Aperture blockage and truncation in scanning lens-reflector antennas

Thornton, J, Gregson, and Gray, D 2010, 'Aperture blockage and truncation in scanning lens-reflector antennas', IET Microwaves Antennas & Propagation, vol. 4, no. 7, pp. 828-836.


Document type: Journal Article
Collection: Journal Articles

Title Aperture blockage and truncation in scanning lens-reflector antennas
Author(s) Thornton, J
Gregson,
Gray, D
Year 2010
Journal name IET Microwaves Antennas & Propagation
Volume number 4
Issue number 7
Start page 828
End page 836
Total pages 9
Publisher The Institution of Engineering and Technology
Abstract A lens-reflector antenna comprises a hemispherical dielectric lens with a planar reflector. Beam scanning may be achieved by moving a primary feed around the fixed lens or by rotating the lens reflector with respect to a fixed feed. Truncation of the reflector and obstruction of the aperture by mechanical supports introduce scanning loss. These effects are analysed through a numerical technique where the spherical wave expansion method is used to populate an effective aperture matrix in the near field, which is then modified to account for shadowing effects. The results are verified by a measurement campaign using a scale model and by comparison with the commercial EM solver FEKO.
Keyword(s) Aperture blockage
Beam scanning
Dielectric lens
Effective aperture
matrix
Measurement campaign
Mechanical support
Near fields
Numerical techniques
Planar reflectors
Primary feeds
Reflector antennas
Scale models
Shadowing effects
Spherical wave expansion
DOI - identifier 10.1049/iet-map.2009.0283
Copyright notice © 2010 The Institution of Engineering and Technology
ISSN 1751-8725
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Created: Wed, 17 Nov 2010, 16:09:00 EST by Catalyst Administrator
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