A Novel Space-Stepping Finite-Difference Frequency–Domain Method for Full Wave Electromagnetic Field Modeling of Passive Microwave Devices
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A Novel Space-Stepping Finite-Difference Frequency–Domain Method for Full Wave Electromagnetic Field Modeling of Passive Microwave Devices摘要
In this paper a novel space-stepping finite-difference frequency-domain (SSFDFD) method is presented for the analysis of passive microwave devices. Unknown electromagnetic (EM) fields are solved from given EM fields at two initial planes space-step by space-step along a spatial direction. SSFDFD has the advantage over the traditional FDFD method in that all the EM field unknowns are local variables and the solution of a huge matrix equation is avoided. The stability condition for the SSFDFD method is derived as that for the finite-difference time-domain (FDTD) method. Application examples show that the stability condition is valid and the SSFDFD method is at least one magnitude faster than the traditional FDFD method with the same accuracy of analysis. SSFDFD has the potential to be a powerful and fast tool for full wave EM field modeling of passive microwave devices.
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