T. Bjorninen, E. Moradi, L. Sydanheimo, J. Carmena, J. Rabaey, L. Ukkonen
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Electromagnetic modelling and measurement of antennas for wireless brain-machine interface systems
We analyze the power and voltage transfer in a wireless link from an on-body transmit antenna to 1×1×1 mm3 antenna in a cortical implant to provide power and data telemetry for a battery-free brain-machine interface microelectronic system. We compare the wireless link performance with regular, segmented, and tilted transmit loop antennas. Moreover, we analyze the performance improvement achieved by inserting a magneto-dielectric core in the implant antenna. We also attest the simulation model through measurements in a liquid head phantom.
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