Modeling of a quadrupole antenna element backed by high-impedance screen for circularly-polarized antennas with high-precision positioning systems

The paper explores the existing principles of building antenna assemblies of global navigation satellite systems, provides calculations, modeling and analyzes the possibility of using a high-impedance screen in a quadrupole antenna element. The modeling was carried out using a software product for electrodynamic 3D modeling – Ansys HFSS with a set of numerical methods for calculations in time and frequency domains. The object of the study is a circularly-polarized antenna. The subject of the study includes the methods of obtaining the electrodynamic characteristics of antennas necessary for high-precision positioning in non-inquiry measuring systems. The purpose of the study is to analyze the parameters of multi-frequency and wide-band circularly-polarized antenna elements with multi-point excitation and their power supply schemes. Besides, the study proposes to build a highly efficient power supply system for a circularly-polarized antenna.