Analytical Models for the Time Response of a Modal Filter Having a Symmetrical Pair of Passive Conductors with Grounded Ends

The paper briefly presents the results of the development of analytical models for the time response at the ends of a modal filter based on a microstrip line with a pair of passive conductors on top. The models are based on the application of modal analysis to the structure under study and take into account the boundary conditions at the ends. Validation of the models is carried out using numerical modeling. As a result, a complete coincidence of the time responses at the ends of the active conductor of the modal filter was obtained. A brief description of the processes of mode propagation in modal filter is also given. The application of the developed models at the early stages of the design of strip protection devices can reduce the time and computational resources when they are optimized by evolutionary methods, since there is no need to calculate the response as such when calculating in a range of parameters.