Interdigital duplexer with notch resonators

Details Interdigital duplexer with notch resonators Interdigital duplexer with notch resonators

H - Electricity

01

P

333/63

H01P 1/205 (2006.01) H01P 1/213 (2006.01)

Patent

CA 1245310

Abstract A duplexer includes an integral interdigital transmitter filter and parallel interdigital receiver filter in a common housing. A three-quarter wavelength antenna transformer section couples rf energy from the transmitter filter to an antenna and also couples rf energy from the antenna to the receiver filter and to an antenna cable connector. The receiver filter selectivity is improved by providing a notch resonator between a receiver transformer section and the housing, and the transmitter filter selectivity is improved by providing a notch resonator between a transmitter resonator and the housing.

508597

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