CN209767485U - Power amplifier - Google Patents
Power amplifier Download PDFInfo
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- CN209767485U CN209767485U CN201920282641.9U CN201920282641U CN209767485U CN 209767485 U CN209767485 U CN 209767485U CN 201920282641 U CN201920282641 U CN 201920282641U CN 209767485 U CN209767485 U CN 209767485U
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Abstract
The utility model discloses a power amplifier, which comprises a shell and a power amplifying circuit in the shell; the power amplification circuit comprises an input port, an output port, an input matching circuit, an output matching circuit, a power amplifier tube, a grid bias circuit, a drain bias circuit and a power supply; the input port is connected with the input matching circuit, the input matching circuit is connected with the grid bias circuit, the grid bias circuit is connected with the grid of the power amplifying tube, the source electrode of the power amplifying tube is grounded, the drain electrode of the power amplifying tube is connected with the drain bias circuit, the drain bias circuit is connected with the output matching circuit, the output matching circuit is connected with the output port, and the power supply is respectively connected with the grid bias circuit and the drain bias circuit. The utility model has the advantages of light in weight, small, efficient, wide bandwidth, high gain, high output power, good heat dissipation, high stability and sealing process.
Description
Technical Field
The utility model relates to a signal amplification field especially relates to a power amplifier.
Background
The task of the power amplifier is to amplify a weak signal from a signal source to obtain a stronger signal, which is one of important components in a radio system, and most of the existing power amplifiers cannot have the advantages of flexible design, low cost, good consistency, good stability and small volume.
Disclosure of Invention
An object of the utility model is to overcome prior art's shortcoming, provide a power amplifier, with the signal from the input of radio frequency port RFin, amplify through the power tube, from the power signal of radio frequency port RFout output amplification, have light in weight, small, efficient, bandwidth width, gain height, output power height, good heat dissipation, stability height, adopt the advantage of sealed technology.
The purpose of the utility model is realized through the following technical scheme: a power amplifier includes a housing and a power amplifying circuit within the housing; the power amplification circuit comprises an input port, an output port, an input matching circuit, an output matching circuit, a power amplifier tube, a grid bias circuit, a drain bias circuit and a power supply; the input port is connected with the input matching circuit, the input matching circuit is connected with the grid bias circuit, the grid bias circuit is connected with the grid of the power amplifying tube, the source electrode of the power amplifying tube is grounded, the drain electrode of the power amplifying tube is connected with the drain bias circuit, the drain bias circuit is connected with the output matching circuit, the output matching circuit is connected with the output port, and the power supply is respectively connected with the grid bias circuit and the drain bias circuit.
Further, the gate bias circuit comprises a first filter circuit, a second filter circuit, a resistor R6, a resistor R7, a diode D1, a diode D2 and an inductor L1; one end of the resistor R7 is connected with a power supply, the other end of the resistor R7 is connected with the cathode of the diode D1 and one end of the resistor R8 respectively, the anode of the diode D1 is grounded, the other end of the resistor R8 is connected with the first filter circuit and one end of the inductor L1, and the other end of the inductor L1 is connected with the second filter circuit and the grid of the power amplifying tube.
Furthermore, the first filter circuit is formed by connecting two capacitors in parallel to the ground.
Furthermore, the second filter circuit is formed by connecting two parallel resistors with a capacitor in series, and the other end of the capacitor is grounded.
Further, the drain bias circuit comprises an inductor L2 and a second filter circuit; and one end of the inductor L2 is connected with the drain electrode of the power amplifying tube, and the other end of the inductor L2 is connected with the third filter circuit and the power supply.
Furthermore, the third filter circuit is formed by connecting two capacitors in parallel to ground.
The utility model has the advantages that: the power amplifier has the advantages of light weight, small size, high efficiency, wide bandwidth, high gain, high output power, good heat dissipation performance, high stability and adoption of a sealing process.
Drawings
FIG. 1 is a circuit diagram of the present invention;
Fig. 2 is a circuit diagram of a power amplifier circuit.
Detailed Description
The technical solution of the present invention is described in further detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description.
As shown in fig. 1, a power amplifier includes a housing and a power amplifying circuit within the housing; the power amplification circuit comprises an input port, an output port, an input matching circuit, an output matching circuit, a power amplifier tube, a grid bias circuit, a drain bias circuit and a power supply; the input port is connected with the input matching circuit, the input matching circuit is connected with the grid bias circuit, the grid bias circuit is connected with the grid of the power amplifying tube, the source electrode of the power amplifying tube is grounded, the drain electrode of the power amplifying tube is connected with the drain bias circuit, the drain bias circuit is connected with the output matching circuit, the output matching circuit is connected with the output port, and the power supply is respectively connected with the grid bias circuit and the drain bias circuit.
As shown in fig. 2, the input matching circuit includes an input matching transformer T1, a resistor R1, a resistor R2, a resistor R3, a capacitor C1, and a capacitor C9, two ends of the resistor R2 are respectively connected to the resistor R1 and the resistor R3, the other ends of the resistor R1 and the resistor R3 are grounded, one end of the capacitor C9 is connected to the resistor R2, the other end is grounded, one end of the input matching transformer T1 is connected to the resistor R2, the other end is connected to the capacitor C1, and the capacitor C1 is a dual variable capacitor.
The output matching circuit comprises an output matching transformer T2, a capacitor C5 and a capacitor C6, one end of the output matching transformer T2 is connected with the capacitor C5, the other end of the output matching transformer T2 is connected with the capacitor C6, and the capacitor C5 is a duplex variable capacitor.
The input matching circuit and the output matching circuit are used for matching impedance, so that the voltage is more stable.
the gate bias circuit comprises a first filter circuit, a second filter circuit, a resistor R6, a resistor R7, a diode D1, a diode D2 and an inductor L1; one end of the resistor R7 is connected with a power supply, the other end of the resistor R7 is connected with the cathode of the diode D1 and one end of the resistor R8 respectively, the anode of the diode D1 is grounded, the other end of the resistor R8 is connected with the first filter circuit and one end of the inductor L1, and the other end of the inductor L1 is connected with the second filter circuit and the grid of the power amplifying tube. The gate bias circuit is used to provide a stable gate voltage for the power amplifier transistor Q1.
The first filter circuit is composed of two capacitors which are connected in parallel and grounded.
The second filter circuit is formed by connecting two parallel resistors with a capacitor in series, and the other end of the capacitor is grounded.
The drain biasing circuit comprises an inductor L2 and a second filter circuit; and one end of the inductor L2 is connected with the drain electrode of the power amplifying tube, and the other end of the inductor L2 is connected with the third filter circuit and the power supply. The drain bias circuit is used for providing a stable drain voltage for the power amplifier tube Q1.
The third filter circuit is composed of two capacitors which are connected in parallel and grounded.
The utility model provides a power amplifier has light in weight, small, efficient, wide, the gain of bandwidth is high, output is high, good heat dissipation, stability is high, adopt the advantage of sealed technology.
Claims (6)
1. A power amplifier is characterized by comprising a shell and a power amplifying circuit in the shell; the power amplification circuit comprises an input port, an output port, an input matching circuit, an output matching circuit, a power amplifier tube, a grid bias circuit, a drain bias circuit and a power supply; the input port is connected with the input matching circuit, the input matching circuit is connected with the grid bias circuit, the grid bias circuit is connected with the grid of the power amplifying tube, the source electrode of the power amplifying tube is grounded, the drain electrode of the power amplifying tube is connected with the drain bias circuit, the drain bias circuit is connected with the output matching circuit, the output matching circuit is connected with the output port, and the power supply is respectively connected with the grid bias circuit and the drain bias circuit.
2. The power amplifier of claim 1, wherein the gate bias circuit comprises a first filter circuit, a second filter circuit, a resistor R6, a resistor R7, a diode D1, a diode D2, and an inductor L1; one end of the resistor R7 is connected with a power supply, the other end of the resistor R7 is connected with the cathode of the diode D1 and one end of the resistor R8 respectively, the anode of the diode D1 is grounded, the other end of the resistor R8 is connected with the first filter circuit and one end of the inductor L1, and the other end of the inductor L1 is connected with the second filter circuit and the grid of the power amplifying tube.
3. A power amplifier according to claim 2, wherein the first filter circuit comprises two capacitors connected in parallel to ground.
4. The power amplifier of claim 2, wherein the second filter circuit comprises two parallel resistors connected in series with a capacitor, the other end of the capacitor being connected to ground.
5. The power amplifier of claim 1, wherein the drain bias circuit comprises an inductor L2 and a second filter circuit; and one end of the inductor L2 is connected with the drain electrode of the power amplifying tube, and the other end of the inductor L2 is connected with the third filter circuit and the power supply.
6. A power amplifier according to claim 5, characterised in that the third filter circuit consists of two capacitors connected in parallel to ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920282641.9U CN209767485U (en) | 2019-03-06 | 2019-03-06 | Power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920282641.9U CN209767485U (en) | 2019-03-06 | 2019-03-06 | Power amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209767485U true CN209767485U (en) | 2019-12-10 |
Family
ID=68753659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920282641.9U Active CN209767485U (en) | 2019-03-06 | 2019-03-06 | Power amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209767485U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113014213A (en) * | 2021-02-23 | 2021-06-22 | 合肥芯谷微电子有限公司 | Preamplifier and magnetic resonance imaging system |
-
2019
- 2019-03-06 CN CN201920282641.9U patent/CN209767485U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113014213A (en) * | 2021-02-23 | 2021-06-22 | 合肥芯谷微电子有限公司 | Preamplifier and magnetic resonance imaging system |
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