A radio frequency signal source, a radio frequency signal generation system and an aerosol generating device

Abstract

The application provides a radio frequency signal source, a radio frequency signal generation system and an aerosol generating device, which are applied to the field of radio frequency technology. The signal source comprises a phase detector, a signal generation module and a frequency divider. The phase detector, the signal generation module and the frequency divider are connected in sequence. The frequency divider is further connected to the phase detector. The phase detector receives a reference signal and a frequency divided signal, and outputs a detection signal representing the phase difference between the reference signal and the frequency divided signal. The signal generation module generates a radio frequency signal based on the detection signal. The frequency divider performs frequency division processing on the radio frequency signal and outputs the frequency divided signal to the phase detector. In this way, the output of the radio frequency signal can be adjusted based on the phase difference between the actual output radio frequency signal and the reference signal, closed-loop control of the radio frequency signal output process is realized, the stability of the actual output radio frequency signal is effectively ensured, the power of the radio frequency signal is amplified through a power amplification module, the heating efficiency of the aerosol substrate can be effectively improved, and the use requirements of users are met.

Description

Technical Field

[0001] This application relates to the field of radio frequency technology, specifically to a radio frequency signal source, a radio frequency signal generation system, and an aerosol generation device. Background Technology

[0002] Radio frequency (RF) power transfer technology has been widely used in solid-state power sources, electronic aerosol generators, and industrial heating equipment. In typical applications, the signal source provides RF signals to heat the material to be heated. For example, an aerosol generator uses RF signals to heat the aerosol matrix within a resonant cavity to provide users with aerosols of varying qualities. Therefore, providing a stable RF signal is one of the key factors for the normal operation of aerosol generators and other similar equipment.

[0003] In related technologies, radio frequency (RF) signals are mostly output through voltage-controlled oscillators (VCOs). By adjusting the control voltage of the VCO, the output RF signals of different frequencies can be controlled. However, due to factors such as process deviations and differences in operating environment (e.g., ambient temperature), the RF signals output by the VCO under the same control voltage are not exactly the same, and may even differ greatly. The stability of the RF signals is insufficient and it is difficult to meet the needs of practical applications. Utility Model Content

[0004] In view of this, this application aims to provide a radio frequency signal source, a radio frequency signal generation system, and an aerosol generation device to solve the problem of insufficient radio frequency signal stability in related technologies, which makes it difficult to meet the needs of practical applications.

[0005] In a first aspect, this application provides a radio frequency signal source for use in an aerosol generating device, wherein the aerosol generating device is provided with a resonator for containing an aerosol matrix, and the radio frequency signal source includes:

[0006] A phase detector has a first input terminal, a second input terminal, and an output terminal, wherein...

[0007] The first input terminal is used to receive a reference signal, and the second input terminal is used to receive a frequency-divided signal;

[0008] The phase detector is used to output a detection signal representing the phase difference between the reference signal and the frequency division signal through the output terminal;

[0009] A signal generation module, connected to the output of the phase detector, is used to generate a radio frequency signal based on the detection signal;

[0010] The frequency divider is connected to the signal generation module and the second input terminal of the phase detector, respectively, and is used to perform frequency division processing on the radio frequency signal and output the frequency division signal to the phase detector.

[0011] A power amplification module is connected to both the signal generation module and the resonator. It is used to amplify the power of the radio frequency signal and output the amplified radio frequency signal to the resonator to heat the aerosol matrix in the resonator.

[0012] In one optional implementation, the signal generation module includes:

[0013] A charge pump, connected to the phase detector, is used to generate a detection current based on the detection signal;

[0014] A filter, connected to the charge pump, is used to convert the detected current into a target control voltage;

[0015] A voltage-controlled oscillator, connected to the filter, is used to output the radio frequency signal based on the target control voltage.

[0016] In one optional implementation, the voltage-controlled oscillator is configured with a preset mapping relationship, which records the correspondence between different control voltages and different radio frequency signal frequencies;

[0017] The voltage-controlled oscillator is configured to: determine the target radio frequency signal frequency corresponding to the target control voltage based on the preset mapping relationship, and output the radio frequency signal according to the target radio frequency signal frequency.

[0018] In one alternative implementation, the voltage-controlled oscillator is further configured to output the radio frequency signal according to a preset initial control voltage.

[0019] In one alternative implementation, the filter includes a low-pass filter, which is also used to filter out high-frequency harmonics in the detection current.

[0020] In one alternative implementation, the power amplification module includes a driver amplifier and a final stage amplifier, wherein,

[0021] The input terminal of the driver amplifier is connected to the output terminal of the signal generation module, and is used to perform initial power amplification on the radio frequency signal output by the signal generation module;

[0022] The input terminal of the final stage amplifier is connected to the output terminal of the driver amplifier, and is used to perform secondary power amplification on the radio frequency signal after the first power amplification, so that the radio frequency signal reaches the target power.

[0023] In one alternative implementation, the frequency divider includes a fractional frequency divider.

[0024] Secondly, this application provides a radio frequency signal generation system applied to an aerosol generating device, wherein the aerosol generating device is provided with a resonator for containing an aerosol matrix, and the radio frequency signal generation system includes:

[0025] The radio frequency signal source provided in any embodiment of the first aspect of this application is used to generate radio frequency signals based on a reference frequency;

[0026] A circulator, connected to the radio frequency signal source, is used to send the radio frequency signal to the resonator to heat the aerosol matrix, and to collect the reflected signal from the resonator;

[0027] A detection circuit, connected to the circulator, converts the reflected signal into a detection voltage that is positively correlated with the reflected power of the reflected signal;

[0028] The processing module is connected to both the detection circuit and the radio frequency signal source, and provides the reference frequency to the radio frequency signal source based on the detection voltage.

[0029] In one optional implementation, the detection circuit includes:

[0030] A coupler, connected to the circulator, is used to acquire the reflected signal;

[0031] A reverse power detector, connected to the coupler, converts the reflected signal into a DC voltage that is positively correlated with the reflected power of the reflected signal;

[0032] An analog-to-digital converter module is connected to both the reverse power detector and the processing module, and is used to convert the DC voltage into a detection voltage that the processing module can recognize.

[0033] Thirdly, this application provides an aerosol generating apparatus, comprising: a radio frequency signal generating system as provided in any embodiment of the second aspect of this application, and a resonator, wherein...

[0034] The resonator is provided with a resonant cavity, which is used to contain the aerosol matrix;

[0035] The radio frequency signal generation system is connected to the resonator. It outputs a radio frequency signal to the resonator to heat the aerosol matrix.

[0036] Based on the above, the radio frequency signal source provided in this application is applied to an aerosol generating device, and the aerosol generating device is equipped with a resonator for containing an aerosol matrix. The radio frequency signal source includes a phase detector, a signal generation module, and a frequency divider. The phase detector, signal generation module, and frequency divider are connected in sequence. The frequency divider is further connected to the phase detector. The phase detector receives a reference signal and a frequency-divided signal, and outputs a detection signal characterizing the phase difference between the reference signal and the frequency-divided signal. The signal generation module generates a radio frequency signal based on the detection signal. The frequency divider performs frequency division processing on the radio frequency signal and outputs the frequency-divided signal to the phase detector. With this configuration, the output of the radio frequency signal can be adjusted based on the phase difference between the actual output radio frequency signal and the reference signal, realizing closed-loop control of the radio frequency signal output process. Compared with the open-loop control in related technologies, it can effectively ensure the stability of the actual output radio frequency signal and meet the needs of practical applications.

[0037] Furthermore, by amplifying the power of the radio frequency signal through the power amplifier module, the heating efficiency of the aerosol matrix in the resonator can be effectively improved, thereby enhancing the user experience. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a structural block diagram of a radio frequency signal source provided in an embodiment of the present invention.

[0040] Figure 2 This is a structural block diagram of another radio frequency signal source provided in this embodiment of the present invention.

[0041] Figure 3 This is a structural block diagram of another radio frequency signal source provided in this embodiment of the present invention.

[0042] Figure 4 This is a structural block diagram of a radio frequency signal generation system provided in an embodiment of the present invention.

[0043] Figure 5 This is a structural block diagram of another radio frequency signal generation system provided in this embodiment of the present invention. Detailed Implementation

[0044] 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.

[0045] As mentioned earlier, radio frequency (RF) energy transfer technology is widely used in various fields such as solid-state power sources, electronic aerosol generators, and industrial heating equipment. Taking an aerosol generator as an example, an RF signal is injected into a resonant cavity containing an aerosol matrix, forming a microwave electromagnetic field within the cavity. The aerosol matrix absorbs the RF signal energy, causing its temperature to rise and ultimately forming an aerosol. Due to the penetrability of the RF signal and the fact that the aerosol matrix is ​​completely immersed in the electromagnetic field, the aerosol matrix can be heated uniformly inside and out, effectively achieving the effect of heating without combustion and resulting in a superior taste.

[0046] In related technologies, radio frequency (RF) signals are mostly output through voltage-controlled oscillators (VCOs). Adjusting the control voltage of the VCO can control the output of RF signals of different frequencies. However, since related technologies use an open-loop control method, the VCO is greatly affected by factors such as process deviations and differences in operating environment (e.g., ambient temperature). This results in the output RF signals having different frequencies, or even significant differences, under the same control voltage. When the ambient temperature rises, the amplitude of the RF signal output by the VCO also changes, leading to insufficient stability of the RF signal and making it difficult to meet the needs of practical applications.

[0047] To address the aforementioned issues, this application provides a radio frequency (RF) signal source that can adjust the RF signal output based on the phase difference between the actual output RF signal and a reference signal, thereby achieving closed-loop control of the RF signal output process. Compared to open-loop control in related technologies, this significantly reduces the impact of process deviations, environmental differences, and other factors on the stability of the RF signal, effectively ensuring the stability of the actual output RF signal and thus meeting practical application requirements.

[0048] It should be noted that the radio frequency signal sources provided in the subsequent embodiments of this application are all applied to an aerosol generating device. The aerosol generating device is equipped with a resonator, and the resonator is configured with a resonant cavity for containing the aerosol matrix. The radio frequency signal source provides a radio frequency signal to the resonator, which can heat the aerosol matrix inside the resonant cavity, thereby generating aerosol.

[0049] Based on the above, see Figure 1 The radio frequency signal source provided in this application embodiment includes a phase detector 10, a signal generation module 20, a frequency divider 30, and a power amplifier module 40.

[0050] Combination Figure 1As shown, the phase detector 10 is equipped with a first input terminal, a second input terminal, and an output terminal. The first input terminal of the phase detector 10 is used to receive a reference signal. In a preferred embodiment, the reference signal is provided by the processing module in the aerosol generating device to which the radio frequency signal source belongs. The specific implementation will be discussed later and will not be detailed here. Of course, the reference signal can also be provided to the phase detector through other means, which will not be listed here. It should be noted that the reference signal can be considered a standard signal. Ideally, the frequency of the radio frequency signal output by the radio frequency signal source should eventually stabilize at a target value that is proportional to the frequency of the reference signal (determined by the division ratio of the frequency divider 30). However, in practical applications, due to various factors, the phase difference between the radio frequency signal output by the radio frequency signal source and the reference signal is inevitable. The ultimate goal of the radio frequency signal source provided in this application is to reduce the difference between the radio frequency signal output by the radio frequency signal source and the reference signal.

[0051] The second input terminal of the phase detector 10 is used to receive the frequency division signal, combined with Figure 1 As shown, the radio frequency signal is provided by the frequency divider 30. The specific process will be discussed in detail later and will not be described here. The output of the phase detector 10 is connected to the input of the signal generation module 20.

[0052] In this application, the phase detector 10 is used to compare and determine the phase difference between the obtained reference signal and the frequency division signal, and outputs a detection signal characterizing the phase difference through its output terminal. In an optional embodiment, the detection signal output by the phase detector 10 can be an error pulse signal, specifically including two pulse signals (an overshoot pulse signal and an undershoot pulse signal), and the phase difference between these two pulse signals is the phase difference between the reference signal and the frequency division signal. In another optional embodiment, the phase detector 10 can also output a voltage signal or a current signal that has a preset proportional relationship with the phase difference between the reference signal and the frequency division signal; this is also optional. Of course, the phase detector 10 can also output other detection signals that can characterize the phase difference between the reference signal and the frequency division signal, which will not be listed here. As for the specific implementation of the phase detector 10, it can be implemented with reference to related technologies, and this application does not make specific limitations on it.

[0053] The input terminal of the signal generation module 20 is connected to the output terminal of the phase detector 10. It generates a radio frequency signal based on the detection signal provided by the phase detector 10, and combines it with... Figure 1 As shown, the output of the signal generation module 20 is connected to the frequency divider 30 and the power amplifier module 40 respectively, providing radio frequency signals to the frequency divider 30 and the power amplifier module 40 respectively.

[0054] The output of frequency divider 30 is connected to the second input of phase detector 10. Frequency divider 30 is used to divide the radio frequency signal output by signal generation module 20 according to a preset division ratio and provide the divided signal to phase detector 10. In a preferred embodiment, frequency divider 30 employs a fractional frequency divider to achieve non-integer frequency division. The fractional frequency divider has a built-in Σ-Δ modulator, which can dynamically switch the division ratio to make the average division ratio a fraction, thereby achieving smaller frequency steps, providing finer frequency resolution, and maintaining a high switching speed. The specific implementation of frequency divider 30 can be found in relevant technologies.

[0055] After receiving the frequency division signal fed back by the frequency divider 30, the phase detector 10 can compare it with the obtained reference signal, thereby outputting a detection signal that characterizes the phase difference between the two, and then adjusting the output radio frequency signal of the signal generation module 20.

[0056] Furthermore, the input terminal of the power amplifier module 40 is connected to the output terminal of the signal generation module 20, and the output terminal of the power amplifier module 40 is connected to the resonator (not shown in the figure). The power amplifier module 40 amplifies the radio frequency signal output by the signal generation module 20 and further outputs the amplified radio frequency signal to the resonator, thereby heating the aerosol matrix in the resonator to form an aerosol.

[0057] In summary, the radio frequency signal source provided in this application embodiment comprises a phase detector, a signal generation module, and a frequency divider, which constitute a closed-loop control loop for outputting radio frequency signals. The output of the radio frequency signal can be adjusted based on the phase difference between the actual output radio frequency signal and the reference signal, thereby realizing closed-loop control of the radio frequency signal output process. Compared with the open-loop control in related technologies, this can effectively ensure the stability of the actual output radio frequency signal and meet the needs of practical applications.

[0058] Furthermore, by amplifying the power of the radio frequency signal through the power amplifier module, the heating efficiency of the aerosol matrix in the resonator can be effectively improved, thereby enhancing the user experience.

[0059] This application embodiment also provides another radio frequency signal source. Based on the foregoing embodiments, this embodiment provides an optional implementation of the signal generation module, see [link to relevant documentation]. Figure 2 As shown, in the radio frequency signal source provided in this embodiment, the signal generation module 20 includes a charge pump 210, a filter 220, and a voltage-controlled oscillator 230.

[0060] Combination Figure 2As shown, the input terminal of charge pump 210 serves as the input terminal of signal generation module 20 and is connected to the output terminal of phase detector 10. The output terminal of charge pump 210 is connected to filter 220. Charge pump 210 receives the detection signal output by phase detector 10 and generates a corresponding detection current based on the obtained detection signal. Based on the foregoing, in an optional embodiment, phase detector 10 outputs two pulse signals, and charge pump 210 converts the two obtained pulse signals into analog current signals. The overshoot pulse signal is converted into a positive current output, and the undershoot pulse signal is converted into a negative current input, thereby forming a closed detection current transmission path with the filter 220 connected to the subsequent stage.

[0061] In practical applications, the circuit parameters of the charge pump 210 are adjustable. Based on this, in an optional implementation, in order to adjust the radio frequency signal output by the signal generation module 20 as quickly as possible, the charge pump 210 can be configured to use a large current in the initial stage of output detection current to accelerate frequency traction, and switch to a smaller current in the subsequent process to reduce the jitter of the radio frequency signal. That is, to realize the segmented output of the detection current, the current in the initial stage is greater than the current in the subsequent stage, to ensure that the radio frequency signal stabilizes as quickly as possible.

[0062] Filter 220 is mainly used to convert the detection current output by charge pump 210 into the target control voltage. In an optional embodiment, filter 220 is a low-pass filter, which can filter out high-frequency harmonics in the detection current and convert the detection current into a smooth DC control voltage, i.e., the target control voltage. Similar to the aforementioned charge pump 210, the circuit parameters of the low-pass filter are also adjustable. In practical applications, the bandwidth of the low-pass filter can be set according to the actual conversion requirements. When it is necessary to test the output performance of the RF signal source over a large range (such as during frequency sweep), a larger bandwidth can be set. Conversely, when it is necessary for the RF signal source to output RF signals at a specific frequency or within a specific frequency band, a smaller bandwidth can be set to effectively suppress noise interference. Filter 220 can be a passive filter or an active filter; as long as it does not exceed the core concept of this application, it is also within the scope of protection of this application.

[0063] The input terminal of the voltage-controlled oscillator 230 is connected to the output terminal of the filter 220. The output terminal of the voltage-controlled oscillator 230 serves as the output terminal of the signal generation circuit 20, and is connected to the frequency divider 30 and the power amplifier module 40, respectively. The voltage-controlled oscillator 230 is used to output an RF signal based on the target control voltage output by the filter 220. The voltage-controlled oscillator 230 adopts an LC (inductor-capacitor) resonant structure, and uses a four-digit digitally controlled capacitor array to achieve 1MHz step tuning. For the specific implementation of the voltage-controlled oscillator 230, please refer to relevant technologies, which will not be detailed here.

[0064] In one optional implementation, a preset mapping relationship is configured for the voltage-controlled oscillator 230. This preset mapping relationship records the correspondence between different control voltages and different radio frequency signal frequencies. After obtaining the target control voltage provided by the filter 220, the preset mapping relationship is consulted to determine the target radio frequency signal frequency that matches the target control voltage, and finally, the radio frequency signal is output according to the target radio frequency signal frequency. This configuration allows for the rapid determination of the target radio frequency signal frequency corresponding to the obtained target control voltage and the rapid output of the radio frequency signal, thereby effectively improving the efficiency of the radio frequency signal source output and the adjustment of the radio frequency signal. In practical applications, the aforementioned preset mapping relationship can be implemented in various ways, such as curves, array pairs, etc., which will not be detailed here. This application does not limit the specific form of the preset mapping relationship.

[0065] In another alternative implementation, an initial control voltage can be configured for the voltage-controlled oscillator 230, which then outputs an RF signal according to the initial control voltage upon power-up. This configuration effectively improves the operating efficiency of the voltage-controlled oscillator 230, ensuring it outputs an RF signal according to the initial control voltage upon power-up. Furthermore, with a properly set initial control voltage, the final RF signal output by the RF signal source matches the usage requirements, avoiding repeated frequency tuning processes and further improving the operating efficiency of the RF signal source, thus enhancing the user experience.

[0066] As an optional implementation, the core components of the radio frequency signal source provided in this embodiment, such as the phase detector 10, the voltage-controlled oscillator 230, and the frequency divider 30, can be integrated using CMOS (Complementary Metal-Oxide-Semiconductor) technology, so that the area of ​​each component on the control board is less than 1 mm². 2 This allows for the miniaturization of aerosol generating devices to meet the requirements of their use.

[0067] In summary, the radio frequency signal source provided in this embodiment offers an optional implementation of a signal generation circuit. Through the cooperation of a charge pump, a filter, and a voltage-controlled oscillator, radio frequency signals can be generated efficiently and stably, thereby meeting the needs of practical applications.

[0068] Furthermore, this application embodiment provides another radio frequency signal source. Based on the foregoing embodiments, this embodiment provides an optional implementation of the power amplifier module, see [link to relevant documentation]. Figure 3 As shown, in the radio frequency signal source provided in this embodiment, the power amplification module 40 includes a driver amplifier 410 and a final stage amplifier 420.

[0069] Combination Figure 3As shown, the input terminal of the driver amplifier 410 serves as the input terminal of the power amplifier module 40 and is connected to the output terminal of the signal generation module 20. The output terminal of the driver amplifier 410 is connected to the input terminal of the final stage amplifier 420, and the output terminal of the final stage amplifier 420 serves as the output terminal of the power amplifier module 40 and is connected to the resonator (not shown in the figure).

[0070] The amplifier 410 receives the radio frequency signal output by the signal generation module 20, performs a first power amplification on the obtained radio frequency signal, and then outputs it to the final stage amplifier 420. The final stage amplifier 420 performs a second power amplification on the radio frequency signal after the first power amplification, so that the target power of the radio frequency signal finally output to the resonator meets the operating requirements of the aerosol generating device.

[0071] In summary, the RF signal source provided in this embodiment features a two-stage power amplifier module. The first stage of power amplification of the RF signal is achieved through a driver amplifier, followed by a second stage of power amplification through a final stage amplifier. This ensures that the final RF signal output to the resonator meets the usage requirements. Furthermore, the two-stage power amplifier allows the driver amplifier to focus on voltage gain, while the final stage amplifier focuses on power gain. By reducing the driving requirements of the final stage amplifier through the driver amplifier, the final stage amplifier operates in its high-efficiency region, which helps reduce heat loss and optimize harmonic suppression.

[0072] This application also provides a radio frequency signal generation system applied to an aerosol generating device, wherein the aerosol generating device is provided with a resonator for containing an aerosol matrix. See [link to relevant documentation]. Figure 4 As shown, the radio frequency signal generation system provided in this embodiment includes: a radio frequency signal source 100, a circulator 200, a detector circuit 300, a processing module 400, and a resonator 500 provided in any of the preceding embodiments.

[0073] Combination Figure 4 As shown, the output terminal of the radio frequency signal source 100 is connected to the circulator 200. The radio frequency signal source 100 outputs a radio frequency signal based on the reference signal provided by the processing module 400. As for the specific implementation of the radio frequency signal source 100, please refer to the relevant content of the foregoing embodiment, which will not be repeated here.

[0074] The circulator 200 is connected to both the detector circuit 300 and the resonator 500. The circulator 200 has two signal transmission paths. One path outputs the radio frequency signal provided by the radio frequency signal source 100 to the resonator 500 to heat the aerosol matrix within the resonant cavity of the resonator 500. The other path collects the reflected signal from the resonator 500 and outputs the resulting reflected signal to the detector circuit 300. The specific implementation of the circulator 200 can be found in relevant technologies and will not be detailed here.

[0075] The output of the detector circuit 300 is connected to the processing module 400, which converts the reflected signal output by the circulator 200 into a detection voltage that is positively correlated with the reflected power of the reflected signal.

[0076] The processing module 400 is connected to the detection circuit 300 and the radio frequency signal source 100 respectively. The processing module 400 provides a reference frequency to the radio frequency signal source 100 based on the obtained detection voltage, so that the radio frequency signal source 100 outputs a radio frequency signal based on the obtained reference frequency.

[0077] In one alternative implementation, the detector circuit 300 may refer to Figure 5 The embodiment shown includes a detector circuit 300 comprising a coupler 310, a reverse power detector 320, and an analog-to-digital converter module 330.

[0078] Combination Figure 5 As shown, the input terminal of the coupler 310 serves as the input terminal of the detector circuit 300 and is connected to the circulator 200. The output terminal of the coupler 310 is connected to the input terminal of the reverse power detector 320. The output terminal of the reverse power detector 320 is connected to the input terminal of the analog-to-digital converter module 330. The output terminal of the analog-to-digital converter module 330 serves as the output terminal of the detector circuit 300 and is connected to the processing module 400.

[0079] Based on the above connection relationship, the coupler 310 acquires the reflected signal output by the circulator 200 and outputs the obtained reflected signal to the reverse power detector 320. The reverse power detector 320 converts the obtained reflected signal into a DC voltage that is positively correlated with the reflected power of the reflected signal. As for the specific implementation of the reverse power detector 320, it can also be implemented with reference to relevant technologies, and will not be described in detail here.

[0080] Furthermore, the analog-to-digital converter 330 converts the DC voltage output by the reverse power detector 320 into a detection voltage that the processing module 400 can recognize. The processing module 400 then outputs a reference signal based on the obtained detection voltage.

[0081] In summary, the radio frequency signal generation system provided in the above embodiments of this application constitutes a closed-loop control circuit through a circulator, a detector circuit, and a processing module. By collecting the reflected power of the resonator, the output of the radio frequency signal source is adjusted. For example, when the processing module determines, based on the detection voltage (which is essentially the reflected power of the reflected signal), that the resonant cavity has suffered resonance mismatch due to the replacement of the aerosol matrix, it can promptly detect the impedance change within the resonator through the detector circuit and adjust the reference signal output to the radio frequency signal source in a timely manner. This allows the radio frequency signal source to adjust its output radio frequency signal, ensuring that the corresponding resonant point matches the aerosol matrix, efficiently and reliably heating the aerosol matrix, and improving the user experience.

[0082] Furthermore, the processing module can flexibly adjust the reference signal output to the RF signal source according to other requirements in actual applications, so that the RF signal output by the RF signal source meets the current application requirements.

[0083] This application also provides an aerosol generating device, comprising: the radio frequency signal generating system and the resonator provided in any of the foregoing embodiments, wherein...

[0084] The resonator is equipped with a resonant cavity, which is used to contain the aerosol matrix;

[0085] The radio frequency (RF) signal generation system is connected to the resonator. An RF signal is output to the resonator to heat the aerosol matrix.

[0086] Those skilled in the art will understand that the contents disclosed herein can be varied and modified in many ways. For example, the various devices or components described above can be implemented in hardware, or in software, firmware, or a combination of some or all of the three.

[0087] Furthermore, while this disclosure makes various references to certain units in systems according to embodiments of this disclosure, any number of different units can be used and operated on clients and / or servers. The units are merely illustrative, and different aspects of the system may use different units.

[0088] Unless otherwise defined, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. It should also be understood that terms such as those defined in a common dictionary should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0089] The foregoing description is intended to illustrate the present disclosure and should not be construed as limiting it. While several exemplary embodiments of the present disclosure have been described, those skilled in the art will readily understand that many modifications may be made to the exemplary embodiments without departing from the novel teachings and advantages of the present disclosure. Therefore, all such modifications are intended to be included within the scope of the present disclosure as defined by the claims. It should be understood that the foregoing description is intended to illustrate the present disclosure and should not be construed as limiting it to the specific embodiments disclosed, and modifications to the disclosed embodiments and other embodiments are intended to be included within the scope of the appended claims. The present disclosure is defined by the claims and their equivalents.

Claims

1. A radio frequency signal source, characterized in that, The radio frequency signal source is applied to an aerosol generating device, wherein the aerosol generating device is provided with a resonator for containing an aerosol matrix, and the radio frequency signal source includes: A phase detector has a first input terminal, a second input terminal, and an output terminal, wherein... The first input terminal is used to receive a reference signal, and the second input terminal is used to receive a frequency-divided signal; The phase detector is used to output a detection signal representing the phase difference between the reference signal and the frequency division signal through the output terminal; A signal generation module, connected to the output of the phase detector, is used to generate a radio frequency signal based on the detection signal; The frequency divider is connected to the signal generation module and the second input terminal of the phase detector, respectively, and is used to perform frequency division processing on the radio frequency signal and output the frequency division signal to the phase detector. A power amplification module is connected to both the signal generation module and the resonator. It is used to amplify the power of the radio frequency signal and output the amplified radio frequency signal to the resonator to heat the aerosol matrix in the resonator.

2. The radio frequency signal source according to claim 1, characterized in that, The signal generation module includes: A charge pump, connected to the phase detector, is used to generate a detection current based on the detection signal; A filter, connected to the charge pump, is used to convert the detected current into a target control voltage; A voltage-controlled oscillator, connected to the filter, is used to output the radio frequency signal based on the target control voltage.

3. The radio frequency signal source according to claim 2, characterized in that, The voltage-controlled oscillator is configured with a preset mapping relationship, which records the correspondence between different control voltages and different radio frequency signal frequencies; The voltage-controlled oscillator is configured to: determine the target radio frequency signal frequency corresponding to the target control voltage based on the preset mapping relationship, and output the radio frequency signal according to the target radio frequency signal frequency.

4. The radio frequency signal source according to claim 3, characterized in that, The voltage-controlled oscillator is also configured to output the radio frequency signal according to a preset initial control voltage.

5. The radio frequency signal source according to claim 2, characterized in that, The filter includes a low-pass filter, which is also used to filter out high-frequency harmonics in the detection current.

6. The radio frequency signal source according to claim 1, characterized in that, The power amplifier module includes a driver amplifier and a final stage amplifier, wherein... The input terminal of the driver amplifier is connected to the output terminal of the signal generation module, and is used to perform initial power amplification on the radio frequency signal output by the signal generation module; The input terminal of the final stage amplifier is connected to the output terminal of the driver amplifier, and is used to perform secondary power amplification on the radio frequency signal after the first power amplification, so that the radio frequency signal reaches the target power.

7. The radio frequency signal source according to any one of claims 1 to 6, characterized in that, The frequency divider includes a fractional frequency divider.

8. A radio frequency signal generation system, characterized in that, The radio frequency signal generation system is applied to an aerosol generating device, wherein the aerosol generating device is provided with a resonator for containing an aerosol matrix, and the radio frequency signal generation system includes: The radio frequency signal source as described in any one of claims 1-7 is used to generate radio frequency signals based on a reference frequency; A circulator, connected to the radio frequency signal source, is used to send the radio frequency signal to the resonator to heat the aerosol matrix, and to collect the reflected signal from the resonator; A detection circuit, connected to the circulator, converts the reflected signal into a detection voltage that is positively correlated with the reflected power of the reflected signal; The processing module is connected to both the detection circuit and the radio frequency signal source, and provides the reference frequency to the radio frequency signal source based on the detection voltage.

9. The radio frequency signal generation system according to claim 8, characterized in that, The detection circuit includes: A coupler, connected to the circulator, is used to acquire the reflected signal; A reverse power detector, connected to the coupler, converts the reflected signal into a DC voltage that is positively correlated with the reflected power of the reflected signal; An analog-to-digital converter module is connected to both the reverse power detector and the processing module, and is used to convert the DC voltage into a detection voltage that the processing module can recognize.

10. An aerosol generating device, characterized in that, include: The radio frequency signal generation system and resonator as described in claim 8 or 9, wherein, The resonator is provided with a resonant cavity, which is used to contain the aerosol matrix; The radio frequency signal generation system is connected to the resonator and outputs a radio frequency signal to the resonator to heat the aerosol matrix.

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