Abstract
AbstractA broadband antenna array for 28 GHz 5G communications is presented in this paper. The antenna array has dimensions of 45 × 20 mm2 and has a measured operating band in 25.052‐34.923 GHz frequency range. A 4‐way feed network to excite its array elements was designed and optimized for the operating band. The single element consists of two co‐centric wire hexagons backed by another hexagonal ground loop of larger radius. The resulting monopole is surrounded by vias arranged in an inverted U‐shape manner for better performance. The antenna array has a minimum radiation efficiency of 85% with peak gain of 12.15 dBi. The antenna has narrow beam‐widths of 44.3° and 12.5° in two of its respective planes. The antenna is fabricated on an ultra‐thin Rogers substrate. The proposed antenna is deemed suitable for future 5G communication systems due to its simple design, compact size and low fabrication cost.
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