A new technique of transforming the probe uncompensated near-field data to the near or far field is presented, which is useful in nearfield antenna measurements, when the probe antenna scans over an arbitrary surface enclosing the test antenna. The technique presented is analytically simple and sufficiently accurate. © 1985 IEEE

M. S. Narasimhan

ANTENNAS, SCANNING - MEASUREMENTS

SURFACES - MAGNETIC PROPERTIES

NEAR-FIELD ANTENNA MEASUREMENTS

PROBE UNCOMPENSATED NEAR-FIELD DATA

Electromagnetic fields

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IIT Madras

Probe uncompensated near-field to far-field transformation for scanning over an arbitrary surface

IEEE Transactions on Antennas and Propagation

An efficient technique for probe-directivity uncompensated spherical near-field to far-field (NF-FF) transformation is presented. The technique proposed does not make use of the spherical vector wave functions (SVWF) in the conventional manner, but seeks to obtain the NF-FF transformation exactly, viewing it as an electromagnetic scattering problem. The problem is formulated by considering the NF-FF transformation, when the FF observation points are restricted to a single ϕ plane at a time. The analytical expressions derived toward this end assume a considerably simplified form offering a high computational efficiency. The proposed technique is validated by considering arrays as test antennas with a maximum dimension of 150 X. Based on the principles employed for the spherical NF-FF transformation, an efficient technique for computing the FF patterns of a perfectly conducting scatterer illuminated by an arbitrary source using the technique of physical optics (PO) is also developed. In order to validate this, typical numerical computations are performed and the results obtained are discussed. © 1989 IEEE

An Efficient Technique for Spherical Near-Field to Far-Field Transformation and Evaluation of Far Fields of Perfectly Conducting Scatterers

An analytical technique for predicting accurately the near (electric and magnetic) fields as well as the far fields of a reflector antenna with a pencil beam is presented. The technique proposed involves the near-field geometrical theory of diffraction (GTD) analysis of reflector antennas developed earlier and spherical vector mode functions. The proposed technique does not place any restriction on the range of polar angles or radial distances of the observation point. It is demonstrated that the technique proposed can predict the fields radiated by the reflector with greater accuracy by comparing the calculated results with the available measured results. A few important applications of the analysis proposed are also highlighted. © 1984 IEEE

A New Method of Analysis of the Near and Far Fields of Paraboloidal Reflectors

Electromagnetic Theory

Electromagnetic Anisotropy and Bianisotropy

Dyadic Green Functions

IEEE Antennas and Propagation Magazine

AP-RASC'10: Call for Papers

Confined zone dispersion flue gas desulfurization demonstration. [Numerical data only; no text]

Probe Uncompensated Near-Field to Far-Field Transformation for Scanning Over an Arbitrary Surface

Journal	IEEE Transactions on Antennas and Propagation
ISSN	0018926X
Open Access	No