%0 Journal Article
%A Escobedo, Pablo
%A Carvajal, Miguel A
%A Capitán-Vallvey, Luis F
%A Fernández-Salmerón, José
%A Martínez-Olmos, Antonio
%A Palma, Alberto J
%T Passive UHF RFID Tag for Multispectral Assessment.
%D 2016
%U https://hdl.handle.net/10668/26352
%X This work presents the design, fabrication, and characterization of a passive printed radiofrequency identification tag in the ultra-high-frequency band with multiple optical sensing capabilities. This tag includes five photodiodes to cover a wide spectral range from near-infrared to visible and ultraviolet spectral regions. The tag antenna and circuit connections have been screen-printed on a flexible polymeric substrate. An ultra-low-power microcontroller-based switch has been included to measure the five magnitudes issuing from the optical sensors, providing a spectral fingerprint of the incident electromagnetic radiation from ultraviolet to infrared, without requiring energy from a battery. The normalization procedure has been designed applying illuminants, and the entire system was tested by measuring cards from a colour chart and sensing fruit ripening.
%K microcontroller
%K optical sensor
%K passive RFID tag
%K printed electronics
%K screen printing
%K spectral fingerprint
%~