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提出一种3频等分Wilkinson功率分配器(WPD)优化设计方法,该3频Wilkinson功率分配器由3节微带线和3个隔离电阻构成,根据理想传输线模型并利用奇偶模分析方法推得出设计方程,采用粒子群算法进行优化设计,有效提高功分器设计效率与准确性。为了验证设计的正确性,采用材料聚四氟乙烯(ε=3.65)作为基板设计出在0～4GHz 3频等分Wilkinson功分器,实验测试结果显示该功分器在所规定的全部频点拥有良好匹配与隔离度,说明粒子群算法在多频功分器设计中良好的应用。
A three-frequency, equally distributed Wilkinson power splitter (WPD) optimization design method is proposed. The three-frequency Wilkinson power splitter consists of three microstrip lines and three isolation resistors. According to the ideal transmission line model and using the method of odd-even mode analysis Out of design equations, the use of particle swarm optimization algorithm designed to effectively improve the power splitter design efficiency and accuracy. In order to verify the correctness of the design, the material Teflon (ε = 3.65) was used as the substrate to design a 3-frequency Wilkinson power splitter with 0-4GHz frequency band. Experimental results show that the power splitter operates at all specified frequencies Have a good match and isolation, indicating that the particle swarm optimization algorithm in the multi-frequency power splitter design a good application.