Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1993-08-31
1995-11-21
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
342 81, H01Q 322
Patent
active
054691761
ABSTRACT:
A method and apparatus for resolving a radar return by an object or layer below the earth's surface from a radar return of an air-to-earth interface. More specifically, a method and apparatus for generating short pulsewidth, broad bandwidth RF signals and for effecting control and timing of transmitted and received radar signals in order to focus an antenna illumination pattern. The apparatus includes an antenna array including a plurality of antenna elements which transmit and receive the RF pulsed signals and a custom control module which generates the control signals fed to the antenna array to delay the RF pulse signals with respect to each other, upon transmission and receipt, in order to form transmit and receive antenna illumination patterns.
REFERENCES:
patent: 2041600 (1936-05-01), Frus
patent: 5063390 (1991-11-01), Konig
patent: 5339080 (1994-08-01), Steinway et al.
Schutz, "A Digitally Controlled Beam-Steered Array," Ultra-Wideband Radar, pp. 299-308.
Bruce Noel, "Ultra-Wideband Radar: Proceedings Of The First Lost Alamos Symposium", CRC Press, Inc., 1991.
Borkowski Rudolph
Crandall Alan
Johnson Gilbert
Sandler Sheldon
Schwarzkopf Daniel
Geo-Centers, Inc.
Phan Dao L.
Tarcza Thomas H.
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