PHASE SHIFTER
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United States of America
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Issued Date -
Mar 10, 2022
app pub date -
May 7, 2019
filing date -
May 7, 2019
priority date (Note) -
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Abstract
First and second paths (I,II) are connected in parallel between an input terminal (IN) and an output terminal (OUT). A high-pass filter (HPF) is provided in the first path (I). A low-pass filter (LPF) is provided in the second path (II). A switch (SW1-SW4) connects one of the high-pass filter (HPF) and the low-pass filter (LPF) to the input terminal (IN) and the output terminal (OUT) and disconnects the other. A transmission line (TL1,TL2) is provided on the first and second paths (I,II) respectively. A line length of the transmission line (TL1,TL2) is adjusted such that a resonance caused due to circuit constants of the high-pass filter (HPF) and the low-pass filter (LPF) and capacitance obtained when the switch (SW1-SW4) is OFF is shifted to a communication frequency band.
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