Study Of The High Efficiency Beam-Wave Interaction Technology Of Sheet Beam Extended Interaction Oscillator

Millimeter wave is located between microwave and submillimeter wave in electromagnetic wave spectrum,whose wavelength is in the range of 1 cm~1 mm an;d the frequency is between 30 GHz to 300 GHz.Millimeter wave technology is diffusely used in electronic countermeasure(ECM)technique,radar,detection and other fields.In the field of national defense and military affairs,the requirements for high-power,high-frequency and miniaturization of airborne and spa ce-borne equipment are sigficient high,and millimeter-wave vacuum electronic devices play an irreplaceable role in these aspects.The sheet beam extended interaction oscillator(SBEIO)has the characteristics of high power,miniaturization and high efficiency.With the increasing requirement of power and efficiency in the military field,the efficiency and power of the sheet beam extended interaction devices(SBEID)should be improved.The main physical process that determines the power and efficiency of the SBEID is the beam-wave interaction of the cavity.Therefore,it is of great significance to study the technique of the beam-wave interaction with high efficiency.This paper mainly studies the high efficiency technique of the beam-wave interaction process of the SBEIO,proposes a new global optimization scheme,and designs a high-efficiency Ka-band SBEIO.The main contents are as follows:The beam-wave interaction process of SBEIO is analyzed based on the basic working principle of klystron,and a one-dimensional macro-electronic model is proposed to study the beam-wave interaction process.A nonlinear numerical program is designed to simulate the beam-wave interaction process of the SBEIO.The parameters such as efficiency,power have been obtained,and the electronic phase space diagram and output power curve have been drawn.A new multi-parameter global optimization scheme based on intelligent algorithm is proposed.Through the analysis of several existing intelligent algorithm,the simulated annealing algorithm is selected as the optimization algorithm of this scheme.The optimization scheme proposed in this paper is used for optimization.After multiple simulation annealing algorithms were optimized,a longitudinal electric field capable of obtaining a high-efficiency beam-wave interaction process is obtained.Based on the distribution of the longitudinal electric field,a high-efficiency and high-frequency structural model was designed and the particle simulation was carried out.