CPW-Fed Dual-Mode Double-Square-Ring Resonators for Quad-Band Filters

Author

Liu, Ji-Chyun ; Wang, Jhih-Wei ; Zeng, Bing-Hao ; Chang, Dau-Chyrh

Author_Institution

Electr. Eng. Dept., Ching Yun Univ., Taoyuan, Taiwan

Volume

20

Issue

3

fYear

2010

fDate

3/1/2010 12:00:00 AM

Firstpage

142

Lastpage

144

Abstract

We propose the improved CPW-fed configurations with dual-mode double-square-ring resonators (DMDSRR) for quad-band applications. The resonant frequency equations of DMDSRR are introduced for simply designing quad-band bandpass filter (BPF). Resonant frequencies can be controlled by tuning the perimeter ratio of the square rings. To obtain lower insertion loss, higher out-of-band rejection level and wider bandwidth of quad-band, the improved CPW-fed and dual-mode perturbations are designed. The proposed filter is successfully simulated and measured. It can be applied to 0.95, 1.26, 1.89 and 2.29 GHz systems.

Keywords

UHF filters; band-pass filters; coplanar waveguides; resonator filters; CPW-fed dual-mode double-square-ring resonator; dual-mode perturbations; frequency 0.95 GHz; frequency 1.26 GHz; frequency 1.89 GHz; frequency 2.29 GHz; high out-of-band rejection level; insertion loss; quad-band bandpass filter; resonant frequency equations; Double square ring resonator (DSRR); dual- mode; quad-band;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2010.2040211

Filename

5398851