Fig. 3
From: A battery-free wireless sensor for encrypted signal transmission via Maxwell’s displacement current
Wireless sensing performance of the ID-TENG a Electrical model of the ID-TENG with series Ls and parallel Cp. b Time-domain diagram and c frequency-domain diagram of the wireless signals with different series inductances. d Relationship between the base frequency and series inductors. e Time-domain diagram and f frequency-domain diagram of the wireless signals with different numbers of parallel capacitances. g Wireless signal can be detected at a distance of more than 22 m. h Relationship between the peak-to-peak voltage of the received signal and the distance between the transmitter and receiver. The inset is a frequency-domain diagram of the wireless signals at different transmission distances. i 3D time-domain diagram of the wireless signals at different transmission distances
