The Left-hand Material Affects The Study Of The Electromagnetic Field Distribution In The Cavity

In the process of depositing diamond film with MPCVD device,the quality of the deposited diamond film is poor and the efficiency is low due to the technical limitation,and the core of the problem lies in the resonant cavity of the MPCVD device.The traditional method is by adjusting the cavity size to improve the distribution of electromagnetic field in resonant cavity and improve the quality parameters of resonant cavity(resonance frequency and quality factor),or through the introduction of higher order mode to improve the resonant cavity electromagnetic field intensity and quality parameters.However,in the actual design process of resonant cavity,the size of the resonant cavity can not decrease infinitely,and the loss caused by the filling medium and introduction of higher mode leads to the optimization of electromagnetic field distribution within the cavity is restricted,and result in the quality parameters of the resonant cavity is also more difficult to improve.Therefore,in this paper,according to the special natures of the "left-handed materials"(LHM),and the method of theoretical calculation has been used in order to calculate the electromagnetic field distribution inside the cavity.,and the results have been simulated by the software of the High Frequency Structure Simulator(HFSS).In addition,the influence of the left-handed material with different properties on the resonant frequency and the quality factor of the resonant cavity is also studied.Compared with filling traditional materials,the filling of LHM can improve the distribution of the electromagnetic field inside the cavity.LHM can concentrate on the electromagnetic field in central part of cavity,and it also can increase the strength of the electromagnetic field in central part of cavity.In addition,filling the left-handed material with different properties also has a special influence on the resonant frequency and quality factor of the resonant cavity,so it is used to find the best left handed material as the filling medium to improve the quality parameters of the resonator.This method overcomes the limitation of the traditional material to optimize the electromagnetic field distribution in the resonator,and it is also can provide a theoretical guidance for the design of new cavity.