Patent · US Active

RFID systems and methods employing infrared localization

US7696881B2 · kind B2 · utility

3Cited by

12References

21Claims

0Family size

Assignee

RF Code, Inc. · US

Inventors

Steve J. Koerner · Mesa, US
David G. Worthy · Gilbert, US

Key dates

Filing date	Jan 9, 2009
Grant date	Apr 13, 2010
Priority date	—
Expiry date	Jan 9, 2029

Classification

Technology area (CPC G)Physics
CPC primaryG01S2201/01
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A series of radio frequency identification (RFID) systems are delineated. An RFID system comprises an RFID signpost having a transmitter for transmitting signals of a predefined type, and a receiver for receiving signals of the predefined type, wherein the transmitter for transmitting signals of the predefined type cannot transmit until a determination is made that the predefined type of signal is not present at the receiver. Another RFID system comprises an RFID signpost including a transmitter having a continuous power dissipation rating, and a processor for controlling the transmitter such that peak pulse power of a transmission from the transmitter multiplied by its duty cycle does not exceed the continuous power dissipation rating for the transmitter.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.