CN110635582A - Wireless energy transmission system and method for exciting and amplifying electromagnetic echo - Google Patents
Wireless energy transmission system and method for exciting and amplifying electromagnetic echo Download PDFInfo
- Publication number
- CN110635582A CN110635582A CN201910818272.5A CN201910818272A CN110635582A CN 110635582 A CN110635582 A CN 110635582A CN 201910818272 A CN201910818272 A CN 201910818272A CN 110635582 A CN110635582 A CN 110635582A
- Authority
- CN
- China
- Prior art keywords
- electromagnetic
- echo
- wireless energy
- energy transmission
- power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
-
- 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
-
- 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
- H02J50/60—Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
-
- 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
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
-
- 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
- H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
Abstract
The invention relates to a wireless energy transmission system and a method for exciting and amplifying electromagnetic echoes, wherein the system comprises a transmitting end and a receiving end which are used for forming an adaptive wireless energy transmission channel, and the wireless energy transmission channel restrains the energy of the electromagnetic echoes transmitted back and forth within a set transverse range. Compared with the prior art, the invention has the advantages of long-distance movement, human body safety guarantee, high-power transmission and the like.
Description
Technical Field
The invention relates to the field of wireless energy transmission, in particular to a wireless energy transmission system and a wireless energy transmission method for exciting and amplifying electromagnetic echoes.
Background
With the rapid development of mobile communication and computing technology, the traditional energy supply schemes such as wired rapid charging and energy collection cannot completely meet the new requirements of endurance and power supply of mobile equipment in the times of everything interconnection; therefore, the remote wireless energy transmission technology becomes an important energy supply scheme which needs to be developed at present.
The traditional remote wireless energy transmission technology has the problem that the high-power electromagnetic wave cannot ensure the safety of a human body in the remote transmission process, and can not simultaneously meet three major indexes of remote distance, high power and human body safety. The currently widely applied magnetic induction type Wireless charging technology mainly follows Qi standard established by Wireless Power Consortium (WPC), and the typical charging Power is 15W and the typical charging distance is 1cm under human body safety conditions; the magnetic resonance type wireless charging technology has less application, mainly follows the industry standard AirFuel Resonant established by the AirFuel alliance, has the typical charging power of 15W under the human body safety condition, has the typical charging distance of 5cm, and has higher production cost compared with the magnetic induction technology; the radio frequency and laser wireless charging technology can realize a charging distance of more than 5m, but is difficult to provide wireless mobile energy supply of more than 2W under the human body safety condition, such as a Cota technology, a Wattup technology, a Primove technology and a Wi-Charge technology which are not put into the market.
In earlier researches, electronic technology university and Nanjing aerospace university have related work of a wireless energy transmission system based on a single-direction retrospective antenna, but the research schemes do not adopt a bidirectional retrospective device, so that safe and controllable excitation amplification of wireless transmission power cannot be realized while mobile charging is carried out, and the safe charging power of a human body is low; the university of Qinghua discloses a laser resonant cavity coupling wireless energy transmission device based on a single corner reflector array, a light wave field is spatially restricted between a transmitting end and a receiving end so as to improve the energy transmission efficiency, but the device is only limited to realize energy transmission in a visual distance range, and a movable human body safety power supply design is not provided; ossia company discloses a method for operating a return wireless power transmission system, the method adopts a single-end direction backtracker and a virtual map technology to realize return wireless power transmission, but the design of the single-end direction backtracker leads to complex safety control logic; Wi-Charge corporation discloses a distributed resonator laser system using retro-reflective elements for wireless charging, which has a complex optical design, weak environmental contamination resistance, limited ability to transmit energy in the line-of-sight range, and difficulty in dissipating heat during high power density transmission.
Disclosure of Invention
The present invention is directed to a wireless energy transmission system and method for amplifying electromagnetic echo excitation, which overcomes the above-mentioned drawbacks of the prior art.
The purpose of the invention can be realized by the following technical scheme:
a wireless energy transmission system for exciting and amplifying electromagnetic echoes comprises a transmitting end and a receiving end which are used for forming an adaptive wireless energy transmission channel, and the wireless energy transmission channel restrains the energy of the electromagnetic echoes transmitted back and forth within a set transverse range.
The transmitting terminal include excitation source, power amplifier and first direction backtracking module the receiving terminal including the second direction backtracking module, energy coupling unit and the power matching unit that connect gradually, first direction backtracking module and second direction backtracking module be used for realizing the electromagnetic wave receive with reverse backtracking transmission, power amplifier carry out power amplification to the electromagnetic wave through first direction backtracking module to provide the energy by the excitation source, energy coupling unit with the electromagnetic wave coupling of second direction backtracking module become output current, the supply current of power matching unit output device load.
The transmitting terminal also comprises a first monitoring unit, a first main control unit and a first communication unit, the receiving terminal also comprises a second monitoring unit, a second main control unit and a second communication unit, the low-power-density radiation propagation area exists outside the energy transmission channel of the electromagnetic echo transmitted back and forth, the first monitoring unit is connected with the first direction backtracking module and used for detecting a physical state signal of the electromagnetic echo change caused by the fact that an external foreign object enters the low-power-density radiation propagation area in real time, detecting the foreign object and providing a safety detection signal for the first main control unit, the first main control unit is respectively connected with the first direction backtracking module, the first monitoring unit, the first communication unit and the excitation source and is in bidirectional communication with the second main control unit sequentially through the first communication unit and the second communication unit to realize coordination control, the second main control unit is respectively connected with the equipment load, the second monitoring unit and the second communication unit, and the second monitoring unit is respectively connected with the second direction backtracking module, the second main control unit and the power matching unit and used for extracting signals at the second direction backtracking module and the power matching unit, monitoring the signal characteristics of the receiving end in real time, detecting abnormal signals of the receiving end and providing safety detection signals for the second main control unit.
The first direction backtracking module include first echo receiver and first direction backtracking ware, the second direction backtracking module includes second echo receiver and second direction backtracking ware, first echo receiver, first direction backtracking ware, second echo receiver form the loop jointly or collinear wireless energy transmission passageway, specifically do:
the direction backtracking devices of the transmitting end and the receiving end convert small signal electromagnetic waves which are initially diverged and transmitted into loop or collinear round-trip transmission electromagnetic echoes, the power amplifier amplifies the power after the round-trip transmission electromagnetic echoes are incident on the first echo receiver every time, the round-trip transmission electromagnetic echoes are transmitted to the receiving end in a loop or collinear mode along the incident reverse direction by the first direction backtracking device, after the round-trip transmission electromagnetic echoes are incident on the second echo receiver every time, a part of energy is coupled and output by the energy coupling unit, the rest of energy is transmitted to the transmitting end in a loop or collinear mode along the incident reverse direction by the second direction backtracking device, and the energy coupled and output by the energy coupling unit is provided for equipment loads through the power matching unit, so that mobile power supply is realized.
The power amplifier amplifies the stimulated radiation of the electromagnetic wave or amplifies the power through a power amplifier device, and adopts a microwave stimulated radiation amplifier device, a power amplifier circuit or a stimulated radiation optical amplifier device.
The first direction backtracking device and the second direction backtracking device adopt active or passive devices, and specifically are direction backtracking array antennas, retro-reflectors or arrays. The direction backtracking array antenna is specifically a phase conjugate antenna, a self-steering array antenna and a VanAtta array antenna; the retro-reflector or the array is specifically an electromagnetic retro-reflector or an array, a cat-eye reflector or an array, or a pyramid prism reflector or an array.
The first echo receiver and the second echo receiver are electromagnetic echo receivers, in particular to a transceiving antenna of a direction backtracking array antenna or an electromagnetic echo anti-reflection optical element.
The wave band range of the electromagnetic waves in the self-adaptive wireless energy transmission channel is 780nm-1 m.
A method of wireless energy transfer, comprising the steps of:
1) a starting stage: when the receiving end is positioned in the working field range of the transmitting end and is ready to be charged, the transmitting end and the receiving end establish a communication link through the handshaking, authentication and authorization verification processes to prepare for establishing a wireless energy transmission channel;
2) an alignment stage: after a communication link is established, a transmitting end transmits a small electromagnetic wave signal which is divergently propagated, a receiving end receives the small electromagnetic wave signal through a second echo receiver and transmits a small electromagnetic signal echo to the transmitting end through a second direction backtracking device, the transmitting end receives the small electromagnetic signal and then utilizes a first monitoring unit to perform safety detection on a wireless energy transmission channel, if the judgment result is unsafe, the communication link is reestablished, otherwise, charging is started and kept, and alignment of the wireless energy transmission channel of the transmitting end and the receiving end is completed;
3) a charging stage: the method comprises two sub-stages of charge retention and channel detection, and specifically comprises the following steps:
after alignment of small signal electromagnetic echoes is completed, power amplification is completed through a transmitting end power amplifier, the small signal electromagnetic echoes are transmitted back to a receiving end through a first direction backtracker, a receiving end outputs and detects a part of energy in a coupling mode, the rest part of energy is transmitted back to the transmitting end through a second direction backtracker, after the electromagnetic echoes enter a first echo receiver, safety detection of a wireless energy transmission channel is completed through a first monitoring unit, whether charging is kept or not is judged, if the stable wireless energy transmission channel is kept and charging is carried out, the electromagnetic echoes are continuously excited and amplified through the power amplifier, otherwise, the current excitation and amplification process is interrupted, and a communication link is reestablished.
The system detects the invasion of foreign matters in real time through the first monitoring unit, changes the transmission path of the wireless energy transmission channel after detecting the invasion of the foreign matters, and specifically comprises the following steps:
the spatial transformation of the wireless energy transmission channel is completed through a reflector or the relay transmission of the wireless energy is realized through a repeater, and the repeater is an active or passive reflector or antenna.
Compared with the prior art, the invention has the following advantages:
firstly, the remote mobile: the two receiving and transmitting ends of the system provided by the invention are designed by adopting the direction tracers, which means that electromagnetic waves form electromagnetic echoes which can be self-adaptively aligned and can be transmitted back and forth between the direction tracers at the two ends, so that a wireless energy self-adaptive transmission channel is formed, and the long-distance movable wireless charging is ensured. The design of the direction backtracers at the two ends can improve the dynamic alignment performance of the receiving end and the transmitting end in the process of the back-and-forth transmission of the electromagnetic echo; the working wavelength range of the electromagnetic echo is 780nm-1m, and the method is suitable for two different requirements of line-of-sight transmission with high space transmission efficiency and non-line-of-sight transmission with good anti-interference mobile charging performance.
Secondly, the human body is safe and high in power: the design of the two-end direction backtracking device and the design of echo controllable excitation amplification ensure high-power wireless charging of human body safety from two aspects of space isolation and time control. The design of the backtracking devices at two ends and the design of 780nm-1m wavelength ensure that the electromagnetic echo energy transmitted back and forth is constrained in a certain transverse space range of the wireless energy transmission channel, which is favorable for realizing the space isolation of the electromagnetic echo transmission channel and external foreign matters; the echo controllable excitation amplification design ensures that the time for stably establishing the wireless energy transmission channel is always longer than the time for contacting a foreign matter with the electromagnetic echo wireless energy transmission channel, and is beneficial to realizing the isolation of the high-power density part of the electromagnetic echo and the external foreign matter on the contact time; the electromagnetic echo and external foreign matter dynamic interactive response detection mechanism based on the physical mechanism ensures the real-time detection of the condition that foreign matters invade the wireless energy transmission channel, and is beneficial to realizing the rapid space transformation or interruption of the wireless energy transmission channel.
Drawings
Fig. 1 is a general block diagram of a wireless energy transmission system with electromagnetic echo excitation amplification.
Fig. 2 is a diagram of a controllable excitation amplifier for electromagnetic echoes.
Fig. 3 is a safety mechanism diagram of the electromagnetic echo excitation amplification wireless energy transmission system, wherein fig. 3a is a safety mechanism diagram of spatial isolation, and fig. 3b is a safety mechanism diagram of time control.
Fig. 4 is a flow chart of the operation of the electromagnetic echo excitation amplification wireless energy transmission system.
Fig. 5 is a diagram of a channel space transformation and relay transmission mechanism of the electromagnetic echo excitation amplification wireless energy transmission system.
Fig. 6 is a structural diagram of an electromagnetic echo wireless energy transmission system based on microwave stimulated radiation amplification.
Fig. 7 is a structural diagram of a direction backtracker design based on a phase conjugate antenna.
Fig. 8 is a schematic structural diagram of a phase conjugate antenna.
Fig. 9 is a block diagram of a phase conjugate antenna implemented based on a mixer.
Fig. 10 is a diagram of a power matching unit design.
Fig. 11 is a block diagram of an electromagnetic echo wireless energy transmission system based on a power amplification circuit.
Fig. 12 is a block diagram of a phase conjugate antenna in which a power amplifier circuit is connected to a mixer.
Fig. 13 is a block diagram of an electromagnetic echo wireless energy transfer system based on stimulated emission light amplification.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
As shown in fig. 1, the present invention provides a wireless energy transmission system with electromagnetic echo excitation amplification, which has the following system structure:
the system comprises a transmitting end 1 and a receiving end 2 for wireless energy transfer. The wireless energy transmission transmitting terminal 1 comprises a power amplifier 3, a first echo receiver 4, a first direction backtracking device 5, a first monitoring unit 6, a first main control unit 7, an excitation source 8 and a first communication unit 9, and the receiving terminal 2 comprises a second direction backtracking device 10, a second echo receiver 11, an energy coupling unit 12, a power matching unit 13, a device load 14, a second main control unit 15, a second monitoring unit 16 and a second communication unit 17.
The direction backtracking devices of the transmitting end 1 and the receiving end 2 are used for converting the divergently propagated small signal electromagnetic waves into loop or collinear round-trip transmitted self-adaptive alignment electromagnetic echoes;
the power amplifier 3 is used for successively exciting and amplifying the electromagnetic echo transmitted back and forth under the constraint of a safety detection signal, the safety detection signal is provided by the electromagnetic echo transmitted back and forth and is used for controlling the power amplifier, and the method adopted in the embodiment is to detect a dynamic interaction response signal of the electromagnetic echo and an external foreign object;
the working wavelength range of the electromagnetic echo is 780nm-1m, high space transmission efficiency can be ensured by adopting a line-of-sight transmission mode under the wavelength of 780nm-1mm, and anti-interference high-freedom mobile charging is ensured by adopting a non-line-of-sight transmission mode under the wavelength of 1mm-1 m;
in addition, the electromagnetic echo with the working wavelength of 780nm-1m can also avoid photochemical and photoionization damages caused by the electromagnetic echo with the wavelength less than 780nm, and simultaneously avoid overlarge cross section of the energy transmission channel dangerous area of the electromagnetic echo with the wavelength more than 1 m;
the power amplifier 3 may adopt a power amplifying circuit, and may also be a stimulated radiation amplifying unit (such as a microwave stimulated radiation amplifying module, a terahertz stimulated radiation amplifying module, a stimulated radiation light amplifying module) for exciting and amplifying an electromagnetic echo;
the direction backtracking device can adopt active or passive devices in the example, such as a direction backtracking array antenna, an electromagnetic wave retro-reflector, a cat eye reflector, a pyramid prism reflector and other design structures, and can also adopt a phase conjugate antenna, a self-steering array antenna, a VanAtta array antenna, a cat eye reflector array, a pyramid prism reflector array and the like to provide electromagnetic echoes with the propagation direction opposite to the incident direction;
the echo receiver adopts a receiving antenna or an electromagnetic echo increasing and transmitting type optical element and is used for coupling and receiving electromagnetic echoes, and the typical receiving antenna is a receiving and transmitting antenna of a direction backtracking array;
the main control unit is used for providing processing functions of safety detection signals, handshake authentication of the receiving and transmitting ends, feedback control communication and the like.
The energy transmission of the system is realized as follows:
the wireless energy transmission system for exciting and amplifying the electromagnetic echo consists of a transmitting end 1 and a receiving end 2, wherein the transmitting end 1 comprises at least one first direction backtracking device 5 and a first echo receiver 4, and the receiving end 2 comprises at least one second direction backtracking device 10 and a second echo receiver 11, so that the electromagnetic echo capable of being self-adaptively aligned and transmitting back and forth is provided, and a long-distance movable wireless energy transmission channel is formed. The direction backtracking devices at the receiving and transmitting ends convert the small signal electromagnetic waves which are initially diverged and transmitted into loop or collinear round-trip transmission self-adaptive alignment electromagnetic echoes 18; after electromagnetic echoes 18 transmitted back and forth enter the first echo receiver 4 at the transmitting end each time, the power is amplified by the power amplifier 3, and then the electromagnetic echoes are transmitted to the receiving end by the first direction retroverter 5 in a loop or collinear way along the incident direction; after the electromagnetic echo 18 transmitted back and forth enters the second echo receiver 11 at the receiving end each time, a part of energy is coupled and output by the energy coupling unit 12, and a part of energy is transmitted to the transmitting end by the second direction retroverter 10 at the receiving end in a loop or collinear manner along the incident direction; the energy coupled out by the energy coupling unit 12 is provided to the equipment load 14 via the power matching unit 13, so as to realize mobile power supply.
The controllable excitation of the system is implemented as follows:
as shown in fig. 2, the controllable excitation amplification of the electromagnetic echo 18 includes two stages, small signal excitation amplification and saturated power excitation amplification. The rising time t of the small signal excitation amplification stage is determined and controlled by 'the shortest possible time for the external foreign matter to move from the safe distance to the wireless energy transmission channel'; the saturated power excitation amplification stage, namely the maintenance stage of the stable operation of the wireless energy transmission channel, is controlled in real time by a safety detection signal, once an external foreign object is detected, the current transmission channel is interrupted in the shortest time tau, and the controllable excitation amplification process of the electromagnetic echo is reestablished through the spatial transformation of the channel.
The transmitting end 1 of the wireless energy transmission system successively excites and amplifies electromagnetic echoes 18 transmitted back and forth under the constraint of a safety detection signal by utilizing a power amplifier 3, a first echo receiver 4, a first direction backtracking device 5, a first main control unit 7 and an excitation source 8. The electromagnetic echo 18 enters the power amplifier 3 after entering the first echo receiver 4, obtains power amplification under the constraint of a safety detection signal, and then enters the first direction backtracking device 5 to form a transmission electromagnetic echo 18; the safety detection signal is sensed and captured by the first monitoring unit 6 and the second monitoring unit 16, and is processed by the first main control unit 7 and the second main control unit 15 to generate a control instruction; the control instructions provided by the first main control units 7 and 15 form cooperative control with the second communication unit 17 through the first communication unit 9; the control instruction realizes controllable excitation amplification operations such as maintaining, interrupting, restarting and transmission channel changing of the electromagnetic echo by controlling the excitation source 8 and the first direction backtracking device 5; the first main control unit 7 also provides a control instruction to control the output power of the excitation source 8 through a preset algorithm, so as to realize single amplification factor control of the power amplifier 3, and thus realize successive excitation amplification of the electromagnetic echo 18 transmitted back and forth.
The security mechanism and detection of the system are realized as follows:
as shown in fig. 3, the safety mechanism of the wireless energy transmission system with electromagnetic echo excitation amplification includes two aspects of spatial isolation and time control. In the aspect of spatial isolation, as shown in fig. 3a, by means of the design of the direction backtrackers at the transmitting and receiving ends and the design of the working wavelength of 780nm-1m, the electromagnetic echo energy transmitted back and forth is guaranteed to be constrained within a certain transverse range of the wireless energy transmission channel, so that the spatial isolation between the electromagnetic echo transmission channel and an external foreign object is realized; in the aspect of time control, as shown in fig. 3b, the time for the external foreign object to contact the electromagnetic echo energy transmission channel is longer than the shortest time t determined by the safety distance d and the limit speed v, and then the interruption time τ of the wireless energy transmission channel in stable operation is shorter than the shortest time t, so that the time isolation between the electromagnetic echo transmission channel and the external foreign object is realized.
The transmitting terminal 1 of the wireless energy transmission system utilizes the first monitoring unit 6 to monitor the interactive response signal of the electromagnetic echo 18 and the external foreign object in the safety response area in real time. The electromagnetic echo 18 is a radiation propagation area outside the energy transmission channel, the radiation power density of the electromagnetic echo in the area is low, and the physical state of the electromagnetic echo can be changed in real time after external foreign matters enter the area, so that the electromagnetic echo is sensed and captured by the first monitoring unit 6; the first monitoring unit 6 can extract signals at the positions of the first echo receiver 4, the first direction backtracking module and the like, and detect various characteristic signals including spatial intensity, temporal intensity, frequency domain phase and the like.
The first monitoring unit 6 can capture the state of external foreign matters by means of sensing sources such as auxiliary acoustoelectric and photoelectric sources and the like, so that foreign matter detection is realized. The second monitoring unit 16 can extract signals at the power matching unit 13 and the second direction backtracking module, and the like, monitor various characteristics of the electric signals of the receiving end in real time, and provide auxiliary safety detection signals.
The system work flow and the main control unit of the system have the following working principle:
as shown in fig. 4, the work flow of the wireless energy transmission system with electromagnetic echo excitation amplification includes three stages of starting, aligning, and charging. And in the starting stage, after the receiving end 2 is ready to be charged in the working view field range of the transmitting end 1, the transmitting end 1 and the receiving end 2 of the wireless energy transmission system establish a communication link through the verification processes of handshaking, authentication, authorization and the like, so that the wireless energy transmission system is ready for the generation and alignment of the small electromagnetic wave signals in the next stage. In the alignment stage, after communication links at the transmitting end and the receiving end are established, the transmitting end 1 transmits a divergently propagated electromagnetic wave small signal, the receiving end 2 receives the small signal through the second echo receiver 11, and transmits a small signal electromagnetic echo 18 to the transmitting end 1 through the second direction backtracker 10; after receiving the small signal electromagnetic return, the transmitting terminal 1 utilizes the first monitoring unit 6 to perform safety detection on the wireless energy transmission channel, if the judgment result is unsafe, the communication link is reestablished, otherwise, the charging is started and kept, and the alignment of the wireless energy transmission channels at the transmitting end and the receiving end is completed. The charging phase comprises two parts of charging maintenance and channel detection: after the alignment of the small signal electromagnetic echo is finished, the power amplification is finished through the power amplifier 3, and then the small signal electromagnetic echo is transmitted back to the receiving end 2 through the first direction backtracking device 5; the receiving end 2 couples and outputs a part of energy and detects the energy, and transmits the other part of energy to the transmitting end 1 through the second direction backtracking device 10; after the electromagnetic echo 18 enters the first echo receiver 4 of the transmitting terminal 1, the channel detection is completed through the first monitoring unit 6, and whether the charging is kept or not is judged; if the charging is continued, the power amplifier 3 is used to continue the excitation amplification of the electromagnetic echo 18, otherwise the current excitation amplification process is interrupted and the communication link is reestablished.
The first main control unit 7 and the second main control unit 15 realize the control processing and calculation functions of handshake, authentication, authorization, detection, interruption, controllable excitation amplification and the like. The first main control unit 7 ensures controllable excitation amplification of the electromagnetic echo 18 from the aspects of foreign matter detection, abnormal detection and single amplification factor.
The transmission channel space transformation and relay transmission mode of the system is as follows:
as shown in fig. 5, the wireless energy transmission system excited and amplified by electromagnetic echo can detect foreign matters in real time through the first monitoring unit 6 under the working wavelength of 1mm-1 m; after the intrusion of the foreign matters is detected, the first direction backtracking module and the second direction backtracking module are controlled by the main control unit 7 by means of reflectors, so that the space transformation of the wireless energy transmission channel is completed. The wireless energy transmission system with the excitation and amplification of the electromagnetic echo can also realize the relay transmission of the wireless energy by the repeater 19 at the working wavelength of 780nm-1 m. The repeater 19 may be an active or passive reflector or antenna.
Example 1
The embodiment provides an electromagnetic echo wireless energy transmission system based on microwave stimulated radiation amplification, which comprises the following specific contents:
amplification: as shown in fig. 6, in an electromagnetic echo wireless energy transmission system using a microwave stimulated radiation amplification device, a power amplifier 3 at an emission end 1 can be implemented by using the microwave stimulated radiation amplification device, which includes four components, namely a pumping module 20, a microwave stimulated radiation amplification module 21, a coupling circuit 22, and a microwave resonant cavity 23, and the electromagnetic echo 18 is stimulated and amplified by using a stimulated radiation principle. The microwave stimulated radiation amplification module 21 is Cu2O crystal, microwave resonant cavity 23 is quality factor Q ≈ 105The pump module 20 is an optical pump module, and the coupling circuit 22 ensures the coupling input/output of electromagnetic waves.
Alignment: the first direction backtracking device 5 and the second direction backtracking device 10 are direction backtracking array antennas, the first echo receiver 4 and the second echo receiver 11 are receiving and transmitting antennas of the direction backtracking array antennas, and the direction backtracking device and the echo receiver are in a coupling design. As shown in fig. 7, the first direction tracers 5 and 10 may alternatively be constituted by phase conjugate antennas and oscillation generators. The phase conjugation refers to when the phase of the received electromagnetic wave is
The phase of the emitted phase conjugate electromagnetic wave (electromagnetic echo) is
k is any integer; the phase conjugate antenna also requires an oscillator generator to provide a local oscillator signal, which is an electromagnetic wave of a fixed frequency.
The implementation of a phase conjugate antenna involves a variety of structures, one generalized structure including a transceiving antenna, a phase shifter, a shunt node, and a filter is illustrated in fig. 8. The phase shifter shifts the signal received by the transmitting and receiving antenna by a fixed phase, selects a signal with a specified frequency component through the filter, and transmits the signal in the form of electromagnetic echo by the transmitting and receiving antenna. The shunt node is connected to the coupling circuit 22 or the energy coupling unit 12, and performs a power amplification function at the transmitting end and an energy output function at the receiving end. The transceiving antenna is generally a microstrip double-fed dual-polarized antenna, has the function of simultaneously receiving and transmitting electromagnetic echoes, and can be used as the first echo receiver 4 and 11. In the above process, the received electromagnetic echo signal is transmitted through the line and is subjected to phase delay under the actions of the filter, the amplifier and other devices. Therefore, when a plurality of phase conjugate antennas form an array, the delay amounts generated by the non-phase shifters should be kept consistent through a preset algorithm in the first main control unit 7; or the phase shifter is designed as a phase-adjustable device, and the phase conjugation accuracy of the electromagnetic echo is met by adjusting the adjustable phase shifter in the phase conjugation antenna.
Fig. 9 illustrates a phase conjugate antenna based on a mixer implementation. The electromagnetic echo signals received by the receiving and transmitting antenna are mixed with the local oscillator signals, and the frequency of the local oscillator signals is twice of that of the electromagnetic echo signals received by the receiving and transmitting antenna. The mixer outputs two input signals after multiplication operation: when the input signal of the mixer is
The local oscillator signal is cos2 omegast, then the mixing signal is
It can be seen that the mixed signal contains components that are the same frequency as the input signal and have opposite phases. The signal output by the mixer is filtered again, and only the component with the same frequency as the signal received by the transmitting-receiving antenna is reserved.
Based on the above design, the direction backtracker and the echo receiver couple the electromagnetic echo 18 into the power amplifier 3 through the coupling circuit 22, and then reversely transmit to the receiving end 2, thereby realizing the self-adaptive alignment of the electromagnetic echo at the transmitting and receiving ends.
And (3) detection: the first monitoring unit 6 mainly extracts an interaction response signal of the electromagnetic echo 18 and an external foreign object from the first direction backtracking module, such as various characteristic signals of space intensity, time intensity, frequency domain phase and the like, and informs the first main control unit 7 to process the signal, so that the foreign object detection of the transmission channel is realized. The second monitoring unit 16 extracts the detection signal from the power matching unit 13 or the second direction backtracking module, and notifies the second main control unit 15 of processing, so as to implement anomaly detection, and if an anomaly occurs, notifies the first main control unit 7 of cooperative processing.
Controlling: the first main control unit 7 controls the first monitoring unit 6, the first direction backtracking module, the excitation source 8 and the first communication unit 9, and ensures controllable excitation amplification of the electromagnetic echo 18 from the aspects of foreign matter detection, anomaly detection and single amplification factor. The first main control unit 7 controls the excitation source 8 in real time through foreign matter detection and abnormality detection to realize control of the power amplifier 3 such as keeping, interrupting and restarting; the first main control unit 7 also comprises a preset control algorithm for controlling the output power of the excitation source 8, so as to realize the single amplification factor control of the power amplifier 3.
And (3) the other: the first communication units 9 and 17 may be modules of bluetooth, Wi-Fi, millimeter wave communication, wireless optical communication, etc. to implement data exchange between the transceiving ends. As shown in fig. 10, the power matching unit 13 is composed of a rectifier, a filter and a voltage regulator, and ensures that the finally output electric energy can meet the requirement of the equipment load 14. The energy coupling unit 12 is a coupling circuit. The second echo receiver 11 couples a part of the electromagnetic echo energy into the power matching unit 13 through the energy coupling unit 12, so as to supply the device load 14 with power.
Example 2
The embodiment provides an electromagnetic echo wireless energy transmission system based on a power amplification circuit, which includes the following specific contents:
amplification: as shown in fig. 11, in an electromagnetic echo wireless energy transmission system using a power amplification circuit, the power amplifier 3 of the transmitting terminal 1 is implemented by a power amplification circuit 24. The excitation source 8 and the power amplification circuit 24 ensure that the amplification factor of the signal is controllable. The amplification of the power amplifier circuit 24 is generally determined by its circuit parameters, while the excitation source 8 determines the upper limit of the output power that can be output.
Alignment: as in embodiment 1, the first direction backtracker 5 and the second direction backtracker 10 are direction backtracking array antennas, the first echo receiver 4 and the second echo receiver 11 are transceiver antennas of the direction backtracking array antennas, and the direction backtracker and the echo receiver are designed to be coupled. The receiving and transmitting antenna of the direction backtracking array antenna couples the electromagnetic echo 18 into the power amplifying circuit 24 through the shunt node of the transmitting end, and then reversely transmits the electromagnetic echo to the receiving end 2, so as to realize the self-adaptive alignment of the electromagnetic echo of the receiving and transmitting end. As shown in fig. 7, the first direction tracers 5 and 10 may alternatively be constituted by phase conjugate antennas and oscillation generators. The phase conjugate antenna may be designed as shown in fig. 8 and 9, or may be designed as shown in fig. 12 in which a power amplifier circuit is connected to a mixer at the transmitting end 1.
And (3) the other: the detection, control and other design are the same as in embodiment 1.
Example 3
The embodiment provides an electromagnetic echo wireless energy transmission system based on stimulated emission light amplification, which includes the following specific contents:
amplification: as shown in fig. 13, in an electromagnetic echo wireless energy transmission system using a stimulated emission light amplification device, the power amplifier 3 of the transmitting end 1 may be implemented by a stimulated emission light amplification device, which includes two components, a pumping module 25 and a stimulated emission light amplification module 26, and the electromagnetic echo 18 is stimulated and amplified by a stimulated emission principle. The pumping module 25 can adopt an electric pumping mode or an optical pumping mode; the stimulated emission light amplification module 26 is a gain medium including, but not limited to Yb: YAG flake crystal, VECSEL semiconductor gain material, THz QC-VECSEL crystal, etc.
Alignment: the first echo receiver 4 and the second echo receiver 11 are anti-reflection optical surfaces, so that the stimulated emission light amplification module 26 is prevented from being polluted by the environment; the first direction backtracking devices 5 and 10 are optical structures such as cat eye reflectors or arrays, pyramid prism reflectors or arrays and the like, and ensure that electromagnetic echoes at the transceiving ends realize self-adaptive alignment in a loop or collinear mode.
And (3) detection: the first monitoring unit 6 extracts an interactive response signal of the electromagnetic echo 18 and an external foreign object from the first direction backtracking module, such as various characteristic signals of space intensity, time intensity, frequency domain phase and the like, and notifies the first main control unit 7 to process the interactive response signal, so that the foreign object detection of the transmission channel is realized. The second monitoring unit 16 extracts the detection signal from the power matching unit 13 or the second direction backtracking module, and notifies the second main control unit 15 of processing, so as to implement anomaly detection, and if an anomaly occurs, notifies the first main control unit 7 of cooperative processing.
Controlling: the first main control unit 7 controls the first monitoring unit 6, the first direction backtracking module, the excitation source 8 and the first communication unit 9, and ensures controllable excitation amplification of the electromagnetic echo 18 from the aspects of foreign matter detection, anomaly detection and single amplification factor. The first main control unit 7 controls the excitation source 8 in real time through foreign matter detection and abnormality detection to realize control of the power amplifier 3 such as keeping, interrupting and restarting; the first main control unit 7 also comprises a preset control algorithm for controlling the output power of the excitation source 8, so as to realize the single amplification factor control of the power amplifier 3.
And (3) the other: the first communication units 9 and 17 may be modules of bluetooth, Wi-Fi, millimeter wave communication, wireless optical communication, etc. to implement data exchange between the transceiving ends. The power matching unit 13 is composed of a rectifier, a filter and a voltage stabilizer, and ensures that the finally output electric energy can meet the requirement of the equipment load 14. The energy coupling unit 12 is a photoelectric converter, such as a silicon-based vertical multi-junction photovoltaic cell with 40% photoelectric conversion efficiency. The second echo receiver 11 couples a part of the electromagnetic echo energy into the power matching unit 13 through the energy coupling unit 12, so as to supply the device load 14 with power.
Claims (10)
1. A wireless energy transfer system for electromagnetic echo excitation amplification, characterized in that the system comprises a transmitting end (1) and a receiving end (2) for forming an adaptive wireless energy transfer channel which constrains the energy of a transmitted electromagnetic echo (18) to and from a set lateral range.
2. An electromagnetic echo excitation amplified wireless energy transfer system according to claim 1, it is characterized in that the transmitting terminal (1) comprises an excitation source (8), a power amplifier (3) and a first direction backtracking module, the receiving terminal (2) comprises a second direction backtracking module, an energy coupling unit (12) and a power matching unit (13) which are connected in sequence, the first direction backtracking module and the second direction backtracking module are used for realizing the receiving and the reverse backtracking emission of electromagnetic waves, the power amplifier (3) amplifies the power of the electromagnetic wave passing through the first direction backtracking module, and the excitation source (8) provides energy, the energy coupling unit (12) couples the electromagnetic waves of the second direction backtracking module into output current, and the output current of the equipment load (14) is output through the power matching unit (13).
3. The wireless energy transmission system for excitation and amplification of electromagnetic echo according to claim 2, wherein the transmitting end (1) further comprises a first monitoring unit (6), a first main control unit (7) and a first communication unit (9), the receiving end (2) further comprises a second monitoring unit (16), a second main control unit (15) and a second communication unit (17), the low-power-density radiation propagation area exists outside the energy transmission channel of the back-and-forth transmission electromagnetic echo (18), the first monitoring unit (6) is connected with the first direction backtracking module to detect a physical state signal of the electromagnetic echo caused by the fact that an external foreign object enters the low-power-density radiation propagation area in real time, detect the foreign object and provide a safety detection signal for the first main control unit (7), and the first main control unit (7) is respectively connected with the first direction backtracking module, The first monitoring unit (6), the first communication unit (9) and the excitation source (8) are connected and are in bidirectional communication with the second main control unit (15) sequentially through the first communication unit (9) and the second communication unit (17), coordination control is achieved, the second main control unit (15) is connected with the equipment load (14), the second monitoring unit (16) and the second communication unit (17) respectively, the second monitoring unit (16) is connected with the second direction backtracking module, the second main control unit (15) and the power matching unit (13) respectively and used for extracting signals at the second direction backtracking module and the power matching unit (13), signal characteristics of a receiving end are monitored in real time, abnormal signal detection of the receiving end is conducted, and safety detection signals are provided for the second main control unit (15).
4. The wireless energy transmission system for excitation and amplification of electromagnetic echo according to claim 2, wherein the first direction backtracking module includes a first echo receiver (4) and a first direction backtracking device (5), the second direction backtracking module includes a second echo receiver (11) and a second direction backtracking device (10), and the first echo receiver (4), the first direction backtracking device (5), the second direction backtracking device (10), and the second echo receiver (11) together form a loop or a collinear wireless energy transmission channel, specifically:
the direction backtracking devices of the transmitting end (1) and the receiving end (2) convert small signal electromagnetic waves which are initially diverged and propagated into loop or collinear back-and-forth transmission electromagnetic echoes (18), after the back-and-forth transmission electromagnetic echoes (18) are incident to the first echo receiver (4) every time, the power is amplified by a power amplifier (3), then the power is transmitted to a receiving end (2) by a first direction retrospective device (5) along the incident direction and the reverse direction in a loop or collinear mode, after a back-and-forth transmission electromagnetic echo (18) enters a second echo receiver (11) every time, a part of energy is coupled and output by an energy coupling unit (12), the rest energy is transmitted to the transmitting end (1) in a loop or collinear mode along the incident direction by the second direction backtracking device (10), and the energy coupled and output by the energy coupling unit (12) is provided for the equipment load (14) through the power matching unit (13), so that mobile power supply is realized.
5. The wireless energy transmission system with electromagnetic echo excitation amplification according to claim 2, wherein the power amplifier (3) performs stimulated emission amplification on the electromagnetic waves or performs power amplification through a power amplifier device, and the power amplifier (3) adopts a microwave stimulated emission amplifier device, a power amplifier circuit or a stimulated emission optical amplifier device.
6. The wireless energy transmission system for excitation and amplification of electromagnetic echoes according to claim 4, characterized in that the first direction retroverter (5) and the second direction retroverter (10) employ active or passive devices, in particular direction retroverter array antennas, retro-reflectors or arrays. The direction backtracking array antenna is specifically a phase conjugate antenna, a self-steering array antenna and a VanAtta array antenna; the retro-reflector or the array is specifically an electromagnetic retro-reflector or an array, a cat-eye reflector or an array, or a pyramid prism reflector or an array.
7. The wireless energy transmission system for excitation and amplification of electromagnetic echo according to claim 6, wherein the first echo receiver (4) and the second echo receiver (11) are electromagnetic echo receivers, and particularly are transceiving antennas of a direction-retroactive array antenna or electromagnetic echo reflection-enhanced optical elements.
8. An electromagnetic echo excitation amplification wireless energy transfer system according to claim 1, wherein the electromagnetic wave in the adaptive wireless energy transfer channel has a wavelength range of 780nm-1 m.
9. A wireless energy transmission method using the wireless energy transmission system according to any one of claims 1 to 8, comprising the steps of:
1) a starting stage: when the receiving end is positioned in the working field range of the transmitting end and is ready to be charged, the transmitting end and the receiving end establish a communication link through the handshaking, authentication and authorization verification processes to prepare for establishing a wireless energy transmission channel;
2) an alignment stage: after a communication link is established, a transmitting end transmits a small electromagnetic wave signal which is divergently propagated, a receiving end receives the small electromagnetic wave signal through a second echo receiver (11), transmits a small electromagnetic signal echo to the transmitting end through a second direction backtracking device (10), the transmitting end receives the small electromagnetic signal and then utilizes a first monitoring unit (6) to perform safety detection on a wireless energy transmission channel, if the judgment result is unsafe, the communication link is reestablished, otherwise, charging is started and kept, and alignment of the wireless energy transmission channels of the transmitting end and the receiving end is completed;
3) a charging stage: the method comprises two sub-stages of charge retention and channel detection, and specifically comprises the following steps:
after alignment of small signal electromagnetic echoes is completed, power amplification is completed through a transmitting end power amplifier (3), the small signal electromagnetic echoes are transmitted back to a receiving end through a first direction backtracking device (5), the receiving end outputs and detects a part of energy in a coupling mode, the rest part of energy is transmitted back to the transmitting end through a second direction backtracking device (10), the electromagnetic echoes enter a first echo receiver (4), safety detection of a wireless energy transmission channel is completed through a first monitoring unit (6), whether charging is kept or not is judged, if the stable wireless energy transmission channel is kept and charging is continued, the electromagnetic echoes are continuously excited and amplified through the power amplifier (3), otherwise, the current excitation and amplification process is interrupted, and a communication link is reestablished.
10. The wireless energy transmission method according to claim 9, wherein the system detects the intrusion of the foreign object in real time through the first monitoring unit (6), and changes the transmission path of the wireless energy transmission channel after detecting the intrusion of the foreign object, specifically:
the spatial transformation of the wireless energy transmission channel is completed through a reflector or the relay transmission of the wireless energy is realized through a repeater, and the repeater is an active or passive reflector or antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910818272.5A CN110635582B (en) | 2019-08-30 | 2019-08-30 | Wireless energy transmission system for exciting and amplifying electromagnetic echo |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910818272.5A CN110635582B (en) | 2019-08-30 | 2019-08-30 | Wireless energy transmission system for exciting and amplifying electromagnetic echo |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110635582A true CN110635582A (en) | 2019-12-31 |
| CN110635582B CN110635582B (en) | 2021-03-26 |
Family
ID=68969822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910818272.5A Active CN110635582B (en) | 2019-08-30 | 2019-08-30 | Wireless energy transmission system for exciting and amplifying electromagnetic echo |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110635582B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021134611A1 (en) * | 2019-12-31 | 2021-07-08 | 华为技术有限公司 | Wireless charging method, transmitting end device and wireless charging device |
| CN113890204A (en) * | 2021-10-08 | 2022-01-04 | 杨士中 | Microwave power transmission system of space solar power station |
| WO2023228693A1 (en) * | 2022-05-24 | 2023-11-30 | 京セラ株式会社 | Power transmission system and power transmission method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893947A (en) * | 2010-07-19 | 2010-11-24 | 江阴天恒计算机信息技术有限公司 | Wireless power supply wireless mouse |
| CN102005828A (en) * | 2010-11-30 | 2011-04-06 | 电子科技大学 | Wireless sensor network node wireless charging system and method based on time reflection |
| CN102176635A (en) * | 2011-01-30 | 2011-09-07 | 基康仪器(北京)有限公司 | Automatic acquisition device for safety monitoring data as well as power-supply method and device thereof |
| US20170108585A1 (en) * | 2015-10-14 | 2017-04-20 | Delta Electronics, Inc. | Radio frequency energy-transmitting apparatus with location detection function and radio frequency energy-harvesting apparatus and radio frequency energy-transmitting method with location detection function |
| CN106856346A (en) * | 2017-01-23 | 2017-06-16 | 华南理工大学 | A kind of indoor wireless energy output system and wireless power transfer method |
| CN108832728A (en) * | 2018-06-24 | 2018-11-16 | 西安电子科技大学 | A kind of wireless energy transfer system and method based on direction backtracking antenna |
| CN109038861A (en) * | 2018-06-29 | 2018-12-18 | 深圳市宇能无线技术有限公司 | A kind of wireless power transfer method and system of wireless common source |
-
2019
- 2019-08-30 CN CN201910818272.5A patent/CN110635582B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893947A (en) * | 2010-07-19 | 2010-11-24 | 江阴天恒计算机信息技术有限公司 | Wireless power supply wireless mouse |
| CN102005828A (en) * | 2010-11-30 | 2011-04-06 | 电子科技大学 | Wireless sensor network node wireless charging system and method based on time reflection |
| CN102176635A (en) * | 2011-01-30 | 2011-09-07 | 基康仪器(北京)有限公司 | Automatic acquisition device for safety monitoring data as well as power-supply method and device thereof |
| US20170108585A1 (en) * | 2015-10-14 | 2017-04-20 | Delta Electronics, Inc. | Radio frequency energy-transmitting apparatus with location detection function and radio frequency energy-harvesting apparatus and radio frequency energy-transmitting method with location detection function |
| CN106856346A (en) * | 2017-01-23 | 2017-06-16 | 华南理工大学 | A kind of indoor wireless energy output system and wireless power transfer method |
| CN108832728A (en) * | 2018-06-24 | 2018-11-16 | 西安电子科技大学 | A kind of wireless energy transfer system and method based on direction backtracking antenna |
| CN109038861A (en) * | 2018-06-29 | 2018-12-18 | 深圳市宇能无线技术有限公司 | A kind of wireless power transfer method and system of wireless common source |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021134611A1 (en) * | 2019-12-31 | 2021-07-08 | 华为技术有限公司 | Wireless charging method, transmitting end device and wireless charging device |
| CN113890204A (en) * | 2021-10-08 | 2022-01-04 | 杨士中 | Microwave power transmission system of space solar power station |
| WO2023228693A1 (en) * | 2022-05-24 | 2023-11-30 | 京セラ株式会社 | Power transmission system and power transmission method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110635582B (en) | 2021-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110635582B (en) | Wireless energy transmission system for exciting and amplifying electromagnetic echo | |
| Shinohara | Trends in wireless power transfer: WPT technology for energy harvesting, mllimeter-wave/THz rectennas, MIMO-WPT, and advances in near-field WPT applications | |
| JP5916004B2 (en) | Power transmission device, power reception device, power supply system, and power supply method | |
| US9419476B2 (en) | Flat panel, stationary or mobile, spatially beam-formed wireless energy delivery system | |
| CN112073102A (en) | Secure beam forming method and device based on IRS | |
| EP1959825B1 (en) | Method and apparatus for high efficiency rectification for various loads | |
| KR101059657B1 (en) | Wireless power transceiver and method | |
| CN103441338B (en) | The phased active integrated antenna of a kind of remote controlled two dimensional surface | |
| US20080101798A1 (en) | Communication by radio waves and optical waveguides | |
| CN101873172B (en) | Millimeter wave generating device based on optic-fiber ring resonator and method thereof | |
| TW201911765A (en) | Millimeter wave repeater, millimeter wave transmission system, and millimeter wave transmission method | |
| Yoshida et al. | The aerospace wireless sensor network system compatible with microwave power transmission by time-and frequency-division operations | |
| CN106549511A (en) | Based on the visible laser far-distance wireless charging device for indicating light protection | |
| CN103412288A (en) | All-solid-state X-band portable radar beacon machine and signal processing method thereof | |
| CN104577332A (en) | Full-closed loop automatic tuning control device and method for improving stray isolation degree between antennas | |
| RU2355108C1 (en) | Double-channel transmitter | |
| Kawasaki et al. | High-power, high-efficiency microwave circuits and modules for wireless power transfer based on green-Eco technology | |
| Re et al. | An active retrodirective antenna element for circularly polarized wireless power transmission | |
| RU2356164C1 (en) | Impulse transmitter | |
| CN203288755U (en) | RoF-type phase control active integrated antenna array suitable for FDD system | |
| Su et al. | Physical layer security in SWIPT systems with nonlinear energy harvesting circuits | |
| CN114123979B (en) | Terahertz full-duplex common local oscillator solid-state front-end transmitting circuit | |
| Daiya et al. | Theoretical analysis on designing full functional device of WSN using wireless power transfer | |
| Pang et al. | Wireless Information and Power Transfer technology: An analysis | |
| Hayashi et al. | Experimental evaluation on RSSI-based phase optimization in microwave power transfer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |