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About:Passive repeater

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A passive repeater or passive radio link deflection, is a reflective or sometimes refractive panel or other object that assists in closing a radio or microwave link, in places where an obstacle in the signal path blocks any direct, line of sight communication. Similar systems are used also occasionally for TV relay transmitters or as tunnel transmitters. In these cases, a Yagi antenna receives the transmitted signal and supplies it by way of a coaxial cable to a second Yagi antenna.

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  • Eine passive Richtfunkumlenkung ist eine Anlage zur Verwirklichung einer Richtfunkverbindung, die aufgrund eines Hindernisses im Signalweg nicht auf direktem Wege wie bei einer Sichtverbindung möglich ist. Sie eignet sich besonders für hohe Frequenzen des UHF- und für das SHF-Band. (de)
  • A passive repeater or passive radio link deflection, is a reflective or sometimes refractive panel or other object that assists in closing a radio or microwave link, in places where an obstacle in the signal path blocks any direct, line of sight communication. Compared to a microwave radio relay station with active components, a passive repeater is far simpler and needs little maintenance and no on-site electric power. It also does not require additional frequencies, unlike active repeater stations which use different transmit and receive frequencies to prevent feedback. The corresponding disadvantage is that without amplification the returned signal is significantly weaker, although in some configurations they can actually provide gain of 100 to 130 dB for u.h.f. and microwave radio-relay stations. Passive radio relay link deflection systems in the vertical level can be realized by receiving the signal with a parabolic antenna and leading it through a waveguide to a second parabolic antenna, where it is radiated. For passive microwave radio relay link deflections in the horizontal plane, flat surfaces of metallic material are used, arranged so that the angle of incoming beam corresponds to the angle of the outcoming signal. The resulting structure resembles a billboard. Similar systems are used also occasionally for TV relay transmitters or as tunnel transmitters. In these cases, a Yagi antenna receives the transmitted signal and supplies it by way of a coaxial cable to a second Yagi antenna. (en)
  • 無給電中継装置(むきゅうでんちゅうけいそうち)とは、無線通信において、増幅装置を持たない中継装置である。パッシブリピータ(passive repeater)ともいう。 金属の板によって電波を反射させるものが主流だが、2基のパラボラアンテナを背中合わせに組み合わせ、片方のアンテナで受信した電波を導波管でもう片方のアンテナに伝送し放出する形式も存在する。いずれの場合も電波の指向性を利用しており、主に3GHzから30GHz帯の周波数で利用されている。電力が不要であるため、一般的な無線中継施設と比べると低いコストで建設することができる。 (ja)
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  • Eine passive Richtfunkumlenkung ist eine Anlage zur Verwirklichung einer Richtfunkverbindung, die aufgrund eines Hindernisses im Signalweg nicht auf direktem Wege wie bei einer Sichtverbindung möglich ist. Sie eignet sich besonders für hohe Frequenzen des UHF- und für das SHF-Band. (de)
  • 無給電中継装置(むきゅうでんちゅうけいそうち)とは、無線通信において、増幅装置を持たない中継装置である。パッシブリピータ(passive repeater)ともいう。 金属の板によって電波を反射させるものが主流だが、2基のパラボラアンテナを背中合わせに組み合わせ、片方のアンテナで受信した電波を導波管でもう片方のアンテナに伝送し放出する形式も存在する。いずれの場合も電波の指向性を利用しており、主に3GHzから30GHz帯の周波数で利用されている。電力が不要であるため、一般的な無線中継施設と比べると低いコストで建設することができる。 (ja)
  • A passive repeater or passive radio link deflection, is a reflective or sometimes refractive panel or other object that assists in closing a radio or microwave link, in places where an obstacle in the signal path blocks any direct, line of sight communication. Similar systems are used also occasionally for TV relay transmitters or as tunnel transmitters. In these cases, a Yagi antenna receives the transmitted signal and supplies it by way of a coaxial cable to a second Yagi antenna. (en)
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  • Passive Richtfunkumlenkung (de)
  • 無給電中継装置 (ja)
  • Passive repeater (en)
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