Efficient Optimization of the Phase Diagram in Digitally-Controlled Reflective Cells

Conference: EuCAP 2009 - 3rd European Conference on Antennas and Propagation
03/23/2009 - 03/27/2009 at Berlin, Germany

Proceedings: EuCAP 2009

Pages: 4Language: englishTyp: PDF

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Perruisseau-Carrier, Julien; Georgiadis, Apostolos (Centre Tecnologic de Telecomunicacions de Catalunya (CTTC), Barcelona, Spain)

An efficient hybrid method to optimize the phase states distribution, or phase diagram, of a digitallyreconfigurable reflective cell is presented. It allows minimizing phase quantization errors in applications such as reflectarrays. 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.