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: PDFPersonal VDE Members are entitled to a 10% discount on this title
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.