Stepped transformers on TEM-transmission lines

• Published in: IEEE transactions on microwave theory and techniques Vol. 44; no. 6; pp. 793 - 798
• Main Authors: Meschanov, V.P., Rasukova, I.A., Tupikin, V.D.
• Format: Journal Article
• Language: English
• Published: IEEE 01-06-1996
• Subjects: Bandwidth; Chebyshev approximation; Frequency; Impedance; Microwave devices; Microwave measurements; Transformers; Transmission line matrix methods; Transmission line theory; Transmission lines
• ISSN: 0018-9480; 1557-9670
• DOI: 10.1109/22.506436

The paper presents comparative analysis of the properties of impedance stepped transformers both with monotonous and nonmonotonous step-to-step impedance variation. A miniature stepped transformer of a new structure based on a cascade of an even number of uniform transmission line sections has been synthesized. Section lengths are considerably shorter than a quarter of the central wavelength, and the section impedances alternate. The proposed transformers are the simplest to implement among the available analogs. As an example, the results of the solution of the Chebyshev approximation problem for the four- and six-section transformers of different specifications are given.