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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 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...
The design of double anodes magnetron injection gun (MIG) for 3 mm gyrotron is described in the paper. Based on the beam-wave interaction parameters in the gyrotron cavity, some structure parameters of the MIG are primarily designed by theory calculation. The simulation calculation using PIC code is done to verify the structure design of the MIG and to obtain some physical parameters of the electron...
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