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模拟滤波器群时延及驻波比的优化设计

Telecommunication Engineering(2012)

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Abstract
针对网络综合方法不能直接对滤波器的群时延和驻波比同时设计的问题,提出了一种滤波器的幅频特性、群时延和驻波比特性同时优化的设计方法,即在网络综合法设计滤波电路的基础上,利用无约束优化方法对群时延和驻波比同时优化,降低通带内群时延波动和驻波比的最大值。从仿真结果可以看出,优化后滤波器幅频特性接近算术对称,群时延波动最大值17.337 ns,驻波比最大值仅为1.455 0。
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Key words
VSWR,amplitude-frequency characteristic,group-delay,analog filter,arithmetic symmetry,optimization design
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