Figure 9

Devices used for experiments: (a) Transmitting devices: Velleman Handheld RF Generator for freq\(<1 \,\hbox {MHz}\), signal generator built using a Tiva C Launchpad Board for freq 1MHz–20MHz and RF Explorer Handheld RF generator for freq\(>24 \,\hbox {MHz}\). (b) RF Explorer Handheld spectrum analyzer used as a receiving device, and a high-frequency buffer used for high impedance/capacitive load measurements. (c) Couplers used to connect the transmitter and receiver devices to body.