J4 ›› 2010, Vol. 37 ›› Issue (2): 353-358.doi: 10.3969/j.issn.1001-2400.2010.02.030

• Original Articles • Previous Articles     Next Articles

Optimal design of the dual-frequency Wilkinson power divider with the genetic algorithm

WANG Wei1;LI Wen-cheng1;LAN Zhong-wen2;CHEN Dan1;ZHANG Kai1   

  1. (1. College of Electronics Eng., Chongqing Univ. of Post and Telecommunications, Chongqing  400065, China;
    2. College of Microelectronics and Solid State Electronics, UESTC, Chengdu  610054, China)
  • Received:2008-11-07 Online:2010-04-20 Published:2010-06-03
  • Contact: WANG Wei E-mail:wangwei@cqupt.edu.cn

Abstract:

The optimal design of the dual-frequency equal-split Wilkinson power divider with the genetic algorithm is proposed. The dual-frequency equal-split Wilkinson power divider is composed of a two-section transmission line transformer and two isolation resistors. Based on the ideal transmission line model, the even-odd mode technique is used to derive the design equations of parameters. Based on the above analysis, the parameters optimized with the Genetic Algorithm are discussed. In the Genetic Algorithm, elitist strategy、crossover and mutation of changing probability are preserved to prevent premature convergence. The performance of the Power Divider is analyzed by simulation with radio frequency software ADS. The result shows that impedances match well at all ports and that isolation between the two output ports is more than 40dB.Good performances of the optimized power divider at both frequencies are obtained.

Key words: dual-frequency Wilkinson power divider, genetic algorithm, optimal design