Title :
Performance of a K-band superconducting gap-coupled microstrip antenna
Author :
Richard, M.A. ; Claspy, P.C.
Author_Institution :
Dept. of Electr. Eng. & Appl. Phys., Case Western Reserve Univ., Cleveland, OH, USA
Abstract :
Superconducting circular gap-coupled antennas at 26 GHz have been designed and fabricated on lanthanum aluminate substrate using a YBCO high-temperature superconducting thin film. The efficiencies and far-field antenna patterns have been measured and are compared with an identical antenna patterned with gold. The experimental far-field patterns agree well with published models, and efficiency measurements show a maximum improvement of 9% at 20 K in the efficiency of the HTSC antenna when compared to the gold antenna at the same temperature. Surface wave efficiency approximations show that the performance of these antennas is limited by surface wave losses.<>
Keywords :
antenna radiation patterns; boron compounds; high-temperature superconductors; microstrip antennas; superconducting thin films; yttrium compounds; 20 K; 26 GHz; Au antenna; HTSC antenna; K-band superconducting gap-coupled microstrip antenna; LaAlO/sub 3/ substrate; SHF; YBCO high-temperature superconducting thin film; YBaCuO; circular gap-coupled antennas; efficiency measurements; far-field antenna patterns; surface wave losses; Antenna measurements; Dielectric losses; Dielectric substrates; Gold; High temperature superconductors; K-band; Lanthanum; Microstrip antennas; Superconducting microwave devices; Yttrium barium copper oxide;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1992. AP-S. 1992 Digest. Held in Conjuction with: URSI Radio Science Meeting and Nuclear EMP Meeting., IEEE
Conference_Location :
Chicago, IL, USA
Print_ISBN :
0-7803-0730-5
DOI :
10.1109/APS.1992.221866
