A compact E-shaped microstrip patch antenna, which is significantly smaller than previous E-shaped patch antennas, is presented. The reduction in area is achieved by introducing corrugations into the two side wings of the E-shaped patch. The new technique is demonstrated by designing a 5-6 GHz corrugated E-shaped patch antenna that is 25% smaller than a conventional design. Despite the small size, the bandwidth of the corrugated antenna is as broad as the conventional antenna.
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