Accession Number : AD0775374

Title :   Investigation of Parasitic Loop Counterpoise Antennas and Their Application to VOR Systems.

Descriptive Note : Final rept. Aug 69-Oct 72,

Corporate Author : MICHIGAN UNIV ANN ARBOR DEPT OF ELECTRICAL AND COMPUTER ENGINEERING

Personal Author(s) : Sengupta,Dipak L. ; Ferris,Joseph E.

Report Date : DEC 1972

Pagination or Media Count : 158

Abstract : The radiation fields produced by conventional VOR and parastic loop counterpoise antennas were investigated both theoretically and experimentally. Theoretical expressions for the side band mode radiation fields produced by conventional VOR antennas were obtained by applying the concepts of geometrical theory of diffraction. Using similar techniques, expressions were obtained for both carrier and side band mode radiation fields produced by single parastic loop counterpoise antennas. It was found that for large separation distance between the parastic loops, the mutual coupling effects may be neglected during the evaluation of double parastic loop counterpoise antennas. (Modified author abstract)

Descriptors :   *Loop antennas, *Radio ranges, Very high frequency, Parasites, Antenna radiation patterns, Polarization

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE