Theory and Practice of Transmission Line Transformers

This tutorial introduces the theory and practice of transmission line transformers (TLT). In an innovative approach to the subject, Sevick divides TLTs into four classes: TLTs with ratios of 1:1, 1:4, less than 1:4 and greater than 1:4. The first two sections in this course cover 1:1 baluns and 1:4 baluns and ununs, as discussed by Guanella and Ruthroff. Additional sections review TLTs with ratios less than 1:4 and greater than 1:4, such as 1:6, 1:9, 1:12. The course concludes with a discussion of information on diode mixers and power combinerssplitters.The material covered in this course provides incentive to investigate:* The application of the latest TLT designs in broadband amplifiers and logic circuits* The advancement of the theory and broadband response of the TLT* The research in ferrite materials for high permeabilities with high bulk restivityApproximate running time is one hour.