Design of 3-pole PCS-type monoblock filter using an equivalent circuit approach

Computer-aided synthesis techniques of ceramic monoblock filters are presented in this work. These techniques make use of an accurate equivalent circuit as the basic design and tuning tool. This circuit is extracted from first electromagnetic principles and is subsequently modified and optimised in order to meet the desired filter specifications. From the change in the equivalent circuit parameter values, useful information can be derived for the necessary structural changes. This, combined with a structural optimiser, provides a very useful approach for the design of monoblock filters.