Design of an S-Band HTS Filter With High Power Capability

Author

Dandan Bai ; Xiaofeng He ; Xueqiang Zhang ; Hong Li ; Qiang Zhang ; Chunguang Li ; Yusheng He

Author_Institution

Beijing Nat. Lab. for Condensed Matter Phys., Inst. of Phys., Beijing, China

Volume

23

Issue

6

fYear

2013

fDate

Dec. 2013

Firstpage

14

Lastpage

18

Abstract

A ten-pole S-band high-temperature superconducting filter with excellent frequency response and high power capability is reported in this paper. The filter was fabricated on a 3-in-diameter 0.5-mm-thick LaAlO₃ wafer with double-sided YBCO films. The filter has 4.8% fractional bandwidth centered at 2.15 GHz. The return loss is better than 15 dB, and the out-of-band rejection is better than 80 dB. The power handling capability of the filter was evaluated using a sweep measurement method. The filter has handled 33 dBm (2 W) of input power with no measurable performance degradation over the whole band at 60 K. Furthermore, the in-band (2.11-2.19 GHz) power handling capability of the filter is up to 35.8 dBm (3.8 W) at 60 K.

Keywords

UHF filters; frequency response; high-temperature superconductors; microwave filters; resonator filters; superconducting filters; superconducting microwave devices; yttrium compounds; S-band HTS filter; YBCO; double-sided YBCO films; frequency response; high power capability; out-of-band rejection; power handling capability; ten-pole S-band high-temperature superconducting filter; Couplings; Current density; Feeds; High-temperature superconductors; Physics; Power measurement; Superconducting microwave devices; High power; high-temperature superconducting (HTS) filter; straight-line half-wavelength resonator;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2013.2277776

Filename

6609080