Confocal microwave imaging for breast cancer detection: Localization of tumors in three dimensions. IEEE Trans. Biomed. Eng. 2002, 49, 812–822. [CrossRef] [PubMed] 6. Buehrer, R.M.; Davis, W.A.; Safaai-Jazi, A.; Sweeney, D. Characterization of the ultra-wideband channel. In ...