Title :
Design and fabrication of YBCO patch antennas
Author :
Ohshimas, S. ; Ogasawara, T. ; Ehata, K.
Author_Institution :
Fac. of Eng., Yamagata Univ., Yonezawa, Japan
fDate :
6/1/1997 12:00:00 AM
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;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
