Design and Numerical Analysis of a Multiband Antenna for 5G Wireless Communication

A sophisticated rectangular patch antenna has been conscientiously designed for a variety of wireless applications. This proposed antenna achieves a multi-band resonant frequency response, seamlessly covering 6.97 GHz, 9.58 GHz, 14.31 GHz, 16.29 GHz, 17.57 GHz, 19.86 GHz, and 21.6 GHz. The simulation design is crafted using CST software and a high-frequency Rogers RO 4350B substrate with a slender thickness is utilized to construct a compact patch volume of $0.604 \lambda_{0} \times 0.256 \lambda_{0} \times 0.035 \lambda_{0} \mathrm{~mm}^{3}$, where $\lambda_{0}$ is a free space wavelength at 6.97 GHz. This patch employed two slotted insets along with L shape slot in the ground to provide better return loss < −10 dB for all the resonant frequencies. It also provides nearly a perfect VSWR of less than 2 to the respective bands. The resonant frequencies nestle comfortably within the C, X, Ku, and K bands, opening doors to a wide array of 5G wireless applications, particularly in WiMAX, radar and satellite communications, scientific endeavors, and industrial communication networks.