Accession Number : AD0676846

Title :   COMPACT CHAMBER FOR IMPEDANCE AND POWER TESTING OF VHF WHIP ANTENNAS.

Descriptive Note : Final rept. 1 Jul 67-1 Jul 68,

Corporate Author : GEORGIA INST OF TECH ATLANTA ENGINEERING EXPERIMENT STATION

Personal Author(s) : Free,William R. ; Jenkins,Bernard M. ; Stuckey,Charles W.

Report Date : OCT 1968

Pagination or Media Count : 111

Abstract : The report summarizes the accomplishments on a program to develop a compact test chamber suitable for production testing of VHF vehicular antennas. A compact test chamber consisting of a 12 foot long aluminum cylinder, 1 foot in diameter and lined with Eccosorb NZ-1 ferrite material was developed. This chamber was calibrated with respect to open-field antenna characteristics. Results from an extensive evaluation are presented which attest to the usefulness of the chamber in meeting production and/or field test and alignment requirements. Investigations of the reflectivity characteristics of a number of absorbing materials, the effects of absorbing materials in the near-field of antennas, and the effects of ground plane size on antenna characteristics are described and results from these programs are presented. (Author)

Descriptors :   (*GROUND VEHICLE ANTENNAS, *TEST FACILITIES), VERY HIGH FREQUENCY, ELECTRICAL IMPEDANCE, FERRITES, ABSORPTION, CERAMIC MATERIALS, REFLECTIVITY, PERMEABILITY, ELECTROMAGNETIC RADIATION

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE