CN114243952B - Radio frequency front-end circuit and wireless network device - Google Patents
Radio frequency front-end circuit and wireless network device Download PDFInfo
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- CN114243952B CN114243952B CN202111414062.3A CN202111414062A CN114243952B CN 114243952 B CN114243952 B CN 114243952B CN 202111414062 A CN202111414062 A CN 202111414062A CN 114243952 B CN114243952 B CN 114243952B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
- H02J50/23—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of transmitting antennas, e.g. directional array antennas or Yagi antennas
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/401—Circuits for selecting or indicating operating mode
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Signal Processing (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to the technical field of wireless charging, and discloses a radio frequency front-end circuit and wireless network equipment, wherein a first switching instruction is received through a frequency switching module, and a radio frequency signal is sent to an antenna switching module according to the first switching instruction, or the radio frequency signal is sent to a frequency conversion module for frequency conversion according to the first switching instruction; the antenna switching module receives a second switching instruction, and sends the radio frequency signal sent by the frequency switching module to the WiFi signal transmitting module according to the second switching instruction, or sends the radio frequency signal subjected to frequency conversion by the frequency conversion module to the charging signal transmitting module according to the second switching instruction, the WiFi signal transmitting module transmits a WiFi communication signal according to the radio frequency signal sent by the antenna switching module, and the charging signal transmitting module transmits a wireless charging signal according to the radio frequency signal sent by the antenna switching module and subjected to frequency conversion by the frequency conversion module, so that wireless charging and communication can be realized.
Description
Technical Field
The present invention relates to the field of wireless charging technologies, and in particular, to a radio frequency front end circuit and a wireless network device.
Background
At present, the existing wireless charging technology mainly comprises the following three technical schemes:
a) Electromagnetic induction type
An alternating current of a certain frequency is generated in the secondary coil by electromagnetic induction, so that energy is transferred from the transmitting end to the receiving end. The most common charging solutions today employ electromagnetic induction, such as the wireless charging solutions of current cell phones. The charging base and the mobile phone terminal are respectively internally provided with coils, when the charging base and the mobile phone terminal are close to each other, the transmitting coil generates certain current in the mobile phone receiving coil through electromagnetic induction based on alternating current with certain frequency, so that point energy is transferred from the transmitting end to the receiving end, and power supply from the charging base to the mobile phone is started. Because of the simple principle and easy fabrication, however, the disadvantage of wireless charging by electromagnetic induction is that it is difficult to perform long-distance wireless charging transmission.
B) Magnetic field resonance
It is a technology currently under study that consists of an energy transmitting device and an energy receiving device, which exchange energy with each other when the two devices are tuned to the same frequency or resonate at a specific frequency. Compared with electromagnetic induction, the wireless charging realizes the charging of a longer transmission distance based on the magnetic resonance mode. But because both are required to be at the same resonant frequency at the same time, there are high frequency and usage limitations for the transmitting and receiving devices.
C) Radio wave type
The principle can be briefly summarized as converting ambient electromagnetic waves into charging current. The wireless charging mode has a transmission distance of more than 10 meters, is suitable for long-distance low-power charging, and can realize automatic charging at any time and any place. However, if this is done, the charging time will be longer for reasons of lower conversion efficiency.
However, the conventional wireless charging method simply performs charging, so that the function is relatively single, and the application scenario is relatively limited.
Disclosure of Invention
An object of an embodiment of the present invention is to provide a radio frequency front-end circuit and a wireless network device, which can realize charging and communication.
In order to solve the technical problems, an embodiment of the invention provides a radio frequency front-end circuit, which comprises 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 used for receiving a first switching instruction and transmitting a radio frequency signal to the antenna switching module according to the first switching instruction, or transmitting the radio frequency signal to the frequency conversion module for frequency conversion according to the first switching instruction;
The antenna switching module is used for receiving a second switching instruction, and transmitting the radio frequency signal transmitted by the frequency switching module to the WiFi signal transmitting module according to the second switching instruction, or transmitting the radio frequency signal subjected to frequency conversion by the frequency conversion module to the charging signal transmitting module according to the second switching instruction;
the WiFi signal transmitting module is used for transmitting WiFi communication signals according to the radio frequency signals transmitted by the antenna switching module;
The charging signal transmitting module is used for transmitting wireless charging signals according to the radio frequency signals which are transmitted by the antenna switching module and subjected to frequency conversion by the frequency conversion module.
As a preferable scheme, the radio frequency front-end circuit further comprises a baseband module and a radio frequency module;
The baseband module is used for generating a control instruction, the first switching instruction and the second switching instruction, sending the control instruction to the radio frequency module, sending the first switching instruction to the frequency switching module, and sending the second switching instruction to the antenna switching module;
the radio frequency module is used for generating a radio frequency signal according to the control instruction and sending the radio frequency signal to the frequency switching module.
As a preferred solution, 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 the radio frequency module, the frequency switching module, the antenna switching module and the WiFi signal transmitting module are in a one-to-one correspondence;
When receiving a charging request, the baseband module selects a radio frequency module with a frequency band in an idle state 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 radio frequency signals 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 signals after frequency conversion by the frequency conversion module to the charging signal transmitting module according to the second switching instruction.
In an optimal scheme, when the charging signal transmitting module transmits wireless charging signals, at least one WiFi signal transmitting module transmits WiFi communication signals, wherein the frequency range of the wireless charging signals is different from the frequency range of the WiFi communication signals transmitted by at least one WiFi signal transmitting module.
When receiving a charging request, the baseband module selects a radio frequency module with an idle frequency band from at least two radio frequency modules, 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 a 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 converted by the frequency conversion module to the charging signal transmitting module according to the second switching instruction, wherein the method comprises the following steps:
when the baseband module receives a charging request, selecting a radio frequency module with a frequency band in an idle state from at least two radio frequency modules, and acquiring the position and shielding condition of a client to be charged;
The baseband module generates a first switching instruction according to the position and shielding condition of the client to be charged, so that the frequency switching module corresponding to the selected radio frequency module can select a frequency multiplier in the frequency conversion module to convert the radio frequency signal according to the first switching instruction;
and 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 subjected to frequency conversion by the frequency multiplier in the frequency conversion module to the charging signal transmitting module according to the second switching instruction.
As a preferred solution, the baseband module generates a first switching instruction according to the position and shielding 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 convert the radio frequency signal according to the first switching instruction, and specifically includes:
The baseband module determines a target frequency multiplication frequency according to the position and shielding condition of the client to be charged;
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, generating a first switching instruction, wherein the first switching instruction is used for controlling a frequency switching module corresponding to the selected radio frequency module to select a frequency multiplier corresponding to the target frequency multiplication frequency to carry out frequency conversion on the radio frequency signal, and the frequency multiplication frequency of the frequency multiplier is in a preset low frequency multiplication frequency range;
When the baseband module detects that the position of the client to be charged meets a preset close range condition and the client to be charged is not blocked by an obstacle, a first switching instruction is generated, and the first switching instruction is used for controlling a frequency switching module corresponding to the selected radio frequency module to select a frequency multiplier corresponding to the target frequency multiplication frequency to carry out frequency conversion on the radio frequency signal, wherein the frequency multiplication frequency of the frequency multiplier is in a preset high frequency multiplication frequency range.
As a preferred scheme, the radio frequency front-end circuit further comprises 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 and electrically connected with the first matching network, and the first matching network is electrically connected with the antenna selection module through the power amplifier, the second matching network and the filter in sequence.
Preferably, the charging signal transmitting module is an MO antenna array.
Preferably, the WiFi signal transmitting module is a single antenna.
In order to solve the same technical problems, the embodiment of the invention also provides wireless network equipment, which comprises the radio frequency front-end circuit.
Compared with the prior art, the radio frequency front-end circuit and the wireless network device have the beneficial effects that the radio frequency front-end circuit comprises 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 used for receiving a first switching instruction and transmitting radio frequency signals to the antenna switching module according to the first switching instruction or transmitting radio frequency signals to the frequency conversion module for frequency conversion according to the first switching instruction, the antenna switching module is used for receiving a second switching instruction and transmitting radio frequency signals transmitted by the frequency switching module to the Wi F i signal transmitting module according to the second switching instruction or transmitting radio frequency signals after frequency conversion by the frequency conversion module to the charging signal transmitting module according to the radio frequency signals transmitted by the antenna switching module, and the charging signal transmitting module is used for transmitting wireless charging signals according to the radio frequency signals transmitted by the antenna switching module and after frequency conversion by the frequency conversion module, so that wireless charging and communication can be realized, and the functions are diversified, and application scenes are wider.
Drawings
FIG. 1 is a circuit block diagram of a radio frequency front-end circuit in an embodiment of the invention;
FIG. 2 is a schematic circuit diagram of a radio frequency front end circuit in an embodiment of the invention;
FIG. 3 is a schematic diagram of the operation of the RF front-end circuit of FIG. 2;
FIG. 4 is a schematic circuit diagram of another implementation of the RF front-end circuit in an embodiment of the invention;
10, a frequency conversion module; 20 parts of frequency switching module, 30 parts of antenna switching module, 40 parts of Wi F i signal transmitting module and 50 parts of charging signal transmitting module.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, a radio frequency front-end circuit of the embodiment of the 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;
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 a 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 after frequency conversion 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 Wi fi communication signals according to the radio frequency signals 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 converted by the frequency conversion module 10.
In the embodiment of the invention, the radio frequency front-end circuit comprises 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, wherein the frequency switching module 20 is used for receiving a first switching instruction and transmitting radio frequency signals to the antenna switching module 30 according to the first switching instruction or transmitting radio frequency signals to the frequency conversion module 10 for frequency conversion according to the first switching instruction, the antenna switching module 30 is used for receiving a second switching instruction and transmitting radio frequency signals transmitted by the frequency switching module 20 to the WiFi signal transmitting module 40 according to the second switching instruction or transmitting radio frequency signals 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 used for transmitting WiFi communication signals according to the radio frequency signals transmitted by the antenna switching module 30 and transmitting wireless charging signals according to the radio frequency signals converted by the frequency conversion module 10, so that wireless charging and communication can be realized, and the application scenarios are wider.
In a specific implementation, the radio frequency front-end circuit can be applied to wireless network equipment (such as WiFi equipment), for example, a router, an AP and the like, and the embodiment of the invention utilizes the existing WiFi technology, integrates the technical characteristics of wireless charging, so that the traditional wireless network equipment has the capability of wirelessly charging the wireless equipment (such as a mobile phone, an intelligent bracelet and the like) connected with WiFi while providing WiFi signals, thereby greatly improving the practicability and the functionality of the traditional wireless network equipment and changing the application scene limitation of the traditional wireless network equipment.
The frequency switching module 20 and the antenna switching module 30 may be, for example, radio frequency switches, by means of which switching of radio frequency signals is achieved. Illustratively, the charging signal transmitting module 50 is an array of MI MO antennas. In addition, the MI MO antenna array can realize different transmitting antenna selection, for example, the charging antenna used in the process of long and short distance can be intelligently selected, and the automatic optimization of wireless charging is realized. The WiFi signal transmitting module 40 is illustratively a single antenna, which has the advantage of better omnidirectionality at the antenna end, and is suitable for WiFi communication. However, the single antenna has large size and poor directivity, which is not beneficial to the design of wireless charging. Therefore, the embodiment of the invention adopts the single antenna and the MI MO antenna array to switch through the radio frequency switch, and when one frequency band uses the single antenna to carry out WiFi communication, the other frequency band can be switched to the MI MO array antenna to carry out wireless charging.
In an alternative embodiment, 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, and send the control instruction 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;
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 20.
In the embodiment of the present invention, the baseband module controls the radio frequency module, the frequency switching module 20 and the antenna switching module 30 respectively, so that each module can work in a coordinated manner, thereby ensuring the normal operation of the circuit. The baseband module may be, for example, a baseband chip, and the radio frequency module may be, for example, a radio frequency chip, and under the control of the baseband chip, a radio frequency signal may be generated by the radio frequency chip and sent to the frequency switching module 20.
In a specific application, the radio frequency front-end circuit may further include a first matching network, a power amplifier, a second matching network and a filter, where the frequency switching module 20 and the frequency conversion module 10 are electrically connected to the first matching network, and the first matching network is electrically connected to the antenna selection module sequentially through the power amplifier, the second matching network and the filter.
In an alternative embodiment, the number of the radio frequency modules, the frequency switching modules 20, the antenna switching modules 30, and the WiFi signal transmitting modules 40 is at least two, and the at least two radio frequency modules, the at least two frequency switching modules 20, the at least two antenna switching modules 30, and the at least two WiFi signal transmitting modules 40 are in a one-to-one correspondence;
When receiving a charging request, the baseband module 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 20 corresponding to the selected radio frequency module sends a radio frequency signal of the selected radio frequency module to the frequency conversion module 10 for frequency conversion according to the first switching instruction, and the antenna switching module 30 corresponding to the selected radio frequency module sends the radio frequency signal after frequency conversion by the frequency conversion module 10 to the charging signal transmitting module 50 according to the second switching instruction.
For example, when the client is a mobile phone, since the WiFi network is currently controlled by the mobile phone app, when the user has a charging requirement, the wireless network device (such as a router) may be configured by the mobile phone app to enter the charging mode.
In an implementation, when the charging signal transmitting module 50 transmits a wireless charging signal, at least one WiFi signal transmitting module 40 transmits a Wi F i communication signal, where the frequency band of the wireless charging signal is different from the frequency band of the WiFi communication signal transmitted by at least one WiFi signal transmitting module 40.
The embodiment of the invention can be applied to dual-band, tri-band or equal multi-band designs, as shown in fig. 2, which is a design applied to dual-band, and fig. 4, which is a design applied to tri-band, and the design applied to more multi-band can correspondingly increase required devices. For example, a typical WiFi device often includes two wireless bands, such as 2.4G and 5G, and utilizes the features of dual-band WiFi, where one band is wirelessly charged while the other band is WiFi communication. The traditional WiFi device is enabled to carry out wireless charging on the wireless device connected with WiFi while WiFi communication is carried out. Referring to fig. 2 and 3, the number of the radio frequency modules is two, namely a radio frequency chip 1 and a radio frequency chip 2, the number of the frequency switching modules 20 is two, namely a radio frequency switch 1 and a radio frequency switch 3, the number of the antenna switching modules 30 is two, namely a radio frequency switch 2 and a radio frequency switch 4, and the number of the WiFi signal transmitting modules 40 is two, namely single antennas. When the wireless charging system is in a non-wireless charging mode and is in normal WiFi communication, the baseband controls the radio frequency switches 1-4, so that WiFi communication signals in the frequency band 1 and the frequency band 2 are transmitted through a single antenna and reach the client. For a single client, only 1 band of WiFi networks (e.g., 2G) can be connected for communication at the same time, and the baseband chip detects that band 2 is in an idle state (e.g., 5G). When wireless charging is needed, the baseband controls the radio frequency switch 3 to switch the radio frequency signal of the frequency band 2 to the frequency conversion module 10, after passing through the frequency conversion module 10, the frequency of the original radio frequency signal is changed, and after being amplified by the power amplifier, the original radio frequency signal reaches the radio frequency switch 4. The baseband controls the radio frequency switch 4 to input radio frequency signals to the M I MO antenna array, the M I MO antenna array transmits the radio frequency signals to the client in a concentrated mode, and the signals are subjected to wireless charging after passing through a signal conversion circuit of the client. And when the WiFi communication of the signals of the frequency band 1 is finally completed, the signals of the frequency band 2 are converted by the frequency conversion module 10 and then are subjected to wireless charging.
In an alternative embodiment, the frequency conversion module 10 includes at least two frequency multipliers, when the baseband module receives a charging request, 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 20 corresponding to the selected radio frequency module sends a radio frequency signal of the selected radio frequency module to the frequency conversion module 10 for frequency conversion according to the first switching instruction, and the antenna switching module 30 corresponding to the selected radio frequency module sends a radio frequency signal after frequency conversion by the frequency conversion module 10 to the charging signal transmitting module 50 according to the second switching instruction, which specifically includes:
when the baseband module receives a charging request, selecting a radio frequency module with a frequency band in an idle state from at least two radio frequency modules, and acquiring the position and shielding condition of a client to be charged;
The baseband module generates a first switching instruction according to the position and shielding 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 convert 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 30 corresponding to the selected radio frequency module sends the radio frequency signal after frequency conversion by the frequency multiplier in the frequency conversion module 10 to the charging signal transmitting module 50 according to the second switching instruction.
In the implementation, the frequency conversion can be performed according to the distance between the client and the position of the WiFi providing device (such as a router) and whether the client is shielded by an obstacle, so as to adapt to wireless charging under each condition, and further obtain a better charging effect. And selecting a network through a frequency multiplier, and selecting and frequency-converting the WiFi signals to different frequency bands when the position information of the client to be charged is detected. The frequency multiplier selection network and the M I MO array antenna selection network are adopted to realize different charging signal frequencies and transmitting antenna selection, and realize automatic optimization of wireless charging.
Specifically, the baseband module generates a first switching instruction according to the position and shielding condition of the client to be charged, so that the frequency switching module 20 corresponding to the selected radio frequency module selects the frequency multiplier in the frequency conversion module 10 to convert the radio frequency signal according to the first switching instruction, and specifically includes:
The baseband module determines a target frequency multiplication frequency according to the position and shielding condition of the client to be charged;
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, generating a first switching instruction, wherein the first switching instruction is used for controlling a frequency switching module 20 corresponding to the selected radio frequency module to select a frequency multiplier corresponding to the target frequency multiplication frequency to carry out frequency conversion on the radio frequency signal, and the frequency multiplication frequency of the frequency multiplier is in a preset low frequency multiplication frequency range;
When the baseband module detects that the position of the client to be charged meets a preset close range condition and the client to be charged is not blocked by an obstacle, a first switching instruction is generated, and the first switching instruction is used for controlling 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 carry out frequency conversion on the radio frequency signal, wherein the frequency multiplication frequency of the frequency multiplier is in a preset high frequency multiplication frequency range.
Referring to fig. 2, in the embodiment of the present invention, the frequency conversion module 10 includes at least two frequency multipliers, and a frequency multiplier network may be formed by connecting at least two frequency multipliers in parallel, where each frequency multiplier converts a radio frequency signal to a different frequency. The baseband detects the delay and the signal strength of the client through the WiFi communication network with the frequency band 1, so as to judge the distance between the client and the position of the WiFi providing equipment (such as a router) and whether the client is shielded by an obstacle. The low-frequency signal has the characteristics of strong barrier penetrating capability and low spatial attenuation, and when the barrier is blocked or the distance is far, the baseband controls the radio frequency switch 1 or 3 to select a frequency multiplier with lower frequency multiplication frequency so as to perform frequency conversion of the wireless charging signal. When the client is closer and no obstacle is present, the baseband controls the radio frequency switch 1 or 3 to select a frequency multiplier with higher frequency multiplication frequency to perform frequency conversion of the wireless charging signal. The higher the frequency of the signal, the smaller the size design of the M I MO antenna array, the higher the integration level, and the larger the number of antenna arrays that can be accommodated. Therefore, when the frequency is higher, the directivity and intensity of the charging signal which can be sent to the client are better, and the wireless charging effect is better by using the techniques such as phase coherence.
Correspondingly, the embodiment of the invention also provides wireless network equipment, which comprises the radio frequency front-end circuit in the embodiment.
Compared with the prior art, the radio frequency front-end circuit and the wireless network device have the advantages that the radio frequency front-end circuit comprises the frequency conversion module 10, the frequency switching module 20, the antenna switching module 30, the WiFi signal transmitting module 40 and the charging signal transmitting module 50, the frequency switching module 20 is used for receiving a first switching instruction and transmitting radio frequency signals to the antenna switching module 30 according to the first switching instruction or transmitting radio frequency signals to the frequency conversion module 10 for frequency conversion according to the first switching instruction, the antenna switching module 30 is used for receiving a second switching instruction and transmitting radio frequency signals transmitted by the frequency switching module 20 to the WiFi signal transmitting module 40 according to the second switching instruction or transmitting radio frequency signals converted by the frequency conversion module 10 to the charging signal transmitting module 50, the WiFi signal transmitting module 40 is used for transmitting WiFi communication signals according to the radio frequency signals transmitted by the antenna switching module 30, the charging signal transmitting module 50 is used for transmitting wireless charging signals according to the radio frequency signals converted by the frequency conversion module 10 and transmitted by the antenna switching module 30, and therefore wireless charging and communication can be achieved, and the wireless charging and communication can be diversified.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (9)
1. The radio frequency front-end circuit is characterized by comprising 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 used for receiving a first switching instruction and transmitting a radio frequency signal to the antenna switching module according to the first switching instruction, or transmitting the radio frequency signal to the frequency conversion module for frequency conversion according to the first switching instruction;
The antenna switching module is used for receiving a second switching instruction, and transmitting the radio frequency signal transmitted by the frequency switching module to the WiFi signal transmitting module according to the second switching instruction, or transmitting the radio frequency signal subjected to frequency conversion by the frequency conversion module to the charging signal transmitting module according to the second switching instruction;
the WiFi signal transmitting module is used for transmitting WiFi communication signals according to the radio frequency signals transmitted by the antenna switching module;
the charging signal transmitting module is used for transmitting wireless charging signals according to the radio frequency signals which are transmitted by the antenna switching module and subjected to frequency conversion by the frequency conversion module;
The first switching instruction and the second switching instruction are generated according to a charging request, and the first switching instruction is used for sending radio frequency signals to the frequency conversion module for frequency conversion;
the radio frequency front-end circuit also comprises a baseband module and a radio frequency module;
The baseband module is used for generating a control instruction, the first switching instruction and the second switching instruction, sending the control instruction to the radio frequency module, sending the first switching instruction to the frequency switching module, and sending the second switching instruction to the antenna switching module;
the radio frequency module is used for generating a radio frequency signal according to the control instruction and sending the radio frequency signal to the frequency switching module.
2. The radio frequency front-end circuit of claim 1, wherein the number of radio frequency modules, the frequency switching modules, the antenna switching modules, and the WiFi signal transmitting modules is at least two, and the at least two radio frequency modules, the at least two frequency switching modules, the at least two antenna switching modules, and the at least two WiFi signal transmitting modules are in a one-to-one correspondence;
When receiving a charging request, the baseband module selects a radio frequency module with a frequency band in an idle state 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 radio frequency signals 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 signals after frequency conversion by the frequency conversion module to the charging signal transmitting module according to the second switching instruction.
3. The radio frequency front-end circuit of claim 2, wherein at least one of the WiFi signal transmission modules transmits a WiFi communication signal when the charging signal transmission module transmits a wireless charging signal, and wherein the wireless charging signal is in a different frequency band than the WiFi communication signal transmitted by at least one of the WiFi signal transmission modules.
4. The radio frequency front-end circuit of claim 2, wherein the frequency conversion module comprises at least two frequency multipliers, and when the baseband module receives a charging request, a radio frequency module with an idle frequency band is selected from at least two radio frequency modules, and a first switching instruction and a second switching instruction are generated according to the charging request, so that the frequency switching module corresponding to the selected radio frequency module sends a 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 after frequency conversion by the frequency conversion module to the charging signal transmitting module according to the second switching instruction, and the radio frequency front-end circuit specifically comprises:
when the baseband module receives a charging request, selecting a radio frequency module with a frequency band in an idle state from at least two radio frequency modules, and acquiring the position and shielding condition of a client to be charged;
The baseband module generates a first switching instruction according to the position and shielding condition of the client to be charged, so that the frequency switching module corresponding to the selected radio frequency module can select a frequency multiplier in the frequency conversion module to convert the radio frequency signal according to the first switching instruction;
and 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 subjected to frequency conversion by the frequency multiplier in the frequency conversion module to the charging signal transmitting module according to the second switching instruction.
5. The radio frequency front-end circuit of claim 4, wherein the baseband module generates a first switching instruction according to the position and shielding 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 convert the radio frequency signal according to the first switching instruction, and specifically comprises:
The baseband module determines a target frequency multiplication frequency according to the position and shielding condition of the client to be charged;
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, generating a first switching instruction, wherein the first switching instruction is used for controlling a frequency switching module corresponding to the selected radio frequency module to select a frequency multiplier corresponding to the target frequency multiplication frequency to carry out frequency conversion on the radio frequency signal, and the frequency multiplication frequency of the frequency multiplier is in a preset low frequency multiplication frequency range;
When the baseband module detects that the position of the client to be charged meets a preset close range condition and the client to be charged is not blocked by an obstacle, a first switching instruction is generated, and the first switching instruction is used for controlling a frequency switching module corresponding to the selected radio frequency module to select a frequency multiplier corresponding to the target frequency multiplication frequency to carry out frequency conversion on the radio frequency signal, wherein the frequency multiplication frequency of the frequency multiplier is in a preset high frequency multiplication frequency range.
6. The radio frequency front-end circuit of claim 1, further comprising 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 and electrically connected with the first matching network, and the first matching network is electrically connected with the antenna selection module through the power amplifier, the second matching network and the filter in sequence.
7. The radio frequency front-end circuit of any of claims 1-6, wherein the charging signal transmission module is a MIMO antenna array.
8. The radio frequency front-end circuit of any of claims 1-6, wherein the WiFi signal transmission module is a single antenna.
9. A wireless network device comprising a radio frequency front-end circuit as claimed in any one of claims 1 to 8.
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| CN108270298B (en) * | 2017-01-04 | 2022-12-02 | 中兴通讯股份有限公司 | Charging method and device |
| CN112787419A (en) * | 2019-11-04 | 2021-05-11 | 北京小米移动软件有限公司 | Wireless charging transmitter, terminal and wireless charging method |
| WO2021217495A1 (en) * | 2020-04-29 | 2021-11-04 | 华为数字能源技术有限公司 | Long-distance wireless charging transmitting end, receiving end, and system |
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