Abstract
Wireless power transfer is a key component to creating comfortable and completely wireless MRI receive coil arrays. Here, a WPT system is presented using a Class-E power amplifier driving an array of primary coils with a single secondary coil and Class-E rectifier. An RF MEMs switched adjustable impedance matching system is added to match the variable load presented by the coupled coils to the desired load of the power amplifier. The system is shown to be capable of transferring several watts of power inside the MRI bore.
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