The specific topics presented in subsequent sections include background of the modeling methods, with emphasis on mechanisms useful in coupled multiphysics analysis, error bounds due to numerical dispersion inherent to numerical algorithms, modeling of lossy materials crucial in the analysis of the microwave heating effect, modeling of dispersive media, and coupled analysis of microwave heating involving thermal variations of material parameters, heat conduction, and load rotation effects besides the EM phenomena. Properties important in the analysis of microwave power phenomena are stressed and shown to affect the computational accuracy when handled improperly. Several examples are provided to better illustrate the basic concepts of the modeling methods. Commercial electromagnetic simulation package CST Microwave Studio is used for the design and simulation of the antenna 3,7. Dacron fabric with a relative permittivity of 3 is used as a substrate. This chapter aims at providing an insight into simulations of microwave heating scenarios with both the finite difference time domain and EM algorithms in order to make advanced modeling easier and better understood. can be obtained by reducing its size, and by introducing a square notch in the ground and a novel slot in the patch.
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