GA BASED SYNTHESIS OF SATELLITE-BORNE MULTI-BEAM PLANAR ARRAY WITH ARBITRARY GEOMETRY

I. Introduction In the interests of efficiency, the shape of a footprint pattern radiated by a satellite-borne array antenna should conform precisely to the shape of the region on Earth for which coverage is required. Alternatively, in order to achieve “isoflux” illumi-nation1] on the earth surface through multi-beams, the size and the shape of the footprint should be precisely controlled. Previous works on the synthesis of arrays in-clude Chebyshev method, modified Woodward- Lawson metho…

GA based synthesis of satellite-borne multi-beam planar array with arbitrary geometry

A planar array antenna with arbitrary geometry synthesis technique based on genetic algorithm is discussed. This approach avoids coding/decoding and directly works with complex numbers to simplify computing program and to speed up computation. This approach uses two crossover operators that can overcome premature convergence and the dependence of convergence on initial population. Simulation results show that this method is capable of synthesizing complex pattern shapes of planar arrays with arbitrary geometry and can realize good sidelobe suppression at the same time.