Title :
Switched fragmented aperture antennas
Author :
Maloney, J.C. ; Kesler, M.P. ; Lust, L.M. ; Pringle, L.N. ; Fountain, T.L. ; Harms, P.H. ; Smith, G.S.
Author_Institution :
Signature Technol. Lab., Georgia Tech. Res. Inst., Atlanta, GA, USA
Abstract :
This paper introduces a reconfigurable aperture concept derived from fragmented aperture design where the configuration of the fragmented aperture may be switched by the user to obtain different functionalities. A fragmented aperture antenna is a patchwork of discrete conducting and dielectric units distributed over the specified aperture. The arrangement of the units is determined using an efficient, multistage procedure that incorporates the genetic algorithm for optimization and the finite-difference time-domain method for the electromagnetic computation. Typically, the criterion for optimum performance has been broadband gain at a particular angle. The resulting antennas contain isolated scattering structures that are fragmented in appearance.
Keywords :
finite difference time-domain analysis; genetic algorithms; microstrip antenna arrays; antenna array; broadband gain; discrete conducting units; discrete dielectric units; electromagnetic computation; finite-difference time-domain method; fragmented aperture design; genetic algorithm; in-band measured antenna pattern; isolated scattering structures; multistage procedure; optimization; reconfigurable aperture; switched fragmented aperture antennas; Antenna measurements; Aperture antennas; Bandwidth; Dielectrics; Genetic algorithms; Magnetic switching; Optimization methods; Performance gain; Switches; Testing;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2000. IEEE
Conference_Location :
Salt Lake City, UT, USA
Print_ISBN :
0-7803-6369-8
DOI :
10.1109/APS.2000.873823
