This article describes a novel model-order reduction (MOR) approach for efficient wide frequency band finite-element method (FEM) simulations of microwave components. It relies on the splitting of the system transfer function into two components: a singular one that accounts for the in-band system poles and a regular part that has no in-band poles. In order to perform this splitting during the reduction process, the projection basis is formed of two sets of orthogonal vectors that must be computed in sequence. The first set to be computed consists of the in-band eigenvectors that are associated with the dynamics of the electromagnetic field, while the second set uses the block moments of the original system, which are computed in the orthogonal complement to the subspace spanned by the in-band eigenvectors. The advantage of this method is that it results in a more compact reduced-order model than a method that employs only moment matching for the projection basis computations.

中文翻译：

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用于微波结构快速宽带有限元仿真的子空间分裂矩匹配模型降阶技术

本文介绍了一种新的模型降阶 (MOR) 方法，用于对微波组件进行高效的宽带有限元方法 (FEM) 仿真。它依赖于将系统传递函数分成两个部分：一个是带内系统极点，另一个是没有带内极点的规则部分。为了在缩减过程中进行这种分裂，投影基由两组必须按顺序计算的正交向量组成。要计算的第一组由与电磁场动力学相关的带内特征向量组成，而第二组使用原始系统的块矩，这些块矩是在由带内特征向量。