Patch slot antenna with circular polarization for the high-accuracy positioning using GNSS signals

A new method to improve technical characteristics of the patch slot leaky-wave antennas with the circular polarization has been described. It has been shown that the use of additional slots with electrical length shorter than the electrical length of the main slots of the radiator, the former being implemented as concentric arcs around the phase center of the antenna, allows improving the frequency, phase and angular characteristics of the antennas. In particular, the ellipticity decreases and the cross-polarization increases, improving the given antenna resistance to multipath interference which is one of the main sources of the high-accuracy positioning errors. Based on this method multi-band patch slot leaky-wave antennas with the right-hand circular polarization for the high-accuracy positioning using the signals of the Global navigation satellite systems, including GLONASS, GPS and GALILEO, have been designed.