An HTS Wideband Filter Using Interdigital-Like Resonators at UHF Band

Author

Li, Mingjie ; Zhang, Xiaoping ; Wei, Bin ; Cao, Bisong ; Jin, Shichao ; Guo, Xubo ; Zhang, Ying ; Lu, Xinxiang ; Peng, Huili ; Gao, Baoxin

Author_Institution

Dept. of Phys., Tsinghua Univ., Beijing, China

Volume

19

Issue

11

fYear

2009

Firstpage

704

Lastpage

706

Abstract

A wideband superconducting interdigital-like filter at UHF band has been successfully designed and fabricated. An interdigital-like resonator is proposed to realize both strong coupling and compact size. A ten-pole demonstration high temperature superconducting filter is developed with a center frequency of approximately 340 MHz and a fractional bandwidth of 26%. The measurements show that the insertion loss of the filter is less than 0.2 dB, the return loss is better than 17 dB, and the out-of-band rejection is better than 70 dB.

Keywords

UHF filters; band-pass filters; high-temperature electronics; high-temperature superconductors; resonator filters; HTS wideband filter; UHF band; bandpass filters; fractional bandwidth; out-of-band rejection; return loss; ten-pole demonstration high temperature superconducting filter; wideband superconducting interdigital-like filter; Bandpass filters (BPFs); high temperature superconducting (HTS); microstrip; wideband;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2009.2032008

Filename

5290099