Accession Number : AD0766776

Title :   An Investigation of the Accuracy of Far-Field Radiation Patterns Determined from Near-Field Measurements,

Corporate Author : GEORGIA INST OF TECH ATLANTA

Personal Author(s) : Rodrigue,G. P. ; Joy,E. B. ; Burns,C. P.

Report Date : AUG 1973

Pagination or Media Count : 265

Abstract : The results reported show that far-field antenna patterns determined on the near-field range are as accurate as those determined on a far-field range. The patterns of a single plane, monopulse antenna, operated at 5.45 GHz were measured on a near-field range and two different far-field ranges, and detailed comparisons were made. The results of a computer-aided simulation study to determine the effects of various near-field measurement errors on the far-field patterns are also described. It was found that some near-field parameters are relatively critical; point source reflections are very deleterious. Far-field accuracy was found to be surprisingly insensitive to many near-field parameters. Comparisons of near-field and far-field techniques indicate several additional, non-technical, advantages of the near-field approach. Recommendations are made for future work to demonstrate the near-field technique on phased array antennas, and to improve the data processing procedures so as to increase the resolution of far-field patterns obtained from near-field measurements. (Author)

Descriptors :   (*ANTENNA RADIATION PATTERNS, MEASUREMENT), ACCURACY, ELECTROMAGNETIC FIELDS, ANTENNAS, NUMERICAL ANALYSIS

Subject Categories : Electrical and Electronic Equipment
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE