Quad-Band Circular Polarized Antenna for Multi-navigation System

This paper proposes a novel quad-band circularly polarized antenna for Global Navigation Satellite System (GNSS), covering multiple standard frequency bands for GPS, Galileo and BeiDou systems. The antenna is probe fed with a stacked structure. We use three orthogonal feed network antennas with a 90 ° phase difference and a Corner-cut microstrip antenna to realize circular polarization in four frequency bands. The whole antenna shows good impedance matching and axial ratio characteristics, and also has the advantages of compact structure and low cost and can be applied in different satellite navigation systems.