A computational breadboard model for TD-FD analysis of guiding structures

A TD-FD (time-domain finite-difference) computational breadboard model (of a homogeneous rectangular waveguide) is proposed as a preliminary checking step for convergence before a huge TD-FD simulation effort is applied to a specific guiding structure. The breadboard model is proposed for TD-FD applications to shielded guiding structures. The properties of phase linearity and nondissipativity of the leapfrog scheme can be verified in the breadboard model. The two properties provide not only convergence criteria for the finite differenced approximation, but also permit the selection of the optimum input pulse shape for wideband TD-FD application to guiding structures. Once convergence is confirmed, the other error sources can be evaluated.<>