一种快速而准确的谐振腔传输线模型

针对双频点近似的谐振腔传输线模型效率低和精度差的问题,提出了基于Padé逼近的快速算法,同时给出相应的快速而精确的Spice兼容谐振腔模型.与单节电路近似的双频点近似算法相比,由于使用多节的修正电路,所以Padé逼近算法能灵活地调整谐振腔传输线模型的精度和效率,并使模型的精度更高和效率更快.仿真结果表明,在效率上,使用Padé逼近算法的谐振腔传输线模型远高于双频点近似模型,尤其是平行耦合传输线数量较多时;在精度上,Padé逼近的模型的误差低于0.007%,优于双频点近似模型的误差0.3%.

Fast and accurate cavity resonant transmission line model

For the low efficiency and poor accuracy of the resonant cavity transmission line model based on the double frequencies approximation, this paper proposes a fast algorithm based on Pade approximation and gives the corresponding fast and accurate Spice-compatible resonant cavity transmission line model. Compared with the double frequencies approximation using the single LC resonant circuit, Pade approximation can adjust flexibly and improve the efficiency and accuracy of the model due to using multiple LC resonant circuits. Simulation results show that the efficiency of Pade approximation is higher than that of the double frequencies approximation, especially when the number of transmission lines is great, and that the error of Pade approximation is less than 0.007% and is better than the error 0.3% of double frequencies approximation.