Journal of South China University of Technology (Natural Science Edition) ›› 2011, Vol. 39 ›› Issue (10): 32-36,73.doi: 10.3969/j.issn.1000-565X.2011.10.006

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

Optimization Design of Filters Based on Parameter Extraction and Space Mapping

Chen Jian-zhong  Liang Chang-hong  Chen Jia  Deng Kun   

  1. Science and Technology on Antenna and Microwave Laboratory,Xidian University,Xi’an 710071,Shaanxi,China
  • Received:2010-12-14 Revised:2011-07-13 Online:2011-10-25 Published:2011-09-01
  • Contact: 陈建忠(1984-) ，男，博士，主要从事微波射频电路优化设计研究． E-mail:xjtucjz@gmail.com
  • About author:陈建忠(1984-) ，男，博士，主要从事微波射频电路优化设计研究．
  • Supported by:

    国家自然科学基金资助项目( 60901030， 60901031) ; 西安电子科技大学中央高校基本科研业务费专项资金资助项目( 72005477)

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Abstract:

In order to improve the design efficiency of microwave bandpass filters,an optimization design method is proposed based on the parameter extraction and the space mapping. In this method,first,the Cauchy-TLS ( Total Least Squares) method is used to obtain the rational fraction models of the filters. Next,by using these models,a fast convergent objective function is constructed to extract the equivalent circuit parameters. Then,according to the
principle of the space mapping,the problem of solving the optimal physical dimension of the filter is transformed into a quadratic constrained optimization model,and the corresponding solution is used to guide full-wave simulation of the filters. Finally,a dual-mode circular-waveguide filter is designed and machined,and its optimal physical dimension with ideal response is achieved after six iterations. It is found that the measured results accord well with the simulated ones.

Key words: microwave bandpass filter, Cauchy-the least square method, parameter extraction, space mapping