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SnO2capacitive sensor integrated with microstrip patch antenna for passive wireless detection of ethylene gas

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5 Author(s)

A capacitive gas sensor using tin oxide (SnO2) nanoparticles has been integrated with a microstrip patch antenna for detecting ethylene gas emanated from climacteric fruits. The decrease in sensor capacitance owing to the presence of ethylene (0-100 ppm) changes the antenna resonant frequency and return loss (by 7 MHz and 9.5 dB) which can be monitored wirelessly.

Published in:

Electronics Letters  (Volume:44 ,  Issue: 7 )