Peak pulse power enhancement via substrate integrated waveguides filled with non-linear dielectrics

Peak pulse power enhancement occurring in substrate integrated waveguides loaded with a nonlinear dielectric material was investigated via a series of finite difference, time domain simulations. The code was developed to run efficiently on GPU platforms thereby radically reducing solution runtimes and allowing a significant number of dielectric-waveguide models to be characterized. The low-loss ferroelectric dielectric Barium Strontium Titanate (BST) was selected as the fill dielectric due to its availability and current utilization by industry. A single probe feed was assumed with a single pulse, cosine modulated Gaussian voltage waveform. This research is an extension of the earlier work of Caudle et. al., and focuses on the effects of the waveguide´s dimensions and density of the fill dielectric. The results of the simulations indicate that a maximum peak pulse power enhancement of 11.25% and suggests the possibility of even greater power enhancement if global optimization is used.