Open AccessMicrostrip bandpass single‐pole quadruple‐throw switch and independently switchable quadruplexer
Author(s) -
Weng SzChi,
Hsu KoWen,
Tu WenHua
Publication year - 2014
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2013.0198
Subject(s) - stopband , passband , band pass filter , microstrip , resonator , topology (electrical circuits) , electronic circuit , insertion loss , optoelectronics , electronic engineering , materials science , physics , electrical engineering , engineering
Two switchable microstrip bandpass circuits are investigated. Owing to the low loading effect from the distributed coupling technique, many channels are obtained without a complicated matching network. Each passband can be turned on and off independently. Both the bandpass single‐pole quadruple‐throw switch and the switchable quadruplexer consisting of asymmetrical quarter‐wavelength resonators, shunt open stubs and p‐i‐n diodes feature compactness, high isolation and wide stopband. The isolation is better than 35 dB, and the 20‐dB stopband extends up to 13 times of the lowest operation centre frequency. To validate this design concept, theory as well as experiment are presented and compared.