RECEPTION DEVICE FOR RECEIVING SIGNALS
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United States of America Patent
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Issued Date -
Feb 9, 2023
app pub date -
Aug 5, 2022
filing date -
Aug 5, 2022
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Abstract
A first mixer and a second mixer subject a received signal to quadrature detection by using a local signal. The first mixer and the second mixer subject the received signal subjected to the quadrature detection to frequency conversion so that, of harmonics of a frequency generated by a reference oscillator oscillation, a harmonic having a frequency closest to a frequency of the received signal subjected to the quadrature detection has a predetermined frequency. A first HPF and a second HPF attenuate the predetermined frequency in the received signal subjected to frequency conversion. The first mixer and the second mixer perform frequency conversion so that the frequency of the received signal is 0 Hz. An adjacent channel attenuation filter attenuates an adjacent channel component in the received signal subjected to frequency conversion.
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