Research On Pattern Reconfigurable Antenna Based On Metasurface

With the development and progress of science and technology,we have entered the era of data informatization,people’s lives are more and more dependent on wireless communication technology,and people’s requirements for wireless communication are becoming more and more.my country has been able to compete with powerful countries for5 G technology patent rights from a step-by-step backwardness in the past.With the rapid development of 5G technology,various magical network and communication applications have become a reality.Nowadays,communication systems are required to have high speed and low delay at the same time,and people have higher requirements for the transmission quality of information.(1)The establishment of the discrete dipole model is mainly studied,and the correctness of the establishment of the discrete dipole model is verified by comparing the simulation results with the calculation results.Firstly,the development process of discrete dipole model is introduced,and then the discrete dipole model is studied,and the discrete dipole models of rectangular waveguide and cavity are respectively studied.Explain the extraction method of magnetic polarizability,including the mode coupling theory of rectangular waveguide and the surface equivalent law and the extraction method of magnetic polarizability of cavity.Then,the discrete dipole model of the rectangular waveguide is verified.By designing a unit and extracting its magnetic polarizability,by adjusting the unit structure parameters and capacitance value,the unit structure size and the capacitance value of the added varactor diode are obtained.and the resonant frequency.Finally,the discrete dipole is simulated and verified.Through comparison,it is found that the simulation curve fits the calculation results,and the simulation results can be obtained by calculation.(2)The pattern reconfigurable microstrip antenna designed in this paper is proposed,and the basic components of the antenna and the related parameters of the antenna are given.The reconfigurable principle of the pattern reconfigurable microstrip antenna is analyzed,and the antenna structure is designed according to the reconfigurable principle,and a pattern reconfigurable microstrip antenna with a center frequency of 2GHz is produced.The antenna consists of a microstrip antenna fed by a coaxial line at the bottom of the entire antenna,providing a pattern reconfigurable antenna without beam deflection.On the top of the microstrip antenna are a dielectric substrate,a DC bias circuit and a reconfigurable parasitic layer,and the input voltage of the DC bias circuit is controlled by a combination arrangement to change the on-off condition of the PIN diode on the reconfigurable parasitic layer,and then The connection and disconnection between the metal sheet units on the reconfigurable parasitic layer are made.Allows the antenna to generate five different radiation patterns.Finally,the simulation results of the antenna pattern are given to check whether the antenna pattern can be deflected.Then,the antenna is processed into a real object,and tested in a microwave anechoic chamber.The test results of the pattern are compared with the simulation results.The tested pattern is not much different from the simulated pattern,and there is a certain error within a reasonable range.The basic implementation requirement is that the antenna has the characteristic of discrete switching of the pattern.