A type of lumped-element-based analog filters based on transversal circuit networks

A novel technique to design lumped-element-based analog filters is presented. It exploits the application of signal-interference principles to a class of transversal filtering section made up of two in-parallel discrete-element transmission lines. This circuit network, through destructive and constructive signal-energy interactions, enables high-selectivity filtering actions to be generated. Moreover, this can be done in the same circuit topology independently of the type of transfer function to be synthesized. Design equations and guidelines for this lumped-element analog filter approach are given. Besides, for experimental validation, simulation results of two synthesis examples consisting of a lowpass and a bandpass filter implemented at the layout level are shown.