Resonant Cavity Antenna Design Based On Frequency Selective Surface

In the development of modern communication,the quality and performance of electronic equipments greatly affect the communication system,and the performance of the antenna affects the use of the communication system.Compared with common antennas,Fabry-Perot resonator antennas have the advantages of high gain,small size,light weight,convenient processing and simple feeding network.In this paper,the classical Fabry-Perot cavity antenna is designed based on the gain enhancement.The broadband gain cavity antenna and the low profile Fabry-Perot cavity antenna are designed,and the corresponding electromagnetic performance is studied and simulated.The research content of the thesis is as follows:1.This paper expounds the basic principle of the antenna,describes the basic theory of the traditional frequency selective surface,analyzes the basic theory of the classic Fabry-Perot resonator,and studies the principle of high gain of the Fabry-Perot resonator.2.A broadband high gain cladding microstrip antenna based on a frequency selective surface of a regular reflection phase is designed.A single-axis feed U-slot microstrip patch antenna is selected as the feed antenna inside the resonant cavity.A single-layer single-sided frequency selective surface unit and a single-layer double-sided frequency selective surface unit are designed as Fabry-Perot resonator antennas.The upper cladding layer analyzes the electromagnetic properties of the two frequency selective surfaces and simulates the amplitude and phase of the reflection coefficient.On this basis,the two types of frequency selective surfaces are combined with the feed antenna to analyze the bandwidth and gain effects of the corresponding cavity antenna.3.A low profile cladding high gain microstrip antenna is designed.Based on the single-layer single-sided frequency selective surface unit,the artificial magnetic conductor frequency selection surface is designed to improve the reflection phase of the frequency selective surface at around 0°,and a low profile Fabry with a section height of one quarter wavelength is designed.The Fabry-Perot resonator antenna achieves a reduction in antenna cladding height based on antenna gain improvement.In order to better reduce the height of the antenna cover,the dielectric substrate of the feed antenna is fed into the array of electromagnetic bandgap structures,and the reflection phase of the bottom plate of the antenna is converted to further reduce the profile height of the antenna.In summary,the main goal of this paper is to improve the gain bandwidth of the high-gain Fabry-Perot resonator antenna and to reduce the cladding height of the antenna as much as possible.The designed cladding antenna has higher gain,significantly widened bandwidth,low profile height and strong practicability.The final simulation verifies the broadband gain and the reduction of the profile of the Fabry-Perot cavity antenna.