公开(公告)号：US12155355B2

公开(公告)日：2024-11-26

申请号：US17487688

申请日：2021-09-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Kefeng Han ,  Lei Lu

IPC: H03F3/19 ,  H04B1/40

Abstract: A radio frequency circuit includes an adjustable transformer, a first-stage amplifier, and a second-stage amplifier, the first-stage amplifier is coupled to the second-stage amplifier by using the adjustable transformer, and a bandwidth of the adjustable transformer is adjustable. When the bandwidth of the adjustable transformer is adjusted, an operating frequency band of the radio frequency circuit covers an n258 frequency band and an n257 frequency band, or the n258 frequency band and an n261 frequency band.

公开(公告)号：US20220416835A1

公开(公告)日：2022-12-29

申请号：US17929613

申请日：2022-09-02

Applicant: Huawei Technologies Co., Ltd.

Inventor： Di Li ,  Keji Cui ,  Kefeng Han ,  Lei Lu

IPC: H04B1/48

Abstract: A transceiver includes a package substrate and a die, and a transceiver switch is disposed in the transceiver. The transceiver switch includes an antenna feedpoint, a transmit feedpoint and a receive feedpoint that are coupled to the antenna feedpoint, and a first metal connection line disposed on the package substrate, and the antenna feedpoint and the receive feedpoint are disposed at two ends of the first metal connection line. The transceiver switch further includes a first switch, a transmit pad, and a receive pad that are disposed on the die, a first terminal of the first switch is coupled to the receive pad, a second terminal of the first switch is coupled to a ground terminal of the die, the receive pad is coupled to the receive feedpoint, and the transmit pad is coupled to the transmit feedpoint.

公开(公告)号：US20250014811A1

公开(公告)日：2025-01-09

申请号：US18891106

申请日：2024-09-20

Applicant: Huawei Technologies Co., Ltd.

Inventor： Wanyi Guo ,  Kefeng Han ,  Dongdong Guo

IPC: H01F27/30 ,  H01F38/14

Abstract: A transformer includes a first inductor and a second inductor that are coupled to each other. The first inductor includes a plurality of parallel-connected induction coils. The second inductor includes a plurality of serial-connected induction coils. At least one of the plurality of parallel-connected induction coils and at least one of the plurality of serial-connected induction coils are adjacently disposed in a coupling manner.

公开(公告)号：US20220021353A1

公开(公告)日：2022-01-20

申请号：US17487688

申请日：2021-09-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Kefeng Han ,  Lei Lu

IPC: H03F3/19 ,  H04B1/40

Abstract: A radio frequency circuit includes an adjustable transformer, a first-stage amplifier, and a second-stage amplifier, the first-stage amplifier is coupled to the second-stage amplifier by using the adjustable transformer, and a bandwidth of the adjustable transformer is adjustable. When the bandwidth of the adjustable transformer is adjusted, an operating frequency band of the radio frequency circuit covers an n258 frequency band and an n257 frequency band, or the n258 frequency band and an n261 frequency band.