Design of a High-Power Superconducting Filter With Novel DGS Structures

Author

Tianning Zheng ; Bin Wei ; Bisong Cao ; Xubo Guo ; Xiaoping Zhang ; Dan Wang ; Cheng Feng ; Zhan Xu ; Zhaojiang Shang

Author_Institution

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

Volume

24

Issue

6

fYear

2014

fDate

Dec. 2014

Firstpage

1

Lastpage

5

Abstract

A novel defected ground structure (DGS) resonator with improved power handling capability is proposed in this paper. The current density distribution of the DGS resonator is simulated and compared with that of the complete ground structure (CGS) resonator. Simulation shows that the maximum current density of the DGS resonator is lower than that of the CGS resonator. Two four-pole bandpass high-temperature superconducting filters centered at 2.9 GHz with a fractional bandwidth of nearly 1.5% are designed and fabricated using the DGS and CGS resonators, respectively. The measured maximum handling power is 37.3 dBm for the DGS filter at 77 K, which is higher than that of 34.1 dBm for the CGS filter.

Keywords

band-pass filters; current density; current distribution; defected ground structures; superconducting filters; superconducting resonators; complete ground structure; current density distribution; defected ground structure resonator; four-pole bandpass high-temperature superconducting filters; high-power superconducting filter; power handling capability; Band-pass filters; Current density; High-temperature superconductors; Microwave filters; Resonator filters; Superconducting filters; Bandpass filter; defected ground structure (DGS); high-temperature superconducting (HTS) filter; power handling capability;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2014.2321976

Filename

6810165