EM field monitoring in circular cavity using wire compact model implemented in cylindrical TLM mesh

This paper presents the procedure of compact wire model implementation in the 3-D TLM cylindrical mesh. It is based on the wire structures parameters calculation in conditions of variable cross-section of the TLM nodes through which wire conductor passes due to nature of cylindrical grid along the wire path. Efficiency of the wire model adapted to cylindrical mesh has been carried out on the example of a circular cylindrical metallic cavity when an EM field is excited and detected via wire probes. Obtained numerical results representing reflection and transmission characteristics have been compared with the results reached by TLM method based on a rectangular grid and experimental results. Model advantages in terms of analysis of cavity resonant frequency dependence of a feed probe radius have been considered.