The Scaled Shield Low-Pass Filter

The circuit model recently developed for a shield shows that a typical shield passing signals up to the order of 100 Hz could be scaled to pass frequencies up to 100 MHz. The theory whereby this could be done for transformers from loosely to tightly coupled is developed herein. The theory has been verified for the loosely coupled transformer at frequencies from 100 Hz to 1 MHz, and for a moderately coupled transformer at 24 MHz. Design information is provided.