Numerical and Experimental Analysis of Electromagnetic Field in a Probe Coupled Cylindrical Metallic Cavity

The procedure for analysis of electromagnetic field in a cylindrical metallic cavity, based on reflection and transmission characteristic, is presented in the paper. An analysis of procedure efficiency to resonant modes identification is conducted numerically and experimentally verified. As a numerical tool, TLM time-domain method, enhanced with the compact wire model to account for the presence of feed and monitoring probes, is used. Conditions, in terms of probe dimension, for achieving the best source matching and optimum coupling between ports, are considered. Results obtained using reflection and transmission procedures are also compared, in terms of modes identification and resonant frequency dependence of probe dimensions. Key-Words: Cavity, Wire, Probe, TLM Time-Domain Method, Reflection, Transmission