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

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-displa...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 1988-05, Vol.36 (5), p.581-581
Main Author: Muth, L.A.
Format: Article
Language:English
Subjects:
Antenna measurements
Antennas
Applied sciences
Computer errors
Displacement measurement
Exact sciences and technology
Fourier transforms
Genetic expression
Geometry
Position measurement
Probes
Radiocommunications
Receiving antennas
Telecommunications
Telecommunications and information theory
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Summary: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.< >
ISSN:0018-926X
1558-2221
DOI:10.1109/8.192133