Accession Number:

ADA134192

Title:

Experimental Measurement of the Near-Fields of a UHF Horn Antenna

Descriptive Note:

Technical rept.

Corporate Author:

ARMY MISSILE COMMAND REDSTONE ARSENAL AL TEST AND EVALUATION DIRECTORATE

Personal Author(s):

Report Date:

1982-10-01

Pagination or Media Count:

140.0

Abstract:

The purpose of this report is to determine quantitatively some of the practical limitations of testing in the near field of UHF horns in particular, how near to the horn aperture is the field reasonably uniform in amplitude and phase for a given size test object. This report describes in detail near field measurements of both the electric E and magnetic H vectors from the aperture of a UHF horn out to a distance of 4.8 meters. These measurements encompass a rectangular volume of dimensions 2.4m x 3m x 4.8m. The data spatial separation i.e., spatial resolution is 0.1m in each orthogonal direction. The E and H field data is analyzed and displayed graphically. It is analyzed independently and combined to show the wave impedance behavior in the near zone. By observation of the data presented, one can immediately develop engineering guidelines for defining the useful test volume in the near zone of a UHF horn. Author.

Subject Categories:

  • Electrical and Electronic Equipment
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE