volume | PIER Journals

Abstract

In this article, a new design approach for an unequal coupled transmission line dual-band Wilkinson power divider is presented. A parallel short or open circuit stub is considered at the input port for dual frequency response, and two resistors are connected in order to isolate the outputs. The method is based on an even-odd mode procedure. The main objective of this paper is to fabricate a dual band Wilkinson power divider in order to achieve higher dividing ratio, simple structure, and easier fabrication. First, the desired power divider is divided to two parts known as even and odd mode equivalent circuits. Then by analyzing the circuits, the characteristic impedances are calculated. Next, the coupled transmission lines dimensions are extracted. Afterward by using the calculated characteristic impedances, an error function is formulated, and by minimizing, the isolating resistors are obtained. To clarify the applicability of this method, several microstrip power dividers which operate at both 1 GHz and 2.3 GHz with dividing ratio equal to 1.2589 are designed and simulated with the assumption that relative permittivity is equal to 2.56. In order to demonstration the advantage of using coupled lines tow dividers, one by separated-lines and the other one by coupled-lines are designed and compared with each other. The results illustrate that while the coupled-line dividers have simpler structure, they have significantly similar frequency operation to separated-line ones. Then the designed structure fabricated on an FR4 substrate and S parameters are measured. The results show excellent agreement with simulation.

1. Wilkinson, E. J., "An N-way hybrid power divider," IRE Transactions on Microwave Theory and Techniques, Vol. 8, No. 1, 116-118, 1960.
doi:10.1109/TMTT.1960.1124668 Google Scholar

2. Pozar, D. M., Microwave Engineering, 367-368, John Wiley & Sons. Inc., 1998.

3. Salimi, P., M. Moradianpour, and E. Borzabadi, "Broadband asymmetrical multi-section coupled line Wilkinson power divider with unequal power dividing ratio," Progress In Electromagnetics Research C, Vol. 43, 217-229, 2013.
doi:10.2528/PIERC13080201 Google Scholar

4. Lin, I.-H., M. DeVincentis, C. Caloz, et al. "Arbitrary dual-band components using composite right/left-handed transmission lines," IEEE Transactions on Microwave Theory and Techniques, Vol. 52, No. 4, 1142-1149, 2004.
doi:10.1109/TMTT.2004.825747 Google Scholar

5. Wu, L., H. Yilmaz, T. Bitzer, et al. "A dual-frequency Wilkinson power divider: For a frequency and its first harmonic," IEEE Microwave and Wireless Components Letters, Vol. 15, No. 2, 107-109, 2005.
doi:10.1109/LMWC.2004.842848 Google Scholar

6. Wu, Y., Y. Liu, Y. Zhang, et al. "A dual band unequal Wilkinson power divider without reactive components," IEEE Transactions on Microwave Theory and Techniques, Vol. 57, No. 1, 216-222, 2008. Google Scholar

7. Park, M.-J., "Two-section cascaded coupled line Wilkinson power divider for dual-band applications," IEEE Microwave and Wireless Components Letters, Vol. 19, No. 4, 188-190, 2009.
doi:10.1109/LMWC.2009.2015482 Google Scholar

8. Wu, Y., Y. Liu, and Q. Xue, "An analytical approach for a novel coupled-line dual-band Wilkinson power divider," IEEE Transactions on Microwave Theory and Techniques, Vol. 59, No. 2, 286-294, 2010.
doi:10.1109/TMTT.2010.2084096 Google Scholar

9. Li, J., Y. Wu, Y. Liu, J.-Y. Shen, S. Li, and C. Yu, "A generalized coupled-line dual-band Wilkinson power divider with extended ports," Progress In Electromagnetics Research, Vol. 129, 197-214, 2012.
doi:10.2528/PIER12050908 Google Scholar

10. Wang, X., I. Sakagami, A. Mase, et al. "Dual-band Wilkinson power divider and its miniaturization using coupled line sections," 2012 Asia Pacific Microwave Conference Proceedings, 1256-1258, IEEE, 2012.
doi:10.1109/APMC.2012.6421887 Google Scholar

11. Tsai, G.-D. and Y.-H. Pang, "Dual-band Wilkinson power divider using cross-paired coupled lines," 2012 Asia Pacific Microwave Conference Proceedings, 980-982, IEEE, 2012.
doi:10.1109/APMC.2012.6421798 Google Scholar

12. Wang, W. M. and Y. A. Liu, "A novel small-size coupled-line Wilkinson power divider for dual-band applications," Applied Mechanics and Materials, Vol. 437, 1066-1072, 2013.
doi:10.4028/www.scientific.net/AMM.437.1066 Google Scholar

13. Xu, X. and X. Tang, "A design approach for dual-band Wilkinson power divider with two pairs of coupled-line sections," Progress In Electromagnetics Research Letters, Vol. 45, 81-87, 2014.
doi:10.2528/PIERL14030802 Google Scholar

14. Maktoomi, M. H., D. Banerjee, and M. S. Hashmi, "An enhanced frequency-ratio coupled-line dual-frequency Wilkinson power divider," IEEE Transactions on Circuits and Systems II: Express Briefs, Vol. 65, No. 7, 888-892, 2017.
doi:10.1109/TCSII.2017.2749407 Google Scholar

15. Ravelo, B. and O. Maurice, "Kron-Branin modeling of YY-tree interconnects for the PCB signal integrity analysis," IEEE Transactions on Electromagnetic Compatibility, Vol. 59, No. 2, 411-419, 2016.
doi:10.1109/TEMC.2016.2610519 Google Scholar

16. Ravelo, B., O. Maurice, and S. Lallechere, "Asymmetrical 1: 2 Y-tree interconnects modelling with Kron-Branin formalism," Electronics Letters, Vol. 52, No. 14, 1215-1216, 2016.
doi:10.1049/el.2016.1142 Google Scholar

17. Kumar, A. and N. P. Pathak, "A compact reconfigurable concurrent dual-band Wilkinson power divider for noninvasive vital sign detection applications," 2014 International Conference on Signal Propagation and Computer Technology (ICSPCT 2014), 434-437, IEEE, 2014.
doi:10.1109/ICSPCT.2014.6885006 Google Scholar

18. Mohra, A. S., "Compact dual band Wilkinson power divider," Microwave and Optical Technology Letters, Vol. 50, No. 6, 1678-1682, 2008.
doi:10.1002/mop.23465 Google Scholar

19. Rostami, P. and S. Roshani, "A miniaturized dual band Wilkinson power divider using capacitor loaded transmission lines," AEU --- International Journal of Electronics and Communications, Vol. 90, 63-68, 2018.
doi:10.1016/j.aeue.2018.04.014 Google Scholar

20. Wang, X., N. Kimata, Z. Ma, et al. "Dual-band bandpass filter type Wilkinson power divider with microstrip composite resonators," 2017 IEEE Asia Pacific Microwave Conference (APMC), 299-301, IEEE, 2017.
doi:10.1109/APMC.2017.8251438 Google Scholar

21. Wang, X., I. Sakagami, Z. Ma, et al. "Generalized, miniaturized, dual-band Wilkinson power divider with a parallel RLC circuit," AEU --- International Journal of Electronics and Communications, Vol. 69, No. 1, 418-423, 2015.
doi:10.1016/j.aeue.2014.10.020 Google Scholar

22. Wang, Z., J. S. Jang, and C.-W. Park, "Compact dual-band Wilkinson power divider using lumped component resonators and open-circuited stubs," WAMICON 2011 Conference Proceedings, 1-4, IEEE, 2011. Google Scholar

23. Wu, Y., Y. A. Liu, and S. Li, "A compact pi-structure dual band transformer," Progress In Electromagnetics Research, Vol. 88, 121-134, 2008.
doi:10.2528/PIER08102601 Google Scholar

24. Lin, Z. and Q.-X. Chu, "A novel approach to the design of dual-band power divider with variable power dividing ratio based on coupled-lines," Progress In Electromagnetics Research, Vol. 103, 271-284, 2010.
doi:10.2528/PIER10012202 Google Scholar

25. Li, B., X. Wu, N. Yang, and W. Wu, "Dual-band equal/unequal Wilkinson power dividers based on coupled-line section with short-circuited stub," Progress In Electromagnetics Research, Vol. 111, 163-178, 2011.
doi:10.2528/PIER10110108 Google Scholar

26. Xi, L. and Y. Lin, "A novel design of dual-band Wilkinson power divider with simple structure and wide band-ratios characteristics," Journal of Electromagnetic Waves and Applications, Vol. 28, No. 13, 1635-1641, 2014.
doi:10.1080/09205071.2014.938171 Google Scholar

27. Bedar Khan, Z., H. Zhao, and Y. Zhang, "Simplified approach for design of dual-band Wilkinson power divider with three transmission line sections," Microwave and Optical Technology Letters, Vol. 58, No. 10, 2374-2377, 2016.
doi:10.1002/mop.30052 Google Scholar

28. Park, M.-J. and B. Lee, "A dual-band Wilkinson power divider," IEEE Microwave and Wireless Components Letters, Vol. 18, No. 2, 85-87, 2008.
doi:10.1109/LMWC.2007.915031 Google Scholar

29. Wu, Y., Y. Liu, S. Li, et al. "A new design method for unequal dual-band modified Wilkinson power divider," Electromagnetics, Vol. 30, No. 3, 269-284, 2010.
doi:10.1080/02726340903577434 Google Scholar

30. Wu, Y., Y. Liu, S. Li, et al. "Extremely unequal Wilkinson power divider with dual transmission lines," Electronics Letters, Vol. 46, No. 1, 90-91, 2010.
doi:10.1049/el.2010.2714 Google Scholar

31. Al Shamaileh, K., N. Dib, and S. Abushamleh, "A dual-band 1: 10 Wilkinson power divider based on multi-T-section characterization of high-impedance transmission lines," IEEE Microwave and Wireless Components Letters, Vol. 27, No. 10, 897-899, 2017.
doi:10.1109/LMWC.2017.2746665 Google Scholar

32. Li, X., Y.-J. Yang, L. Yang, S.-X. Gong, X. Tao, Y. Gao, K. Ma, and X.-L. Liu, "A novel design of dual-band unequal Wilkinson power divider," Progress In Electromagnetics Research C, Vol. 12, 93-100, 2010.
doi:10.2528/PIERC10010705 Google Scholar

33. Salimi, P., "A design procedure for multi-section micro-strip Wilkinson power divider with arbitrary dividing ratio," International Journal of New Technology and Research, Vol. 3, No. 12, 263170, 2017. Google Scholar

34. Mongia, R., I. J. Bahl, and P. Bhartia, RF and Microwave Coupled-line Circuits, 1999.

Ms. Puria Salimi

Dr. Mohsen Katebi Jahromi

Dr. Alireza Khoddam Astaneh Hossein