DocumentCode :
3113891
Title :
Green´s function for a planar phased sectoral array of dipoles: synthesis via canonical constituents
Author :
Capolino, F. ; Maci, S. ; Felsen, L.B.
Author_Institution :
Dept. of Inf. Eng., Siena Univ., Italy
Volume :
4
fYear :
1999
fDate :
11-16 July 1999
Firstpage :
2496
Abstract :
The EM modeling of large phased arrays is a topic of increasing interest. One objective is to reduce the numerical effort that accompanies an element-by-element full-wave analysis based on integral equations which are structured around the ordinary free space Green´s function; when applied to a periodic array this array Green´s function is composed of the sum over the individual dipole radiations. As an alternative, we explore replacement of the element-by-element Green´s function by the array Green´s function (AGF) which represents the collective field radiated by the elementary dipoles. The efficient calculation of the AGF is accomplished via a Floquet wave (FW) representation. With this representation, the wave radiation from, or scattering by, finite phased arrays is interpreted as the radiation from a superposition of continuous equivalent FW-matched source distributions extending over the entire finite array aperture. The asymptotic treatment of each FW sectoral aperture distribution leads to a FW that is truncated at the array edges, plus FW-modulated diffracted contributions from the edges and vertex of the array. This approach is extended here to a right-angle sectoral planar phased array of dipoles which is the basic constituent for the treatment of planar rectangular arrays.
Keywords :
Green´s function methods; antenna phased arrays; antenna theory; dipole antenna arrays; integral equations; planar antenna arrays; EM modeling; FW-modulated diffracted contributions; Floquet wave; Green´s function; array Green´s function; asymptotic treatment; canonical constituents; collective field radiate; continuous equivalent FW-matched source distributions; elementary dipoles; finite array aperture; finite phased arrays; large phased arrays; planar phased sectoral array; planar rectangular arrays; representation; right-angle sectoral planar phased array; scattering; synthesis; wave radiation; Aerospace engineering; Aerospace industry; Apertures; Diffraction; Electromagnetic modeling; Green´s function methods; Integral equations; Magnetic separation; Mechanical engineering; Phased arrays;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Antennas and Propagation Society International Symposium, 1999. IEEE
Conference_Location :
Orlando, FL, USA
Print_ISBN :
0-7803-5639-x
Type :
conf
DOI :
10.1109/APS.1999.789316
Filename :
789316
Link To Document :
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