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The paper puts forward a design thought of phase velocity tapering in the design of 140GHz folded waveguide traveling wave tubes. It can make electron with traveling wave field synchronization again in output segment of interaction circuit. By the phase velocity analysis and optimized design, the big signal simulation is calculated in operating voltage 14.05kV and current 25mA. The efficiency is improved...
This paper described the 3D simulation method and results of electron gun and beam transport for the 0.14THz TWT with the help of CST. The hot test results show that the design of the electron beam optics system satisfied the need of the TWT. It bases the manufacture of the 0.14THz travelling wave tube.
This paper introduces the design method of the electron optical system for a 0.22THz folded waveguide traveling wave tube. As the electron beam current is 10mA and the beam channel radius of the tube is only about 0.1mm, the PPM(period permanent magnet) focusing system needs to be carefully designed to transmit this beam current from the electron gun to the collector. A tree-electrode Pierce gun is...
A broadband 0.22THz folded waveguide traveling wave tube amplifier has been designed by analyzing its slow wave structure and simulating with PIC code. The folded waveguide traveling wave tube is proposed to be operating at 0.22THz, with a 3 dB bandwidth of more than 10GHz. The gain of this folded waveguide traveling wave tube is to be more than 13 dB, and the beam voltage is 14 kV. The first test...
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