--------------------------------------------------------------------------- TWR4.....GROUND [**OR HOME/APT WALL**] PENETRATING RADAR THIS IS TEXT EXCERPTED FROM GROUND-PENETRATING RADAR MANUFACTURER PATRIOT SCIENTIFIC CORPORATION. THE PURPOSE OF INCORPORATING THIS TEXT IS THAT GROUND-PENETRATING RADAR SYSTEMS OVERCOME THE PARTLY- CONDUCTIVE-WALL BARRIER TO PASSIVE MILLIMETER WAVE THRU-WALL RADAR. The original link for this text (as of March 22, 2000) is: http://www.ptsc.com/radar/index.html Patriot Scientific Corporation Patriot Scientific Corporation has developed radar technologies with a wide range of possible applications. This description below will highlight possibilities for use in: - Ground Penetrating Radar (GPR) - Communications - Surveillance - Ordnance Detection - Stealth Radar The Demonstration System:

...is a diagram of the demonstration system. A pulse generator is used to drive the transmit antenna. The pulse is a positive spike going up to 100V then falling back to ground in one and a half nanoseconds corresponding to a pulse transmit frequency of 750 MHz. -104-