Efficient optimization of the phase diagram in digitally-controlled reflective cells

An efficient hybrid method to optimize the phase states distribution, or phase diagram, of a digitally-reconfigurable reflective cell is presented. It allows minimizing phase quantization errors in applications such as reflect arrays. Digital control of the reflected wave phase is achieved by placing a given number of control elements within the reflecting cell (e.g. PIN diodes or MEMS). The method is based on a perturbation of the control elements positions and combines a genetic algorithm and a least squares optimization. It solely requires running a very small number of full-wave simulations prior to the optimization process. The method is illustrated by the optimization of a reflective cell based on PIN diodes technology, but could equally be applied to a MEMS-based digital implementation.

Published in:
Proceedings of the 3rd European Conference on Antennas and Propagation, 1230-1233
Presented at:
3rd European Conference on Antennas and Propagation, Berlin, GERMANY, March 23-27, 2009

 Record created 2011-09-26, last modified 2019-12-05

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