Design of Low-Noise Electron Gun for Traveling Wave Tube Transmitter/Receiver

In this paper, we present a low-noise electron gun design for a new type device, traveling wave tube (TWT) transmitter/receiver. The low-noise electron gun is a key part of the TWT Transmitter/Receiver, which can provide a low-noise electron beam for amplifying the received RF signal. The simulation design of the low-noise electron gun, noise performance analysis, and experimental testing have been carried out in this paper. In the experimental test, when the TWT transceiver is operating in receiving mode and the beam current is 4.5 mA with 4992 V, the noise factor of the TWT transceiver is about 18 dB.