A simple high gain ultra-wideband Microstrip patch antenna for extremely high frequency applications (EHF) is proposed in this paper. The antenna has simple shape and small size enable it to be inserted inside any medical gadget operating in EHF frequency band. The antenna overall dimensions are 57.3×4×1.6 mm. Simulation results show that the antenna has a bandwidth of 31.39 GHz which support a very high data rates and a maximum gain of 11.53dBi which represents such a high gain that the antenna can be considered to be with negligible losses.
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