Title :
Thinned aperiodic linear phased array optimization for reduced grating lobes during scanning with input impedance bounds
Author :
Bray, M.G. ; Werner, D.H. ; Boeringer, D.W. ; Machuga, D.W.
Author_Institution :
Dept. of Electr. Eng., Pennsylvania State Univ., University Park, PA, USA
Abstract :
The scan volume of a thinned periodic linear phased array is proportional to the spacing between array elements. As the spacing between elements increases beyond a half wavelength, the scan range of the array will be significantly reduced due to the appearance of grating lobes. This paper investigates a method of creating thinned aperiodic, linear phased arrays through genetic algorithms that suppress the grating lobes with increased steering angles. In addition the genetic algorithm places restrictions on the driving point impedance of each element so that they are well behaved during scanning.
Keywords :
antenna phased arrays; antenna radiation patterns; electric impedance; genetic algorithms; linear antenna arrays; scanning antennas; array elements spacing; driving point impedance; genetic algorithms; input impedance bounds; periodic linear phased array; reduced grating lobes; steering angles; thinned aperiodic linear phased array optimization; Apertures; Equations; Genetic algorithms; Geometry; Gratings; Impedance; Phased arrays; Sensor arrays; Sensor systems; Solids;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2001. IEEE
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-7070-8
DOI :
10.1109/APS.2001.960189
