Critical currents in a high-T/sub c/ superconducting short dipole antenna

Measurements on a liquid-nitrogen-cooled, superconducting short-dipole aerial at 550 MHz are presented. The measured relative field strength as a function of frequency is shown for an excitation current well below the critical value. The field strength is shown as a function of frequency for input p...

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Bibliographic Details
Published inIEEE transactions on magnetics Vol. 25; no. 2; pp. 1313 - 1314
Main Authors Gough, C.E., Khamas, S.K., Maclean, T.S.M., Mehler, M.J., Alford, N.M., Harmer, M.M.
Format Journal Article
LanguageEnglish
Published IEEE 01.03.1989
Subjects
Antenna measurements
Antenna theory
Critical current
Dipole antennas
Frequency
Nitrogen
Superconducting filaments and wires
Surface resistance
Temperature
Yttrium barium copper oxide
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Summary:Measurements on a liquid-nitrogen-cooled, superconducting short-dipole aerial at 550 MHz are presented. The measured relative field strength as a function of frequency is shown for an excitation current well below the critical value. The field strength is shown as a function of frequency for input powers of 25 dBm, 28 dBm, and 31 dBm. An estimate of the RF critical current is made from deviations in linearity with input power.< >
ISSN:0018-9464
1941-0069
DOI:10.1109/20.92536