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2012-07-26
Nonsynchronous Noncommensurate Impedance Transformers
By
Progress In Electromagnetics Research B, Vol. 42, 405-424, 2012
Abstract
Nonsynchronous noncommensurate impedance transformers consist of a combination of two types of transmission lines: transmission lines with a characteristic impedance equal to the impedance of the source, and transmission lines with a characteristic impedance equal to the load. The practical advantage of such transformers is that they can be constructed using sections of transmission lines with a limited variety of characteristic impedances. These transformers also provide comparatively compact size in applications where a wide transformation ratio is required. This paper presents the data which allows to estimate the achievable total electrical length and in-band reflection coefficient for transformers consisting of up to twelve transmission line sections in the range of transformation ratios r=1.5 to 10 and bandwidth ratios χ=2 to 20. This data is obtained using wave transmission matrix approach and experimentally verified by synthesizing a 12-section nonsynchronous noncommensurate impedance transformer. The measured characteristics of the transformer are compared to the characteristics of the conventional tapered line transformer.
Citation
Vitaliy Zhurbenko, and Kseniya Kim, "Nonsynchronous Noncommensurate Impedance Transformers," Progress In Electromagnetics Research B, Vol. 42, 405-424, 2012.
doi:10.2528/PIERB12052507
References

1. Meschanov, V. P., I. A. Rasukova, and V. D. Tupikin, "Stepped transformers on TEM-transmission lines," IEEE Trans. on Microw. Theory and Tech., Vol. 44, No. 6, 793-798, Jun. 1996.
doi:10.1109/22.506436

2. Zhurbenko, V., V. Krozer, and T. Rubæk, "Impedance transformers," Passive Microwave Components and Antennas, 303-322, Ed. by V. Zhurbenko, Sciyo, 2010.

3. Jensen, T., V. Zhurbenko, V. Krozer, and P. Meincke, "Coupled transmission lines as impedance transformer," IEEE Trans. on Microw. Theory and Tech, Vol. 55, No. 12, 2957-2965, Dec. 2007.
doi:10.1109/TMTT.2007.909617

4. Li, Q., X. Lai, B. Wu, and T. Su, "Novel wideband coaxial filter with high selectivity in low rejection band," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 8-9, 1155-1163, 2009.

5. Rosloniec, S., "Algorithms for the computer-aided design of nonsynchronous, noncommensurate transmission-line impedance transformers," Int. Journal Microw. and Millimeter-wave Computer-aided Engineering, Vol. 4, No. 3, 307-314, Mar. 1994.
doi:10.1002/mmce.4570040310

6. Tsai, C. M., C. C. Tsai, and S. Y. Lee, "Nonsynchronous altering-impedance transformers," Asia-Pacific Microw. Conf., Vol. 1, 310-313, Dec. 2001.

7. Rosłniec "An optimization algorithm for design of eight-section of nonsynchronous, noncommensurate impedance transformers," Proc. of the Microwave and Optronic Conf. MIOP'97, 477-481, Stuttgart, Sindelfingen, Apr. 1997.

8. Katz, B. M., V. P. Meschanov, and A. L. Feldstain, "Optimal synthesis of TEM microwave devices," Radio i Svjaz, V. P. Meschanov, Ed., Moscow, 1984.

9. Rosłniec, S., Fundamental Numerical Methods for Electrical Engineering, 283, Springer, 2008.

10. Matthaei, G., L. Young, and E. M. T. Jones, Microwave Filters, Impedance Matching Networks, and Coupling Structures, Artech House, Inc., Norwood, Massachusetts, 1980.

11. Zhurbenko, V., K. Kim, and K. Narenda, "A compact broad-band nonsynchronous noncommensurate impedance transformer," Microw. and Optical Tech. Letters, Vol. 54, No. 8, 1832-1835, Aug. 2012.
doi:10.1002/mop.26975

12. DPozar, D. M., Microwave Engineering, 3rd edition, 700, John Wiley & Sons, Inc., 2005.