Abstract
This letter proposes a planar capacitive power transmitter (Tx) and differential power receiver (Rx) for cavity resonance-enabled wireless power transfer. The power Tx consists of an inverted L-shaped open stub. The power Rx consists of two inverted L-shaped open stubs based on method of image, and a differential output can be obtained by it. Our power Tx and Rx are explained by the equivalent circuits and are designed through electromagnetic simulation. From the measurement results at multiple positions, it was revealed that the higher RF-dc efficiency was achieved at all positions than the conventional monopole probes.
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