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Feed-through null
Feed-through null follows the duplexer and is commonly used with continuous-wave radar to improve performance.
==Definition==
The transmitter is constantly issuing high power RF with continuous wave radar. Some of the transmit signal will leak into the receiver when the receive antenna is near the transmit antenna.
The signal that leaks from the transmitter to the receiver is called bleed-through. Electronic circuits have limited dynamic range, and this reduces receiver sensitivity.
Feed-through nulling significantly reduces the bleed-through signal, which can be used to increase receiver sensitivity in continuous wave radar.〔(【引用サイトリンク】title=Carrier Feed-through Nulling in Millimeter Wave Continuous Wave Radar——Theoretical Analysis and System Simulation )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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