Ultra Wide Band -High Power Radar-Material Responses II (Waveform and Material Density)

This paper presents numerical calculations for high power ultra wide band radars interacting with EMI and radar suppression magnetic materials and components, e.g. isolators, EMI, coatings and/or various appliqus. Exposure may occur within the radar system or on a radiated target. New dynamic micromagnetic simulators are applied to predict non-linear permeability time and frequency response of micro and nano scale magnetic particles which may be used in composites. The paper predicts non-linear material response as a function of incident pulse shape, frequency spectra, various incident fields strengths for hard and soft magnetic material; calculates magnetic particle permeability and then applies effective media theory to predict pulse reflection. Results suggest exotic interactions may significantly alter the input impedance of devices and surfaces containing magnetic materials; changing reflection and absorption.