Title :
Reduction of spillover in the EISCAT VHF antenna using a corrugated soft shield
Author :
Moldsvor, A. ; Kildal, P.-S. ; Heck, S.
Author_Institution :
Chalmers Univ. of Technol., Gothenburg, Sweden
Abstract :
It is shown that a corrugated soft surface can be used to control the radiation pattern of the line feed of the EISCAT VHF antenna. This works well for both the longitudinal and transverse (orthogonal) polarization, showing that such a surface has polarization-independent properties. In the EISCAT VHF antenna case, a substantial spillover reduction is obtained, but at the expense of an overall efficiency reduction.<>
Keywords :
antenna radiation patterns; electromagnetic wave polarisation; electromagnetic wave scattering; radar antennas; reflector antennas; EISCAT VHF antenna; corrugated soft shield; corrugated soft surface; efficiency reduction; ionosphere; line feed; longitudinal polarisation; magnetosphere; orthogonal polarisation; radar antenna; radiation pattern control; spillover reduction; transverse polarisation; Aperture antennas; Corrugated surfaces; Dipole antennas; Earth; Feeds; Ionosphere; Magnetosphere; Polarization; Radar antennas; Reflector antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1992. AP-S. 1992 Digest. Held in Conjuction with: URSI Radio Science Meeting and Nuclear EMP Meeting., IEEE
Conference_Location :
Chicago, IL, USA
Print_ISBN :
0-7803-0730-5
DOI :
10.1109/APS.1992.221812
