DocumentCode :
3605899
Title :
Optimization Procedure for Planar Leaky-Wave Antennas With Flat-Topped Radiation Patterns
Author :
Scattone, Francesco ; Ettorre, Mauro ; Sauleau, Ronan ; Ngoc Tinh Nguyen ; Fonseca, Nelson J. G.
Author_Institution :
Inst. d´Electron. et de Telecommun. de Rennes, Univ. of Rennes 1, Rennes, France
Volume :
63
Issue :
12
fYear :
2015
Firstpage :
5854
Lastpage :
5859
Abstract :
We describe here an optimization procedure to shape the radiation pattern of planar two-dimensional (2-D) leaky-wave antennas. The structures under investigation are superstrate configurations made by partially reflecting screens (impedances sheets) over a ground plane and excited by open-ended waveguides. The antenna configuration providing the required radiation pattern is obtained by resorting to an ad hoc optimization procedure that minimizes the mean squared error between the target pattern and the actual radiated far field. The radiated field is analytically evaluated using a Green´s function spectral approach to speed up the optimization process. Several kinds of radiation patterns can be obtained using the proposed algorithm. In this work, we focus our attention on flat-topped radiation patterns, suitable as element pattern for phased array antennas covering a limited angular field of view such as those considered for space applications. The proposed procedure is validated by full-wave results and measurements.
Keywords :
Green´s function methods; antenna radiation patterns; leaky wave antennas; planar antennas; waveguide antennas; 2D planar leaky-wave antennas; Green´s function spectral approach; ad hoc optimization procedure; flat-topped radiation patterns; ground plane; impedance sheets; mean squared error; open-ended waveguides; partially reflecting screens; phased array antennas; planar two-dimensional leaky-wave antennas; radiated far field; superstrate configurations; Antenna measurements; Antenna radiation patterns; Arrays; Chebyshev approximation; Dispersion; Impedance; Optimization; Leaky-wave antennas; pattern shaping; phased array antennas;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.2015.2479242
Filename :
7270284
Link To Document :
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