CN211239794U - Solid-state microwave generating device - Google Patents
Solid-state microwave generating device Download PDFInfo
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- CN211239794U CN211239794U CN201922501899.6U CN201922501899U CN211239794U CN 211239794 U CN211239794 U CN 211239794U CN 201922501899 U CN201922501899 U CN 201922501899U CN 211239794 U CN211239794 U CN 211239794U
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Abstract
The utility model discloses a solid microwave generating device, which comprises a power supply, a power amplifier tube, a drain electrode power supply regulating circuit, a feedback circuit and a control unit; the first input end of the drain electrode power supply regulating circuit is connected with the control unit, the second input end of the drain electrode power supply regulating circuit is connected with a power supply, the output end of the drain electrode power supply regulating circuit is connected with the drain electrode of the power amplifying tube, and the drain electrode of the power amplifying tube is connected with the grid electrode of the power amplifying tube through the feedback circuit; the drain electrode of the power amplifying tube is used for outputting a microwave signal; the power supply also supplies power for the control unit. The utility model discloses a device utilizes feedback circuit and 1 level power amplifier tube can produce in, powerful microwave signal, and can adjust power, and device area is all less, greatly reduced the cost.
Description
Technical Field
The utility model relates to a microwave generation technical field, more specifically relates to a solid-state microwave generating device.
Background
Microwaves can be used not only for transmitting information, but also as energy, and are applied to the fields of heating, drying, sterilization, disinfection, semiconductor manufacturing and the like.
The generation of medium and high power microwaves is generally generated by adopting a magnetron. A magnetron is essentially a diode placed in a constant magnetic field. Under the control of the constant magnetic field and the constant electric field which are vertical to each other, electrons in the tube interact with the high-frequency electromagnetic field to convert energy obtained from the constant electric field into microwave energy, thereby achieving the purpose of generating the microwave energy. The magnetron needs a high voltage of kilovolt to work, which brings about a potential safety hazard and also makes the microwave generating device bulky. The mechanism of the magnetron determines that the power of the microwave signal cannot be continuously adjusted.
In order to overcome the defects of the magnetron microwave generating device, in recent years, researchers are studying to generate medium and high power microwaves by using a solid state device, and basically introduce a radio frequency amplifier tube structure in wireless communication, in order to generate medium and high power microwave signals, the structure generally requires 3-4 stages or more of power amplifier tubes to be cascaded, the microwave generating circuit is connected with a multistage power amplifying tube, specifically, the microwave generating circuit is sequentially connected with two class-A amplifying tubes, an AB amplifying tube and a C amplifying tube, an amplitude modulator is connected between the two class-A amplifying tubes, a one-way conductive device is connected between the AB amplifying tube and the C amplifying tube, a frequency adjusting signal is input into the microwave generating circuit to adjust the frequency of an output microwave signal, and a power adjusting signal is input into the amplitude modulator to adjust the power of the output microwave signal. The adoption of the structure leads to high cost and large volume (area) of the system, which restricts the scale application of the solid-state microwave generating device in the microwave energy industry.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming at least one kind of defect (not enough) of above-mentioned prior art, provide a solid-state microwave generating device, can realize well, high-power microwave, and the device volume is less.
The technical proposal adopted by the utility model is that,
a solid-state microwave generating device comprises a power supply, a power amplifier tube, a drain electrode power supply regulating circuit, a feedback circuit and a control unit; the first input end of the drain electrode power supply regulating circuit is connected with the control unit, the second input end of the drain electrode power supply regulating circuit is connected with a power supply, the output end of the drain electrode power supply regulating circuit is connected with the drain electrode of the power amplifying tube, and the drain electrode of the power amplifying tube is connected with the grid electrode of the power amplifying tube through the feedback circuit; the drain electrode of the power amplifying tube is used for outputting a microwave signal; the power supply also supplies power for the control unit.
The utility model provides a solid-state microwave generating device designs a power amplifier tube into a voltage-controlled oscillator through a feedback circuit, and the drain electrode of the power amplifier tube is connected with the grid electrode of the power amplifier tube through the feedback circuit, thereby forming a voltage-controlled oscillator; the output signal frequency of the oscillator is determined by the grid voltage of the power amplifier tube, the output maximum power is determined by the saturation power of the power amplifier tube under the maximum drain electrode working voltage, therefore, when the system needs to adjust the power of the output signal of the oscillator, the control unit sends a drain electrode power supply adjusting signal to the first input end of the drain electrode power supply adjusting circuit connected with the control unit for adjustment, the first input end of the drain electrode power supply adjusting circuit is used for receiving the signal and adjusting the drain electrode power supply of the power amplifier tube according to the signal to adjust the output power, and the output power is adjusted according to the P-U ratio2The following can be found in the formula,/2R: as the voltage decreases, the power decreases exponentially with the voltage. Therefore, when the system needs power adjustment, the control unit outputs a drain power supply adjusting signal to the drain power supply adjusting circuit, and the output voltage of the circuit changes along with the change, so that the output power of the oscillator formed by the power amplifying tube changes along with the change; the output signal of the oscillator is output from the drain electrode of the power amplifier tube; and the power supply is connected with the second input end of the control unit and the drain electrode power supply regulating circuit.
The utility model discloses a solid-state microwave generating device utilizes the voltage controlled oscillator that feedback circuit and 1 level power amplifier tube are constituteed, can produce in, powerful microwave signal, and can adjust the power of microwave signal through drain electrode power supply regulating circuit and the control unit, and device volume and area are all less, greatly reduced the cost.
The power amplifier further comprises a grid power supply adjusting circuit, the control unit is further connected with a first input end of the grid power supply adjusting circuit, a power supply is connected with a second input end of the grid power supply adjusting circuit, and an output end of the grid power supply adjusting circuit is connected with a grid of the power amplifying tube.
When the system needs to adjust the frequency of the output signal of the oscillator, the control unit sends a first grid power supply adjusting signal to a grid power supply adjusting circuit connected with the control unit, and the grid power supply adjusting circuit adjusts the grid voltage according to the signal after receiving the signal so as to adjust the frequency of the output signal of the oscillator; the utility model provides an among the device, no matter the regulation of oscillator output signal's power, still the regulation of frequency, all unify and send first grid power supply regulating signal and drain electrode power supply regulating signal to different component control and management by the control unit, be favorable to the device adjusts output signal's power and frequency more accurately.
Further, still include grid bias circuit, phase discriminator and microwave source, the input and the control unit of microwave source are connected, and the output is connected with the input of phase discriminator, the drain electrode of power amplifier tube is still connected to the input of phase discriminator, the output of phase discriminator with grid bias circuit connects, grid bias circuit with the grid of power amplifier tube is connected.
The control unit is connected with the microwave source, and sends a microwave source adjusting signal to the microwave source according to the frequency adjusting requirement of the system on the output signal of the oscillator, and the microwave source sends a corresponding microwave frequency modulation signal to the phase discriminator after receiving the microwave source adjusting signal; the phase discriminator receives microwave frequency modulation signals sent by the microwave source and microwave signals output by the drain electrode of a part of power amplifying tube, identifies the phase difference between the two signals, determines the adjusting range of the grid electrode voltage of the oscillator according to the phase difference, and outputs a second grid electrode power supply adjusting signal to the grid electrode bias circuit so as to enable the frequency of the microwave signals output by the drain electrode of the power amplifying tube to be consistent with the frequency of the microwave frequency modulation signals sent by the microwave source. Therefore, the technical problem that the frequency of a microwave signal is not adjustable due to a magnetron mechanism in the prior art is solved.
Further, the grid of the power amplifier tube is connected with the grid power supply adjusting circuit/the grid biasing circuit through a loop filter circuit.
The loop filter circuit filters signals before being input into the grid power supply adjusting circuit/the second grid power supply adjusting circuit, interference signals are filtered, the filtered signals are input into the grid of the power amplifying tube, the filter filters the interference signals, the power supply signals input into the grid of the power amplifying tube are accurate, and the frequency of microwave signals output by the drain electrode is closer to microwave frequency modulation signals of the microwave source.
Further, the microwave source is a voltage controlled oscillator circuit.
Further, the microwave source is a phase-locked loop circuit. The phase-locked loop circuit can be realized by a phase-locked loop, or can be realized by a phase-locked loop frequency multiplier or a phase-locked loop frequency divider.
And the output end of the drain power supply regulating circuit is connected with the drain of the power amplifying tube through the drain biasing circuit. The microwave signal power output by the power amplifier tube is determined by the drain voltage of the power amplifier tube, and the drain voltage is adjusted through the drain bias circuit, so that the adjusting effect is better and more accurate.
Furthermore, the power amplifier tube is formed by connecting a plurality of power amplifier tubes in parallel. Because the maximum output power of the microwave signal is determined by the saturation power of the power amplification tube under the maximum drain electrode working voltage, when the saturation power of a single power amplification tube is not large enough, a plurality of power amplification tubes can be connected in parallel to increase the saturation power.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) the oscillator is designed by combining the power amplifier tube and the feedback circuit, the output signal frequency of the oscillator is determined by the grid voltage of the power amplifier tube, and the maximum output power is determined by the saturation power of the power amplifier tube under the maximum drain electrode working voltage. Therefore, when the saturation power of the power amplifying tube is large enough, medium and high power microwaves can be realized. Furthermore, the power and the frequency of the microwave signal can be adjusted by utilizing the control unit, and the power amplifier tube only needs to be a 1-level power amplifier tube, so that medium-power and high-power microwaves can be generated, the volume and the area of the whole device are reduced, the cost is greatly reduced, the frequency and the power of the generated microwave signal can be adjusted, application circuits can be realized through hardware, the realization is simple, and the application requirements of different fields can be met;
(2) the phase difference between the microwave frequency modulation signal emitted by the microwave source and the microwave signal output by the power amplifying tube is adjusted by the phase discriminator, so that the frequency of the microwave signal output by the power amplifying tube and the frequency of the frequency modulation signal emitted by the microwave source can reach the same error.
Drawings
Fig. 1 is a schematic circuit diagram of a conventional architecture for generating medium and high power microwave signals in the prior art.
Fig. 2 is a schematic circuit diagram of a voltage-controlled oscillator device with adjustable power according to embodiment 1 of the present invention.
Fig. 3 is a schematic circuit diagram of a voltage-controlled oscillator device capable of adjusting power frequency according to embodiment 2 of the present invention.
Fig. 4 is a schematic circuit diagram of a solid-state microwave generating device according to embodiment 3 of the present invention.
Detailed Description
The drawings of the present invention are for illustration purposes only and are not to be construed as limiting the invention. For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Example 1
As shown in fig. 2, the present embodiment provides a voltage-controlled oscillator device with adjustable power, which can be applied to any applicable circuit unit and system, which are collectively referred to as "system" hereinafter in embodiment 1. The device comprises a power supply 12, a power amplifier tube 1, a feedback circuit 2, a drain electrode power supply regulating circuit 3 and a control unit 4.
The grid electrode of the power amplifying tube 1 is connected with the feedback circuit 2, the feedback circuit 2 is connected with the drain electrode of the power amplifying tube 1, and therefore the drain electrode of the power amplifying tube 1 is connected with the grid electrode; the output end of the drain power supply regulating circuit 3 is connected with the drain of the power amplifying tube 1, the control unit 4 is connected with the drain power supply regulating circuit 3, and the power supply 12 supplies power to the drain of the power amplifying tube 1 through the drain power supply regulating circuit 3.
The power amplifier tube 1 and the feedback circuit 2 form a voltage-controlled oscillator, and the control unit 4 is used for outputting a drain power supply adjusting signal to the drain power supply adjusting circuit 3 according to the requirement of a system on the power of an output signal of the oscillator; and the drain power supply adjusting circuit 3 adjusts the drain voltage of the power amplifying tube 1 according to the received drain power supply adjusting signal.
The voltage-controlled oscillator device with adjustable power provided by this embodiment is designed as a voltage-controlled oscillator by combining the feedback circuit 2 and the power amplifier tube 1, and the maximum power output by the oscillator is determined by the saturation power of the power amplifier tube 2 under the maximum drain operating voltage. Therefore, when the system needs power adjustment, the control unit 4 sends a drain power supply adjustment signal to the drain power supply adjustment circuit 3 connected with the control unit for adjustment, and the drain power supply adjustment circuit 3 adjusts the drain power supply of the power amplification tube 1 according to the signal to adjust the output power; in a specific implementation process, the drain of the power amplifier tube 1 may obtain power from the power supply 12 through the drain power supply adjusting circuit 3, the power supply 12 may further supply power to the control unit 4, and after the drain power supply adjusting circuit 3 receives a drain power supply adjusting signal output by the control unit 4, the drain power supply adjusting circuit adjusts the voltage of the power supply 12, preferably the power supply, where the drain power supply adjusting signal is a voltage adjusting signal to adjust the drain voltage of the power amplifier tube. According to P ═ U2The following can be found in the formula,/2R: when the voltage is reducedThe power decreases exponentially with voltage. Therefore, when the system needs power adjustment, the control unit 4 outputs a drain supply adjustment signal to the drain supply adjustment circuit 3, and the output voltage of the circuit changes along with the change, so that the output power of the oscillator formed by the power amplifier tube 1 changes along with the change. In practical applications, the drain power supply adjusting circuit 3 may be designed separately as a stand-alone unit or integrated into a power supply of the device.
The solid-state microwave of this embodiment utilizes feedback circuit and 1 level power amplifier tube can produce medium, high power's microwave signal, and can adjust the power of microwave signal, and device volume and area are all less, and greatly reduced the cost, and the microwave signal power that produces is adjustable, satisfies the application needs in different fields.
Preferably, the power amplifier tube 1 may be formed by connecting a plurality of power amplifier tubes in parallel. Since the maximum output power of the microwave signal is determined by the saturation power of the power amplifier tube under the maximum drain working voltage, when the saturation power of a single power amplifier tube 1 is not large enough, a plurality of power amplifier tubes can be connected in parallel to increase the saturation power.
Example 2
As shown in fig. 3, the present embodiment provides a voltage-controlled oscillator device that can adjust a power frequency, which can be applied to any applicable circuit unit and system, which are collectively referred to as "system" hereinafter in embodiment 1. The device comprises a power amplifier tube 1, a feedback circuit 2, a drain electrode power supply regulating circuit 3, a control unit 4, a grid electrode power supply regulating circuit 5 and a power supply 12.
The grid electrode of the power amplifying tube 1 is connected with the feedback circuit 2, the feedback circuit 2 is connected with the drain electrode of the power amplifying tube 1, and therefore the drain electrode of the power amplifying tube 1 is connected with the grid electrode; the output end of the drain power supply adjusting circuit 3 is connected with the drain electrode of the power amplifying tube 1, the control unit 4 is connected with the drain power supply adjusting circuit 3 and also connected with the grid power supply adjusting circuit 5, the grid power supply adjusting circuit 5 is connected with the grid electrode of the power amplifying tube 1, the power supply 12 supplies power to the drain electrode of the power amplifying tube 1 through the drain power supply adjusting circuit 3, and the power supply 12 supplies power to the grid electrode of the power amplifying tube 1 through the grid power supply adjusting circuit 5.
The power amplifier tube 1 and the feedback circuit 2 form a voltage-controlled oscillator, and the control unit 4 is used for outputting a drain power supply adjusting signal to the drain power supply adjusting circuit 3 according to the requirement of a system on the power of an output signal of the oscillator; the drain power supply adjusting circuit 3 adjusts the drain voltage of the power amplifying tube 1 according to the received drain power supply adjusting signal; the control unit 4 is used for outputting a first grid power supply adjusting signal to the grid power supply adjusting circuit 5 according to the frequency requirement of the system on the output signal of the oscillator; the grid power supply adjusting circuit 5 adjusts the grid voltage of the power amplifying tube 1 according to the received first grid power supply adjusting signal.
The voltage-controlled oscillator device capable of adjusting the power frequency provided by the embodiment is designed as a voltage-controlled oscillator by combining the feedback circuit 2 and the power amplifier tube 1, the maximum power output by the oscillator is determined by the saturation power of the power amplifier tube 2 under the maximum drain operating voltage, and the output signal frequency of the oscillator is determined by the gate voltage of the power amplifier tube 1.
Therefore, when the system needs power adjustment, the control unit 4 sends a drain power supply adjustment signal to the drain power supply adjustment circuit 3 connected with the control unit for adjustment, and the drain power supply adjustment circuit 3 adjusts the drain power supply of the power amplification tube 1 according to the signal to adjust the output power; in a specific implementation process, the drain of the power amplifier tube 1 may obtain power from the power supply 12 through the drain power supply adjusting circuit, the power supply 12 may also supply power to the control unit 4, and after the drain power supply adjusting circuit 3 receives the drain power supply adjusting signal output by the control unit 4, the voltage of the power supply 12, preferably the power supply 12, is adjusted, that is, the drain voltage of the power amplifier tube is adjusted. According to P ═ U2The following can be found in the formula,/2R: as the voltage decreases, the power decreases exponentially with the voltage. Therefore, when the system needs power adjustment, the control unit 4 outputs a drain power supply adjusting signal to the drain power supply adjusting circuit 3, the output voltage of the circuit changes along with the change, and the output power of the oscillator formed by the power amplifying tube 1 follows along with the changeAnd (4) changing. In practical applications, the drain power supply adjusting circuit 3 may be designed separately as a stand-alone unit or integrated into a power supply of the device.
When the system needs frequency adjustment, the control unit 4 sends a first gate power supply adjustment signal to the gate power supply adjustment circuit 5, and the gate power supply adjustment circuit 5 adjusts the gate voltage according to the signal after receiving the first gate power supply adjustment signal, so as to adjust the frequency of the output signal of the oscillator. In a specific implementation process, the gate of the power amplifier tube 1 may be powered by a power supply, and after receiving the first gate power supply adjustment signal output by the control unit 4, the gate power supply adjustment circuit 5 adjusts the voltage input by the power supply to the gate power supply adjustment circuit 5, that is, adjusts the gate voltage of the power amplifier tube.
The solid-state microwave of this embodiment utilizes feedback circuit and 1 level power amplifier tube can produce medium, high power's microwave signal, and can adjust the power of microwave signal, and device volume and area are all less, and greatly reduced the cost, and the microwave signal frequency and the power that produce all can be adjusted, satisfy the application needs in different fields.
Preferably, the power amplifier tube 1 may be formed by connecting a plurality of power amplifier tubes in parallel. Since the maximum output power of the microwave signal is determined by the saturation power of the power amplifier tube under the maximum drain working voltage, when the saturation power of a single power amplifier tube 1 is not large enough, a plurality of power amplifier tubes can be connected in parallel to increase the saturation power.
Example 3
As shown in fig. 4, the present embodiment provides a solid-state microwave generating device that can be applied to any suitable circuit unit and system, which will be collectively referred to as "system" hereinafter in embodiment 3. The device comprises a power amplifier tube 1, a feedback circuit 2, a drain electrode bias circuit 11, a drain electrode power supply adjusting circuit 3, a grid electrode bias circuit 7, a control unit 4, a microwave source 8, a phase discriminator 9, a loop filter circuit 10 and a power supply 12.
The drain electrode of the power amplifying tube 1 is connected with the feedback circuit 2, the feedback circuit 2 is connected with the grid electrode of the power amplifying tube 1, the drain electrode of the power amplifying tube 1 is connected with the drain electrode bias circuit 11, the drain electrode bias circuit 11 is connected with the drain electrode power supply regulating circuit 3, the control unit 4 is connected with the first output end of the drain electrode power supply regulating circuit 3, the second output end of the drain electrode power supply regulating circuit 3 is connected with the power supply 12 to supply power for the drain electrode of the power amplifying tube 1, and the control unit 4 is connected with the microwave source 8; the grid of the power amplifier tube 1 is connected with a grid bias circuit 7, and the grid bias circuit 7 is connected with a loop filter circuit 10; the microwave source 8 is connected with a phase detector 9, the phase detector 9 is connected with a loop filter circuit 10, and the phase detector 9 is also connected with the drain electrode of the power amplifying tube 1; the power supply 12 supplies power to the drain of the power amplifier tube 1 through the second output terminal of the drain power supply adjusting circuit 3, supplies power to the control unit 4 through the first output terminal, and supplies power to the gate bias circuit 76 through the third output terminal.
The control unit 4 is used for outputting a drain power supply adjusting signal to the drain power supply adjusting circuit 3 and outputting a microwave source adjusting signal to the microwave source 8 according to the requirements of the system on the frequency and the power of the output signal of the oscillator; the drain power supply adjusting circuit 3 outputs a drain power supply adjusting signal to the drain bias circuit 11, the drain bias circuit 11 adjusts the drain voltage of the power amplifying tube 1 after receiving the signal, the output signal of the oscillator is output through the drain of the power amplifying tube 1, and part of the output signal is output to the phase discriminator 9. Specifically, the phase detector 9 is connected to the drain of the power amplifier tube 1 through a sampling circuit, and the sampling circuit samples a small portion of the microwave signal output from the drain of the power amplifier tube 1 and outputs the sampled microwave signal to the phase detector.
After receiving the microwave source adjusting signal output by the control unit 4, the microwave source 8 outputs a microwave frequency modulation signal to the phase discriminator 8 according to the microwave source adjusting signal, extracts a part of samples from the output signal of the drain of the power amplifying tube 1 and outputs the samples to the phase discriminator 9, at this time, the phase discriminator 9 determines the phase difference between the microwave frequency modulation signal received from the microwave source 1 and the samples, and outputs a signal to the loop filter circuit 9 according to the phase difference, and the loop filter circuit 9 filters an interference signal in the signal and outputs the signal to the gate bias circuit 7 to adjust the gate voltage.
The solid-state microwave generating device provided by this embodiment is designed as a voltage-controlled oscillator by combining the feedback circuit 2 and the power amplifier tube 1, the output signal frequency of the oscillator is determined by the gate voltage of the power amplifier tube 1, and the maximum output power is determined by the saturation power of the power amplifier tube 1 under the maximum drain operating voltage.
Therefore, when the system needs power adjustment, the control unit 4 sends a drain power supply adjustment signal to the drain power supply adjustment circuit 3 connected with the control unit for adjustment, the drain power supply adjustment circuit 3 provides bias voltage to the drain of the power amplification tube 1 in combination with the drain bias circuit 11, so that the drain power supply of the power amplification tube 1 is adjusted to adjust the power of the output signal of the oscillator, and the microwave signal output by the power amplification tube 1 is output through the drain thereof; in a specific implementation process, the drain of the power amplifier tube 1 may obtain power from the power supply through the drain power supply adjusting circuit 3, and after the drain power supply adjusting circuit 3 receives the drain power supply adjusting signal output by the control unit 4, the drain power supply adjusting circuit adjusts the voltage of the power supply 12, preferably the power supply 12, that is, adjusts the drain voltage of the power amplifier tube 1. According to P ═ U2The following can be found in the formula,/2R: as the voltage decreases, the power decreases exponentially with the voltage. Therefore, when the system needs power adjustment, the control unit 4 outputs a drain supply adjustment signal to the drain supply adjustment circuit 3, and the output voltage of the circuit changes along with the change, so that the output power of the oscillator formed by the power amplifier tube 1 changes along with the change. In practical applications, the drain power supply adjusting circuit 3 may be designed separately as a stand-alone unit or integrated into a power supply of the device.
When the system needs frequency adjustment, the control unit 4 sends a microwave source adjustment signal to the microwave source 8, after the microwave source 8 receives the microwave source adjustment signal output by the control unit 4, the microwave source adjustment signal outputs a microwave frequency modulation signal to the phase discriminator 9 according to the microwave source adjustment signal, a part of samples are extracted from the output signal of the drain electrode of the power amplification tube 1 and output to the phase discriminator 9, the phase discriminator 9 at this time determines the phase difference between the microwave frequency modulation signal received from the microwave source 1 and the samples, and outputs a signal to the loop filter circuit 9 according to the phase difference, the loop filter circuit 9 filters interference signals in the signal and outputs the interference signals to the gate bias circuit 7 to adjust the gate voltage, so that the frequency of the microwave signal output by the drain electrode of the power amplification tube 1 is consistent with the frequency of the microwave frequency modulation signal sent by the microwave source 8; the loop filter circuit 9 filters the interference signal, so that the frequency of the microwave signal output by the drain of the power amplifier tube 1 is closer to the microwave frequency modulation signal of the microwave source 1.
The solid-state microwave generating device of the embodiment can generate microwave signals with medium and high power by utilizing the feedback circuit and the 1-level power amplifier tube 1, can adjust the frequency and the power of the microwave signals, has smaller volume and area, and greatly reduces the cost; no matter the adjustment of the output power of the microwave signal or the adjustment of the frequency of the microwave signal, the control unit 5 sends out a microwave source adjustment signal and a drain electrode power supply adjustment signal to different elements for monitoring and management, so that the device is favorable for more accurately adjusting the power and the frequency of the microwave signal; compared with embodiments 1 and 2, in embodiment 3, the phase difference between the microwave frequency modulation signal emitted by the microwave source 8 and the microwave signal output by the power amplification tube 1 is adjusted by the phase discriminator 9, so that the frequency of the microwave signal output by the power amplification tube 1 and the frequency of the microwave frequency modulation signal emitted by the microwave source 8 are consistent with each other with smaller error; in addition, in embodiment 3, the gate bias circuit 7 adjusts the gate voltage, and the drain bias circuit 11 adjusts the drain voltage, so that the adjustment effect is better and more accurate.
Preferably, the power amplifier tube 1 may be formed by connecting a plurality of power amplifier tubes in parallel. Since the maximum output power of the microwave signal is determined by the saturation power of the power amplifier tube 1 under the maximum drain electrode working voltage, when the saturation power of a single power amplifier tube is not large enough, a plurality of power amplifier tubes can be connected in parallel to increase the saturation power.
Preferably, the microwave source 8 comprises a voltage controlled oscillator circuit or a phase locked loop circuit. The phase-locked loop circuit can be realized by a phase-locked loop, or can be realized by a phase-locked loop frequency multiplier or a phase-locked loop frequency divider.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not limitations to the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims (10)
1. A solid-state microwave generating device is characterized by comprising a power supply, a power amplifier tube, a drain electrode power supply regulating circuit, a feedback circuit and a control unit;
the first input end of the drain electrode power supply regulating circuit is connected with the control unit, the second input end of the drain electrode power supply regulating circuit is connected with a power supply, the output end of the drain electrode power supply regulating circuit is connected with the drain electrode of the power amplifying tube, and the drain electrode of the power amplifying tube is connected with the grid electrode of the power amplifying tube through the feedback circuit;
the drain electrode of the power amplifying tube is used for outputting a microwave signal;
the power supply also supplies power to the control unit.
2. The solid-state microwave generating device according to claim 1, further comprising a gate power supply regulating circuit, wherein the control unit is further connected to a first input terminal of the gate power supply regulating circuit, a power supply is connected to a second input terminal of the gate power supply regulating circuit, and an output terminal of the gate power supply regulating circuit is connected to the gate of the power amplifying tube.
3. The solid-state microwave generating device according to claim 1, further comprising a gate bias circuit, a phase detector and a microwave source, wherein an input end of the microwave source is connected to the control unit, an output end of the microwave source is connected to an input end of the phase detector, an input end of the phase detector is further connected to a drain of the power amplifying tube, an output end of the phase detector is connected to the gate bias circuit, and the gate bias circuit is connected to a gate of the power amplifying tube.
4. A solid state microwave generating device as claimed in claim 2, wherein the gate of the power amplifier tube is connected to a loop filter circuit through the gate supply regulation circuit.
5. A solid state microwave generating device as claimed in claim 3, wherein the gate of the power amplifier tube is connected to a loop filter circuit via the gate bias circuit.
6. A solid state microwave generating device according to claim 3, wherein the microwave source is a voltage controlled oscillator circuit.
7. A solid state microwave generating apparatus as claimed in claim 3, wherein the microwave source is a phase locked loop circuit.
8. A solid state microwave generating device according to claim 7, wherein the phase locked loop circuit comprises a phase locked loop, or comprises a phase locked loop and a frequency multiplier, or comprises a phase locked loop and a frequency divider.
9. A solid state microwave generating device according to any one of claims 1 to 5, further comprising a drain bias circuit, wherein the output terminal of the drain power supply regulating circuit is connected to the drain of the power amplifier tube via the drain bias circuit.
10. A solid state microwave generating device according to any one of claims 1 to 5, wherein the power amplifying tube is formed by connecting a plurality of power amplifying tubes in parallel.
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| CN201922501899.6U CN211239794U (en) | 2019-12-31 | 2019-12-31 | Solid-state microwave generating device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111130470A (en) * | 2019-12-31 | 2020-05-08 | 京信通信系统（中国）有限公司 | Solid-state microwave generating device |
| CN113093614A (en) * | 2021-04-02 | 2021-07-09 | 北京航天雷特机电工程有限公司 | Microwave generating circuit and microwave generating device |
| JP7448262B2 (en) | 2021-04-02 | 2024-03-12 | 北京航天雷特机電工程有限公司 | Microwave generation circuit and microwave generator |
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2019
- 2019-12-31 CN CN201922501899.6U patent/CN211239794U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111130470A (en) * | 2019-12-31 | 2020-05-08 | 京信通信系统（中国）有限公司 | Solid-state microwave generating device |
| CN111130470B (en) * | 2019-12-31 | 2023-10-20 | 京信网络系统股份有限公司 | Solid microwave generating device |
| CN113093614A (en) * | 2021-04-02 | 2021-07-09 | 北京航天雷特机电工程有限公司 | Microwave generating circuit and microwave generating device |
| CN113093614B (en) * | 2021-04-02 | 2022-07-15 | 北京航天雷特机电工程有限公司 | Microwave generating circuit and microwave generating device |
| JP7448262B2 (en) | 2021-04-02 | 2024-03-12 | 北京航天雷特机電工程有限公司 | Microwave generation circuit and microwave generator |
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