Title :
Critical currents in a high-Tc superconducting short dipole antenna
Author :
Gough, C.E. ; Khamas, S.K. ; Maclean, T.S.M. ; Mehler, M.J. ; Alford, N.McN. ; Harmer, M.M.
Author_Institution :
Birmingham Univ., UK
fDate :
3/1/1989 12:00:00 AM
Abstract :
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
Keywords :
barium compounds; critical currents; dipole antennas; high-temperature superconductors; superconducting junction devices; yttrium compounds; 550 MHz; RF critical current; YBa2Cu3Ox; excitation current; high temperature superconductor; input powers; relative field strength; superconducting short dipole antenna; Antenna measurements; Antenna theory; Critical current; Dipole antennas; Frequency; Nitrogen; Superconducting filaments and wires; Surface resistance; Temperature; Yttrium barium copper oxide;
Journal_Title :
Magnetics, IEEE Transactions on
