Analysis of an Open Cavity with Abrupt Transition by Mode-Matching Technique

The paper applies the mode-matching technique to produce a abrupt transition matrix, called scattering matrix, which can be cascaded. A method for computing the resonant frequency in a complex cavity consisting of a series of waveguide sections is derived. By computer programming simulation, the cascaded scattering matrix is calculated in multi-mode cases and the characteristic parameters of a cavity, such as resonant frequency and Q-value, are obtained.