Modeling of Resonant Tunneling Diode Oscillators Based on the Time-Domain Boundary Element Method
Modeling of Resonant Tunneling Diode Oscillators Based on the Time-Domain Boundary Element Method
复制标题
基于时域边界元法的谐振隧道二极管振荡器建模
DOI：
10.1109/jmmct.2022.3187022
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发表时间：
2022
影响因子：
2.3
通讯作者：
Lasisi S
中科院分区：
文献类型：
--
作者：
Lasisi S
我们演示了如何耦合的全波时域边界元法（BEM）求解器与电路求解器可以用来模拟1）在共振隧穿二极管（RTD）振荡器的高频振荡的产生，和2）的相互耦合和同步的不相同的RTD的频率有显着差异，以实现相干功率组合。数值模拟表明，在同步设备中，单个振荡器的组合输出功率高达3.7倍。RTD的非微分电导被建模为具有非线性电流-电压关系的集总元件。集总元件以一致且独立于离散化的方式使用有限间隙模型耦合到辐射结构。由此产生的电路方程求解的同时和一致的时域电场积分方程，该模型的瞬态散射的电磁（EM）场从导电表面，使设备。本文介绍了三个新的元素：（一）一个独立的网格馈线RTD设备的馈线建模的应用，（二）辐射系统的耦合到一个强非线性组件与负微分电阻，和（三）验证此模型与电路模型在适用的情况下，对实验观察的同步时，两个RTD被放置在非常接近。这三个要素提供了一种方法，建立了模拟RTD源和相关技术的能力。
We demonstrate how the coupling of a full-wave time-domain boundary element method (BEM) solver with a circuit solver can be used to model 1) the generation of high frequency oscillations in resonant tunneling diode (RTD) oscillators, and 2) the mutual coupling and synchronization of non-identical RTDs with significant differences in frequencies to achieve coherent power combination. Numerical simulations show a combined output power of up to 3.7 times a single oscillator in synchronized devices. The non-differential conductance of the RTD is modeled as a lumped component with a non-linear current-voltage relationship. The lumped element is coupled to the radiating structure using a finite-gap model in a consistent and discretisation independent manner. The resulting circuit equations are solved simultaneously and consistently with time-domain electric field integral equations that model the transient scattering of electromagnetic (EM) fields from conducting surfaces that make up the device. This paper introduces three novel elements: (i) the application of a mesh independent feed line to the modelling of feed lines of RTD devices, (ii) the coupling of the radiating system to a strongly non-linear component with negative differential resistance, and (iii) the verification of this model with circuit models where applicable and against the experimental observation of synchronisation when two RTDs are placed in close proximity. These three elements provide a methodology that create the capacity to model RTD sources and related technology.