Principle of capacitance compensation of power divider based on transmission-line transformer in ultra-shortwave band
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摘要: 设计了一种基于传输线变压器的超短波功分器,利用电报方程完成了对超短波功分器的建模,分析了功分器输入端驻波比、传输系数、分离端隔离度等性能,以及在不同位置补偿电容对功分器性能的影响。数值计算结果表明,补偿适当的电容能够使功分器输入端驻波比减小,传输系数和分离端隔离度增大。实验结果表明,补偿电容后功分器性能变化趋势与数值计算结果吻合。Abstract: A power divider based on transmission-line transformer in ultra-shortwave band is designed. The model of the power divider is given using the telegraph equation. Its characteristics including input SWR, transmission coefficient, isolation and the changes of these characteristics caused by different compensated capacitances are analyzed. The results of calculation indicate that the proper compensation capacitance could decrease the input SWR, increase the transmission coefficient and the isolation. The results of the experiment indicate that the changes of the characteristics of the power divider are consistent with the analysis and calculation when compensated with capacitance.
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