By Shiv Narayan, K. M. Divya, V. Krushna Kanth

This publication offers with the EM research of closed microwave cavities in line with a three-d FDTD approach. The EM research is performed for (i) oblong microwave ovens and (ii) hybrid-cylindrical microwave autoclaves at 2.45 GHz. the sector distribution is first expected inside of household oblong ovens in xy-, yz-, and zx-plane. extra, the RF leakage from the oven door is set to review the impact of leakage radiation on instant conversation at 2.45 GHz. moreover, the EM research of the autoclave is conducted according to 3D FDTD utilizing staircase approximation. which will convey the aptitude of autoclaves (excited with 5 resource) for curing the aerospace parts and fabrics, the sphere distribution inside of autoclave hollow space is studied in presence of aerospace samples. The FDTD established modelling of oven and autoclave are defined with the precise expressions and illustrations.

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To conclude, the total electric field distribution inside the oven is not uniform in all planes. Moreover, it varies with respect to different cuts in each plane. The amplitude of field distribution in xy- and yz-planes of the oven cavity is better than that of zx-plane. In order to have uniform field distribution inside the oven cavity, the position of microwave source needs to be optimized. FDTD Modeling of EM Field Inside Microwave Cavities Fig. 1 Number of grids along y-axis of oven 16 0 0 20 40 60 80 100 120 0 Fig.

K surface). The consideration of EM fields in three dimensions is represented in Fig. 41. Here, a plane wave is assumed to be generated from a plane of the problem space. If it is considered to be in zxplane, the plane wave will be added at j = jm and subtracted out at j = jn. This is accomplished by adding to D or H fields which are on the boundary and subtracting out from those which are next to the boundary according to the expressions from Eqs. (20a) to (22b). In addition, km and kn surfaces are also considered in 3D FDTD simulation, as given in Eq.

3. In the FDTD simulation, the problem space is first assumed to be free space and each cell is divided into nine subcells. The distance of each cell from the center of the problem space is then calculated. 3 GHz. 3 Else e = 1 and r = 0. The contribution of the dielectric properties to the total effective permittivity and conductivity is determined from Eqs. (18) and (19). The scattered field from dielectric cylinder is computed for the time steps, 25, 50, and 75, as shown in Figs. 37, 38, and 39, respectively, and is validated with the reported results given in Sullivan (2000).

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