KR20140129927A - Apparatus and method for receiving wireless power - Google Patents

Apparatus and method for receiving wireless power Download PDF

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Publication number
KR20140129927A
KR20140129927A KR1020130048889A KR20130048889A KR20140129927A KR 20140129927 A KR20140129927 A KR 20140129927A KR 1020130048889 A KR1020130048889 A KR 1020130048889A KR 20130048889 A KR20130048889 A KR 20130048889A KR 20140129927 A KR20140129927 A KR 20140129927A
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KR
South Korea
Prior art keywords
conductor line
wireless power
path formed
magnetic field
line
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KR1020130048889A
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Korean (ko)
Inventor
서철헌
김형준
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인텔렉추얼디스커버리 주식회사
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Priority to KR1020130048889A priority Critical patent/KR20140129927A/en
Publication of KR20140129927A publication Critical patent/KR20140129927A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/02—Details
    • H01J37/04—Arrangements of electrodes and associated parts for generating or controlling the discharge, e.g. electron-optical arrangement, ion-optical arrangement
    • H01J37/10—Lenses
    • H01J37/14—Lenses magnetic
    • H01J37/141—Electromagnetic lenses
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/70—Circuit arrangements or systems for wireless supply or distribution of electric power involving the reduction of electric, magnetic or electromagnetic leakage fields

Abstract

The present invention relates to a wireless power receiving apparatus and a wireless power receiving method, and more particularly, to a wireless power receiving apparatus and a wireless power receiving method using a magnetic field lens that concentrates a magnetic field. According to an aspect of the present invention, there is provided a receiving apparatus comprising: a receiving antenna receiving a magnetic field of a specific frequency and receiving power; And a substrate disposed so as to face the reception antenna, and a magnetic field of the specific frequency radiated from the wireless power transmission device as the magnetic refractive index for the specific frequency is provided to be less than or equal to 0 and arranged in a predetermined pattern on the substrate, Each of the plurality of cells comprising: a first conductor line disposed on one side of the substrate; a second conductor line disposed on an opposite side of the substrate; and a second conductor line disposed on a second side of the substrate, And a connecting member that penetrates through the substrate and connects both ends of the first conductor line and the second conductor line, wherein the first conductor line and the second conductor line are located at the same point at both ends when viewed from above A wireless power receiver may be provided that is provided to form a twisted path.

Description

TECHNICAL FIELD [0001] The present invention relates to a wireless power receiving apparatus and a wireless power receiving method.

The present invention relates to a wireless power receiving apparatus and a wireless power receiving method, and more particularly, to a wireless power receiving apparatus and a wireless power receiving method using a magnetic field lens that concentrates a magnetic field.

Wireless power transmission technology is a technology that transmits power wirelessly between a power source and an electronic device. For example, in the wireless power transmission technology, a mobile terminal such as a smart phone or a tablet can be charged wirelessly only by placing the mobile terminal on a wireless charging pad. Thus, It can provide more excellent mobility, convenience, and safety. In addition to the wireless charging of mobile terminals, wireless power transmission technology has been attracting attention as a substitute for the existing wired power transmission environment in various fields of home appliances, electric vehicles, medical, leisure, and robots.

Wireless power transmission technology can be categorized as a technology using electromagnetic wave radiation and a technology using electromagnetic induction phenomenon. Techniques using electromagnetic wave radiation have limitations in efficiency due to the radiation loss consumed in the air. Recently, Many techniques using electromagnetic induction phenomena have been studied.

The wireless power transmission technology using the electromagnetic induction phenomenon is divided into an inductive coupling method and a resonant magnetic coupling method.

In the electromagnetic induction method, energy is transmitted by using a current induced in a receiving coil due to a magnetic field generated in a transmitting coil in accordance with electromagnetic coupling between a transmitting coil and a receiving coil. Although the electromagnetic induction type wireless power transmission technology has advantages of high transmission efficiency, it has a disadvantage in that the power transmission distance is limited to several millimeters, and the positional freedom is extremely low due to sensitivity to matching between coils.

Magnetic resonance method was proposed by Professor Marin Solarovich of MIT in 2005. It uses the phenomenon that the magnetic field is concentrated at both the transmission side and the reception side by the magnetic field applied at the resonance frequency between the transmission side coil and the reception side coil, Transmission. Accordingly, the magnetic resonance method is expected to be a wireless power transmission technology capable of realizing a cord-free energy by transmitting energy from a relatively long distance of several tens cm to several meters compared to an electromagnetic induction method.

However, even in the case of a magnetic resonance method having a long transmission distance as compared with the electromagnetic induction method, there is a problem that the transmission efficiency is drastically lowered as the transmission distance is further increased, so that the transmission distance is still limited.

SUMMARY OF THE INVENTION An object of the present invention is to provide a wireless power receiving apparatus and a wireless power receiving method which overcome the limitation of a transmission distance by using a magnetic field lens and have a sufficient transmission efficiency.

It is to be understood that the present invention is not limited to the above-described embodiments and that various changes and modifications may be made without departing from the spirit and scope of the present invention as defined by the following claims .

According to an aspect of the present invention, there is provided a receiving apparatus comprising: a receiving antenna receiving a magnetic field of a specific frequency and receiving power; And a substrate disposed so as to face the reception antenna, and a magnetic field of the specific frequency radiated from the wireless power transmission device as the magnetic refractive index for the specific frequency is provided to be less than or equal to 0 and arranged in a predetermined pattern on the substrate, Each of the plurality of cells comprising: a first conductor line disposed on one side of the substrate; a second conductor line disposed on an opposite side of the substrate; and a second conductor line disposed on a second side of the substrate, And a connecting member that penetrates through the substrate and connects both ends of the first conductor line and the second conductor line, wherein the first conductor line and the second conductor line are located at the same point at both ends when viewed from above A wireless power receiver may be provided that is provided to form a twisted path.

According to another aspect of the present invention, there is provided a receiving apparatus comprising: a receiving antenna receiving a magnetic field of a specific frequency and receiving power; A substrate disposed to face the reception antenna and a magnetic field of the specific frequency radiated from the wireless power transmission apparatus as the magnetic refractive index for the specific frequency is provided to be less than or equal to zero; A magnetic field lens including a plurality of cells focused by an antenna; A rectifier for rectifying the received power into a DC waveform; And a battery charged with the rectified power, wherein each of the plurality of cells includes: a first conductor line disposed on one side of the substrate; a second conductor line disposed on an opposite side of the substrate; And a connecting member connecting the first conductor line and the second conductor line through the first conductor line and the second conductor line, wherein the first conductor line and the second conductor line are located at the same point at both ends when viewed from above, May be provided.

It is to be understood that the solution of the problem of the present invention is not limited to the above-mentioned solution, and the solutions which are not mentioned can be clearly understood by those skilled in the art to which the present invention belongs There will be.

According to the present invention, transmission distance and transmission efficiency are improved in wireless power transmission.

The effects of the present invention are not limited to the above-mentioned effects, and the effects not mentioned can be clearly understood by those skilled in the art from the present specification and the accompanying drawings.

1 is a block diagram of a wireless power transmission system in accordance with an embodiment of the present invention.
2 is a block diagram of a wireless power transmission apparatus according to an embodiment of the present invention.
3 is a block diagram of a wireless power receiving apparatus according to an embodiment of the present invention.
FIG. 4 is a graph showing effective dielectric constants and effective permeability per frequency band of a meta-material structure according to an embodiment of the present invention.
5 and 6 are views of a magnetic field lens for focusing a magnetic field according to an embodiment of the present invention.
7 is a perspective view of a meta-material structure according to an embodiment of the present invention.
8 is a diagram of an equivalent circuit of a cell of a meta-material structure according to an embodiment of the present invention.
9 to 12 are views of a first embodiment of a cell according to an embodiment of the present invention.
9 is a plan view of a first form of a cell according to an embodiment of the invention.
10 is a rear view of a first embodiment of a cell according to an embodiment of the present invention.
11 is a cross-sectional view of the area A in Fig.
12 is a sectional view of the region B in Fig.
13 is a diagram of a second embodiment of a cell according to an embodiment of the present invention.
14 is a view of a third embodiment of a cell according to an embodiment of the present invention.
FIG. 15 is a view of a fourth embodiment of a cell according to the embodiment of the present invention. FIG.
16 is a view of a fifth embodiment of a cell according to the embodiment of the present invention.
17 is a view of a sixth embodiment of a cell according to the embodiment of the present invention.
Fig. 18 is a diagram relating to a seventh embodiment of a cell according to the embodiment of the present invention. Fig.
Fig. 19 is a diagram relating to an eighth embodiment of a cell according to the embodiment of the present invention.
20 is a flowchart of a wireless power receiving method according to an embodiment of the present invention.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to be illustrative of the present invention and not to limit the scope of the invention. Should be interpreted to include modifications or variations that do not depart from the spirit of the invention.

The terms and accompanying drawings used herein are for the purpose of facilitating the present invention and the shapes shown in the drawings are exaggerated for clarity of the present invention as necessary so that the present invention is not limited thereto And are not intended to be limited by the terms and drawings.

In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

According to an aspect of the present invention, there is provided a receiving apparatus comprising: a receiving antenna receiving a magnetic field of a specific frequency and receiving power; And a substrate disposed so as to face the reception antenna, and a magnetic field of the specific frequency radiated from the wireless power transmission device as the magnetic refractive index for the specific frequency is provided to be less than or equal to 0 and arranged in a predetermined pattern on the substrate, Each of the plurality of cells comprising: a first conductor line disposed on one side of the substrate; a second conductor line disposed on an opposite side of the substrate; and a second conductor line disposed on a second side of the substrate, And a connecting member that penetrates through the substrate and connects both ends of the first conductor line and the second conductor line, wherein the first conductor line and the second conductor line are located at the same point at both ends when viewed from above A wireless power receiver may be provided that is provided to form a twisted path.

The first conductor line and the second conductor line may be provided to form a path in the form of a sagittal, a twisted ribbon or an infinite symbol when viewed from above.

The first conductor line and the second conductor line may be provided so that a path formed by the first conductor line and a path formed by the second conductor line cross each other when viewed from above.

The first conductor line and the second conductor line may be formed so as to form a symmetrical path around a point where the path formed by the first conductor line and the path formed by the second conductor line intersect with each other Can be provided.

In addition, at least one gap acting as an air capacitor may be formed on the path formed by the first conductor line and the second conductor line.

The first conductor line and the second conductor line may be provided such that a path formed by the first conductor line and a path formed by the second conductor line cross each other when viewed from above, Wherein the second conductor line is provided to form a symmetrical path about a point where the path formed by the first conductor line intersects with the path formed by the second conductor line when viewed from above, May be provided at points that are symmetrical to each other about the intersecting point or may be provided at the intersecting point.

Each of the plurality of cells may further include at least one capacitor inserted in a path formed by the first conductor line and the second conductor line.

The first conductor line and the second conductor line may be provided such that a path formed by the first conductor line and a path formed by the second conductor line cross each other when viewed from above, The second conductor line is provided so as to form a symmetrical path about a point where the path formed by the first conductor line and the path formed by the second conductor line intersect with each other when viewed from above, May be provided at points that are symmetrical to each other about the intersecting point or may be provided at the intersecting point.

At least one of the first conductor line and the second conductor line may include a pattern line provided in a zigzag form on a path formed by the first conductor line and the second conductor line.

The first conductor line and the second conductor line may be provided such that a path formed by the first conductor line and a path formed by the second conductor line cross each other when viewed from above, The second conductor line is provided so as to form a symmetrical path about a point where the path formed by the first conductor line and the path formed by the second conductor line intersect with each other when viewed from above, The lines may be provided at points that are symmetrical to each other about the intersecting point or may be provided at the intersecting point.

According to another aspect of the present invention, there is provided a receiving apparatus comprising: a receiving antenna receiving a magnetic field of a specific frequency and receiving power; A substrate disposed to face the reception antenna and a magnetic field of the specific frequency radiated from the wireless power transmission apparatus as the magnetic refractive index for the specific frequency is provided to be less than or equal to zero; A magnetic field lens including a plurality of cells focused by an antenna; A rectifier for rectifying the received power into a DC waveform; And a battery charged with the rectified power, wherein each of the plurality of cells includes: a first conductor line disposed on one side of the substrate; a second conductor line disposed on an opposite side of the substrate; And a connecting member connecting the first conductor line and the second conductor line through the first conductor line and the second conductor line, wherein the first conductor line and the second conductor line are located at the same point at both ends when viewed from above, May be provided.

The first conductor line and the second conductor line may be provided to form a path in the form of a sagittal, a twisted ribbon or an infinite symbol when viewed from above.

The first conductor line and the second conductor line may be provided so that a path formed by the first conductor line and a path formed by the second conductor line cross each other when viewed from above.

The first conductor line and the second conductor line may be formed so as to form a symmetrical path around a point where the path formed by the first conductor line and the path formed by the second conductor line intersect with each other Can be provided.

In addition, at least one gap acting as an air capacitor may be formed on the path formed by the first conductor line and the second conductor line.

The first conductor line and the second conductor line may be provided such that a path formed by the first conductor line and a path formed by the second conductor line cross each other when viewed from above, Wherein the second conductor line is provided to form a symmetrical path about a point where the path formed by the first conductor line intersects with the path formed by the second conductor line when viewed from above, May be provided at points that are symmetrical to each other about the intersecting point or may be provided at the intersecting point.

Each of the plurality of cells may further include at least one capacitor inserted in a path formed by the first conductor line and the second conductor line.

The first conductor line and the second conductor line may be provided such that a path formed by the first conductor line and a path formed by the second conductor line cross each other when viewed from above, The second conductor line is provided so as to form a symmetrical path about a point where the path formed by the first conductor line and the path formed by the second conductor line intersect with each other when viewed from above, May be provided at points that are symmetrical to each other about the intersecting point or may be provided at the intersecting point.

At least one of the first conductor line and the second conductor line may include a pattern line provided in a zigzag form on a path formed by the first conductor line and the second conductor line.

The first conductor line and the second conductor line may be provided such that a path formed by the first conductor line and a path formed by the second conductor line cross each other when viewed from above, The second conductor line is provided so as to form a symmetrical path about a point where the path formed by the first conductor line and the path formed by the second conductor line intersect with each other when viewed from above, The lines may be provided at points that are symmetrical to each other about the intersecting point or may be provided at the intersecting point.


Hereinafter, a wireless power transmission system 1000 according to an embodiment of the present invention will be described.

The wireless power transmission system 1000 can transmit power wirelessly using a magnetic field.

1 is a block diagram of a wireless power transmission system 1000 in accordance with an embodiment of the present invention.

Referring to FIG. 1, a wireless power transmission system 1000 includes a wireless power transmission device 1100 and a wireless power reception device 1200. The wireless power transmission apparatus 1100 receives power from an external power source S and generates a magnetic field. The wireless power receiving apparatus 1200 generates a current using the generated magnetic field and receives power wirelessly.

Here, the wireless power transmission apparatus 1100 may be provided as a fixed type or a mobile type. Examples of the stationary type include a form embedded in a ceiling of a room, a wall surface or a table, an outdoor parking lot, a form installed in an implant type such as a bus stop or a subway station, or a form installed in a vehicle such as a vehicle or a train . The mobile wireless power transmission device 1100 may be implemented as part of another device, such as a portable device of movable weight or size, or a cover of a notebook computer.

Also, the wireless power receiving apparatus 1200 should be interpreted as a comprehensive concept including various electronic apparatuses having batteries and various home appliances that are powered by wireless power instead of power cables. Representative examples of the wireless power receiving apparatus 1200 include a portable terminal, a cellular phone, a smart phone, a personal digital assistant (PDA), a portable media player (PMP) Portable electronic devices, portable media players, wibro terminals, tablets, pablets, notebooks, digital cameras, navigation terminals, televisions, and electronic vehicles (EVs).

In the wireless power transmission system 1000, the wireless power receiving apparatus 1200 may be one or more. 1, a wireless power transmission apparatus 1100 and a wireless power reception apparatus 1200 transmit and receive power on a one-to-one basis. However, one wireless power transmission apparatus 1100 is connected to a plurality of wireless power reception apparatuses 1200 It is also possible to transmit electric power. In particular, in the case of performing wireless power transmission in a magnetic resonance mode, one wireless power transmission apparatus 1100 can transmit power to several wireless power receiving apparatuses 1200 simultaneously by applying a simultaneous transmission scheme or a time division transmission scheme .

Although not shown in FIG. 1, the wireless power transmission system 1000 may further include a relay for increasing a wireless power transmission distance. As the repeater, a passive type resonance loop implemented by an LC circuit may be used. Such a resonant loop can focus the magnetic field radiated into the atmosphere and increase the wireless power transmission distance. It is also possible to secure a wider range of wireless power transmission using several repeaters at the same time.

Hereinafter, a wireless power transmission apparatus 1100 according to an embodiment of the present invention will be described.

The wireless power transmission apparatus 1100 can transmit power wirelessly.

2 is a block diagram of a wireless power transmission apparatus 1100 according to an embodiment of the present invention.

2, the wireless power transmission apparatus 1100 includes an AC-DC converter 1110, a frequency oscillator 1120, a power amplifier 1130, an impedance matcher 1140, a transmission antenna 1150, 1160).

The AC-DC converter 1110 can convert AC power into DC power. The AC-DC converter 1110 receives AC power from an external power source S and converts the waveform of the inputted AC power into DC power and outputs it. The AC-DC converter 1110 can adjust the voltage value of the output DC power.

The frequency oscillator 1120 may convert the DC power to an AC power of a desired frequency. The frequency oscillator 1120 receives the DC power output from the AC-DC converter 1110, converts the input DC power into AC power having a specific frequency, and outputs the converted AC power. Here, the specific frequency may be a resonant frequency. At this time, the frequency oscillator 1120 can output an AC power having a resonance frequency.

The power amplifier 1130 can amplify the voltage or current of the power. The power amplifier 1130 receives the AC power of a specific frequency output from the frequency oscillator 1120 and amplifies the voltage or current of the AC power of the input specific frequency and outputs the amplified voltage.

The impedance matcher 1140 can perform impedance matching. The impedance matcher 1140 may include a capacitor, an inductor, and a switching element for switching the connection thereof. The matching of the impedances is performed by detecting a reflected wave of the radio power transmitted through the transmission antenna 1150 and switching the switching element based on the detected reflected wave to adjust the connection state of the capacitor or the inductor or to adjust the capacitance of the capacitor, . ≪ / RTI >

Transmit antenna 1150 can generate an electromagnetic field using AC power. The transmission antenna 1150 receives the AC power of a specific frequency output from the power amplifier 1130 and can generate a magnetic field of a specific frequency. The generated magnetic field is radiated, which is received by the wireless power receiving apparatus 1200 to generate a current. In other words, the transmission antenna 1150 transmits power wirelessly.

The magnetic field lens 1160 can focus a magnetic field of a certain frequency. The magnetic field lens 1160 may have a refraction index (zero refraction index) or a negative index of refraction (negative refraction index) as its refraction index for a magnetic field of a specific frequency. When the magnetic field passes through the magnetic field lens 1160 having a refractive index of '0' or a negative refractive index, an effect similar to the effect that the light passing through the optical lens is refracted occurs. That is, the magnetic field lens 1160 can focus the radially outgoing magnetic field in a desired direction.

With this effect, the magnetic field lens 1160 is disposed on the front surface of the transmission antenna 1150 to focus the magnetic field radiating from the transmission antenna 1150 in a direction perpendicular to the magnetic field lens 1160, As shown in FIG.

Therefore, when the magnetic field lens 1160 is used, the ratio of the unwanted emission to the atmosphere is reduced as compared with the case where the magnetic field emitted from the transmission antenna 1150 is absent from the magnetic field lens 1160, so that the radiation efficiency due to energy transfer increases. The transmission efficiency and transmission distance can be improved in the case of wireless power transmission using a magnetic field.

Meanwhile, the wireless power transmission apparatus 1100 may include a wireless power transmitter including the transmitting antenna 1150 and the magnetic field lens 1160 integrally. The wireless power transmitter can perform the function of emitting and focusing the magnetic field.

Hereinafter, a wireless power receiving apparatus 1200 according to an embodiment of the present invention will be described.

The wireless power receiving apparatus 1200 can receive power wirelessly.

3 is a block diagram of a wireless power receiving apparatus 1200 according to an embodiment of the present invention.

3, the wireless power receiving apparatus 1200 includes a magnetic field lens 1210, a receiving antenna 1220, an impedance matcher 1230, a rectifier 1240, a DC-DC converter 1250, and a battery 1260, . ≪ / RTI >

The magnetic field lens 1210 can focus a magnetic field of a specific frequency. The magnetic field lens 1210 may have a refractive index (zero refractive index) or a negative refractive index (negative refractive index) of 0 for a magnetic field of a specific frequency. When the magnetic field passes through the magnetic field lens 1210 having a refractive index of '0' or a negative refractive index, an effect similar to the effect that the light passing through the optical lens is refracted occurs. That is, the magnetic field lens 1210 can focus the incident magnetic field in a desired direction.

By using this effect, the magnetic field lens 1210 can be disposed on the front surface of the receiving antenna 1220, and the magnetic field radiated from the transmitting antenna 1150 can be focused on the receiving antenna 1220.

The receive antenna 1220 may receive the wireless power transmitted from the wireless power transmission apparatus 1100. [ It is possible to receive power using the magnetic field concentrated at the receiving antenna 1220 by the magnetic field lens 1210 at the transmitting antenna 1150. [ Here, when the specific frequency is a resonance frequency, a magnetic resonance phenomenon occurs between the transmitting antenna 1150 and the receiving antenna 1220, so that power can be more efficiently transmitted.

The impedance matcher 1230 can adjust the impedance of the wireless power receiving apparatus 1200. The impedance matcher 1230 may be composed of a switching element that switches capacitors, inductors, and combinations thereof. The matching of the impedances can be performed by controlling the switching elements of the circuit constituting the impedance matcher 1230 based on the voltage value or the current value, the power value, the frequency value or the like of the received radio power.

Rectifier 1240 can rectify the received radio power and convert it from AC to DC. The rectifier 1240 can convert an alternating current into a direct current using a diode or a transistor, and smooth it using a capacitor and a resistor. As the rectifier 1240, a full-wave rectifier, a half-wave rectifier, a voltage multiplier, or the like implemented by a bridge circuit or the like may be used.

DC-DC converter 1250 can convert the rectified DC power voltage to a desired level and output it. When the voltage value of the DC power rectified by the rectifier 1240 is larger or smaller than the voltage value required for charging the battery or driving the electronic device, the DC-DC converter 1250 converts the voltage value of the rectified DC power Voltage.

The battery 1260 may store energy using power output from the DC-DC converter 1250. [ On the other hand, the battery 1260 is not necessarily included in the wireless power receiving apparatus 1200. For example, the battery may be provided in a detachable external configuration. For example, the wireless power receiving apparatus 1200 may include driving means for driving various operations of the electronic device instead of the battery 1260. [

Meanwhile, the wireless power receiving apparatus 1200 may include a wireless power receiver including the receiving antenna 1220 and the magnetic field lens 1210 integrally. The wireless power receiver can perform the function of focusing and receiving the radiated magnetic field.

Hereinafter, a process of wirelessly transmitting power in the wireless power transmission system 1000 according to an embodiment of the present invention will be described.

The wireless transmission of electric power can be performed using an electromagnetic induction method or a magnetic resonance method. At this time, it may be performed between the transmission antenna 1150 of the wireless power transmission apparatus 1100 and the reception antenna 1220 of the wireless power reception apparatus 1200.

When a magnetic resonance method is used, the transmitting antenna 1150 and the receiving antenna 1220 may be provided in the form of resonant antennas, respectively. The resonant antenna may have a resonant structure including a coil and a capacitor. At this time, the resonant frequency of the resonant antenna is determined by the inductance of the coil and the capacitance of the capacitor. Here, the coil may be in the form of a loop. Also, the core may be disposed inside the loop. The core may comprise a physical core such as a ferrite core or an air core.

The energy transmission between the transmission antenna 1150 and the reception antenna 1220 can be achieved through a resonance phenomenon of a magnetic field. The resonance phenomenon is a phenomenon in which, when one resonant antenna is located near another resonant antenna when a near-field corresponding to the resonant frequency is generated, both resonant antennas are coupled to each other, and high efficiency energy transfer occurs between the resonant antennas . When a magnetic field corresponding to a resonance frequency is generated between the resonant antenna of the transmitting antenna 1150 and the resonant antenna of the receiving antenna 1220, resonance phenomena in which the resonant antenna of the transmitting antenna 1150 and the resonant antenna of the receiving antenna 1220 resonate with each other The magnetic field is focused toward the receiving antenna 1220 at a higher efficiency than in the case where the magnetic field generated in the transmitting antenna 1150 is radiated to the free space in general. 1220 can be delivered with high efficiency.

The electromagnetic induction method can be implemented similarly to the magnetic resonance method, but the frequency of the magnetic field does not have to be the resonance frequency at this time. Instead, in the electromagnetic induction method, the matching between the loops constituting the receiving antenna 1220 and the transmitting antenna 1150 is required and the intervals between the loops must be very close to each other.

Hereinafter, the magnetic field lenses 1160 and 1210 according to the embodiment of the present invention will be described.

As described above, when power transmission is performed wirelessly, since the magnetic field, which is a near field generated by the transmission antenna 1150, radially spreads, when the distance between the transmission antenna 1150 and the reception antenna 1220 becomes long, . The magnetic field lens 1160 can focus the magnetic field such that the magnetic field emitted from the transmitting antenna 1150 radiates in a desired direction instead of radially spreading. Likewise, the magnetic field lens 1210 can focus the magnetic field radiated by the transmitting antenna 1150 to be focused at the receiving antenna 1220.

The magnetic field lenses 1160 and 1210 may be implemented with a metamaterial structure 2000. Here, the meta-material structure 2000 may mean a structure provided to have a meta-material characteristic.

Metamaterials are artificial materials that are designed to have characteristics not found in the natural world. The meta-material can be produced by forming a specific pattern mainly using a material such as metal or plastic, and the meta-material is given a characteristic pattern by a specific pattern rather than the material. Typical examples of metamaterials are NIM (Negative Index Material) having negative values of both permittivity and permeability, and SNG (Single Neighbor) having negative value of permittivity and permeability. SRR (Split Ring Resonator) And the like.

A typical example of the properties of such a meta-material is '0' or a negative refractive index for an electromagnetic field. The refractive index (n) for the electromagnetic field has the following functional relationship with respect to the effective permittivity (eeff) and the effective permeability (ueff).

n = eeff x uEff

Therefore, when the effective permittivity or the effective permeability of the metamaterial is adjusted to '0', the metamaterial has a refractive index of '0'. Likewise, if either the effective permittivity of the metamaterial or the effective permeability is adjusted to have a negative value, the metamaterial can have a negative permeability.

Here, the effective permittivity eeff and the effective permeability ueff can be adjusted in size, shape, spacing, repetition number of patterns, inductance and capacitance of the specific pattern constituting the meta-material structure 2000.

Therefore, by adjusting the size, shape, spacing, repetition frequency, inductance and capacitance of a specific pattern constituting the meta material structure 2000 such that any one of the effective permittivity eeff and the effective permeability euff is '0' The structure 2000 can have a refractive index of '0'. Similarly, by adjusting the size, shape, spacing, number of repetitions, inductance or capacitance of a specific pattern constituting the meta material structure 2000 so that either the effective permittivity eeff or the effective permeability euff has a negative value, The material structure 2000 can have a negative refractive index.

Since the effective permittivity (eeff) or effective permeability (ueff) of the meta-material structure 2000 varies depending on frequency bands, even if the desired specific frequency has a value of '0' or a negative refractive index, It is important to note that

FIG. 4 is a graph showing the effective permittivity and the effective permeability per frequency band of the meta-material structure 2000 according to an embodiment of the present invention.

Referring to FIG. 4, the meta-material structure 2000 may have a value of effective permeability of '0' in a band of about 13.6 Mhz. Accordingly, the meta-material structure 2000 has a refractive index of '0' in the 13.6 Mhz band. Similarly, the meta-material structure 2000 can have a negative value of the effective permeability at about 13.4 MHz to 13.6 MHz band. Accordingly, the meta-material structure 2000 has a negative refractive index in the corresponding range.

When the magnetic field lenses 1160 and 1210 are implemented using the meta-material structure 2000 described above, the magnetic field radiated from the wireless power transmission apparatus 1160 can be focused toward the wireless power reception apparatus 1210.

5 and 6 are diagrams of magnetic field lenses 1160 and 1210 focusing a magnetic field according to an embodiment of the present invention. Here, FIG. 5 is a diagram for using magnetic field lenses 1160 and 1210 having a refractive index of '0', and FIG. 6 is a diagram for using magnetic field lenses 1160 and 1210 having a negative refractive index.

5, a magnetic field lens 1160 is disposed on a side where a transmitting antenna 1150 emits a magnetic field, and a magnetic field lens 1210 is disposed on a side where a receiving antenna 1220 receives a magnetic field. Transmit antenna 1150 emits a magnetic field of a certain frequency. Here, the magnetic field lenses 1160 and 1210 have a refractive index of '0' for a specific frequency. For example, the specific frequency may be 13.6 Mhz, and the magnetic field lenses 1160 and 1210 may have a refractive index of '0' by having an effective permeability of '0' in the corresponding frequency band. The magnetic field lens 1160 refracts the emitted magnetic field in the vertical direction. Instead of spreading the refracted magnetic field more radially, it is focused in the desired direction with straightness. The focused magnetic field is incident on the magnetic field lens 1210 and the magnetic field lens 1210 refracts it and focuses it on the receiving antenna 1220. [ Therefore, more magnetic field can be transmitted from the transmitting antenna 1150 to the receiving antenna 1220 than in the case where the magnetic field lenses 1160 and 1210 are absent.

5, a magnetic field lens 1160 is disposed on the side where the transmission antenna 1150 emits a magnetic field, and a magnetic field lens 1210 is provided on the side where the reception antenna 1220 receives the magnetic field, Respectively. Transmit antenna 1150 emits a magnetic field of a certain frequency. Here, the magnetic field lenses 1160 and 1210 have a negative refractive index with respect to a specific frequency. For example, the specific frequency may be from 13.4 MHz to 13.6 MHz, and the magnetic field lenses 1160 and 1210 may have negative refractive indices by having a positive effective permittivity and a negative effective permittivity in the corresponding frequency band. The magnetic field lens 1160 refracts the emitted magnetic field in the center direction. The refracted magnetic field is then focused to focus on a magnetic field lens 1210 that no longer radiates. The focused magnetic field is incident on the magnetic field lens 1210 and the magnetic field lens 1210 refracts it and focuses it on the receiving antenna 1220. [ Therefore, more magnetic field can be transmitted from the transmitting antenna 1150 to the receiving antenna 1220 than in the case where the magnetic field lenses 1160 and 1210 are absent.

The use of the magnetic field lenses 1160 and 1210 provided in the meta-material structure 2000 reduces the rate at which the magnetic field radiated from the wireless power transmission device 2100 is radiated into the undesired atmosphere, The radiation efficiency of the magnetic field transmitted from the wireless power receiving apparatus 2200 to the wireless power receiving apparatus 2200 increases, and as a result, the transmission efficiency and the transmission distance can be improved in the case of wireless power transmission using the magnetic field.

Here, the specific frequency of the magnetic field to be radiated by the transmitting antenna 1150 and the receiving antenna 1220 may be the resonant frequency of the wireless power transmission apparatus 1100 and the wireless power receiving apparatus 1210. At this time, a resonance phenomenon occurs between the transmitting antenna 1150 and the receiving antenna 1220, so that power can be transmitted wirelessly according to the magnetic resonance method.

Hereinafter, the meta-material structure 2000 implementing the magnetic field lenses 1160 and 1210 according to the embodiment of the present invention will be described.

As described above, the meta-material structure 2000 may have a refractive index of '0' or a negative refractive index with respect to an electromagnetic field.

7 is a perspective view of a meta-material structure 2000 according to an embodiment of the present invention.

Referring to FIG. 7, the meta-material structure 2000 may be realized by a substrate 2100 and a plurality of cells 2200 each having a refractive index of '0' or a negative refractive index for an electromagnetic field.

The substrate 2100 may be provided in a flat shape. The substrate 2100 may be provided such that one surface of the substrate 2100 and the opposite surface thereof are parallel to each other. The substrate 2100 may be made of a material that does not shield the magnetic field. For example, the substrate 2100 may be provided with CER-10 or similar materials.

The substrate 2100 is disposed so as to be spaced apart from the transmission antenna 1150 in the direction in which the magnetic field is radiated when the meta-material structure 2000 is used as the magnetic field lens 1160. [ Here, the separation distance may be in the range of several micrometers to centimeters. The substrate 2100 can also be arranged to face the loop of the coil that makes up the transmitting antenna 1150. That is, the substrate 2100 can be arranged such that the plane formed by the substrate 2100 and the plane formed by the loops of the coils are planes parallel to each other.

The substrate 2100 is disposed apart from the receiving antenna 1220 in the direction in which the magnetic field is received when the meta-material structure 2000 is used as the magnetic field lens 1210. Here, the separation distance may be in the range of several micrometers to centimeters. The substrate 2100 may also be arranged to face a loop of coils forming the receive antenna 1220. That is, the substrate 2100 can be arranged such that the plane formed by the substrate 2100 and the plane formed by the loops of the coils are planes parallel to each other.

A plurality of cells 2200 may be provided arranged on the substrate 2100. For example, a plurality of cells 2200 may be provided on the substrate 2100 in a total of 12 rows by 3 columns by 4 columns as shown in FIG. Of course, the number and arrangement of the plurality of cells 2200 are not necessarily limited to those shown in Fig. 7, and the number of the plurality of cells 2200 can be appropriately increased or decreased as needed, And can be changed accordingly.

Hereinafter, the cell 2200 according to the embodiment of the present invention will be described.

Each of the plurality of cells 2200 should be provided in a PLH (Purely Left-Handed) structure.

8 is a diagram of an equivalent circuit of a cell 2200 of a meta-material structure 2000 according to an embodiment of the present invention. 8 (A) is an equivalent circuit of a PRH (Purely Right-Handed) structure in which inductors are connected in series and capacitors are connected in parallel, and FIG. 8 (B) And is an equivalent circuit of a PLH structure in which capacitors are connected in series. In the case of the PRH circuit, since the beta value exists in the positive region, it can not have a negative refractive index. On the other hand, in the case of the PLH circuit, since the beta value exists in a negative region, it can have a negative refractive index. Therefore, the cell 2200 constituting the meta-material structure 2000 should be implemented in the form of an equivalent circuit having a series inductor and a parallel capacitor.

Hereinafter, the structure of the cell 2200 according to the embodiment of the present invention will be described. However, the structure of the cell 2200 is not limited to the embodiments described later.

FIG. 9 is a plan view of a first embodiment of a cell according to an embodiment of the present invention, and FIG. 10 is a cross-sectional view of a cell according to an embodiment of the present invention Fig. 11 is a cross-sectional view of the region A of Fig. 9, and Fig. 12 is a cross-sectional view of the region B of Fig.

The cell 2200 may be provided on the substrate 2100. The cell 2200 may be provided in a form attached to one surface of the substrate 2100 or an opposite surface thereof. Or the cell 2200 may be provided on the substrate 2100 by being patterned with embossed or engraved.

Each cell 2200 may include a first conductor line 2210, a second conductor line 2220, a connecting member 2230, and a capacitor 2240.

Referring to FIG. 9 or 10, a first conductor line 2210 may be provided on one surface of the substrate 2100. For example, the first conductor line 2210 may be provided in a form adhered on one side of the substrate 2100. Alternatively, the first conductor line 2210 may be provided on one surface of the substrate 2100 with a pattern embossed or engraved.

Referring again to FIG. 9 or 10, a second conductor line 2220 may be provided on the other side of the substrate 2100. The second conductor line 2220 may be provided to the substrate 2100 in a manner similar to the first conductor line 2210. For example, the second conductor line 2220 may be provided in a form adhered to the other surface of the substrate 2100. Or the second conductor line 2220 may be provided on the other surface of the substrate 2100 with a pattern embossed or engraved.

The first conductor line 2210 and the second conductor line 2220 may be arranged so that both ends of the first conductor line 2210 and the second conductor line 2220 are located at the same point when viewed from above. For example, the first conductor line 2210 and the second conductor line 2220 may be arranged so that both ends thereof are located in the A region of FIG. 9 and the B region of FIG. 9.

The connecting member 2230 may connect the first conductor line 2210 and the second conductor line 2220. 9 to 10, the connecting member 2230 may be disposed at a position where both ends of the first conductor line 2210 and both ends of the second conductor line 2220 meet when viewed from above. For example, the connecting member 2230 may be provided in each of the area A and the area B in FIG. 9, respectively. The connecting member 2230 penetrates the substrate 2100 at a point where both ends of the first conductor line 2210 and the second conductor line 2220 meet to form the second conductor line 2220 from the first conductor line 2210 Lt; / RTI > 11, the connecting member 2230a may connect one end of the first conductor line 2210 and one end of the second conductor line 2220 through the substrate 2100 in the region A . 12, the connecting member 2230b may connect the other end of the first conductor line 2210 and the other end of the second conductor line 2220 through the substrate 2100 in the region B, as shown in FIG. Accordingly, the first conductor line 2210 and the second conductor line 2220 can be electrically connected.

Here, the first conductor line 2210 and the second conductor line 2220 may be arranged along a path that forms a specific pattern when viewed from above. 9-10, the first conductor line 2210 and the second conductor line 2220 may be provided to form a twisted path when viewed from above. For example, the first conductor line 2210 and the second conductor line 2220 may be formed in a shape of a '8', a twisted ribbon, or an infinite ' May be provided.

9 and 10, the first conductor line 2210 is connected to the upper end 2211 of one of the parallel side line portions 2211 and 2212 and the side line portions 2211 and 2212 A first diagonal line portion 2213 connected to the other lower end 2212 and a second diagonal line portion 2213 extending from one of the lower ends 2211 of the both line portions 2211 and 2212 to the A region toward the other upper end 2212 And a third diagonal line portion 2215 extending from the upper end of the other one of the two side line portions 2212 toward the lower end of the one of the both line portions 2211 to the region B, . ≪ / RTI >

The second diagonal line portion 2214 extends from the A region and is connected to the lower end of one of the two side line portions 2211. One of the two side line portions 2211 has a first diagonal line portion The first diagonal line portion 2213 is connected to the lower end of the other one of the both line portions 2212 and the other both line portions 2212 are connected to the third diagonal line portion 2215 at the upper end thereof And the third diagonal line portion 2215 extends from the upper end of the other both-side line portion 2212 to the A region. Thus, the two line portions 2211 and 2212, the first diagonal line portion 2213, the second diagonal line portion 2214, and the third diagonal line portion 2215 extend from one end of the A region to the other end of the B region, Path < / RTI >

9 and 10, the second conductor line 2220 may extend from the A region toward the B region. 11, one end of the second conductor line 2220 is connected to one end of the first conductor line 2210 by the connecting member 2230a in the A region. The other end of the second conductor line 2220 is connected to the other end of the first conductor line 2210 by the connecting member 2230b in the region B as shown in FIG.

Accordingly, the first conductor line 2210 and the second conductor line 2220 are connected to each other as a whole, and a path of a '8' shape, a twisted ribbon shape, or an infinite symbol ('∞' As shown in FIG.

However, the shapes of the first conductor line 2210 and the second conductor line 2220 are not necessarily limited to those described above.

For example, the first conductor line 2210 may include only two side line portions 2211 and 2212 and the first diagonal line portion 2213 that are parallel to each other, and the second conductor line 2220 may include any one of the side line portions To the upper end of the other one (2212). Of course, in this case, the connecting member 2230 connects the first conductor line 2210 and the second conductor line 2220 at the lower end of either one of the both-side line portions 2211, The first conductor line 2210 and the second conductor line 2220 may be connected to each other. Also in this case, the first conductor line 2210 and the second conductor line 2220 are connected to each other as a whole when viewed from above, and may be formed in a shape of '8', a twisted ribbon or an infinite symbol ' ) ≪ / RTI >

For example, the first conductor line 2210 may include only one of the two line portions 2211 and the first diagonal line portion 2213, and the second conductor line 2220 may include only one of the two line portions 2211, And a diagonal line portion disposed at a position connected to a line disposed at the position of the other one 2212 and an upper end of the other one 2212 from the lower end of the one 2211 viewed from the top. Also in this case, the first conductor line 2210 and the second conductor line 2220 are connected to each other as a whole when viewed from above, and may be in the form of a '8', a twisted ribbon or an infinite symbol ' ) ≪ / RTI >

In other words, the first conductor line 2210 and the second conductor line 2220 are disposed on the opposite side of the substrate 2100 to each other, and are connected by a connecting member 2230 at both ends thereof when viewed from above The first conductor line 2210 and the second conductor line 2220 are arranged to form a path generally in the form of an eight (8), a twisted ribbon or an infinite The subsequent point can be arbitrarily selected to any two points on the path.

The capacitor 2240 may be provided to be inserted into either the first conductor line 2210 or the second conductor line 2220 on the path formed by the first conductor line 2210 and the second conductor line 2220 have. The capacitor 2240 may be provided as one or a plurality of capacitors.

9 to 10, the capacitor 2240 includes capacitors 2240a and 2240b inserted in both side line portions 2211 and 2212 of the first conductor line 2210, A capacitor 2240c inserted in the first diagonal line portion 2213 of the line 2210 and a capacitor 2240d inserted and disposed in the second conductor line 2220. [

The cell 2200 having the above-described structure may have a refractive index of '0' or a negative refractive index for an electromagnetic field. In the above description, the cell 2200 has a refractive index of '0' or a negative refractive index when the cell 2200 is provided with a PLH structure with reference to FIG.

In the case of the cell 2200 having the structure of FIGS. 9 to 12, a series capacitance may be generated by the capacitor 2240 inserted on the first conductor line 2210 or the second conductor line 2220. In addition, parallel inductance may be generated in the portion where the first conductor line 2210 and the second conductor line 2220 are connected by the connecting member 2230. Accordingly, the cell 2200 provided with the structures of FIGS. 9 to 12 forms a PLH structure and can have a refractive index of '0' or a negative refractive index with respect to an electromagnetic field.

Here, the first conductor line 2210 and the second conductor line 2220 are provided such that the path formed by the first conductor line 2210 and the second conductor line 2220 is symmetrical as a whole when viewed from above . When the plurality of capacitors 2240 are provided, the first and second conductor lines 2210 and 2220 may be disposed symmetrically with respect to the center of the path formed by the first conductor line 2210 and the second conductor line 2220. For example, the capacitor 2240 may be disposed at the overlapping portion of one conductor line 1200 and the second conductor line 2220 as viewed from above, or may be provided in pairs in a position that is symmetrical or point symmetrical about the overlapping portion have.

When the path formed by the first conductor line 2210 and the second conductor line 2220 has a symmetrical structure, the inductance generated thereby forms a balance, and when the capacitor 2240 is symmetrically arranged, the capacitance The effect of stably refracting the electromagnetic field is generated as a whole, so that it is possible to achieve more stable focusing of the electromagnetic field.

Various modifications of the form in which the cell 2200 according to an embodiment of the present invention is provided will now be described.

Capacitors 2240a, 2240b, 2240c and 2240d are respectively connected to both side line portions 2211 and 2212 and first diagonal line portion 2210 of the first conductor line 2210 in the first form of the cell 2200 of FIGS. 2213 and the second conductor line 2220, respectively. Here, the capacitor 2240 does not necessarily have to be disposed at the above-described position.

For example, the number of capacitors 2240 can be appropriately adjusted.

13 is a diagram of a second embodiment of a cell 2200 according to an embodiment of the present invention. 13, the capacitor 2240 may include only one capacitor 2240b disposed on the other one of the two side members 2212 of the first conductor line 2210. In this case,

14 is a diagram of a third embodiment of a cell 2200 according to an embodiment of the present invention. Referring to FIG. 14, the capacitor 2240 may include only one capacitor 2240d disposed in the second conductor line 2220. FIG.

In addition, the capacitor 2240 may be suitably arranged in a desired number at a desired point. For example, the cell 2200 may include at least one of a first capacitor 2240a, a second capacitor 2240b, a third capacitor 2240c, and a fourth capacitor 2240d.

The position of the capacitor 2240 is not limited to the positions of the first capacitor 2240a, the second capacitor 2240b, the third capacitor 2240c and the fourth capacitor 2240d. It is also possible to arrange them in a number.

It is also possible to use an air capacitor instead of the capacitor 2240. In other words, a gap can be formed at a position where the capacitor 2240 is provided. The gap can act as an air capacitor.

15 is a diagram of a fourth embodiment of a cell 2200 according to an embodiment of the present invention.

A first gap 2250a is formed in the first conductor line 2210 and a second conductor line 2220 in the position where the first capacitor 2240a, the second capacitor 2240b and the fourth capacitor 2240d are disposed, Two gaps 2250d and a third gap 2250d may be formed. Here, the third capacitor 2240c may be omitted.

Of course, in the case of replacing the capacitor 2240 with an air capacitor as described above, not all of the capacitors 2240 are necessarily replaced with air capacitors, and all or a part of the capacitors 2240 may be replaced with air capacitors Do.

Here, the gap 2250 operating as an air capacitor is not limited to the above-described example, but can be appropriately arranged in a desired number in a desired position.

It is also possible that a gap 2250 and a capacitor 2240, which are air capacitors, are provided simultaneously in the cell 2200.

16 is a diagram of a fifth embodiment of a cell 2200 according to an embodiment of the present invention.

Referring to FIG. 16, the cell 2200 may be provided with two gaps 2250a and 2250b and one capacitor 2240d. In other words, the first conductor line 2210 and the second conductor line 2220 can be arranged in a combination of the capacitor 2240 and the gap 2250 appropriately at a desired position and a desired point.

9 through 16, the cells 2200 are connected by a connecting member 2230 and are provided on opposite sides of the substrate 2100 with each other, A first conductor line 2210 and a second conductor line 2220 forming a path are formed on the first conductor line 2210 and the second conductor line 2220. The first conductor line 2210 and the second conductor line 2220 include a suitable number of capacitors 2240 and a gap 2250 may be provided. Here, the capacitor 2240 and the gap 2250 may be disposed symmetrically with respect to the entire top view, and may be formed in a twisted shape formed by the first conductor line 2210 and the second conductor line 2220 The pattern can also have a symmetrical structure when viewed from above.

Hereinafter, another modification of the cell 2200 will be described.

FIGS. 17 through 19 are views of a modified example in which a zigzag pattern is added to the cell 2200 according to the embodiment of the present invention.

17 is a view of a sixth embodiment of a cell 2200 according to an embodiment of the present invention.

Referring to FIG. 17, the first conductor line 2210 may include a zigzag pattern 2260. The zigzag pattern portion 2260 may be formed in the first diagonal line portion 2213 of FIG. In other words, the first diagonal line portion 2213 may have a pattern formed in the center of the first diagonal line portion 2213. The jig jig pattern portion 2260 generates a capacitance by coupling between the paths constituting the pattern so that an effect similar to the insertion of the capacitor 2240 on the first conductor line 2210 can be generated.

Meanwhile, even when the first conductor line 2210 has the jig jig pattern portion 2260, the capacitor 2240 and the gap 2250 can be appropriately changed to a desired number at a desired position.

18 is a view of a seventh embodiment of a cell 2200 according to an embodiment of the present invention.

Referring to FIG. 18, it can be seen that a capacitor 2240d is added to the second conductor line 2220 as compared to the cell 2200 of FIG. It is also possible to omit a part of each of the capacitors 2240a, 2240b and 2240d or to change the capacitors 2240a, 2240b and 2240d into a gap 2250 which is an air capacitor, It is also possible that the capacitor 2240 is inserted.

17 and 18, the jig jig pattern portion 2260 is formed on the first conductor line 2210 of FIG. 9. However, the jig jig pattern portion 2260 may be formed on the second conductor line 2220 It is possible.

FIG. 19 is a diagram relating to an eighth embodiment of the cell 2200 according to the embodiment of the present invention.

Referring to FIG. 19, the first conductor line 2210 may be provided with a first jig jig pattern portion 2260a, and the second conductor line 2220 may be provided with a second jig jig pattern portion 2260b.

Various types of cells 2200 have been described above with reference to FIGS. However, the shape of the cell 2200 according to the embodiment of the present invention is not limited to the above-described shape.

For example, in the cell 2200, the capacitor 2240, the gap 2250, which is an air capacitor, and the zigzag pattern portion 2260 may be arranged in appropriate numbers, as appropriate, in a suitable location.

Further, each of the above-described forms of the cell 2200 may be used in combination with each other.

Hereinafter, a wireless power receiving method according to an embodiment of the present invention will be described. The wireless power receiving method will be described using the wireless power transmission system 1000 described above. However, the present invention is not limited to the wireless power receiving method, and may be performed using another similar system.

20 is a flowchart of a wireless power receiving method according to an embodiment of the present invention.

Referring to FIG. 20, a wireless power receiving method includes a step S110 of emitting a magnetic field of a specific frequency, a step S120 of focusing a magnetic field of a specific frequency, a step S130 of receiving a magnetic field of a specific frequency, And receiving the power using the magnetic field (S140). Hereinafter, each of the above-described steps will be described.

First, the transmission antenna 1150 emits a magnetic field having a specific frequency (S110). Transmit antenna 1150 emits a magnetic field of a specific frequency using alternating current power oscillated at a specific frequency. The specific frequency may be a resonant frequency.

Here, the magnetic field emitted from the transmitting antenna 1150 can be focused by the magnetic field lens 1160 toward the wireless power receiving apparatus 1200. Here, the magnetic field lens 1160 may be a metamaterial structure 2000, and the metamaterial structure 2000 may be provided in a structure in which a plurality of cells 2200 are arrayed on a substrate 2100.

Next, the magnetic field lens 1210 disposed in front of the receiving antenna 1220 focuses the radiated magnetic field to the receiving antenna 1220 (S120). The magnetic field lens 1210 may have a refractive index of '0' or a negative refractive index for an electromagnetic field of a specific frequency band. Accordingly, the electromagnetic field radiated and incident on the magnetic field lens 1210 can be focused on the receiving antenna 1220. Here, the magnetic field lens 1210 may be a meta-material structure 2000, and the meta-material structure 2000 may be provided in a structure in which a plurality of cells 2200 are arrayed on a substrate 2100.

The receiving antenna 1220 receives a magnetic field of a specific frequency (S130). The receiving antenna 1220 can generate electric current by the magnetic field focused by the magnetic field lens 1210 to receive the electric power (S140).

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas falling within the scope of the same shall be construed as falling within the scope of the present invention.

1000: Wireless power transmission system
1100: Wireless power transmission device
1110: AC-DC converter
1120: Frequency oscillator
1130: Power amplifier
1140: Impedance matcher
1150: Transit Centena
1160: magnetic field lens
1200: wireless power receiving device
1210: Magnetic field lens
1220: Receive antenna
1230: Impedance matching device
1240: Rectifier
1250: DC-DC converter
1260: Battery
2000: metamaterial structure
2100: substrate
2200: cell
2210: first conductor line
2220: second conductor line
2230:
2240: Capacitor
2250: Gap
2260: jig jig pattern part
S: Power source

Claims (20)

A receiving antenna for receiving a magnetic field of a specific frequency and receiving power; And
A substrate disposed to face the reception antenna and a magnetic field of the specific frequency radiated from the wireless power transmission apparatus as the magnetic refractive index for the specific frequency is provided to be less than or equal to zero; And a magnetic field lens including a plurality of cells focused by an antenna,
Wherein each of the plurality of cells includes a first conductor line disposed on one side of the substrate, a second conductor line disposed on an opposite side of the substrate, and a second conductor line disposed on both sides of the first conductor line and the second conductor line Wherein the first conductor line and the second conductor line are provided so that both ends of the first conductor line and the second conductor line are located at the same point when viewed from above and form a twisted path
Wireless power receiver.
The method according to claim 1,
The first conductor line and the second conductor line are provided to form a path in the form of an elongated, twisted ribbon or infinite symbol when viewed from above
Wireless power receiver.
The method according to claim 1,
The first conductor line and the second conductor line are provided such that a path formed by the first conductor line and a path formed by the second conductor line cross each other when viewed from above
Wireless power receiver.
The method of claim 3,
The first conductor line and the second conductor line are provided so as to form a symmetrical path around a point where a path formed by the first conductor line and a path formed by the second conductor line intersect with each other felled
Wireless power receiver.
The method according to claim 1,
At least one gap acting as an air capacitor is formed on a path formed by the first conductor line and the second conductor line
Wireless power receiver.
6. The method of claim 5,
Wherein the first conductor line and the second conductor line are provided such that a path formed by the first conductor line and a path formed by the second conductor line cross each other when viewed from above,
The first conductor line and the second conductor line are provided so as to form a symmetrical path around a point where a path formed by the first conductor line and a path formed by the second conductor line intersect with each other And,
The at least one gap may be provided at a point symmetrical to each other about the intersecting point or provided at the intersecting point
Wireless power receiver.
The method according to claim 1,
Wherein each of the plurality of cells further includes at least one capacitor inserted on a path formed by the first conductor line and the second conductor line
Wireless power receiver.
8. The method of claim 7,
Wherein the first conductor line and the second conductor line are provided such that a path formed by the first conductor line and a path formed by the second conductor line cross each other when viewed from above,
The first conductor line and the second conductor line are provided so as to form a symmetrical path around a point where a path formed by the first conductor line and a path formed by the second conductor line intersect with each other And,
The at least one capacitor is provided at a point symmetrical to each other about the intersecting point or provided at the intersecting point
Wireless power receiver.
The method according to claim 1,
Wherein at least one of the first conductor line and the second conductor line includes a pattern line provided in a zigzag form on a path formed by the first conductor line and the second conductor line
Wireless power receiver.
10. The method of claim 9,
Wherein the first conductor line and the second conductor line are provided such that a path formed by the first conductor line and a path formed by the second conductor line cross each other when viewed from above,
The first conductor line and the second conductor line are provided so as to form a symmetrical path around a point where a path formed by the first conductor line and a path formed by the second conductor line intersect with each other And,
Wherein the at least one pattern line is provided at a point symmetrical to each other about the intersecting point or provided at the intersecting point
Wireless power receiver.
A receiving antenna for receiving a magnetic field of a specific frequency and receiving power;
A substrate disposed to face the reception antenna and a magnetic field of the specific frequency radiated from the wireless power transmission apparatus as the magnetic refractive index for the specific frequency is provided to be less than or equal to zero; A magnetic field lens including a plurality of cells focused by an antenna;
A rectifier for rectifying the received power into a DC waveform; And
And a battery that is charged using the rectified power,
Wherein each of the plurality of cells includes a first conductor line disposed on one side of the substrate, a second conductor line disposed on an opposite side of the substrate, and a second conductor line disposed on both sides of the first conductor line and the second conductor line Wherein the first conductor line and the second conductor line are provided so that both ends of the first conductor line and the second conductor line are located at the same point when viewed from above and form a twisted path
Wireless power receiving device.
12. The method of claim 11,
The first conductor line and the second conductor line are provided to form a path in the form of an elongated, twisted ribbon or infinite symbol when viewed from above
Wireless power receiving device.
12. The method of claim 11,
The first conductor line and the second conductor line are provided such that a path formed by the first conductor line and a path formed by the second conductor line cross each other when viewed from above
Wireless power receiving device.
14. The method of claim 13,
The first conductor line and the second conductor line are provided so as to form a symmetrical path around a point where a path formed by the first conductor line and a path formed by the second conductor line intersect with each other felled
Wireless power receiving device.
12. The method of claim 11,
At least one gap acting as an air capacitor is formed on a path formed by the first conductor line and the second conductor line
Wireless power receiving device.
16. The method of claim 15,
Wherein the first conductor line and the second conductor line are provided such that a path formed by the first conductor line and a path formed by the second conductor line cross each other when viewed from above,
The first conductor line and the second conductor line are provided so as to form a symmetrical path around a point where a path formed by the first conductor line and a path formed by the second conductor line intersect with each other And,
The at least one gap may be provided at a point symmetrical to each other about the intersecting point or provided at the intersecting point
Wireless power receiving device.
12. The method of claim 11,
Wherein each of the plurality of cells further includes at least one capacitor inserted on a path formed by the first conductor line and the second conductor line
Wireless power receiving device.
18. The method of claim 17,
Wherein the first conductor line and the second conductor line are provided such that a path formed by the first conductor line and a path formed by the second conductor line cross each other when viewed from above,
The first conductor line and the second conductor line are provided so as to form a symmetrical path around a point where a path formed by the first conductor line and a path formed by the second conductor line intersect with each other And,
The at least one capacitor is provided at a point symmetrical to each other about the intersecting point or provided at the intersecting point
Wireless power receiving device.
12. The method of claim 11,
Wherein at least one of the first conductor line and the second conductor line includes a pattern line provided in a zigzag form on a path formed by the first conductor line and the second conductor line
Wireless power receiving device.
20. The method of claim 19,
Wherein the first conductor line and the second conductor line are provided such that a path formed by the first conductor line and a path formed by the second conductor line cross each other when viewed from above,
The first conductor line and the second conductor line are provided so as to form a symmetrical path around a point where a path formed by the first conductor line and a path formed by the second conductor line intersect with each other And,
Wherein the at least one pattern line is provided at a point symmetrical to each other about the intersecting point or provided at the intersecting point
Wireless power receiving device.
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