Transmission-reception apparatus and reflected signal suppressing method
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United States of America Patent
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May 29, 2018
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app pub date -
Sep 28, 2016
filing date -
Mar 31, 2014
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Abstract
An amplitude phase parameter calculator in a control unit or circuit in a transmission-reception apparatus calculates an amplitude difference voltage and a phase difference voltage between a transmission detection signal and a reflected detection signal. Adjustment factors including a combination of an amplitude control voltage and a phase control voltage corresponding to a combination of the amplitude difference voltage and the phase difference voltage are discretely stored in an adjustment factor determination table in the control unit. An adjustment factor determiner in the control unit determines the adjustment factors using the combination of the amplitude difference voltage and the phase difference voltage and the adjustment factor determination table. If the adjustment factors do not exist in the adjustment factor determination table, the adjustment factor determiner calculates target adjustment factors using the relationship among the adjustment factors stored in the table, the amplitude difference voltage, and the phase difference voltage.
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