The fourth edition of this classic text on transmission line transformers for high frequencies includes new chapters on transmission line transformer efficiency, power combiners and mixer transformers, and equal-delay transformers. The new edition contains all the valuable information from earlier editions: the classic techniques of Guanella and Ruthroff as well as hundreds of real transformers constructed and measured to establish the practical levels of bandwidth and loss performance. 

Readers are encouraged to look beyond the design examples to learn the basic theory that makes transmission line transformers different. In most cases, they will have higher performance than conventional magnetic flux-coupled transformers.

Book contents

1. Analysis 

2. Low-Frequency Characterization 

3. High-Frequency Characterization 

4. Transformer Parameters for Low-Impedance Applications 

5. Transformer Parameters for High-Impedance Applications 

6. 1:4 Unbalanced-to-Unbalanced Transformer Designs 

7. Unbalanced-to-Unbalanced Transformer Designs with Impedance Ratios Less than 1:4 

8. Unbalanced-to-Unbalanced Transformer Designs with Impedance Ratios Greater than 1:4 

9. Baluns 

10. Multimatch Transformers 

11. Materials and Power Ratings 

12. Simple Test Equipment 

13. Hints and Kinks 

14. Summary Statements 

15. References 

16. Transmission Line Transformer Efficiency 

17. Notes on Power Combiners and Mixer Transformers 

18. Equal-Delay Transformers 

19. Additional References

About the author

Jerry Sevick earned a BS degree in education from Wayne State University in Michigan and a PhD in applied physics from Harvard University. Jerry's career reveals an interest in a variety of fields. He taught physics at Wayne State University, and joined the staff at AT&T Bell Laboratories in Murray Hill, New Jersey in 1956. He was a supervisor in groups working on high-frequency transistor and integrated-circuit development, and later he served as Director of Technical Relations.

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