Aerosol-forming device
By introducing absorbing microstrip lines and microstrip dual-directional coupling units into the aerosol forming device, the problems of high power consumption and large size are solved, realizing the miniaturization and low power consumption of the product and improving working efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2026-04-07
AI Technical Summary
Existing aerosol forming devices have high power consumption and large size, making it difficult to achieve miniaturization and low power consumption requirements. This is mainly due to the presence of circulators or isolators, which leads to power loss and increased product size.
Design an aerosol forming device by introducing an absorbing microstrip line and a microstrip dual directional coupling unit into the microwave amplification module to absorb microwave reflected signals and reduce power density, eliminating the need for a circulator or isolator, and employing a specific microstrip line width design to reduce reflection and power loss.
Without using circulators or isolators, the risk of power amplifier tube burnout is reduced, product efficiency is improved, and miniaturization and low power consumption are achieved.
Smart Images
Figure CN224084683U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electronic atomization, and in particular to an aerosol forming device. Background Technology
[0002] With the widespread adoption and popularization of wireless devices, people have an increasingly urgent need for smaller, more energy-efficient, and higher-performance electronic devices. Therefore, strong signal strength, low power consumption, and miniaturization have become the development trend for wireless devices.
[0003] In the field of electronic atomization, microwave heating, as a novel heating method, uses microwave radiation to heat and atomize the aerosol-forming matrix, offering advantages such as rapid heating and high safety and reliability. In aerosol forming devices, after the microwave generation module generates the microwave signal, the microwave heating module needs to amplify it, making the power amplifier tube an indispensable component. The quality of the power amplifier tube directly affects the signal strength and operational stability of the product.
[0004] In microwave heating modules, microwave signals are reflected, and the energy of the reflected signals returns to the power amplifier tube. Therefore, circulators or isolators are usually placed after the power amplifier tube to absorb the energy of these reflected signals and protect the power amplifier tube from damage. However, circulators are passive devices and have a certain power loss, which reduces the product's efficiency and increases its overall size, making it more difficult to achieve the requirements of miniaturization and low power consumption. Utility Model Content
[0005] The technical problem to be solved by this application is to provide an aerosol forming device that does not require the installation of a circulator or isolator, addressing the technical shortcomings of existing technologies such as high power consumption and large size.
[0006] The technical solution adopted by this application to solve its technical problem is as follows: An aerosol forming device is constructed, comprising a control module and a microwave generating module, a microwave amplification module, a microwave feeding module, and a microwave heating module connected in sequence. The microwave generating module generates a microwave output signal under the control of the control module. The microwave amplification module amplifies the power of the microwave output signal and feeds the amplified microwave output signal into the microwave heating module through the microwave feeding module. The microwave heating module heats the aerosol forming matrix. The microwave amplification module includes:
[0007] A power amplifier tube used to amplify the microwave output signal generated by the microwave generation module.
[0008] One end is connected to the drain terminal of the power amplifier tube and is used to transmit the microwave output signal amplified by the power amplifier tube to the output microstrip line of the microwave feed module.
[0009] An absorbing microstrip line is used to absorb microwave reflected signals on the output microstrip line, and one end of the absorbing microstrip line is connected to the drain terminal of the power amplifier tube.
[0010] Preferably, the width of the output microstrip line decreases along the transmission direction of the microwave output signal.
[0011] Preferably, the microwave amplification module further includes at least one of the following:
[0012] A first microstrip coupling unit is connected to the other end of the output microstrip line and is used to couple the microwave output signal.
[0013] A second microstrip coupling unit is connected to the other end of the output microstrip line and is used to couple microwave reflected signals.
[0014] Preferably, the first microstrip coupling unit and the second microstrip coupling unit are integrated into a microstrip dual-directional coupling unit, and the microstrip dual-directional coupling unit includes:
[0015] A transmission microstrip line is provided, with one end of the transmission microstrip line connected to the other end of the output microstrip line, and the other end of the transmission microstrip line connected to the microwave heating module through the microwave feed module.
[0016] Coupled microstrip line coupled to the transmission microstrip line;
[0017] A resistor, the first end of which is connected to the coupled microstrip line, and the second end of which is grounded.
[0018] Preferably, the edge shape of the coupling region between the coupling microstrip line and the transmission microstrip line is serrated or crenellated.
[0019] Preferably, the microwave amplification module further includes a microstrip feeding unit, which includes a feeding microstrip line and a decoupling capacitor. The first end of the feeding microstrip line is connected to the drain terminal of the power amplifier tube, and the second end of the feeding microstrip line is connected to a DC power supply. The first end of the decoupling capacitor is connected to the feeding microstrip line, and the second end of the decoupling capacitor is grounded. The length of the feeding microstrip line is related to 1 / 4 wavelength of the microwave signal at the operating frequency of the power amplifier tube.
[0020] Preferably, the microstrip power supply unit further includes a first filter capacitor, and the first filter capacitor is connected between the DC power supply and ground.
[0021] Preferably, the microwave amplification module further includes:
[0022] A coupling capacitor connected between the output microstrip line and the transmission microstrip line.
[0023] Preferably, the microwave amplification module further includes at least two second filter capacitors, with one end of each of the at least two second filter capacitors connected to different positions on the output microstrip line, and the other end of each of the at least two second filter capacitors grounded.
[0024] Preferably, the microwave amplification module further includes:
[0025] An input microstrip line is connected to the gate terminal of the power amplifier tube, and the width of the input microstrip line increases along the transmission direction of the microwave output signal.
[0026] According to the technical solution of this application, when signal reflection occurs, the energy generated by the microwave reflected signal reaches the power amplifier tube through the output microstrip line. However, due to the presence of the absorbing microstrip line, it can absorb the microwave reflected signal to a certain extent, making the power of the reflected microwave signal more dispersed and reducing the power density in the local area. Ultimately, the transmission of microwave energy has a certain degree of unidirectionality. Therefore, without setting a circulator or isolator, the microwave energy reflected to the power amplifier tube can also be reduced, thereby reducing the risk of the power amplifier tube burning out. Moreover, since there is no need to set a circulator or isolator, the power loss is reduced, the working efficiency of the product is improved, and the overall size of the product is reduced, achieving the requirements of miniaturization and low power consumption. Attached Figure Description
[0027] To more clearly illustrate the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:
[0028] Figure 1 This is a logic structure diagram of an aerosol forming apparatus in one embodiment of this application;
[0029] Figure 2 This is a simulated structural diagram of the microstrip line in the microwave amplification module of the aerosol forming apparatus in one embodiment of this application;
[0030] Figure 3 This is a physical schematic diagram of the microstrip line in the microwave amplification module of the aerosol forming apparatus in one embodiment of this application;
[0031] Figure 4 This is a schematic diagram of the PCB layout of the microwave amplification module of the aerosol forming apparatus in one embodiment of this application. Detailed Implementation
[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0033] Figure 1 This is a logical structure diagram of an aerosol forming apparatus according to an embodiment of this application. The aerosol forming apparatus of this embodiment includes a control module 40 and a microwave generating module 00, a microwave amplification module 10, a microwave feeding module 20, and a microwave heating module 30 connected in sequence. The microwave generating module 00 generates a microwave output signal under the control of the control module 40. The microwave amplification module 10 amplifies the power of the microwave output signal and feeds the amplified microwave output signal into the microwave heating module 30 through the microwave feeding module 20. The microwave heating module 30 heats the aerosol forming matrix.
[0034] Furthermore, in one embodiment, combined with Figure 2 , Figure 3 and Figure 4 The microwave amplification module includes a power amplifier tube 11, an output microstrip line 13, and an absorption microstrip line 14. The power amplifier tube 11 amplifies the microwave output signal generated by the microwave generation module (i.e., the microwave signal at the operating frequency of the power amplifier tube 11, for example, a microwave signal with a frequency band of 2 GHz to 8 GHz). One end of the output microstrip line 13 is connected to the drain terminal of the power amplifier tube 11 and is used to transmit the amplified microwave output signal to the microwave feed module 20. One end of the absorption microstrip line 14 is connected to the drain terminal of the power amplifier tube 11, and the other end is open, used to absorb the microwave reflected signal on the output microstrip line 13. Alternatively, in other embodiments, the other end of the absorption microstrip line 14 can be grounded via a capacitor.
[0035] Regarding the absorbing microstrip line 14, it should be noted that to ensure the absorbing microstrip line 14 absorbs only microwave reflected signals, it needs to have suitable parameters (e.g., material, linewidth, line length). For example, the length of the absorbing microstrip line 14 is 1 / 4 wavelength of the microwave signal at the operating frequency of the power amplifier tube 11, and its termination is open-circuited. In practical applications, the physical structure of the absorbing microstrip line 14 needs to be designed first, including material selection, linewidth, and line length determination. Then, the performance of the absorbing microstrip line 14 is predicted using simulation software, and its parameters are adjusted based on the simulation results to achieve the best absorption effect. After the design is completed, during the manufacturing process of the absorbing microstrip line 14, the parameters can be further fine-tuned based on processing errors and changes in material properties, and tests can be conducted to verify whether the absorbing microstrip line 14 meets the predetermined requirements.
[0036] Through the technical solution of this embodiment, when signal reflection occurs, the energy generated by the microwave reflected signal reaches the power amplifier tube via the output microstrip line. However, due to the presence of the absorbing microstrip line, it can absorb the microwave reflected signal to a certain extent, making the power of the reflected microwave signal more dispersed and reducing the power density in the local area. Ultimately, this makes the transmission of microwave energy somewhat unidirectional. Therefore, without setting a circulator or isolator, the microwave energy reflected to the power amplifier tube can be reduced, thereby reducing the risk of the power amplifier tube burning out. Moreover, since no circulator or isolator is required, power loss is reduced, the product's working efficiency is improved, and the overall size of the product is reduced, achieving the requirements of miniaturization and low power consumption.
[0037] Furthermore, in this embodiment, as Figures 2 to 4As shown, the width of the output microstrip line 13 decreases along the transmission direction of the microwave output signal, for example, decreasing in a stepped or tapered manner. Additionally, the microwave amplification module includes an input microstrip line 12 connected to the gate terminal of the power amplifier tube 11, and the width of the input microstrip line 12 increases along the transmission direction of the microwave output signal, for example, increasing in a stepped or inverted tapered manner. Regarding this embodiment, it should first be noted that since the internal output impedance of the power amplifier tube is smaller than the external line impedance (50 ohms), when designing the microwave amplification module, impedance matching is required for the drain and gate terminals of the power amplifier tube 11, depending on the tube's packaging structure. Furthermore, since the impedance of a microstrip line is primarily related to its width, and also to its thickness, the thickness of the line and the ground plane medium, and the dielectric constant of the dielectric, when the thickness of the microstrip line, the thickness of the line and the ground plane medium, and the dielectric constant of the dielectric are fixed, the closer the microstrip line is to the power amplifier tube, the larger its width, and the closer its impedance is to the internal impedance of the power amplifier; conversely, the farther away from the power amplifier tube, the smaller the width of the microstrip line, and the closer its impedance is to the external line impedance. Therefore, this design of varying widths for the output microstrip line 13 and the input microstrip line 12, on the one hand, reduces the possibility of reflection during microwave signal transmission, further reducing the risk of power amplifier tube burnout; on the other hand, it reduces microwave signal power loss and improves the additional efficiency of the power amplifier tube.
[0038] Furthermore, in this embodiment, as Figures 2 to 4 As shown, the microwave amplification module also includes a microstrip dual-directional coupling unit connected to the other end of the output microstrip line 13. This microstrip dual-directional coupling unit includes a transmission microstrip line 16, a coupling microstrip line 17, and a resistor R1. One end of the transmission microstrip line 16 is connected to the other end of the output microstrip line 13, and the other end of the transmission microstrip line 16 is connected to the microwave heating module 30 via the microwave feed module 20. The coupling microstrip line 17 is coupled to the transmission microstrip line 16. The first end of the resistor R1 is connected to the coupling microstrip line 17, preferably at the middle position of the coupling microstrip line 17, and the second end of the resistor R1 is grounded.
[0039] In this embodiment, the microstrip dual-directional coupling unit includes four ports: an input port, an output port, a forward coupling port, and a reverse coupling port. A transmission microstrip line 16 is connected between the input port and the output port, and a coupling microstrip line 17 is connected between the forward coupling port and the reverse coupling port. The transmission microstrip line 16 and the coupling microstrip line 17 are electromagnetically coupled. The transmission microstrip line 16 can be a microstrip line with a 50-ohm impedance for transmitting microwave signals. The physical conductor length can be 1 / 4 wavelength of the microwave signal at the operating frequency of the power amplifier tube 11, thus minimizing signal loss, optimizing transmission performance, and achieving good coupling performance. The intermediate resistor R1 can be a 50-ohm resistor as a bidirectional absorption resistor. When it is necessary to detect the forward microwave output signal, the reverse microwave reflection signal is absorbed by resistor R1. At this time, the microwave output signal coupled through the coupled microstrip line 17 can be sampled through the forward coupling port and then sent to the forward detection module (not shown) for signal detection. When it is necessary to detect the reverse microwave reflection signal, the forward microwave output signal is absorbed by resistor R1. At this time, the microwave reflection signal coupled through the coupled microstrip line 17 can be sampled through the reverse coupling port and then sent to the reverse detection module (not shown) for signal detection.
[0040] Furthermore, due to the inhomogeneity of the surrounding medium of the microstrip dual-directional coupling unit and the unequal phase velocities of odd and even modes, the directionality performance is poor. To improve the directionality performance, in this embodiment, such as... Figures 2 to 4 As shown, the edge shape of the coupling region in the coupling microstrip line 17 and the transmission microstrip line 16 is sawtooth-shaped. Of course, in other embodiments, it can also be crenellated. This sawtooth or crenellated coupling edge can reduce the odd-mode phase velocity, thereby improving the directionality index.
[0041] It should be understood that in other embodiments of this application, two independent microstrip coupling units may also be provided at the other end of the output microstrip line 13: a first microstrip coupling unit and a second microstrip coupling unit, wherein the first microstrip coupling unit is used to couple the microwave output signal; and the second microstrip coupling unit is used to couple the microwave reflected signal.
[0042] Furthermore, in this embodiment, as Figures 2 to 4 As shown, the microwave amplification module also includes a microstrip feeding unit, which includes a feeding microstrip line 15 and a decoupling capacitor C1. The first end of the feeding microstrip line 15 is connected to the drain terminal of the power amplifier tube 11, and the second end of the feeding microstrip line 15 is connected to a DC power supply (not shown). The first end of the decoupling capacitor C1 is connected to the feeding microstrip line, and the second end of the decoupling capacitor C1 is grounded. The length of the feeding microstrip line 15 is related to 1 / 4 wavelength of the microwave signal at the operating frequency of the power amplifier tube 11.
[0043] In this embodiment, the feed microstrip line 15 serves as the feed line to the drain terminal of the power amplifier tube. Its length is related to 1 / 4 wavelength of the center frequency of the power amplifier tube 11's operating frequency band; that is, approximately λ / 4 microstrip line is used to feed the power amplifier tube. For microwave signals at the operating frequency of the power amplifier tube 11, the microstrip feed unit appears open-circuited from the drain terminal of the power amplifier tube 11, preventing conduction. Therefore, it prevents the operating signal from leaking to the DC power supply, thus reducing signal loss and preventing the DC power supply from being affected by the operating signal. Simultaneously, for the second harmonic signal of the operating signal, the microstrip feed unit appears short-circuited, preventing the second harmonic from flowing out through the DC path. In summary, the feed microstrip line 15 can transmit the DC voltage signal from the DC power supply to the drain terminal of the power amplifier tube 11, but the operating signal and the second harmonic signal cannot flow away from the microstrip feed unit. This not only makes the DC power supply more stable, ensuring good performance of the power supply system, but also reduces microwave power loss and improves the additional efficiency of the power amplifier tube.
[0044] Furthermore, the microstrip power supply unit also includes a first filter capacitor, which is connected between the DC power supply and ground, such as... Figure 4 As shown, one end of the filter capacitors C41, C42, and C43 is connected to the feed microstrip line, and the other end is grounded.
[0045] Furthermore, since the DC power signal output by the DC power supply can reach the output port of the microwave amplification module through the microstrip feed unit and power amplifier tube 11 along the output microstrip line 13, in order to prevent the DC power signal from reaching the output port, in this embodiment, as follows: Figure 4 As shown, the microwave amplification module also includes a coupling capacitor C3 connected between the output microstrip line 13 and the transmission microstrip line 16. The coupling capacitor C3 can isolate the DC power supply signal to prevent the DC power supply signal from reaching the output port of the microwave amplification module.
[0046] Furthermore, the microwave amplification module also includes at least two second filter capacitors, with one end of each second filter capacitor connected to different locations on the output microstrip line, and the other end of each second filter capacitor grounded. For example... Figure 4 As shown, one end of filter capacitors C21, C22, and C23 are connected to different positions on the output microstrip line 13, and the other ends of filter capacitors C21, C22, and C23 are grounded. In this embodiment, by connecting filter capacitors with appropriate parameters at different lengths of the output microstrip line, an equivalent low-pass, low-impedance multi-order LC filter can be formed, which can effectively suppress out-of-band harmonics and thus improve the additional efficiency of the power amplifier tube.
[0047] Finally, it should be noted that the shapes of each microstrip line 12, 13, 14, 15, and 16 in the microwave amplification module of the aerosol forming apparatus of this application include, but are not limited to, straight lines, arcs, serpentine lines, right-angle bends, and chamfers.
[0048] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.
Claims
1. An aerosol forming apparatus, comprising a control module and, sequentially connected, a microwave generating module, a microwave amplification module, a microwave feeding module, and a microwave heating module, wherein the microwave generating module generates a microwave output signal under the control of the control module, the microwave amplification module amplifies the power of the microwave output signal, and feeds the amplified microwave output signal into the microwave heating module through the microwave feeding module, and the microwave heating module heats the aerosol forming matrix, characterized in that... The microwave amplification module includes: A power amplifier tube used to amplify the microwave output signal generated by the microwave generation module. One end is connected to the drain terminal of the power amplifier tube and is used to transmit the microwave output signal amplified by the power amplifier tube to the output microstrip line of the microwave feed module. An absorbing microstrip line is used to absorb microwave reflected signals on the output microstrip line, and one end of the absorbing microstrip line is connected to the drain terminal of the power amplifier tube.
2. The aerosol forming apparatus according to claim 1, characterized in that, The width of the output microstrip line decreases along the transmission direction of the microwave output signal.
3. The aerosol forming apparatus according to claim 1, characterized in that, The microwave amplification module also includes, but is not limited to, at least one of the following: A first microstrip coupling unit is connected to the other end of the output microstrip line and is used to couple the microwave output signal. A second microstrip coupling unit is connected to the other end of the output microstrip line and is used to couple microwave reflected signals.
4. The aerosol forming apparatus according to claim 3, characterized in that, The first microstrip coupling unit and the second microstrip coupling unit are integrated into a microstrip dual-directional coupling unit, and the microstrip dual-directional coupling unit includes: A transmission microstrip line is provided, with one end of the transmission microstrip line connected to the other end of the output microstrip line, and the other end of the transmission microstrip line connected to the microwave heating module through the microwave feed module. Coupled microstrip line coupled to the transmission microstrip line; A resistor, the first end of which is connected to the coupled microstrip line, and the second end of which is grounded.
5. The aerosol forming apparatus according to claim 4, characterized in that, The edge shape of the coupling region between the coupling microstrip line and the transmission microstrip line is sawtooth-shaped or crenellated.
6. The aerosol forming apparatus according to claim 4, characterized in that, The microwave amplification module further includes a microstrip feeding unit, which includes a feeding microstrip line and a decoupling capacitor. The first end of the feeding microstrip line is connected to the drain terminal of the power amplifier tube, and the second end of the feeding microstrip line is connected to a DC power supply. The first end of the decoupling capacitor is connected to the feeding microstrip line, and the second end of the decoupling capacitor is grounded. The length of the feeding microstrip line is related to 1 / 4 wavelength of the microwave signal at the operating frequency of the power amplifier tube.
7. The aerosol forming apparatus according to claim 6, characterized in that, The microstrip power supply unit also includes a first filter capacitor, which is connected between the DC power supply and ground.
8. The aerosol forming apparatus according to claim 6, characterized in that, The microwave amplification module also includes: A coupling capacitor connected between the output microstrip line and the transmission microstrip line.
9. The aerosol forming apparatus according to any one of claims 1-8, characterized in that, The microwave amplification module also includes at least two second filter capacitors, one end of each of the at least two second filter capacitors is connected to different positions on the output microstrip line, and the other end of each of the at least two second filter capacitors is grounded.
10. The aerosol forming apparatus according to claim 1, characterized in that, The microwave amplification module also includes: An input microstrip line is connected to the gate terminal of the power amplifier tube, and the width of the input microstrip line increases along the transmission direction of the microwave output signal.