Skyworks Solutions, Inc.

Jin Hoon Cho

Anand Raghavan

David Richard Pehlke

Aleksey A Lyalin

Lup Meng Loh

Srivatsan Jayaraman

Lige Wang

Sung-Jin Park

Seung Hoon Sung

Min Hwan Kim

J Gary Eden

Radio frequency front-end systems with filter reuse. In certain embodiments, a front-end system includes a filter, a low noise amplifier (LNA), and a switch interposed between the filter and an input to the LNA. In a first state of the switch, the filter serves to filter a radio frequency signal that is amplified by the LNA. The front-end system further includes a power amplifier that is coupled to the switch. Additionally, in a second state of the switch, the filter serves to filter an amplified radio frequency transmit signal provided by the power amplifier. Accordingly, a filter along a receive path of the front-end system is reused for transmit.

Filter reuse in radio frequency front-ends

The radio frequency front-end systems herein include modules having bandwidth controllable components, such as amplifier and filters. By implementing the modules with bandwidth control, the same module can be used for operation of multiple frequency bands including a first frequency band and a second frequency band. Thus, when implementing features such as carrier aggregation, multiple-input multiple-output (MIMO), and/or sounding resource signaling (SRS) for supporting the multiple frequency bands, the total number of modules used can be reduced and/or additional feature support can be provided compared to an implementation in which each module supports a single frequency band.

Broadband architectures for radio frequency front-ends

Aspects of the disclosure provide a front-end module for a wireless device comprising at least one transmit path configured to provide a first sounding reference signal, at least one transmit/receive path coupled to at least one antenna port, a sounding-reference-signal port configured to provide the first sounding reference signal and to receive a second sounding reference signal, an antenna switching module coupled between the at least one transmit path, the at least one transmit/receive path, and the sounding-reference-signal port, the antenna switching module being configured to provide the first sounding reference signal from the transmit path to the at least one transmit/receive path and the sounding-reference-signal port and to provide the second sounding reference signal received at the sounding-reference-signal port to the at least one transmit/receive path.

Unified sounding reference signal input/output functionality

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Newbury Park, CA, United States of America

Jin Hoon Cho