CN-224218368-U - Power amplifier

CN224218368UCN 224218368 UCN224218368 UCN 224218368UCN-224218368-U

Abstract

The utility model discloses a power amplifier, wherein a primary amplifying circuit is arranged in a first sinking type groove, an input external matching circuit of a secondary amplifying circuit is arranged on an input cover plate, an input internal matching circuit of the secondary amplifying circuit and the secondary amplifying circuit are arranged on an embedded heat sink, an output matching circuit of the secondary amplifying circuit is arranged in a second sinking type groove, the embedded heat sink is separated between the first sinking type groove and the second sinking type groove, based on the fact, the distance between the circuits in the first sinking type groove and the second sinking type groove is far, the degree of mutual interference is small, an isolation circuit is not required to be additionally arranged, in addition, part of circuits are arranged on an input cover plate, the input cover plate is arranged on the first sinking type groove, and an output cover plate is arranged on the second sinking type groove.

Inventors

Ruan Dehong
WANG YINAN
LIU SHITOU

Assignees

深圳市时代速信科技有限公司
深圳麦克韦尔科技有限公司

Dates

Publication Date: 20260508
Application Date: 20250422

Claims (10)

1. The power amplifier is characterized by comprising a primary amplifying circuit, a secondary amplifying circuit, an input internal matching circuit of the secondary amplifying circuit, an input external matching circuit of the secondary amplifying circuit, an output matching circuit of the secondary amplifying circuit, a cavity substrate, an input cover plate and an output cover plate; The cavity substrate comprises a first sunken groove and a second sunken groove, and the first sunken groove and the second sunken groove are separated by an embedded heat sink; The first-stage amplifying circuit is arranged in the first sinking type groove, the input external matching circuit of the second-stage amplifying circuit is arranged on the input cover plate, the input internal matching circuit of the second-stage amplifying circuit and the second-stage amplifying circuit are arranged on the embedded heat sink, and the output matching circuit of the second-stage amplifying circuit is arranged in the second sinking type groove; the primary amplifying circuit, the input external matching circuit of the secondary amplifying circuit, the input internal matching circuit of the secondary amplifying circuit, the secondary amplifying circuit and the output matching circuit of the secondary amplifying circuit are sequentially connected.
2. The power amplifier of claim 1, further comprising an input bias circuit of the secondary amplifying circuit and an output bias circuit of the secondary amplifying circuit; The input bias circuit of the secondary amplifying circuit is arranged on the input cover plate and is connected with the secondary amplifying circuit and used for providing a first bias voltage for the secondary amplifying circuit; The output bias circuit of the secondary amplifying circuit is arranged on the output cover plate, and the output bias circuit of the secondary amplifying circuit is connected with the secondary amplifying circuit and is used for providing a second bias voltage for the secondary amplifying circuit.
3. The power amplifier of claim 1, further comprising an output detection circuit; The output detection circuit is arranged on the output cover plate and is connected with the output matching circuit of the secondary amplifying circuit.
4. The power amplifier of claim 3, further comprising a coupler; The coupler is arranged on the output cover plate and connected between the output matching circuit of the secondary amplifying circuit and the output detection circuit.
5. The power amplifier of claim 1 wherein the cavity substrate is an organic package substrate.
6. The power amplifier of claim 1, further comprising an encapsulation cover; the packaging cover plate and the edge of the cavity substrate form detachable connection or sealing connection, and the packaging cover plate and the cavity substrate are the shell of the power amplifier.
7. The power amplifier of claim 6, wherein the package cover is plastic.
8. The power amplifier of claim 1, wherein the bottom material of the input cover plate and the bottom material of the output cover plate are both copper plating.
9. The power amplifier of claim 8, wherein the edge of the input cover plate is welded to the open edge of the first sink recess, and wherein the edge of the output cover plate is welded to the open edge of the second sink recess.
10. The power amplifier of any of claims 1-9, wherein the surface material of the second countersink is a ceramic dielectric.

Description

Power amplifier Technical Field The utility model relates to the field of signal isolation, in particular to a power amplifier. Background In the prior art, the power amplifier is generally integrated in a PCB (Printed Circuit Board ) board, that is, each device in the power amplifier is tiled on a PCB board, and an additional isolation circuit is required between different devices, so that the area of the PCB board where the power amplifier is located is large, and when the power amplifier is put into use, a large horizontal space or a large vertical space is required to be additionally provided for the power amplifier, which means that if the size of the use scene of the power amplifier is small, the power amplifier cannot be installed and used, and the application scene of the power amplifier is limited. Disclosure of utility model The utility model aims to provide a power amplifier, wherein a primary amplifying circuit is arranged in a first sinking type groove, an input external matching circuit of a secondary amplifying circuit is arranged on an input cover plate, an input internal matching circuit of the secondary amplifying circuit and the secondary amplifying circuit are arranged on an embedded heat sink, an output matching circuit of the secondary amplifying circuit is arranged in a second sinking type groove, the embedded heat sink is separated between the first sinking type groove and the second sinking type groove, based on the fact, the circuit distances between the first sinking type groove and the second sinking type groove are far, the interference degree is small, an additional isolating circuit is not needed, in addition, part of circuits are arranged on an input cover plate, the input cover plate is arranged on the first sinking type groove, and an output cover plate is arranged on the second sinking type groove, so that the circuits are not all tiled on the same horizontal plane, but are distributed in the vertical direction, the horizontal area of the whole power amplifier is saved, and the installation and the use of the power amplifier are facilitated. In order to solve the technical problems, the utility model provides a power amplifier which comprises a primary amplifying circuit, a secondary amplifying circuit, an input internal matching circuit of the secondary amplifying circuit, an input external matching circuit of the secondary amplifying circuit, an output matching circuit of the secondary amplifying circuit, a cavity substrate, an input cover plate and an output cover plate; The cavity substrate comprises a first sunken groove and a second sunken groove, and the first sunken groove and the second sunken groove are separated by an embedded heat sink; The first-stage amplifying circuit is arranged in the first sinking type groove, the input external matching circuit of the second-stage amplifying circuit is arranged on the input cover plate, the input internal matching circuit of the second-stage amplifying circuit and the second-stage amplifying circuit are arranged on the embedded heat sink, and the output matching circuit of the second-stage amplifying circuit is arranged in the second sinking type groove; the primary amplifying circuit, the input external matching circuit of the secondary amplifying circuit, the input internal matching circuit of the secondary amplifying circuit, the secondary amplifying circuit and the output matching circuit of the secondary amplifying circuit are sequentially connected. Preferably, the circuit further comprises an input bias circuit of the secondary amplifying circuit and an output bias circuit of the secondary amplifying circuit; The input bias circuit of the secondary amplifying circuit is arranged on the input cover plate and is connected with the secondary amplifying circuit and used for providing a first bias voltage for the secondary amplifying circuit; The output bias circuit of the secondary amplifying circuit is arranged on the output cover plate, and the output bias circuit of the secondary amplifying circuit is connected with the secondary amplifying circuit and is used for providing a second bias voltage for the secondary amplifying circuit. Preferably, the detector further comprises an output detection circuit; The output detection circuit is arranged on the output cover plate and is connected with the output matching circuit of the secondary amplifying circuit. Preferably, the device further comprises a coupler; The coupler is arranged on the output cover plate and connected between the output matching circuit of the secondary amplifying circuit and the output detection circuit. Preferably, the cavity substrate is an organic package substrate. Preferably, the packaging cover plate is further included; the packaging cover plate and the edge of the cavity substrate form detachable connection or sealing connection, and the packaging cover plate and the cavity substrate are the shell of the power amplifier. Preferably, the ma