Accession Number : ADA136199

Title :   Antenna Pattern Measurements to Characterize the Out-of-Band Behavior of Reflector Antennas.

Descriptive Note : Final technical rept. 21 Dec 80-30 Sep 81,

Corporate Author : ELECTROMAGNETIC COMPATIBILITY ANALYSIS CENTER ANNAPOLIS MD

Personal Author(s) : Cown,B J ; Weaver,E E ; Ryan,C E , Jr

PDF Url : ADA136199

Report Date : Dec 1983

Pagination or Media Count : 106

Abstract : Research was conducted to collect and describe out-of-band antenna pattern data. The research efforts were devoted (1) to deriving valid measured data for a reflector antenna for out-of-band frequencies spanning intervals around the second and third harmonics of the in-band design frequency and (2) to statistically characterize the measured data. The second harmonic data were collected for both polarization senses for the out-of-band frequencies of 5.5 GHz to 7.5 GHz in steps of 0.1 GHz. The third harmonic data were collected for both polarization senses for the out-of-band frequencies of 8.0 GHz to 10.0 GHz in steps of 0.1 GHz. Additionally, in-band data were collected at 2.9, 3.0, and 3.1 GHz for both polarization senses. The measured data were collected on the Georgia Tech compact antenna range test facility with the aid of an automated data logger system designed expressly for efficient collection of broadband antenna data. The pattern data, recorded directly on magnetic disks, were analyzed (1) to compute average gain and standard deviation over selected angular sectors, (2) to construct cumulative probability curves, and (3) to specify the peak gain and the angular coordinates of the peak at each frequency.

Descriptors :   *Antenna radiation patterns, Electromagnetic compatibility, Antenna feeds, Parabolic antennas, Cross polarization, Harmonics

Subject Categories : Electrical and Electronic Equipment
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE