Communications: directive radio wave systems and devices (e.g. – Determining distance – Material level within container
Patent
1990-09-06
1991-10-01
Barron, Jr., Gilberto
Communications: directive radio wave systems and devices (e.g.,
Determining distance
Material level within container
342118, G01S 1308
Patent
active
050537768
ABSTRACT:
The device includes a transmitting antenna which also serves as a receiving antenna and a separate receiving antenna for receiving the signals transmitted by the transmitting antenna and reflected at the point of reflection, and two data processing units, one for the signals picked up by the transmitting and receiving antenna and transmitted through a circulator and a first mixer, the other for the signals picked up by the receiving antenna and transmitted through a second mixer. The distance measurement is computed using the signals picked up by the transmitting and receiving antenna for distances less than a predetermined threshold and using the signals picked up by the receiving antenna for distances greater than the predetermined threshold.
REFERENCES:
patent: 2420408 (1947-05-01), Behn
Breden Emile
Lonardi Emile
Loutsch Jeannot
Mawhinney Daniel D.
Barron Jr. Gilberto
Paul Wurth S.A.
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