Research On Theoretical And Experimental Of 140GHz Extended Interaction Oscillator

Terahertz(THz)wave is electromagnetic wave with frequencies in the range of0.1?10 THz(wavelength 3000?30 ?m).The terahertz band covers the characteristic spectrum of many substances which can be used to study some basic scientific problems.Terahertz wave is an electromagnetic wave frequency band with unique advantages and strategic significance that has not been widely used and has great potential application value.It will provide strong support for scientific and technological progress,economic construction,social and national security.Vacuum electronic devices are the source devices of electromagnetic waves,which generate electromagnetic waves stably and efficiently.The Extended Interaction Oscillator(EIO),which has received special attention internationally,is a terahertz radiation source that can obtain high-power and high-frequency electromagnetic waves.There are multiple atmospheric microwave windows in the terahertz bandwidth such as140 GHz,220GHz,etc.It has a small propagation loss in the atmosphere,so it can play an important role in a relatively harsh environment.In this paper,theoretical and simulation researches on the 140 GHz long and short hole extended interaction oscillator have been carried out,and it is proved that the long and short hole slow-wave structure is superior to the traditional rectangular extended interaction device.The specific work is as follows.1.Through electromagnetic theories such as EIO dispersion and wave beam interaction,the advantages of long and short holes EIO have been demonstrated,and its advantages have been described.This paper uses CST software to perform cold cavity analysis on high-frequency structures,and compares the results of frequency,electric field,dispersion,quality factor,coupling impedance and S-parameters to obtain structural parameters.2.After the cold cavity analysis,the MAGIC software is used to perform particle simulation calculations on the high-frequency structure to obtain the electron injection voltage,electric field strength,output power and output window position.Through the analysis of the cold cavity and particle simulation simulation,this paper achieves an output power of 203 W for 140 GHz electromagnetic waves.there are obvious advantages over the traditional extended interaction devices.Paper implements 140 GHz wave output power 203 W.