Design and diagnosis of a 5 GHz 10-pole HTS bandpass filter using CPW quarter-wavelength resonators

Author

Ma, Zhewang ; Suzuki, Hideyuki ; Kobayashi, Yoshio

Author_Institution

Dept. of Electr. & Electron. Syst., Saitama Univ., Japan

fYear

2002

fDate

17-19 Aug. 2002

Firstpage

279

Lastpage

282

Abstract

A high temperature superconductor (HTS) 5 GHz 10-pole bandpass filter (BPF) is designed by using coplanar waveguide (CPW) quarter-wavelength resonators. The 10-pole Chebyshev BPF has a center frequency 5.0 GHz and a fractional bandwidth of 3.2%. Based on an equivalent circuit with J- and K-inverters, the filter is first designed by using an EM simulator. Next an optimization algorithm is employed to diagnose the discrepancy between the filter response calculated by the EM simulator and the equivalent circuit. Adjustment of the dimensions of the filter is made thereby. The frequency response of the adjusted filter well satisfies the design specifications.

Keywords

Chebyshev filters; band-pass filters; circuit CAD; circuit optimisation; computational electromagnetics; coplanar waveguides; equivalent circuits; frequency response; high-temperature superconductors; microwave filters; resonators; 5 GHz; BPF fractional bandwidth; CPW quarter-wavelength resonators; Chebyshev BPF center frequency; EM simulator design; HTS bandpass filters; J/K-inverter equivalent circuit; calculated/equivalent circuit filter response discrepancy; coplanar waveguides; filter dimension adjustment; filter frequency response; high temperature superconductor multi-pole BPF; optimization algorithms; Band pass filters; Bandwidth; Chebyshev approximation; Circuit simulation; Coplanar waveguides; Equivalent circuits; Frequency; High temperature superconductors; Resonator filters; Superconducting filters;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave and Millimeter Wave Technology, 2002. Proceedings. ICMMT 2002. 2002 3rd International Conference on

Print_ISBN

0-7803-7486-X

Type

conf

DOI

10.1109/ICMMT.2002.1187690

Filename

1187690