1. United States Patent—Reexamination Certificate, B1 5,361,070 (concerning T. McEwan's Ultra-Wideband Radar Motion Sensor, US Patent No. 5,361,070), May 16, 2000 (and references therein).
2. R.J. Fontana, A Brief History of UWB Communications, at http://www.multispectral.com/history.html.
3. Federal Communications Commission (FCC), Revisions of Part 15 of the Commission's Rules Regarding Ultra-Wideband Transmission Systems, Notice of Proposed Rule Making (NPRM), ET Docket 98-153, FCC 00-163, May 11, 2000 (see also at http://ftp.fcc.gov/oet/dockets/et98-153).
4. First European Workshop on Ultra-Wideband Technology, Brussels, Belgium, December 12, 2000.
5. CEPT European Radiocommunications Committee Workshop on Introduction of Ultra-Wideband Services in Europe, RegTP, Mainz, March 20, 2001 (presentations at http://www.ero.dk/ERC-WG Activities/Short-Range Devices).