Compact Multi-band Antenna for Global Navigation Satellite Systems

摘要

A compact multi-band antenna suitable for Global Navigation Satellite Systems (GNSS) will be presented. The antenna is useful for GNSS receivers onboard small satellites, aircrafts and ground terminal. The antenna operates at two frequency bands which are LI (1.575 GHz) and L2 band (1.227GHz). It achieved good circular polarization performance within a broad 3-dB beamwidth, which will enable the small satellite to receive signals from several GNSS satellites. Both the antenna and its feed network are designed. The antenna (without the feed network) has very small size of 1 cm x 1 cm x 1 cm only, and is very light weight. The feed network for the antenna is also designed. To prove the concept, a prototype is developed. The measured results are presented and discussed.