The equivalent source is a widely used approach for simulating hybrid electromagnetic (EM) field-circuit problems. In this approach, three techniques, e.g., the wire, surface, and volume structure, can be employed for embedding lumped circuits into finite difference time-domain cells. However, the volume structure technique introduced in previous studies may result in incorrect answers when addressing problems consisting of electronic devices loaded onto conductor strip gaps. To fix this problem, an extra processing method is proposed. Based on the condition of consistent potential on the same tangent plane in the loading direction, this approach assigns the EM field on the grids occupied by the lumped circuit to obtain the equivalent source information. A numerical example is presented, the structure of which consists of a Schottky diode mounted across a microstrip gap. The results validate the feasibility of the proposed method.

中文翻译：

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FDTD中采用体积结构技术的等效源建模方法

等效源是一种广泛用于模拟混合电磁（EM）场电路问题的方法。在这种方法中，可以采用三种技术（例如，导线，表面和体积结构）将集总电路嵌入到有限差分时域单元中。但是，在以前的研究中引入的体积结构技术可能会在解决由装在导体带隙上的电子设备组成的问题时导致错误的答案。为了解决这个问题，提出了一种额外的处理方法。基于在加载方向上相同切线平面上电位一致的条件，该方法在集总电路占据的网格上分配EM场，以获得等效的源信息。给出一个数值示例，其结构由安装在微带隙上的肖特基二极管组成。结果验证了该方法的可行性。