A Compact High-Gain 28 GHz Antenna Array for Beyond 5G Wireless Networks

In this paper a novel, high-gain corporate-fed 16-element circular patch array featuring a coplanar waveguide (CPW) feed and parasitic loop is proposed for beyond 5G and future 6G applications. An ultra-thin Rogers RO4003C substrate of 0.02 mm thickness is used, and the overall size of the antenna is 31.09 × 41.45 mm. The proposed antenna operates at 28 GHz and achieves a bandwidth of 220 MHz between 27.84 GHz and 28.12 GHz, with a maximum realized gain of 16.85 dBi at 28.05 GHz. The antenna prototype was fabricated using an HPC Laser Cutter (LSE110 Fibre Engraver model). The proposed antenna array is well-fitted for high-gain line-of-sight communication links at the 28GHz band.