Intruder alarm
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United States of America Patent
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Issued Date -
Sep 20, 2007
app pub date -
Feb 28, 2007
filing date -
Feb 28, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An intruder alarm, for example, a vehicle intruder alarm, uses a microwave transceiver having an antenna arrangement 1 to detect movements into the space to be monitored. Unlike existing intruder alarms of this type, the antenna arrangement 9, 10 transmits beams in the space corresponding to different spatial volumes, and the circuit architecture provides for a pair of channels 4 to process data corresponding to the different beams. A processor 3 initiates operation of the alarm using the output of both the channels.
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