公开(公告)号：US20220200576A1

公开(公告)日：2022-06-23

申请号：US17467494

申请日：2021-09-07

Applicant: QUALCOMM INCORPORATED

Inventor： Kai ZHAN ,  Chinmaya MISHRA

IPC: H03H11/04 ,  H03F3/24 ,  H04B1/04

Abstract: A dual mode notch filter for use in a multi-band millimeter wave (mmW) transmitter includes a transmit filter circuit disposed between two amplifiers in a mmW transmit signal path, the transmit filter circuit formed by at least one switch, at least one capacitor, and a double-tuned transformer, the transmit filter circuit having at least two modes configured to selectively filter a spurious signal in at least a first communication band.

公开(公告)号：US20250096754A1

公开(公告)日：2025-03-20

申请号：US18471088

申请日：2023-09-20

Applicant: QUALCOMM Incorporated

Inventor： Chuan WANG ,  Kai ZHAN ,  Bon-Hyun KU ,  Hyejeong SONG ,  Li LIU ,  Kevin Hsi-Huai WANG ,  Muhammad HASSAN

IPC: H03F3/24 ,  H04B1/40

Abstract: An apparatus for wireless communications includes a power amplifier, a low-noise amplifier, a power detector, and a transformer. The transformer includes a first inductor coupled to an output of the power amplifier, and a second inductor coupled to an antenna, wherein the second inductor is magnetically coupled with the first inductor. The transformer also includes a third inductor coupled to an input of the low-noise amplifier, wherein the third inductor is magnetically coupled with the second inductor. The transformer also includes a coupling inductor coupled to an input of the power detector, wherein the coupling inductor is magnetically coupled with at least one of the first inductor and the second inductor.