allow a direct current to pass from the output end 31 to the input end 30 and block a reception signal from the CS antennas 1a and 1b. On the other hand, the capacitors C1 and C2 allow a reception signal from the input terminal 30 to pass and prevent a direct current from flowing back from the output terminal 31.
[0023]
Each of the two distribution circuit units 5a to 5c has the same configuration, and distributes the received signal from the input terminal 33 to the output terminals 32a and 32b using the transformer TR1 and the autotransformer TR2, as shown in FIG. Further, it is possible to pass a direct current from the output ends 32 a and 32 b to the input end 33. One end of the autotransformer TR2 is grounded via a capacitor C3.
[0024]
The switching circuit unit 6 is composed of switches that are alternatively selected from a vertical polarization signal and a horizontal polarization signal from the CS antenna 1a, and a vertical polarization signal and a horizontal polarization signal from the CS antenna 1b. 7a to 7d.
[0025]
Below, operation | movement of the switching distributor 10 of this embodiment is demonstrated. When the receiving terminal receives a reception signal (vertical 1) from the CS antenna 1a, a DC voltage of DC11V is supplied from the CS tuner 2a to the switching distributor 10 via the coaxial cables D2 and D3, and the switching circuit unit 6 Selects a contact point connected to the input terminal portion 3a. At this time, DC 11V DC voltage is supplied to the CS antenna 1a via the coaxial cable D1 through a path that passes through the two distribution circuit unit 5b, the amplifier circuit 4, and the input terminal unit 3a. When the receiving terminal receives a reception signal (horizontal 1) from the CS antenna 1a, a DC voltage of DC 15V is supplied to the switching distributor 10 via the coaxial cable D2, and the switching circuit unit 6 supplies the DC voltage. The contact connected to the input terminal portion 3b is selected. Also in this case, a DC voltage of DC 15V is supplied to the CS antenna 1a via the coaxial cable D1. When the receiving terminal receives a reception signal (vertical 2) from the CS antenna 1b, a DC voltage of 11V DC on which a satellite selection control signal of 32 to 53 kHz for distinguishing the CS antenna 1a and the CS antenna 1b is superimposed. Is supplied to the switching distributor 10 through the coaxial cable D1, and the switching circuit unit 6 receives the satellite selection control signal and the DC voltage of DC11V and selects the contact point connected to the input terminal unit 3c. Here, a DC voltage of DC11V is supplied to the CS antenna 1b via the coaxial cable D1. When the receiving terminal receives the received signal (horizontal 2) from the CS antenna 1b, the DC voltage of DC 15V on which the satellite selection control signal is superimposed is supplied to the switching distributor 10 via the coaxial cable D1, and the switching is performed. The circuit unit 6 receives the satellite selection control signal and the DC voltage of DC 15 V and selects a contact point connected to the input terminal unit 3d. Also in this case, a DC voltage of DC 15V is supplied to the CS antenna 1b via the coaxial cable D1.
[0026]
For example, when receiving a reception signal (vertical 1) from the CS antenna 1a on each CS tuner 2a side connected to the output terminal unit 7a and the output terminal unit 7b, a DC voltage of DC11V is generated from each CS tuner 2a. The signals are supplied to the output terminal unit 7a and the switching circuit unit 6 through the coaxial cables D2 and D3, and the switching circuit unit 6 senses the DC voltage of DC11V and closes the leftmost side (in FIG. 2) of the switch. A DC voltage of DC11V is supplied to the two distribution circuit unit 5 and the amplification circuit unit 4 through the signal line, and is supplied from the input terminal unit 3a to the CS receiving antenna 1a through the coaxial cable D1. The received signal (vertical 1) is output from the CS receiving antenna 1a to the input terminal portion 3a via the coaxial cable D1. The received signal (vertical 1) is amplified by the amplifier circuit unit 4 from the input terminal unit 3a and output to the two distribution circuit unit 5a. The reception signal (vertical 1) is output from the 2 distribution circuit unit 5a to the 2 distribution circuit unit 5b. The received signal (vertical 1) is divided into two by the two distribution circuit unit 5b and output to each switching circuit unit 6. The received signal (vertical 1) is output from each switching circuit unit 6 to the output terminal unit 7a and the output terminal unit 7b, and is output to each CS tuner 2a via the coaxial cables D2 and D3, respectively. The received signal (vertical 1) is converted into a signal corresponding to the television receiver 2 by each CS tuner 2a and output to the television receiver 2. In the CS tuner 2a connected to the output terminal unit 7a from the above state, when receiving a reception signal (horizontal 2) from the CS antenna 1b, a satellite selection control signal of 32 to 53 kHz is superimposed from the CS tuner 2a. A DC voltage of DC 15 V is supplied from the output terminal unit 7a to the switching circuit unit 6 through the coaxial cables D2 and D3. The switching circuit unit 6 senses this DC voltage and closes the rightmost side (in FIG. 2) of the switch, and this DC voltage is the same as the DC voltage of 11 V DC supplied to the CS receiving antenna 1a. Then, the received signal (horizontal 2) is supplied to the CS receiving antenna 1b, is transmitted from the CS receiving antenna 1b to the CS tuner 2a, is converted into a signal corresponding to the television receiver 2, and is output to the television receiver 2. .
[0027]
Note that the above-described usage example is an example, and the switching distributor 10 can distribute received signals to the CS tuners 2a connected to the output terminal units 7a to 7d, and receive signals from the CS antenna 1a and the CS antenna 1b. A signal (vertical 1), a received signal (horizontal 1), a received signal (vertical 2), and a received signal (horizontal 2) can be output to each CS tuner 2a.
[0028]
As shown in FIG. 1, the switching distributor 10 has the circuit configuration described above mounted on three circuit boards, and the three circuit boards are housed in a housing 8. A stepped first staircase portion 8F is formed on a part of the outer peripheral portion of the housing 8 (upper portion in FIG. 1D), and on the other portion of the outer peripheral portion of the housing 8 (lower portion in FIG. 1D). A step-like second staircase portion 8G is formed.
[0029]
Input terminal portions 3a and 3d are formed on the step surface 8e of the first step portion 8F close to the edge away from the contact surface 8A with the construction surface (on the right side of FIG. 1D), and the first step Input terminal portions 3b and 3c are formed on the step surface 8g of the portion 8F close to the end edge away from the contact surface 8A with the construction surface (on the right side in FIG. 1D). The input terminal portion 3a and the input terminal portion 3d, and the input terminal portion 3b and the input terminal portion 3c are arranged so as to be shifted in the arrangement direction (the left-right direction in FIG. 1B).
[0030]
  On the other hand, in the step surface 8f of the second staircase portion 8G, the output terminal portions 7a, 7 are provided at portions (right side in FIG. 1 (d)) close to the edge away from the contact surface 8A with the construction surface.bAnd the output terminal portions 7c and 7d are formed on the step surface 8h of the second step portion 8G close to the edge away from the contact surface 8A with the construction surface (the right side in FIG. 1 (d)). ing. Output terminal portion 7a and output terminal portion 7bThe output terminal portion 7c and the output terminal portion 7d are arranged so as to be shifted in the arrangement direction (left-right direction in FIG. 1B).
[0031]
The housing 8 corresponds to the input terminal portions 3b and 3c and the output terminal portions 7c and 7d, the first circuit board 11a facing the step surface 8B, and the second circuit board facing and close to the contact surface 8A. The third circuit board 11c is connected to the first circuit board 11a on one side and the second circuit board 11b on the other side by an L-shaped terminal 12P and provided in a direction orthogonal to the contact surface 8A. And is stored. Further, the housing 8 has a core wire 12B formed linearly from the input terminal portion 3b and the input terminal portion 3c, connected to the first circuit board 11a, and linearly formed from the output terminal portion 7c and the output terminal portion 7d. The formed core wire 12B is connected to the first circuit board 11a. A core wire 12A formed in an L shape from the input terminal portion 3a and the input terminal portion 3d is connected to the second circuit board 11b, and a core wire 12A formed in an L shape from the output terminal portion 7a and the output terminal portion 7b. Are connected to the second circuit board 11b.
[0032]
As shown in FIG. 6, the first circuit board 11a is provided with a connector CN1 that is connected to the third circuit board 11c. The received signal from the amplifier circuit 4 connected to the input terminal unit 3b is divided into two by the two distribution circuit unit 5a, one of the two divided reception signals is output to the connector pin P13 of the connector CN1, and the other is the two distribution circuit. Is output to the unit 5c. The 2-distribution circuit unit 5c divides the received signal from the 2-distribution circuit unit 5a into two and outputs it to the switching circuit unit 6 connected to the output terminal unit 7c and the switching circuit unit 6 connected to the output terminal unit 7d. The received signal from the amplifier circuit 4 connected to the input terminal unit 3c is divided into two by the two distribution circuit unit 5a, and one of the two divided reception signals is output to the connector pin P14 of the connector CN1, and the other is 2 It is output to the distribution circuit unit 5c. The 2-distribution circuit unit 5c divides the received signal from the 2-distribution circuit unit 5a into two and outputs it to the switching circuit unit 6 connected to the output terminal unit 7c and the switching circuit unit 6 connected to the output terminal unit 7d.
[0033]
As shown in FIG. 7, the second circuit board 11b is provided with a connector CN2 connected to the third circuit board 11c. The received signal from the amplifier circuit 4 connected to the input terminal unit 3a is divided into two by the two distribution circuit unit 5a, one of the two divided reception signals is output to the connector pin P21 of the connector CN2, and the other is the two distribution circuit. Is output to the unit 5b. The 2-distribution circuit unit 5b distributes the received signal from the 2-distribution circuit unit 5a into two and outputs it to the switching circuit unit 6 connected to the output terminal unit 7a and the switching circuit unit 6 connected to the output terminal unit 7b. Also, the received signal from the amplifier circuit 4 connected to the input terminal portion 3d is divided into two by the two distribution circuit portion 5a, one of the two divided reception signals is output to the connector pin P24 of the connector CN2, and the other is 2 It is output to the distribution circuit unit 5b. The 2-distribution circuit unit 5b distributes the received signal from the 2-distribution circuit unit 5a into two and outputs it to the switching circuit unit 6 connected to the output terminal unit 7a and the switching circuit unit 6 connected to the output terminal unit 7b.
[0034]
As shown in FIG. 8, the third circuit board 11c includes a connector CN3 connected to the first circuit board 11a and a connector CN4 connected to the second circuit board 11b. Connector pins P11, P12, P13, P14, P15, and P16 of the first circuit board 1a are connected to connector pins P31, P32, P33, P34, P35, and P36 formed on the connector CN3 through L-shaped terminals 12P. Has been. The connector pins P21, P22, P23, P24, P25, and P26 of the second circuit board 11b are connected to the connector pins P41, P42, P43, P44, P45, and P46 formed on the connector CN4 through the L-shaped terminal 12P. Has been. The third circuit board 11c distributes the reception signal from the connector pin P41 to the connector pins P31 and P35, and distributes the reception signal from the connector pin P44 to the connector pins P32 and P36. A distribution circuit unit 5c, a two distribution circuit unit 5b that distributes a reception signal from the connector pin P33 to the connector pins P42 and P45, and a two distribution circuit unit 5b that distributes a reception signal from the connector pin P34 to the connector pins P43 and P46. It has. In other words, the switching distributor 10 distributes and arranges circuit configurations on the first circuit board 11a, the second circuit board 11b, and the third circuit board 11c, and distributes four received signals to each receiving terminal. At the same time, the switching circuit 6 selectively selects four systems of received signals and outputs them to the receiving terminal side.
[0035]
As shown in FIG. 10, the switching distributor 10 has ground patterns G1 and G2 formed on the substrate surfaces of the first circuit board 11a and the third circuit board 11c, respectively. Connector pin P50 (FIG. 6) formed on connector CN1 is connected to ground pattern G1, and connector pin P50 (FIG. 8) formed on connectors CN3 and CN4 is connected to ground pattern G2. is there. A ground pattern (not shown) is also formed on the second circuit board 11b, and the connector pin P50 (FIG. 7) formed on the connector CN2 is connected to the ground pattern. When the connector CN1 and the connector CN3, and the connector CN2 and the connector CN4 are connected to each other, each P50 comes into contact, and a circuit ground is formed by the first circuit board 11a, the second circuit board 11b, and the third circuit board 11c. The The other end of the plate-like ground plate 15 having one end connected to the third circuit board 11c is in contact with the ground pattern G1 of the first circuit board 11a, and is in contact with the ground pattern G1 of the ground board 15 The screw hole (not shown) formed in the part, the screw hole (not shown) of the first circuit board 11a, and the metal casing 13 (the casing 8 is made of metal. A screw hole 17 of the metal housing 13 is fixed with a screw 16. Further, as shown in FIG. 11, the switching distributor 10 has a concave groove 14 for positioning and fixing the third circuit board 11 c extending on the inner side of the metal housing 13.
[0036]
Further, as shown in FIG. 12, the switching distributor 10 has a metal casing on both side portions (left and right side portions in FIG. 12B) of the core wire 12A connected from the input terminal portion 3a to the second circuit board 11b. 13, a protrusion 20a and a protrusion 20b made of a rectangular parallelepiped conductive member are formed, and the second circuit board 11b is formed on the upper surface (the upper surface in FIG. 12B) of the protrusion 20a and the protrusion 20b. Are respectively provided with screw holes 17.
[0037]
The ground plate 15 that connects the ground pattern G2 of the third circuit board 11c, the ground pattern G1 of the first circuit board 11a, and the metal housing 13 may be a conductive member, and the groove 14 and the first groove A spring made of a conductive member may be used between the three circuit boards 11c. Further, instead of providing the protrusion 20a and the protrusion 20b, the core portion of the core wire 12A and the core wire portion perpendicular to the second circuit board 11b is surrounded by a plate-like conductive member, and one end portion of the conductive member is used as a ground pattern. Even if connected, the same effect is obtained.
[0038]
FIG. 13 is a diagram showing a substrate surface B1 of the second circuit board 11b of FIG. A rectangular ground pattern non-forming portion 18a is provided between the signal line pattern S1 and the signal line pattern S2 in the direction along the signal line pattern S1. Further, a rectangular ground pattern non-forming portion 18b is provided between the screw 16 and the signal line pattern S2 in the direction along the signal line pattern S2. Further, two impedance elements 19a are formed so as to straddle the ground pattern non-forming portion 18a in the left-right direction (the left-right direction in FIG. 13A), and both ends are connected to the ground pattern G3a. Two impedance elements 19b are formed so as to straddle the ground pattern 18b in the left-right direction (the left-right direction in FIG. 13A) and both ends are connected to the ground pattern G3b.
[0039]
The ground pattern non-forming part 18a suppresses the leakage of the received signal via the ground pattern G3a in the signal line pattern S1 and the signal line pattern S2. In addition, the ground pattern non-forming portion 18b suppresses the reception signal from flowing from the signal line pattern S2 and the screw 16 to another signal line.
[0040]
Since the impedance elements 19a and 19b are respectively provided between the ground pattern G3a and the ground pattern G3b that respectively surround the ground pattern non-forming portions 18a and 18b, the ground portions partially cut off by the ground pattern non-forming portions 18a and 18b are grounded. The impedance between the patterns G3a and the ground pattern G3b can be adjusted.
[0041]
As described above, the vertical polarization signal and horizontal polarization signal from the CS antenna 1a and the vertical polarization signal and horizontal polarization signal from the CS antenna 1b can be distributed to a plurality of terminals, respectively, and each terminal and the switching distributor. 10 is alternatively selected from the vertical polarization signal and horizontal polarization signal of the first communication satellite, and the vertical polarization signal and horizontal polarization signal of the second communication satellite simply by connecting one coaxial cable. Can be received.
[0042]
Further, a gap is formed between the staircase surface 8a and the input terminal portions 3a and 3d. Similarly, the staircase surface 8c and the input terminal portions 3b and 3c, the staircase surface 8b and the output terminal portions 7a and 7b, and the staircase surface 8d and the output terminal. Since gaps are also formed between the portions 7c and 7d, when connecting the coaxial cable to the switching distributor 10, the terminals and the stepped surface do not get in the way and the construction can be facilitated. Further, since the circuit configuration is distributed to the first circuit board 11a, the second circuit board 11b, and the third circuit board 11c, and the two distribution circuit portions 5b and 5c are arranged on the third circuit board 11c, the first circuit board 11a The received signal does not reciprocate between the circuit board and the second circuit board, the circuit configuration can be simplified, and the mounting area is reduced, thereby improving convenience.
[0043]
In addition, since the protrusion 20a and the protrusion 20b are formed along both side ends of the core wire portion perpendicular to the second circuit board 11b of the core wire 12A, a stable electromagnetic field state is secured in the core wire 12A. Deterioration of signal transmission characteristics can be reduced. Further, since the metal housing 13 is grounded to the first circuit board 11a and the third circuit board 11c by the ground plate 15, the ground of the third circuit board 11c is strengthened, and the third circuit board 11c is strengthened. Leakage between signal lines in the inside is reduced. Further, since the third circuit board 11c is fixed in the concave groove 14, the third circuit board 11c is firmly held, and the connection reliability between the first circuit board 11a and the second circuit board 11b is improved. Therefore, it is possible to provide the switching distributor 10 with good quality. In addition, the positioning for mounting the third circuit board 11c in the manufacturing process is facilitated, and the manufacturing / assembling work efficiency is increased, so that the manufacturing cost can be reduced.
[0044]
Furthermore, characteristics due to leakage of received signals via the ground pattern between the signal lines while maintaining noise resistance characteristics by the ground pattern non-forming portions 18a and 18b and the impedance elements 19a and 19b formed on the second circuit board 11b. It is possible to provide a switching distributor 10 in which deterioration is suppressed and reception signal transmission characteristics are good.
[0045]
【The invention's effect】
  The invention of claim 1 includes a plurality of input terminal portions to which a plurality of systems of received signals are respectively input, and a plurality of output terminal portions to which a plurality of receiving terminals for receiving and processing radio waves from satellites are respectively connected. , A plurality of distribution circuits for distributing received signals from each input terminal unit, and the same number of distribution circuits as each of the distribution circuits, each of which selects the output of one distribution circuit according to an instruction from the receiving terminal And a switching circuit to be mounted on a metal housing, and the housing is attached in contact with the construction surface, and the input terminal portion and the output terminal portion are respectively on the construction surface of the outer surface of the housing. It is a surface that is orthogonal to the abutting surface and is disposed on a different surface,The surface on which the input terminal portion is disposed is a staircase surface provided with a step in a direction away from the construction surface, and the input terminal portion is provided on each step surface, and the surface on which the output terminal portion is disposed is the input terminal portion. A staircase surface provided with a step in a direction away from the construction surface separately from the staircase surface where the output terminal portion is disposed, and each staircase surface is provided with an output terminal portion, and the input terminal portion and the output terminal portion are each a construction surface. From the first and second printed wiring boards that are divided into two different positions in a direction orthogonal to the first and second printed wiring boards, in which the input terminal portions and the output terminal portions of each group are respectively connected and arranged in two layers along the construction surface And a third circuit comprising a printed circuit board disposed between the first circuit board and the second circuit board in a form orthogonal to both circuit boards and electrically connected to both circuit boards. And a first circuit board and a second circuit board Of the first and second circuit boards, the circuit board close to the construction surface is arranged close to the construction surface, and the input terminal portion and the output terminal portion are coaxial connectors. The input terminal portion and the output terminal portion connected to the circuit board close to the construction surface of the first and second circuit boards extend to the portion along the construction surface and the construction surface side and are orthogonal to the circuit board. An L-shaped connection terminal composed of a portion connected to the circuit board is provided as a core part, and is electrically connected to the ground pattern of the circuit board in a form adjacent to both sides of the portion of the L-shaped connection terminal orthogonal to the circuit board. Protrusions with conductive properties are arrangedBy simply connecting each output terminal section and each receiving terminal side with a single cable, a plurality of received signals can be selectively selected and received on each receiving terminal side. Become. As a result, indoor wiring work is facilitated, and there is no need to provide a separate switch. Moreover, the input terminal section and output terminal sectionTogaIn each direction perpendicular to the construction surfaceDivided into two groups of positionsTherefore, the projection area onto the construction surface in the range where the input terminal portion and the output terminal portion are respectively arranged can be made relatively small, and as a result, there is an advantage that the mounting area becomes small.Furthermore, circuit components can be distributed and mounted on each circuit board, and the mounting area can be reduced. The input terminal portion and the output terminal portion connected to the circuit board close to the construction surface of the first and second circuit boards include an L-shaped connection terminal as a core wire portion. Because the circuit board close to the construction surface can be close to the construction surface, the area of the third circuit board can be increased, and the number of circuit components that can be mounted on the third circuit board is increased. Thus, the number of circuit components on the first circuit board and the second circuit board can be reduced, and as a result, the mounting area can be reduced. Furthermore, since the L-shaped connection terminals are adjacent to both sides of the portion orthogonal to the circuit board, conductive protrusions that are electrically connected to the ground pattern are disposed. There is an advantage that a stable electromagnetic field state can be secured around the terminals.
[0047]
  Claim2The invention of claim1And a connection member for connecting at least one of the ground pattern of the first circuit board, the ground pattern of the second circuit board, and the housing, and the ground pattern of the third circuit board. There is an advantage that the reception signal can be prevented from leaking through each ground pattern.
[0048]
  Claim3The invention of claim1Or claim2Since the distribution circuit is mounted on the third circuit board, the received signal does not reciprocate between the first circuit board and the second circuit board, and the circuit configuration can be simplified and attached. There is an advantage that the area can be reduced.
[0049]
  Claim4The invention of claim1Claim3In this embodiment, since the groove portion into which the end portion of the third circuit board is inserted and held is formed on the inner peripheral surface of the casing, the third circuit board, the first circuit board, and the second circuit board As a result, the third circuit board can be easily attached and the quality of the equipment and the work efficiency during manufacturing and assembly can be improved.
[0050]
  Claim5The invention of claim1Claim4In,in frontSince the input terminal part and the output terminal part are arranged in a part close to the edge away from the construction surface, it is easy to attach the cable to each input terminal part and each output terminal part, and the construction work is efficient. There is an advantage that can be made.
[0053]
  Claim6The invention of claim1 to 5The protrusion protrudes from the housing, and a screw hole into which a fixing screw inserted into the circuit board is screwed is formed on the front end surface of the protrusion, thereby grounding the second circuit board. Reinforced, protrusion and screw baseWhenThere is an advantage that the quality of equipment can be improved and the mounting area can be reduced.
[0054]
  Claim7The invention of claim 1 to claim 16In the case where a ground pattern is formed between two signal line patterns in each circuit board and a ground pattern is formed between the housing and the signal line pattern, Since the ground pattern non-formation part is provided in the part surrounded by the pattern, there is an advantage that it is possible to suppress the leakage of the reception signal through the ground pattern.
[0055]
  Claim8The invention of claim7Since the impedance element for connecting a part of the ground pattern surrounding the non-pattern forming portion is provided, it is possible to secure the noise resistance characteristic by the ground pattern and to suppress the leakage of the received signal through the ground pattern. There is an advantage.
[Brief description of the drawings]
FIG. 1 shows an embodiment of the present invention, (a) is a front view showing a stepped portion where an input terminal portion of a switching distributor is formed, (b) is a top view of the same, and (c) is the same as above. It is a front view which shows the step part in which this output terminal part was formed, (d) It is a side view same as the above.
FIG. 2 is a circuit diagram showing the switching distributor of the above.
FIG. 3 is a connection diagram showing an example of a CS broadcast receiving system using the above switching distributor.
FIG. 4 is a circuit diagram showing an amplifier circuit unit used in the above.
FIG. 5 is a circuit diagram showing a distribution circuit unit used in the above.
FIG. 6 is a circuit diagram showing a first circuit board provided on the upper surface side of the switching distributor.
FIG. 7 is a circuit diagram of a second circuit board provided on the mounting surface side.
FIG. 8 is a circuit diagram of a third circuit board provided in a direction orthogonal to the mounting surface of the same.
9A is a front view of a connecting portion of the first circuit board and the third circuit board by a connector as viewed from the mounting surface side, and FIG. 9B is a first circuit board with the mounting surface facing upward. It is the side view which looked at the connector with a 3rd circuit board, (c) It is a side view same as the above.
10A is a front view of a grounding piece connecting the ground pattern formed on the first circuit board, the ground pattern formed on the third circuit board, and the metal housing, as viewed from the bottom side. FIG. (B) It is a side view same as the above.
FIG. 11 is a perspective view showing a grounding piece of a concave groove for fixing a third circuit board, a ground pattern of the first circuit board, and a ground pattern of the third circuit board.
12 (a) is a front view of the projection of the switching distributor as viewed from the bottom surface side, (b) is a front view of the projection when the bottom surface of the switching distributor is turned up, and (c) the same as above. (D) It is a perspective view same as the above.
13A is a top view of a ground pattern non-forming portion formed on a circuit board, and FIG. 13B is a cross-sectional view of the same.
[Explanation of symbols]
3a-3d Input terminal
5a-5c 2 distribution circuit section
6 Switching circuit
7a-7d Output terminal
8 Case
11a First circuit board
11b Second circuit board
11c Third circuit board
12A core wire
13 Metal enclosure
14 groove
15 Ground plate
18 Ground pattern non-formation part
19 Impedance element
20a Protrusion
20b Protrusion

Claims

A plurality of input terminal units to which a plurality of systems of received signals are respectively input, a plurality of output terminal units to which a plurality of receiving terminals for receiving and processing radio waves from satellites are respectively connected, and from each input terminal unit A plurality of distribution circuits for distributing received signals respectively, and a switching circuit that is provided in the same number as the distribution circuits and that selects the output of one distribution circuit from all the distribution circuits in response to an instruction from the receiving terminal. And the input terminal portion and the output terminal portion are respectively orthogonal to the surface of the outer surface of the housing that contacts the construction surface. The surface on which the input terminal part is provided is a staircase surface provided with a step in a direction away from the construction surface, and each staircase surface is provided with an input terminal part for output. Terminal part is arranged The surface is a staircase surface provided with a step in a direction away from the work surface separately from the staircase surface on which the input terminal portion is disposed, and each staircase surface is provided with an output terminal portion, and the input terminal portion and the output terminal The parts are divided into two different positions in a direction orthogonal to the construction surface, and the input terminal portion and the output terminal portion of each group are connected to each other and arranged in two layers along the construction surface. A printed circuit board composed of the printed circuit board, and a printed circuit board disposed between the first circuit board and the second circuit board so as to be orthogonal to both circuit boards and electrically connected to both circuit boards. A third circuit board is provided, the first and second circuit boards are arranged along the construction surface, and the circuit board close to the construction surface of the first and second circuit boards is close to the construction surface The input terminal portion and the output The terminal part is a coaxial connector, and the input terminal part and the output terminal part connected to the circuit board close to the construction surface of the first and second circuit boards extend to the construction surface side and the construction surface side. An L-shaped connection terminal comprising a portion that is orthogonal to the circuit board and connected to the circuit board is provided as a core wire portion, and adjacent to both sides of a portion of the L-shaped connection terminal that is orthogonal to the circuit board. A switching distributor having a conductive protrusion connected to a ground pattern of a circuit board .

A connection member that connects at least one of the ground pattern of the first circuit board, the ground pattern of the second circuit board, and the housing, and the ground pattern of the third circuit board is provided. The switching distributor according to claim 1.

3. The switching distributor according to claim 1, wherein a distribution circuit is mounted on the third circuit board .

The switching distribution according to any one of claims 1 to 3, wherein a groove portion into which an end portion of the third circuit board is inserted and held is formed on an inner peripheral surface of the casing. vessel.

Switching distributor according to any one of claims 1 to 4 wherein the input terminal portion and the output terminal portion is characterized in that it is disposed in a portion close to the edge away from the construction surface.

The protrusion protrudes from the housing, according to claim 1 to claim, characterized in that threaded holes in which the projections fixing screw inserted through the circuit board on the distal end surface of is screwed is formed 5 The switching distributor according to any one of the above.

When a ground pattern is formed between two signal line patterns on each circuit board and when a ground pattern is formed between the housing and the signal line pattern, switching distributor according to any one of claims 1 to 6, characterized in that the enclosed portion is provided a grounding pattern-free portion.

8. The switching distributor according to claim 7, further comprising an impedance element for connecting a part of the ground pattern surrounding the non-pattern forming portion .