UWB is making steady progress in active tracking systems and passive tracking systems. I work for a company that does active tracking: http://pluslocation.com/

UWB is making steady progress in active tracking systems and passive tracking systems. I work for a company that does active tracking: http://pluslocation.com/ http://pluslocation.com/. PLUS is an offshoot of Time Domain, http://www.timedomain.com/ http://www.timedomain.com/. Time Domain does radar; I don't think they do any active tracking (could be wrong though). IIRC Time Domain is the company that did the see-through-walls system.