Two novel techniques for enhancing powering and control of multiple inductively-powered biomedical implants

Two techniques are presented that are expected to greatly enhance wireless data collection from high-bandwidth biosensors. By steering the aggregate magnetic field from a (near-) orthogonal set of AC-energized coils, selected sensor implants can be powered and communicated with. Communication with individual implants can also be enhanced through half-cycle amplitude modulation. This technique allows bit rates of up to twice the energizing frequency. Initial results and future investigations are discussed.