CN117639298A - Radio frequency energy collector and electronic equipment - Google Patents
Radio frequency energy collector and electronic equipment Download PDFInfo
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- CN117639298A CN117639298A CN202310106980.2A CN202310106980A CN117639298A CN 117639298 A CN117639298 A CN 117639298A CN 202310106980 A CN202310106980 A CN 202310106980A CN 117639298 A CN117639298 A CN 117639298A
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- 238000004146 energy storage Methods 0.000 claims abstract description 75
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000006243 chemical reaction Methods 0.000 claims description 19
- 238000002955 isolation Methods 0.000 claims description 15
- 238000003491 array Methods 0.000 claims description 9
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 6
- 229910052744 lithium Inorganic materials 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000004064 recycling Methods 0.000 abstract description 4
- 230000006870 function Effects 0.000 description 15
- 238000004891 communication Methods 0.000 description 12
- 238000007726 management method Methods 0.000 description 9
- 230000005236 sound signal Effects 0.000 description 7
- 239000002699 waste material Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010295 mobile communication Methods 0.000 description 3
- 230000003190 augmentative effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
Classifications
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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
- H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
- H02J50/402—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-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
- 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
- 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
- H02J50/27—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves characterised by the type of receiving antennas, e.g. rectennas
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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
- H02J7/32—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from a charging set comprising a non-electric prime mover rotating at constant speed
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Transceivers (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
The embodiment of the application provides a radio frequency energy collector and electronic equipment, and the radio frequency energy collector is applied to electronic equipment, includes: the antenna matching circuit, the switch array and the rectifying circuit are arranged in the electronic equipment, wherein one end of the switch array is connected with a second antenna of the electronic equipment in an idle state through the antenna matching circuit in the process of radiating radio frequency energy by the first antenna of the electronic equipment, the other end of the switch array is connected with the rectifying circuit, and the rectifying circuit is connected with the energy storage device; the antenna matching circuit realizes impedance matching; after the second antenna receives the radio frequency energy radiated by the first antenna, the rectifying circuit converts the radio frequency energy received by the second antenna into electric energy and transmits the electric energy to the energy storage device. Based on the radio frequency energy collector, when a transmitting antenna in the electronic equipment transmits signals, other antennas of the electronic equipment receive radio frequency energy radiated by the transmitting antenna and convert the radio frequency energy into electric energy, and the electric energy is stored by an energy storage device, so that the recycling of the radio frequency energy is realized, and the power consumption is reduced.
Description
Technical Field
The application relates to the technical field of electronics, in particular to a radio frequency energy collector and electronic equipment.
Background
Along with the progress of the technological level, electronic devices such as mobile phones and computers are visible everywhere in our life, so that the living standard of users is greatly improved.
However, in the use process of electronic devices, a great deal of power consumption is often generated, and as the number of electronic devices owned by people increases, the power consumption is increasingly obvious. Therefore, there is a need for a method that can reduce the power consumption of electronic devices.
Disclosure of Invention
In order to solve the problem of higher power consumption of electronic equipment in the prior art, the embodiment of the application provides a radio frequency energy collector and the electronic equipment.
In a first aspect, an embodiment of the present application provides a radio frequency energy collector, applied to an electronic device, including:
an antenna matching circuit, a switch array and a rectifying circuit;
in the process that the first antenna of the electronic equipment radiates radio frequency energy, one end of the switch array is connected with the second antenna of the electronic equipment in an idle state through the antenna matching circuit, the other end of the switch array is connected with the rectifying circuit, and the rectifying circuit is connected with the energy storage device;
the antenna matching circuit is used for realizing impedance matching;
the rectification circuit is used for converting the radio frequency energy received by the second antenna into electric energy after the second antenna receives the radio frequency energy radiated by the first antenna, and transmitting the electric energy to the energy storage device.
Based on the radio frequency energy collector provided by the embodiment of the application, when the transmitting antenna in the electronic equipment transmits signals, other antennas in the electronic equipment receive radio frequency energy radiated by the transmitting antenna and convert the radio frequency energy into electric energy, and the energy storage device stores the electric energy, so that the recycling of the radio frequency energy is realized, and the power consumption of the electronic equipment is reduced.
In an alternative design, the method further comprises:
an electric energy conversion circuit disposed between the rectifying circuit and the energy storage device;
the electric energy conversion circuit is used for converting the electric energy output by the rectification circuit into electric energy suitable for the energy storage device.
Through the electric energy conversion circuit, the electric energy output by the rectification circuit can be converted into the level suitable for the energy storage device, so that the energy storage device can conveniently receive and store the electric energy, and the recovery rate of the radio frequency energy collector to radio frequency energy is improved.
In an alternative design, the antenna matching circuit includes circuitry disposed within the electronic device for achieving impedance matching.
Through the design, the antenna matching circuit in the radio frequency energy collector can multiplex a circuit for realizing impedance matching arranged in the electronic equipment, so that occupation of the radio frequency energy collector on a control of the electronic equipment is reduced, and the electronic equipment is light and thin.
In an alternative design, the energy storage device includes an energy storage device disposed within the electronic device;
or the energy storage device comprises an energy storage device externally connected with the electronic equipment.
If the energy storage device comprises an energy storage device arranged in the electronic equipment, the energy storage device of the electronic equipment can be charged through the radio frequency energy collector, and if the energy storage device comprises an external energy storage device of the electronic equipment, the external energy storage device can be charged through the radio frequency energy collector, so that the recycling of radio frequency energy is realized.
In an alternative design, the energy storage device includes a super capacitor and/or a lithium battery within the electronic device.
In an alternative design, the isolation of the first antenna and the second antenna is within a first range.
In an alternative design, the first range is 10db to 25db.
In an alternative design, the second antenna includes at least one antenna;
when the second antenna includes a plurality of switch arrays, different switch arrays are respectively connected with different second antennas.
In an alternative design, the method further comprises:
a trigger;
the trigger is used for triggering the switch array to communicate the second antenna with the rectifying circuit under the condition that the first antenna radiates radio frequency energy.
In a second aspect, embodiments of the present application provide an electronic device, which includes the radio frequency energy collector of the first aspect.
The embodiment of the application provides a radio frequency energy collector and electronic equipment, wherein the radio frequency energy collector is applied to the electronic equipment, and the electronic equipment comprises a first antenna and a second antenna. The first antenna can receive the radio frequency energy radiated by the first antenna in the process of radiating the radio frequency energy, the radio frequency energy received by the second antenna is converted into corresponding electric energy through the radio frequency energy collector, and the electric energy is stored by the energy storage device, so that the radio frequency energy is recycled, and the power consumption of the electronic equipment is reduced.
Drawings
Fig. 1 is a schematic structural diagram of an audio device according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of a radio frequency energy collector according to an embodiment of the present disclosure;
FIG. 3 is a schematic structural view of yet another RF energy collector disclosed in an embodiment of the present application;
fig. 4 is a schematic structural diagram of yet another rf energy collector disclosed in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include, for example, "one or more" such forms of expression, unless the context clearly indicates to the contrary. It should also be understood that in the various embodiments herein below, "at least one", "one or more" means one, two or more than two. The term "and/or" is used to describe an association relationship of associated objects, meaning that there may be three relationships; for example, a and/or B may represent: a alone, a and B together, and B alone, wherein A, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship.
Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.
For clarity and conciseness in the description of the following embodiments, a brief description of the related art will be given first:
electronic devices typically require the transmission or reception of signals during use. To meet this demand for electronic devices, a plurality of antennas are generally provided within the electronic devices.
In the present design, a plurality of different antennas are respectively arranged at different positions of the mobile phone, and the different antennas can be respectively used for receiving or transmitting different signals so as to meet the use requirements of users. And, when part of the antennas of the electronic device are in an operating state (i.e., a transmitting or receiving signal state), other antennas may be in an idle state (i.e., a state where no signal is transmitted and no signal is received).
The antenna for transmitting signals may be referred to as a transmitting antenna, and the antenna for receiving signals may be referred to as a receiving antenna. When transmitting signals, the transmitting antenna radiates a large amount of radio frequency energy, which results in a large amount of power consumption of the electronic device.
In order to solve the problem of high power consumption of electronic equipment in the prior art, the application provides a radio frequency energy collector and the electronic equipment.
The electronic device in the embodiment of the present application may be referred to as a User Equipment (UE), a terminal (terminal), a terminal device, or the like. For example, the electronic device may be a tablet (portable android device, PAD), a personal digital assistant (personal digital assistant, PDA), a notebook, a handheld device with wireless communication function, a computing device, an in-vehicle device, a wearable device, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a mobile terminal with a display screen or a fixed terminal such as a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), or the like. The form of the electronic device in the embodiment of the present application is not particularly limited.
In the embodiment of the present application, the structure of the electronic device may be shown in fig. 1, where fig. 1 is a schematic structural diagram of an electronic device provided by applying the embodiment of the present application.
As shown in fig. 1, the electronic device may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (universal serial bus, USB) interface 130, a charge management module 140, a power management module 141, a battery 142, a sensor module 180, keys 190, a motor 191, an indicator 192, a camera 193, a display 194, and the like. The sensor module 180 may include a pressure sensor 180A, a gyro sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, a bone conduction sensor 180M, and the like.
Further, when the electronic device has a function of transmitting and receiving a signal (for example, the electronic device is a mobile phone), the electronic device may further include: antenna 1, antenna 2, mobile communication module 150, wireless communication module 160, audio module 170, speaker 170A, receiver 170B, microphone 170C, earphone interface 170D, and subscriber identity module (subscriber identification module, SIM) card interface 195, etc.
It is to be understood that the configuration illustrated in this embodiment does not constitute a specific limitation on the electronic apparatus. In other embodiments, the electronic device may include more or fewer components than shown, or certain components may be combined, or certain components may be split, or different arrangements of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.
The processor 110 may include one or more processing units, wherein different processing units may be separate devices or may be integrated in one or more processors. A memory may also be provided in the processor 110 for storing instructions and data.
In some embodiments, the processor 110 may include one or more interfaces. The interfaces may include an integrated circuit (inter-integrated circuit, I2C) interface, an integrated circuit built-in audio (inter-integrated circuit sound, I2S) interface, a pulse code modulation (pulse code modulation, PCM) interface, a universal asynchronous receiver transmitter (universal asynchronous receiver/transmitter, UART) interface, a mobile industry processor interface (mobile industryprocessor interface, MIPI), a general-purpose input/output (GPIO) interface, a subscriber identity module (subscriber identity module, SIM) interface, and/or a universal serial bus (universal serial bus, USB) interface, among others.
The charge management module 140 is configured to receive a charge input from a charger. The power management module 141 is used for connecting the battery 142, and the charge management module 140 and the processor 110. The power management module 141 receives input from the battery 142 and/or the charge management module 140 to power the processor 110, the internal memory 121, the display 194, the camera 193, the wireless communication module 160, and the like.
The mobile communication module 150 may provide a solution for wireless communication including 2G/3G/4G/5G, etc. applied on an electronic device. The wireless communication module 160 may provide solutions for wireless communication including wireless local area network (wireless local area networks, WLAN) (e.g., wireless fidelity (wireless fidelity, wi-Fi) network), bluetooth (BT), global navigation satellite system (global navigation satellite system, GNSS), frequency modulation (frequency modulation, FM), near field wireless communication technology (near field communication, NFC), infrared technology (IR), etc. for application on an electronic device. In some embodiments, the antenna 1 and the mobile communication module 150 of the electronic device are coupled, and the antenna 2 and the wireless communication module 160 are coupled, so that the electronic device can communicate with the network and other devices through wireless communication technology.
The electronic device implements display functions through a graphics processor (graphics processing unit, GPU), a display screen 194, and an application processor, among others. The GPU is a microprocessor for image processing, and is connected to the display 194 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. Processor 110 may include one or more GPUs that execute program instructions to generate or change display information.
The display screen 194 is used to display images, videos, and the like. The display 194 includes a display panel. A series of graphical user interfaces (graphical user interface, GUIs) may be displayed on the display 194 of the electronic device, all of which are home screens of the electronic device.
The electronic device may implement shooting functions through an ISP, a camera 193, a video codec, a GPU, a display screen 194, an application processor, and the like.
The external memory interface 120 may be used to connect an external memory card, such as a Micro SD card, to enable expansion of the memory capabilities of the electronic device. The external memory card communicates with the processor 110 through an external memory interface 120 to implement data storage functions. The internal memory 121 may be used to store computer executable program code including instructions. The processor 110 executes various functional applications of the electronic device and data processing by executing instructions stored in the internal memory 121.
The electronic device may implement audio functions through an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, an application processor, and the like. Such as music playing, recording, etc.
The audio module 170 is used to convert digital audio information into an analog audio signal output and also to convert an analog audio input into a digital audio signal. The audio module 170 may also be used to encode and decode audio signals. In some embodiments, the audio module 170 may be disposed in the processor 110, or a portion of the functional modules of the audio module 170 may be disposed in the processor 110.
The speaker 170A, also referred to as a "horn," is used to convert audio electrical signals into sound signals. The electronic device may listen to music, or to hands-free conversations, through speaker 170A. A receiver 170B, also referred to as a "earpiece", is used to convert the audio electrical signal into a sound signal. Microphone 170C, also referred to as a "microphone" or "microphone", is used to convert sound signals into electrical signals. When making a call or transmitting voice information, the user can sound near the microphone 170C through the mouth, inputting a sound signal to the microphone 170C. The earphone interface 170D is used to connect a wired earphone.
The pressure sensor 180A is used to sense a pressure signal, and may convert the pressure signal into an electrical signal. In some embodiments, the pressure sensor 180A may be disposed on the display screen 194. The pressure sensor 180A is of various types, such as a resistive pressure sensor, an inductive pressure sensor, a capacitive pressure sensor, and the like. The gyro sensor 180B may be used to determine a motion gesture of the electronic device. The air pressure sensor 180C is used to measure air pressure. The magnetic sensor 180D includes a hall sensor. The electronic device may detect the opening and closing of the flip holster using the magnetic sensor 180D. The acceleration sensor 180E may detect the magnitude of acceleration of the electronic device in various directions (typically three axes). A distance sensor 180F for measuring a distance. The proximity light sensor 180G may include a Light Emitting Diode (LED) and a light detector. The ambient light sensor 180L is used to sense ambient light level. The fingerprint sensor 180H is used to collect a fingerprint. The temperature sensor 180J is for detecting temperature. The touch sensor 180K, also referred to as a "touch device". The touch sensor 180K may be disposed on the display screen 194, and the touch sensor 180K and the display screen 194 form a touch screen, which is also called a "touch screen". The bone conduction sensor 180M may acquire a vibration signal. The keys 190 include a power-on key, a volume key, etc. The keys 190 may be mechanical keys, touch keys, or virtual keys. The motor 191 may generate a vibration cue. The indicator 192 may be an indicator light, may be used to indicate a state of charge, a change in charge, a message indicating a missed call, a notification, etc. The SIM card interface 195 is used to connect a SIM card.
In addition, an operating system is run on the components. Such as the iOS operating system developed by apple corporation, the Android open source operating system developed by google corporation, the Windows operating system developed by microsoft corporation, etc. An operating application may be installed on the operating system.
In order to clarify the solutions provided in the present application, the following description will describe the solutions provided in the present application by referring to the drawings in the following embodiments.
The present embodiments provide a radio frequency energy collector applicable to an electronic device including a first antenna 100 and a second antenna 200. Referring to the schematic structure shown in fig. 2, the radio frequency energy collector comprises: an antenna matching circuit 300, a switch array 400, and a rectifying circuit 500.
During the process of radiating radio frequency energy by the first antenna 100 of the electronic device, one end of the switch array 400 is connected with the second antenna 200 of the electronic device in an idle state through the antenna matching circuit 300, and the other end of the switch array 400 is connected with the rectifying circuit 500, and the rectifying circuit 500 is connected with the energy storage device.
Wherein typically the first antenna 100 radiates a significant amount of Radio Frequency (RF) energy during the time that the first antenna 100 is transmitting signals. In addition, the second antenna 200 is an antenna of the electronic device, and the second antenna 200 is an antenna in an idle state when the first antenna 100 radiates radio frequency energy. The second antenna 200 being in an idle state refers to the second antenna 200 being in an inactive state, i.e. the second antenna 200 is not transmitting signals and is not receiving signals. Since the second antenna 200 does not transmit and does not receive signals, the second antenna 200 may receive radio frequency energy radiated from the first antenna 100.
Since one end of the switch array 400 is connected to the second antenna 200 through the antenna matching circuit 300 and the other end of the switch array 400 is connected to the rectifying circuit 500 and the rectifying circuit 500 is connected to the energy storage device during the process of radiating the radio frequency energy by the first antenna 100 in the electronic device, the second antenna 200, the antenna matching circuit 300, the switch array 400, the rectifying circuit 500 and the energy storage device form a path.
In the rf energy collector provided in the embodiments of the present application, the switch array 400 functions as a switching path. When the second antenna 200 can receive the radio frequency energy radiated by other antennas, the switch array 400 is switched to realize the communication between the second antenna 200 and the rectifying circuit. In addition, the switch array 400 may be switched to other paths when the second antenna 200 is not required to receive rf energy.
Illustratively, in the schematic structure shown in fig. 2, the switch array 400 includes N ports, RF1, RF2 to RF N, respectively, for connecting different paths, wherein the switch array 400 is in communication with the rectifying circuit when the switch array 400 is switched to the RF1 port. In this example, the switch array 400 may be switched to connect to the RF1 port when the second antenna 200 is required to receive RF energy radiated by another antenna, in which case a path is formed between the second antenna 200, the antenna matching circuit 300, the switch array 400, and the rectifying circuit 500. If the second antenna 200 is not required to receive radio frequency energy radiated by other antennas, the switch array 400 may be switched to the RF2 port or other ports depending on the function the second antenna 200 is required to perform so that the second antenna 200 communicates with other circuit elements.
Wherein the antenna matching circuit 300 is used to achieve impedance matching. Specifically, the antenna matching circuit 300 is configured to implement impedance matching of the path in which the second antenna 200 is located, so as to improve the rf energy collected by the rf energy collector.
In one possible design of the embodiment of the present application, the antenna matching circuit 300 may include the first circuit, that is, the antenna matching circuit 300 may multiplex a circuit having an impedance matching function in the electronic device, so as to reduce the space occupation of the radio frequency energy collector electronic device, and facilitate the realization of the light and thin electronic device.
The rectifying circuit 500 is configured to convert the radio frequency energy received by the second antenna 200 into electrical energy after the second antenna 200 receives the radio frequency energy radiated by the first antenna 100, and transmit the electrical energy to the energy storage device. The energy storage device can store the received electric energy, and waste of the electric energy is avoided.
If the electronic device is provided with the second circuit capable of converting rf energy into electric energy, in a feasible design of the embodiment of the present application, the rectifying circuit 500 may be the second circuit, that is, the rectifying circuit 500 may reuse a circuit having a function of converting rf energy into electric energy in the electronic device, thereby reducing space occupation of the rf energy collector electronic device, and being beneficial to realizing light and thin electronic device.
In one possible design of the present application, the rectifier circuit converts radio frequency energy into direct current electrical energy, in which case the rectifier circuit may also be referred to as a radio frequency-direct current (radio frequency Direct Current, RF-DC) circuit.
In one possible design of the present application, the rectifying circuit 500 may be a chip having a function of converting radio frequency energy into electric energy, and the chip may be an EN2223 chip, a PCC110 chip, or the like, by way of example. Of course, the rectifying circuit 500 may be another chip with this function, which is not limited in the embodiment of the present application.
The embodiment of the application provides a radio frequency energy collector, the radio frequency energy collector is applied to electronic equipment, the electronic equipment includes first antenna and second antenna, the radio frequency energy collector includes antenna matching circuit, switch array and rectifier circuit, wherein, in the in-process that the first antenna of electronic equipment radiates radio frequency energy, one end of switch array is connected with the second antenna that is in idle state of electronic equipment through antenna matching circuit, and the other end of switch array is connected with rectifier circuit, rectifier circuit is connected with energy storage device, thereby make second antenna 200, antenna matching circuit 300, switch array 400, rectifier circuit 500 and energy storage device form a passageway. In this case, after the second antenna receives the radio frequency energy radiated by the first antenna, the antenna matching circuit may realize impedance matching of the path, and the second antenna may transmit the received radio frequency energy to the rectifying circuit, and then the rectifying circuit converts the radio frequency energy into electric energy, and transmits the electric energy to the energy storage device, so that the energy storage device stores the electric energy.
Based on the radio frequency energy collector provided by the embodiment of the application, when the transmitting antenna in the electronic equipment transmits signals, other antennas in the electronic equipment receive radio frequency energy radiated by the transmitting antenna and convert the radio frequency energy into electric energy, and the energy storage device stores the electric energy, so that the recycling of the radio frequency energy can be realized, and the power consumption of the electronic equipment is reduced.
Further, referring to the schematic structural diagram shown in fig. 3, in the radio frequency energy collector provided in another embodiment of the present application, the radio frequency energy collector further includes: the power conversion circuit 600. The power conversion circuit 600 is disposed between the rectifying circuit 500 and the energy storage device.
The power conversion circuit 600 is configured to convert the power output by the rectifying circuit 500 into power adapted to the energy storage device.
In some situations, after the rectifying circuit 500 converts the radio frequency energy received by the second antenna into electrical energy, the electrical energy has a higher or lower level, and the energy storage device cannot adapt to the electrical energy. In this case, the electric energy conversion circuit 600 may convert the electric energy output by the rectifying circuit 500 into a level adapted to the energy storage device, so that the energy storage device may receive and store the electric energy, thereby improving the recovery rate of the rf energy collector to the rf energy.
If the third circuit capable of converting the level is provided in the electronic device, in a feasible design of the embodiment of the present application, the electric energy conversion circuit 600 may be the third circuit provided in the electronic device, that is, the electric energy conversion circuit 600 may multiplex a circuit having a function of converting the level in the electronic device, thereby reducing the occupation of the space of the electronic device by the rf energy collector, and being beneficial to realizing the light and thin electronic device.
In one possible design provided by embodiments of the present application, the power conversion circuit may be a power management integrated circuit (power management ic, PMIC), which may be, for example, an AEM30940 chip or a PCC210 chip. Of course, the power conversion circuit may be other chips with a level conversion function, which is not limited in the embodiment of the present application.
Through the radio frequency energy collector provided by the embodiment of the application, radio frequency energy received by the second antenna can be converted into corresponding electric energy, and the electric energy is transmitted to the energy storage device. In the solution provided in the embodiments of the present application, the electrical energy stored in the energy storage device may be referred to as recovered electrical energy.
In one possible design, the energy storage device may be an energy storage device disposed within an electronic device. In order to realize the application of the electronic equipment, an energy storage device is usually arranged in the electronic equipment, and the energy storage device can provide corresponding electric energy for the electronic equipment. In this case, the energy storage device in the electronic device can provide the electric energy to the electronic device after storing the electric energy, so that the electronic device can utilize and recycle the electric energy, and the waste of power consumption is reduced.
In one possible example of such a design, the energy storage device may include a super-capacitor and/or lithium battery within the electronic device that may store recovered electrical energy and may be used by the electronic device.
Alternatively, in one possible design, the energy storage device comprises an energy storage device external to the electronic device. Under the condition, the radio frequency energy collector can be connected with an external energy storage device of the electronic equipment and used for storing and recovering electric energy, and under the condition, the external energy storage device can provide the recovered electric energy for other electronic equipment, so that the waste of power consumption is reduced.
In one possible example, the external energy storage device of the electronic device may be a mobile power source, where the mobile power source may store recovered electric energy, and provide the stored recovered electric energy for the electronic device when it is required to supply power to the electronic device.
When the first antenna of the electronic device transmits signals, the second antenna of the electronic device in an idle state (i.e. an inactive state) can receive the radio frequency energy radiated by the first antenna, and the radio frequency energy collector provided by the embodiment of the application converts the radio frequency energy into corresponding electric energy. In one possible design of the present application, the isolation of the first antenna and the second antenna is within a first range.
Isolation is used to characterize the ability of a radio frequency signal to leak to other ports, typically in decibels (dB). In general, the isolation of an antenna can be determined by the following formula:
isolation of antenna port MN = 10lg < PM/PN >. Where PM is the power transmitted by antenna port M and PN is the power leaked to antenna port N. In addition, the isolation of the antenna port MN may be the isolation between the antenna including the antenna port M and the antenna including the antenna port N.
That is, in the present application, the power transmitted from the antenna port of the first antenna and the power leaked to the antenna port of the second antenna may be determined, and the isolation degree of the first antenna and the second antenna may be determined based on the above formula.
If the isolation between the two antennas is large, the interference between the two antennas is small, but when one antenna transmits signals, the radio frequency energy received by the other antenna is small. In addition, if the isolation between the two antennas is small, the interference between the two antennas is large, but when one antenna transmits a signal, the radio frequency energy received by the other antenna is large. Therefore, in the scheme provided by the application, the isolation degree between the first antenna and the second antenna can be set in the first range, so that the first antenna is prevented from being greatly interfered in the process of transmitting signals, and the second antenna can be ensured to receive more radio frequency energy radiated by the first antenna.
In one possible example, the first range is 10dB to 25dB. That is, the isolation between the first antenna and the second antenna is not less than 10dB and not more than 25dB. Of course, the first range may also be other ranges according to the type of the electronic device and the actual use requirement, which is not limited in the embodiment of the present application.
An electronic device typically comprises a plurality of antennas, and when the transmitting antenna is transmitting signals, there may be one or more antennas in an idle state, in which case radio frequency energy radiated by the transmitting antenna may be received by the one or more antennas, and the corresponding second antenna may comprise at least one antenna.
When the second antenna includes a plurality of second antennas, the switch arrays in the rf energy collector provided in the embodiment of the present application generally include a plurality of second antennas, where different switch arrays are respectively connected to different second antennas, and when the second antennas receive rf energy radiated by the first antennas, the second antennas are respectively controlled to be communicated with the rectifying circuit.
In order to clarify the structure of the rf energy collector provided in the embodiments of the present application, fig. 4 is disclosed below. In the radio frequency energy collector corresponding to fig. 4, the radio frequency energy collector includes a plurality of second antennas 200 and a plurality of switch arrays 400, and different switch arrays 400 are respectively connected to different second antennas 200, and the antenna matching circuit 300 is located between the second antennas 200 and the switch arrays 400. In the case that the second antenna 200 needs to receive the rf energy radiated from the first antenna 100, the switch array 400 may communicate the antenna matching circuit 300 and the rectifying circuit 500, in which case, a path is formed between each of the second antenna 200, the antenna matching circuit 300, the switch array 400, the rectifying circuit 500, and the power conversion circuit 600, and each of the second antennas 200 is converted into corresponding power by the rf energy collector after receiving the rf energy radiated from the first antenna 100, and transmits the power to the energy storage device.
In this design, since the second antenna 200 includes a plurality of second antennas 200, the rf energy radiated by the first antenna 100 can be received by the plurality of second antennas 200, so that more rf energy can be recovered, and power consumption waste can be reduced.
In another embodiment of the present application, the radio frequency energy collector further includes a trigger, where the trigger may be configured to trigger the switch array to communicate the second antenna with the rectifying circuit in a case where the first antenna radiates radio frequency energy.
The trigger may be a chip having a function of triggering the switch array. Also, in one possible design, the trigger may be a trigger independent of the electronic device. Alternatively, in another possible design, the trigger may be a chip of the electronic device, in which case the trigger may reuse the chip of the electronic device, thereby reducing the space occupation of the rf energy collector electronic device, and facilitating the realization of a slim electronic device.
To clarify the advantages of the radio frequency energy collector provided herein, an example is disclosed below. In this example, the second antenna is a strip and the radio frequency energy collector may be as shown in fig. 3.
The isolation between the first antenna and the second antenna is 10dB, the first antenna emits 26dBm signals, and a path is formed between the second antenna and the antenna matching circuit, the switch array, the rectifying circuit and the electric energy conversion circuit. In this case, the second antenna receives the radio frequency energy radiated from the first antenna, and the radio frequency energy collector converts the radio frequency energy into electric energy and stores the electric energy into the energy storage device, and charges the energy storage device with the electric energy.
In this example, the rectification efficiency of the rectification circuit is 70%, and the antenna matching circuit, the switch array, the power conversion circuit, and the like cause losses, resulting in an energy efficiency of 50% of the recovered energy of the radio frequency energy collector. In this case, the power received by the energy storage device may be expressed by the following equation:
(26-10-3) dbm=13 dbm=20 mW. In this formula, dBm is decibel milliwatts (i.e., decibel relative to one milliwatt) and mW is milliwatts (i.e., milliwatt).
If the voltage of the energy storage device is 3V and the charging power is 3mAh, the energy storage device of the electronic equipment can be filled up through 27 minutes, so that the energy storage device can be charged based on the radio frequency energy radiated by the first antenna, the energy recovery is realized, and the waste of power consumption is reduced.
In this example, if the electronic device is a mobile phone, the energy storage device is a lithium battery or a standby battery of the mobile phone, when the first antenna in the mobile phone transmits signals, the second antenna receives radio frequency energy radiated by the first antenna, and the radio frequency energy collector converts the radio frequency energy into electric energy and charges the lithium battery or the standby battery in the mobile phone, so that the mobile phone can recycle the radio frequency energy radiated by the first antenna, and the number of times that the user charges the mobile phone is reduced.
In another example of the present application, the second antenna is four, and the rf energy collector may be as shown in fig. 4.
In this example, the four second antennas may simultaneously receive radio frequency energy radiated by the first antenna, and an average isolation between the four second antennas and the first antenna is 15dB, the first antenna emits a signal of 26dBm, and a path is formed between the second antenna and the antenna matching circuit, the switch array, the rectifying circuit, and the power conversion circuit. In this case, after the second antenna receives the radio frequency energy radiated from the first antenna, the radio frequency energy collector converts the radio frequency energy into electric energy, and stores the electric energy into the energy storage device, and the energy storage device is charged with the electric energy.
In this example, the rectification efficiency of the rectification circuit is 70%, and the antenna matching circuit, the switch array, the power conversion circuit, and the like cause losses, resulting in an energy efficiency of 50% of the recovered energy of the radio frequency energy collector. In this case, the power received by the energy storage device may be expressed by the following equation:
(26-15-3+6)dBm＝14dBm＝25mW。
if the voltage of the energy storage device is 3V and the charging power is 3mAh, the energy storage device can be filled up through 21 minutes, so that the energy storage device can be charged based on the radio frequency energy radiated by the first antenna, the energy recovery is realized, and the waste of power consumption is reduced.
Accordingly, in this example, the electronic device may also be a mobile phone, and the energy storage device may also be a lithium battery or a battery backup in the mobile phone, in which case, when the first antenna transmits a signal, the rf energy radiated by the first antenna may be received by the plurality of second antennas in the mobile phone, and the rf energy collector converts the rf energy into electric energy.
Through the above two examples, it can be seen that, by using the radio frequency energy collector provided by the embodiment of the present application, radio frequency energy radiated by the first antenna can be recovered, so as to reduce power consumption of the electronic device.
Accordingly, in another embodiment of the present application, an electronic device is provided that includes a radio frequency energy collector provided in each of the above embodiments of the present application (e.g., any of the embodiments corresponding to fig. 2-4).
Through the radio frequency energy collector provided by the embodiment of the application, when the antenna of the electronic equipment transmits signals, the radio frequency energy radiated by the antenna can be collected by the radio frequency energy collector and converted into corresponding electric energy, and the electric energy is stored by the energy storage device, so that the power consumption of the electronic equipment is reduced.
The same and similar parts of the embodiments of this specification are all mutually referred to, and each embodiment is mainly described in the differences from the other embodiments. In particular, for apparatus and system embodiments, the description is relatively simple, as it is substantially similar to method embodiments, with reference to the description of the method embodiments section.
The embodiments of the present invention described above do not limit the scope of the present invention.
Claims (10)
1. A radio frequency energy harvester for use in an electronic device, the radio frequency energy harvester comprising:
an antenna matching circuit, a switch array and a rectifying circuit;
in the process that the first antenna of the electronic equipment radiates radio frequency energy, one end of the switch array is connected with the second antenna of the electronic equipment in an idle state through the antenna matching circuit, the other end of the switch array is connected with the rectifying circuit, and the rectifying circuit is connected with the energy storage device;
the antenna matching circuit is used for realizing impedance matching;
the rectification circuit is used for converting the radio frequency energy received by the second antenna into electric energy after the second antenna receives the radio frequency energy radiated by the first antenna, and transmitting the electric energy to the energy storage device.
2. The radio frequency energy collector of claim 1, further comprising:
an electric energy conversion circuit disposed between the rectifying circuit and the energy storage device;
the electric energy conversion circuit is used for converting the electric energy output by the rectification circuit into electric energy suitable for the energy storage device.
3. The radio frequency energy collector of claim 1, wherein,
the antenna matching circuit comprises a circuit which is arranged in the electronic equipment and used for realizing impedance matching.
4. The radio frequency energy collector of claim 1, wherein,
the energy storage device comprises an energy storage device arranged in the electronic equipment;
or the energy storage device comprises an energy storage device externally connected with the electronic equipment.
5. The radio frequency energy collector of claim 4, wherein,
the energy storage device comprises a super capacitor and/or a lithium battery in the electronic equipment.
6. The radio frequency energy collector of any of claims 1-5, wherein,
the isolation of the first antenna and the second antenna is within a first range.
7. The radio frequency energy collector of claim 6, wherein,
the first range is 10db to 25db.
8. The radio frequency energy collector of any of claims 1-5, wherein,
the second antenna comprises at least one antenna;
when the second antenna includes a plurality of switch arrays, different switch arrays are respectively connected with different second antennas.
9. The radio frequency energy collector of any of claims 1-5, further comprising:
a trigger;
the trigger is used for triggering the switch array to communicate the second antenna with the rectifying circuit under the condition that the first antenna radiates radio frequency energy.
10. An electronic device, comprising:
the radiofrequency energy collector of any one of claims 1 to 9.
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| CN202310106980.2A CN117639298A (en) | 2022-09-01 | 2022-09-01 | Radio frequency energy collector and electronic equipment |
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| CN202211060028.5A CN115133673B (en) | 2022-09-01 | 2022-09-01 | Radio frequency energy collector and electronic equipment |
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| CN2535868Y (en) * | 2002-06-14 | 2003-02-12 | 王东升 | Wireless multifunctional electric energy meter |
| US8228194B2 (en) * | 2004-10-28 | 2012-07-24 | University Of Pittsburgh - Of The Commonwealth System Of Higher Education | Recharging apparatus |
| JP2017537585A (en) * | 2014-10-14 | 2017-12-14 | オハイオ ステート イノベーション ファウンデーション | System capable of automatically collecting energy from a wireless device and method of using the system |
| IL246003B (en) * | 2016-06-02 | 2019-03-31 | W P Energy Ltd | Multiband energy harvesting |
| FR3084978B1 (en) * | 2018-08-10 | 2020-07-17 | Uwinloc | RADIO FREQUENCY ENERGY COLLECTION CIRCUIT AND COMMUNICATION DEVICE INCLUDING SUCH A RADIO FREQUENCY COLLECTION CIRCUIT |
| CN109756035A (en) * | 2018-12-04 | 2019-05-14 | 中国科学院深圳先进技术研究院 | A kind of passive sensor, passive sensor system and working method |
| CN112448489A (en) * | 2019-08-30 | 2021-03-05 | Oppo广东移动通信有限公司 | Wireless charging receiving device, transmitting device, system and mobile terminal |
| CN112448727A (en) * | 2019-08-30 | 2021-03-05 | Oppo广东移动通信有限公司 | Electronic device and terminal device |
| CN111613889B (en) * | 2020-06-03 | 2022-03-29 | 河北工程大学 | Integrated radio frequency energy receiving device |
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