Modified Ring Power Divider Using Stepped-Impedance Resonator
Keywords:Microstrip, Ring Power divider, Stepped-impedance resonator (SIR), Wideband
AbstractIn this paper, the design of a modified ring power divider dedicated for wideband communication or measurement systems is presented. The proposed power divider is built by using a conventional ring power divider and an additional Stepped-Impedance Resonator (SIR). The even-odd mode analysis is used to derive the design equations. In order to observe the bandwidth improvement, a comparative study between the designed device and the previously reported ring power divider is conducted. The electromagnetic (EM) simulated results show that the proposed divider has a fractional bandwidth of 90.2 % at the center frequency of 3.17 GHz and shows a bandwidth enhancement up to 27.2 % compared to the conventional ring structure. The measurement results of the fabricated prototype demonstrate high performance over the considered operational bandwidth from 1.7 GHz to 4.64 GHz with a return loss lower than -10 dB while maintaining a good insertion loss and a good isolation between the output ports. The maximum amplitude imbalance is better than 0.21 dB and the phase imbalance is better than 2.5 degrees between the output signals. The simulation and measurement results are in good agreement over the whole band of interest.
E. Wilkinson, “An N-Way Hybrid Power Divider,” IEEE Transactions on Microwave Theory and Techniques, vol. 8, no. 1, pp. 116–118, 1960.
Y. Sun and A. Freundorfer, “Broadband folded Wilkinson power combiner/splitter,” IEEE Microwave and Wireless Components Letters, vol. 14, no. 6, pp. 295–297, 2004.
X.-P. Ou and Q.-X. Chu, “A modified two-section UWB Wilkinson power divider,” 2008 International Conference on Microwave and Millimeter Wave Technology, 2008.
B. Mishra, A. Rahman, S. Shaw, M. Mohd, S. Mondal, and P. P. Sarkar, “Design of an ultra-wideband Wilkinson power divider,” 2014 First International Conference on Automation, Control, Energy and Systems (ACES), 2014.
R. Pazoki, M. R. G. Fard, and H. G. Fard, “A Modification in the Single-Stage Wilkinson Power Divider to Obtain Wider Bandwidth,” 2007 Asia-Pacific Microwave Conference, 2007.
T.-J. Chang, T.-J. Huang, and H.-T. Hsu, “A new design of wilkinson power divider using radial stubs featuring size reduction and bandwidth enhancement with physical isolation,” 2017 IEEE 18th Wireless and Microwave Technology Conference (WAMICON), 2017.
M. Z. B. M. Nor, S. K. A. Rahim, M. I. B. Sabran, and M. S. B. A. Rani, “Wideband Planar Wilkinson Power Divider Using Double-Sided Parallel-Strip Line Technique,” Progress In Electromagnetics Research C, vol. 36, pp. 181–193, 2013.
U. T. Ahmed and A. M. Abbosh, “Design of wideband single-layer in-phase power divider using microstrip to slotline coupled structure,” Microwave and Optical Technology Letters, vol. 57, no. 4, pp. 789–791, 2015.
S. S. Gao, S. Sun, and S. Xiao, “A Novel Wideband Bandpass Power Divider With Harmonic-Suppressed Ring Resonator,” IEEE Microwave and Wireless Components Letters, vol. 23, no. 3, pp. 119–121, 2013.
D. Hammou, E. Moldovan, and S. O. Tatu, “Novel MHMIC millimeter wave power divider/combiner,” 2011 24th Canadian Conference on Electrical and Computer Engineering (CCECE), 2011.
D. Hammou, M. Nedil, and S. Tatu, “Design of improved ring Wilkinson power divider for millimetre wave applications,” Electronics Letters, vol. 53, no. 8, pp. 542–544, 2017.
J.-T. Kuo and E. Shih, “Microstrip stepped impedance resonator bandpass filter with an extended optimal rejection bandwidth,” IEEE Transactions on Microwave Theory and Techniques, vol. 51, no. 5, pp. 1554–1559, 2003.
C.-Y. Hung, M.-H. Weng, Y.-K. Su, R.-Y. Yang, and H.-W. Wu, “Design of Compact and Sharp-Rejection Ultra-Wideband Bandpass Filters Using Interdigital Stepped-Impedance Resonators,” IEICE Transactions on Electronics, vol. E90-C, no. 8, pp. 1652–1654, 2007.
D. M. Pozar, Microwave engineering. New York: John Wiley & Sons, 2011.