An indirect holographic method for determining antenna radiation patterns and imaging antenna fields

Smith, Dave, Leach, Mark and Sambell, Alistair (2002) An indirect holographic method for determining antenna radiation patterns and imaging antenna fields. IEEE Antennas and Propagation Society, AP-S International Symposium (Digest), 3. pp. 706-709. ISSN 1522 3965

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Abstract

This work describes a new technique for the determination of antenna radiation patterns and the imaging of antenna aperture fields. It uses an indirect holographic method to record simple intensity patterns formed by a combination of antenna near field signal and an offset reference signal and is similar to methods employed at optical frequencies. This is as an alternative to the traditional direct holographic method of measuring complex amplitude and phase values. It outlines how previous practical difficulties, which have prevented this method being usefully employed at microwave frequencies, can be overcome by the synthesis of an offset reference plane wave. It describes how far field antenna radiation patterns can be obtained from knowledge of the resultant intensity pattern and how the information contained within this pattern can be further processed to provide images of the antenna aperture fields. It includes the results of mathematical simulations which strongly support the ideas outlined. Currently an experimental system is being assembled to provide practical measurements. It is envisaged that preliminary experimental results will be available shortly.

Item Type: Article
Subjects: H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Physics and Electrical Engineering
Depositing User: Becky Skoyles
Date Deposited: 12 Feb 2015 16:17
Last Modified: 10 Aug 2015 11:38
URI: http://nrl.northumbria.ac.uk/id/eprint/19360

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