Parallel-Coupled Coplanar-Waveguide Bandpass Filter With Multiple Transmission Zeros

Author

Wu, Chao-Huang ; Wang, Chi-Hsueh ; Lin, Yo-Shen ; Chen, Chun Hsiung

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei

Volume

17

Issue

2

fYear

2007

Firstpage

118

Lastpage

120

Abstract

A compact parallel-coupled coplanar-waveguide bandpass filter with good selectivity and stopband response is proposed. By using the quarter-wavelength resonators in implementation, the filter size can be reduced and no spurious passband is observed at twice the center frequency (2f₀). In addition, by suitably introducing the capacitive and inductive cross-coupling effects, four transmission zeros around the passband edges may be created for improving the filter selectivity. For design purpose, the equivalent-circuit models are also established. In this study, the compact fourth-order filter with multiple transmission zeros for improving the selectivity is implemented, and its stopband is extended up to 3.43f₀ with a rejection better than -30dB

Keywords

band-pass filters; coplanar waveguide components; poles and zeros; BPF; CPW; bandpass filter; coplanar waveguide; coupled lines; multiple transmission zeros; parallel coupling; Band pass filters; Chaotic communication; Coplanar waveguides; Coupling circuits; Fabrication; Filtering theory; Frequency; Microstrip filters; Passband; Resonator filters; Bandpass filter (BPF); coplanar waveguide (CPW); coupled lines;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2006.890334

Filename

4079630