RF TRANSCEIVER WITH DISTRIBUTED FILTERING TOPOLOGY
First Claim
1. A radio frequency (RF) transceiver having a distributed duplex filtering topology comprising:
- a power amplifier comprising a plurality of RF amplifier stages coupled in cascode and an RF filter coupled between a first one of the plurality of RF amplifier stages and a second one of the plurality of RF amplifier stages, wherein;
each of the plurality of RF amplifier stages is configured to amplify an RF transmission input signal that operates within an RF transmission band of an RF communication band; and
the RF filter has a frequency response that defines a stopband and is tunable to provide the stopband within an RF receive band of the RF communication band; and
a tunable RF duplexer configured to input the RF transmission input signal from the power amplifier, generate an RF transmission output signal that operates within the RF transmission band in response to the RF transmission input signal from the power amplifier, and simultaneously output the RF transmission output signal to an antenna and input an RF receive input signal that operates within the RF receive band from the antenna.
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Accused Products
Abstract
This disclosure includes embodiments of a radio frequency (RF) transceiver having a distributed duplex filtering topology. The RF transceiver includes a power amplifier and a tunable RF duplexer. The tunable RF duplexer is configured to input an RF transmission input signal from the power amplifier, generate an RF transmission output signal that operates within an RF transmission band in response to the RF transmission input signal from the power amplifier, and simultaneously output the RF transmission output signal to an antenna and input an RF receive input signal that operates within an RF receive band from the antenna. The power amplifier includes a plurality of RF amplifier stages coupled in cascode and an RF filter coupled between a first one of the RF amplifier stages and a second one of the RF amplifier stages. Accordingly, the RF filter is configured to provide tuning within the RF receive band.
39 Citations
20 Claims
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1. A radio frequency (RF) transceiver having a distributed duplex filtering topology comprising:
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a power amplifier comprising a plurality of RF amplifier stages coupled in cascode and an RF filter coupled between a first one of the plurality of RF amplifier stages and a second one of the plurality of RF amplifier stages, wherein; each of the plurality of RF amplifier stages is configured to amplify an RF transmission input signal that operates within an RF transmission band of an RF communication band; and the RF filter has a frequency response that defines a stopband and is tunable to provide the stopband within an RF receive band of the RF communication band; and a tunable RF duplexer configured to input the RF transmission input signal from the power amplifier, generate an RF transmission output signal that operates within the RF transmission band in response to the RF transmission input signal from the power amplifier, and simultaneously output the RF transmission output signal to an antenna and input an RF receive input signal that operates within the RF receive band from the antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A radio frequency (RF) transceiver having a distributed duplex filtering topology comprising:
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a tunable RF duplexer configured to input an RF receive input signal that operates within an RF receive band of an RF communication band from an antenna, generate an RF receive output signal that operates within the RF receive band in response to the RF receive input signal from the antenna, and simultaneously output an RF transmission output signal that operates within an RF transmission band of the RF communication band to the antenna and input the RF receive input signal from the antenna; a low noise amplifier (LNA) comprising a linear amplification stage and a tunable high-selectivity bandpass filter, wherein; the linear amplification stage is coupled to receive the RF receive output signal from the tunable RF duplexer, and is configured to amplify the RF receive output signal; and the tunable high-selectivity bandpass filter is tunable to provide a passband within the RF receive band, and is coupled to receive the RF receive output signal after amplification by the linear amplification stage. - View Dependent Claims (17, 18, 19, 20)
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Specification