Title :
Loss compensated high-Q tunable basspass filter using microstrip ring resonators
Author :
Jia Chen ; Luong Ngoc Quyen ; Xiaowei Zhu
Author_Institution :
Sch. of Inf. Sci. & Eng., Southeast Univ., Nanjing, China
Abstract :
A loss compensated tunable bandpass filter based on varactor-tuned microstrip square ring resonators is presented, which has a tuning range of 698-802MHz and steep skirt frequency response. The filter employs a PHEMT ATF34143 with appropriate feedback elements acting as a negative resistance circuit which not only reduces the insertion loss but also increases Q-factor significantly. According to the simulation results, the filter has a 3-dB fractional bandwidth of 1% and an insertion loss of about 6.8dB.
Keywords :
Q-factor; band-pass filters; microstrip resonators; varactors; PHEMT ATF34143; Q-factor; feedback elements; frequency 698 MHz to 802 MHz; high-Q tunable bandpass filter; insertion loss; microstrip ring resonators; negative resistance circuit; varactor-tuned microstrip square ring resonators; Band pass filters; Bandwidth; Filtering theory; Insertion loss; Microwave filters; Optical ring resonators; Resonator filters; loss compensation; microstrip square ring resonator; tunable filter; varactor;
Conference_Titel :
Advanced Technologies for Communications (ATC), 2011 International Conference on
Conference_Location :
Da Nang
Print_ISBN :
978-1-4577-1206-7
DOI :
10.1109/ATC.2011.6027464
