Microsoft Word - 79-46-50
نویسندگان
چکیده
In this paper one optimization heuristic search technique, Hybrid Evolutionary Programming (HEP) is applied to the process of synthesizing three-ring Concentric Circular Antenna Array (CCAA) focused on maximum sidelobe-level reduction. This paper assumes non-uniform excitations and uniform spacing of excitation elements in each three-ring CCAA design. Experimental results reveal that the design of non-uniformly excited CCAAs with optimal current excitations using the method of HEP provides a considerable sidelobe level reduction with respect to the uniform current excitation with d=λ/2 element-toelement spacing. Among the various CCAA designs, the design containing central element and 4, 6 and 8 elements in three successive concentric rings proves to be such global optimal design with global minimum SLL (-40.22 dB) as determined by HEP.
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Microsoft Word - Hakan SG2.docx
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