Wireless communication system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Aug 5, 2008
Grant Date -
Mar 10, 2005
app pub date -
Sep 6, 2002
filing date -
Sep 13, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An RFID tag (200) and similar control/sensing unit (300) for a communications system are described. The control/sensing unit has a control element (301) having one or more states, and include an antenna (207) as well as an electrical circuit (201-206) generating a pulse control signal for controlling transmission from the antenna and varying a parameter of the pulse control signal in dependence on the state of the control element (301). Also disclosed is a receiving communication unit in the form of a base unit or system controller for such a communications system, the unit including a receiver (100) for receiving a pulsed RF signal and an electrical circuit (105-106) for detecting a parameter of the pulsed RF signal. An output circuit (107) then produces an output control signal dependent on the detected parameter of the pulsed RF signal.
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