Admittance of an Aperture Antenna Radiating into a Warm Overdense Plasma Layer

摘要

The input impedance of an aperture radiating into a warm, overdense plasma layer is derived and studied. In the limit when the warm plasma layer is thin the author has found that the thin sheath approximation first obtained by Fante still holds, provided that in addition to the usual conditions, some additional simple constraints are satisfied. (Author)