Title :
Generation of optimal distribution sets for single-ring cylindrical arc arrays
Author :
Brann, C.W. ; Virga, K.L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Arizona Univ., Tucson, AZ, USA
Abstract :
An important class of conformal array antennas for modern military and commercial communications systems is a single-ring arc array. In arc arrays, the array synthesis must be performed for a partial sector of the entire cylindrical array. Cylindrical arc array pattern synthesis is complicated because the apparent spacing between the elements at various observation angles is not equal nor constant with angle. The element and array factors are not always separable and therefore the pattern function is not a simple polynomial. This precludes the use of the mature linear array synthesis methods that have allowed one to conveniently link polynomial-based distribution functions for linear arrays to their pattern performance. To obtain the distribution functions, a design program based upon genetic algorithm (GA) optimization was developed. The emphasis of this paper is not the development of the best GA, but the utilization of GA in generating the optimal distribution sets to understand the physics behind are arrays. The GA optimizes the array amplitude and phase coefficients, given the array radius, the total number of elements around the entire ring, and the number of exited elements.
Keywords :
antenna arrays; antenna radiation patterns; conformal antennas; genetic algorithms; military communication; amplitude coefficients; array factors; array pattern synthesis; array radius; commercial communications systems; conformal array antennas; design program; distribution functions; elements spacing; exited elements; genetic algorithm optimization; military communications systems; observation angles; optimal distribution sets generation; partial sector; pattern performance; phase coefficients; single-ring cylindrical arc arrays; Algorithm design and analysis; Antenna arrays; Design optimization; Distribution functions; Genetic algorithms; Military communication; Phased arrays; Physics; Polynomials;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1998. IEEE
Conference_Location :
Atlanta, GA, USA
Print_ISBN :
0-7803-4478-2
DOI :
10.1109/APS.1998.702043