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 ( $\\omega _{b}^{2} \\gg \\omega ^{2}$ ). 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 $\\omega _{p}$ , and the collision frequency $\\upsilon$ , by varying $\\omega _{b}$ and $\\omega$ .

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