Non-linear resonating sensor and a method

Mark Allen (Inventor), Ville Viikari (Inventor), Timo Varpula (Inventor), Tomi Mattila (Inventor), Ari Alastalo (Inventor), Heikki Seppä (Inventor)

Research output: PatentPatent


Described herein is a passive wireless resonating non-linear sensor that is typically based on a ferroelectric varactor. The sensor replies its data at an intermodulation frequency when a reader device illuminates it at two closely-located frequencies. Furthermore, described herein is a general intermodulation read-out principle for passive wireless sensors. A sensor utilizes a mixing element, such as a varactor and it can be equipped with a capacitive, inductive, or resistive sensor element. When the sensor is illuminated with signals with two frequencies it replies the sensor data at an intermodulation frequency.

Patent family as of 16.9.2021
CN102859889 A 20130102 CN201180017693 20110329      
EP2553821 A1 20130206 EP20110762074 20110329      
FI20105330 A0 20100331 FI20100005330 20100331      
JP2013528966 T2 20130711 JP20130501880T 20110329      
US2012235847 AA 20120920 US20120433315 20120329      
US9476975 BB 20161025 US20120433315 20120329      
WO11121180 A1 20111006 WO2011FI50263 20110329

Link to current patent family on right 

Original languageEnglish
Patent numberUS2012235847
IPCH01Q 15/ 00 A I
Priority date29/03/12
Publication statusPublished - 20 Sept 2012
MoE publication typeH1 Granted patent


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