Circular Slot Radiator for UWB and 5G-I Band Microwave Applications

A Circular Slot Radiator for UWB and 5G-I Band Microwave Applications is the focus of this antenna design. he primary goal is to strike a delicate balance between complexity and size efficiency. On the front side of the antenna, you'll find a central slotted rectangular patch, which includes a circular slot and two rectangular slots positioned along the lower portion of the patch. The central feed mechanism is established using a 50-ohm strip line that connects to a microstrip line. Simultaneously, the rear side of the antenna incorporates a well-defined bottom plane to enhance its performance, especially at higher frequencies.To assess its performance comprehensively, the antenna undergoes simulation studies conducted using CST Microwave Studio. The substrate employed in these simulations is an FR-4 material with dimensions measuring 15x16x1.5 cubic millimeters, resulting in an electrical size of approximately 0.15λ0.16λ0.015λ. The simulation results are quite impressive, showcasing significant attributes such as an extensive impedance bandwidth spanning 127% and a return loss as low as -33 dB. These impressive characteristics cover a broad frequency range from 3.1 to 14 GHz, with a central frequency located at 8.5 GHz. Moreover, the radiation patterns of this antenna maintain consistency across the entire operational range, exhibiting stable polar patterns and delivering highly efficient performance. Notably, the antenna demonstrates a broad gain of 3.43 dBi and an efficiency rating of 79.5%.