CN212730733U - Microwave solid-state power source circuit and microwave therapeutic instrument - Google Patents
Microwave solid-state power source circuit and microwave therapeutic instrument Download PDFInfo
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- CN212730733U CN212730733U CN202020427005.3U CN202020427005U CN212730733U CN 212730733 U CN212730733 U CN 212730733U CN 202020427005 U CN202020427005 U CN 202020427005U CN 212730733 U CN212730733 U CN 212730733U
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- 230000001225 therapeutic effect Effects 0.000 title abstract description 10
- 239000013078 crystal Substances 0.000 claims abstract description 48
- 239000007787 solid Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 abstract description 9
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000087 stabilizing effect Effects 0.000 description 18
- 238000010586 diagram Methods 0.000 description 14
- 238000002560 therapeutic procedure Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 208000003656 Electric Burns Diseases 0.000 description 1
- 206010053615 Thermal burn Diseases 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
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- 238000000015 thermotherapy Methods 0.000 description 1
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Abstract
The utility model discloses a microwave solid-state power source circuit, including reference crystal oscillator, the phase-locked loop of being connected with reference crystal oscillator, the output circuit who is connected with the phase-locked loop, and the controller of being connected with the phase-locked loop, wherein, provide reference signal for the phase-locked loop circuit by reference crystal oscillator, the register of driving the phase-locked loop by the controller again generates target microwave signal according to reference signal, through output circuit output target microwave signal, utilize the characteristics that the phase-locked loop can stabilize output frequency, make microwave signal convert the transmission in-process that keeps frequency stability for target microwave signal and output, thereby obtain stable target microwave signal, the quality of output microwave signal has been promoted, user experience has been optimized. The utility model also discloses a microwave therapeutic instrument has above-mentioned beneficial effect.
Description
Technical Field
The utility model relates to an electronic circuit technical field, in particular to microwave solid state power source circuit and microwave therapeutic instrument.
Background
Microwave refers to electromagnetic waves with frequencies ranging from 300MHz to 300GHz, and medical workers have discovered the biological effect of microwave in the 30's of the 20 th century. Clinically, the interaction between microwaves and organisms can be divided into two broad categories, namely microwave heating effect and non-microwave heating effect. The microwave thermotherapy adopted by the microwave therapeutic apparatus is a non-contact heating mode, and the possibility of thermal burn and electric burn caused by electric contact is avoided.
Microwave solid state circuits are key components in microwave therapy devices. The microwave solid-state circuit adopts a magnetron as a core element to realize the function of generating the needed microwave, and the switch of the magnetron is controlled by a singlechip controller to directly act on an output electrode. However, the magnetron has the problems of large volume, serious heat generation, large influence of output along with temperature rise and the like, so that the frequency and power of output microwave signals are unstable, and the use effect is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a microwave solid state power source circuit and microwave therapy appearance for provide the microwave signal of frequency stability.
In order to solve the above technical problem, the present invention provides a microwave solid state power source circuit, which includes a reference crystal oscillator, a phase-locked loop connected to the reference crystal oscillator, an output circuit connected to the phase-locked loop, and a controller connected to the phase-locked loop;
the controller is used for driving a register of the phase-locked loop to generate a target microwave signal according to the reference signal and outputting the target microwave signal through the output circuit.
Optionally, the reference crystal oscillator is specifically a constant temperature crystal oscillator.
Optionally, the reference crystal oscillator is specifically a 40MHz crystal oscillator.
Optionally, the phase-locked loop is specifically an LTC6946IUFD-1 chip.
Optionally, the digital signal processing circuit further comprises a first attenuator arranged between the reference crystal oscillator and the phase-locked loop, and a second attenuator arranged between the phase-locked loop and the output circuit.
Optionally, the first attenuator and the second attenuator are both specifically PI attenuators.
Optionally, the digital signal processing circuit further comprises a first amplifier arranged between the reference crystal oscillator and the phase-locked loop, and a second amplifier arranged between the phase-locked loop and the output circuit.
Optionally, a low pass filter is provided between the phase locked loop and the output circuit.
Optionally, the controller is specifically a field programmable gate array FPGA.
In order to solve the above technical problem, the utility model also provides a microwave therapeutic apparatus, including above-mentioned arbitrary microwave solid state power source circuit.
The utility model provides a microwave solid-state power source circuit, including reference crystal oscillator, the phase-locked loop of being connected with reference crystal oscillator, the output circuit who is connected with the phase-locked loop, and the controller of being connected with the phase-locked loop, wherein, provide reference signal for the phase-locked loop circuit by reference crystal oscillator, the register of driving the phase-locked loop by the controller again generates target microwave signal according to reference signal, through output circuit output target microwave signal, utilize the characteristics that the phase-locked loop can stabilize output frequency, make microwave signal convert the transmission in-process that keeps the frequency stability of target microwave signal and output, thereby obtain stable target microwave signal, the quality of output microwave signal has been promoted, user experience has been optimized. The utility model also provides a microwave therapeutic instrument has above-mentioned beneficial effect, no longer gives unnecessary details here.
Drawings
In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious to those skilled in the art that other drawings can be obtained from the drawings without inventive work.
Fig. 1 is a schematic structural diagram of a microwave solid-state power source circuit according to an embodiment of the present invention;
fig. 2(a) is a circuit diagram of a reference crystal oscillator and a first attenuator section according to an embodiment of the present invention;
fig. 2(b) is a circuit diagram of a phase-locked loop, a second amplifier, a second attenuator, and a low-pass filter according to an embodiment of the present invention;
fig. 2(c) is a circuit diagram of a first voltage stabilizing circuit portion according to an embodiment of the present invention;
fig. 2(d) is a circuit diagram of a second voltage stabilizing circuit portion according to an embodiment of the present invention;
fig. 2(e) is a circuit diagram of a third voltage stabilizing circuit portion according to an embodiment of the present invention;
fig. 2(f) is a circuit diagram of a controller portion according to an embodiment of the present invention.
Detailed Description
The core of the utility model is to provide a microwave solid-state power source circuit and microwave therapeutic instrument for provide the microwave signal of frequency stability.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a microwave solid-state power source circuit according to an embodiment of the present invention.
As shown in fig. 1, a microwave solid-state power source circuit provided by the embodiment of the present invention includes a reference crystal oscillator 101, a phase-locked loop 102 connected to the reference crystal oscillator 101, an output circuit 103 connected to the phase-locked loop 102, and a controller 104 connected to the phase-locked loop 102;
the reference crystal 101 is configured to provide a reference signal to the pll 102 circuit, and the controller 104 is configured to drive a register of the pll 102 to generate a target microwave signal according to the reference signal, and output the target microwave signal through the output circuit 103.
In specific implementation, the embodiment of the present invention adopts the reference crystal oscillator 101 to generate the reference signal, and then the register of the phase-locked loop 102 is configured by the controller 104, so as to control the phase-locked loop 102 to generate the target microwave signal, and compared with the magnetron in the prior art, the magnetron can be less susceptible to environmental impact, thereby ensuring the stability of the frequency of the output signal.
The reference crystal oscillator 101 may be a constant temperature crystal oscillator. The reference crystal oscillator 101 may be a 40MHz crystal oscillator.
The phase locked loop 102 may specifically employ LTC6946IUFD-1 chip.
The controller 104 may specifically employ a field programmable gate array FPGA or a complex programmable logic device CPLD.
Further, in order to avoid the interference of the back-end circuit signal to the front-end circuit, the embodiment of the present invention provides a microwave solid-state power source circuit, which further includes a first attenuator 105 disposed between the reference crystal 101 and the phase-locked loop 102, and a second attenuator 106 disposed between the phase-locked loop 102 and the output circuit 103.
Wherein, the first attenuator 105 and the second attenuator 106 may both adopt PI attenuators.
In addition, since the reference crystal 101 needs to generate a reference signal for driving the pll 102, the reference signal of the pll 102 needs to satisfy certain power requirements. If the reference crystal oscillator 101 is a crystal oscillator, the driving condition of the phase-locked loop 102 cannot be satisfied. Therefore, the embodiment of the present invention provides a microwave solid-state power source circuit, which further includes a first amplifier 107 disposed between the reference crystal 101 and the phase-locked loop 102. The first amplifier 107 is selected to be a proper multiple according to the power of the reference signal generated by the reference crystal 101 and the driving signal required by the phase-locked loop 102.
Further, the embodiment of the present invention provides a microwave solid-state power source circuit, which further includes a second amplifier 108 disposed between the phase-locked loop 102 and the output circuit 103.
If an attenuator and an amplifier are provided at the same time, the first attenuator 105 is provided between the reference crystal 101 and the first amplifier 107, and the second attenuator 106 is provided between the second amplifier 108 and the output circuit 103.
In practical application, the second amplifier 108 with a proper multiple is selected according to the application scenario (such as the size of a required target microwave signal) of the microwave solid-state power source circuit and the model of the adopted components.
In order to improve the output signal quality, the embodiment of the utility model provides a microwave solid-state power source circuit is still including locating low pass filter 109 between phase-locked loop 102 and output circuit 103 for higher harmonic signal in the filtering microwave signal, thereby further obtain stable target microwave signal.
In the output circuit 103, a power amplifier may be provided for further amplifying the power of the microwave signal according to actual needs.
The embodiment of the utility model provides a microwave solid-state power source circuit, including reference crystal oscillator, the phase-locked loop of being connected with reference crystal oscillator, output circuit who is connected with the phase-locked loop, and the controller of being connected with the phase-locked loop, wherein, provide reference signal for phase-locked loop circuit by reference crystal oscillator, the register of driving the phase-locked loop by the controller again generates target microwave signal according to reference signal, through output circuit output target microwave signal, utilize the phase-locked loop can stabilize the characteristics of output frequency, make microwave signal convert the transmission in-process that target microwave signal and output and keep frequency stable, thereby obtain stable target microwave signal, the quality of output microwave signal has been promoted, user experience has been optimized.
On the basis of the above embodiment, the embodiment of the utility model provides a concrete implementation circuit of microwave solid-state power source circuit, this circuit produces 40MHz microwave signal through consulting the crystal oscillator, exports 2450 MHz's target microwave signal. For viewing conveniently, the microwave solid-state power source circuit provided by the embodiment of the present invention is split into the following six parts.
Fig. 2(a) is a circuit diagram of a reference crystal oscillator and a first attenuator section according to an embodiment of the present invention; fig. 2(b) is a circuit diagram of a phase-locked loop, a second amplifier, a second attenuator, and a low-pass filter according to an embodiment of the present invention; fig. 2(c) is a circuit diagram of a first voltage stabilizing circuit portion according to an embodiment of the present invention; fig. 2(d) is a circuit diagram of a second voltage stabilizing circuit portion according to an embodiment of the present invention; fig. 2(e) is a circuit diagram of a third voltage stabilizing circuit portion according to an embodiment of the present invention; fig. 2(f) is a circuit diagram of a controller portion according to an embodiment of the present invention.
As shown in fig. 2(a), the reference crystal oscillator generates a 40MHz reference signal from the crystal oscillator U11, outputs a 0dBm microwave signal through the 3 pin of the crystal oscillator U11, changes the signal into a-6 dBm microwave signal through the resistor R44, and enters the first attenuator.
The first attenuator consists of resistors R42, R43, R38, R39, R45, R46, R47 and R49 and is used for isolating the reference crystal oscillator and a back-end circuit, the output is divided into two paths, one path enters an amplifier U35 to be amplified to obtain a microwave signal which is 40MHz and is more than +14dBm, and the microwave signal is input into a controller, and the controller adopts an FPGA chip; and the other path of the microwave signal enters a first amplifier U12 after passing through an LC filter, the power is +17dBm at the moment, the microwave signal of 40MHz is output through a capacitor C55 and serves as a reference signal of the phase-locked loop, and the power range of the signal is between-5 dBm and +5dBm at the moment.
As shown IN FIG. 2(b), a 40MHz reference signal is inputted to the REF + pin of the phase-locked loop chip U17, the STAT pin of the phase-locked loop chip is connected to the STAT-6946 pin of the FPGA chip through a resistor R50, the CS pin of the phase-locked loop chip is connected to the CS-6946 pin of the FPGA chip through a resistor R51, the SCLK pin of the phase-locked loop chip is connected to the SCLK-6946 pin of the FPGA chip through a resistor R52, the SDI pin of the phase-locked loop chip is connected to the SDI-6946 pin of the FPGA chip through a resistor R53, the RF-pin of the phase-locked loop chip is outputted through an RC circuit to obtain a microwave signal with a power of-5 dBm, and then the microwave signal enters the IN pin of the low-pass filter FZ2 to filter out higher harmonic signals (i.e. filtering out signals with a power of-0.5 dBm/33 dBm) smaller than 4.9GHz and 7.35GHz IN the, And a second attenuator consisting of a capacitor C62, a resistor R58, an inductor L15, a capacitor C64, a resistor R83, a resistor R84 and a resistor R86 is used for obtaining a 2450MHz signal, and the signal enters the output circuit.
As shown in fig. 2(c), a first voltage stabilizing circuit is built through an 800mA voltage stabilizing chip U20, the input end of a voltage stabilizing chip U20 is connected with a +5.5VD power supply, and the output end of a voltage stabilizing chip U20 provides a +5V _2 power supply to supply power to ERA-51SM +.
As shown in fig. 2(d), a second voltage stabilizing circuit is built through a 150mA voltage stabilizing chip U19, the input end of the voltage stabilizing chip U19 is connected to the +5V _2 power supply in fig. 2(c), and the output end of the voltage stabilizing chip U19 provides +3VJ voltage for the reference crystal oscillator in fig. 2 (a).
As shown in fig. 2(e), a third voltage stabilizing circuit is built through a 150mA voltage stabilizing chip U20, the input end of the voltage stabilizing chip U20 is connected to the +5V _2 power supply in fig. 2(c), and the output end of the voltage stabilizing chip U20 provides the +3.3VT power supply for the pll chip in fig. 2 (b).
As shown in fig. 2(f), the FPGA chip U44B is used as the controller, and the chip model is XC3S250E-4VQ100I, and the main pin connection relationship is described above with reference to fig. 2 (b).
The above details each embodiment that microwave solid state power source circuit corresponds, on this basis, the utility model discloses still disclose the microwave therapy appearance that corresponds with above-mentioned microwave solid state power source circuit.
The microwave solid-state power source circuit scheme and the specific implementation circuit thereof provided based on the above embodiments can be applied to a microwave therapeutic apparatus, and the above embodiments and combinations thereof can be specifically adopted. The microwave solid-state power source circuit provided by the embodiment can provide a stable 2450MHz microwave signal. Further, by providing a power amplifier in the output circuit, a desired output power is achieved. In addition, a plurality of groups of microwave solid-state power source circuits can be arranged and used for providing a plurality of microwave signal output channels for flexible use of users.
Since the embodiment of the microwave therapy apparatus portion corresponds to the embodiment of the microwave solid-state power source circuit portion, please refer to the description of the embodiment of the microwave solid-state power source circuit portion, and the detailed description thereof is omitted here for brevity.
The microwave solid-state power source circuit and the microwave therapeutic apparatus provided by the utility model are introduced in detail. The embodiments are described in a progressive manner, the emphasis of each embodiment is different from that of other embodiments, and the same and similar parts among the embodiments are referred to each other.
It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. A microwave solid-state power source circuit is characterized by comprising a reference crystal oscillator, a phase-locked loop connected with the reference crystal oscillator, an output circuit connected with the phase-locked loop, and a controller connected with the phase-locked loop;
the controller is used for driving a register of the phase-locked loop to generate a target microwave signal according to the reference signal and outputting the target microwave signal through the output circuit.
2. A microwave solid state power supply circuit according to claim 1, wherein the reference crystal oscillator is specifically a constant temperature crystal oscillator.
3. A microwave solid state power supply circuit according to claim 1, wherein the reference crystal oscillator is specifically a 40MHz crystal oscillator.
4. A microwave solid state power supply circuit as claimed in claim 1 wherein the phase locked loop is in particular an LTC6946IUFD-1 chip.
5. A microwave solid state power source circuit in accordance with claim 1 further comprising a first attenuator disposed between the reference crystal and the phase locked loop, and a second attenuator disposed between the phase locked loop and the output circuit.
6. A microwave solid state power source circuit according to claim 5 wherein the first attenuator and the second attenuator are each embodied as PI attenuators.
7. A microwave solid state power source circuit in accordance with claim 1 further comprising a first amplifier disposed between the reference crystal and the phase locked loop, and a second amplifier disposed between the phase locked loop and the output circuit.
8. A microwave solid state power source circuit in accordance with claim 1 further comprising a low pass filter disposed between the phase locked loop and the output circuit.
9. The microwave solid state power source circuit according to claim 1, wherein the controller is in particular a field programmable gate array, FPGA.
10. A microwave treatment apparatus comprising a microwave solid state power supply circuit according to any one of claims 1 to 9.
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| CN202020427005.3U CN212730733U (en) | 2020-03-27 | 2020-03-27 | Microwave solid-state power source circuit and microwave therapeutic instrument |
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| CN202020427005.3U CN212730733U (en) | 2020-03-27 | 2020-03-27 | Microwave solid-state power source circuit and microwave therapeutic instrument |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111228652A (en) * | 2020-03-27 | 2020-06-05 | 河南翔宇医疗设备股份有限公司 | Microwave solid-state power source circuit and microwave therapeutic instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111228652A (en) * | 2020-03-27 | 2020-06-05 | 河南翔宇医疗设备股份有限公司 | Microwave solid-state power source circuit and microwave therapeutic instrument |
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