KR102571735B1 - mmWave wireless power transmission device using virtual data link channel - Google Patents

Abstract

Disclosed is an apparatus and method for transmitting ultra-high frequency wireless power using a virtual data link channel. The wireless power transmission device of the present invention includes a plurality of transmitters that individually generate signals of a very high frequency (mmWave) band, and is connected to an RF chain and a plurality of transmitters that adjust the phase and amplitude of signals generated from the plurality of transmitters, , a virtual data link unit including a plurality of virtual data link channels for transmitting data to a preset receiver, a switch connected to an RF chain, and generating a beam pattern of a signal adjusted through a plurality of switches having a matrix structure. A Rotman lens connected to a matrix and a switch matrix and beamforming a signal generated according to a predetermined transmission path, and a Rotman lens connected to a Rotman lens and radiating beamformed signals through a plurality of antennas to transmit data to a receiving device and a control unit for controlling at least one of a virtual data link channel, a signal phase, an amplitude, a beam pattern, and a transmission path so that data included in the signal is transmitted.

Description

Ultra high frequency wireless power transmission device using virtual data link channel {mmWave wireless power transmission device using virtual data link channel}

The present invention relates to a wireless power transmission technology, and more particularly, to an ultra-high frequency wireless power transmission device using a virtual data link channel for controlling a large-scale antenna array using a virtual data link channel in a mmWave environment.

Ultra-high frequency beamforming has a relatively narrow radiation angle because it can form a beam by integrating more antennas per unit area than conventional beamforming in the Sub6 GHz band. This has the advantage of effectively delivering energy to a selected point with high transmission efficiency, but has the problem of increasing cost by using a very large number of antennas to obtain high concentration.

For example, in the case of a conventional ultra-high frequency beamforming method in which independent active phase control is performed in individual antenna units, there is a problem of increasing the price of a transmitter due to a problem of securing a plurality of RF chains. To improve this, there is a hybrid beamforming method that includes both digital beamforming and analog beamforming, but this method also requires a step attenuator and a phase shifter to control the phase and amplitude of each antenna. It is becoming.

On the other hand, the Rotman lens is designed to change the phase transmitted to individual antennas according to the input port by adjusting the transmission path transmitted through the metal strip pad. beams can be formed. However, it has a disadvantage that the number of beams is limited according to the number of ports, and since it provides only a fixed beam shape for long-distance beamforming used in existing radar, etc. It is difficult to use effectively in the target wireless power transmission field.

Korean Patent Publication No. 10-2012-0065652 (2012.06.21.)

An object of the present invention is to provide an ultra-high frequency wireless power transmission device using a virtual data link channel for transmitting data to a receiving device desired by a user and obtaining data of a receiving device desired by the user.

Another technical problem to be achieved by the present invention is to provide an ultra-high frequency wireless power transmission device using a virtual data link channel that minimizes interference between different virtual data link channels generated while simultaneously transmitting data.

In order to achieve the above object, an ultra-high frequency wireless power transmission device using a Rotman lens according to the present invention includes a plurality of transmitters individually generating signals of a mmWave band, and the phase of the signal generated from the plurality of transmitters An RF chain for adjusting amplitude and a virtual data link unit connected to the plurality of transmitters and including a plurality of virtual data link channels for transmitting data to a preset receiver, connected to the RF chain, in a matrix structure A switch matrix for generating a beam pattern of the adjusted signal through a plurality of switches formed, a Rotman lens connected to the switch matrix and beamforming the generated signal according to a predetermined transmission path, and a Rotman lens connected to the Rotman lens and an antenna unit for transmitting data to the receiving device by radiating the beamformed signal through a plurality of antennas, and a virtual data link channel to transmit data included in the signal, phase, amplitude and beam pattern of the signal, and transmission. and a control unit controlling at least one of the paths.

In addition, the Rottman lens is characterized in that the phase and amplitude of the signal are changed according to the transmission path, and the changed signal is transmitted to the antenna unit.

In addition, the control unit, when at least one virtual data link channel is selected from among a plurality of virtual data link channels and data for the selected virtual data link channel is transmitted, the selected virtual data link and non-selected virtual data link It is characterized in that a weight is assigned to reduce the interference of .

In addition, the control unit is characterized in that the weight is given so that the sum of the signal of the non-selected virtual data link channel and the noise transmitted in the direction of the receiving device is minimized.

Also, the receiving device is characterized in that it is an active receiving device or a passive receiving device.

The ultra-high frequency wireless power transmission device using the virtual data link channel of the present invention can transmit data to a receiving device desired by the user and obtain data from the receiving device desired by the user.

In addition, interference between different virtual data link channels generated while simultaneously transmitting data can be minimized through weighting.

1 is a diagram for explaining a wireless power transmission device according to an embodiment of the present invention.
2 is a diagram for explaining a wireless power transmission device having an analog structure according to an embodiment of the present invention.
3 is a diagram for explaining a wireless power transmission device of a digital structure according to an embodiment of the present invention.
4 is a diagram for explaining a process of transmitting wireless power in a wireless power transmission system according to an embodiment of the present invention.
5 is a diagram for explaining a beam focusing process in a wireless power transmission system according to an embodiment of the present invention.
6 is a diagram for explaining a process of estimating the location of a receiving device in a wireless power transmission system according to an embodiment of the present invention.
7 is a diagram for explaining a wireless power transmission device according to another embodiment of the present invention.
8 is a diagram for explaining a wireless power transmission method according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same components have the same numerals as much as possible even if they are displayed on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function is obvious to those skilled in the art or may obscure the gist of the present invention, the detailed description will be omitted.

1 is a diagram for explaining a wireless power transmission device according to an embodiment of the present invention, FIG. 2 is a diagram for explaining a wireless power transmission device having an analog structure according to an embodiment of the present invention, and FIG. 3 is a diagram for explaining the present invention. It is a diagram for explaining a wireless power transmission device that is a digital structure according to an embodiment of.

1 to 3, the wireless power transmitter 100 forms various beam patterns at low cost. The wireless power transmission device 100 concentrates and transmits a beam to a receiving device (not shown) located at various distances so that the receiving device can efficiently charge energy. Here, the receiving device is a device capable of wireless charging, and may include a smart phone, a tablet PC, a handheld PC, an Internet of Things (IoT) device, and the like. The wireless power transmission device 100 includes a transmitter 11, a receiver 13, an RF chain 20, a switch matrix 30, a Rotman lens 40, a single pole single through (SPST) switch 50, It includes an antenna unit 60, an N:P combiner 70, a single pole double through (SPDT) switch unit 80, and a control unit 90.

The transmission unit 11 individually generates signals in a mmWave band. To this end, the transmitter 11 may include a first transmitter 11a, a second transmitter 11b to a Pth transmitter 11c (where P is a natural number equal to or greater than 3). Here, each signal may have the same phase or a different phase, and may include energy.

The receiver 13 individually receives signals in the ultra-high frequency band received through the plurality of antennas 67a, 67b, and 67c, or individually receives coupled signals from the plurality of couplers 65a, 65b, and 65c. To this end, the receiver 13 may include a first receiver 13a, a second receiver 13b to a Pth receiver 13c. In addition, the receiver 13 includes a plurality of receivers 13a, 13b, and 13c, so that it can receive several signals at the same time.

The RF chain 20 includes at least one of a plurality of transmitters 11a, 11b, and 11c, a plurality of receivers 13a, 13b, and 13c, an amplifier, a filter, a mixer, an attenuator, and a detector. The RF chain 20 adjusts the phase and amplitude of signals generated from the plurality of transmitters 11a, 11b and 11c. For example, when receiving P signals from the plurality of transmitters 11a, 11b, and 11c, the RF chain 20 may output P signals by adjusting the phase and amplitude of each signal. In this case, the RF chain 20a includes a step attenuator 21 and a phase shifter 23 in the case of an analog structure. The RF chain 20a adjusts the phase and amplitude of individual paths through the step attenuator 21 and the phase shifter 23, but is limited in modulation of the data signal because the control speed is slower than that of the digital I/Q. If the RF chain 20b is a digital structure, it includes digital I/Q. The RF chain 20b controls the baseband digital I/Q signal to obtain a plurality of phase and attenuator coefficients. In detail, the RF chain 20b sets the baseband I/Q channel, mixes I with a reference phase carrier, mixes Q with a 90° phase carrier, and then mixes I and Q. combined values (Fig. 3 (a)). Through this, the RF chain 20b generates carrier waves having various phases and amplitudes according to the value of I/Q (FIG. 3(b)). That is, the RF chain 20b can control very detailed phase and amplitude, and modulates and inserts data signals according to the sampling rate performance of the digital-to-analog converter (DAC).

The switch matrix 30 is connected to the RF chain 20 and receives signals from the RF chain 20 through a total of P individual input ports. The switch matrix 30 outputs input P signals to M (M is a natural number) output ports. That is, the switch matrix 30 is a matrix composed of a plurality of switches connecting a plurality of inputs to a plurality of selected outputs. Here, the M output ports are connected to the same number of input ports of the Rottman lenses 40 . The switch matrix 30 is formed of a plurality of switch matrices (not shown), and generates a beam pattern combining adjusted signals using the switch matrix. Here, the switch matrix is formed of switches capable of path control in a matrix structure, and a primary signal array can be generated by using path control through on/off. The switch matrix 30 may form a plurality of switches in a predetermined matrix structure so that the number of cases for a beam pattern of a signal increases. For example, the switch matrix 30 may be formed in a two-dimensional matrix structure having the same size as a×a and a×b (a and b are natural numbers).

The Rotman lens 40 is connected to the switch matrix 30, and beamforming the beam pattern generated from the switch matrix 30 according to a predetermined transmission path, thereby providing a secondary signal array generated with various beam patterns. generate Here, the Rotman lens 40 has M input ports and N (N is a natural number) output ports. The Rotman lens 40 changes the phase and amplitude of a signal according to a transmission path and transmits the converted signal to a plurality of antennas. At this time, the signal is transformed from the i-th input of the Rotman lens 40 to the j-th antenna according to the transfer coefficient h _i,j reflecting the change in phase and amplitude, and has a total of N×M transfer coefficients. That is, the individual signals input to the i-th input port among the M input ports have a signal s _i having a phase and an amplitude, and finally the signal s _ant (j) applied from the j-th antenna is obtained by [Equation 1] and can be shown together.

In this way, the wireless power transmitter 100 can diversify the signals applied to each individual antenna, and as a result, generate a plurality of beam patterns exceeding the limited number. Here, the Rottman lens 40 may transmit signals to the RF chain 20 in the reverse order of a process for radiating signals when receiving signals instead of radiating signals.

The SPST switch unit 50 is formed in a structure in which a plurality of SPST switches 50a, 50b, and 50c are connected to the output port of the Rotman lens 40 and the input port of the antenna unit 60, respectively. Here, the SPST switch is a switch used in a circuit composed of an on contact and an unconnected state (off). That is, each of the SPST switches 50a, 50b, and 50c transfers the signal output from the output terminal of the Rottman lens 40 to the antenna unit 60 when the switch is closed, and outputs the signal output from the output terminal of the Rotman lens 40 when the switch is opened. A signal to be transmitted to the antenna unit 60 is not transmitted.

The antenna unit 60 is connected to the SPST switch unit 50, emits a beamformed signal, and receives a signal from a receiving device. The antenna unit 60 includes a plurality of RF amplifiers 61a, 61b, and 61c, a plurality of isolation units 63a, 63b, and 63c, a plurality of couplers 65a, 65b, and 65c, and a plurality of antennas 67a and 67b. , 67c), and each channel is connected in order of an RF amplifier, isolation, coupler, and antenna. That is, the antenna unit 60 transmits each signal output from the SPST switch unit 50 through the antenna after passing through the RF amplifier, isolation and coupler. Meanwhile, the antenna unit 60 may support monitoring of the radiated signal by coupling some of the energy of the radiated signal through the plurality of couplers 65a, 65b, and 65c. Here, the antenna unit 60 may transfer the signal to the SPST switch 50 in the reverse order of the process for radiating the signal when receiving the signal instead of radiating the signal.

The N:P coupling unit 70 transfers a signal received from at least one coupler among the plurality of couplers 65a, 65b, and 65c to a receiving circuit terminal (monitoring path) connected to the receiving unit 13. At this time, the N:P combining unit 70 may be changed according to the ratio of N to P to form a combiner. For example, when N is 256 and P is 16 in the N:P coupler 70, 16 16:1 couplers can be formed.

The SPDT switch unit 80 individually transfers each signal received from the RF chain 20 and the N:P combiner 70 to the plurality of receivers 13 through the plurality of SPDT switches 80a, 80b, and 80c. It is formed with a structure that Here, the SPDT switch is a switch used in a circuit composed of two ON contacts, and in the present invention, the two contacts are the RF chain 20 and the N:P coupling part 70. For example, when the SPDT switch unit 80 needs to transfer a signal received from the RF chain 20 to the receiver 13, the SPDT switch corresponding to the contact connected to the RF chain 20 is closed, and N:P coupling is performed. When a signal received from the unit 70 needs to be transferred to the receiver 13, an SPST switch corresponding to a contact connected to the N:P coupling unit 70 is closed. Here, the SPDT switch unit 80 may time-divide the signals by selectively switching each signal received from the RF chain 20 .

The control unit 90 performs overall control of the wireless power transmission device 100. That is, the control unit 90 includes the transmitter 11, the receiver 13, the RF chain 20, the switch matrix 30, the Rotman lens 40, the SPST switch unit 50, the antenna unit 60, N: At least one of the P coupling unit 70 and the SPDT switch unit 80 is controlled.

For example, the control unit 90 controls the RF chain 20 to change the phase and amplitude of the signal, and controls the on/off of switches included in the SPST switch unit 50 and the SPDT switch unit 80. Here, the control unit 90 can control the SPDT switch unit 80 to selectively control the time division of the signal.

The control unit 90 analyzes the signal received from the receiving device, recognizes and tracks the location of the receiving device, establishes a transmission strategy for energy transmission, and transmits energy to the corresponding receiving device according to the established transmission strategy. In detail, the control unit 90 checks the phase difference generated by the plurality of antennas 67a, 67b, and 67c using the pilot signal packet and received data included in the signal, and uses the checked phase difference to the receiving device. estimate the location of Here, the pilot signal packet includes a preamble for recognizing the phase and amplitude of a carrier wave in an external noise environment, a unique ID value of a receiving device, and a pilot tone. After recognizing the pilot signal packet through preamble detection, the control unit 90 detects the phase included in the received data through the pilot tone.

The controller 90 estimates individual phase values through time-division selection of individual antennas 67a, 67b, and 67c of the antenna unit 60. When the antenna unit 60 simultaneously receives a plurality of signals, the control unit 90 checks the difference in phase and amplitude by reducing the frequency of time division, and estimates the position of the receiving device using the identified difference.

Also, the control unit 90 controls the antenna unit 60 to monitor the radiated signal. Based on the signals coupled from the plurality of couplers 65a, 65b, and 65c, it may be monitored whether a signal radiated through at least one of the plurality of antennas is the same as the user's target result. Through this, the user can monitor whether wireless power transmission is being performed according to his/her own intention.

Meanwhile, the wireless power transmission device 100 may further include an input unit (not shown) and a storage unit (not shown), although not shown in the drawings. The input unit receives user input from the user. In this case, the user input may include information about a receiving device to which the user wants to transmit energy, or information such as energy transmission intensity and energy transmission time. The storage unit stores a program or algorithm for driving the wireless power transmission device 100. In addition, the storage unit stores user input input from the user, calculation results from the control unit 90, and the like. The storage unit is a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (eg SD or XD memory, etc.), RAM (Random Access Memory, RAM), SRAM (Static Random Access Memory), ROM (Read-Only Memory, ROM), EEPROM (Electrically Erasable Programmable Read-Only Memory), PROM (Programmable Read-Only Memory), magnetic memory, magnetic disk and optical disk It may include at least one storage medium.

4 is a diagram for explaining a process of transmitting wireless power in a wireless power transmission system according to an embodiment of the present invention, and FIG. 5 is a diagram for explaining a process of beam focusing in a wireless power transmission system according to an embodiment of the present invention. It is a drawing for

Referring to FIGS. 4 and 5, the wireless power transmission system is a system for wirelessly transmitting power between a wireless power transmission device 100 and a receiver 200, and a low cost is effectively minimized by minimizing a high-cost phase control circuit. enables energy transfer.

The wireless power transmitter 100 transmits signals of various phases transmitted through the RF chain 20 and the switch matrix 30 to M individual input ports of the Rotman lens 40, and the Rotman lens 40 After changing the phase and amplitude according to the transmission path using , the signal is radiated to the receiver 200 through N antennas 67 . Here, in order to design the wireless power transmitter 100 to have P power amplifiers smaller than the number of antennas 67, the number of power amplifiers can be reduced by placing them in front of the switch matrix 30. In particular, the wireless power transmission device 100 solves the problem of radiating signals based on a long distance because it is impossible to modify the beam shape according to the distance with a conventional fixed phase. By adjusting the beam shape of the signal to focus the signal, the receiving device The energy charging efficiency may be increased by focusing the signal to the first device 210 in step 200 . For example, the wireless power transmission device 100 may focus the power signal by adjusting the phases of individual antennas 67 so that signals of the same phase may reach the antenna of the first device 210. Here, the receiving device 200 may include a plurality of devices 210, 220, and 230, and each receiving device may include a smart phone, a tablet PC, a handheld PC, an IoT device, etc. as a device capable of wireless charging. can

6 is a diagram for explaining a process of estimating the location of a receiving device in a wireless power transmission system according to an embodiment of the present invention.

Referring to FIG. 6, the wireless power transmission system estimates the location of the receiving device 200 through communication between the wireless power transmitting device 100 and the receiving device 200 so that wireless power transmission can be effectively performed.

The wireless power transmitter 100 estimates the phase difference generated from the plurality of antennas 67a, 67b, and 67c using the pilot signal, and based on this, estimates a signal suitable for each antenna for effective energy transmission. Here, the pilot signal packet is composed of a preamble, a unique ID value of a receiving device, and a pilot tone so that the phase and amplitude of a carrier wave can be effectively recognized in an external noise environment. In addition, the data received together with the pilot signal is recognized as a pilot signal packet through a preamble detector, and then the phase is sensed using a pilot tone.

Meanwhile, the wireless power transmitter 100 may estimate individual phase values through time-division selection of the plurality of antennas 67a, 67b, and 67c. In addition, when the wireless power transmitter 100 simultaneously receives a plurality of signals using a plurality of reception paths, it is possible to check the received phase and amplitude difference by reducing the frequency of time division.

7 is a diagram for explaining a wireless power transmission device according to another embodiment of the present invention.

1 and 7, the wireless power transmission device 300 is utilized not only for energy but also for data transmission. To this end, the wireless power transmitter 300 further includes a virtual data link unit 350 prior to the transmitter 11 and the RF chain 20 of the wireless power transmitter 100 of FIG. 1 . In the following description of the wireless power transmitter 300, a description of a configuration overlapping with the wireless power transmitter 100 will be omitted.

The virtual data link unit 350 includes a plurality of virtual data link channels 350a, 350b, and 350c. The virtual data link channel does not transmit data by physically selecting a channel of a single lotman lens 40, but inversely calculates the data signal so that the data signal can be effectively transmitted to a specific receiver through a plurality of antennas, and transmits the data stream to the input channels. It is a link channel that encodes by dividing . Through this, the virtual data link unit 350 supports transmission of a data signal to a receiving device desired by the user. The virtual data link unit 350 can also be used when receiving signals. For example, the virtual data link unit 350 may obtain data of a receiver desired by the user by applying the same weight during transmission to signals simultaneously collected by the control unit 90 from a plurality of antennas. If data is transmitted at the same time here, interference with other virtual data link channels may occur, and such interference may affect data transmission/reception. is set by In addition, the control unit 90 can express the sum of the signal and noise transmitted to the selected receiving device of the signal of another virtual data link channel as SINR (Signal to Interference & Noise Ratio), and sets a weight value so that the SINR can be minimized. can be set

A signal through the virtual data link channel may have a packet structure of general wireless communication. For example, a sync is located at the beginning of a packet, and then configuration parameters such as source, destination, mode, etc., data payload, CRC, and the like are included. At this time, since space orthogonal is performed between the virtual data link channels, communication can be performed while various standards are simultaneously used.

That is, the virtual data link unit 350 may support communication with a passive receiver using backscatter as well as support communication with an active receiver.

8 is a diagram for explaining a wireless power transmission method according to an embodiment of the present invention.

Referring to FIGS. 1 and 8 , the wireless power transmission method can form various beam patterns at low cost by combining an active phase control circuit and a Rottman lens. Unlike the conventional method of transmitting energy to a receiver at a long distance or a predetermined distance, the wireless power transmission method concentrates and transmits a beam to a receiving device located at various distances so that the receiving device can efficiently charge energy.

In step S101, the wireless power transmission device 100 transmits a beacon signal. The wireless power transmitter 100 initially transmits energy and transmits a beacon signal of a predetermined frequency band so that receiving devices can confirm the existence of the wireless power transmitter.

In step S103, the wireless power transmission device 100 receives a beacon response signal. The wireless power transmitter 100 receives a beacon response signal, which is a response signal of the beacon signal, from the receiving devices that have received the beacon signal. Here, the beacon response signal includes a unique ID value and basic information of the receiving device.

In step S105, the wireless power transmission device 100 creates a list of receiving devices. The wireless power transmitter 100 creates a list of receiving devices existing around the wireless power transmitter 100 based on the received beacon response signal.

In step S107, the wireless power transmission device 100 selects a receiving device. The wireless power transmission device 100 selects a receiving device to wirelessly transmit energy. At this time, the wireless power transmission device 100 may select a receiving device according to a user input received from the user or automatically select a receiving device according to a preset criterion.

In step S109, the wireless power transmitter 100 transmits a pilot request signal. The wireless power transmission device 100 transmits a pilot request signal to the selected receiving device. Here, the pilot request signal may be a signal for phase estimation for each antenna of the wireless power transmitter 100.

In step S111, the wireless power transmitter 100 receives a pilot response signal. The wireless power transmission device 100 receives a pilot response signal from the selected receiving device. At this time, the pilot response signal is received through individual antennas of the wireless power transmitter 100.

In step S113, the wireless power transmission device 100 estimates the phase of the receiving device. The wireless power transmitter 100 estimates the position of the receiver by estimating the phase difference for each antenna based on the pilot response signal.

In step S115, the wireless power transmission device 100 checks whether the locations of all selected receiving devices are recognized. The wireless power transmitter 100 checks whether the locations of all selected receiving devices have been estimated. Here, the wireless power transmitter 100 performs step S117 when it is confirmed that the positions of all receiving devices are estimated, and branches to step S109 when it is not confirmed that the positions of all receiving devices are estimated.

In step S117, the wireless power transmission device 100 establishes an energy transmission strategy. The wireless power transmission device 100 determines whether to use energy in a time division transmission method or a simultaneous transmission method. At this time, the wireless power transmission device 100 determines a transmission method in consideration of the locations of all selected receiving devices, the energy charging state of the receiving devices, and the like, and establishes an energy transmission strategy according to the determined transmission method.

In step S119, the wireless power transmission device 100 transmits energy. The wireless power transmission device 100 transmits energy to the receiving device according to the established energy transmission strategy.

The method according to an embodiment of the present invention may be provided in the form of a computer readable medium suitable for storing computer program instructions and data. Such a computer-readable recording medium may include program commands, data files, data structures, etc. alone or in combination, and includes all types of recording devices storing data that can be read by a computer system. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and magnetic tapes, optical recording media such as CD-ROMs (Compact Disk Read Only Memory) and DVDs (Digital Video Disks). Optical media), magneto-optical media such as floptical disks, and program instructions such as ROM (Read Only Memory), RAM (RAM, Random Access Memory), flash memory, etc. and a hardware device specially configured to do so. In addition, the computer-readable recording medium is distributed in computer systems connected through a network, so that computer-readable codes can be stored and executed in a distributed manner. In addition, functional programs, codes, and code segments for implementing the present invention can be easily inferred by programmers in the technical field to which the present invention belongs.

Although the above has been described and illustrated in relation to preferred embodiments for illustrating the technical idea of the present invention, the present invention is not limited to the configuration and operation as shown and described in this way, without departing from the scope of the technical idea. It will be readily apparent to those skilled in the art that many changes and modifications can be made to the present invention. Accordingly, all such appropriate changes and modifications and equivalents should be regarded as falling within the scope of the present invention.

11: transmitter
13: receiver
20: RF chain
30: switch matrix
40: Rotman lens
50: SPST switch unit
60: antenna unit
70: N:P coupling part
80: SPDT switch unit
90: control unit
100, 300: wireless power transmission device
200: receiving device

Claims (5)

An RF chain comprising a plurality of transmitters individually generating mmWave signals and adjusting phases and amplitudes of signals generated from the plurality of transmitters;
a virtual data link unit connected to the plurality of transmitters and including a plurality of virtual data link channels for transmitting data to a predetermined receiver;
a switch matrix connected to the RF chain and generating a beam pattern of the adjusted signal through a plurality of switches having a matrix structure;
a Rotman lens connected to the switch matrix and beamforming the generated signal according to a predetermined transmission path;
an antenna unit connected to the Rotman lens and transmitting data to the receiver by radiating the beamformed signal through a plurality of antennas; and
A control unit for controlling at least one of a virtual data link channel, a signal phase, an amplitude, a beam pattern, and a transmission path so that data included in the signal is transmitted;
The control unit,
When at least one virtual data link channel among a plurality of virtual data link channels is selected and data for the selected virtual data link channel is transmitted, interference with the selected virtual data link and non-selected virtual data links is reduced. An ultra-high frequency wireless power transmission device using a virtual data link channel giving weights. According to claim 1,
The Rotman lens,
Ultra-high frequency wireless power transmission device using a virtual data link channel, characterized in that for changing the phase and amplitude of the signal according to the transmission path, and transmitting the changed signal to the antenna unit. delete According to claim 1,
The control unit,
The ultra-high frequency wireless power transmission device using a virtual data link channel, characterized in that the weight is given so that the signal of the non-selected virtual data link channel and the sum of noise transmitted in the direction of the receiving device are minimized. According to claim 1,
The receiving device,
Ultra-high frequency wireless power transmission device using a virtual data link channel, characterized in that the active receiving device or passive receiving device.