A UHF-Band Narrow-Band HTS Bandpass Filter With Wide Stopband Using Interdigital Structure

Author

Jingchen Wang ; Bin Wei ; Bisong Cao ; Xiaoping Zhang ; Xubo Guo ; Xiaoke Song

Author_Institution

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

Volume

23

Issue

6

fYear

2013

fDate

Dec. 2013

Firstpage

3

Lastpage

7

Abstract

In this paper, a novel resonator with modified interdigital fingers and vertical meander line is proposed. This resonator has a high first spurious frequency and is suitable for the design of a narrow-band filter with a wide stopband. A compact narrow-band six-pole high-temperature superconducting filter at the ultrahigh-frequency band is successfully designed and fabricated with this resonator. The measured out-of-band rejection is better than 75 dB up to 2600 MHz, which is as high as 5.2 times of the fundamental frequency.

Keywords

UHF filters; band-pass filters; band-stop filters; high-temperature superconductors; resonators; superconducting filters; UHF-band HTS bandpass filter; interdigital finger; interdigital structure; narrow-band HTS bandpass filter; out-of-band rejection; resonator; six-pole high-temperature superconducting filter; spurious frequency; ultrahigh-frequency band; vertical meander line; wide stopband; Couplings; Educational institutions; High-temperature superconductors; Microstrip; Physics; Resonant frequency; Superconducting microwave devices; High-temperature superconducting (HTS); interdigital structure resonator; narrow-band filter; wide stopband;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2013.2266401

Filename

6577908