A New Resonance Phenomenon Observed in UWB 14-50 GHz SAR and Its Application to the Retrieval of Thickness and Dielectric Properties of Scene Features. - Keith Morrison; Daniel Andre; John C. Bennett; Mark Finnis; David Blacknell; Darren Muff; Matt Nottingham; Claire Stevenson (IEEE Trans. Aerosp. Electron. Syst., 2021)