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

fYear

2011

fDate

2-4 Aug. 2011

Firstpage

191

Lastpage

194

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Advanced Technologies for Communications (ATC), 2011 International Conference on

Conference_Location

Da Nang

ISSN

2162-1020

Print_ISBN

978-1-4577-1206-7

Type

conf

DOI

10.1109/ATC.2011.6027464

Filename

6027464