Communications: directive radio wave systems and devices (e.g. – Testing or calibrating of radar system
Patent
1983-12-27
1990-08-07
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Testing or calibrating of radar system
342 4, G01S 740
Patent
active
049471759
ABSTRACT:
An improved radar range comprising a ground plane (22), support means (28) for supporting a target (26) a selected height above the ground plane, transmitting means (24) for directing for a selected period of time an electromagnetic wave at the target, means (30, 32) for increasing the time required for the portion of the electromagnetic wave reflected off the target toward the ground plane to return to the target, and receiving means (24) for receiving for a selected period of time the portion of the electromagnetic wave that is backscattered by the target. In a particular embodiment, the means for increasing the return time includes means for recessing the support means a selected distance below the ground plane by providing a diffraction ridge (30) a selected distance from the support means toward the transmitting means with the ridge sloping down to the selected distance below the ground plane.
REFERENCES:
patent: 2622242 (1952-12-01), Freedman et al.
patent: 2763001 (1956-09-01), Bussey
patent: 3495265 (1970-02-01), Smith
patent: 3982249 (1976-09-01), Toman
patent: 4184155 (1980-01-01), Silvertson, Jr.
patent: 4651160 (1987-03-01), Bornkast et al.
Lockheed Corporation
Smith Frederic P.
Sotomayor John B.
Tarcza Thomas H.
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