Communications: directive radio wave systems and devices (e.g. – Transmission through media other than air or free space
Patent
1987-04-03
1991-04-30
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Transmission through media other than air or free space
342128, 342124, G01S 1334
Patent
active
050122487
ABSTRACT:
The invention is a device for determining the thickness of radar absorption material coatings. The device comprises a radiating element assembly 22 for transmitting RF energy to and recovering reflected RF energy from the coating. A source of frequency modulated RF signal, including an FM ramp generator assembly 11, buffer amplifier assembly 13 and Gunn oscillator 16, is provided. A ferrite circulator 20 is adapted to direct the source of modulated RF signal to the radiating element assembly 22 and the reflected RF energy to a detector assembly. The detector assembly includes a Schottky detector 24, a video amplifier assembly 40, a converter/driver assembly 42, and a digital display 44, and is adapted to sense the reflected RF energy from the coating and provide a visual display in the form of a voltage inversely proportional to the amount of the reflected RF energy. A portable power supply 10 is coupled to the detector assembly and the source of modulated RF signal to provide appropriate electrical power thereto.
REFERENCES:
patent: 4044353 (1977-08-01), Levy
patent: 4161731 (1979-07-01), Barr
patent: 4415898 (1983-11-01), Gaunaurd et al.
patent: 4458530 (1984-07-01), Bastida
patent: 4503433 (1985-03-01), Tomasi
Ash, Jr. Francis M.
Jost William R.
Munro John R.
Dachs Louis L.
Lockheed Corporation
Sotomayor John B.
Tarcza Thomas H.
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