High Tc superconducting CPW bandstop filters for radio astronomy front ends

S. Wallage*, J. L. Tauritz, G. H. Tan, P. Hadley, J. E. Mooij

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

We have designed and tested a superconducting coplanar waveguide (CPW) bandstop filter consisting of 8 coupled line sections at a center frequency of 1. 53 GHz. A packaged 94. 7% bandwidth low pass Chebychev design yielded a filter with a center frequency of 1. 56 GHz less than 1. 2 dB insertion loss in the passband and better than 28 dB rejection at 20 Kelvin. With a skirt selectivity of 1. 53 (=BW1 dB/BW-28 dB) and low insertion loss this filter is an excellent candidate for suppressing contiguous spurious signals in cooled low-noise receiving front ends.

Original languageEnglish
Pages (from-to)3489-3491
Number of pages3
JournalIEEE transactions on applied superconductivity
Volume7
Issue number2 PART 3
Publication statusPublished - 1997
Externally publishedYes

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)

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