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Fabrication and Characterization of Miniaturized HTS Microstrip Antennas Using "H"-type Resonator  

정동철 (우석대학교 정보통신컴퓨터공학부)
윤창훈 (우석대학교 정보통신컴퓨터공학부)
황종선 (담양대학 컴퓨터응용전기시스템 공학과)
최창주 (조선대학교 전기공학과)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers C / v.52, no.7, 2003 , pp. 282-287 More about this Journal
Abstract
″H″ type resonator has the advantage for the miniaturization of high-T7 superconducting (HTS) microstrip antenna in comparison with the conventional microstrip antenna such as rectangular type or circular type. In this paper we designed miniaturized HTS antennas using this "H"-type resonator and reported the characteristics of our antennas including return loss, bandwidth, radiation patterns, efficiency and so on. To fabricate the "H" type antenna, HTS YBa$_2$Cu$_3$$O_{7-x}$ (YBCO) thin films were deposited on MgO substrates using rf-magnetron sputtering. For comparison between normal conducting antennas and superconducting antennas, the gold antennas with the same dimension were also fabricated. An aperture coupling was used for impedance matching between 50 $\Omega$ feed line and HTS radiating patch. The ″H" type superconducting antenna showed the performance of 1.38 in SWR, 26 % in efficiency, and 13.8 dB in the return loss superior to the normal conducting counterpart.
Keywords
HTS antennas; YBCO film; H-type resonator; radiation patterns;
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