Vector modulator using time delay and phase shifter
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United States of America Patent
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Mar 19, 2013
Grant Date -
Sep 13, 2012
app pub date -
Mar 7, 2011
filing date -
Mar 7, 2011
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An vector modulator using a time delay and a phase shifter is disclosed, the vector modulator including a time delay (110) varying a phase of an input signal by time-delaying the input signal; a first coupler (120) converting the signal outputted in changed phase through the time delay to an I channel signal and a Q channel signal each having a 90° phase difference and outputting the I/Q channel signals; a first phase shifter (130) varying the phase of the I channel signal outputted from the first coupler within a predetermined phase range and outputting the phase-variable I channel signal; a second phase shifter (140) varying the Q channel signal outputted from the first coupler within a predetermined phase range and outputting the phase-variable Q channel signal; and a second coupler (150) coupling phase-variable I/Q channel signals and outputting the coupled signals.
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