Mike J Thomas

US Patent:

20080266098, Oct 30, 2008

Filed:

Mar 26, 2008

Appl. No.:

12/056120

Inventors:

Ali Aiouaz - Mission Viejo CA, US
Christopher J. Diorio - Shoreline WA, US
Aanand Esterberg - Seattle WA, US
Harsh Jain - Irvine CA, US
Omar Khwaja - Irvine CA, US
David Ord - Aliso Viejo CA, US
Mike Thomas - Wake Forest NC, US

Assignee:

Impinj, Inc. - Seattle WA

International Classification:

H04B 7/00

US Classification:

3405721

Abstract:

Radio Frequency IDentification (RFID) reader system, software, and methods are provided, such that an operational processing block for the RFID reader to communicate with an RFID tag uses a RF spectrum portion subdivided into a set of channels. The communication takes place in the presence of a foreign device that uses a subset of first channels of the RF spectrum and does not use a subset of second channels of the spectrum. The methods cause a radiating power directed towards the tag to be reduced and a radiating dwell time to be changed. This is to assure that co-existing systems can operate without compromising their functionality and operational quality. In some embodiments, the radiating power is reduced to zero.