Communications: directive radio wave systems and devices (e.g. – Transmission through media other than air or free space
Patent
1996-03-01
1998-08-18
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Transmission through media other than air or free space
342 25, 342179, 342180, 342196, 342197, G01S 1389, G01S 1390
Patent
active
057963630
ABSTRACT:
An imaging system for analyzing structures comprises a radar transmitter and receiver connected to a timing mechanism that allows a radar echo sample to be taken at a variety of delay times for each radar pulse transmission. The radar transmitter and receiver are coupled to a position determining system that provides the x,y position on a surface for each group of samples measured for a volume from the surface. The radar transmitter and receiver are moved about the surface to collect such groups of measurements from a variety of x,y positions. Return signal amplitudes represent the relative reflectivity of objects within the volume and the delay in receiving each signal echo represents the depth at which the object lays in the volume and the propagation speeds of the intervening material layers. Successively deeper z-planes are backward propagated from one layer to the next with an adjustment for variations in the expected propagation velocities of the material layers that lie between adjacent z-planes.
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Jeffrey Edward Mast, "Microwave Pulse-Echo Radar Imaging for the Nondestructive Evaluation of Civil Structures," Thesis, University of Illinois at Urbana-Champaign, Urbana, Illinois, 1993.
Main Richard B.
Sartorio Henry P.
Sotomayor John B.
The Regents of the University of California
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