Calibration of Passive UHF RFID Tags Using Neural Networks to Measure Soil Moisture

Figure 4

(a) Typical UHF RFID tag compared to a Brazilian R$1.00 coin. (b) UHF RFID tag model BJTW01, based on the RFID chip Alien Higgs 3, which is the model used in the experiments presented in this work.

(a)

(b)