Superconducting patch array antenna on both-side YBCO thin film for satellite communication

Citation
Mi. Ali et al., Superconducting patch array antenna on both-side YBCO thin film for satellite communication, IEEE APPL S, 9(2), 1999, pp. 3077-3080
Citations number
13
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
ISSN journal
1051-8223 → ACNP
Volume
9
Issue
2
Year of publication
1999
Part
3
Pages
3077 - 3080
Database
ISI
SICI code
1051-8223(199906)9:2<3077:SPAAOB>2.0.ZU;2-Z
Abstract
Investigated results on direct-fed circularly polarized (CP) microstrip ant ennas for "Direct Broadcast Satellite" (DBS) system at 12 GHz have been rep orted. A full wave microwave circuit simulator based on the method of momen ts and capable of handling the microwave surface impedance was used in theo retical analysis of the antennas. Antennas were fabricated from both normal conductor (copper) and superconductor (YBCO) for comparison The measured r esults on resonant frequency; return loss, gain, bandwidth and axial ratio have been presented along with some design data, The antennas showed good a xial ratio and bandwidth. In the comparison of gain, superconducting antenn as showed a remarkable improvement over their metal counterparts. The gain of a 4 element array fabricated on both-side superconducting film was found 3.6 dB higher than that of copper array. Therefore, this antenna configura tion is expected to be used in DBS system.