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该论文提出了一种自调谐的谐振感应链路发射驱动器,采用正交对称相位切换分数电容技术,旨在解决无线功率传输中发射端效率低和驱动电压高的问题,通过动态调谐实现高Q天线下的低电压驱动和高效能量传输。
University of Southampton, Southampton, United Kingdom Inductive coupling for power transfer is increasingly popular in many applications such as RFID and wireless charging. While much recent work has focussed on receivers [1,2], less consideration has been given to the transmit function. HighQ antenna circuits are beneficial for several reasons. Activation of a link at a distance requires a large magnetic field from the transmitter, so for a given antenna current, lower driver voltages may be used, simplifying the driver and its power supplies, and improving overall efficiency. Further, the inherent filtering allows a high-efficiency switching driver to be used while reducing harmonics in the current. However, the consequent narrow bandwidth requires precise tuning to resonance. The excitation frequency may be varied in some applications, but this transfers the tuning problem to the receiver. Any transmit tuning circuitry
Henry Kennedy, Rares Bodnar, Teerasak Lee, William Redman-White