Radio frequency front-end circuit and wireless network device

Abstract

The present invention relates to the field of wireless charging technology, and discloses a radio frequency front-end circuit and a wireless network device. The frequency switching module receives a first switching instruction, and according to the first switching instruction, sends a radio frequency signal to the antenna switching module, or according to the first switching instruction, sends the radio frequency signal to the frequency conversion module for frequency conversion; the antenna switching module receives a second switching instruction, and according to the second switching instruction, sends the radio frequency signal sent by the frequency switching module to the WiFi signal transmitting module, or according to the second switching instruction, sends the radio frequency signal frequency-converted by the frequency conversion module to the charging signal transmitting module; the WiFi signal transmitting module transmits a WiFi communication signal according to the radio frequency signal sent by the antenna switching module; the charging signal transmitting module transmits a wireless charging signal according to the radio frequency signal sent by the antenna switching module and frequency-converted by the frequency conversion module, so that wireless charging and communication can be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless charging, and in particular to a radio frequency front-end circuit and a wireless network device. Background Art

[0002] At present, the existing wireless charging technologies mainly include the following three technical solutions:

[0003] a) Electromagnetic induction

[0004] The alternating current of a certain frequency in the primary coil generates a certain current in the secondary coil through electromagnetic induction, thereby transferring energy from the transmitting end to the receiving end. The most common charging solution currently uses electromagnetic induction, such as the wireless charging solution for mobile phones. The charging base and the mobile phone terminal are each equipped with a coil. When the two are close to each other, the transmitting coil generates a certain current in the mobile phone receiving coil through electromagnetic induction based on the alternating current of a certain frequency, thereby transferring the point energy from the transmitting end to the receiving end, and then starting to supply power to the mobile phone from the charging base. Because the principle is simple and easy to make, the disadvantage of wireless charging achieved by electromagnetic induction is that it is difficult to perform long-distance wireless charging transmission.

[0005] b) Magnetic field resonance

[0006] It consists of an energy transmitting device and an energy receiving device. When the two devices are adjusted to the same frequency, or resonate at a specific frequency, they can exchange energy with each other. It is a technology currently under research. Compared with electromagnetic induction, wireless charging based on magnetic resonance achieves charging with a longer transmission distance. However, because both parties need to be at the same resonant frequency at the same time, there are higher frequency restrictions and usage limitations on the transmitting and receiving devices.

[0007] c) Radio wave type

[0008] The principle can be simply summarized as converting ambient electromagnetic waves into charging current. This wireless charging method has a transmission distance of more than 10 meters, is suitable for long-distance low-power charging, and can also realize automatic charging anytime and anywhere. However, due to the low conversion efficiency, if this method is used, the charging time will be relatively long.

[0009] However, the above existing wireless charging methods are only for charging, so the functions are relatively simple and the application scenarios are relatively limited. Summary of the invention

[0010] The purpose of the embodiments of the present invention is to provide a radio frequency front-end circuit and a wireless network device, which can realize charging and communication.

[0011] To solve the above technical problems, an embodiment of the present invention provides a radio frequency front-end circuit, including a frequency conversion module, a frequency switching module, an antenna switching module, a WiFi signal transmitting module, and a charging signal transmitting module;

[0012] The frequency switching module is configured to receive a first switching instruction, and send a radio frequency signal to the antenna switching module according to the first switching instruction, or send the radio frequency signal to the frequency conversion module for frequency conversion according to the first switching instruction;

[0013] The antenna switching module is configured to receive a second switching instruction, and send the radio frequency signal sent by the frequency switching module to the WiFi signal transmitting module according to the second switching instruction, or send the radio frequency signal frequency-converted by the frequency conversion module to the charging signal transmitting module according to the second switching instruction;

[0014] The WiFi signal transmitting module is configured to transmit a WiFi communication signal according to the radio frequency signal sent by the antenna switching module;

[0015] The charging signal transmitting module is configured to transmit a wireless charging signal according to the radio frequency signal sent by the antenna switching module and frequency-converted by the frequency conversion module.

[0016] As a preferred solution, the radio frequency front-end circuit further includes a baseband module and a radio frequency module;

[0017] The baseband module is configured to generate a control instruction, the first switching instruction, and the second switching instruction, and send the control instruction to the radio frequency module, the first switching instruction to the frequency switching module, and the second switching instruction to the antenna switching module;

[0018] The radio frequency module is configured to generate a radio frequency signal according to the control instruction, and send the radio frequency signal to the frequency switching module.

[0019] As a preferred solution, the number of the radio frequency modules, the frequency switching modules, the antenna switching modules, and the WiFi signal transmitting modules is at least two, and at least two radio frequency modules, at least two frequency switching modules, at least two antenna switching modules, and at least two WiFi signal transmitting modules are in a one-to-one correspondence;

[0020] When the baseband module receives a charging request, it selects a radio frequency module with an idle frequency band from at least two of the radio frequency modules, and generates a first switching instruction and a second switching instruction according to the charging request, so that the frequency switching module corresponding to the selected radio frequency module sends the radio frequency signal of the selected radio frequency module to the frequency conversion module for frequency conversion according to the first switching instruction, and the antenna switching module corresponding to the selected radio frequency module sends the radio frequency signal frequency-converted by the frequency conversion module to the charging signal transmitting module according to the second switching instruction.

[0021] As a preferred solution, when the charging signal transmitting module transmits a wireless charging signal, at least one of the WiFi signal transmitting modules transmits a WiFi communication signal; wherein, the frequency band of the wireless charging signal is different from the frequency bands of the WiFi communication signals transmitted by at least one of the WiFi signal transmitting modules.

[0022] As a preferred solution, the frequency conversion module includes at least two frequency multipliers; when the baseband module receives a charging request, it selects a radio frequency module with an idle frequency band from at least two of the radio frequency modules, and generates a first switching instruction and a second switching instruction according to the charging request, so that the frequency switching module corresponding to the selected radio frequency module sends the radio frequency signal of the selected radio frequency module to the frequency conversion module for frequency conversion according to the first switching instruction, and the antenna switching module corresponding to the selected radio frequency module sends the radio frequency signal frequency-converted by the frequency conversion module to the charging signal transmitting module according to the second switching instruction, which specifically includes:

[0023] When the baseband module receives a charging request, it selects a radio frequency module with an idle frequency band from at least two of the radio frequency modules, and obtains the position and occlusion situation of the client to be charged;

[0024] The baseband module generates a first switching instruction according to the position and occlusion situation of the client to be charged, so that the frequency switching module corresponding to the selected radio frequency module selects a frequency multiplier in the frequency conversion module to frequency-convert the radio frequency signal according to the first switching instruction;

[0025] The baseband module generates a second switching instruction according to the charging request, so that the antenna switching module corresponding to the selected radio frequency module sends the radio frequency signal frequency-converted by the frequency multiplier in the frequency conversion module to the charging signal transmitting module according to the second switching instruction.

[0026] As a preferred solution, the baseband module generates a first switching instruction according to the position of the client to be charged and the occlusion situation, so that the frequency switching module corresponding to the selected radio frequency module selects a frequency multiplier in the frequency conversion module to perform frequency conversion on the radio frequency signal, specifically including:

[0027] The baseband module determines a target frequency multiplication frequency according to the position of the client to be charged and the occlusion situation;

[0028] When the baseband module detects that the position of the client to be charged meets a preset long-distance condition or the client to be charged is blocked by an obstacle, it generates a first switching instruction, and the first switching instruction is used to control the frequency switching module corresponding to the selected radio frequency module to select a frequency multiplier corresponding to the target frequency multiplication frequency to perform frequency conversion on the radio frequency signal, wherein the frequency multiplication frequency of the frequency multiplier is within a preset low frequency multiplication frequency range;

[0029] When the baseband module detects that the position of the client to be charged meets a preset short-distance condition and the client to be charged is not blocked by an obstacle, it generates a first switching instruction, and the first switching instruction is used to control the frequency switching module corresponding to the selected radio frequency module to select a frequency multiplier corresponding to the target frequency multiplication frequency to perform frequency conversion on the radio frequency signal, wherein the frequency multiplication frequency of the frequency multiplier is within a preset high frequency multiplication frequency range.

[0030] As a preferred solution, the radio frequency front-end circuit further includes a first matching network, a power amplifier, a second matching network and a filter;

[0031] The frequency switching module and the frequency conversion module are respectively electrically connected to the first matching network, and the first matching network is sequentially electrically connected to the antenna selection module through the power amplifier, the second matching network and the filter.

[0032] As a preferred solution, the charging signal transmitting module is a MIMO antenna array.

[0033] As a preferred solution, the WiFi signal transmitting module is a single antenna.

[0034] To solve the same technical problem, an embodiment of the present invention further provides a wireless network device, including the radio frequency front-end circuit.

[0035] Compared with the prior art, the beneficial effects of the embodiments of the present invention are as follows: The embodiments of the present invention provide a radio frequency front-end circuit and a wireless network device. The radio frequency front-end circuit includes a frequency conversion module, a frequency switching module, an antenna switching module, a Wi-Fi signal transmitting module, and a charging signal transmitting module. The frequency switching module is configured to receive a first switching instruction and send a radio frequency signal to the antenna switching module according to the first switching instruction, or send the radio frequency signal to the frequency conversion module for frequency conversion according to the first switching instruction. The antenna switching module is configured to receive a second switching instruction and send the radio frequency signal sent by the frequency switching module to the Wi-Fi signal transmitting module according to the second switching instruction, or send the radio frequency signal frequency-converted by the frequency conversion module to the charging signal transmitting module according to the second switching instruction. The Wi-Fi signal transmitting module is configured to transmit a Wi-Fi communication signal according to the radio frequency signal sent by the antenna switching module. The charging signal transmitting module is configured to transmit a wireless charging signal according to the radio frequency signal sent by the antenna switching module and frequency-converted by the frequency conversion module, so as to be able to achieve wireless charging and communication, with diverse functions and a wider range of application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a circuit block diagram of the radio frequency front-end circuit in the embodiments of the present invention;

[0037] Figure 2 is a circuit schematic diagram of the radio frequency front-end circuit in the embodiments of the present invention;

[0038] Figure 3 is Figure 2 the working schematic diagram of the radio frequency front-end circuit of

[0039] Figure 4 is a circuit schematic diagram of another implementation manner of the radio frequency front-end circuit in the embodiments of the present invention;

[0040] wherein, 10, frequency conversion module; 20, frequency switching module; 30, antenna switching module; 40, Wi-Fi signal transmitting module; 50, charging signal transmitting module. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0042] Please refer to Figure 1As shown in the figure, the RF front-end circuit of the embodiment of the present invention includes a frequency conversion module 10, a frequency switching module 20, an antenna switching module 30, a WiFi signal transmitting module 40, and a charging signal transmitting module 50;

[0043] The frequency switching module 20 is configured to receive a first switching instruction, and send a radio frequency signal to the antenna switching module 30 according to the first switching instruction, or send the radio frequency signal to the frequency conversion module 10 for frequency conversion according to the first switching instruction;

[0044] The antenna switching module 30 is configured to receive a second switching instruction, and send the radio frequency signal sent by the frequency switching module 20 to the WiFi signal transmitting module 40 according to the second switching instruction, or send the radio frequency signal frequency-converted by the frequency conversion module 10 to the charging signal transmitting module 50 according to the second switching instruction;

[0045] The WiFi signal transmitting module 40 is configured to transmit a WiFi communication signal according to the radio frequency signal sent by the antenna switching module 30;

[0046] The charging signal transmitting module 50 is configured to transmit a wireless charging signal according to the radio frequency signal sent by the antenna switching module 30 and frequency-converted by the frequency conversion module 10.

[0047] In the embodiment of the present invention, the RF front-end circuit includes a frequency conversion module 10, a frequency switching module 20, an antenna switching module 30, a WiFi signal transmitting module 40, and a charging signal transmitting module 50; the frequency switching module 20 is configured to receive a first switching instruction, and send a radio frequency signal to the antenna switching module 30 according to the first switching instruction, or send the radio frequency signal to the frequency conversion module 10 for frequency conversion according to the first switching instruction; the antenna switching module 30 is configured to receive a second switching instruction, and send the radio frequency signal sent by the frequency switching module 20 to the WiFi signal transmitting module 40 according to the second switching instruction, or send the radio frequency signal frequency-converted by the frequency conversion module 10 to the charging signal transmitting module 50 according to the second switching instruction; the WiFi signal transmitting module 40 is configured to transmit a WiFi communication signal according to the radio frequency signal sent by the antenna switching module 30; the charging signal transmitting module 50 is configured to transmit a wireless charging signal according to the radio frequency signal sent by the antenna switching module 30 and frequency-converted by the frequency conversion module 10, so that wireless charging and communication can be realized, the functions are diversified, and the application scenarios are more extensive.

[0048] In specific implementation, the RF front-end circuit can be applied to wireless network devices (such as WiFi devices), for example, it can be a router, an AP, etc. Embodiments of the present invention utilize the existing WiFi technology and integrate the technical characteristics of wireless charging, enabling traditional wireless network devices to have the ability to wirelessly charge wireless devices (such as mobile phones, smart bracelets, etc.) connected to WiFi while providing WiFi signals, thereby greatly improving the practicality and functionality of traditional wireless network devices and changing the application scenario limitations of traditional wireless network devices.

[0049] Exemplarily, the frequency switching module 20 and the antenna switching module 30 can be, for example, RF switches, and the switching of RF signals is achieved through the RF switches. Exemplarily, the charging signal transmitting module 50 is a MIMO antenna array. The charging power of traditional radio wave charging is relatively small, while embodiments of the present invention introduce MIMO antenna array technology, which can effectively increase the charging power and shorten the charging time; in addition, the MIMO antenna array can achieve different transmitting antenna selections, for example, it can intelligently select the charging antenna for use at different distances, realizing the automatic optimization of wireless charging. Exemplarily, the WiFi signal transmitting module 40 is a single antenna. In the design of the antenna end, the single antenna has the advantage of better omnidirectionality and is suitable for WiFi communication. However, the single antenna has a large size and poor directivity, which is not conducive to the design of wireless charging. Therefore, embodiments of the present invention adopt the switching between a single antenna and a MIMO antenna array through an RF switch. When one frequency band uses a single antenna for WiFi communication, the other frequency band can be switched to the MIMO array antenna for wireless charging.

[0050] In an alternative embodiment, the RF front-end circuit further includes a baseband module and a radio frequency module;

[0051] The baseband module is used to generate control instructions, the first switching instruction, and the second switching instruction, and send the control instructions to the radio frequency module, the first switching instruction to the frequency switching module 20, and the second switching instruction to the antenna switching module 30;

[0052] The radio frequency module is used to generate an RF signal according to the control instructions and send the RF signal to the frequency switching module 20.

[0053] In embodiments of the present invention, the baseband module controls the radio frequency module, the frequency switching module 20, and the antenna switching module 30 respectively, enabling each module to work in coordination, thereby ensuring the normal operation of the circuit. The baseband module can be, for example, a baseband chip, and the radio frequency module can be, for example, a radio frequency chip. Under the control of the baseband chip, an RF signal can be generated by the radio frequency chip and sent to the frequency switching module 20.

[0054] In a specific application, the RF front-end circuit may further include a first matching network, a power amplifier, a second matching network, and a filter; the frequency switching module 20 and the frequency conversion module 10 are respectively electrically connected to the first matching network, and the first matching network is sequentially connected to the antenna selection module through the power amplifier, the second matching network, and the filter.

[0055] In an optional implementation manner, the number of the RF modules, the frequency switching modules 20, the antenna switching modules 30, and the WiFi signal transmitting modules 40 is at least two, and at least two of the RF modules, at least two of the frequency switching modules 20, at least two of the antenna switching modules 30, and at least two of the WiFi signal transmitting modules 40 are in a one-to-one correspondence relationship;

[0056] Among them, when the baseband module receives a charging request, it selects an RF module with an idle frequency band from at least two RF modules, and generates a first switching instruction and a second switching instruction according to the charging request, so that the frequency switching module 20 corresponding to the selected RF module sends the RF signal of the selected RF module to the frequency conversion module 10 for frequency conversion, and the antenna switching module 30 corresponding to the selected RF module sends the RF signal frequency-converted by the frequency conversion module 10 to the charging signal transmitting module 50 according to the second switching instruction.

[0057] Exemplarily, when the client is a mobile phone, since the current WiFi network is mostly controlled by a mobile phone app, when the user has a charging requirement, the wireless network device (such as a router) can be configured to enter the charging mode through the mobile phone app.

[0058] In a specific implementation, when the charging signal transmitting module 50 transmits a wireless charging signal, at least one of the WiFi signal transmitting modules 40 transmits a WiFi communication signal; wherein, the frequency band of the wireless charging signal is different from the frequency band of the WiFi communication signal transmitted by at least one of the WiFi signal transmitting modules 40.

[0059] The embodiments of the present invention can be applied to dual-band, triple-band, or other multi-band designs, such as Figure 2 A design for application in dual-band, Figure 4The design is for application in the three - band scenario. For designs applied to more bands, the required devices can be increased accordingly. For example, general WiFi devices often include two wireless bands, such as 2.4G and 5G. Utilizing the characteristics of dual - band WiFi, when one band is used for WiFi communication, the other band can be used for wireless charging. This enables traditional WiFi devices to have the ability to wirelessly charge the wireless devices connected to the WiFi while conducting WiFi communication. Please refer to Figure 2 and Figure 3 As shown, the number of the radio - frequency modules is two, namely radio - frequency chip 1 and radio - frequency chip 2; the number of the frequency - switching module 20 is two, namely radio - frequency switch 1 and radio - frequency switch 3; the number of the antenna - switching module 30 is two, namely radio - frequency switch 2 and radio - frequency switch 4; the number of the WiFi signal - transmitting module 40 is two, both being single - antenna. When in the non - wireless - charging mode and during normal WiFi communication, the baseband controls radio - frequency switches 1 - 4, so that the WiFi communication signals of band 1 and band 2 are transmitted through the single - antenna and reach the client. For a single client, at the same time, it can only connect to a WiFi network of 1 band (such as 2G) for communication. At this time, the baseband chip detects that band 2 is in an idle state (such as 5G). When wireless charging is required, the baseband controls radio - frequency switch 3 to switch the radio - frequency signal of band 2 to the frequency - conversion module 10. After passing through the frequency - conversion module 10, the frequency of the original radio - frequency signal will change. After being amplified by the power amplifier, it reaches radio - frequency switch 4. The baseband controls radio - frequency switch 4 to input the radio - frequency signal into the MIMO antenna array. The MIMO antenna array concentrates and transmits the radio - frequency signal to the client. After the signal passes through the signal - conversion circuit of the client, wireless charging is carried out. Finally, while the signal of band 1 is used for WiFi communication, the signal of band 2 is converted by the frequency - conversion module 10 and then used for wireless charging.

[0060] In an alternative embodiment, the frequency - conversion module 10 includes at least two frequency multipliers; then when the baseband module receives a charging request, it selects a radio - frequency module with an idle band from at least two of the radio - frequency modules, and generates a first switching instruction and a second switching instruction according to the charging request, so that the frequency - switching module 20 corresponding to the selected radio - frequency module sends the radio - frequency signal of the selected radio - frequency module to the frequency - conversion module 10 for frequency conversion, and the antenna - switching module 30 corresponding to the selected radio - frequency module sends the radio - frequency signal frequency - converted by the frequency - conversion module 10 to the charging - signal transmitting module 50, specifically including:

[0061] When the baseband module receives a charging request, it selects a radio - frequency module with an idle band from at least two of the radio - frequency modules, and obtains the position and occlusion situation of the client to be charged;

[0062] The baseband module generates a first switching instruction according to the position and occlusion condition of the client to be charged, so that the frequency switching module 20 corresponding to the selected radio frequency module selects a frequency multiplier in the frequency conversion module 10 to perform frequency conversion on the radio frequency signal according to the first switching instruction;

[0063] The baseband module generates a second switching instruction according to the charging request, so that the antenna switching module 30 corresponding to the selected radio frequency module sends the radio frequency signal frequency-converted by the frequency multiplier in the frequency conversion module 10 to the charging signal transmitting module 50 according to the second switching instruction.

[0064] In specific implementation, frequency conversion can be performed according to the distance of the client from the WiFi providing device (such as a router) and whether there are obstacles, so as to adapt to wireless charging in various situations and obtain a better charging effect. Through the frequency multiplier selection network, when the position information of the client to be charged is detected, the WiFi signal is selected and frequency-converted to different frequency bands. The frequency multiplier selection network and the MIMO array antenna selection network are adopted to realize different charging signal frequencies and transmitting antenna selections, and the automatic optimization of wireless charging is realized.

[0065] Specifically, the baseband module generates a first switching instruction according to the position and occlusion condition of the client to be charged, so that the frequency switching module 20 corresponding to the selected radio frequency module selects a frequency multiplier in the frequency conversion module 10 to perform frequency conversion on the radio frequency signal according to the first switching instruction, which specifically includes:

[0066] The baseband module determines the target frequency multiplication frequency according to the position and occlusion condition of the client to be charged;

[0067] When the baseband module detects that the position of the client to be charged meets the preset long-distance condition or the client to be charged is blocked by an obstacle, it generates a first switching instruction, and the first switching instruction is used to control the frequency switching module 20 corresponding to the selected radio frequency module to select a frequency multiplier corresponding to the target frequency multiplication frequency to perform frequency conversion on the radio frequency signal, wherein the frequency multiplication frequency of the frequency multiplier is within a preset low frequency multiplication frequency range;

[0068] When the baseband module detects that the position of the client to be charged meets the preset short-distance condition and the client to be charged is not blocked by an obstacle, it generates a first switching instruction, and the first switching instruction is used to control the frequency switching module 20 corresponding to the selected radio frequency module to select a frequency multiplier corresponding to the target frequency multiplication frequency to perform frequency conversion on the radio frequency signal, wherein the frequency multiplication frequency of the frequency multiplier is within a preset high frequency multiplication frequency range.

[0069] Please refer toFigure 2 As shown, in an embodiment of the present invention, the frequency conversion module 10 includes at least two frequency multipliers. A frequency multiplier network can be formed by paralleling at least two frequency multipliers, and the frequencies converted by each frequency multiplier are different. The baseband detects the delay and signal strength of the client through the WiFi communication network in Band 1, so as to judge the distance of the client from the WiFi providing device (such as a router) and whether there are obstacles blocking. Utilizing the characteristics that low-frequency signals have strong obstacle penetration ability and low spatial attenuation, when there are obstacles blocking or the distance is far, the baseband controls the RF switch 1 or 3 to select a frequency multiplier with a lower frequency doubling frequency for frequency conversion of the wireless charging signal. When the client is close and there are no obstacles blocking, the baseband controls the RF switch 1 or 3 to select a frequency multiplier with a higher frequency doubling frequency for frequency conversion of the wireless charging signal. The higher the frequency of the signal, the smaller the size design of the MIMO antenna array can be, the higher the integration degree, and the more antenna arrays can be accommodated. Therefore, when the frequency is higher, the MIMO antenna array can use technologies such as phase coherence to make the directivity and intensity of the charging signal sent to the client better, and the wireless charging effect is better.

[0070] Correspondingly, an embodiment of the present invention further provides a wireless network device, which includes the RF front-end circuit in the above embodiment.

[0071] Compared with the prior art, the beneficial effects of the embodiment of the present invention are as follows: The embodiment of the present invention provides an RF front-end circuit and a wireless network device. Among them, the RF front-end circuit includes a frequency conversion module 10, a frequency switching module 20, an antenna switching module 30, a WiFi signal transmitting module 40, and a charging signal transmitting module 50. The frequency switching module 20 is configured to receive a first switching instruction and send the RF signal to the antenna switching module 30 according to the first switching instruction, or send the RF signal to the frequency conversion module 10 for frequency conversion according to the first switching instruction. The antenna switching module 30 is configured to receive a second switching instruction and send the RF signal sent by the frequency switching module 20 to the WiFi signal transmitting module 40 according to the second switching instruction, or send the RF signal frequency-converted by the frequency conversion module 10 to the charging signal transmitting module 50 according to the second switching instruction. The WiFi signal transmitting module 40 is configured to transmit a WiFi communication signal according to the RF signal sent by the antenna switching module 30. The charging signal transmitting module 50 is configured to transmit a wireless charging signal according to the RF signal sent by the antenna switching module 30 and frequency-converted by the frequency conversion module 10, so as to be able to implement wireless charging and communication, with diverse functions and a wider application scenario.

[0072] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A radio frequency front-end circuit, characterized in that, It includes a frequency conversion module, a frequency switching module, an antenna switching module, a WiFi signal transmitting module, and a charging signal transmitting module; The frequency switching module is configured to receive a first switching instruction and send a radio frequency signal to the antenna switching module according to the first switching instruction, or send the radio frequency signal to the frequency conversion module for frequency conversion according to the first switching instruction; The antenna switching module is configured to receive a second switching instruction and send the radio frequency signal sent by the frequency switching module to the WiFi signal transmitting module according to the second switching instruction, or send the radio frequency signal frequency-converted by the frequency conversion module to the charging signal transmitting module according to the second switching instruction; The WiFi signal transmitting module is configured to transmit a WiFi communication signal according to the radio frequency signal sent by the antenna switching module; The charging signal transmitting module is configured to transmit a wireless charging signal according to the radio frequency signal sent by the antenna switching module and frequency-converted by the frequency conversion module; Wherein, if the first switching instruction and the second switching instruction are generated according to a charging request, the first switching instruction is used to send a radio frequency signal to the frequency conversion module for frequency conversion; the second switching instruction is used to send the radio frequency signal frequency-converted by the frequency conversion module to the charging signal transmitting module; The radio frequency front-end circuit further includes a baseband module and a radio frequency module; The baseband module is configured to generate a control instruction, the first switching instruction, and the second switching instruction, send the control instruction to the radio frequency module, send the first switching instruction to the frequency switching module, and send the second switching instruction to the antenna switching module; The radio frequency module is configured to generate a radio frequency signal according to the control instruction and send the radio frequency signal to the frequency switching module.

2. The RF front-end circuit according to claim 1, wherein The number of the radio frequency module, the frequency switching module, the antenna switching module, and the WiFi signal transmitting module is at least two, and at least two of the radio frequency modules, at least two of the frequency switching modules, at least two of the antenna switching modules, and at least two of the WiFi signal transmitting modules are in a one-to-one correspondence relationship; Wherein, when the baseband module receives a charging request, it selects a radio frequency module with an idle frequency band from at least two radio frequency modules, and generates a first switching instruction and a second switching instruction according to the charging request, so that the frequency switching module corresponding to the selected radio frequency module sends the radio frequency signal of the selected radio frequency module to the frequency conversion module for frequency conversion according to the first switching instruction, and the antenna switching module corresponding to the selected radio frequency module sends the radio frequency signal frequency-converted by the frequency conversion module to the charging signal transmitting module according to the second switching instruction.

3. The RF front-end circuit according to claim 2, characterized in that When the charging signal transmitting module transmits a wireless charging signal, at least one of the WiFi signal transmitting modules transmits a WiFi communication signal; wherein, the frequency band of the wireless charging signal is different from the frequency band of the WiFi communication signal transmitted by at least one of the WiFi signal transmitting modules.

4. The RF front-end circuit according to claim 2, wherein The frequency conversion module includes at least two frequency multipliers; when the baseband module receives a charging request, it selects a radio frequency module with an idle frequency band from at least two radio frequency modules, and generates a first switching instruction and a second switching instruction according to the charging request, so that the frequency switching module corresponding to the selected radio frequency module sends the radio frequency signal of the selected radio frequency module to the frequency conversion module for frequency conversion according to the first switching instruction, and the antenna switching module corresponding to the selected radio frequency module sends the radio frequency signal frequency-converted by the frequency conversion module to the charging signal transmitting module according to the second switching instruction, specifically including: When the baseband module receives a charging request, it selects a radio frequency module with an idle frequency band from at least two radio frequency modules, and obtains the position and occlusion condition of the client to be charged; The baseband module generates a first switching instruction according to the position and occlusion condition of the client to be charged, so that the frequency switching module corresponding to the selected radio frequency module selects a frequency multiplier in the frequency conversion module to perform frequency conversion on the radio frequency signal according to the first switching instruction; The baseband module generates a second switching instruction according to the charging request, so that the antenna switching module corresponding to the selected radio frequency module sends the radio frequency signal frequency-converted by the frequency multiplier in the frequency conversion module to the charging signal transmitting module according to the second switching instruction.

5. The RF front-end circuit according to claim 4, wherein The baseband module generates a first switching instruction according to the position and occlusion condition of the client to be charged, so that the frequency switching module corresponding to the selected radio frequency module selects a frequency multiplier in the frequency conversion module to perform frequency conversion on the radio frequency signal according to the first switching instruction, specifically including: The baseband module determines the target frequency multiplication frequency according to the position and occlusion condition of the client to be charged; When the baseband module detects that the position of the client to be charged meets the preset long-distance condition or the client to be charged is blocked by an obstacle, it generates a first switching instruction, and the first switching instruction is used to control the frequency switching module corresponding to the selected radio frequency module to select a frequency multiplier corresponding to the target frequency multiplication frequency to perform frequency conversion on the radio frequency signal, wherein the frequency multiplication frequency of the frequency multiplier is within a preset low frequency multiplication frequency range; When the baseband module detects that the position of the client to be charged meets the preset short-distance condition and the client to be charged is not blocked by an obstacle, it generates a first switching instruction, and the first switching instruction is used to control the frequency switching module corresponding to the selected radio frequency module to select a frequency multiplier corresponding to the target frequency multiplication frequency to perform frequency conversion on the radio frequency signal, wherein the frequency multiplication frequency of the frequency multiplier is within a preset high frequency multiplication frequency range.

6. The RF front-end circuit according to claim 1, characterized in that, The radio frequency front-end circuit further includes a first matching network, a power amplifier, a second matching network and a filter; The frequency switching module and the frequency conversion module are respectively electrically connected to the first matching network, and the first matching network is sequentially electrically connected to the antenna selection module through the power amplifier, the second matching network and the filter.

7. The radio frequency front-end circuit according to any one of claims 1-6, characterized in that, The charging signal transmitting module is a MIMO antenna array.

8. The radio frequency front-end circuit according to any one of claims 1-6, characterized in that The WiFi signal transmitting module is a single antenna.

9. A wireless network device, characterized in that, It includes the RF front-end circuit according to any one of claims 1-8.

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