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随着器件工作频率的升高,以集总元件模型描述大栅宽功率器件引入的误差将越来越大,且这一趋势随着栅长的减小更加显著。对微波大栅宽功率器件的分布性作了初步研究,对传统建模和器件优化方法进行改进,将器件中的有源部分和无源部分分离开,利用微波传输线理论和奇偶模分析对器件的无源部分建模,在满足集总条件时对有源区建模,将两者综合建立了分段的线性模型。与测量结果进行了比较,表明分段模型取得了更为精确的结果;在此基础上又建立了分段的非线性模型,模拟和验证了大栅宽器件的早期非线性现象;最后还提出了功率器件栅宽优化设计的估算方法。
As the operating frequency of the device increases, the error introduced by the lumped element model describing the wide gate wide power device will become larger and larger, and this trend becomes more significant as the gate length decreases. Based on the research on the distribution of microwave wide-gate power devices, the traditional modeling and device optimization methods are improved, the active and passive parts of the device are separated, and the microwave transmission line theory and the odd-even mode analysis are used to analyze the device The passive region is modeled. The active region is modeled when the lumped condition is satisfied, and the linear model of the segment is established synthetically. Compared with the measurement results, it shows that the segmentation model has got more accurate results. On this basis, a piecewise nonlinear model is established to simulate and verify the early nonlinear phenomenon of the large gate-wide devices. Finally, The power device gate width optimization design of the estimation method.