Wideband High-Gain Franklin Antenna Array for 5G Millimeter-Wave Applications

In this paper, a novel six-element 3 \(\,\times \,\) 2 Franklin array antenna is proposed for 5G millimeter-wave applications. Coaxial feed was used to excite the six elements. The parameters of the Franklin array elements are fine-tuned to achieve a high-gain antenna performance as desired. The suggested antenna employs Rogers RT Duroid substrate, which enables a broad frequency range from 25.61 to 34.62 GHz, covering a 5G millimeter-wave frequency band n257/n258/n261. The antenna dimensions are 19 mm \(^3\) \(\times \) 19 mm \(^3\) \(\times \) 1.6 mm \(^3\) . The proposed antenna has 29.91% fractional bandwidth along with a peak gain of 10.64 dBi at 28 GHz frequency and it is well-suited for wideband and high-gain mm-wave applications in the context of 5G FR-2.