A MATLAB-Based Filter-Design Program: From Lumped Elements to Microstrip Lines

This tutorial reviews systematic filter-design steps, from lumped (LC) elements to transmission lines and microstrip lines. The design procedure is automated using a user-friendly MATLAB tool. Classical Butterworth filter-design steps are taken into account. The tool only needs initial filter specifications. Filters are then designed automatically, and corresponding lumped and distributed filter schematics are plotted, together with filter characteristics (l.e., their frequency responses).