Intermodulation read-out principle for passive wireless sensors

Ville Viikari; Heikki Seppä; Kim Dong-Wook

doi:10.1109/TMTT.2011.2108309

Intermodulation read-out principle for passive wireless sensors

Ville Viikari, Heikki Seppä, Kim Dong-Wook

Chungnam National University

Research output: Contribution to journal › Article › Scientific › peer-review

32 Citations (Scopus)

Abstract

This paper presents 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. An analytical expression for the intermodulation response of the sensor is derived and verified by simulations. The concept is demonstrated at 1.2 GHz.

Original language	English
Pages (from-to)	1025-1031
Journal	IEEE Transactions on Microwave Theory and Techniques
Volume	59
Issue number	4
DOIs	https://doi.org/10.1109/TMTT.2011.2108309
Publication status	Published - 2011
MoE publication type	A1 Journal article-refereed

Keywords

Mixers
RF identification (RFID)
wireless sensors

Access to Document

10.1109/TMTT.2011.2108309

https://publications.vtt.fi/julkaisut/muut/2011/Intermodulation_read-out.pdf

Cite this

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Intermodulation read-out principle for passive wireless sensors

Abstract

Keywords

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