Matching network design using genetic algorithms for impedance constrained thinned arrays

This paper investigates a technique for optimizing matching networks for thinned aperiodic dipole arrays to achieve a 2:1 or better VSWR for each antenna element over the entire scan range of the array. The thinned array is optimized via a genetic algorithm to have a suppressed grating lobe over the scan range of the array. In addition, the genetic algorithm places restrictions on the driving point impedance of each element so that they are well behaved during scanning. The impedance constraint allows a three element reactive matching network to be optimized for each element of the array using a separate genetic algorithm.