The time-domain simultaneous signal and noise analysis of mm-wave/THz devices (diode) modelled as a transmission line is considered. For such devices, stochastic telegrapher's equations of a transmission line are extracted assuming a quasi-transverse electromagnetic mode. Since the analytical solution for these equations does not exist, numerical analysis of such equations is presented here in millimetre-wave and terahertz frequencies. These equations are analysed with two different numerical methods in the time domain, namely the finite-integration technique and the Method of Moments. A semi-distributed model in the ADS commercial software is used to validate the numerical results. Non-linear effects in the model are introduced to simulate a Schottky diode. Using this non-linear model signal and noise behaviour in a Schottky diode is analysed, resulting in the simulation of the noise figure of the device.

中文翻译：

---

毫米波/太赫兹二极管的时域信号和噪声分析，基于随机电报方程的数值解

考虑了建模为传输线的毫米波/太赫兹器件（二极管）的时域同时信号和噪声分析。对于这种设备，假设准横向电磁模式，则提取传输线的随机电报方程。由于不存在这些方程式的解析解，因此此处以毫米波和太赫兹频率提供了此类方程式的数值分析。在时域中使用两种不同的数值方法来分析这些方程，即有限积分技术和矩量法。ADS商业软件中的半分布式模型用于验证数值结果。引入模型中的非线性效应以模拟肖特基二极管。使用这种非线性模型分析肖特基二极管中的信号和噪声行为，