Phase shifters, interrogators, methods of shifting a phase angle of a signal, and methods of operating an interrogator
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United States of America Patent
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Aug 5, 2003
Grant Date -
N/A
app pub date -
Mar 9, 1999
filing date -
Mar 9, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention includes phase shifters, interrogators, methods of shifting a phase angle of a signal, and methods of operating an interrogator. One aspect of the present invention provides a phase shifter including a first power divider configured to receive a signal and provide plural quadrature components of the signal; plural mixers coupled with the first power divider and configured to scale the quadrature components using a phase shift angle; and a second power divider coupled with the mixers and configured to combine the scaled quadrature components to shift the phase angle of the input signal by the phase shift angle.
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