Dedicated Class-E Driver for Large Area Wireless Medical Inspection Capsules

With a body-size clinical setup in mind providing power to wireless and batteryless medical inspection capsules, a dedicated Class-E driver was designed, simulated and tested. With a supply of 50 V, a Vds of 500 V is generated driving a current through a 147 μH Helmholtz coil, thereby generating an alternating magnetic field at 1 MHz, sufficiently strong to drive a self propelled gastrointestinal inspection capsule. The volume in which capsule operation is guaranteed, is boosted (by a factor of 20 compared to previous work) to 0.18 m3, covering the complete upper body.