Low-Loss Compact Transmit Impedance Match Tuning Technique
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United States of America Patent
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Mar 10, 2017
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Apr 22, 2016
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Abstract
An adaptive impedance matching network to implement an impedance match between an RF power device and an antenna comprises a matching network having at least one tunable component, a current sensor providing a current value corresponding to the supply current associated with the RF power device, a power sensor configured to provide an RF power sensor value monotonically related to power delivered to the antenna, and a tuner to provide a tuning signal to the matching network as a function of the current and RF power values. The tuner may adjust the tuning signal so that the RF power sensor value is at least as large as for other settings of the tuning signal, while maintaining the supply current at a predetermined amount corresponding to an amount of supply current occurring when the RF power device is driving a load that produces the desired RF output power and amplifier efficiency.
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