A compact two-pole X-band high-temperature superconducting microstrip filter

Author

Oh, B. ; Kim, H.T. ; Choi, Y.H. ; Moon, S.H. ; Hur, P.H. ; Kim, M. ; Lee, S.Y. ; Denisov, A.G.

Author_Institution

Goldstar Central Res. Lab., Seoul, South Korea

Volume

5

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

2667

Lastpage

2670

Abstract

In this paper we examine a microstrip line filter with three gaps separated by approximately a quarter wavelength. Two filters, one with gold and the other with YBCO were fabricated. The thickness of top conducting microstrips was 600 nm. The ground plane under the 0.5 mm-thick lanthanum aluminate (LaAlO/sub 3/) substrate was implemented with a 2 micron-thick gold layer for both filters. These filters showed similar frequency responses with 5% 3-dB bandwidth. The insertion loss, however, improved from 2.8 dB to 1.5 dB by using the superconductor. The performance of the filter was also tested by employing the three dimensional microwave FEM software, and the simulation result compared well with the measured data.<>

Keywords

barium compounds; electron device manufacture; frequency response; high-temperature superconductors; microstrip filters; superconducting microwave devices; yttrium compounds; 0.5 mm; 1.5 dB; 11.2 GHz; 2 mum; 600 nm; Au; Au layer; LaAlO/sub 3/; LaAlO/sub 3/ substrate; YBa/sub 2/Cu/sub 3/O/sub 7/; YBaCuO filter; film deposition; frequency response; ground plane; insertion loss; microstrip line filter; patterning; three dimensional microwave FEM software; two-pole X-band HTSC microstrip filter; Bandwidth; Frequency; Gold; High temperature superconductors; Lanthanum; Microstrip filters; Microwave filters; Superconducting filters; Superconducting microwave devices; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.403139

Filename

403139