CN114243952A - Radio frequency front-end circuit and wireless network equipment - Google Patents
Radio frequency front-end circuit and wireless network equipment Download PDFInfo
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- CN114243952A CN114243952A CN202111414062.3A CN202111414062A CN114243952A CN 114243952 A CN114243952 A CN 114243952A CN 202111414062 A CN202111414062 A CN 202111414062A CN 114243952 A CN114243952 A CN 114243952A
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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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- 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 a wireless network device, 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 WiFi communication signals according to the radio-frequency signals transmitted by the antenna switching module; the charging signal transmitting module transmits a wireless charging signal according to the radio-frequency signal which is transmitted by the antenna switching module and is subjected to frequency conversion by the frequency conversion module, so that wireless charging and communication can be realized.
Description
Technical Field
The invention relates to the technical field of wireless charging, in particular to a radio frequency front-end circuit and wireless network equipment.
Background
At present, the existing wireless charging technology mainly has the following three technical schemes:
a) electromagnetic induction type
The alternating current with a certain frequency of the primary coil generates a certain current in the secondary coil through electromagnetic induction, so that energy is transferred from a transmission end to a receiving end. The most common charging solutions at present use electromagnetic induction, such as the wireless charging solutions of mobile phones. The charging base and the mobile phone terminal are respectively provided with a built-in coil, when the charging base and the mobile phone terminal are close to each other, the transmitting coil generates a certain current in the mobile phone receiving coil through electromagnetic induction based on alternating current with a certain frequency, so that point energy is transferred from the transmitting end to the receiving end, and the mobile phone is supplied with power from the charging base. However, wireless charging by electromagnetic induction has a disadvantage that it is difficult to perform wireless charging transmission over a long distance, because the principle is simple and the manufacturing is easy.
b) Magnetic field resonance
Consisting of an energy transmission device and an energy receiving device, which can exchange energy with each other when both devices are tuned to the same frequency, or resonate at a specific frequency, is a technology that is currently being studied. Compared with electromagnetic induction, the wireless charging realizes charging with longer transmission distance based on a magnetic resonance mode. However, because both are required to be at the same resonant frequency, there are high frequency limitations and use limitations on the transmitting and receiving devices.
c) Radio wave type
The principle can be briefly summarized as converting ambient electromagnetic waves into a charging current. The wireless charging mode has the transmission distance larger than 10 meters, is suitable for long-distance low-power charging, and can realize automatic charging at any time and any place. However, for reasons of low conversion efficiency, the charging time will be relatively long if this is done.
However, the conventional wireless charging method merely performs charging, and thus has a relatively single function and a relatively limited application scenario.
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 are capable of implementing charging and communication.
In order to solve the above technical problem, an embodiment of the present invention provides a radio frequency front end circuit, which 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 used for receiving a first switching instruction, and sending a radio frequency signal to the antenna switching module according to the first switching instruction, or sending 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 sending the radio-frequency signal sent by the frequency switching module to the WiFi signal transmitting module according to the second switching instruction, or sending 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 sent by the antenna switching module;
the charging signal transmitting module is used for transmitting a wireless charging signal according to the radio frequency signal which is sent by the antenna switching module and is subjected to frequency conversion by the frequency conversion module.
As a preferred scheme, the radio frequency front-end circuit further includes 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, and sending the control instruction to the radio frequency module, the first switching instruction is sent to the frequency switching module, and the second switching instruction is sent 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 scheme, the number of the radio frequency modules, the number of the frequency switching modules, the number of the antenna switching modules and the number of the WiFi signal transmitting modules are 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 all in a one-to-one correspondence relationship;
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 a 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 an antenna switching module corresponding to the selected radio frequency module 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.
As a preferred scheme, when the charging signal transmitting module transmits a wireless charging signal, at least one WiFi signal transmitting module transmits a WiFi communication signal; 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.
As a preferred scheme, the frequency conversion module comprises at least two frequency multipliers; when receiving a charging request, the baseband module selects a radio frequency module with a frequency band in an idle state from the 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 subjected to frequency conversion by the frequency conversion module to the charging signal transmitting module according to the second switching instruction, which specifically includes:
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 acquires the position and the shielding condition of a client to be charged;
the baseband module generates a first switching instruction according to the position and the shielding condition of the client to be charged, so that a frequency switching module corresponding to the selected radio frequency module selects a frequency multiplier in the frequency conversion module to carry out frequency conversion on 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 scheme, the baseband module generates a first switching instruction according to the position and the 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, specifically including:
the baseband module determines a target frequency doubling frequency according to the position and the shielding condition of the client to be charged;
the baseband module generates a first switching instruction when detecting that the position of the client to be charged meets a preset remote condition or the client to be charged is shielded by an obstacle, 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 within a preset low frequency multiplication frequency range;
the baseband module generates a first switching instruction when detecting that the position of the client to be charged meets a preset close-range condition and the client to be charged is not shielded by an obstacle, 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 within a preset high frequency multiplication frequency range.
Preferably, 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 electrically connected with the first matching network, and the first matching network is electrically connected with the antenna selection module sequentially through the power amplifier, the second matching network and the filter.
As a preferred scheme, the charging signal transmitting module is a MIMO antenna array.
As a preferred scheme, the WiFi signal transmitting module is a single antenna.
In order 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.
Compared with the prior art, the embodiment of the invention has the beneficial effects that: the embodiment of the invention provides a radio frequency front-end circuit and wireless network equipment, wherein 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 sending the radio-frequency signal to the antenna switching module according to the first switching instruction, or sending 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 sending the radio-frequency signal sent by the frequency switching module to the WiFi signal transmitting module according to the second switching instruction, or sending 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 sent by the antenna switching module; the charging signal transmitting module is used for transmitting a wireless charging signal according to the radio-frequency signal which is sent by the antenna switching module and is subjected to frequency conversion by the frequency conversion module, so that wireless charging and communication can be realized, functions are diversified, and application scenes are wider.
Drawings
Fig. 1 is a circuit block diagram of an rf front-end circuit in an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of an rf front-end circuit according to an embodiment of the present invention;
fig. 3 is a schematic diagram of the operation of the rf front-end circuit of fig. 2;
fig. 4 is a circuit schematic diagram of another implementation of an rf front-end circuit in an embodiment of the invention;
10, a frequency conversion module; 20. a frequency switching module; 30. an antenna switching module; 40. a WiFi signal transmitting module; 50. and a charging signal transmitting module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the rf front-end circuit according to 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;
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 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 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.
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 the 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 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 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 which is transmitted by the antenna switching module 30 and is subjected to frequency conversion by the frequency conversion module 10, so as to achieve wireless charging and communication, and have diversified functions, so that the application scenarios are wider.
In the specific implementation, the radio frequency front-end circuit can be applied to wireless network equipment (such as WiFi equipment), such as a router, an AP and the like.
Illustratively, the frequency switching module 20 and the antenna switching module 30 may be, for example, radio frequency switches, and switching of radio frequency signals is realized through the radio frequency switches. Illustratively, the charging signal transmitting module 50 is a MIMO antenna array. The traditional radio wave type charging power is smaller, but the embodiment of the invention introduces the MIMO antenna array technology to effectively improve the charging power and shorten the charging time; in addition, the MIMO antenna array can realize different transmission antenna selections, for example, charging antennas used in a long distance and a short distance can be intelligently selected, and automatic optimization of wireless charging is realized. Illustratively, the WiFi signal transmitting module 40 is a single antenna, and the design of the antenna end, the single antenna has the advantage of better omni-directionality, and is suitable for WiFi communication. However, the single antenna has a large size and poor directivity, which is not favorable for wireless charging design. Therefore, the embodiment of the invention adopts the single antenna and the MIMO antenna array to be switched through the radio frequency switch, when one frequency band uses the single antenna to carry out WiFi communication, the other frequency band can be switched to the MIMO array antenna to carry out wireless charging.
In an optional embodiment, the rf front-end circuit further includes a baseband module and an rf 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, where the first switching instruction is sent to the frequency switching module 20, and the second switching instruction is sent 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 coordination, thereby ensuring that the circuit operates normally. 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; 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 optional embodiment, the number of the radio frequency modules, the frequency switching module 20, the antenna switching module 30, and the WiFi signal transmitting modules 40 is at least two, and at least two of the radio frequency 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 all in a one-to-one correspondence relationship;
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 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 subjected to frequency conversion by the frequency conversion module 10 to the charging signal transmitting module 50 according to the second switching instruction.
Illustratively, when the client is a mobile phone, since the WiFi network is now controlled by the mobile phone app, when the user has a charging demand, the wireless network device (such as a router) may be configured by the mobile phone app to enter a charging mode.
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; 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 the design of double frequency, three frequency bands or multiple frequency bands, for example, the design applied to double frequency is shown in fig. 2, the design applied to three frequency bands is shown in fig. 4, and the required devices can be correspondingly added in the design applied to more frequency bands. For example, a general WiFi device often includes two wireless frequency bands, such as 2.4G and 5G, and by using the feature of dual-frequency WiFi, one frequency band is used for WiFi communication, and the other frequency band is used for wireless charging. Make traditional wiFi equipment when wiFi communication, possess the ability that carries out wireless charging to the wireless device who connects wiFi. Referring to fig. 2 and 3, the number of the radio frequency modules is two, and the two radio frequency modules are a radio frequency chip 1 and a radio frequency chip 2 respectively; the number of the frequency switching modules 20 is two, and the frequency switching modules are respectively a radio frequency switch 1 and a radio frequency switch 3; the number of the antenna switching modules 30 is two, and the two antenna switching modules are respectively a radio frequency switch 2 and a radio frequency switch 4; the number of the WiFi signal transmitting modules 40 is two, and both are single antennas. When the wireless charging mode is in a non-wireless charging mode and normal WiFi communication is performed, the baseband controls the radio frequency switches 1-4, so that WiFi communication signals of the frequency band 1 and the frequency band 2 are transmitted out through the single antenna and reach a client. For a single client, only 1 band of WiFi networks (e.g. 2G) can be connected to communicate 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 control radio frequency switch 3 switches 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 radio frequency signal reaches the radio frequency switch 4. The base band controls the radio frequency switch 4 to input radio frequency signals to the MIMO antenna array, the MIMO antenna array transmits the radio frequency signals to the client in a centralized manner, and the signals are wirelessly charged after passing through a signal conversion circuit of the client. Finally, when the WiFi communication of the signals of the frequency band 1 is completed, the signals of the frequency band 2 are wirelessly charged after being converted by the frequency conversion module 10.
In an alternative embodiment, the frequency conversion module 10 includes at least two frequency multipliers; 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 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 subjected to 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 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 acquires the position and the shielding condition of a client to be charged;
the baseband module generates a first switching instruction according to the position and the 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 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 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 specific implementation, the frequency conversion can be performed according to the distance between the client and the WiFi providing device (such as a router) and the situation of whether an obstacle blocks the WiFi providing device, so as to adapt to wireless charging under various situations, and obtain a better charging effect. And selecting a network through a frequency multiplier, and selectively converting the WiFi signal to different frequency bands when the position information of the client to be charged is detected. And a frequency multiplier selection network and an MIMO 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 generating, by the baseband module, a first switching instruction according to the position and the 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 perform frequency conversion on the radio frequency signal according to the first switching instruction specifically includes:
the baseband module determines a target frequency doubling frequency according to the position and the shielding condition of the client to be charged;
the baseband module generates a first switching instruction when detecting that the position of the client to be charged meets a preset remote condition or the client to be charged is blocked by an obstacle, 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 doubling frequency to carry out frequency conversion on the radio frequency signal, and the frequency doubling frequency of the frequency multiplier is in a preset low frequency doubling frequency range;
and when detecting that the position of the client to be charged meets a preset close-range condition and the client to be charged is not shielded by an obstacle, the baseband module generates a first switching instruction, wherein 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, and the frequency multiplication frequency of the frequency multiplier is within 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, which may be connected in parallel to form a frequency multiplier network, and the frequency converted by each frequency multiplier is different from the frequency converted by each other frequency multiplier. The baseband detects the delay and signal strength of the client through the WiFi communication network of the frequency band 1, thereby determining the distance between the client and the WiFi providing device (e.g., router) and whether there is an obstacle. The base band control radio frequency switch 1 or 3 selects a frequency multiplier with lower frequency multiplication frequency to carry out frequency conversion of the wireless charging signal when a barrier is shielded or the distance is longer by utilizing the characteristics that a low-frequency signal has strong barrier penetrating capability and low space attenuation. When the client is close and is not blocked by a barrier, the baseband control switch 1 or 3 selects a frequency multiplier with higher frequency multiplication frequency to perform frequency conversion of the wireless charging signal. The higher the frequency of the signal is, the smaller the size design of the MIMO antenna array is, the higher the integration level is, and the more antenna arrays can be accommodated. Therefore, as the frequency is higher, the MIMO antenna array utilizes the techniques such as phase coherence, and the directionality and intensity of the charging signal that can be transmitted to the client are better, and the wireless charging effect is better.
Correspondingly, an embodiment of the present invention further provides a wireless network device, which includes the radio frequency front-end circuit in the foregoing embodiment.
Compared with the prior art, the embodiment of the invention has the beneficial effects that: the embodiment of the invention provides a radio frequency front end circuit and wireless network equipment, wherein 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; the frequency switching module 20 is configured to receive a first switching instruction, and send the 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 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 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 which is transmitted by the antenna switching module 30 and is subjected to frequency conversion by the frequency conversion module 10, so as to achieve wireless charging and communication, and have diversified functions, so that the application scenarios are wider.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A 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 sending a radio frequency signal to the antenna switching module according to the first switching instruction, or sending 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 sending the radio-frequency signal sent by the frequency switching module to the WiFi signal transmitting module according to the second switching instruction, or sending 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 sent by the antenna switching module;
the charging signal transmitting module is used for transmitting a wireless charging signal according to the radio frequency signal which is sent by the antenna switching module and is subjected to frequency conversion by the frequency conversion module.
2. The rf front-end circuit of claim 1, further comprising a baseband module and an rf module;
the baseband module is used for generating a control instruction, the first switching instruction and the second switching instruction, and sending the control instruction to the radio frequency module, the first switching instruction is sent to the frequency switching module, and the second switching instruction is sent 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.
3. The rf front-end circuit according to claim 2, wherein the number of the rf modules, the frequency switching modules, the antenna switching modules, and the WiFi signal transmitting modules is at least two, and at least two of the rf 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 all in a one-to-one correspondence relationship;
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 a 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 an antenna switching module corresponding to the selected radio frequency module 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.
4. The radio frequency front-end circuit according to claim 3, wherein at least one of the WiFi signal transmitting modules transmits a WiFi communication signal when the charging signal transmitting module transmits a wireless charging signal; 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.
5. The radio frequency front-end circuit of claim 3, wherein the frequency conversion module comprises at least two frequency multipliers; when receiving a charging request, the baseband module selects a radio frequency module with a frequency band in an idle state from the 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 subjected to frequency conversion by the frequency conversion module to the charging signal transmitting module according to the second switching instruction, which specifically includes:
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 acquires the position and the shielding condition of a client to be charged;
the baseband module generates a first switching instruction according to the position and the shielding condition of the client to be charged, so that a frequency switching module corresponding to the selected radio frequency module selects a frequency multiplier in the frequency conversion module to carry out frequency conversion on 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.
6. The rf front-end circuit according to claim 5, wherein the baseband module generates a first switching instruction according to a position and an occlusion condition of the to-be-charged client, so that a frequency switching module corresponding to the selected rf module selects a frequency multiplier in the frequency conversion module to convert the rf signal according to the first switching instruction, specifically comprising:
the baseband module determines a target frequency doubling frequency according to the position and the shielding condition of the client to be charged;
the baseband module generates a first switching instruction when detecting that the position of the client to be charged meets a preset remote condition or the client to be charged is shielded by an obstacle, 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 within a preset low frequency multiplication frequency range;
the baseband module generates a first switching instruction when detecting that the position of the client to be charged meets a preset close-range condition and the client to be charged is not shielded by an obstacle, 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 within a preset high frequency multiplication frequency range.
7. 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 electrically connected with the first matching network, and the first matching network is electrically connected with the antenna selection module sequentially through the power amplifier, the second matching network and the filter.
8. The radio frequency front-end circuit of any one of claims 1-7, wherein the charging signal transmitting module is a MIMO antenna array.
9. The radio frequency front end circuit of any one of claims 1-7, wherein the WiFi signal transmission module is a single antenna.
10. A wireless network device comprising the radio frequency front end circuit according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111414062.3A CN114243952A (en) | 2021-11-25 | 2021-11-25 | Radio frequency front-end circuit and wireless network equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111414062.3A CN114243952A (en) | 2021-11-25 | 2021-11-25 | Radio frequency front-end circuit and wireless network equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023241285A1 (en) * | 2022-06-14 | 2023-12-21 | 中兴通讯股份有限公司 | Communication apparatus and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023241285A1 (en) * | 2022-06-14 | 2023-12-21 | 中兴通讯股份有限公司 | Communication apparatus and device |
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