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雙向器
EntityQ1266530· pop 16· linked from 40 articles

A duplexer is an electronic device that allows bi-directional (duplex) communication over a single path. In radar and radio communications systems, it isolates the receiver from the transmitter while permitting them to share a common antenna. Most radio repeater systems include a duplexer. Duplexers can be based on frequency (often a waveguide filter), polarization (such as an orthomode transducer), or timing (as is typical in radar).

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Duplexers
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Article · 中文

雙向器是一種通訊系統元件,用來區隔在同一傳輸路徑上的發射和接放訊號,一般具有三個埠,在不同的應用可以由不同的元件所構成。在收發同頻的系統上,像是雷達系統,通常會使用環行器作為其雙向器,而在時間分隔的系統中,如GSM,則會使用一個高速的電子開關(Switch)來進行收發路徑的切換。雙向器品質決定於插入損耗及收發端隔離度,高損耗會降低系統性能,而低隔離度則可能造成接收機承受過大的發射訊號,造成元件損壞。 另外要特別注意的是,雙向器(Duplexer)基本上是雙工器(Diplexer)的一種,而兩者的區別在於雙工器的三個埠不一定是通道、上行、下行的組合,有可能是用來讓兩個上行或兩個下行共享傳輸路徑。

Abstract from DBpedia / Wikipedia · CC BY-SA

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