Abstract

As the enhanced mobile broadband technology is commercially deployed in a growing number of regions, there is a gap between 5G millimeter wave frequency bands and high efficiency and high gain antennas. This paper presents a design of a microstrip patch antenna array with RT Rogers 5880 substrate that operates in the n257 channel, which has an operating frequency of 28 GHz, and has a bandwidth of 400 MHz. The parameters of the single elements are derived from the result of theoretical calculations. The performance of the single element is simulated by CST and evaluated to instruct the refinement of the parameters. After the design of the single element of the microstrip patch antenna, the design of the microstrip patch antenna array is proposed. It is also refined according to the evaluation of simulation results. The finalized patch antenna array design fed by a 50 ohms system has a realized gain of 13 dBi and 3dBi angular width of 15.8 with a working efficiency of 88% while operating at 28GHz with a bandwidth of 500 MHz. Moreover, compared to single patch antenna, the patch antenna array features in high spectrum effectiveness, high community, and can be applied to multi-beam antenna system. It also small and reasonable in cost. It has high potential to replace the single patch antenna in the area of mobile communications, satellite communications and global positioning systems and complement with 5G technology.

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