Wireless power supply device

Abstract

Embodiments of the present application provide a wireless power supply device. By wirelessly supplying power to low-power terminals, the problems of inconvenient charging and high battery replacement costs for low-power terminals are mitigated. The wireless power supply device comprises: a signal processor, an antenna array, and at least one power division network. The signal processor comprises at least two signal transmission ends. The power division network is coupled between the at least two signal transmission ends and the antenna array. In addition, the power division network comprises at least one power division phase adjuster, and the power division phase adjuster comprises at least one bridge circuit and at least one phase shifter. The bridge circuit has two input ends respectively coupled to the two signal transmission ends, and two output ends coupled to the antenna array, and signals outputted by the two output ends of the bridge circuit are orthogonal in phase. The phase shifter is coupled to one input end or one output end of the bridge circuit.

Description

A wireless power supply device

[0001] This application claims priority to Chinese Patent Application No. 202510207433.2, filed on February 21, 2025, entitled "A Wireless Power Supply Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communication technology, and in particular to a wireless power supply device. Background Technology

[0003] With the development of communication technology, communication systems have evolved from demanding higher speeds and lower latency to pursuing intelligence, gradually giving rise to the need for the "Internet of Everything." Against this backdrop, a massive number of terminals will connect to the network system. These terminals include not only conventional mobile phones, tablets, automobiles, and smart wearable devices, but also various low-power terminals such as sensors, electronic tags, and electronic instruments. However, these low-power terminals all rely on battery power, which is inconvenient to charge, and the cost of battery replacement is far higher than the cost of the terminal itself. Therefore, how to reduce the battery replacement cost of low-power terminals is a pressing issue that needs to be addressed. Summary of the Invention

[0004] This application provides a wireless power supply device that improves the problems of inconvenient charging and high battery replacement costs for low-power terminals by wirelessly supplying power to them.

[0005] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0006] A first aspect of this application provides a wireless power supply device, comprising: a signal processor, an antenna array, and at least one power divider network. The signal processor includes at least two signal transmission terminals, and the power divider network is coupled between the at least two signal transmission terminals and the antenna array. Furthermore, the power divider network includes at least one power divider phase modulator, which includes at least one bridge circuit and at least one phase shifter. The two input terminals of the bridge circuit are respectively coupled to the two signal transmission terminals. The two output terminals of the bridge circuit are coupled to the antenna array, and the phases of the signals output from the two output terminals of the bridge circuit are orthogonal. A phase shifter is coupled to one output terminal or one input terminal of the bridge circuit.

[0007] In the wireless power supply device provided in this application embodiment, the signal processor transmits signals to the antenna array through at least two signal transmission terminals. The antenna array receives the signals transmitted by the wireless power supply device and sends the downlink power transmission signal to the low-power terminal, thereby realizing wireless power supply to the low-power terminal. Charging the low-power terminal wirelessly allows the low-power terminal to operate directly without a battery, or it can charge the battery of the low-power terminal wirelessly, thereby improving the problems of inconvenient charging and high battery replacement costs of low-power terminals.

[0008] Furthermore, a power divider network is coupled between at least two signal transmission terminals and an antenna array to process signals transmitted or received by the signal transmission terminals. The power divider network includes at least one power divider phase modulator, which can be used to distribute the power of the signal transmitted from the signal transmission terminals. The power divider phase modulator includes at least one bridge circuit, with its two inputs coupled to the two signal transmission terminals respectively for receiving signals from the signal transmission terminals, and its two outputs coupled to the antenna array for outputting the power-divided signal to the antenna array. The power divider phase modulator also includes at least one phase shifter, coupled to one input or one output of the bridge circuit. The phase shifter can be used to adjust the power distribution ratio of the output signals at the two outputs of the bridge circuit, allowing for more flexible power allocation. The antenna array can transmit downlink signals to the terminal at different power levels, reducing energy consumption while ensuring signal quality.

[0009] In some embodiments, at least one bridge circuit includes a first bridge circuit and a second bridge circuit, which are coupled together. This means the power divider phase regulator includes two bridge circuits, which improves the stability of the internal circuitry. Even if one of the first or second bridge circuits fails, the power divider phase regulator can still operate normally. Furthermore, the power distribution achieved by two bridge circuits offers greater control and allows for more varied power distribution compared to a single bridge circuit, thus better meeting the power distribution requirements in practical applications.

[0010] In some embodiments, at least one phase shifter is coupled between the first bridge circuit and the second bridge circuit. In this way, the phase shifter located between the first bridge circuit and the second bridge circuit can serve as an isolation and control element, reducing the direct coupling between the first bridge circuit and the second bridge circuit, and reducing the mutual interference between the first bridge circuit and the second bridge circuit.

[0011] In some embodiments, at least one phase shifter includes a first phase shifter and a second phase shifter. The first phase shifter is coupled between one output terminal of the first bridge circuit and one input terminal of the second bridge circuit, and the second phase shifter is coupled between the other output terminal of the first bridge circuit and the other input terminal of the second bridge circuit. In this way, the first phase shifter can be used to adjust the phase of a signal transmitted from one output terminal of the first bridge circuit to one input terminal of the second bridge circuit, and the second phase shifter can be used to adjust the phase of a signal transmitted from the other output terminal of the first bridge circuit to the other input terminal of the second bridge circuit. Adjusting the phase of two signals using two phase shifters is more flexible than adjusting the phase of two signals using a single phase shifter, thereby achieving finer power distribution.

[0012] In some embodiments, at least one bridge circuit includes a first bridge circuit, a second bridge circuit, a third bridge circuit, and a fourth bridge circuit. One output terminal of the first bridge circuit is coupled to one input terminal of the third bridge circuit, another output terminal of the first bridge circuit is coupled to one output terminal of the fourth bridge circuit, one output terminal of the second bridge circuit is coupled to another input terminal of the third bridge circuit, and another output terminal of the second bridge circuit is coupled to another output terminal of the fourth bridge circuit. At least one phase shifter is coupled between the first and third bridge circuits; and / or, at least one phase shifter is coupled between the first and fourth bridge circuits; and / or, at least one phase shifter is coupled between the second and third bridge circuits; and / or, at least one phase shifter is coupled between the second and fourth bridge circuits. Thus, the power divider phase adjuster includes four input terminals: two input terminals of the first bridge circuit and two input terminals of the second bridge circuit. The power divider phase adjuster also includes four output terminals: two output terminals of the third bridge circuit and two output terminals of the fourth bridge circuit. Power divider phase modulators with different numbers of input and output ports can provide more implementation methods for power distribution in power divider networks, adapting to scenarios with different power distribution requirements.

[0013] In some embodiments, the power divider network includes a first power divider phase modulator, a second power divider phase modulator, a third power divider phase modulator, and a fourth power divider phase modulator. One output terminal of the first power divider phase modulator is coupled to one input terminal of the third power divider phase modulator, and another output terminal of the first power divider phase modulator is coupled to one output terminal of the fourth power divider phase modulator. One output terminal of the second power divider phase modulator is coupled to another input terminal of the third power divider phase modulator, and another output terminal of the second power divider phase modulator is coupled to another output terminal of the fourth power divider phase modulator. Thus, the power divider network includes four input terminals: two input terminals of the first power divider phase modulator and two input terminals of the second power divider phase modulator. The power divider network also includes four output terminals: two output terminals of the third power divider phase modulator and two output terminals of the fourth power divider phase modulator. By directly using the power divider phase modulator, power redistribution of the signals output from the four output terminals can be achieved. Therefore, there is no need to consider the arrangement of multiple bridge circuits and multiple phase shifters between ports to achieve power redistribution, which can reduce development time and thus reduce costs.

[0014] In some embodiments, the power divider network further includes at least one power divider phase adjustment circuit. The power divider phase adjustment circuit includes a first power divider phase adjuster, a second power divider phase adjuster, a third power divider phase adjuster, and a fourth power divider phase adjuster. The two output terminals of the third power divider phase adjuster serve as the first output terminal and the second output terminal of the power divider phase adjustment circuit, respectively. At least one power divider phase adjustment circuit includes a first power divider phase adjustment circuit and a second power divider phase adjustment circuit. The power divider network also includes a fifth power divider phase adjuster, a sixth power divider phase adjuster, a seventh power divider phase adjuster, and an eighth power divider phase adjuster. The first output terminal of the first power-dividing phase adjustment circuit is connected to one output terminal of the fifth power-dividing phase adjuster; the second output terminal of the first power-dividing phase adjustment circuit is connected to one output terminal of the seventh power-dividing phase adjuster; the third output terminal of the first power-dividing phase adjustment circuit is connected to one output terminal of the sixth power-dividing phase adjuster; and the fourth output terminal of the first power-dividing phase adjustment circuit is connected to one output terminal of the eighth power-dividing phase adjuster. The first output terminal of the second power-dividing phase adjustment circuit is connected to the other output terminal of the fifth power-dividing phase adjuster; the second output terminal of the second power-dividing phase adjustment circuit is connected to the other output terminal of the seventh power-dividing phase adjuster; the third output terminal of the second power-dividing phase adjustment circuit is connected to the other output terminal of the sixth power-dividing phase adjuster; and the fourth output terminal of the second power-dividing phase adjustment circuit is connected to the other output terminal of the eighth power-dividing phase adjuster. Thus, the power-dividing network includes two power-dividing phase adjustment circuits and four individual power-dividing phase adjusters, meaning the power-dividing network comprises twelve power-dividing phase adjusters. This power-dividing network can adapt to power distribution scenarios with eight input ports and eight output ports.

[0015] In some embodiments, the wireless power supply device further includes at least one power divider, at least one output of the power divider network is electrically connected to the input of the power divider, and the output of the power divider is electrically connected to the antenna array. In this way, the signal from one signal transmission end can be electrically connected to multiple radiators in the antenna array through the power divider, thereby enabling more radiators to be placed in the antenna array without increasing the number of signal transmission ends, thus achieving a larger antenna array scale.

[0016] In some embodiments, the wireless power supply device includes a first power-dividing network and a second power-dividing network. The antenna array includes multiple radiating devices, each including a first radiator and a second radiator. The polarization directions of the first and second radiators are orthogonal. The first power-dividing network is connected to the first radiator, and the second power-dividing network is connected to the second radiator. In this way, the first radiators of the multiple radiating devices are connected to the first power-dividing network, and the second radiators of the multiple radiating devices are connected to the second power-dividing network. The first power-dividing network outputs a signal with one polarization direction, and the second power-dividing network outputs a signal with another polarization direction, which can better separate signals with different polarization directions and achieve orthogonal polarization directions of the first and second radiators.

[0017] In some embodiments, the antenna array further includes multiple subarrays, each subarray comprising multiple radiators, and the wireless power supply device includes multiple power divider networks, each power divider network being electrically connected to at least one subarray. In this way, since each power divider network is electrically connected to at least one subarray, and the power distribution ratio of all outputs of each power divider network can be adjusted by a phase shifter, power redistribution can be achieved within the radiators of the subarray connected to the same power divider network. With the same number of input and output ports, the scheme using multiple power divider networks has lower internal complexity and is easier to maintain than the scheme using a single power divider network.

[0018] A second aspect of this application provides a power redistribution method for a wireless power supply device. The method includes a terminal and any of the wireless power supply devices provided in the first aspect of this application. The wireless power supply device is used to charge the terminal.

[0019] In some embodiments, the power redistribution method of the wireless power supply device includes: the wireless charging device sending request information, the terminal receiving the request information and sending reporting information, and the wireless charging device receiving the reporting information. In one implementation, the reporting information may include charging power range, frequency range, required power, energy merging method, number of terminal channels, etc. In this way, the wireless power supply device can obtain the terminal's reporting information and prepare to charge the terminal.

[0020] In some embodiments, the power redistribution method of the wireless power supply device further includes: the terminal sending an uplink reference signal, and the wireless charging device receiving the uplink reference signal. In this way, the wireless power supply device can dynamically adjust the amplitude of the signal sent to the terminal based on the uplink reference signal, thereby reducing energy consumption while ensuring signal quality.

[0021] In some embodiments, the power redistribution method of the wireless power supply device further includes: the wireless charging device performing channel measurements to generate a channel matrix, a principal eigenvector, and precoding weights. In this way, the channel measurement results can be used to calculate the amplitude and phase of the output signal, providing a basis for the wireless charging device to perform amplitude and phase separation.

[0022] In some embodiments, the power redistribution method of the wireless power supply device further includes: the wireless charging device performing amplitude and phase separation to determine the amplitude and phase of the downlink power transmission signal. In this way, the wireless power supply device can be used to adjust the amplitude and phase of the output signal according to the amplitude and phase of the downlink power transmission signal, so as to send the downlink power transmission signal to the terminal with an appropriate amplitude and phase. In some embodiments, the wireless power supply device can send the downlink power transmission signal to the terminal with different amplitudes by adjusting the phase shifter in the power divider network.

[0023] In some embodiments, the power redistribution method of the wireless power supply device further includes: the wireless charging device sending a downlink power transmission signal, and the terminal receiving the downlink power transmission signal. In this way, the wireless power supply device can be used to power the terminal, improving the problem of high battery replacement costs for low-power terminals. Attached Figure Description

[0024] Figure 1 is a schematic diagram of a wireless power supply device provided by related technologies;

[0025] Figure 2 is a schematic diagram of another wireless power supply device provided by related technologies;

[0026] Figure 3 is a schematic diagram of another wireless power supply device provided by related technologies;

[0027] Figure 4 is a schematic diagram of another wireless power supply device provided by related technologies;

[0028] Figure 5 is a schematic diagram of a power divider phase adjuster provided in an embodiment of this application;

[0029] Figure 6 is a schematic diagram of a phase shifter provided in an embodiment of this application;

[0030] Figure 7 is a schematic diagram of another power divider phase regulator provided in an embodiment of this application;

[0031] Figure 8 is a simulation diagram of the matching coefficient of the power divider phase regulator shown in Figure 7;

[0032] Figure 9 is a simulation diagram of the transmission coefficient of the power divider phase regulator shown in Figure 7;

[0033] Figure 10 is a simulation diagram of another transmission coefficient of the power divider phase regulator shown in Figure 7;

[0034] Figure 11 is a simulation diagram of another transmission coefficient of the power divider phase regulator shown in Figure 7;

[0035] Figure 12 is a schematic diagram of another power divider phase regulator provided in an embodiment of this application;

[0036] Figure 13 is a schematic diagram of a power divider network provided in an embodiment of this application;

[0037] Figure 14 is a schematic diagram of another power splitting network provided in an embodiment of this application;

[0038] Figure 15 is a simulation diagram of the matching coefficients of the power splitting network shown in Figure 14;

[0039] Figure 16 is a simulation diagram of the transmission coefficient of the power divider phase regulator shown in Figure 14;

[0040] Figure 17 is a simulation diagram of another transmission coefficient of the power divider phase regulator shown in Figure 14;

[0041] Figure 18 is a simulation diagram of another transmission coefficient of the power divider phase regulator shown in Figure 14;

[0042] Figure 19 is a schematic diagram of a wireless power supply device provided in an embodiment of this application;

[0043] Figure 20 is a schematic diagram of another wireless power supply device provided in an embodiment of this application;

[0044] Figure 21 is a schematic diagram of another wireless power supply device provided in an embodiment of this application;

[0045] Figure 22 is a flowchart of a power redistribution method for a wireless power supply device provided in an embodiment of this application. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0047] In the description of this application, unless otherwise stated, " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B can mean A or B. The "and / or" in this application is merely a description of the relationship between the related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. A and B can be singular or plural.

[0048] Hereinafter, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of embodiments of this application, unless otherwise stated, "a plurality of" means two or more.

[0049] In the accompanying drawings of the embodiments of this application, components are indicated by arrowed guide lines, and parts are indicated by guide lines only.

[0050] Furthermore, in the embodiments of this application, directional terms such as "upper" and "lower" are defined relative to the orientation in which the components are schematically placed in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the orientation in which the components are placed in the accompanying drawings.

[0051] Smart home and industrial sensing and monitoring scenarios utilize low-power devices such as sensors, which require both power and communication. To reduce wiring and cabling, communication with these low-power devices has largely become wireless; however, they are still mostly powered by batteries.

[0052] Using batteries to power low-power devices is limited by the usage scenarios. For example, battery performance is limited in high-temperature and low-temperature environments, and batteries need to be replaced after they are depleted. With the increasing adoption of various low-power devices, the demand for wireless power supply for these devices is becoming increasingly strong.

[0053] To address this, related technologies provide a wireless power supply device for wirelessly powering a terminal. Figure 1 exemplarily illustrates a possible implementation of the wireless power supply device provided by the related technologies. As shown in Figure 1, the wireless power supply device 10 may include a signal processor 11 and an antenna. The wireless power supply device 10 supplies power to the terminal by emitting electromagnetic wave energy through the antenna.

[0054] The wireless power supply device 10 employs beamforming (BF) technology to focus energy. During beamforming, by controlling the relative phase and amplitude between the electromagnetic waves transmitted by the antenna, the energy of the electromagnetic waves in other directions is minimized, with most of the energy concentrated in the target direction. In some embodiments, continuing as shown in Figure 1, most of the electromagnetic wave energy is concentrated in the direction of the terminal 20. The low-power terminal 20 receives the electromagnetic wave energy and converts it into electrical energy, thereby achieving charging.

[0055] In some examples, the signal processor 11 can be a baseband, such as a baseband chip or baseband circuit. The signal processor 11 can be used to output signals to the antenna or to process signals received by the antenna. In some examples, the antenna can be an antenna array 12.

[0056] In some examples, the wireless power supply device 10 may include a radio remote unit (RRU), a signal processor 11 connected to the RRU, and the RRU connected to a radiator in the antenna array 12. In other examples, the antenna array 12 of the wireless power supply device 10 may include an active antenna unit (AAU).

[0057] In some embodiments, as shown in FIG1, the wireless power supply device 10 can be applied to scenarios where it is not suitable to power the terminal 20 with a battery. In this case, the terminal 20 may include a terminal antenna 21, a terminal controller 22, and an energy harvesting module 23. The terminal controller 22 is used to control the terminal antenna 21 to send direction-finding information to the wireless power supply device 10. The terminal antenna 21 is used to send direction-finding information and to transfer the energy of the electromagnetic waves emitted by the wireless power supply device 10 to the energy harvesting module 23. The energy harvesting module 23 is used to collect and store the energy of the electromagnetic waves. In this way, it is possible to avoid periodically replacing the battery of the terminal 20, and it also has the characteristics of being wireless and easy to deploy.

[0058] In other embodiments, as shown in FIG1, the wireless power supply device 10 can also be applied to scenarios where a battery is suitable for powering the terminal 20. In this case, the terminal 20 further includes an energy storage unit 24. The energy storage unit 24 is used to store the energy of electromagnetic waves and then power the terminal 20. In some examples, the energy storage unit 24 may include a battery. In this way, powering the battery of the terminal 20 wirelessly can avoid the need for periodic manual charging of the battery of the terminal 20.

[0059] The terminal 20 can be a sensor device used in smart home or industrial sensing and measurement scenarios, such as a temperature sensor, humidity sensor, water immersion sensor, door magnetic sensor, or infrared sensor. In some embodiments, the sensor is a low-power sensor. Low power consumption can refer to the sensor working continuously but consuming little power, or the sensor working periodically and sleeping during non-working hours, thus consuming little power. This application does not impose specific limitations on this embodiment.

[0060] Terminal 20 can also be an electronic tag for scenarios such as the Internet of Things (IoT) or radio frequency identification (RFID), such as an Electronic Toll Collection (ETC) electronic tag, an electronic tag embedded in an ID card, an electronic tag embedded in a city smart card, or an electronic tag embedded in an access control card. In some embodiments, the electronic tag is, for example, an electronic tag embedded in an ID card, which obtains energy through electromagnetic induction with a wireless power supply device to briefly power itself and complete one information exchange. In other embodiments, the electronic tag is, for example, an ETC electronic tag, which includes a battery and charges the battery through electromagnetic induction with a wireless power supply device.

[0061] Electronic tags, also known as tags, RFID tags, smart tags, RFID transponders, or RFID data carriers, typically consist of coupling elements and chips, with each tag having a unique identifier. In some examples, this identifier can be an electronic code. Electronic tags rely on RFID technology, using radio frequency communication for contactless, two-way data communication to read and write data, achieving target identification and data exchange. In some scenarios, electronic tags can be attached to objects to identify them. Identification using electronic tags requires no human intervention and can operate in various harsh environments. RFID technology can identify high-speed moving objects and can simultaneously identify multiple tags, offering quick and convenient operation.

[0062] Terminal 20 can also be an electronic instrument used in scenarios such as the Internet of Things (IoT), which can be applied to specific usage scenarios. In some embodiments, the electronic instrument can be used to detect the concentration of flammable and explosive gases. In this case, the electronic instrument is not suitable for wired power supply. Charging the electronic instrument wirelessly can solve the power supply problem.

[0063] In some embodiments, as shown in FIG2, the wireless power supply device 10 may be a digital beamforming (DBF) architecture. In this architecture, the signal processor 11 includes multiple signal transmission terminals 30 for transmitting or receiving signals. In some examples, each signal transmission terminal 30 is connected to a power amplifier 31, which is then connected to the respective radiators 60 of the antenna array 12.

[0064] In some embodiments, continuing as shown in FIG2, the antenna array 12 may include multiple radiators 60, each radiator 60 connected to a signal transmission terminal 30, and the signal processor 11 can independently adjust the phase of each radiator 60. However, the number of signal transmission terminals 30 in the signal processor 11 is limited, and the number of signal transmission terminals 30 needs to be increased by increasing the number of processing chips (not shown in the figure) in the signal processor 11 to achieve connection between each radiator 60 and a signal transmission terminal 30. The increase in the number of processing chips will lead to an increase in the overall power consumption of the wireless power supply device 10. Based on this, in some embodiments, the wireless power supply device also includes a power divider 32. The power divider 32 is coupled between the signal transmission terminal 30 and the radiator 60. In this way, one signal transmission terminal 30 can be connected to multiple radiators 60, also known as "one-to-many", which allows more radiators 60 to be set in the antenna array 12 without increasing the number of processing chips.

[0065] In other embodiments, as shown in FIG3, the wireless power supply device 10 may be an analog beamforming (ABF) architecture. Each signal transmission end 30 is also connected to at least one phase shifting unit 33, which is used to adjust the phase of each radiator in the antenna array 12.

[0066] In other embodiments, the wireless power supply device 10 may be a hybrid beamforming (HBF) architecture. The HBF architecture combines the advantages of both DBF and ABF architectures. Compared to DBF, HBF can reduce data processing, thus saving power. Compared to ABF, HBF can provide greater flexibility and reduce the number of phase shifters and attenuators in multi-beam scenarios.

[0067] In some embodiments, during the operation of the wireless power supply device 10, during transmission, the signal processor 11 generates or processes digital signals and outputs them from the signal transmission terminal 30. In the channel, the signal output from the signal transmission terminal 30 can undergo digital-to-analog conversion, power amplification, and other steps, and after preparation, it is transmitted through the antenna array 12. During reception, the antenna array 12 receives signals, and in the channel, the received signals can undergo filtering, amplification, and analog-to-digital conversion, converting them into intermediate frequency or baseband signals suitable for processing by the signal processor 11, and then sending them to the signal processor 11 for processing.

[0068] In this embodiment, the channel, also known as a signal channel or path, includes the entire transmission link from the signal source to the receiver, including the physical medium and all intermediate processing devices. For example, the channel includes a digital-to-analog converter, a radio frequency front-end, a power amplifier, a filter, a phase shifter, etc. In this embodiment, the signal transmission end 30 can be used for both transmitting and receiving signals; the following description focuses on the signal transmission end 30 being used for transmitting signals.

[0069] In some embodiments, during signal transmission, the wireless power supply device 10 can form a broadband signal by summing the weights of the subcarriers transmitted in each channel to ensure the maximum signal transmission rate or capacity. However, the peak power of the input signal of the broadband signal formed in this way is higher than the average power. In this case, the subcarrier superposition in the time domain will form a peak-to-average power ratio (PAPR) waveform. The PAPR waveform may cause the power amplifier 31 to enter the nonlinear operating region in the peak part of the signal. In the nonlinear operating region, the output signal of the power amplifier 31 is no longer proportional to the input signal, which will lead to signal distortion, generate additional harmonics and intermodulation products, and affect the communication quality.

[0070] In this case, the upper limit of the power supply of the wireless power supply device 10 depends on the amplification capability of the power amplifier 31, and the signals between each signal transmission terminal 30 are completely independent. To improve the problem of the power amplifier 31 being affected by PAPR waveforms, during signal transmission, the transmission power of the wireless power supply device 10 needs to be backed up by 8 to 10 dB according to the maximum capability of the power amplifier 31 (1 dB compression point). The 1 dB compression point refers to a point where the output power of the power amplifier reaches a certain level as the input power increases. After this point, the increase in output power begins to be less than the increase in input power, and the gain decreases by 1 dB. It is an indicator of amplifier linearity, indicating the threshold at which the amplifier begins to enter the nonlinear operating region.

[0071] Therefore, to ensure maximum transmission power, the wireless power supply device 10 typically selects the strongest subcarrier as the transmission frequency point during signal transmission, and each channel transmits at the same amplitude according to a 1dB compression point. Since the PAPR of the signal is high, some subcarriers may carry signals with significantly higher power than the average at specific times or under specific modulation conditions. The strongest subcarrier point refers to the single subcarrier with the highest power in the system.

[0072] In some embodiments, the signal amplitude transmitted by each channel of the wireless power supply device 10 changes dynamically with the operating environment. For example, a power control mechanism is used between the wireless power supply device 10 and the terminal 20, resulting in different signal amplitudes transmitted by each channel, and the same channel transmitting different signal amplitudes at different times.

[0073] In some examples, different channels of the wireless power supply device 10 are used to transmit signals to terminals 20 at different distances. In this way, both distant and nearby terminals 20 can obtain appropriate signal strength, achieving efficient use of resources.

[0074] In some examples, terminal 20 sends an uplink signal to wireless power supply 10, which adjusts the amplitude of the downlink signal based on the uplink signal and then sends the downlink signal back to terminal 20. This dynamic adjustment of the signal amplitude can reduce energy consumption while ensuring signal quality.

[0075] The signal amplitude and signal power are positively correlated. Adjusting the signal amplitude, i.e., adjusting the signal power, can be achieved through power backoff of the power amplifier 31. However, power backoff will reduce the charging efficiency between the wireless power supply device 10 and the terminal 20, and the energy consumption reduction benefits brought by the power control mechanism are insufficient to offset the loss caused by the reduced charging efficiency.

[0076] To simultaneously meet the requirements of the wireless power supply device 10 for maximum transmission power and the unequal power output between different channels, related technologies provide a wireless power supply device 10, as shown in Figure 4. The wireless power supply device 10 may further include a bridge circuit 51. Referring to Figures 4 and 5, the bridge circuit 51 can be considered a four-port network. This four-port network includes two input terminals, such as a first port D1 and a second port D2, which are respectively connected to two different signal transmission terminals 30. The four-port network also includes two output terminals, such as a third port D3 and a fourth port D4, which are respectively connected to two different radiating devices.

[0077] In some embodiments, the first port D1 is used to input a first input signal, the third port D3 is used to output a first output sub-signal, and the fourth port D4 is used to output a second output sub-signal. The amplitudes of the first output sub-signal and the second output sub-signal are equal and are half the amplitude of the first input signal. The first output sub-signal and the second output sub-signal are orthogonal in phase.

[0078] In some embodiments, the second port D2 is used to input the second input signal, the third port D3 is used to output the third output sub-signal, and the fourth port D4 is used to output the fourth output sub-signal. The amplitudes of the third and fourth output sub-signals are equal and are half the amplitude of the second input signal. The phases of the third and fourth output sub-signals are orthogonal.

[0079] In some embodiments, the first port D1 is used to input a first input signal, the second port D2 is used to input a second input signal, the third port D3 is used to output a superimposed signal of the first output sub-signal and the third output sub-signal, and the fourth port D4 is used to output a superimposed signal of the second output sub-signal and the fourth output sub-signal.

[0080] Based on this, ignoring the coupling and reflection within the bridge circuit 51, and assuming that the amplitudes of the first and second input signals are equal, and the phase of the first input signal is... The phase of the second input signal is The scattering matrix of a four-port network can be written as:

[0081] Therefore, the signal output from the third port D3 can be written as:

[0082] The signal output from port D4 can be written as:

[0083] Therefore, the power distribution ratio R between the signals output from the third port D3 and the fourth port D4 can be written as:

[0084] As can be seen from the above equation, the phase of the first input signal can be adjusted to... The phase of the second input signal is The power distribution ratio R is adjusted to achieve unequal power outputs at ports D3 and D4 when the first port D1 and the second port D2 have equal power inputs. In this way, the maximum transmission power of the wireless power supply device 10 is still the sum of the power of all signal transmission terminals 30, and the power (or amplitude) of the two signal transmission terminals 30 connected to the same bridge circuit 51 can be dynamically adjusted.

[0085] However, this related technology can only achieve dynamic adjustment of power between two signal transmission terminals 30 connected to the same bridge circuit 51, and cannot achieve dynamic adjustment of power between all signal transmission terminals 30, and still cannot meet the demand for unequal power output between all channels.

[0086] Furthermore, in this related technology, the power allocation ratio R also depends on the phase of the first input signal. The phase of the second input signal is To achieve dynamic amplitude adjustment, the phase relationship between the signals transmitted by the signal transmission terminals 30 connected to the first port D1 and the second port D2 needs to be constrained. Otherwise, the phases transmitted by the two signal transmission terminals 30 connected to the same bridge circuit 51 cannot be adjusted independently, reducing the precoding degrees of freedom of the digital channel.

[0087] Therefore, this application provides a wireless power supply device 10, which includes a power divider network and at least one power divider phase modulator. As shown in FIG. 5, the power divider phase modulator 50 includes at least one bridge circuit 51 and at least one phase shifter 52. The two input terminals of the bridge circuit 51 are coupled to two signal transmission terminals 30, respectively, and the two output terminals of the bridge circuit 51 are coupled to an antenna array 12, with the phases of the signals output from the two output terminals of the bridge circuit 51 being orthogonal. A phase shifter 52 is coupled to one input terminal or one output terminal of the bridge circuit 51.

[0088] This application does not limit the form of the bridge circuit 51. The bridge circuit 51 can be a resistive bridge, a capacitive bridge, an inductive bridge, etc. In some embodiments, the bridge circuit 51 includes two input terminals and two output terminals. The two input terminals are used to input two signals, such as a first input signal and a second input signal. The first input signal is divided into a first output sub-signal and a second output sub-signal with equal power, and the second input signal is divided into a third output sub-signal and a fourth output sub-signal with equal power. The two output terminals are used to output two processed signals. For example, one output terminal outputs the superposition signal of the first output sub-signal and the second output sub-signal, and the other output terminal outputs the superposition signal of the third output sub-signal and the fourth output sub-signal.

[0089] This application does not limit the form of the phase shifter 52. The phase shifter 52 can be a loaded phase shifter, a reflective bridge type phase shifter, a filtered phase shifter, or a time-delay phase shifter, etc. In some embodiments, as shown in FIG6, the phase shifter 52 may include a first capacitor C1, a second capacitor C2, and an inductor Ls. The capacitance of the first capacitor C1 is equal to the capacitance of the second capacitor C2. In this case, let the inductance of the inductor Ls be L, the capacitance of the first capacitor C1 and the second capacitor C2 both be C, the angular frequency corresponding to the operating frequency of the phase shifter 52 be ω, and the phase of the phase shifter 52 can be written as:

[0090] Based on this, in some examples, the inductor Ls may include a variable inductor, and the phase of the phase shifter 52 can be adjusted by adjusting the size of the inductor. In some examples, both the first capacitor C1 and the second capacitor C2 may include variable capacitors, and the phase of the phase shifter 52 can be adjusted by adjusting the size of the first capacitor C1 and the second capacitor C2.

[0091] In some examples, as shown in Figure 5, the power divider phase adjuster 50 includes a first bridge circuit 511 and a first phase shifter 521, the first phase shifter 521 being coupled to one of the outputs of the first bridge circuit 511. In some examples, the first phase shifter 521 may also be coupled to one of the inputs of the first bridge circuit 511.

[0092] In some examples, continuing as shown in Figure 5, the power divider phase adjuster 50 may also include a second phase shifter 522. The first phase shifter 521 is coupled to one output of the first bridge circuit 511 with a phase of θ1; the second phase shifter 522 is coupled to the other output of the first bridge circuit 511 with a phase of θ2. In this case, the power divider phase adjuster 50 can be considered as a four-port network, and the scattering matrix of this four-port network can be written as:

[0093] Therefore, the signal output from the third port D3 can be written as:

[0094] The signal output from port D4 can be written as:

[0095] Therefore, the power distribution ratio R between the signals output from the third port D3 and the fourth port D4 can be written as:

[0096] As shown in the above equation, the power distribution ratio R can be adjusted by adjusting the phases θ1 and / or θ2 of the two phase shifters 52. This allows for unequal power outputs at the third port D3 and the fourth port D4 when the first port D1 and the second port D2 have equal power inputs. Furthermore, the signals transmitted by the two signal transmission terminals 30 connected to the first port D1 and the second port D2 can be adjusted independently, thereby increasing the precoding degrees of freedom of these two signal transmission terminals 30.

[0097] In some embodiments, the signal transmitted from the first port D1 to the third port D3 is completely independent of the signal transmitted from the second port D2 to the third port D3. The signal transmitted from the first port D1 to the fourth port D4 is also completely independent of the signal transmitted from the second port D2 to the fourth port D4. The power distribution ratio R between the signals output from the third port D3 and the fourth port D4 can also be written as:

[0098] In some embodiments, as shown in FIG7, the power divider phase adjuster 50 may further include a second bridge circuit 512, with the first bridge circuit 511 and the second bridge circuit 512 coupled together. The phase shifter 52 may be coupled to the input terminal of the first bridge circuit 511 or the output terminal of the second bridge circuit 512.

[0099] In some embodiments, the phase shifter 52 can also be located between the first bridge circuit 511 and the second bridge circuit 512. In this way, the phase shifter 52 located between the first bridge circuit and the second bridge circuit can serve as an isolation and control element, reducing the direct coupling between the first bridge circuit and the second bridge circuit, and reducing the mutual interference between the first bridge circuit and the second bridge circuit.

[0100] In some embodiments, the phase shifter 52 includes a first phase shifter 521 and a second phase shifter 522. The first phase shifter 521 is coupled between one output terminal of the first bridge circuit 511 and one input terminal of the second bridge circuit 512, and the second phase shifter 522 is coupled between the other output terminal of the first bridge circuit 511 and the other input terminal of the second bridge circuit 512.

[0101] In this way, the first phase shifter 521 can be used to adjust the phase of the signal transmitted from one output terminal of the first bridge circuit 511 to one input terminal of the second bridge circuit 512, and the second phase shifter 522 can be used to adjust the phase of the signal transmitted from the other output terminal of the first bridge circuit 511 to the other input terminal of the second bridge circuit 512. Using two phase shifters to achieve the power distribution ratio R is more flexible than using one phase shifter to adjust the power distribution ratio R, and can achieve finer power distribution.

[0102] In some embodiments, in the power divider phase adjuster 50 shown in FIG. 7, the first phase shifter 521 and the second phase shifter 522 adopt the form shown in FIG. 6, and the first capacitor C1 and the second capacitor C2 are variable capacitors. In some examples, the capacitance C of the first capacitor C1 and the second capacitor C2 is in the range of 0.6pF to 2.0pF, which can satisfy the phase adjustment of the first phase shifter 521 and the second phase shifter 522 from 0° to 90°.

[0103] Based on this, the electrical performance of the power divider phase regulator 50 was simulated at an operating frequency near 2.4 GHz. Figure 8 shows the matching coefficients of the power divider phase regulator 50. Within the operating frequency, the matching coefficients S11 of the power divider phase regulator 50 are all less than -20 dB, indicating that the power divider phase regulator 50 is well matched within the operating frequency.

[0104] As shown in Figure 9, the phase θ1 of the first phase shifter 521 is the same as the phase θ2 of the second phase shifter 522. Curve ① is the transmission curve from the first port to the third port (i.e., curve S31), and curve ② is the transmission curve from the first port to the fourth port (i.e., curve S41). At a frequency of 2.39 GHz, curves ① and ② intersect, and the power distribution ratio R of the signals output from the third port D3 and the fourth port D4 is close to 1:1.

[0105] As shown in Figure 10, the phase θ1 of the first phase shifter 521 is 90°, and the phase θ2 of the second phase shifter 522 is 0°. Curve ① is the transmission curve from the first port to the third port (i.e., curve S31), and curve ② is the transmission curve from the first port to the fourth port (i.e., curve S41). At a frequency of 2.39 GHz, S31 = 0.1 dB, S32 = 41 dB, and the power distribution ratio R of the signals output from the third port D3 and the fourth port D4 can reach 0.1 dB: 41 dB.

[0106] As shown in Figure 11, the phase θ1 of the first phase shifter 521 is 0°, and the phase θ2 of the second phase shifter 522 is 90°. Curve ① is the transmission curve from the first port to the third port (i.e., curve S31), and curve ② is the transmission curve from the first port to the fourth port (i.e., curve S41). At a frequency of 2.39 GHz, S31 = 41 dB, S32 = 0.1 dB, and the power distribution ratio R of the signals output from the third port D3 and the fourth port D4 can reach 41 dB: 0.1 dB.

[0107] By adjusting the phase θ1 of the first phase shifter 521 and the phase θ2 of the second phase shifter 522 between 0° and 90°, the third port D3 and the fourth port D4 can satisfy a power distribution with a difference greater than 40dB. This allows the radiator connected to the third port D3 and the radiator connected to the fourth port D4 to have unequal power outputs when the signal transmission end has equal power input, and the output power difference can be greater than 40dB.

[0108] In some embodiments, as shown in FIG12, the bridge circuit 51 includes a first bridge circuit 511, a second bridge circuit 512, a third bridge circuit 513, and a fourth bridge circuit 514. One output terminal of the first bridge circuit 511 is coupled to one input terminal of the third bridge circuit 513, and the other output terminal of the first bridge circuit 511 is coupled to one output terminal of the fourth bridge circuit 514. One output terminal of the second bridge circuit 512 is coupled to the other input terminal of the third bridge circuit 513, and the other output terminal of the second bridge circuit 512 is coupled to the other output terminal of the fourth bridge circuit 514.

[0109] Continuing with Figure 12, in some examples, phase shifter 52 includes a first phase shifter 521 coupled between a first bridge circuit 511 and a third bridge circuit 513. In some examples, phase shifter 52 includes a second phase shifter 522 coupled between the first bridge circuit 511 and a fourth bridge circuit 514. In some examples, phase shifter 52 includes a third phase shifter 523 coupled between the second bridge circuit 512 and the third bridge circuit 513. In some examples, phase shifter 52 includes a fourth phase shifter 524 coupled between the second bridge circuit 512 and the fourth bridge circuit 514.

[0110] In this configuration, the power divider phase modulator 50 includes four input terminals: port 1 (D1), port 2 (D2), port 3 (D3), and port 4 (D4). The power divider phase modulator 50 also includes four output terminals: port 5 (D5), port 6 (D6), port 7 (D7), and port 8 (D8). Power divider phase modulators with varying numbers of input and output ports can provide more implementation methods for power distribution in power-sharing networks, adapting to scenarios with different power distribution requirements.

[0111] This application does not limit the number of input and output terminals of the power divider phase adjuster 50; the number of input and output terminals can be two or more. For ease of explanation, the following description uses an example where the power divider phase adjuster 50 includes two input terminals and two output terminals.

[0112] In some embodiments, as shown in FIG13, the power divider network 13 includes a first power divider phase adjuster 501, a second power divider phase adjuster 502, a third power divider phase adjuster 503, and a fourth power divider phase adjuster 504. One output terminal of the first power divider phase adjuster 501 is coupled to one input terminal of the third power divider phase adjuster 503, and the other output terminal of the first power divider phase adjuster 501 is coupled to one output terminal of the fourth power divider phase adjuster 504. One output terminal of the second power divider phase adjuster 502 is coupled to another input terminal of the third power divider phase adjuster 503, and the other output terminal of the second power divider phase adjuster 502 is coupled to another output terminal of the fourth power divider phase adjuster 504.

[0113] In this configuration, the power divider network 13 includes four input terminals: the first port D1 and the second port D2 are the two input terminals of the first power divider phase adjuster 501; the third port D3 and the fourth port D4 are the two input terminals of the second power divider phase adjuster 502. The power divider network 13 also includes four output terminals: the fifth port D5 and the sixth port D6 are the two output terminals of the third power divider phase adjuster 503; and the seventh port D7 and the eighth port D8 are the two output terminals of the fourth power divider phase adjuster 504. By directly using the power divider phase adjuster 50, power redistribution of the signals output from the four output terminals can be achieved. Therefore, there is no need to consider the configuration of multiple bridge circuits and multiple phase shifters between the ports to achieve power redistribution, which reduces development time and thus lowers costs.

[0114] In some embodiments, as shown in FIG14, the power divider network 13 further includes at least one power divider phase adjustment circuit 500. The power divider phase adjustment circuit 500 includes a first power divider phase adjuster 501, a second power divider phase adjuster 502, a third power divider phase adjuster 503, and a fourth power divider phase adjuster 504. The two output terminals of the third power divider phase adjuster 503 serve as the first output terminal O1 and the second output terminal O2 of the power divider phase adjustment circuit 500, respectively, and the two output terminals of the third power divider phase adjuster 503 serve as the third output terminal O3 and the fourth output terminal O4 of the power divider phase adjustment circuit 500, respectively.

[0115] In some examples, continuing as shown in Figure 14, at least one power divider phase adjustment circuit 500 includes a first power divider phase adjustment circuit 5001 and a second power divider phase adjustment circuit 5002. The power divider network 13 also includes a fifth power divider phase adjuster 505, a sixth power divider phase adjuster 506, a seventh power divider phase adjuster 507, and an eighth power divider phase adjuster 508.

[0116] The first output terminal 01 of the first power-dividing phase adjustment circuit 5001 is connected to one output terminal of the fifth power-dividing phase adjuster 505. The second output terminal 02 of the first power-dividing phase adjustment circuit 5001 is connected to one output terminal of the seventh power-dividing phase adjuster 507. The third output terminal 03 of the first power-dividing phase adjustment circuit 500 is connected to one output terminal of the sixth power-dividing phase adjuster 506. The fourth output terminal 04 of the first power-dividing phase adjustment circuit 500 is connected to one output terminal of the eighth power-dividing phase adjuster 508.

[0117] The first output terminal 01 of the second power-dividing phase adjustment circuit 5002 is connected to the other output terminal of the fifth power-dividing phase adjuster 505. The second output terminal 02 of the second power-dividing phase adjustment circuit 5002 is connected to the other output terminal of the seventh power-dividing phase adjuster 507. The third output terminal 03 of the second power-dividing phase adjustment circuit 5002 is connected to the other output terminal of the sixth power-dividing phase adjuster 506. The fourth output terminal 04 of the second power-dividing phase adjustment circuit 500 is connected to the other output terminal of the eighth power-dividing phase adjuster 508.

[0118] Thus, the power divider network 13 includes two power divider phase adjustment circuits 500 and four individual power divider phase adjusters 50, that is, the power divider network 13 includes twelve power divider phase adjusters 50. This power divider network 13 can adapt to power distribution scenarios with eight input ports and eight output ports. The eight input ports may include port 1 (D1), port 2 (D2), port 3 (D3), port 4 (D4), port 5 (D5), port 6 (D6), port 7 (D7), and port 8 (D8). The eight output ports may include port 9 (D9), port 10 (D10), port 11 (D11), port 12 (D12), port 13 (D13), port 14 (D14), port 15 (D15), and port 16 (D16).

[0119] In some embodiments, in the power divider network 13 shown in FIG. 14, the power divider phase modulator 50 adopts the form shown in FIG. 7. Based on this, the electrical performance of the power divider network 13 is simulated at an operating frequency near 2.4 GHz. FIG. 15 shows the matching coefficients of the power divider network 13. Within the operating frequency, the matching coefficients S11 of the power divider network 13 are all less than -25 dB, indicating that the power divider network 13 is well matched within the operating frequency.

[0120] As shown in Figure 16, the phase θ1 of the first phase shifter 521 and the phase θ2 of the second phase shifter 522 in all power divider phase adjusters 50 are the same. The eight curves correspond to the transmission curves S91 from the first port D1 to the ninth port D9, S101 from the first port D1 to the tenth port D10, S111 from the first port D1 to the eleventh port D11, S121 from the first port D1 to the twelfth port D12, S131 from the first port D1 to the thirteenth port D13, S141 from the first port D1 to the fourteenth port D14, S151 from the first port D1 to the fifteenth port D15, and S161 from the first port D1 to the sixteenth port D16, as shown in Figure 14. At a frequency of 2.4 GHz, the eight curves intersect, and the power distribution ratio R of the signals at the eight output ports is close to 1.

[0121] As shown in Figure 17, by adjusting the phase θ1 of the first phase shifter 521 and the phase θ2 of the second phase shifter 522 in the power divider phase regulator 50, all power is allocated to the ninth port D9. Curve ① is the transmission curve S91 from the first port D1 to the ninth port D9, and curve ② is the transmission curve with the smallest difference at 2.4GHz compared to curve ①. The difference in transmission coefficient is about 40dB, and the power allocation ratio R can reach 100dB:60dB.

[0122] As shown in Figure 18, by adjusting the phase θ1 of the first phase shifter 521 and the phase θ2 of the second phase shifter 522 in the power divider phase regulator 50, all power is allocated to the sixteenth port D16. Curve ① is the transmission curve S161 from the first port D1 to the sixteenth port D16, and curve ② is the transmission curve with the smallest difference at 2.4GHz compared to curve ①. The difference in transmission coefficients is about 35dB, and the power allocation ratio R can reach 78dB:43dB.

[0123] Furthermore, when the power divider network shown in Figure 14 is used in an eight-input eight-output wireless charging device 10, and clustered delay line (CDL) channel simulation is performed, compared with the eight-input eight-output wireless charging device 10 of the related technology shown in Figure 2 or Figure 3, both broadband time inversion and narrowband time inversion show an additional gain of about 1 dB. This additional gain has the potential to be further improved as the size of the antenna array 12 increases.

[0124] In some embodiments, as shown in FIG19, the wireless power supply device 10 may further include at least one power divider 32. In some embodiments, the power divider 32 is, for example, a first power divider 321, with at least one output terminal of the power dividing network 13 electrically connected to an input terminal of the first power divider 321, and the output terminal of the first power divider 321 electrically connected to the antenna array. In some embodiments, the power divider 32 is, for example, a second power divider 322, with at least one input terminal of the power dividing network 13 electrically connected to an output terminal of the second power divider 322, and the input terminal of the second power divider 322 electrically connected to a signal transmission terminal.

[0125] In this way, the signal from one signal transmission end can be electrically connected to multiple radiators in the antenna array through the power divider 32, thereby setting more radiators in the antenna array without increasing the number of signal transmission ends, and achieving a larger antenna array scale.

[0126] In some embodiments, as shown in FIG20, the wireless power supply device 10 includes a first power divider network 131 and a second power divider network 132. The antenna array 12 includes a plurality of radiating devices 40, each radiating device 40 including a first radiator 41 and a second radiator 42, the polarization directions of the first radiator 41 and the second radiator 42 being orthogonal. The first power divider network 131 is connected to the first radiator 41, and the second power divider network 132 is connected to the second radiator 42.

[0127] In this way, the first radiator 41 of the multiple radiating devices 40 is connected to the first power divider network 131, and the second radiator 42 of the multiple radiating devices 40 is connected to the second power divider network 132. The first power divider network 131 outputs a signal in one polarization direction, and the second power divider network 132 outputs a signal in another polarization direction. This can better separate signals with different polarization directions and achieve orthogonal polarization directions of the first radiator 41 and the second radiator 42.

[0128] In some embodiments, as shown in FIG21, the antenna array 12 further includes multiple subarrays, such as a first subarray 121, a second subarray 122, a third subarray 123, a fourth subarray 124, and a fifth subarray 125, each subarray including multiple radiators 60. The wireless power supply device 10 includes multiple power divider networks 13, such as a first power divider network 131, a second power divider network 132, and a third power divider network 133. Each power divider network 13 is electrically connected to at least one subarray.

[0129] For example, the first power distribution network 131 and the first subarray 121 are electrically connected. For example, the second power distribution network 132 and the second subarray 122 are electrically connected. For example, the third power distribution network 133 and the third subarray 123, the fourth subarray 124 and the fifth subarray 125 are electrically connected. This application embodiment does not limit the number of radiators in the subarrays or the arrangement of the radiators in the subarrays. For example, the first subarray 121 includes four radiators 60, and the fourth subarray 124 includes two radiators 60. For example, the radiator arrangements in the first subarray 121 and the fourth subarray 124 are different.

[0130] In this way, since each power divider network is electrically connected to at least one subarray, and the power distribution ratio of all outputs of each power divider network can be adjusted by a phase shifter, power redistribution can be achieved within the radiators 60 of the subarray connected to the same power divider network. Using multiple power divider networks 13 with fewer input / output ports instead of one power divider network 13 with more input / output ports can reduce the complexity of a single power divider network 13.

[0131] This application also provides a power redistribution method for a wireless power supply device. The method includes a terminal and any of the aforementioned wireless power supply devices, the wireless power supply device being used to charge the terminal.

[0132] In some embodiments, as shown in FIG22, the power redistribution method of the wireless power supply device includes S101, in which the wireless charging device sends request information, the terminal receives the request information and sends reporting information, and the wireless charging device receives the reporting information. In one implementation, the reporting information may include charging power range, frequency range, required power, energy merging method, number of terminal channels, etc. In this way, the wireless power supply device can obtain the reporting information of the terminal and prepare to charge the terminal.

[0133] In some embodiments, the power redistribution method of the wireless power supply device further includes S102, whereby the terminal sends an uplink reference signal and the wireless charging device receives the uplink reference signal. In this way, the wireless power supply device can dynamically adjust the amplitude of the signal sent to the terminal based on the uplink reference signal, thereby reducing energy consumption while ensuring signal quality.

[0134] In some embodiments, the power redistribution method of the wireless power supply device further includes S103, in which the wireless charging device performs channel measurement and generates a channel matrix, a principal eigenvector, and precoding weights. In this way, the channel measurement results can be used to calculate the amplitude and phase of the output signal, providing a basis for the wireless charging device to perform amplitude and phase separation.

[0135] In some embodiments, the power redistribution method of the wireless power supply device further includes S104, whereby the wireless charging device performs amplitude and phase separation to determine the amplitude and phase of the downlink power transmission signal. In this way, the wireless power supply device can be used to adjust the amplitude and phase of the output signal. Based on the amplitude and phase of the downlink power transmission signal, the amplitude and phase of the output signal are adjusted to send the downlink power transmission signal to the terminal with an appropriate amplitude and phase. In some embodiments, the wireless charging device adjusts the phase of the output signal through a phase shifting unit and adjusts the amplitude of the output signal through a power divider network and a power amplifier. In some embodiments, the wireless power supply device can send the downlink power transmission signal to the terminal with different amplitudes by adjusting the phase shifters in the power divider network.

[0136] In some embodiments, the power redistribution method of the wireless power supply device further includes S105, in which the wireless charging device sends a downlink power transmission signal, and the terminal receives the downlink power transmission signal. In this way, the wireless power supply device can be used to power the terminal, improving the problem of high battery replacement costs for low-power terminals.

[0137] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0138] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A wireless power supply device, characterized by comprising: include: Signal processor; The signal processor includes at least two signal transmission ends; Antenna array; At least one power divider network is coupled between at least two of the signal transmission ends and the antenna array; The power divider network includes at least one power divider phase adjuster; the power divider phase adjuster includes at least one bridge circuit and at least one phase shifter; In this circuit, the two input terminals of one bridge circuit are coupled to the two signal transmission terminals respectively; the two output terminals of one bridge circuit are coupled to the antenna array, and the phases of the signals output from the two output terminals of the bridge circuit are orthogonal; and a phase shifter is coupled to one input terminal or one output terminal of the bridge circuit.

2. The wireless power supply device of claim 1, wherein, The at least one bridge circuit includes a first bridge circuit and a second bridge circuit; the first bridge circuit and the second bridge circuit are coupled.

3. The wireless power supply device of claim 2, wherein, The at least one phase shifter is coupled between the first bridge circuit and the second bridge circuit.

4. The wireless power supply device according to claim 2 or 3, characterized by The at least one phase shifter includes a first phase shifter and a second phase shifter; the first phase shifter is coupled between an output terminal of the first bridge circuit and an input terminal of the second bridge circuit; The second phase shifter is coupled between another output terminal of the first bridge circuit and another input terminal of the second bridge circuit.

5. The wireless power supply device of claim 1, wherein, The at least one bridge circuit includes a first bridge circuit, a second bridge circuit, a third bridge circuit, and a fourth bridge circuit. One output terminal of the first bridge circuit is coupled to one input terminal of the third bridge circuit; the other output terminal of the first bridge circuit is coupled to one output terminal of the fourth bridge circuit. One output terminal of the second bridge circuit is coupled to the other input terminal of the third bridge circuit; the other output terminal of the second bridge circuit is coupled to the other output terminal of the fourth bridge circuit. The at least one phase shifter is coupled between the first bridge circuit and the third bridge circuit; and / or, The at least one phase shifter is coupled between the first bridge circuit and the fourth bridge circuit; And / or, The at least one phase shifter is coupled between the second bridge circuit and the third bridge circuit; and / or, The at least one phase shifter is coupled between the second bridge circuit and the fourth bridge circuit.

6. The wireless power supply device according to any one of claims 1 to 5, wherein The power divider network includes a first power divider phase adjuster, a second power divider phase adjuster, a third power divider phase adjuster, and a fourth power divider phase adjuster. One output terminal of the first power divider phase regulator is coupled to one input terminal of the third power divider phase regulator; the other output terminal of the first power divider phase regulator is coupled to one output terminal of the fourth power divider phase regulator. One output terminal of the second power divider phase regulator is coupled to the other input terminal of the third power divider phase regulator; the other output terminal of the second power divider phase regulator is coupled to the other output terminal of the fourth power divider phase regulator.

7. The wireless power supply device of claim 6, wherein, The power divider network further includes at least one power divider phase adjustment circuit; the power divider phase adjustment circuit includes a first power divider phase adjuster, a second power divider phase adjuster, a third power divider phase adjuster, and a fourth power divider phase adjuster; the two output terminals of the third power divider phase adjuster serve as the first output terminal and the second output terminal of the power divider phase adjustment circuit, respectively; the two output terminals of the third power divider phase adjuster serve as the third output terminal and the fourth output terminal of the power divider phase adjustment circuit, respectively. The at least one power-dividing phase adjustment circuit includes a first power-dividing phase adjustment circuit and a second power-dividing phase adjustment circuit. The power divider network also includes a fifth power divider phase adjuster, a sixth power divider phase adjuster, a seventh power divider phase adjuster, and an eighth power divider phase adjuster. The first output terminal of the first power-dividing phase adjustment circuit is connected to one output terminal of the fifth power-dividing phase adjuster; the second output terminal of the first power-dividing phase adjustment circuit is connected to one output terminal of the seventh power-dividing phase adjuster; the third output terminal of the first power-dividing phase adjustment circuit is connected to one output terminal of the sixth power-dividing phase adjuster; and the fourth output terminal of the first power-dividing phase adjustment circuit is connected to one output terminal of the eighth power-dividing phase adjuster. The first output terminal of the second power-dividing phase adjustment circuit is connected to the other output terminal of the fifth power-dividing phase adjuster; the second output terminal of the second power-dividing phase adjustment circuit is connected to the other output terminal of the seventh power-dividing phase adjuster; the third output terminal of the second power-dividing phase adjustment circuit is connected to the other output terminal of the sixth power-dividing phase adjuster; and the fourth output terminal of the second power-dividing phase adjustment circuit is connected to the other output terminal of the eighth power-dividing phase adjuster.

8. The wireless power supply device according to any one of claims 1 to 7, characterized by, The wireless power supply device also includes at least one power divider; At least one output of the power divider network is electrically connected to the input of one of the power dividers; the output of the power divider is electrically connected to the antenna array.

9. The wireless power supply device according to any one of claims 1 to 8, characterized by, The wireless power supply device includes a first power distribution network and a second power distribution network; the antenna array includes multiple radiating devices, each radiating device including a first radiator and a second radiator, the polarization directions of the first radiator and the second radiator being orthogonal. The first power divider network is connected to the first radiator, and the second power divider network is connected to the second radiator.

10. The wireless power supply device according to any one of claims 1 to 8, wherein The antenna array further includes multiple subarrays, each of which includes multiple radiators; the wireless power supply device includes multiple power divider networks; each power divider network is electrically connected to at least one subarray.

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