Title :
Microwave frequency agile active filters for MIC and MMIC
Author :
Jiao, X.H. ; Guillon, P. ; Jarry, B. ; Madrangeas, B.
Author_Institution :
IRCOM-UA CNRS, Limoges Univ., France
Abstract :
Microwave-frequency agile active resonators which, in a planar structure, can be realized using microwave integrated circuit (MIC) or monolithic MIC (MMIC) technologies are presented. Consisting of modified hairpin resonator feedback by an amplifier and a phase shifter, these resonators offer extremely-low-loss and high-Q-value resonators. The use of varactors permits a tuning of the resonant frequency as well as the bandwidth. Using such resonator, a bandstop filter with a rejection of 45 dB and a lossless bandpass filter with a return loss of 35 dB have been obtained at 3.1 GHz.<>
Keywords :
MMIC; active filters; band-pass filters; band-stop filters; frequency agility; microwave filters; microwave integrated circuits; resonators; tuning; varactors; 3.1 GHz; 35 dB; MIC; MMIC; SHF; active filters; active resonators; amplifier; frequency agile; high-Q-value resonators; microwave integrated circuit; modified hairpin resonator feedback; phase shifter; planar structure; resonant frequency tuning; Active filters; Band pass filters; Feedback; Integrated circuit technology; MMICs; Microwave frequencies; Microwave integrated circuits; Microwave technology; Monolithic integrated circuits; Phase shifters;
Conference_Titel :
Microwave Symposium Digest, 1990., IEEE MTT-S International
Conference_Location :
Dallas, TX
DOI :
10.1109/MWSYM.1990.99629
