Transmission line transformers with ultra low droop

Transmission line transformers (TLT´s), otherwise known as stacked cable transformers, are sometimes used in pulsed power systems as fast pulse transformers, particularly in systems where repetitive operation is required. However they have not gained widespread usage mainly because there is a fundamental lack of understanding of the way in which they operate. Consequently there have been no reliable circuit models available from which such devices can be designed to meet given performance characteristics. This paper describes a new model which allows very reliable predictions to be made of the way in which a given device will perform and which has led to the development of a new winding technique which allows transformers to be built with pulse rise-time and droop characteristics which far exceed those obtainable from conventional pulse transformers wound on magnetic cores