DocumentCode :
3591023
Title :
Radiation characteristics of slot antennas covered with a plasma slab in the presence of a static magnetic field perpendicular to the slot
Author :
Hodara, H.
Author_Institution :
The Hallicrafters Company, Chicago, IL, USA
Volume :
10
fYear :
1966
Firstpage :
81
Lastpage :
98
Abstract :
It is shown that the presence of a gyrotropic lossless plasma slab covering a rectangular slot radiator does not alter significantly the radiation pattern in the vertical plane when the static magnetic field is perpendicular to the slot. The plasma covered antenna remains omnidirectional and the radiated power is not significantly reduced when the cyclotron frequency exceeds the operating frequency by one order of magnitude ( 
). It is also found that the matching between the antenna and its surrounding is sharply improved, if the antenna is covered with such a slab, at critical combinations of the plasma slab parameters and the operating frequency; this finding may be useful for plasma diagnostics, in order to determine the slab width L, the plasma frequency 
, and the collision frequency 
, by varying 
and 
.
). It is also found that the matching between the antenna and its surrounding is sharply improved, if the antenna is covered with such a slab, at critical combinations of the plasma slab parameters and the operating frequency; this finding may be useful for plasma diagnostics, in order to determine the slab width L, the plasma frequency , and the collision frequency , by varying and .Keywords :
Antenna radiation patterns; Frequency; Geometry; Gyrotropism; Magnetic fields; Partial differential equations; Plasma diagnostics; Plasma properties; Slabs; Slot antennas;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
1958 IRE International Convention Record
Type :
conf
DOI :
10.1109/IRECON.1962.1147023
Filename :
1147023
Link To Document :
