Fast calculation of dielectric substrate losses in microwave applications by the FD2TD method using a new formalism

The paper deals with the electromagnetic characterization of a dielectric substrate by a numerical analysis. The electromagnetic analysis is performed by a frequency-dependent finite difference time domain (FD²TD) method with a new formulation. A multi-pole Debye dispersive relation is used to model frequency-dependent properties of dispersive dielectrics. The proposed method is suitable to predict efficiently substrate dielectric losses in microwave and RF applications.