System and method for a radio frequency filter
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United States of America Patent
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Feb 8, 2022
Grant Date -
Jun 13, 2019
app pub date -
Dec 5, 2018
filing date -
Dec 7, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
In accordance with an embodiment, an RF system includes a transmit path having a first tunable transmit band stop filter, and a power amplifier coupled to an output of the first tunable transmit band stop filter, where the first tunable transmit band stop filter is configured reject a receive frequency and pass a transmit frequency; a receive path comprising an LNA; and a duplex filter having a transmit path port coupled to an output of the power amplifier, a receive path port coupled to an input of the LNA, and an antenna port, where the duplex filter is configured to pass the transmit frequency and reject the receive frequency between the antenna port and the transmit path port, pass the receive frequency and reject the transmit frequency between the antenna port and the receive path port.
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