Wireless Chipless System for Humidity Sensing
MetadataShow full item record
Subjectresonance frequency; reader; inductive coupling; flexible substrate; Printed electronics; Inkjet printing
This work describes a fully wireless sensory system where a chipless strategy is followed in the sensor part. Alternatively, to characterize only the sensing element, we present the response of the reader antenna when the sensing element is placed in its vicinity: changes in the parameter of interest are seen by the reader through inductive coupling, varying its frequency response. The sensing part consists of a LC circuit manufactured by printing techniques on a flexible substrate, whose electrical permittivity shows dependence with the moisture content. The measurement distance show significant differences in the frequency response: a change of 700 kHz is observed when the measurement is performed directly on the wireless chipless sensor between 20% and 80%RH, while this variation in frequency is reduced more than three times when measuring at the reader antenna with 5 mm distance between elements. Furthermore, we demonstrate the importance of the separation between reader and sensor to get a reliable measuring system.
Showing items related by title, author, creator and subject.
Towards 3D-printed organic electronics: Planarization and spray-deposition of functional layers onto 3D-printed objects Falco A; Petrelli M; Bezzeccheri E; Abdelhalim A; Lugli P (Elsevier B.V., 2016)The last years have seen a surge in the interest for “smart objects” obtained with the integration of electronics and custom designed structures. One of the possible approaches for the fabrication of such devices is 3D ...
Weiler B; Bareiss M; Kalblein D; Zschieschang U; Klauk H; Scarpa G; Fabel B; Porod W; Lugli P (IEEE, 2012)Nano diodes show great potential for applications in detectors, communications and energy harvesting. However, to make them suitable for low-cost mass production, these nano devices have to be fabricated reliably over large ...
Pathak A; Bora A; Tornow M; Haeberle T; Lugli P; Schwartz J (Institute of Electrical and Electronics Engineers Inc., 2016)The successful transfer printing of thin metal films onto monolayers of aliphatic bisphosphonic acids (bisPAs) is reported. These monolayers were prepared from solution on plasma-grown aluminum oxide, and were compared ...