Size and Weight Reduction of Integrated Lens Antennas Using a Cylindrical Air Cavity

A simple and low-cost solution to reduce the height and weight of extended hemispherical lenses is proposed based on the introduction of a cylindrical air cavity above the primary feed. The presence of an additional air-dielectric interface enables one to shorten the focal length of the lens, which...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2012-12, Vol.60 (12), p.5993-5998
Main Authors: Ngoc Tinh Nguyen, Rolland, A., Boriskin, A. V., Valerio, G., Le Coq, Laurent, Sauleau, R.
Format: Article
Language:English
Subjects:
Accuracy
Air cavity
Antenna measurements
Antennas
Applied sciences
Cavity resonators
dielectric lens antennas
Exact sciences and technology
extended hemispherical lenses
Holes
Lens antennas
Lenses
Materials
Permittivity
Prototypes
Radiocommunications
Reflection
size reduction
Telecommunications
Telecommunications and information theory
Weight reduction
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Description
Summary:A simple and low-cost solution to reduce the height and weight of extended hemispherical lenses is proposed based on the introduction of a cylindrical air cavity above the primary feed. The presence of an additional air-dielectric interface enables one to shorten the focal length of the lens, which leads to antenna height and weight reductions of 13% and 27%, respectively. The communication describes the design principle and performance characteristics of the reduced-size integrated lens antenna, superimposed with a conventional synthesized elliptical one. Both prototypes are fabricated in Rexolite and measured in Ka band. A good agreement between the performance characteristics of the antennas is observed. The additional advantages of the proposed approach are explained, and its applicability for lens antennas made of high-k materials is discussed.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2012.2208931