Accession Number:

ADA238626

Title:

Displacement Errors in the Antenna Near-Field Measurements and Their Effect on the Far Field

Descriptive Note:

Technical note

Corporate Author:

NATIONAL BUREAU OF STANDARDS GAITHERSBURG MD

Personal Author(s):

Report Date:

1986-10-01

Pagination or Media Count:

37.0

Abstract:

The effects of probe displacement errors in the near-field measurement procedure on the far-field spectrum are studied. Expressions are derived for the displacement error functions that maximize the fractional error in spectrum both for the on-axis and off-axis directions. Planar x-y and z- displacement errors the studied first and, consequently, the results are generalized to errors in spherical scanning. Some simple near-field models are used to obtain order of magnitude estimates for the fractional error as a function of relevant scale lengths of near field, defined as the lengths over which significant variations occur.

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE