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International Journal of Antennas and Propagation
Volume 2015, Article ID 658102, 7 pages
Research Article

Compact Unequal Power Divider with Filtering Response

1Information Network Engineering Research Center, South China University of Technology, Guangzhou 510640, China
2School of Electronic and Information Engineering, South China University of Technology, Guangzhou 510640, China

Received 16 November 2014; Accepted 30 December 2014

Academic Editor: Nima Chamanara

Copyright © 2015 Wei-Qiang Pan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We present a novel unequal power divider with bandpass responses. The proposed power divider consists of five resonators and a resistor. The power division ratio is controlled by altering the coupling strength among the resonators. The output ports have the characteristic impedance of 50 Ω and impedance transformers in classical Wilkinson power dividers are not required in this design. Use of resonators enables the filtering function of the power divider. Two transmission zeros are generated near the passband edges, resulting in quasielliptic bandpass responses. For validation, a 2 : 1 filtering power divider is implemented. The fabricated circuit size is 0.22 λg 0.08 λg, featuring compact size for unequal filtering power dividers, which is suitable for the feeding networks of antenna arrays.