Design and fabrication of YBCO patch antennas

Author

Ohshimas, S. ; Ogasawara, T. ; Ehata, K.

Author_Institution

Fac. of Eng., Yamagata Univ., Yonezawa, Japan

Volume

7

Issue

2

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

3060

Lastpage

3063

Abstract

We designed superconducting rectangular patch antennas which have a resonance frequency of 5 GHz and an input-impedance of 50 /spl Omega/. We used the transmission line model and the moment method to determine this patch antenna´s geometric form. We also fabricated the superconducting patch antennas of YBa2C3O7-y (YBCO) thin films and Cu films. The YBCO films were prepared by Helicon sputtering method. The input impedance and return loss of the YBCO patch antennas at 19 K were 50 /spl Omega/ and -35 dB, respectively. The return loss of the YBCO patch antenna was smaller than that of Cu patch antenna with the same geometry.

Keywords

barium compounds; electron device manufacture; high-temperature superconductors; method of moments; microstrip antennas; sputtered coatings; superconducting microwave devices; superconducting thin films; transmission line theory; yttrium compounds; -35 dB; 19 K; 5 GHz; 50 ohm; Cu; Cu film; Helicon sputtering; YBCO thin film; YBa/sub 2/Cu/sub 3/O/sub 7/; design; fabrication; input impedance; moment method; resonance frequency; return loss; superconducting rectangular patch antenna; transmission line model; Fabrication; Moment methods; Patch antennas; Resonance; Resonant frequency; Solid modeling; Sputtering; Superconducting films; Superconducting transmission lines; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.621978

Filename

621978