Full-band High-stability Phase Center Antenna And Its RF Circuit

Full-band high-stability phase center antenna for navigation system and its RF circuit have certain status and role in military applications.This paper focuses on the design of the full-band high-stability phase center antenna and its RF circuit,which mainly includes the following contents:1)Explain in detail the theoretical basis of high-stability phase-center antennas,including the basic principles and parameters of antennas,the concept of antenna phase center and the method of determining phase center,the concept of normal spiral antenna and axial helical antenna,and Aki The basic principle of the Mead spiral antenna.2)A full-band high-stability phase-center antenna is designed.Firstly,the effect of loading the corrugated surface structure on the phase-polarization pattern of the linearly polarized dipole is studied from the loading mode to improve the phase stability of the antenna.The cavity-type circularly polarized Archimedes spiral antenna uses a dielectric plate of FR4,a dielectric constant of 4.4,and a thickness of 1.524 mm.By optimizing the simulation to load the Archimedes spiral antenna in the form of a three-dimensional choke loop,the operating characteristics of the GPS,BeiDou and GLONASS navigation systems are typically working.Then the simulation,processing,and physical testing of the high-stability phase center antenna,simulation results and physical processing test results show that the measured and simulated results have good consistency.3)The RF circuit of the full-band high-stability phase center antenna is designed,including low-noise amplifier,mixer,and IF amplifier.It has been physically processed and tested,and all the indicators can meet the requirements.The design of the full-band high-stability phase center antenna and the RF circuit has important engineering application value.