Real excitation modeling in a loaded cylindrical metallic cavity using 3-D TLM method

The example of a cylindrical metallic cavity with a rectangular cross section loaded with a dielectric slab placed on the bottom of the cavity, real excitation modeling, using the transmission-line modeling (TLM) wire node, is presented. We use a small wire conductor, as an excitation form, according to the wanted type of mode in the cavity. Also, a small wire conductor as a receiving probe is modeled. Water at a temperature of 20/spl deg/, is used as a dielectric layer. Its relative dielectric constant is calculated from Debby's formula. The modeling process is described and the numerical results obtained are compared with the results calculated by using the theoretical approach based on the transverse resonance (TR) method, and the experimental results and the appropriate conclusions are given.