DocumentCode :
891259
Title :
A complete procedure for the design and optimization of arbitrarily shaped integrated lens antennas
Author :
Sauleau, Ronan ; Barès, B.
Author_Institution :
Groupe Antennes et Hyperfrequences, Univ. de Rennes, France
Volume :
54
Issue :
4
fYear :
2006
fDate :
4/1/2006 12:00:00 AM
Firstpage :
1122
Lastpage :
1133
Abstract :
This paper proposes a new design methodology of arbitrarily shaped integrated lens antennas (ILAs). First, we describe the design principles and numerical techniques of the optimization iterative loop. The starting lens shape, deduced from a general synthesis method based on geometrical optics principles, is optimized so that the radiation pattern of the ILA complies with an arbitrary amplitude-shaped template. The optimization procedure is local and is based on a multidimensional conjugate gradient method. Then, the capabilities and potentialities of this approach are demonstrated numerically using two examples. In the first one, an ILA radiating a secant-squared beam in one principal plane and a flat-top beam in the orthogonal plane is designed for indoor communications in V-band. In the second example (Gaussian/flat-top beam), we show for the first time that the joint optimization of the feed together with the lens shape is a very promising design methodology. Finally, our design tools are validated experimentally in Q-band through the synthesis and optimization of a peculiar small shaped ILA (28 mm×28 mm×15 mm) fed by an aperture-coupled microstrip patch antenna.
Keywords :
antenna feeds; antenna radiation patterns; conjugate gradient methods; geometrical optics; indoor communication; iterative methods; lens antennas; loop antennas; microstrip antennas; millimetre wave antennas; ILA optimization; Q-band; V-band; aperture-coupled microstrip patch antenna; geometrical optics principle; indoor communication; integrated lens antenna feed; iterative loop; multidimensional conjugate gradient method; radiation pattern; secant-squared beam; Antenna radiation patterns; Design methodology; Design optimization; Geometrical optics; Gradient methods; Lenses; Multidimensional systems; Optical design; Optimization methods; Shape; Geometrical optics; integrated lens antennas; lens antennas; millimeter wave; physical optics; shaped beam; substrate lenses; surface optimization;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.2006.872563
Filename :
1614168
Link To Document :
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