The Transactions of the Korean Institute of Electrical Engineers C (대한전기학회논문지:전기물성ㆍ응용부문C)

The Korean Institute of Electrical Engineers (대한전기학회)
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Fabrication and Characterization of Miniaturized HTS Microstrip Antennas Using "H"-type Resonator

H 형태 공진기를 이용한 소형화된 HTS 안테나의 제작 및 특성 해석

  • 정동철 (우석대학교 정보통신컴퓨터공학부) ;
  • 윤창훈 (우석대학교 정보통신컴퓨터공학부) ;
  • 황종선 (담양대학 컴퓨터응용전기시스템 공학과) ;
  • 최창주 (조선대학교 전기공학과)
  • Published : 2003.07.01
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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

References

  1. Dong-Caul Chung, Kyung-Kuk Park, Sung'-Jin Park, Byoung -Sung Han and jong-Sun Hwang,' Comparison Between High-To Superconducting Microstrip Filters and Normal Conducting Counterparts', IEEE Trans on Applied supercond, vol. 9 no. 2 pp.3882-3885, 1999 https://doi.org/10.1109/77.783875
  2. M. A. Richard, K B. Bashin, P. C. Claspy, 'Superconducting microstrip antennas: an experimental comparison of two feeding methods,' IEEE Trans on Antenna and Propagation, vol. 41, No. 7, pp. 967-974 1993 https://doi.org/10.1109/8.237630
  3. J. D. Lacey, G. Drossos, L. E. Davis, T. W. Button and P. Smith,' Comparative study of miniaturized HTS microstrip H-shaped antennas with and without enhanced capacitance', Physica C, vol. 282-287, pp.2511-2512 1997 https://doi.org/10.1016/S0921-4534(97)01365-8
  4. S. Y. Lee, K Y. Kang, C. S. Yoon, E. H Lee, 'Processing of $YBa_2Cu_3O_{7-x}$ superconducting thin films for microwave device applications', proceeding of SPIE, vol. 2156, pp. 216-220, 1994 https://doi.org/10.1117/12.166158
  5. J. H Takemoto. F. K Oshita, H. R. Fetterman P. Korbin, and E. Sovoro, 'Microstrip ring resonator technique for measuring microwave attenuation in high--$T_c$ superconducting thin films.', IEEE Trans. Microwave Theory Tech, vol.37, pp.1650-1652 1989 https://doi.org/10.1109/22.41013
  6. I. J. Bahl & Bhatia, Microstrip antenna , Artech House, 1992
  7. T. Konaka, M. Sato, H. Asano, and S. Kubo, 'Relative permittivity and dielectric loss tangent of substrate materials for high-Tc superconducting film,' J. Superconductivity, vol. 4, no. 4, pp 283-288, 1991 https://doi.org/10.1007/BF00618150
  8. Dong-Chul Chung, et al, 'Anomalous microwave properties of nigh-T, superconducting microstrip antennas around the critical temperature', J. of Appl. Phys, vol. 8 no. 12 Dec. 1999 https://doi.org/10.1063/1.371813
  9. H. A. Wheeler, 'The radiansphere around a small antenna,' Proc. IRE, Vol. 47, pp. 1325-1331, Aug. 1959 https://doi.org/10.1109/JRPROC.1959.287198