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

Abstract

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.

Synthesis of concentric ring antenna array for a wide isoflux pattern

“…It can be noted that the antenna elements are distributed symmetrically in both directions. As highlighted aspect, the design regards less antenna elements with fewer levels of excitations for a singular shape beam with respect to designs presented previously in the literature .…”

“…The design of a PCRA is very suitable to reduce the mass and weight of the whole antenna array. Moreover, the design regards levels of excitations which can reduce the hardware complexity unlike previous designs in the literature . This is an attractive solution for this specific problem where the volume occupation of whole antenna array hardware is critical in satellites.…”

“…For the problem of design an antenna for LEO satellites, the authors from proposed an antenna of anisotropic meta‐surface for a wide coverage pattern at the X‐band. Otherwise, it has been only proposed interesting designs of multi‐beam radiation that provide singular spots for covering a wide spatial range . So far, it has not been studied the synthesis of CRAs for a wide coverage pattern with a few antenna elements excited by different level of excitations.…”