Superconducting Coplanar Interdigital Filter With Robust Packaging

Author

Mohebbi, Hamid Reza ; Benningshof, Olaf W. B. ; Taminiau, Ivar A. J. ; Guo-Xing Miao ; Cory, David G.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Waterloo, Waterloo, ON, Canada

Volume

25

Issue

3

fYear

2015

fDate

Jun-15

Firstpage

1

Lastpage

4

Abstract

A superconducting three-pole Chebyshev band-pass filter is designed, fabricated and tested to be used in microwave set-up in Cryogenic refrigerator. The design is based on the reflected group delay method and it is implemented based on the interdigital configuration in a coplanar waveguide with Niobium (Nb) over Sapphire dielectric. The filter response based on the circuit model (lumped element, J-inverter and coupling matrix synthesis), full wave simulation of its physical realization and s-parameter measurement are compared. With the proper packaging this filter shows only one band-pass from 9.7 GHz to 10.5 GHz over a large span of frequency from 0 GHz to 20 GHz.

Keywords

Chebyshev filters; S-parameters; UHF filters; band-pass filters; coplanar waveguides; cryogenics; lumped parameter networks; microwave filters; niobium; refrigeration; superconducting filters; type II superconductors; J-inverter model; Nb; circuit model; coplanar waveguide; coupling matrix synthesis; cryogenic refrigerator; filter response; frequency 0 GHz to 20 GHz; full wave simulation; interdigital configuration; lumped element model; microwave set-up; reflected group delay method; robust packaging; s-parameter measurement; superconducting coplanar interdigital filter; superconducting three-pole Chebyshev band-pass filter; Band-pass filters; Microwave circuits; Microwave filters; Resonator filters; Superconducting filters; Superconducting microwave devices; Band-pass filters; CPW filters; Chebyshev filters; Interdigital filters; Ness method; Reflected group delay method; Superconducting microwave filters; interdigital filters; reflected group delay method; superconducting microwave filters;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2014.2377246

Filename

6975140