基于单π模型的RF螺旋电感模型及参数提取法

RF Spiral Inductance Model and Parameter Extraction Method Based on Single π Model

提出了一种基于单π模型的RF螺旋电感等效电路模型及参数提取方法。该模型在传统单π模型基础上,增加支路间的并联RC网络来表征衬底耦合。在串联支路,增加RL网络来模拟趋肤效应和邻近效应。采用分频段的方法来合理简化等效电路。采用直接解析法来获得等效电路网络中所有的模型参数,无需任何优化。验证结果表明,在0~40 GHz范围内,模型值与仿真值吻合较好。该模型及参数提取方法不仅能简化计算量,还能更好地解释电路行为,对RFIC设计有参考价值。

An improved RF spiral inductor equivalent circuit and parameter extraction method based on singleπmodel was introduced.A parallel RC network between the branches was added to characterize the substrate coupling,and an RL network in the series branch was added to simulate the skin effect and proximity effect.The sub-bands rationally simplified the equivalent circuit and directly analyzed all the model parameters in the equivalent circuit network without any optimization.It was verified that the modeled values and simulated values could be well matched in the range of 0-40 GHz.Therefore,the model and parameter extraction could not only reduce the amount of calculation,but also better explain the circuit behavior,which was helpful for the RFIC design.