An Improved Equivalent Circuit Model for CSRR-Based Bandpass Filter Design With Even and Odd Modes

Author

Liu, Ji-Chyun ; Lin, Hsieh-Chih ; Zeng, Bing-Hao ; Yeh, Kuan-Dih ; Chang, Dau-Chyrh

Author_Institution

Electr. Eng. Dept., Ching Yun Univ., Chung-Li, Taiwan

Volume

20

Issue

4

fYear

2010

fDate

4/1/2010 12:00:00 AM

Firstpage

193

Lastpage

195

Abstract

We present a new equivalent circuit model that incorporates the resonances and transmission zeros in terms of even and odd modes for CSRR-based bandpass filter (BPF) design. The circuit model and three resonance characteristics are consistent with the geometry of the CSRR-based BPF. The variations of distance ratio, related gap and loop number are investigated. The good performance of lower insertion loss (0.87 dB), deeper and symmetric transmission zero level (- 53.20 dB) , wider bandwidth (fractional BW 89.4%) and wider stopband (extended to 2.9 f₀ below - 28.5 dB rejection level) at the central frequency f₀ = 1.88 GHz are achieved by this methodology.

Keywords

band-pass filters; equivalent circuits; resonator filters; CSRR; bandpass filter design; complementary split-ring resonator; equivalent circuit model; frequency 1.88 GHz; insertion loss; loss 0.87 dB; resonance characteristics; split-ring resonator; transmission zero level; Bandpass filter (BPF); complementary split-ring resonator (CSSR); even and odd modes;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2010.2042548

Filename

5422910