Abstract

This paper presents an experimental approach of X-band slotted microstrip patch antenna array which is fed by a non-uniform current distribution. The use of a non-uniform current distribution aims to suppress the sidelobe level (SLL) which usually appears in the array of antenna. The proposed antenna array which is intended to work at frequency of 9.3GHz for X-band application consists of 4 × 4 microstrip patch antenna on a grounded 0.508mm thick RT/Duroid® 5880 dielectric substrate. From the characterization, it shows that the use of non-uniform current distribution can suppress the SLL up to 18dB in which this is 5dB better than the patch antenna array fed by a uniform current distribution.

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