A New Quad-Band Bandpass Filter Using Asymmetric Stepped Impedance Resonators

Author

Wu, Hung-Wei ; Yang, Ru-Yuan

Author_Institution

Dept. of Comput. & Commun., Kun Shan Univ., Tainan, Taiwan

Volume

21

Issue

4

fYear

2011

fDate

4/1/2011 12:00:00 AM

Firstpage

203

Lastpage

205

Abstract

A new quad-band microstrip bandpass filter (BPF) using asymmetric stepped impedance resonators (SIRs) is proposed. The filter only employs two sets of the asymmetric SIRs. One set is designed to operate at the first and third passbands (2.4/5.2 GHz) and the other set is employed at second and fourth passbands (3.5/6.8 GHz). By tuning the impedance and length ratios of the asymmetric SIRs, a multi-band filter can be easily achieved. This study provides a simple and effective method to design a quad-band filter with low insertion loss and compact size. Experimental verification is provided and good agreement has been found between simulation and measurement.

Keywords

band-pass filters; impedance matching; microstrip filters; resonator filters; BPF; SIR; asymmetric stepped impedance resonators; compact size; experimental verification; impedance tuning; insertion loss; length ratios; multiband filter; passbands; quad-band bandpass filter; quad-band microstrip bandpass filter; Band pass filters; Couplings; Frequency measurement; Impedance; Insertion loss; Passband; Wireless communication; Asymmetric; bandpass filter (BPF); quad-band; stepped impedance resonator (SIR);

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2011.2106153

Filename

5728872