Title :
Ku-band microstrip diplexer based on dual behavior resonator filter
Author :
Manchec, Alexandre ; Rius, Eric ; Quendo, Cedric ; Person, Christian ; Favennec, Jean François ; Moroni, Pascal ; Cayrou, Jean Christophe ; Cazaux, Jean Louis
Author_Institution :
LEST-UMR CNRS, Brest, France
Abstract :
This report describes the design of original planar filters and of a diplexer based on dual behavior resonator (DBR) filter, and introduces measurement data. The specifications dealt with a limited frequency band in Ku-band where a high isolation is needed between Rx and Tx frequency bands. This study evidences the benefits of oversized DBR in particular for getting a high rejection level. Moreover, folding the oversized resonators allows one to keep constant the filter overall size. The first DBR filter for the Ku-band receiver is of 3rd-order with a central, folded, oversized and low-frequency stub; the second DBR filter for the Ku-band transmitter is also of 3rd-order with three folded, oversized and high-frequency stubs. Then, a diplexer as presented in Rhodes and Ievy (1979) and Matthanei et al. (1980) was realized from both filters as stated in Goron et al. (2003) and Tudosie and Vahlieck (2004).
Keywords :
band-pass filters; microstrip filters; microwave receivers; multiplexing equipment; resonator filters; 3rd order DBR filters; Ku-band microstrip diplexer; Ku-band receivers; Ku-band transmitter; Rx-Tx isolation; dual behavior resonator filters; microwave bandpass filters; planar diplexers; planar filters; Attenuation; Band pass filters; Distributed Bragg reflectors; Frequency; Insertion loss; Microstrip filters; Microstrip resonators; Microwave filters; Resonator filters; Topology;
Conference_Titel :
Microwave Symposium Digest, 2005 IEEE MTT-S International
Print_ISBN :
0-7803-8845-3
DOI :
10.1109/MWSYM.2005.1516648