Wideband Fabry-Pérot resonator for 28 GHz applications

In this paper, a compact design of Fabry-Pérot (FP) resonator for 28 GHz applications is proposed. The antenna is composed of a coaxial-fed source radiator (patch antenna), an air cavity, and a partially reflecting surface (PRS) with 4×4 array of cells. The antenna has a good radiation behavior in the desired operation band of 26-30 GHz with 6 dBi directivity improvement. The antenna is designed on low-cost FR-4 dielectrics (h=0.8 mm, ε=4.3, and δ=0.025). The designed FP resonator exhibits wide bandwidth around 28 GHz which is one the candidate bands for the future fifth generation (5G) wireless systems. It exhibits a high-gain directive-beam pattern in the broadside direction with 12 dBi directivity at 28 GHz. The antenna has a compact size of 25×25 mm2.

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