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基于肖特基势垒二极管三维电磁模型的220GHz三倍频器

Keywords: 太赫兹,平衡式倍频,肖特基势垒二极管,谐波平衡法

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Abstract:

采用阻性肖特基势垒二极管UMSDBES105a设计了一个太赫兹三倍频器.为了提高功率容量和倍频效率,该倍频器采用反向并联二极管对结构实现平衡式倍频.根据S参数测试曲线建立了该二极管的等效电路模型并提取了模型参数.由于在太赫兹频段二极管的封装影响到电路的场分布,将传统的二极管SPICE参数直接应用于太赫兹频段的电路设计存在一定缺陷,因此还建立了二极管的三维电磁模型.基于该模型研制出的220GHz三倍频器最大输出功率为1.7mW,最小倍频损耗为17.5dB,在223.5GHz~237GHz输出频率范围内,倍频损耗小于22dB.

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