表面PIN二极管的电磁辐射特性分析
Analysis of the Electromagnetic Radiation Characteristics of Surface PIN Diode

以表面PIN二极管（SPIN）为研究对象，根据半导体内非平衡载流子双极性扩散方程，推导了外加电场条件下,稳态时本征区载流子浓度一维连续性方程，数值求解了大电流注入条件下本征区固态等离子体电导率。基于固态等离子体电导率在ADS软件中构建可重构贴片单极天线结构，仿真验证了大电流注入条件下，SPIN具有一定的类金属电磁辐射特性。实验结果表明可以用SPIN替代金属作为基本辐射单元构建可重构天线阵列。
According to ambipolar diffusion equation of the non-equilibrium carriers in a semiconductor, a one-dementional continuity equation of carrier concentration in the intrinsic area of suface PIN diode (SPIN) at steady state under an applied electric field was derived and the conductivity of solid-state plasma in this area with high current injected was caculated out. Based on this conductivity, a reconfigurable patch monopole antenna structure was built and simulated in Advanced Design System (ADS), the result showed that SPIN has similar electromagnetic radiation characteristics to metals under high current injection , which means SPIN can be used as basic radiating element，instead of metals, to build reconfigurable antenna array