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A 340GHz backward wave oscillator (BWO) based on the sine waveguide and pencil electron beam is presented as a novel terahertz radiation source. The particle-in-cell (PIC) simulation results predicts that this device can produce the output power of over 2.7W in the frequency range of 335.8–348.5GHz by utilizing a 20mA pencil beam and adjusting the voltage from 12kV to 14 kV.
This paper mainly introduces the study for 140 GHz folded waveguide (FWG) traveling wave tube (TWT) with big electron tunnel. Through the high frequency simulation software and 3-D particle in cell (PIC) simulation, we get the structural parameters. By using these parameters, we fabricate the whole vacuum electron device (VED), including the slow wave structure, magnetic focusing system, input and...
The electron beam interaction in a novel slow-wave structure called dielectric-lined azimuthally periodic circular waveguide (DLAP-CW) is studied in Ka-band frame, which is a modified form of a conventional dielectric-lined circular waveguide (DL-CW). And the DLAP-CW has large beam aperture, good dispersion characteristics and easy fabrication. In this paper, the capability of beam-wave interaction...
A novel slow wave structure with low work voltage, high work current, compact structure was proposed by using radial spiral waveguide. The dispersion and transmission character was analyzed by computer simulation, and its work voltage was obtained, which could be as low as several hundred Volts. As the emitter face of cylinder gun larger than ordinary TWT's, it is possible to produce a high current...
Sine waveguide is a novel electromagnetic structure. The experimental and theoretical investigation work done on sine waveguide for terahertz vacuum electron devices is reported in this paper. One experimental model is fabricated in W-band, and its transmission loss is measured. At the same time, several terahertz traveling wave tube amplifiers and backward wave oscillators are designed in particle-in-cell...
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