volume | PIER Journals

Abstract

This paper presents a novel structure for compact dual-band balun design. The proposed structure is based on modified Marchand (with the fourth port shorted). To achieve the desired dual-band operation, two additional open-ended stubs are added to the two balanced ports of the modified Marchand balun. Explicit design equations are then derived using even-odd mode analysis. Finally, to verify the design concept, a microstrip balun operating at 0.9/2 GHz are fabricated on Duroid RO3210 printed circuit board. Measurement results are in good agreement with the theoretical predictions.

1. Bawer, R. and J. J. Wolfe, "A printed-circuit balun for use with spiralantennas ," IRE Trans. Microw. Theory Tech., Vol. 8, 319-325, May 1960.
doi:10.1109/TMTT.1960.1125239

2. Hallfold, R., "A designer's guide to planar mixer baluns," Microwaves, Vol. 18, 52-57, December 1979.

3. Bassett, R., "Three balun designs for push-pull amplifiers," Microwaves, Vol. 19, 47-52, July 1980.

4. Ang, K. S. and Y. C. Leong, "Converting baluns into broad-band impedance-transforming 180 hybrids," IEEE Trans. Microw. Theory Tech., Vol. 50, 1190-1195, August 2002.

5. Rajashekharaiah, M., P. Upadhyaya, and H. Deukhyoun, "A compact 5.6 GHz low noise amplifier with new on-chip gain controllable active balun ," IEEE Workshop on Microelectronics and Electron Devices, 131-132, 2004.

6. Yoon, Y. J., Y. Lu, R. C. Frye, M. Y. Lau, P. R. Smith, L. Ahlquist, and D. P. Kossives, "Design and characterization of multiplayer spiral transmission-line baluns," IEEE Trans. Microw. Theory Tech., Vol. 47, 1841-1847, September 1999.
doi:10.1109/22.788521

7. Kraus, J. D. and R. J. Marhefka, Antennas for All Application, 3rd Ed., Chapter 23, McGraw-Hill, 2002.

8. Cho, C. and K. C. Gupta, "A new design procedure for single-layer and two-layer three-line baluns," IEEE Trans. Microw. Theory Tech., Vol. 46, 2514-2519, December 1998.
doi:10.1109/22.739242

9. Marchand, N., "Transmission-line conversion transformers," Electronics, Vol. 17, 142-146, December 1944.

10. Fathelbab, W. M. and M. B. Steer, "New classes of miniaturized planar Marchand baluns," IEEE Trans. Microw. Theory Tech., Vol. 52, No. 4, 1211-1220, April 2005.

11. Kuman, B. P. and G. R. Branner, "Optimized design of unique miniaturized planar baluns for wireless applications," IEEE Microw. Wireless Compon. Lett., Vol. 13, No. 2, 134-136, February 2003.

12. Lin, C.-M., C.-C. Su, S.-H. Hung, and Y.-H. Wang, "A compact balun based on microstrip EBG cell and interdigital capacitor," Progress In Electromagnetics Research Letters, Vol. 12, 111-118, 2009.
doi:10.2528/PIERL09092904

13. Yeh, Z.-Y. and Y.-C. Chiang, "A miniature CPW balun constructed with length-reduced 3 dB couples and a short redundant transmission line," Progress In Electromagnetics Research, Vol. 117, 195-208, 2011.

14. Jafari, E., F. Hojatkashani, and R. Rezaiesarlak, "A wideband compact planar balun for UHF DTV applications," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 14-15, 2047-2053, 2009.
doi:10.1163/156939309789932566

15. Basraoui, M. and S. N. Prasad, "Wideband, planar, log-periodic balun," IEEE MTT-S Int. Microwave Symp. Dig., Vol. 2, 785-788, June 1998.

16. Zhang, Z. Y., Y. X. Guo, S. H. Son, H. J. Lee, Y. J. Song, Y. W. Jeong, H. S. Park, and D. Ahn, "Design method of a dual band balun and divider," IEEE MTT-S Int. Microwave Symp. Dig., 1177-1180, June 2002.

17. Guo, Y., Z. Y. Zhang, L. C. Ong, and M. Y. W. Chia, "A novel LTCC miniaturized dual band balun," IEEE Microw. Wireless Compon. Lett., Vol. 16, No. 3, 143-145, March 2006.
doi:10.1109/LMWC.2006.869795

18. Yeung, L. K. and K. L. Wu, "A dual-band coupled-line balun filter," IEEE Trans. Microw. Theory Tech., Vol. 55, No. 11, 2406-2411, November 2007.
doi:10.1109/TMTT.2007.907402

19. Fathelbab, W. M., "Dual-band marchand baluns," IEEE International Microwave Symposium (IMS'08), 679-682, June 2008.

20. Zhang, H., Y. Peng, and X. Hao, "A tapped stepped-impedance balun with dual-band operations," IEEE Antennas and Wireless Propagation Lett., Vol. 7, 119-122, 2008.
doi:10.1109/LAWP.2008.921315

21. Zhang, H. and X. Hao, "A dual-band dipole antenna with integrated-balun," IEEE Trans. on Antennas and Propagation, Vol. 57, No. 3, 786-789, March 2009.
doi:10.1109/TAP.2009.2013440

22. Leong, Y. C., K. S. Ang, and C. H. Lee, "A derivation of a class of 3-port baluns from symmetrical 4-port networks," IEEE MTT-S Int. Microwave Symp. Dig., June 2002.

23. Ang, K. S., Y. C. Leong, and C. H. Lee, "Analysis and design of miniaturized lumped-distributed impedance transforming baluns," IEEE Trans. Microw. Theory Tech., Vol. 51, No. 3, 1009-1017, March 2003.
doi:10.1109/TMTT.2003.808677

24. Matthaei, G., L. Young, and E. M. T. Jones, Microwave Filters, Impedance-Matching Networks, and Coupling Structures, Artech House, 1980.

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Dr. Kevin Chen