KR20130112233A - Multi feeding coil antenna capable of frequency tuning and apparatus for wireless power transmission using the same - Google Patents

Multi feeding coil antenna capable of frequency tuning and apparatus for wireless power transmission using the same Download PDF

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Publication number
KR20130112233A
KR20130112233A KR1020120034462A KR20120034462A KR20130112233A KR 20130112233 A KR20130112233 A KR 20130112233A KR 1020120034462 A KR1020120034462 A KR 1020120034462A KR 20120034462 A KR20120034462 A KR 20120034462A KR 20130112233 A KR20130112233 A KR 20130112233A
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KR
South Korea
Prior art keywords
wireless power
coil unit
frequency
power signal
power transmission
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Application number
KR1020120034462A
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Korean (ko)
Inventor
박진석
박래혁
박운규
이지형
조용찬
Original Assignee
엘에스전선 주식회사
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Priority to KR1020120034462A priority Critical patent/KR20130112233A/en
Publication of KR20130112233A publication Critical patent/KR20130112233A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
    • H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
    • H01Q11/08—Helical antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material

Abstract

PURPOSE: A multi power feed coil antenna capable of frequency tuning and a wireless power transmission device are provided to implement real-time tuning by using a magnetic resonance method. CONSTITUTION: A resonance coil unit (111) transmits a wireless power signal to the outside. When the wireless power signal is transmitted to the outside, a magnetic resonance method is used. One or more power feed coil units (121a,121b) are arranged around the resonance coil unit. The power feed coil units induce the wireless power signal. The power feed coil units vary the resonance frequency of the wireless power signal.

Description

Multi-feeding coil antenna capable of frequency tuning and Apparatus for wireless power transmission using the same}

The present invention relates to a multi-feed coil antenna capable of frequency tuning and a wireless power transmission apparatus using the same, and more particularly, to a multi-feed coil antenna capable of tuning a resonant frequency through multi-feeding, and a same It relates to a wireless power transmission device used.

Portable electronic devices such as mobile communication terminals, PDAs, PMPs, laptops, and the like, are commonly used as rechargeable batteries (batteries) that can be recharged with a driving power source to increase user convenience. By using such a battery as a driving power source, the user can be free from a wired environment for power supply, which makes the product more convenient to use.

The battery stores energy by charging with an external power source. In order to charge such a battery, a separate wired charging device that supplies household commercial power with the available rated power required for the battery is mainly used.

In the wired charging method, a method in which a terminal of a charging device and a terminal of a battery are electrically connected by physically contacting each other is mainly used.

However, in the above-described method, since the electrical coupling is made in a manner in which the terminals are physically coupled to each other, physical wear may occur and connection reliability may be deteriorated. There is a problem that the contact state easily becomes poor. In addition, in an environment with high moisture and humidity, problems such as an electric short-circuit accident or a loss of charged energy may occur.

In order to solve the problem of the contact charging method is disclosed a contactless charging system in which the terminal of the charging device and the battery is physically contactless, the contactless charging is known as the magnetic flux of the magnetic field in the primary coil In this case, the charging method uses a phenomenon in which power is induced to the secondary coil by a magnetic field that changes with time in an adjacent secondary coil.

Conventional contactless charging method has a wireless pad with a built-in primary coil for induction electromotive force, by a method of seating a portable electronic device equipped with a secondary coil means corresponding to the primary coil on the wireless pad Was implemented.

However, the above-described method has a coil structure for generating induced electromotive force, the transmitting side and the receiving side of the power should be adjacent to a short distance of a few mm, and the direction between the transmitting side and the receiving side exists and is aligned. As a result, the efficiency of power transmission changes drastically, and heat generation is disadvantageous.

Recently, the wireless power by the magnetic resonance method that can transfer the power in the form of magnetic field energy by concentrating the energy at a specific resonance frequency in a more advanced way that can send a relatively large power up to several meters compared to the conventional contactless charging method Transmission systems have been proposed. However, in the magnetic resonance method, since high resonance characteristics are required, it is difficult to apply wireless power transmission to a plurality of wireless power receivers. That is, when the resonant frequency is equally applied between the wireless power transmitter and the wireless power receiver, the wireless power can be properly transmitted. However, when a plurality of wireless power receivers are in close proximity to the wireless power transmitter, the resonant frequency is shifted. There is a problem that the wireless power transmission efficiency is lowered due to the fluctuation of the resonance frequency. This problem may also be caused by a change in distance between the wireless power transmitter and the wireless power receiver.

The present invention has been made to solve the problems of the prior art as described above, by configuring an antenna that is responsible for the transmission of wireless power in a multi-feeding method by the magnetic resonance method, it is possible to tune the resonance frequency through the multi-feeding An object of the present invention is to provide a multi-feed coil antenna capable of enabling frequency tuning and a wireless power transmission apparatus using the same.

According to an aspect of the present invention, there is provided a frequency-tunable multi-feed coil antenna including: a resonance coil unit configured to transmit a wireless power signal to the outside by a magnetic resonance method; And at least one feed coil unit disposed around the resonant coil unit to induce the wireless power signal by magnetic induction to the resonant coil unit, wherein the at least one feed coil unit feeds any one selected from among them. The resonant frequency of the wireless power signal is varied according to the selected feed coil unit.

Preferably, the at least one feed coil unit is arranged such that each has a different distance from the resonance coil unit.

Preferably, the at least one feed coil unit has a different size from each other.

Preferably, the at least one feed coil portion is larger or smaller than the resonant coil portion.

Preferably, the at least one feed coil unit is disposed outside or outside the resonance coil unit.

Preferably, the at least one feed coil unit may have a different size from each other, and may be arranged to have a different separation distance from the resonant coil unit.

Preferably, the resonant coil part is formed in a spiral shape having a predetermined diameter on a plane or in a helical shape having a predetermined height.

Preferably, the resonant coil portion is formed in a circular, elliptical, square, hexagonal or octagonal form.

According to another aspect of the present invention, a wireless power transmitter according to another aspect of the present invention is a wireless power transmitter capable of wirelessly transmitting power, and includes a power transmission antenna that transmits a wireless power signal to the outside in a magnetic resonance method. ; And a wireless power transmission station generating a wireless power signal when supplying commercial power, and supplying the generated wireless power signal to the power transmission antenna, wherein the power transmission antenna comprises a wireless power signal in a magnetic resonance method. And a resonant coil unit for transmitting to the outside, and at least one feed coil unit disposed around the resonant coil unit to induce the wireless power signal by magnetic induction. The power supply coil unit may be connected to a power supply connected to any one selected from among them, and the resonance frequency of the wireless power signal may vary according to the selected power supply coil unit.

Preferably, at least one feed coil unit of the power transmission antenna is arranged such that each has a different distance from the resonance coil unit.

Preferably, at least one feed coil unit of the power transmission antenna has a different size from each other.

Preferably, the at least one feed coil portion is larger or smaller than the resonant coil portion.

Preferably, the at least one feed coil unit is disposed outside or outside the resonance coil unit.

Preferably, at least one feed coil unit of the power transmission antenna may have a different size from each other, and may be arranged to have a different separation distance from the resonant coil unit.

Preferably, the resonant coil part of the power transmission antenna is formed in a spiral shape having a predetermined diameter on a plane or in a helical shape having a predetermined height.

Preferably, the resonant coil portion is formed in a circular, elliptical, square, hexagonal or octagonal form.

Preferably, the wireless power transmission station, a power supply unit for receiving the AC power of the commercial power source is converted into a direct current, a wireless power signal generator for generating a wireless power signal by receiving power from the power supply; A wireless power signal frequency adjuster configured to selectively feed at least one feed coil unit of the power transmission antenna to adjust a resonant frequency of the wireless power signal generated from the wireless power signal generator, and magnetic resonance of the wireless power signal A wireless power signal frequency detector for detecting and outputting a resonant frequency of a wireless power signal in a wireless power receiver, and a wireless power signal corresponding to the resonant frequency detected by the wireless power signal frequency detector. The wireless power signal frequency adjusting unit The control is made including a control unit.

According to the present invention, by configuring the structure of the coil antenna in a multi-feed method, it is possible to provide a coil antenna that can enable the tuning of the resonance frequency through the multi-feed. As a result, the resonance frequency of the coil antenna may be tuned in real time in response to the variation of the resonance frequency in the wireless power transmission process using the magnetic resonance method, thereby improving the wireless power transmission efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and, together with the description, And shall not be interpreted.
1 is a view schematically showing the configuration of a multi-feed coil antenna capable of frequency tuning according to a first embodiment of the present invention.
2 is a diagram schematically showing the configuration of a multi-feed coil antenna capable of frequency tuning according to a second embodiment of the present invention.
3 is a diagram illustrating a configuration of a wireless power transmission apparatus to which a multi-feed coil antenna capable of frequency tuning according to the present invention is applied.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

1 is a view schematically showing the configuration of a multi-feed coil antenna capable of frequency tuning according to a first embodiment of the present invention.

Referring to FIG. 1, the multi-feed coil antenna 101 capable of frequency tuning according to the first embodiment of the present invention is a medium for transmitting a wireless power signal having a specific resonance frequency to the outside by a magnetic resonance method. A resonant coil unit 111 for transmitting a wireless power signal to the outside by a magnetic resonance method, and is disposed around the resonant coil unit 111 to induce the wireless power signal by magnetic induction to the resonant coil unit 111. At least one feed coil unit 121a, 121b is configured to include.

The resonant coil unit 111 is a coil antenna designed to operate at a specific resonance frequency by being formed in a spiral shape having a predetermined diameter on a virtual plane or in a helical shape having a predetermined height. The coil antenna may have a circular, elliptical, square, hexagonal or octagonal shape. However, the present invention is not limited by the form of the resonant coil portion.

The power feeding coil parts 121a and 121b are configured with at least one, and the power feeding coil parts 121a and 121b are provided with different feed lines to operate individually.

In the first embodiment of the present invention, the power supply coil units 121a and 121b are arranged to have different distances from each other with the resonance coil unit 111, and any one selected from them is connected to the power supply, and thus connected The resonance frequency of the wireless power signal is varied according to the separation distance between the power supply coil parts 121a and 121b and the resonant coil part 111.

That is, the power supply coil parts 121a and 121b have the power supply coil part 121b located relatively far from the power supply coil part 121a positioned relatively close to the resonant coil part 111. When the wireless power signal is induced by low magnetic induction, the wireless power signal can be induced into a wireless power signal having a different resonance frequency. The resonant frequency is shifted according to the separation distance between the resonant coil unit 111 and the power feeding coil units 121a and 121b. The variation of the resonant frequency according to each of the feeding coil units 121a and 121b may be performed in advance. This can be determined by simulation.

2 is a diagram schematically showing the configuration of a multi-feed coil antenna capable of frequency tuning according to a second embodiment of the present invention.

Referring to FIG. 2, the multi-feed coil antenna 102 capable of frequency tuning according to the second embodiment of the present invention is a medium for transmitting a wireless power signal having a specific resonance frequency to the outside by a magnetic resonance method. A resonant coil unit 112 for transmitting a wireless power signal to the outside by a magnetic resonance method, and is disposed around the resonant coil unit 112 to induce the wireless power signal by magnetic induction to the resonant coil unit 112. It is configured to include at least one feed coil unit (122a, 122b).

The resonant coil unit 112 is a coil antenna designed to operate at a specific resonance frequency by being formed in a spiral shape having a predetermined diameter on a virtual plane or in a helical shape having a predetermined height. The coil antenna may have a circular, elliptical, square, hexagonal or octagonal shape. However, the present invention is not limited by the form of the resonant coil portion.

The power supply coil units 122a and 122b are configured with at least one, and the power supply coil units 122a and 122b are provided with different feed lines to operate individually.

In the second embodiment of the present invention, the power supply coil portions 122a and 122b each have a different size from each other, the size of which is larger or smaller than the resonant coil portion 112, and the resonance in the arrangement The coil unit 112 may be disposed outside or inside. The at least one feed coil unit 122a, 122b is fed to any one selected from among them, and the resonance frequency of the wireless power signal is varied according to the size of the feed coil unit 122a, 122b thus connected.

That is, the power supply coil parts 122a and 122b have a larger power supply coil part 122a that is relatively larger than the resonance coil part 112, and the power supply coil part 122b that has a smaller size is the resonance coil part 112. When the wireless power signal is induced by low magnetic induction, the wireless power signal can be induced into a wireless power signal having a different resonance frequency. The resonant frequency is shifted according to the relative sizes of the resonant coil unit 112 and the power feeding coil units 122a and 122b. This can be determined through.

Meanwhile, in the above-described first and second embodiments, the power supply coil unit has been described as being classified by size or separation distance. However, the present invention is not limited thereto, and the third embodiment is a combination of the two embodiments. Each of the power feeding coil units may have a different size from each other and may be arranged to have a different distance from the resonant coil unit.

As such, the multi-feed coil antennas 101 and 102 capable of tuning the frequency according to the present invention have been proposed to solve the problem of the coil antenna, which has been driven only at a fixed resonance frequency. By selectively feeding the feed coils 121a, 121b, 122a, and 122b having different relative sizes or separation distances, the resonance frequency may be varied. Through this, since the resonant frequency of the wireless power signal can be adjusted to the optimal resonant frequency, the transmission efficiency of the wireless power signal can be optimized.

Meanwhile, the multi-feed coil antennas 101 and 102 capable of frequency tuning according to the present invention may be applied to a wireless power transmitter for transmitting wireless power using a magnetic resonance method. Hereinafter, a configuration of such a wireless power transmitter will be described with reference to FIG. 3.

3 is a diagram illustrating a configuration of a wireless power transmission apparatus to which a multi-feed coil antenna capable of frequency tuning according to the present invention is applied.

Referring to Figure 3, the wireless power transmission apparatus according to the present invention, the power transmission antenna 101 for transmitting the wireless power signal to the outside in a magnetic resonance method, and generates a wireless power signal when the commercial power supply wirelessly generated It is configured to include a wireless power transmission station 200 for supplying a power signal to the power transmission antenna (101). Here, the power transmission antenna 101 is a multi-feed coil antenna 101 capable of frequency tuning according to the first embodiment described above is applied. However, the present invention is not limited thereto, and a multi-feed coil antenna capable of frequency tuning according to the second and third embodiments may be applied.

The power transmission antenna 101 is disposed in the resonant coil unit 111 for transmitting a wireless power signal to the outside by a magnetic resonance method, and is disposed around the resonant coil unit 111 to be magnetized to the resonant coil unit 111. It comprises at least one feed coil unit 121a, 121b for inducing the wireless power signal by induction. In this case, the at least one feed coil unit 121a, 121b is connected to a feed of any one selected from among them, and the resonant frequency of the wireless power signal is varied according to the selected feed coil unit 121a, 121b. Since the specific configuration of the power transmission antenna 101 is substantially the same as the multi-feed coil antenna according to the first embodiment described above, a detailed description thereof will be omitted.

The wireless power transmission station 200 includes a power supply 210, a wireless power signal generator 220, a wireless power signal frequency adjuster 230, a wireless power signal frequency detector 240, and each of these components. It is configured to include a control unit 250 for controlling the overall.

The power supply unit 210 receives the AC power of the commercial power source, converts it into direct current, and supplies it to the wireless power signal generator 220.

The wireless power signal generator 220 generates a wireless power signal having a resonant frequency of a specific band from the DC power supplied from the power supply 210 so that wireless power transmission can be performed by magnetic resonance.

The wireless power signal frequency adjusting unit 230 transmits the wireless power signal generated from the wireless power signal generator 220 to the power transmission antenna 101, and the resonance frequency of the wireless power signal transmitted. Wirelessly generated from the wireless power signal generator 220 by selectively feeding and connecting at least one feed coil unit 121a, 121b of the power transmitting antenna 101 to be transmitted to the outside in an optimal state. The resonance frequency of the power signal is adjusted.

The wireless power signal frequency detector 240 detects and outputs a resonance frequency of a wireless power signal in a wireless power receiver (not shown) that receives the wireless power signal in a magnetic resonance method.

The control unit 250 is a kind of microprocessor that controls the overall components of the wireless power transmission station 200, and in particular, wireless corresponding to the resonant frequency of the wireless power signal of the receiving side detected by the wireless power signal frequency detector 240. The wireless power signal frequency adjusting unit 230 is controlled to transmit a power signal.

As described above, the wireless power transmitter according to the present invention applies a multi-feed coil antenna 101 capable of frequency tuning to detect the resonance frequency of the wireless power signal in the wireless power receiver, which is a counterpart device receiving the wireless power signal. And selectively feeding at least one feed coil unit 121a, 121b of the power transmitting antenna 101 so that a corresponding wireless power signal can be transmitted, thereby matching the resonance frequency of the wireless power signal with an optimal resonance frequency. Because of this, the transmission efficiency of the wireless power signal can be optimized.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not to be limited to the details thereof and that various changes and modifications will be apparent to those skilled in the art. And various modifications and variations are possible within the scope of the appended claims.

101, 102: multi feed coil antenna
111, 112: resonant coil part
121a, 121b, 122a, 122b: feeding coil unit

Claims (17)

Resonant coil unit for transmitting the wireless power signal to the outside by the magnetic resonance method; And
At least one feed coil unit disposed around the resonance coil unit to induce the wireless power signal by magnetic induction to the resonance coil unit;
The at least one feed coil unit is connected to any one of the power feeding coil selected, and the resonant frequency of the wireless power signal is variable according to the selected power feeding coil unit, the frequency-tunable multi-feed coil antenna. The method of claim 1,
The at least one feed coil unit, the frequency-tunable multi-feed coil antenna, characterized in that each is arranged to have a different separation distance from the resonant coil portion. The method of claim 1,
The at least one feed coil unit, frequency-tunable multi-feed coil antenna, characterized in that each having a different size. The method of claim 3,
The at least one feed coil unit, multi-feed coil antenna capable of tuning the frequency, characterized in that smaller or smaller than the resonant coil portion. 5. The method of claim 4,
The at least one feed coil unit, frequency-tunable multi-feed coil antenna, characterized in that disposed on the outside or inside the resonant coil portion. The method of claim 3,
The at least one feed coil unit, each having a different size from each other, and the frequency-tunable multi-feed coil antenna, characterized in that arranged to have a different distance from the resonance coil portion. The method of claim 1,
The resonant coil unit is a multi-feed coil antenna capable of tuning the frequency, characterized in that formed in a spiral shape having a predetermined diameter on the plane or a helical shape having a predetermined height. The method of claim 7, wherein
The resonant coil portion is a multi-feed coil antenna capable of frequency tuning, characterized in that the shape is formed in a circular, oval, square, hexagonal or octagonal shape. In the wireless power transmission apparatus capable of transmitting power wirelessly,
A power transmission antenna for transmitting the wireless power signal to the outside in a magnetic resonance manner; And
And a wireless power transmission station generating a wireless power signal when supplying commercial power and supplying the generated wireless power signal to the antenna for power transmission.
The power transmission antenna,
A resonant coil unit for transmitting a wireless power signal to the outside by a magnetic resonance method, and at least one feed coil unit disposed around the resonant coil unit to induce the wireless power signal by magnetic induction to the resonant coil unit; Done by
The at least one power supply coil unit is connected to any one of the power supply is selected, the wireless power transmission device, characterized in that the resonant frequency of the wireless power signal is variable according to the selected power supply coil unit. 10. The method of claim 9,
At least one feed coil unit of the power transmission antenna, the wireless power transmission device, characterized in that each is arranged to have a different separation distance from the resonant coil unit. 10. The method of claim 9,
At least one feed coil unit of the power transmission antenna, characterized in that each has a different size from each other. 12. The method of claim 11,
The at least one feed coil unit, the wireless power transmission device, characterized in that larger or smaller than the resonant coil unit. The method of claim 12,
The at least one power supply coil unit, the wireless power transmission device, characterized in that disposed outside or inside the resonant coil unit. 12. The method of claim 11,
At least one feed coil unit of the power transmission antenna, the wireless power transmission apparatus, characterized in that each has a different size and are arranged to have a different separation distance from the resonant coil unit. 10. The method of claim 9,
The resonant coil unit of the power transmission antenna is a wireless power transmission device, characterized in that formed in a spiral shape having a predetermined diameter on the plane or a helical shape having a predetermined height. 16. The method of claim 15,
The resonant coil unit is a wireless power transmission device, characterized in that the shape is formed in a circular, oval, square, hexagonal or octagonal shape. 10. The method of claim 9,
The wireless power transmission station,
A power supply unit which receives an AC power of the commercial power and converts the DC power into a direct current;
A wireless power signal generation unit receiving power from the power supply unit to generate a wireless power signal;
A wireless power signal frequency adjusting unit configured to selectively feed at least one feed coil unit of the power transmission antenna to adjust a resonant frequency of the wireless power signal generated from the wireless power signal generator;
A wireless power signal frequency detector for detecting and outputting a resonance frequency of the wireless power signal in the wireless power receiver for receiving the wireless power signal in a magnetic resonance method;
And a controller configured to control the wireless power signal frequency adjuster so that the wireless power signal corresponding to the resonance frequency detected by the wireless power signal frequency detector is transmitted.
KR1020120034462A 2012-04-03 2012-04-03 Multi feeding coil antenna capable of frequency tuning and apparatus for wireless power transmission using the same KR20130112233A (en)

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WO2015064815A1 (en) * 2013-10-31 2015-05-07 주식회사 한림포스텍 Hybrid wireless power transmission system and method therefor
US10476159B2 (en) 2015-11-30 2019-11-12 Electronics And Telecommunications Research Institute Coaxial resonance coil having toroidal shape for wireless power transmission
US10523258B2 (en) 2017-03-06 2019-12-31 Samsung Electronics Co., Ltd. Communication device to perform wireless communication and wireless power transfer, and electrode device to transmit and receive electrical signal from target
WO2022014969A1 (en) * 2020-07-16 2022-01-20 삼성전자 주식회사 Multi-coil antenna, electronic device, and method for connecting coil of multi-coil antenna in electronic device
US11804874B2 (en) 2021-05-03 2023-10-31 Electronics And Telecommunications Research Institute Method and apparatus for magnetic field communication

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015064815A1 (en) * 2013-10-31 2015-05-07 주식회사 한림포스텍 Hybrid wireless power transmission system and method therefor
US10014725B2 (en) 2013-10-31 2018-07-03 Ge Hybrid Technologies, Llc Hybrid wireless power transmitting system and method therefor
US10778037B2 (en) 2013-10-31 2020-09-15 Ge Hybrid Technologies, Llc Hybrid wireless power transmitting system and method therefor
US11038378B2 (en) 2013-10-31 2021-06-15 Ge Hybrid Technologies, Llc Hybrid wireless power transmitting system and method therefor
US11362544B2 (en) 2013-10-31 2022-06-14 Ge Hybrid Technologies, Llc Hybrid wireless power transmitting system and method therefor
US11936202B2 (en) 2013-10-31 2024-03-19 Ge Hybrid Technologies, Llc Hybrid wireless power transmitting system and method therefor
US10476159B2 (en) 2015-11-30 2019-11-12 Electronics And Telecommunications Research Institute Coaxial resonance coil having toroidal shape for wireless power transmission
US10523258B2 (en) 2017-03-06 2019-12-31 Samsung Electronics Co., Ltd. Communication device to perform wireless communication and wireless power transfer, and electrode device to transmit and receive electrical signal from target
US10862525B2 (en) 2017-03-06 2020-12-08 Samsung Electronics Co., Ltd. Communication device to perform wireless communication and wireless power transfer, and electrode device to transmit and receive electrical signal from target
WO2022014969A1 (en) * 2020-07-16 2022-01-20 삼성전자 주식회사 Multi-coil antenna, electronic device, and method for connecting coil of multi-coil antenna in electronic device
US11804874B2 (en) 2021-05-03 2023-10-31 Electronics And Telecommunications Research Institute Method and apparatus for magnetic field communication

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