title: Multiband Three-Layer GNSS Microstrip Antenna
abstract: There are various receiving antennas of satellite radio navigation systems. As a rule, the qualitative polarization characteristics (axial ratio) are achieved by efficiency degradation or frequency ranges decreasing. In this article, a circular polarization GNSS antenna, which have no disadvantages described above are presented. By using a new planar feeding network and a three layer design of patch elements, it is possible to provide a symmetrical radiation pattern with high axial ratio and eff