IEICE Electronics Express
Online ISSN : 1349-2543
LETTER
RFID antenna humidity sensor co-design for USN applications
Yasar AminYi FengQiang ChenLi-Rong ZhengHannu Tenhunen
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JOURNALS FREE ACCESS

2013 Volume 10 Issue 4 Pages 20130003

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Abstract

We demonstrate for the first time an RFID tag antenna which itself is humidity sensor and also provides calibration functionality. The antenna is comprised of T-matching network and horizontally meandered lines for impedance matching and reliable near-field communication. The novel contour design provides humidity sensing, and calibration functions whilst concurrently acts as a radiating element along with quadrangular capacitive tip-loading with covered middle portion for far-field communication. The inkjet printed prototypes of the antenna provide effective ambient humidity sensing while demonstrating stable RFID communication. The antenna has a compact size of 1.1 × 10.2cm for 902-928MHz band.

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© 2013 by The Institute of Electronics, Information and Communication Engineers
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