Global navigation satellite system (GNSS) is developing rapidly. Modern GNSS technology is facing challenges for researchers to explore. One hot topic is the multi-system GNSS device. The motivation for the antenna designers is to miniaturize the size of the antenna and meanwhile keep its standard performance. It is a challenging task for an antenna array design to achieve a wide bandwidth, high gain, small size, good coverage, and simple fabrication technique all at the same time. This thesis develops several different novel compacts, high gain, and wide bandwidth circularly polarized (CP) antenna capable of providing wide coverage for GNSS frequency bands from 1.16 GHz to 1.6 GHz to cover the GPS L1-L5 bands, GLONASS G1, G2 and G3 as well as the Galileo E5a, E5b, E6, and E1bands.