Duplexer for Simultaneous Transmit and Receive Radar Systems

An enhanced duplexer ( 1 ) which includes a combination of high dynamic range (HDR) amplifiers ( 11, 17 ) and a naovel signal cancellation circuit topology ( 15 ). Return signals from the circulator ( 3 ) are fed into the first HDR amplifier ( 11 ). A portion of the transmit signal is sampled with a...

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Bibliographische Detailangaben
Hauptverfasser:	MEHARRY DAVID E, HEDGES STEPHEN A
Format:	Patent
Sprache:	eng
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION TESTING
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Beschreibung
Zusammenfassung:	An enhanced duplexer ( 1 ) which includes a combination of high dynamic range (HDR) amplifiers ( 11, 17 ) and a naovel signal cancellation circuit topology ( 15 ). Return signals from the circulator ( 3 ) are fed into the first HDR amplifier ( 11 ). A portion of the transmit signal is sampled with a directional coupler ( 7 ) and amplified with a second HDR amplifier ( 17 ) and then combined with the output of the first HDR amplifier ( 11 ) using a second directional coupler ( 13 ). The gain and phase of the second io amplifier ( 17 ) are adjusted so the leakage signals are canceled ( 19, 21 ) to enable a radar system to simultaneously transmit and receive signals to and from an antenna with increased sensitivity of operation.