Mobile QR Code QR CODE : The Transactions of the Korean Institute of Electrical Engineers
Title Fabrication and Characterization of Miniaturized HTS Microstrip Antennas Using "H"-type Resonator
Authors 정동철 ; 윤창훈 ; 황종선 ; 최창주
Page pp.282-287
ISSN 1975-8359
Keywords HTS antennas ; YBCO film ; H-type resonator ; radiation patterns
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_2Cu_3O_{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 Ω 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.