基于空间映射法的微带双频滤波器优化设计  

Optimization of dual-band bandpass microstrip filter with space mapping algorithm

作　　者：赵惠玲[1] 王斐[1] 张国玺[1] 万国宾[1] 

机构地区：[1]西北工业大学电子信息学院,陕西西安710129

出　　处：《电波科学学报》2013年第3期455-460,共6页Chinese Journal of Radio Science

基　　金：航空科学基金资助项目(No.20101853019)

摘　　要：采用隐式空间映射法快速优化设计了一个工作在无线局域网络(WirelessLocal Area Networks;WLAN)和全球微波互联接入(Worldwide Interoperabilityfor Microwave Access,WiMAX)频段的微带双频带通滤波器.滤波器的粗糙模型和精确模型分别基于商业软件Agilent ADS的电路仿真和FEKO的矩量法电磁仿真,通过选择合适的辅助参数,建立起粗糙模型和精确模型间的映射关系.为改善微带双频滤波器隐式空间映射法优化设计中的弱收敛问题,提出一种有约束的参数提取方法,能够方便地应用于显式空间映射和隐式空间映射,较好地避免映射的非唯一性,改善了算法的收敛效率.以环形谐振滤波器为例,经过四次迭代获得一组满足指标的设计值,并加工实物后做测量,测试结果与仿真结果吻合较好,验证了具有约束的隐式空间映射方法设计微带双频滤波器的有效性和准确性.An implicit space mapping algorithm was used to optimize dual-band bandpass microstrip filter working in WLAN and WiMAX band. The coarse and fine models were based on the commercial software agilent ADS and FEKO respectively. A set of maps be- tween two models were established by choosing proper auxiliary parameters. In order to improve the convergence of the algorithms, a constrained parameter extraction idea was proposed. It can be applied to the implicit space mapping conveniently, and avoid the non- uniqueness of mapping through appropriate restrictions of the auxiliary parameters. It im- proves the convergence and robustness of the space mapping algorithm and so leads the optimization to the design goal efficiently. Take a dual-band ring-resonator band-pass mi- crostrip filter design as an example, only after four optimization iterations the design re- quirements are meet. The optimized filter was fabricated and measured. Measurement re- sults and simulation results matched well. It verified that the constrained implicit space mapping algorithm is an efficient method in the design of microstrip dual-band bandpass filter.

关 键 词：映射 微带双频带通滤波器 优化 

分 类 号：TN911[电子电信—通信与信息系统]