Abstract: An efficient method is shown for radiation pattern of large plane arrays.Active element patterns of a large plane array are constructed from those of a small linear array.Field radiated by a large plane array is obtained by summing up active element pattern of all elements.With this method a large plane array analysis problem is converted into a small linear array problem,and thereby computational cost is considerably reduced.In addition,a hybrid method using extrapolative method combining with genetic algorithm is proposed for synthesizing desired patterns of large plane arrays.To assess accuracy and efficiency of the hybrid method,a low side lobe 10×10 plane microstrip patch antenna array is synthesized with the method.Calculated results agree well with that by HFSS.

Key words: plane arrays, subarray, radiation, genetic algorithm, sidelobe suppression