Applications of probe-compensated near-field measurements

Abstract

3 79 the effects of probe positioning errors present but a few additional opportunities for further theoretical developments in probe compensated near-field measurements. REFERENCES D. M. Kerns, "Correction of near-field antenna measurements made with an arbitrary but known measuring antenna," Electron.Abstrocr-The theory of near-field measurements for antenna practitioners is summarized, and the measurement procedures in three coordinate systems, namely rectangular, cylindrical, and spherical are outlined. Specific topics include probe characterization, measurement systems, data reduction, and attendant accuracies. The results of recent studies are also summarized, and some brief remarks on future applications of near-field measurements in the laboratory, the production line, and in field testing and evaluation conclude the paper. JOY et al. : APPLICATIONS OF NEAR-FIELD MEASUREMENTS

Evaluation of Bistatic Far-Field Quantities from Near-Field Measurements

“…In fact, the probe has its own radiation pattern and the wave illuminated by a horn is not a plane wave but a spherical wave. Techniques for probes pattern compensation have been proposed for antenna near field measurements [1]. These techniques can also be applied to this problem.…”

“…The relation between near-field measurements and far-field pattern can be established by using the plane wave expansions [1][2][3]. Consider Fig.…”

“…Several near-field measurement techniques have been proposed to predict far-field antenna patterns [1][2][3]. In these techniques, the radiated field is measured by a small probe scanning over a large aperture.…”

Antenna Pattern Reconstruction Directly From Nonredundant Near-Field Measurements Collected by a Cylindrical Facility

“…The NF-FF transformation with cylindrical scanning [6][7][8][9][10][11][12][13][14] is particularly attractive when dealing with antennas that concentrate the electromagnetic (EM) radiation in an angular region centred on the horizontal plane, as those employed for radio base stations. In fact, unlike the planar scannings, it allows the reconstruction of the antenna complete radiation pattern save for the angular regions nearby the spherical polar angles, although with a slight increase in the analytical and computational complexity.…”

RCS Prediction From Planar Near-Field Measurements

“…In contrast, in the low frequency domain, it is more difficult to realize the far-field condition [2], since the dimension of anechoic chambers is generally less than the near-field/far-field boundary. In order to overcome this problem, several methods based on the concept of near-field/far-field transformation [3][4][5][6][7] have been proposed. The key idea behind these methods is to consider the target as an antenna under test (AUT) [8].…”