Miniaturized Microstrip Slot Antenna Array For Navigation System

In order to realize the miniaturization of the antenna used in the navigation system, the slot array is slotted in the microstrip antenna substrate, and the coupling cavity is loaded at both ends of the slot to optimize the radiation characteristics of the slot array; The compact PBG structure is loaded at the three corners of the ground plate to reduce the surface radiation, so as to realize the miniaturization and circular polarization of the microstrip antenna. The antenna adopts an equilateral triangle structure, the side length is only 18.7% of the wavelength (the wavelength is the wavelength corresponding to the central working frequency of the antenna), and the working frequency band is 1.57Ghz ~ 1.58Ghz. The experimental results show that the antenna covers the working frequency band of GPS navigation system and Beidou navigation system.