Communication terminal having detector method and apparatus for

Details Communication terminal having detector method and apparatus for Communication terminal having detector method and apparatus for

1996-12-30

1998-09-08

Mullen, Thomas

Communications: electrical

Condition responsive indicating system

Specific condition

340552, 343894, 455 90, 455129, G08B 2100

Patent

active

058050671

ABSTRACT:
A proximity detector detects objects which may interfere with a wireless antenna beam. The proximity detector includes infrared sensors, sonar detectors, motion detectors and optical devices to determine a range and bearing of objects that may interfere with the antenna beam.
When an object may be harmed or interfere with the antenna beam, an alarm may be activated to warn the user and/or the object of potential harm from the electro-magnetic energy transmitted by the directed antenna. Also, based on the proximity detector's outputs, an antenna beam pattern may be changed to reduce the power at the object or the transmitted power may be reduced to prevent harm to the object.

REFERENCES:
patent: 4931802 (1990-06-01), Assal et al.
patent: 4949074 (1990-08-01), D'Ambrosia et al.
patent: 4967183 (1990-10-01), D'Ambrosia et al.
patent: 5257405 (1993-10-01), Reitberger
patent: 5440290 (1995-08-01), McCullough et al.
patent: 5623269 (1997-04-01), Hirshfield et al.

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