Displacement errors in antenna near-field measurements and their effect on the far field

Author

Muth, Lorant A.

Author_Institution

NBS, Boulder, CO, USA

Volume

36

Issue

5

fYear

1988

fDate

5/1/1988 12:00:00 AM

Firstpage

581

Lastpage

581

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 the spectrum for both the on-axis and off-axis directions. The x- y- and z-displacement error in planar scanning are studied and 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 the near-field, defined as the lengths over which significant variations occur

Keywords

antenna radiation patterns; antenna theory; displacement measurement; electromagnetic fields; measurement errors; far-field spectrum; fractional error; near-field measurement procedure; order-of-magnitude estimates; planar scanning; probe displacement errors; scale lengths; spherical scanning; x-displacement error; y-displacement error; z-displacement error; Antenna measurements; Computer errors; Displacement measurement; Fourier transforms; Genetic expression; Geometry; Helium; Position measurement; Probes; Receiving antennas;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.192133

Filename

192133