Wideband Doherty power amplifier
    1.
    发明授权

    公开(公告)号:US12034408B2

    公开(公告)日:2024-07-09

    申请号:US17524756

    申请日:2021-11-12

    摘要: The present invention provides a wideband Doherty power amplifier comprising: a main power amplification device; an auxiliary power amplification device arranged in parallel with the main power amplification device; and a coupled phase compensation network configured for compensating a phase shift between the main power amplification device and the auxiliary power amplification device. The phase compensation network comprising a first transmission line section; a second transmission line section extending substantially collinearly with the first transmission line section; and two pairs of end-connected coupled transmission lines connected in parallel between the first transmission line section and the second transmission line section. The provided Doherty power amplifier demonstrated operation at 6 dB back-off between 1.3-2.3 GHz with efficiency in excess of 41%, which can be used in modern and future wireless communication systems which require power amplifiers operating over a wide frequency range.

    Power amplifier
    5.
    发明授权

    公开(公告)号:US11515840B2

    公开(公告)日:2022-11-29

    申请号:US16897102

    申请日:2020-06-09

    摘要: The present disclosure is to improve the power added efficiency of a power amplifier at high output power. The power amplifier includes: a first capacitor with a radio frequency signal input to one end thereof; a first transistor whose base is connected to the other end of the first capacitor to amplify the radio frequency signal; a bias circuit for supplying bias to the base of the first transistor; and a second capacitor with one end connected to the base of the first transistor and the other end connected to the emitter of the first transistor.

    ELECTRONIC DEVICE COMPRISING AMPLIFIER CIRCUIT FOR PROCESSING WIDEBAND RF SIGNAL

    公开(公告)号:US20220345093A1

    公开(公告)日:2022-10-27

    申请号:US17860467

    申请日:2022-07-08

    摘要: Disclosed is an electronic device comprising: a wireless communication circuit for generating an RF signal, an amplifier circuit electrically connected to the wireless communication circuit and configured to amplify the RF signal, and an antenna connected to the amplifier circuit. The amplifier circuit may comprise: a first amplifier; a second amplifier; a first transmission path connected to an output terminal of the first amplifier and the antenna; a second transmission path connected to an output terminal of the second amplifier and the first transmission path; a first variable impedance circuit located on the first transmission path and configured to change an electrical length of the first transmission path based on the frequency of the RF signal; and a second variable impedance circuit located on the second transmission path and configured to change the electrical length based on a power mode.

    Compact three-way Doherty amplifier module

    公开(公告)号:US11050388B2

    公开(公告)日:2021-06-29

    申请号:US16563728

    申请日:2019-09-06

    申请人: NXP USA, INC.

    摘要: Embodiments of a method and a device are disclosed. In an embodiment, a Doherty amplifier module includes a substrate including a mounting surface, and further includes a first amplifier die, a second amplifier die, and a third amplifier die on the mounting surface. The first amplifier die is configured to amplify a first radio frequency (RF) signal along a first signal path, the second amplifier die is configured to amplify a second RF signal along a second signal path, and the third amplifier die is configured to amplify a third RF signal along a third signal path. A side of the first amplifier die including a first output terminal faces a side of the second amplifier die including a second output terminal. The second signal path is parallel to the first signal path, and the third signal path is orthogonal to the first and second signal paths.

    Method for transforming the impedance of a radio-frequency transmission line of a printed circuit and printed circuit thereof

    公开(公告)号:US11019720B2

    公开(公告)日:2021-05-25

    申请号:US16669076

    申请日:2019-10-30

    申请人: GatesAir, Inc.

    IPC分类号: H03F1/07 H05K1/02 H03F1/02

    摘要: A method for transforming the impedance of a radio-frequency transmission line of a printed circuit from a first impedance value to a second impedance value, the radio-frequency transmission line being adapted to transport a radio-frequency signal at a frequency value comprised in a frequency range defined between a minimum frequency value and a maximum frequency value, wherein the following steps are envisaged:—dividing the radio-frequency transmission line into a plurality of circuit sections each one of the circuit sections including a first and a second impedance connected in parallel with each other by two circuit branches placed at a maximum distance (dmax) from each other, wherein the circuit sections have respective third impedance values that gradually increase, respectively decrease, from the first impedance value to the second impedance value;—determining the maximum distance between the circuit branches in such a way as to avoid any undesired frequency values within the frequency range;—setting a fourth impedance value of one of the two impedances;—calculating a fifth impedance value of the other one of the two impedances, such that the impedance value of the circuit section is the third respective impedance value.

    Doherty radio frequency amplifier circuitry

    公开(公告)号:US10978999B2

    公开(公告)日:2021-04-13

    申请号:US16436252

    申请日:2019-06-10

    申请人: Qorvo US, Inc.

    摘要: Doherty radio frequency (RF) amplifier circuitry includes an input node, an output node, a main amplifier path, and a peaking amplifier path. The main amplifier path is coupled between the input node and the output node and includes a main amplifier. The peaking amplifier path is coupled in parallel with the main amplifier path between the input node and the output node, and includes a peaking amplifier and a peaking variable gain preamplifier between the input node and the peaking amplifier. The peaking variable gain preamplifier is configured to adjust a current provided to the peaking amplifier.