An Irregular Two-Sizes Square Tiling Method for the Design of Isophoric Phased Arrays

TL;DR

This paper introduces a novel method for designing isophoric phased arrays using irregular tiling of two-sized square tiles, optimizing their placement for desired power pattern features through genetic algorithms.

Contribution

It presents a new irregular tiling approach with theoretical tileability conditions and an efficient optimization strategy for phased array design.

Findings

Effective tile arrangements for array coverage

Optimized power pattern performance

Validated approach with benchmark examples

Abstract

The design of isophoric phased arrays composed of two-sized square-shaped tiles that fully cover rectangular apertures is dealt with. The number and the positions of the tiles within the array aperture are optimized to fit desired specifications on the power pattern features. Toward this end, starting from the derivation of theoretical conditions for the complete tileability of the aperture, an ad hoc coding of the admissible arrangements, which implies a drastic reduction of the cardinality of the solution space, and their compact representation with a graph are exploited to profitably apply an effective optimizer based on an integer-coded genetic algorithm. A set of representative numerical examples, concerned with state-of-the-art benchmark problems, is reported and discussed to give some insights on the effectiveness of both the proposed tiled architectures and the synthesis strategy.