A new pocket-size radar that operates up to several years on AA batteries and costs only a few dollars is stimulating Laboratory research efforts and a variety of industrial products. Its many potential uses include security, rescue operations, and health monitoring.

Author:  THOMAS E. MCEWAN  

Pages/Year: 11 /1996

 

The Army Research Laboratory (ARL) is executing technology development programs to evaluate the potential use of ultra-wideband synthetic aperture radar (UWB SAR) technology to detect and classify targets concealed by foliage and subsurface targets. Under these programs, a very capable, 1-GHz-bandwidth, low-frequency, fully polarimetric, UWB SAR instrumentation system was developed to collect the data needed to support the penetrating radar studies. This paper describes two foliage and ground penetrating radar experiments conducted with this radar.

Author:  Karl A. Kappra, Francis Le, Lam Nguyen, Tuan Ton, Matthew Bennett  

Pages/Year: 5 /1996

 

This paper evaluates propagation data taken in the summer of 1995 in an office building. The source of RF energy was a sub-two-nanosecond pulse, that was transmitted at a PRF of 2 mega-pulses per second. Data was recorded with a high speed sampling oscilloscope at approximately 50 ps intervals over a time span of 300 ns. The purpose of this paper is to disseminate some simple and preliminary evaluations, thereby, stimulating discussion among interested engineers.

Author:  Paul Withington  

Pages/Year: 17 /1996

 

A time-hopping spread-spectrum communication system employing impulse signal technology has several features which may make it attractive for multiple access communications. These features are outlined and emerging design issues are described. Under ideal propagation conditions, multiple-access capability is estimated for such a communications system with analog frequency shift keyed modulations.

Author:  Moe Z. Win, Robert A. Scholtz, and Larry W. Fullerton  

Pages/Year: 6 /1996