| 摘要 |
<p>An apparatus for transmitting/receiving a switch in a TDD(Time Division Duplex) wireless communication system is provided to protect an LNA(Low Noise Amplifier) from a high frequency transmitting signal by providing the isolation between transmitting and receiving paths. Two hybrid couplers(410,416) which are perpendicular to each other are outputted into two ports by being divided into two signals having phase difference of 90‹ among four input/output ports. The hybrid couplers couples the two signals, then differentiates the ports, which outputs the combined signal, according to the phase difference of two signals. The phase changing units(412,428) are connected between those two hybrid couplers.</p> |
