Dual-Band Balun Bandpass Filter With Hybrid Structure

Author

Huang, Guo-Shu ; Chen, Chun Hsiung

Author_Institution

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

Volume

21

Issue

7

fYear

2011

fDate

7/1/2011 12:00:00 AM

Firstpage

356

Lastpage

358

Abstract

Dual-band balanced-to-unbalanced (balun) bandpass filter (BPF) is proposed, using the hybrid structure with resonators implemented on the upper microstrip plane and bottom coplanar-waveguide (CPW) plane, respectively. By providing two coupling paths through microstrip and CPW planes, one may separately control the two passbands and also increase the freedom in filter design. The implemented dual-band balun BPF centered at 2.4 and 5.4 GHz shows the desired filtering performance with good amplitude and phase imbalances, which are less than 0.13/0.08 dB and 0.82°/1.65° in the two passbands, respectively.

Keywords

baluns; band-pass filters; coplanar waveguides; microstrip filters; microwave filters; resonator filters; coplanar-waveguide plane; dual-band balanced-to-unbalanced bandpass filter; dual-band balun bandpass filter; frequency 2.4 GHz; frequency 5.4 GHz; hybrid structure; microstrip plane; resonator; Band pass filters; Coplanar waveguides; Dual band; Impedance matching; Microstrip; Passband; Resonant frequency; Bandpass filter (BPF); dual-band balanced-to-unbalanced (balun);

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2011.2144965

Filename

5871299