Wang Efeng

Preliminary experiment research on the W-band gyrotron traveling wave tube

In the experimental study a periodic dielectric loaded structure is used as the high-frequency structure of the W-band Gyro-TWT. The experimental measurement is carried out when the accelerating voltage is 63kV and the electron beam current is 6A. A peak output power of 120 kW, 3dB bandwidth of 6 GHz are obtained.

Analysis of RF Field in Open Cavity by Mode-Matching Technique

Open cavity with abrupt changes is generally used in the gyro-oscillators and amplifiers. On the basis of mode-matching technique we present the high frequencies structure analyses code for gyrotron. The code provides a method for computing the resonant frequency and Q value in an open cavity. We present the theory and an example which demonstrates the operation and the possible usage of the code.

Simulation of the W-band gyroklystron with open spherical resonators

In this paper, the interaction section consisted of the open spherical resonator is designed, and a W-band gyroklystron with the open spherical resonators has been simulated with the MAGIC simulation software. The results of simulations show that the gyroklystron with the spherical resonators operates stably in the operating mode TE102 and no competing modes caused. The output power of about 50 kW has been achieved at the frequency 94 GHz under operating voltage of 60kV, and beam current of 5A. The spherical resonant cavity is characteristic of higher density of electric field energy and can provide a stronger electric field strength with which the electron interacts. This will be good for enhancing the output power of the gyroklystron.

Analysis of the Characteristics of Gyro-TWT with Helical Corrugation

The rule of mode coupling and mode competition in helical wave-guide are analyzed according to the coupling wave equations of it. The selection of operating point is discussed. These provide basis for the calculation of beam-wave interaction.

Study of the Field Characteristics in Helical Wave-guide

The mode coupling rules, dispersion characteristics and field distribution of wave-guide with introduction helical corrugation are analyzed using traveling wave theory. According to the simulation results characteristics of operating mode are illuminated.

Characteristic Study of Traveling Wave Tube with Slow Synchronous Wave

Structure of the traveling wave tube with slow wave system and its dispersion characteristics are analyzed. The influence of slow wave system geometrical sizes on its working capability is discussed.