Circularly Polarized Patch Antenna with Rotated S Shape Slot For 5 G Application

This paper presents a mid-band circularly polarized slot antenna for fifth-generation applications. An Sshaped slot is etched into a rectangular patch of the microstrip antenna is applied to realize circular polarization radiation. Rotating the S-shaped slot improves the antenna's axial ratio bandwidth and gain at 3.5 GHz. Probes feeding a perturbed rectangular patch could excite right-hand circular polarization and left-hand circular polarization. Moreover, the probe feed position is optimized to widen the impedance bandwidth of the proposed antenna. The multi-band can be applied in many wireless applications.