The concept of overmoded coupling pattern for matching with the cut-off resonant condition in a THz sheet beam resonant system is proposed to build up super double-overmoded extended interaction field for high power THz radiation. A physical design procedure is proposed to support the matched overmoded coupling pattern. The three-dimensional electromagnetic characteristic of the super overmoded field is studied to demonstrate the effectiveness of the procedure for clarifying the relationship between the overmoded coupling pattern and cut-off resonant condition. This relationship is analyzed by focusing on (1) the distribution characteristic of the overmoded coupling pattern associated with the specific boundaries inside the structure, (2) the equivalent method for describing the interaction impedance in sheet beam system, (3) magnitude of the internal field strength, and (4) variation of the ohmic loss. The simulation results show the typical cut-off resonant condition can be es...

中文翻译：

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太赫兹薄板梁共振系统中截止扩展相互作用场的过调制耦合模式的三维电磁特性

提出了与太赫兹薄板共振系统中的截止共振条件相匹配的过调制耦合模式的概念，以建立大功率太赫兹辐射的超双过调制扩展相互作用场。提出了一种物理设计程序来支持匹配的过调制耦合模式。研究了超过模场的三维电磁特性，以证明澄清过模耦合模式与截止谐振条件之间关系的程序的有效性。通过关注（1）与结构内部特定边界相关的过调制耦合模式的分布特性，（2）描述薄板梁系统中相互作用阻抗的等效方法，（3）内部场强的大小，以及（4）欧姆损耗的变化。仿真结果表明，典型的截止谐振条件可以满足要求。