Broadband Equal Power Divider

D. Packiaraj, M Ramesh, A. T. Kalghatgi


This paper presents the design of broadband two way equal power divider in microstrip medium with defected ground structure suitable for broadband communication systems. Quarter wave broadside coupled lines are used in the place of conventional transformers widely used in the popular Wilkinson power dividers. The proposed power divider structure takes the advantage of top and bottom layers of the microstrip medium to create broadside
coupled line configuration using defected ground plane. The floating conductor in the bottom layer plays a critical role in achieving the band select characteristics. Experimental results of two way equal power divider designed using the proposed structure has been verified against the full wave simulations. The isolation between the paths is more than 20dB and the return loss at each port is better than 15dB across the desired band of 3GHz to 8GHz.


Microstrip; Power divider; Broadband; Wilkinson

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D.M. Pozar, Microwave Engineering, Addision-wesley, 1990.

G. Matthaei, G. L. Young, and E. M. T. Jones, Microwave Filters, Impedance Matching Networks and Coupling structures, Artech,1985.

R. E. Collin, Theory and design of wideband multisection quarterwave transformers, Proc. IRE, Vol. 43, No 2, pp. 179–185, 1955.

E. J. Wilkinson, An N-way hybrid power divider, IEEE Trans. Microwave Theory Tech, Vol. 8, No 1, pp. 116–118, 1960

Y. Sun, and A. P. Freundorfer, Broadband Folded Wilkinson Power Combiner/Splitter, IEEE Microw. Wireless Compon.Lett, Vol. 14,No. 6, pp. 295-297, 2004.

J. P. Shelton, J. Wolfe, and R. C. Wagoner, Tandem couplers and phase shifters for multioctave bandwidth, Microwaves, 1965, pp.14–19.

J. H. Cho, H. Y. Hwang, and S. W. Yun, A design of wideband 3- dB coupler with N-section microstrip tandem structure, IEEE Microw. Wireless Compon.Lett, Vol. 15, No. 2, pp. 113–115, 2005.

S. Uysal and H. Aghvami, Synthesis, Design and Construction of Ultra-Wideband Nonuniform Directional couplers in Inhomo-geneous Media, IEEE Trans. Microwave Theory Tech, 1989, Vol. 37, No. 6, pp. 969-976.

S. G. Mao, and M. S. Wu, A novel 3-dB directional coupler with broad bandwidth and compact size using composite right/lefthanded coplanar waveguides," IEEE Microw. Wireless Compon.Lett, Vol. 17, No. 5, pp. 331-333, 2007.

S.W. Wong, and L. Zhu, Ultra-wideband power dividers with good isolation and improved sharp roll-off skirt, IET Microw.Antennas Propag., Vol. 3, Iss. 8, pp. 1157–1163, 2009.

D. Packiaraj, M. Ramesh and A. T. Kalghatgi, Band select ultra wide band unequal power splitter , Microwave and optical technology letters, Vol. 58, No. 7, pp. 1563-1566, 2016.

A. M. Abbosh, Ultra wideband inphase power divider for multilayer technology, IET Microw. Antennas Propag., Vol. 3, Iss. 1, pp.148–153,2009.

"IE3D,`` Mentor Graphics Corp, Release 15.1, 2011.



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