Cascaded microwave networks numerical analysis methods based on the strong coupling mechanism

This paper presents a novel coupling cascaded method (CCM) to address the computational accuracy degradation encountered in two-port strongly coupled cascaded microwave networks (SCCMN) when employing microwave network analysis algorithm, which arises from the electromagnetic coupling effects between microwave networks. Based on the CCM, a binary interpolation coupling cascaded method (BICCM) is innovatively proposed to enhance computational accuracy for the SCCMN composed of identical network elements. Furthermore, considering the imbalance between computational accuracy and simulation time overhead in the BICCM, a coupling degradation method is introduced to achieve a reasonable balance between these two factors. The experiment results demonstrate that the proposed CCM has significantly enhanced the correlation coefficient by an average of 13.47% for the S₁₁ scattering parameters and 7.49% for the S₂₁ scattering parameters compared to the traditional cascade theory (TCT). Moreover, for the S₂₁ scattering parameters, the proposed BICCM without coupling degradation has significantly enhanced the correlation coefficient by an average of 30.7% compared to the BICCM with the maximum coupling degradation. Therefore, the findings of this study provide new perspectives and methodologies for the development of microwave network analysis techniques, offering potential application value in the cascade design of microwave devices.