Revisiting the Binomial Multisection Transformer [Application Notes]

摘要

Presented here is an intuitive method for synthesizing the binomial multisection quarter-wave transformer. I discovered this method while teaching an undergraduate course in microwave engineering and termed it the Z-method. I have found that, compared to the approximate method based on the theory of small reflections [1], the Z-method is easier for students to grasp. The technique employs successive geometric means for finding the characteristic impedances of a binomial multisection transformer. It can be thought of as an extension of single-section, quarter-wave transformer design.