Small-signal theory analysis and desigen of dielectric-loade gyro-TWT

The small-signal theory of the gyro-TWT, a pinch-point analysis based on the theory of Briggs and bers combining the cold analysis of the dielectric-loaded waveguide are employed to analysis the threshold current of the operating mode and critical oscillation .The analysis concludes the improvement of the dielectric loss, through altering the load condition, can enhance the threshold current and critical oscillation lengths. The cold analysis of the dielectric-loaded waveguide and a smooth waveguide dispersion relation is used to analyse the small signal gain of the dielectric-loaded gyro-TWT. The analysis gives the gain-frequency response of a dielectric-loaded gyro-TWT taking the thickness of the dielectric-loaded as the parameters. Through the analysis of the self-oscillations and the small signal gain, the optimum operating parameters of a dielectric-load gyro-TWT can get to support the nonlinear analysis.