CN211239802U - High-voltage high-power amplifier module - Google Patents
High-voltage high-power amplifier module Download PDFInfo
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- CN211239802U CN211239802U CN202020189939.8U CN202020189939U CN211239802U CN 211239802 U CN211239802 U CN 211239802U CN 202020189939 U CN202020189939 U CN 202020189939U CN 211239802 U CN211239802 U CN 211239802U
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Abstract
The utility model discloses a high-power amplifier module of high voltage, the means of having solved the output of current improvement power amplifier module is that many power amplifier tubes carry out power synthesis, leads to the circuit volume great like this, and the circuit is complicated, can not satisfy the problem of the miniaturized requirement of current stage module. The utility model discloses a preceding stage drive power amplifier and final stage power amplifier, the preceding stage drive power amplifier with the final stage power amplifier is connected, the preceding stage drive power amplifier includes multistage drive power amplifier tube, the final stage power amplifier includes the final stage power amplifier tube, the final stage power amplifier tube improves the output of single final stage power amplifier tube through improving drain voltage. The utility model has the advantages of output is big, the circuit size is little, satisfy the miniaturized requirement of module.
Description
Technical Field
The utility model relates to an aviation radio communication technical field, concretely relates to high-voltage high-power amplifier module.
Background
The existing aviation radio communication navigation identification equipment works in various modes in an L wave band, such as air traffic control, precision distance measurement, Takang, a joint tactical information distribution system and the like. At present, the aviation radio communication navigation identification system gradually tends to be miniaturized and integrated, and the requirement on the output power of a power amplifier module is higher.
In order to improve the output power of the power amplifier module, the prior art mainly adopts a method for power synthesis of a plurality of power amplifiers, and after the power synthesis of the plurality of power amplifiers, the circuit has a large volume and a complex circuit design, and cannot meet the requirement of module miniaturization at the present stage.
Therefore, there is a need to develop a new power amplifier module which can increase the output power of the power amplifier module, reduce the circuit size, and meet the miniaturization requirement.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the existing means for improving the output power of the power amplifier module is to synthesize the power of a plurality of power amplifier tubes, which results in a larger circuit volume and a complex circuit and can not meet the requirement of miniaturization of the module at the present stage.
The utility model provides a solve the high-power amplifier module of high voltage of above-mentioned problem.
The utility model discloses a following technical scheme realizes:
the utility model provides a high-power amplifier module of high voltage, includes preceding stage drive power amplifier and final stage power amplifier, preceding stage drive power amplifier with the final stage power amplifier is connected, preceding stage drive power amplifier is including driving the power amplifier tube, the final stage power amplifier includes the final stage power amplifier tube, the output that single final stage power amplifier tube was improved through improving drain electrode voltage to the final stage power amplifier tube.
The utility model discloses an improve the drain voltage of last stage power amplifier tube, can improve the output of single last stage power amplifier tube, under the condition that transmitter output is the same, use the less last stage power amplifier tube of quantity to carry out power synthesis and just can satisfy output's requirement, reduced the volume of power amplifier module and simplified circuit like this.
The utility model discloses preferred a high-power amplifier module of high voltage, the last stage power amplifier tube is the GaN power amplifier tube, drain electrode voltage is the constant voltage, specifically is + 65V.
Under the same test condition, compared with the LDMOS power amplifier tube, the output power of the GaN power amplifier tube is improved by about 3dB, and the efficiency is improved by at least about 10%. The GaN power amplifier tube meets the miniaturization requirement of the power amplifier module at the present stage. In the application of the GaN power amplifier tube, the gate voltage and the drain voltage of the power amplifier tube are important parameters, wherein the gate voltage is a negative voltage, and the drain voltage is a positive voltage. In tests and experiments, it is found that if the actual working voltage of the power amplifier tube is lower than the rated drain voltage, the output power of the power amplifier tube will be reduced, and the general rule is that under the condition that other conditions are not changed, the drain voltage is reduced by 4V, and the output power of the power amplifier tube is reduced by about 1 dB. Then, if the drain voltage of the power amplifier tube is increased but not more than the rated voltage, the output power of the power amplifier tube will be increased.
For the GaN power amplifier tube, the grid voltage adopts negative voltage, and the grid current of the power amplifier tube is usually very small; the drain voltage of the power amplifier tube usually adopts +28V and +50V, and the drain voltage of the last stage power amplifier tube of the power amplifier module adopts high voltage, specifically +65V, when the drain voltage of the last stage power amplifier tube is constant voltage +65V, the output power of the last stage power amplifier tube becomes large, the number of the last stage power amplifier tubes can be reduced, thereby reducing the volume of the power amplifier module and simplifying the circuit.
The utility model discloses preferred high-power amplifier module of high voltage, the grid of final stage power amplifier tube is connected with decoupling capacitance C21, the constant voltage source is connected to the grid of final stage power amplifier tube, decoupling capacitance C21's appearance value is for sending out the level a little.
The utility model discloses it is preferred that a high-power amplifier module of high voltage, the last power amplifier pipe is a plurality of, every be connected with pulse signal generator on the last power amplifier pipe respectively, pulse signal generator adjusts every the grid voltage of last power amplifier pipe, the output and the wave form of real-time control power amplifier module, the grid of last power amplifier pipe is connected with decoupling capacitor C21, the grid voltage of last power amplifier pipe is modulation voltage, decoupling capacitor C21's appearance value is less than 100 pF.
For the pulse power amplifier, a mode that the grid voltage and the drain voltage of the final power amplifier tube are constant voltages, a mode that the grid voltage of the power amplifier tube is modulated, a mode that the drain voltage of the power amplifier tube is modulated, or a mode that the grid voltage and the drain voltage are modulated simultaneously and the like can be adopted. Since a high drain voltage is used herein, the drain voltage of the power amplifier tube is given a constant voltage and the gate voltage is given a constant voltage or modulated. When the grid voltage is constant voltage, the capacitance value of a decoupling capacitor C21 connected to the grid of the power amplifier tube is a micro-power stage, a current-limiting resistor R1 is connected between the grid voltage of the final-stage power amplifier tube and the grid of the power amplifier tube in series, the drain end of the final-stage power amplifier tube is connected with filter capacitors C22 and C23, and for pulse power amplification, an energy-storage capacitor C24 is added at the drain end of the final-stage power amplifier tube.
The utility model discloses preferably a high-power amplifier module of high voltage, be connected with the attenuator between preceding stage drive power amplifier and the final stage power amplifier, the attenuator, the setting of attenuator can prevent effectively that the output signal of drive power amplifier pipe is too big and burn out the final stage power amplifier pipe, increases the isolation between preceding stage drive power amplifier and the final stage power amplifier simultaneously.
The utility model discloses preferred a high-voltage high-power amplifier module, last stage power amplifier has still connected gradually isolator and high-power filter, the isolator also can be the circulator, and isolator or circulator play the effect of protection last stage power amplifier, weaken or eliminate the influence of the change of external impedance to the radio frequency. The high-power filter is mainly used for suppressing harmonic waves and clutter of a transmitted spectrum so as to meet the index requirement of a transmitter on the spectrum characteristic.
The utility model discloses preferably a high-power amplifier module of high voltage, preceding stage drive power amplifier still is connected with the frequency source, preceding stage drive power amplifier is confirmed according to the output of frequency source and the drive power that final stage power amplifier needs the progression of the drive power amplifier tube of preceding stage drive power amplifier.
The utility model discloses following beneficial effect has:
the utility model discloses a last power amplifier tube uses high voltage of drain to obtain great single tube output, obtains bigger output through using the last power amplifier tube synthetic circuit of many drain electrode high voltages, effectively reduces the size of person's power amplifier module through using the last power amplifier tube synthetic circuit of many drain electrode high voltages.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a working block diagram of the power amplifier module of the present invention.
Fig. 2 is a schematic circuit diagram of a single final stage power amplifier tube of the present invention.
Fig. 3 is the final stage power amplifier tube layout of the present invention.
Reference numbers and corresponding part names in the drawings:
1-frequency source, 2-preceding stage drive power amplifier, 3-attenuator, 4-final stage power amplifier, 5-isolator or circulator, 6-high power filter and 7-final stage power amplifier tube.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Example 1
As shown in fig. 1 and 2, a high-voltage high-power amplifier module includes a frequency source 1, a preceding-stage driving power amplifier 2 and a final-stage power amplifier 4, which are connected in sequence, where the preceding-stage driving power amplifier 2 is in the prior art and includes a multi-stage driving power amplifier tube, a programmable attenuator 3, an isolator or a circulator, and the preceding-stage driving power amplifier 2 determines the stage number and the output power of the driving power amplifier tube of the preceding-stage driving power amplifier 2 according to the output power of the frequency source 1 and the driving power required by the final-stage power amplifier 4, the final-stage power amplifier 4 includes a final-stage power amplifier tube 7, the final-stage power amplifier tube 7 increases the output power of the single final-stage power amplifier tube 7 by increasing the drain voltage, the final-stage power amplifier tube 7 is a GaN power amplifier tube, and the drain voltage is a constant voltage source.
When the drain voltage of the final power amplifier tube 7 is +65V, the output power of the final power amplifier tube 7 is increased, and the number of the final power amplifier tubes 7 can be reduced, thereby reducing the volume of the power amplifier module and simplifying the circuit.
The gate of the final power amplifier tube 7 is connected with a decoupling capacitor C21, the gate of the final power amplifier tube 7 is connected with a constant voltage source, and the capacitance value of the decoupling capacitor C21 is a micro-stage.
For the pulse power amplifier, a mode that the gate voltage and the drain voltage of the final power amplifier tube 7 are both constant voltages, a mode that the gate voltage of the power amplifier tube is modulated, a mode that the drain voltage of the power amplifier tube is modulated, or a mode that the gate voltage and the drain voltage are modulated simultaneously and the like can be adopted. Because the utility model discloses the use is high drain voltage, and the drain voltage of consequently power amplifier tube gives for the constant voltage, and grid voltage gives the mode of constant voltage or modulation. When the grid voltage is constant voltage, the capacitance value of a decoupling capacitor C21 connected to the grid of the power amplifier tube is a micro-power stage, a current-limiting resistor R1 is connected between the grid voltage of the final power amplifier tube 7 and the grid of the power amplifier tube in series, the capacitor C22 and the capacitor C23 are connected to the drain end of the final power amplifier tube 7, an energy-storing capacitor C24 is added to the drain end of the final power amplifier tube 7 for pulse power amplification, the energy-storing capacitor C24 provides instantaneous large current required by the drain end, VGG is the grid voltage of the power amplifier, negative voltage is provided for the GaN power amplifier tube, VDD is the drain voltage, and the drain voltage is +65V direct-current supply voltage.
Be connected with attenuator 3 between preceding stage drive power amplifier 2 and the last stage power amplifier 4, attenuator 3's setting can effectively prevent that the output signal of drive power amplifier pipe is too big and burn out last stage power amplifier pipe 7, increases the isolation between preceding stage drive power amplifier 2 and the last stage power amplifier 4 simultaneously.
The final stage power amplifier 4 is also sequentially connected with an isolator or circulator 5 and a high-power filter 6, and the isolator 5 plays a role in protecting the final stage power amplifier and reduces or eliminates the influence of the change of external impedance on radio frequency. The high-power filter 6 is mainly used for suppressing harmonic waves and clutter of a transmission frequency spectrum so as to meet the index requirement of a transmitter on frequency spectrum characteristics.
Based on the final power amplifier tube 7 being a high drain voltage GaN power amplifier tube, the application of pulse output is realized by using a constant gate voltage and a constant drain voltage as shown in fig. 3. The final power amplifier tube is installed on the cavity, the capacitors C1 and C14 are blocking capacitors connected in series at the input end and the output end of the power amplifier tube respectively, the capacitors C2, C3, C4, C5, C6 and C7 are filter capacitors at the grid end of the power amplifier tube, the capacitors C8, C9, C10, C11, C12 and C13 are filter capacitors at the drain end of the power amplifier tube, and the resistors R2 and R3 are current-limiting resistors connected in series between the grid power supply end and the power amplifier tube.
Example 2
The difference between this embodiment and embodiment 1 is that a plurality of final power amplifiers 7 are provided, each final power amplifier 7 is connected to a pulse signal generator, the pulse signal generator adjusts a gate voltage of each final power amplifier 7 to control an output power and a waveform of a power amplifier module in real time, a gate of the final power amplifier 7 is connected to a decoupling capacitor C21, the gate voltage of the final power amplifier 7 is a modulation voltage, a capacitance value of the decoupling capacitor C21 is smaller than 100pF, and the pulse signal generator is connected to a dc power supply to supply power to the dc power supply.
The final power amplifier 4 can select a single-path power amplifier, two-path power amplifier synthesis and three-path power amplifier synthesis according to the output power of the final port, and theoretically, the power synthesis output can be performed after the amplification of the N paths of power amplifiers according to the output power.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. The utility model provides a high-power amplifier module of high voltage, its characterized in that, includes preceding stage drive power amplifier and final stage power amplifier, preceding stage drive power amplifier with the final stage power amplifier is connected, preceding stage drive power amplifier is including driving the power amplifier tube, the final stage power amplifier includes the final stage power amplifier tube, the output that single final stage power amplifier tube was improved to the final stage power amplifier tube through improving drain electrode voltage, be connected with the attenuator between preceding stage drive power amplifier and the final stage power amplifier.
2. The high-voltage high-power amplifier module according to claim 1, wherein the final power amplifier tube is a GaN power amplifier tube, and the drain voltage is a constant voltage, specifically + 65V.
3. The high-voltage high-power amplifier module according to claim 1 or 2, wherein a gate of the final power amplifier tube is connected to a decoupling capacitor C21, the gate of the final power amplifier tube is connected to a constant voltage source, and a capacitance value of the decoupling capacitor C21 is a micro-stage.
4. The high-voltage high-power amplifier module according to claim 1 or 2, wherein the number of the last power amplifier tubes is plural, each last power amplifier tube is connected with a pulse signal generator, the pulse signal generator adjusts a gate voltage of each last power amplifier tube to control an output power and a waveform of the power amplifier module in real time, a gate of the last power amplifier tube is connected with a decoupling capacitor C21, the gate voltage of the last power amplifier tube is a modulation voltage, and a capacitance value of the decoupling capacitor C21 is less than 100 pF.
5. The high-voltage high-power amplifier module according to claim 1 or 2, wherein said final power amplifier further comprises an isolator and a high-power filter connected in sequence.
6. The high-voltage high-power amplifier module according to claim 1 or 2, wherein the pre-driver amplifier further connects to a frequency source circuit, and determines the number of stages and output power of the driver amplifier tube of the pre-driver amplifier according to the output power of the frequency source and the driving power required by the final amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020189939.8U CN211239802U (en) | 2020-02-20 | 2020-02-20 | High-voltage high-power amplifier module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020189939.8U CN211239802U (en) | 2020-02-20 | 2020-02-20 | High-voltage high-power amplifier module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211239802U true CN211239802U (en) | 2020-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020189939.8U Active CN211239802U (en) | 2020-02-20 | 2020-02-20 | High-voltage high-power amplifier module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211239802U (en) |
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2020
- 2020-02-20 CN CN202020189939.8U patent/CN211239802U/en active Active
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