volume | PIER Journals

Abstract

A unequal Wilkinson power divider based on asymmetrical coupled line section is presented in this paper. The proposed unequal Wilkinson power divider topology uses asymmetrical coupled-line section and two transmission-line transformers. For simplification, a section asymmetrical coupled line is applied to obtain front compact matching structure. For generalization, three ports terminated impedances are defined as arbitrary values. In particular, the output ports impedances are arbitrary complex values. Design parameters and analysis equations for scattering parameters are also provided. In addition, the theoretical external performances of several examples are illustrated. Finally, the EM simulated results are validated with the characterization of two microstrip unequal power dividers at 2 GHz.

1. Wilkinson, E., "An N-way hybrid power divider," IRE Trans. Microw. Theory Tech., Vol. 8, No. 1, 116-118, 1960.
doi:10.1109/TMTT.1960.1124668

2. Lin, Z. and Q.-X. Chu, "In-/reverse-phase dual band power divider with variable division ratio," Journal of Electromagnetic Waves and Applications, Vol. 24, No. 14-15, 1897-1907, 2010.

3. Zhang, Z., Y.-C. Jiao, S. Tu, S.-M. Ning, and S.-F. Cao, "A miniaturized broadband 4:1 unequal Wilkinson power divider," Journal of Electromagnetic Waves and Applications, Vol. 24, No. 4, 505-511, 2010.

4. Wang, W., C. Liu, L. Yan, and K. Huang, "A novel power divider based on dual-composite right/left handed transmission line," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 8-9, 1173-1180, 2009.

5. Hosseini, F., M. Khalaj-Amirhosseini, and M. Yazdani, "A miniaturized Wilkinson power divider using nonuniform transmission line," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 7, 917-924, 2009.
doi:10.1163/156939309788355243

6. Chiang, C. T. and B.-K. Chung, "Ultra wideband power divider using tapered line," Progress In Electromagnetics Research, Vol. 106, 61-73, 2010.
doi:10.2528/PIER10061603

7. Wu, Y., Y. Liu, and S. Li, "An unequal dual-frequency Wilkinson power divider with optional isolation structure," Progress In Electromagnetics Research, Vol. 91, 393-411, 2009.
doi:10.2528/PIER09030501

8. Tang, X. and K. Mouthaan, "Analysis and design of compact two-way Wilkinson power dividers using coupled lines," Asia-Pacific Microw. Conf., 1319-1322, Dec. 7-10, 2009.

9. Ekinge, R. B., "A new method of synthesizing matched broadband TEM-mode three-ports," IEEE Trans. Microw. Theory Tech., Vol. 19, No. 1, 81-88, 1971.
doi:10.1109/TMTT.1971.1127448

10. Ahn, H.-R., Asymmetric Passive Components in Microwave Integrated Circuits, No. 2,6,7, Wiley, Hoboken, NJ, 2006.

11. Wu, Y., Y. Liu, S. Li, C. Yu, and X. Liu, "Closed-form design method of an N-way dual-band Wilkinson hybrid power divider," Progress In Electromagnetics Research, Vol. 101, 97-114, 2010.
doi:10.2528/PIER09111906

12. Wu, Y., Y. Liu, and Q. Xue, "An analytical approach for a novel coupled-line dual-band Wilkinson power divider," IEEE Trans. Microw. Theory Tech. , Vol. 59, No. 2, 286-294, 2011.
doi:10.1109/TMTT.2010.2084096

13. Wu, Y., Y. Liu, Q. Xue, S. Li, and C. Yu, "Analytical design method of multi-way dual-band planar power dividers with arbitrary power division," IEEE Trans. Microw. Theory Tech., Vol. 58, No. 12, 3832-3841, 2010.

14. Tripathi, V. K., "Asymmetric coupled transmission lines in an inhomogeneous medium," IEEE Trans. Microw. Theory Tech., Vol. 23, No. 9, 734-739, 1975.
doi:10.1109/TMTT.1975.1128665

15. Milligan, T. A., "Transmission-line transformation between arbitrary impedances," IEEE Trans. Microw. Theory Tech. (Letters), Vol. 24, No. 3, 159, 1976.
doi:10.1109/TMTT.1976.1128802

16. Potok, M. H. N., "Comments on `Transmission-line transforma tion between arbitrary impedances'," IEEE Trans. Microw. Theory Tech., Vol. 25, No. 1, 77, 1977.
doi:10.1109/TMTT.1977.1129040

17. Sonnet, EM., , v.11.53, Sonnet Software, North Syracuse, NY, 2008.

Prof. Yongle Wu

Dr. Yuan'an Liu