Accession Number : AD0830043

Title :   COMPATIBILITY STUDIES. VOLUME VIII. APPENDIX VII. EXPERIMENTAL HARMONIC ANALYSIS OF AN ARRAY ANTENNA.

Descriptive Note : Final rept. Apr 64-Nov 67,

Corporate Author : MOORE SCHOOL OF ELECTRICAL ENGINEERING PHILADELPHIA PA

Personal Author(s) : Salati, O. M. ; Kritikos, H. N. ; Lang, K. C. ; Yen, P. C. H.

Report Date : FEB 1968

Pagination or Media Count : 86

Abstract : An experimental analysis has been made of the harmonic performance of a half-wave dipole element fed by a balun from a coaxial transmission line. The impedance of 10 presumably identical elements was measured over a five to one frequency range in free space. The impedance of one element was measured over a large ground plane. The coupling impedance was measured between dipole pairs separated by a half-wave length for parallel, end fire and 45 degree orientations when mounted on the ground plane. The impedance of the center element of a 3 x 3 array was also measured over the five to one frequency range. Patterns of the center element of a 3 x 3 array (the other elements terminated in short circuits or 50 ohm loads) were measured over a five to one frequency range. The performance of the presumably identical antennas was found to vary considerably even in the design band. At harmonic frequencies the variation was sufficiently great as to suggest that such measurements may be meaningless. (Author)

Descriptors :   (*PHASED ARRAYS, HARMONIC ANALYSIS), ANTENNA RADIATION PATTERNS, DIPOLE ANTENNAS, COUPLING CIRCUITS, ELECTRICAL IMPEDANCE, ANTENNA ARRAYS, MEASUREMENT, ELECTROMAGNETIC COMPATIBILITY.

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE