CN215581072U - Power amplifier final-stage power amplification module - Google Patents
Power amplifier final-stage power amplification module Download PDFInfo
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- CN215581072U CN215581072U CN202121891426.2U CN202121891426U CN215581072U CN 215581072 U CN215581072 U CN 215581072U CN 202121891426 U CN202121891426 U CN 202121891426U CN 215581072 U CN215581072 U CN 215581072U
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Abstract
The application provides a power amplifier last stage power amplifier module, the module includes: the excitation unit is used for carrying out preliminary amplification and input protection on an input signal; the driving unit is used for amplifying the signal output by the exciting unit; the amplifying unit is used for amplifying the signal output by the driving unit in multiple stages; the power distribution unit is used for dividing the signal output by the amplifying unit into a plurality of paths of output signals; the combiner unit is used for combining the multi-path output signals into one path of output; a control unit for providing power; the excitation unit, the driving unit, the amplification unit, the power distribution unit and the combining unit are all connected with the control unit, the input end of the excitation unit is connected with an input signal, the output end of the excitation unit is connected with the input end of the driving unit, the output end of the driving unit is connected with the input end of the amplification unit, the output end of the amplification unit is connected with the input end of the power distribution unit, and the output end of the power distribution unit is connected with the input end of the combining unit.
Description
Technical Field
The application relates to the technical field of radio frequency power amplifiers, in particular to a final power amplifier module of a power amplifier.
Background
The power amplifier is one of the most expensive and important components in electronic systems, the requirements for power amplifier applications in different fields are different, and low radio frequency power amplifiers are mainly used in the field of electromagnetic compatibility testing. Electromagnetic interference (EM I) is simulated by a broadband power amplifier in a specific test environment to test the electromagnetic interference immunity (EMS) of a device under test in a system or environment. Because the power amplifier generally cannot take into account parameters such as bandwidth, stability, power, efficiency, standing wave, gain flatness, power flatness, etc., the prior art has the technical problems of low output power and poor gain flatness under the coverage of a wider operating frequency band.
SUMMERY OF THE UTILITY MODEL
The present application provides a final power amplifier module of a power amplifier, which is used to effectively overcome the technical defect of low output power in the prior art.
In a first aspect, an embodiment of the present application provides a final power amplifier module of a power amplifier, where the module includes: the excitation unit is used for carrying out preliminary amplification and input protection on an input signal; the driving unit is used for amplifying the signal output by the exciting unit; the amplifying unit is used for amplifying the signal output by the driving unit in multiple stages; the power distribution unit is used for dividing the signal output by the amplifying unit into a plurality of paths of output signals; the combiner unit is used for combining the multi-path output signals into one path of output; the control unit is used for providing a power supply and protecting the excitation unit, the driving unit, the amplifying unit, the power distribution unit and the combining unit; the excitation unit, the driving unit, the amplification unit, the power distribution unit and the combining unit are all connected with the control unit, the input end of the excitation unit is connected with an input signal, the output end of the excitation unit is connected with the input end of the driving unit, the output end of the driving unit is connected with the input end of the amplification unit, the output end of the amplification unit is connected with the input end of the power distribution unit, the output end of the power distribution unit is connected with the input end of the combining unit, and the output end of the combining unit is used as a signal output end.
With reference to the first aspect, in a first possible implementation manner, the excitation unit includes: the device comprises an amplitude limiter, a filter, a first gain module, a power divider, a switch and a second gain module; the input end of the amplitude limiter is connected with an input signal, the output end of the amplitude limiter is sequentially connected with the filter, the first gain module, the power divider, the switch and the second gain module, and the output end of the second gain module is connected with the input end of the driving unit.
With reference to the first aspect, in a second possible implementation manner, the amplifying unit includes: the input end of the penultimate module is connected with the output end of the driving unit, the output end of the penultimate module is connected with the input end of the first final stage module, and the output end of the first final stage module is connected with the input end of the power distribution unit; the secondary final stage module is used for carrying out primary amplification on the signal output by the driving unit, and the first final stage module is used for carrying out secondary amplification on the signal output by the secondary final stage module.
With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner, the power distribution unit has a plurality of power output ends, each power output end corresponds to one power branch, each power branch includes a second last-stage module, one end of each second last-stage module is connected to one power output end of the plurality of power output ends of the power distribution unit, and the other end of each second last-stage module is connected to the input end of the combining unit.
With reference to the first aspect, in a fourth possible implementation manner, the module further includes: and the input end of the coupling unit is connected with the output end of the combining unit, and the first output end of the coupling unit is determined as a signal output end.
With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner, the coupling unit has a forward signal coupling port and a reflected signal coupling port, and is connected to the control unit, and is configured to perform over-output protection and over-reflection protection on the output signal.
With reference to the fourth possible implementation manner of the first aspect, in a sixth possible implementation manner, the module further includes: and the wave detection unit is connected with the second output end of the coupling unit.
Compared with the prior art, the utility model has the beneficial effects that: the utility model designs a plurality of protection circuits, comprising: the module can work in a frequency range of 70MHz to 1010MHz, the maximum output power is above 560W, the noise coefficient is below 7dB, and the gain is above 60dB, so that the functions of high-power output, over-temperature protection, over-current protection, overvoltage protection, over-reflection protection, open-circuit protection and the like are realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a structural diagram of a final power amplifier module of a power amplifier according to an embodiment of the present disclosure;
fig. 2 is a structural diagram of an excitation unit according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Referring to fig. 1, an embodiment of the present application provides a final power amplifier module of a power amplifier, where the module includes: the excitation unit is used for carrying out preliminary amplification and input protection on an input signal; the driving unit is used for amplifying the signal output by the exciting unit; the amplifying unit is used for amplifying the signal output by the driving unit in multiple stages; the power distribution unit is used for dividing the signal output by the amplifying unit into a plurality of paths of output signals; the combiner unit is used for combining the multi-path output signals into one path of output; the control unit is used for providing a power supply and protecting the excitation unit, the driving unit, the amplifying unit, the power distribution unit and the combining unit; the excitation unit, the driving unit, the amplification unit, the power distribution unit and the combining unit are all connected with the control unit, the input end of the excitation unit is connected with an input signal, the output end of the excitation unit is connected with the input end of the driving unit, the output end of the driving unit is connected with the input end of the amplification unit, the output end of the amplification unit is connected with the input end of the power distribution unit, the output end of the power distribution unit is connected with the input end of the combining unit, and the output end of the combining unit is used as a signal output end. In the embodiment of the application, the working frequency band of the final power amplifier module of the power amplifier is 70MHz to 1010 MHz.
In particular, as a possible implementation, the excitation unit comprises: the device comprises an amplitude limiter, a filter, a first gain module, a power divider, a switch and a second gain module; the input end of the amplitude limiter is connected with an input signal, the output end of the amplitude limiter is sequentially connected with the filter, the first gain module, the power divider, the switch and the second gain module, and the output end of the second gain module is connected with the input end of the driving unit. The amplitude limiter, the filter, the first gain module, the power divider, the switch and the second gain module have different gains, and the cascade circuit structure can carry out preliminary amplification on input small signals and carry out input protection and signal modulation.
As another possible embodiment, the amplifying unit includes: the input end of the penultimate module is connected with the output end of the driving unit, the output end of the penultimate module is connected with the input end of the first final stage module, and the output end of the first final stage module is connected with the input end of the power distribution unit; the secondary final stage module is used for carrying out primary amplification on the signal output by the driving unit, and the first final stage module is used for carrying out secondary amplification on the signal output by the secondary final stage module. The secondary final stage module amplifies the signal output by the driving unit for one time, so that the signal is in a range capable of being received by the first final stage module; the first final stage module performs secondary amplification on the signal output by the second final stage module and transmits the amplified signal to the input end of the power distribution unit.
As a possible implementation manner, the power distribution unit has a plurality of power output ends, each power output end corresponds to one power branch, each power branch includes one second final stage block, one end of each second final stage block is connected to one of the plurality of power output ends of the power distribution unit, and the other end of each second final stage block is connected to the input end of the combining unit. In this embodiment of the application, the power distribution unit divides an input signal into 4 paths, a second final stage module is arranged on each path for amplifying a signal of each branch, each path of signal amplified by the second final stage module is input to the combining unit, and the combining unit combines the 4 paths of signals passing through the second final stage module into 1 path, so that the output signal has high output power.
As a possible implementation, the module further comprises: and the input end of the coupling unit is connected with the output end of the combining unit, and the first output end of the coupling unit is determined as a signal output end. The coupling unit is provided with a forward signal coupling port and a reflection signal coupling port, and is connected with the control unit and used for performing over-output protection and over-reflection protection on the output signal.
In the embodiment of the application, the control unit converts the external input voltage into the voltage required by the internal unit, and controls and cooperates with the internal unit; the excitation unit, the driving unit, the amplifying unit, the power distribution unit and the combining unit jointly realize the functions of over-temperature protection, over-current protection, over-voltage protection, over-reflection protection, open-circuit protection, over-output protection and the like.
As a possible implementation, the module further comprises: and the wave detection unit is connected with the second output end of the coupling unit.
To sum up, the embodiment of the present application provides a final power amplifier module of a power amplifier, and the module includes: the excitation unit is used for carrying out preliminary amplification and input protection on an input signal; the driving unit is used for amplifying the signal output by the exciting unit; the amplifying unit is used for amplifying the signal output by the driving unit in multiple stages; the power distribution unit is used for dividing the signal output by the amplifying unit into a plurality of paths of output signals; the combiner unit is used for combining the multi-path output signals into one path of output; the control unit is used for providing a power supply and protecting the excitation unit, the driving unit, the amplifying unit, the power distribution unit and the combining unit; the excitation unit, the driving unit, the amplification unit, the power distribution unit and the combining unit are all connected with the control unit, the input end of the excitation unit is connected with an input signal, the output end of the excitation unit is connected with the input end of the driving unit, the output end of the driving unit is connected with the input end of the amplification unit, the output end of the amplification unit is connected with the input end of the power distribution unit, the output end of the power distribution unit is connected with the input end of the combining unit, and the output end of the combining unit is used as a signal output end.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (7)
1. A power amplifier final stage power amplifier module, comprising:
the excitation unit is used for carrying out preliminary amplification and input protection on an input signal;
the driving unit is used for amplifying the signal output by the exciting unit;
the amplifying unit is used for carrying out multi-stage amplification on the signal output by the driving unit;
the power distribution unit is used for dividing the signal output by the amplifying unit into a plurality of output signals;
the combiner unit is used for combining the multi-path output signals into one path of output;
a control unit for providing a power supply and protecting the excitation unit, the driving unit, the amplifying unit, the power distributing unit and the combining unit;
the excitation unit, the driving unit, the amplification unit, the power distribution unit and the combining unit are all connected with the control unit, the input end of the excitation unit is connected with an input signal, the output end of the excitation unit is connected with the input end of the driving unit, the output end of the driving unit is connected with the input end of the amplification unit, the output end of the amplification unit is connected with the input end of the power distribution unit, the output end of the power distribution unit is connected with the input end of the combining unit, and the output end of the combining unit is used as a signal output end.
2. The power amplifier final power amplifier module of claim 1, wherein the driver unit comprises: the device comprises an amplitude limiter, a filter, a first gain module, a power divider, a switch and a second gain module;
the input end of the amplitude limiter is connected with an input signal, the output end of the amplitude limiter is sequentially connected with the filter, the first gain module, the power divider, the switch and the second gain module, and the output end of the second gain module is connected with the input end of the driving unit.
3. The power amplifier final power amplifier module of claim 1, wherein the amplifying unit comprises: a sub-final stage block and a first final stage block, an input terminal of the sub-final stage block being connected to an output terminal of the driving unit, an output terminal of the sub-final stage block being connected to an input terminal of the first final stage block, an output terminal of the first final stage block being connected to an input terminal of the power distribution unit; the sub-final stage module is used for carrying out primary amplification on the signal output by the driving unit, and the first final stage module is used for carrying out secondary amplification on the signal output by the sub-final stage module.
4. The final power amplifier stage of claim 3, wherein the power distribution unit has a plurality of power output terminals, each of the power output terminals corresponds to one of the power branches, each of the power branches includes a second final stage module, and one end of each of the second final stage modules is connected to one of the power output terminals of the power distribution unit, and the other end of each of the second final stage modules is connected to the input terminal of the combining unit.
5. The power amplifier last stage power amplifier module of claim 1, further comprising: and the input end of the coupling unit is connected with the output end of the combining unit, and the first output end of the coupling unit is determined as a signal output end.
6. The final power amplifier module of claim 5, wherein the coupling unit has a forward signal coupling port and a reflected signal coupling port, and the coupling unit is connected to the control unit for performing over-output protection and over-reflection protection on the output signal.
7. The power amplifier last stage power amplifier module of claim 5, further comprising: and the wave detection unit is connected with the second output end of the coupling unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121891426.2U CN215581072U (en) | 2021-08-12 | 2021-08-12 | Power amplifier final-stage power amplification module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121891426.2U CN215581072U (en) | 2021-08-12 | 2021-08-12 | Power amplifier final-stage power amplification module |
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| Publication Number | Publication Date |
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| CN215581072U true CN215581072U (en) | 2022-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121891426.2U Active CN215581072U (en) | 2021-08-12 | 2021-08-12 | Power amplifier final-stage power amplification module |
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| CN (1) | CN215581072U (en) |
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2021
- 2021-08-12 CN CN202121891426.2U patent/CN215581072U/en active Active
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