Optimization of Radiation Patterns of Array Antennas

摘要

The array antennas exhibit flexibility in the design of radiation patterns. Conventionally, they are designed by controlling amplitude levels, phase levels space distribution of elements. In practice, for pre designed radiating elements in the array, one of the above parameters is considered for the design keeping the others fixed. However, in the present work the method of thinning is used to reduce side lobes without disturbing null to null beam width. When the elements of the array are uniformly excited, the first sidelobe level is found to be - 13.5 dB. It is of interest here to reduce them considerably from the conventional level. The methodology involves the application of genetic algorithm to blind the required radiating elements in such a way the resultant pattern is optimized.