A Multiband Circularly Polarized Antenna for Satellite Navigation System

This letter presents a multiband circularly polarized antenna for the satellite navigation system. The main features of this antenna are the following: four layers of stacked patches to achieve multiband operation and compactness; one metal structure; and one radome. The radome can ensure aerodynamic shape and the antenna is fixed on the aircraft through the metal worktop. Simulation results show that the proposed antenna exhibits excellent performance. Details of design considerations and simulation results are presented.