Skyworks Solutions, Inc.

Tianming Chen

David Richard Pehlke

Stephane Richard Marie Wloczysiak

Joel Richard King

Anand Raghavan

Shayan Farahvash

Russ Alan Reisner

Jiunn-Sheng Guo

Nathan Lucas Nuzum

Shihan Qin

Xiaoqiang Li

Nobuyuki Tsujimoto

Front end architectures are described that tailor duplexer characteristics to enable the removal of many of the impedance matching components typically included in a receive signal path between an antenna and receive amplifiers and in a transmit signal path between transmit amplifiers and the antenna. By tailoring duplexer characteristics, targeted impedance matching can be achieved for front end architectures.

Reducing impedance matching components in front end architectures for multi-band transmit and receive functions

The disclosed front end architectures are configured to conglomerate duplexer transmission (TX) contours into a specific or targeted region. This enables the power amplifier (PA) to match a larger number of frequency bands without the help of additional matching networks. The disclosed architectures are advantageous because they reduce the number of components (e.g., surface mount technology components (SMTs)) required for radio-frequency (RF) modules, such as front end modules, power amplifier modules, and the like. The disclosed architectures are also advantageous because they improve performance of the modules across a wider range of frequency bands.

Conglomerating transmission contours to improve transmission performance for radio-frequency communications

Examples of the disclosure include a wireless device comprising a power amplifier configured to output a balanced amplified signal, an antenna configured to transmit and receive signals, a balun coupled to the power amplifier and the antenna, and being configured to receive the balanced amplified signal and output, based on the balanced amplified signal, an unbalanced amplified signal to the antenna, and at least one capacitor coupled in series between the power amplifier and the balun.

Biasing solution for push-pull power amplifier for low loadline and high common mode rejection ratio background

Radio frequency front end modules are provided. In one aspect, a front end system includes at least one power amplifier configured to amplify a transmit radio frequency signal, at least one low noise amplifier configured to receive a receive radio frequency signal, an output node coupled to an antenna. The front end system also includes a first switch configured to selectively couple the output node to the at least one power amplifier during a transmit period and to the at least one low noise amplifier during a receive period, at least one transmit filter coupled between the power amplifier and the at least one switch, and at least one receive filter coupled between the low noise amplifier and the at least one switch. The front end system further includes a transmit supplemental filter, a receive supplemental filter, and a second switch.

Radio frequency front end module including supplemental filter

Radio frequency front end modules are provided. In one aspect, a front end system includes at least one power amplifier configured to amplify a transmit radio frequency signal, at least one low noise amplifier configured to receive a receive radio frequency signal, an output node coupled to an antenna. The front end system further includes at least one switch configured to selectively couple the output node to the at least one power amplifier during a transmit period and to the at least one low noise amplifier during a receive period, at least one transmit filter coupled between the power amplifier and the at least one switch, and at least one receive filter coupled between the low noise amplifier and the at least one switch.

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Newbury Park, CA, United States of America

Tianming Chen