An HTS lumped-element notch filter

Author

Dustakar, Krishnaveni ; Berkowitz, Stuart

Author_Institution

Supercond. Technol. Inc., Sunnyvale, CA, USA

Volume

1

fYear

2004

fDate

6-11 June 2004

Firstpage

127

Abstract

This paper presents the measured results of an ultra-deep (90dB) HTS lumped-element notch filter matched over an octave-wide frequency range, which represents a previously unrealized portion of notch filter parameter space. The filter was realized using a seven-pole quasi-elliptic design and was fabricated in an HTS microstrip configuration. The fabricated notch filter has a stop bandwidth of 3 MHz, a 3 dB pass bandwidth of 8 MHz, and a center frequency of 1.03 GHz. The filter is well matched from 900 MHz to 1500 MHz with a 16 dB return loss. The passband noise figure was 0.3 dB. The measured data shows that the fabricated filter closely conforms to the simulation.

Keywords

high-temperature superconductors; notch filters; superconducting filters; superconducting resonators; 0.3 dB; 1.03 GHz; 16 dB; 3 MHz; 8 MHz; 900 to 1500 MHz; HTS lumped element notch filter; HTS resonators; high temperature superconductors; microstrip configuration; notch filter parameter space; octave-wide frequency range; quasielliptic design; superconducting filters; Band pass filters; Chebyshev approximation; Degradation; Frequency; High temperature superconductors; Matched filters; Passband; Resonator filters; Superconducting filters; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2004 IEEE MTT-S International

ISSN

0149-645X

Print_ISBN

0-7803-8331-1

Type

conf

DOI

10.1109/MWSYM.2004.1335820

Filename

1335820