Design of Triple-Band Slotted Planar Antenna for WLAN/WiMAX and 5G Applications

This paper presents a new small, low-profile planar triple-band microstrip antenna for WLAN/WiMAX and 5G applications. Nowadays, various wireless services are being integrated into a single device, so these devices require multiband resonant antennas to maintain their compact and portable size. Therefore, the aim of current research was to combine WLAN WiMAX and 5G communication standards together into a single wireless device by designing an antenna that can stimulate triple-band operation. The proposed antenna consists of circular-shaped rectangular slotted radiator encircled by a rectangular ring and a defected ground plane. The designed antenna has a compact size of 20 × 32 mm² (0.16λ₀ × 0.256λ₀). The optimum dimensions were obtained using parametric studies of the key parameters of the antenna. The proposed antenna offers three different bands—I 2.3–2.70, II 3.2–3.92, and III 5.1–5.9 GHz, which clearly covers the entire WLAN (2.4/5.2/5.8 GHz), WiMAX (2.5/3.5/5.5), and 5G bands. Finally, a proposed antenna was built and studied experimentally to verify the design concept as well as validate the simulation results. The good agreement of the simulation results with the measured results proved that the antenna can simultaneously operate on WLAN (2.4/5.2/5.8 GHz), WiMAX (2.5/3.5/5.5 GHz), and 5G frequency bands. This antenna is a suitable candidate for a device that can be used for these three services simultaneously.