Abstract: This article presents an overview of the microstrip patch antenna and its design techniques. Basically a microstrip patch antenna comprises of a trace of copper or any other metal of any geometry on one side of a standard printed circuit board substrate with other side grounded. The antenna is fed using various feeding techniques like coaxial, strip line, aperture coupling or proximity coupling techniques. The working principle and the radiation mechanism have also been described. The microstrip patch antenna is widely used military, industrial and commercial sectors.
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