By Shiv Narayan, K. M. Divya, V. Krushna Kanth
This publication offers with the EM research of closed microwave cavities in accordance with a three-d FDTD procedure. The EM research is conducted for (i) oblong microwave ovens and (ii) hybrid-cylindrical microwave autoclaves at 2.45 GHz. the sphere distribution is first anticipated inside of household oblong ovens in xy-, yz-, and zx-plane. additional, the RF leakage from the oven door is set to review the impression of leakage radiation on instant communique at 2.45 GHz. in addition, the EM research of the autoclave is conducted in keeping with 3D FDTD utilizing staircase approximation. so that it will express the potential of autoclaves (excited with 5 resource) for curing the aerospace elements and fabrics, the sector 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 fitting expressions and illustrations.
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This ebook bargains with the EM research of closed microwave cavities in accordance with a 3-dimensional FDTD strategy. The EM research is conducted for (i) oblong microwave ovens and (ii) hybrid-cylindrical microwave autoclaves at 2. forty five GHz. the sector distribution is first predicted inside of household oblong ovens in xy-, yz-, and zx-plane.
Extra info for FDTD Modeling of EM Field inside Microwave Cavities
Finally, the total electric ﬁeld distribution inside the oven cavity is determined in zx-plane at different cuts along y-axis measured from right to left of cavity as shown in Figs. 26, 27, 28, 29, 30, 31, 32, 33, 34, and 35. Here, a band appears in the middle portion of zx-plane at all cuts due to the effect of magnetron source wave guide. 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.
2 20 0 0 20 40 60 80 100 120 0 Number of grids along z-axis of oven 180 Number of grids along x-axis of oven Fig. 2 20 0 0 20 40 60 80 100 120 Number of grids along z-axis of oven 0 4 Modeling of Curved Cavities Using FDTD 180 Number of grids along x-axis of oven Fig. 2 20 0 0 20 40 60 80 100 120 0 Number of grids along z-axis of oven 4 Modeling of Curved Cavities Using FDTD A uniform grid is very efﬁcient for computing the inner domain of homogeneous medium. However, modeling curved interfaces and boundaries, the approximation becomes coarse because it is difﬁcult to properly resolve the geometry using only horizontal and vertical planes.
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). Excellent agreement is observed between computed and reported results. 2 EM Analysis of Field Distribution Inside the Hybrid-Cylindrical Microwave Autoclave The EM analysis of ﬁeld distribution inside the cylindrical microwave autoclave is carried out in this work using three-dimensional FDTD method.