Journal of South China University of Technology (Natural Science Edition) ›› 2015, Vol. 43 ›› Issue (3): 72-77.doi: 10.3969/j.issn.1000-565X.2015.03.011

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Dual-Band Orthogonal Power Divider with Variable Power Division Ratio Applied to ETC System

Li Hong-tao1 Wei Xiao-Dong1 Hu Bin-Jie1 Zhang Hong-lin1 Zeng Wei-sen2   

  1. 1． School of Electronic and Information Engineering，South China University of Technology，Guangzhou 510640，Guangdong，China;2． Faculty of Automation，Guangdong University of Technology，Guangzhou 510006，Guangdong，China
  • Received:2014-08-13 Revised:2014-11-27 Online:2015-03-25 Published:2015-02-10
  • Contact: 胡斌杰(1960-)，男，博士，教授，主要从事无线通信天线与电波传播、射频识别等研究． E-mail:eebjiehu@scut.edu.cn
  • About author:李红涛(1977-)，男，博士生，讲师，主要从事无线通信系统的研究． E-mail: LHT88@126． com
  • Supported by:

    Supported by the National Natural Science Foundation of China(NSFC)-Guangdong ( U1035002) and the Guangdong-Hong Kong Key Project of Science and Technology(2011A011305001，2011A011302001)

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Abstract: Proposed in this paper is a novel orthogonal Hybrid coupler applied to multi-beam electronic toll collec-tion (ETC) systems． In this coupler，two common frequency bands of ETC system including 2． 4 GHz (2． 2 ～2． 6GHz)and 5． 8GHz (5． 4 ～ 6． 0 GHz) are covered to adapt different working frequency bands，and different power distribution characteristics are endowed in the two frequency bands，that is，equally orthogonal output in 2． 4GHz band and orthogonal output in the range of 0． 5 ～7dB in 5． 8GHz band． The proposed divider is of broad bandwidth and small circuit size，and，it is proved feasible due to the good agreement between real test results and simulation data．

Key words: power divider, dual band, coupler, variable power division ratio, broadband