A novel method for measuring the complex permittivity of dielectric plates is proposed by using TM0mn modes in a closed cylindrical resonant cavity.

A6 relativistic magnetron resonant system is calculated and simulated by equivalent circuit and high frequency structure simulator (HFSS of agilent), and the effect of end cap to resonant frequency is especially presented in this paper.

In the paper,on the basis of studing and mastering the composition and basic principles of the power ultrasound resonant system,using honing processing and resonance theory,a CAE system of power ultrasonic resonant system is developed.

An artificial neural network(ANN) based algorithm was proposed to substitute for the traditional calculations used in open resonant cavity method for microwave ceramics measurement, in order to simplify calculations and increase the calculation speed.