Abstract
A low sidelobe level microstrip linear array is presented by employing a novel synthesis technique of pattern interferometry. The concept of adding one element each at both the ends of a linear array provide the required sidelobe level. A computer code is generated to calculate suitable excitations for the edge elements which are to be added to the conventional microstrip linear array. The nulls are observed at required angles and beam steering is achieved from −30 to 30 degrees. A microstrip linear antenna array has been designed for L band with two edge elements and for a gain of 14.56 dB. By varying the amplitude and phase excitation values of the two edge elements, reduction in sidelobe levels of 12dB and 5 dB were observed for sum and difference patterns respectively.
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