| Terahertz wave is a kind of electromagnetic radiation between far infrared and millimeter wave,its frequency range is from 0.1THz to 10 THz,and its wavelength is in the range of 308)?38)8),and it also has many superior properties,and it has extremely important research significance in many fields.The terahertz radiation source is one of the hindering factors for the rapid development of terahertz waves.Therefore,research on the development of terahertz radiation source-related technologies and new mechanisms has become a top priority for scientists,and mastering the key technologies for developing high-power terahertz radiation sources has become the key to the wide application of terahertz waves in military and civilian applications.The Sheet Beam Extended Interaction Klystron(SBEIK)is a terahertz-band radiation source device that combines the advantages of traveling wave tube and speed modulation tube,so it has the advantages of both devices.In addition,its compact structure,small size,light weight and high power make it excellent for terahertz applications.In this paper,we focus on the efficient injection-wave interaction of terahertz band band injection extended interaction devices,propose a novel optimization scheme,and design a high frequency structure model of SBEIK with high power in G-band.The main contents of the article are as follows.This article introduces the current status of the development of band injection extended interaction devices at home and abroad,and introduces the working principle of the tachyon tube.And according to the working principle of SBEIK combined with MATLAB platform,a nonlinear numerical calculation procedure based on space step is designed,which can significantly reduce the calculation time consuming and improve the calculation performance,and can quickly calculate the output power and efficiency of the extended interaction device.In this paper,we analyze the 220 GHz Sheet Beam Extended Interaction Oscillator(SBEIO).Including mode analysis,resonant cavity structure parameters,number of interaction gaps,etc.are investigated and verified by particle simulation.In this paper,we continue to explore the efficient injection-wave interaction of220 GHz SBEIK based on the research of 220 GHz SBEIO.A 220 GHz 8-gap 5-cavity SBEIK high-frequency structure containing 2 output cavities is proposed and verified by PIC simulations.An improved fast and efficient optimization scheme is proposed for the multi-parameter global optimization of the 220 GHz 8-gap 5-cavity SBEIK high-frequency structure,and the optimized parameters are used to build a new model and verified by PIC particle simulation. |
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