Gg. Cook et al., EFFICIENCIES OF SUPERCONDUCTING SMALL ANTENNAS CONNECTED TO LOSSLESS DISKS OVER LOSSY GROUNDPLANES, IEEE transactions on antennas and propagation, 43(6), 1995, pp. 631-633
Superconducting electrically small monopoles and half loops over lossy
groundplanes with perfectly conducting disks attached to their bases
are modeled using a moment method incorporating Sommerfeld-type integr
als. It is shown that improved efficiency is obtainable by incorporati
ng these disks, compared with cases where the antennas are connected d
irectly to the groundplanes.