HTS Bandstop Filter for Radio Astronomy

Author

Pal, Srikanta ; Lancaster, Michael J. ; Norrod, Roger D.

Author_Institution

Dept. of Electron. & Commun. Eng., Birla Inst. of Technol., Ranchi, India

Volume

22

Issue

5

fYear

2012

fDate

5/1/2012 12:00:00 AM

Firstpage

236

Lastpage

238

Abstract

A novel miniaturized six-pole high temperature superconducting microstrip bandstop filter operating at S band is presented in this letter. A pseudo elliptical behavior in the frequency characteristic is introduced by designing the resonators to resonate at asynchronous frequencies and by varying the inter resonator phase difference. These filters have been installed in a cryogenic radio astronomy receiver with excellent results. Because of their sharp cut-off characteristics, the filters reduce satellite downlink interference signals by more than 40 dB while minimizing lost observing bandwidth.

Keywords

band-stop filters; cryogenic electronics; high-temperature superconductors; microstrip filters; radio receivers; radioastronomy; resonator filters; HTS bandstop filter; asynchronous frequency; cryogenic radio astronomy receiver; frequency characteristic; inter resonator phase difference; microstrip bandstop filter; miniaturized six-pole high temperature superconducting; pseudoelliptical behavior; satellite downlink interference signal; Bandwidth; High temperature superconductors; Microstrip; Power transmission lines; Radio astronomy; Receivers; Resonant frequency; Bandstop filter; high temperature superconducting (HTS); meanderline open loop resonator; radio astronomy;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2012.2193122

Filename

6184341