Transmission module
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United States of America Patent
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Sep 29, 2015
Grant Date -
Apr 2, 2015
app pub date -
Dec 5, 2014
filing date -
Jul 19, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
As a capacitor Cj is connected in parallel to a non-reciprocal circuit 3, in a predetermined frequency band in which a power amplifier 2 is used, or in other words, in a predetermined frequency band used in communication, an input impedance of the non-reciprocal circuit 3 is adjusted and the length of an impedance curve (reflection coefficient S11) at an input terminal P2 of the non-reciprocal circuit 3 can thus be reduced. In addition, an output impedance of the power amplifier 2 and an input impedance of the non-reciprocal circuit 3 can be matched in a broad band through an interstage matching circuit 7 (input matching circuit 6) provided between an output terminal P1 of the power amplifier 2 and the input terminal P2 of the non-reciprocal circuit 3.
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