Fig. 2: Characterization of the antenna design and electrical device properties. | Nature Communications

Fig. 2: Characterization of the antenna design and electrical device properties.

From: Fully implanted battery-free high power platform for chronic spinal and muscular functional electrical stimulation

Fig. 2

a Rendering of treadmill cage design with a dual loop transmitter antenna and infrared receivers. b Rendering of co-planar resonant antenna design showing the transmitter and receiver antenna coupling in Finite Element simulations of electromagnetic field flux. c Corresponding power vs. load curve in the center of 56 cm × 16 cm arena with RF input power of 2 W for the 3-coil WPT and 2-coil WPT. d Power harvesting capability vs. angular misalignments for both 2 W and 5 W of RF power. e Finite element simulations and measurements (displayed in numeric datapoint representing the hottest location measured) at steady state in saline solution when powered with 6 W of RF power.

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