Design and performance of miniaturized quarter-wavelength resonator bandpass filters with attenuation poles

Author

Kanaya, H. ; Kawakami, K. ; Koga, F. ; Kanda, Y. ; Yoshida, K.

Author_Institution

Dept. of Electron., Kyushu Univ., Fukuoka, Japan

Volume

15

Issue

2

fYear

2005

fDate

6/1/2005 12:00:00 AM

Firstpage

1016

Lastpage

1019

Abstract

For more size reduction of the high temperature superconducting coplanar waveguide (CPW) bandpass filter (BPF), we introduce the design method of the meanderline quarter-wavelength resonator BPF. The admittance and impedance inverters (J- and K-inverters) are realized by using interdigital gaps and meanderline short stubs. Also, we estimate the slope parameter of the meanderline resonator by using EM-simulator. In order to control the attenuation poles, we adjust the meanderline intervals and shapes of the cross-coupling section, so that we can design the frequency and number of the attenuation poles. The size of the 6-pole CPW quarter-wavelength resonator with two attenuation poles (center frequency = 2 GHz) was 3.5 × 8 mm.

Keywords

UHF filters; band-pass filters; coplanar waveguides; high-temperature superconductors; poles and zeros; resonator filters; superconducting filters; 2 GHz; 3.5 mm; 8 mm; EM-simulator; admittance inverters; attenuation poles; bandpass filters; high temperature superconducting coplanar waveguide; impedance inverters; interdigital gaps; meanderline resonator; meanderline short stubs; quarter-wavelength resonator; slope parameter; Admittance; Attenuation; Band pass filters; Coplanar waveguides; Design methodology; Frequency; High temperature superconductors; Impedance; Shape control; Superconducting filters; Attenuation pole; bandpass filter; coplanar waveguide; meanderline; quarter-wavelength resonator;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2005.850186

Filename

1439813