A High Data-Rate Kiosk Application circularly polarized fractal antenna for mm-wave band radio with 0.18µm CMOS technology

A mm-wave circularly polarized (CP) fractal antenna has been designed and simulated using standard 0.18 urn CMOS with six metal-layer structure. The proposed design consists of a wideband circularly polarized multi-segment circular fractal antenna with circular polarization at the top layer M6. The proposed CFA has a small size of 25×25× 1mm
³
and operates over the frequency band between 49.8- and 64.5-GHz with VSWR <; 2. The multi segment circular fractal structure is employed for antenna design because the circular segments can excites two orthogonal E vectors current to achieve circular polarized radiation. The proposed CMOS antenna can offer a simulated peak gain of -1.71 dBi and a simulated axial ratio bandwidth to cover over operating band from 50 to 64.5 GHz.