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The preliminary design and particle simulation of high-frequency structure for 310GHz extended interaction klystron (EIK) with folded waveguide (FWG) as the resonant cavity was presented in this paper The validity of FWG slow-wave structure (SWS) as EIK resonant cavity was demonstrated. The simulation indicated that FWG cavities have high characteristic impedance and can generate high gain amplification...
The design of 220GHz folded waveguide (FWG) backward-wave oscillator (BWO) is presented in this paper. A prototype tube has been fabricated successfully though technical study and the backward oscillation has been observed in the hot test. The signal of peak power 36mW, frequency 229GHz is achieved with beam voltage 17.5kV, collected current 12.2mA, transmission rate 77% and working duty 1/20.
The design of electron-optical system for 0.14THz folded-waveguide traveling-wave tube was introduced in this paper. A prototype flow-through tube was welded to test beam transmission rate. The test result indicated that beam transmission rate reached 97% with electron gun voltage 14kV, current 24mA and beam channel diameter 0.26mm. The study certificated the design reliability of electron-optical...
The latest development of 220 GHz folded waveguide (FW) backward wave oscillator (BWO) is presented here. The pill-box window system, beam optical system (BOS), slow wave structure (SWS) have been designed, machined and tested. However, the collector current of the prototype tube can just reach 13 mA with the emission current of 22 mA due to the imperfection of the structure and magnetic field, where...
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