KR20140021694A - Dual-mode antenna - Google Patents

Abstract

The present invention relates to a dual mode antenna. The dual mode antenna according to the present invention comprises: an isolation sheet; a pair of NFC coil power terminals connected electrically to an NFC module; NFC coils formed on the isolation sheet, and electrically connected to the NFC coil power terminals by having one end electrically connected to any one of the NFC coil power terminals through a stitching via; a wireless power transmitting coil placed at the inner side of a roof formed by the NFC coils; a pair of wireless power transmitting coil power terminals connecting the wireless power transmitting coil with a wireless power transmitting module and coupled electrically to the wireless power transmitting module; and a loading pattern coupled electrically to the wireless power transmitting coil power terminals. [Reference numerals] (210) NFC impedance matching unit; (220) NFC transceiver; (230) NFC controller; (310) W/C impedance matching unit; (320) Rectifying unit; (330) Charging unit; (400) Control unit

Description

Dual-Mode Antenna

The present invention relates to a dual mode antenna for NFC and wireless power transmission.

Recently, interest in energy-IT convergence technology is increasing. Energy-IT convergence technology refers to the fusion of IT technology that is rapidly developing in the conventional energy technology, and there is a wireless power transfer (WPT) technology as one field of such energy-IT convergence technology. Wireless power transmission refers to a technology of supplying power to an electric device wirelessly instead of a conventional wired power line. In order to charge a home appliance, a wireless power transmission is conventionally performed without connecting a wired power cable from a power outlet to a home appliance or a charger. Due to the advantage of being able to charge wirelessly, research is being actively conducted.

There are two types of wireless power transmission technologies currently in commercialization or research: magnetic induction and magnetic resonance. Magnetic induction wireless power transmission technology uses magnetic induction between two coils, which can transmit several W of power from a distance of several mm to several cm, and is currently applied to transportation cards, wireless shavers, electric toothbrushes, and the like. have. On the other hand, the magnetic resonance wireless power transmission technology is a method of transmitting power by the resonant coupling (resonant coupling) at the resonant frequency, can transmit several tens of W power within a distance of several meters, the Q (Quality) of the resonator The transmission efficiency is affected by the factor value.

On the other hand, a large number of mobile terminals recently released are being equipped with NFC modules to enable NFC communication. Near Field Communication (NFC) is a near field communication technology that transmits and receives data at a distance of about 10 cm using a frequency of 13.56 MHz band. The NFC module is mounted on a mobile terminal and used in various fields such as user authentication, ID card, credit card, mobile ticket, and mobile coupon.

On the other hand, NFC communication antenna (coil) is required for NFC communication. NFC antenna and the antenna of the NFC tag and the NFC tag are each provided independently, when implemented on the actual mobile terminal is generally used an integrated dual antenna structure integrating the NFC reader antenna and the tag antenna in a stacked structure.

In addition, in the case of wireless power transmission, a separate wireless power transmission antenna (coil) is required. Accordingly, in order to simultaneously support the NFC function and the wireless power transmission function on the mobile terminal, an antenna for each function must be mounted together. In this case, the antenna mounting space is narrow due to the limitation of the size of the mobile terminal, and the size and thickness of the mobile terminal increase due to the two types of antennas.

Therefore, while the NFC antenna and the wireless power transmission antenna is mounted on the mobile terminal together, there is a demand for the introduction of a technology that can reduce the required mounting space to a minimum.

In this regard, US Patent Application Publication No. US2010-0194334 discloses an invention named "RETROFITTING WIRELESS POWER AND NEAR-FIELD COMMUNICATION IN ELECTRONIC DEVICESZ." The present invention relates to a power circuit for wireless power transmission and short-range communication, wherein an electronic device having the power circuit includes a back housing having a wireless power receiving antenna and a conversion circuit. However, although US Patent Publication No. US2010-0194334 discloses that the wireless power receiving antenna may be used for the wireless power supply function or the NFC function, a specific configuration for simultaneously performing the wireless power supply function and the NFC function is not disclosed. .

United States Patent Application Publication No. US2010-0194334, "RETROFITTING WIRELESS POWER AND NEAR-FIELD COMMUNICATION IN ELECTRONIC DEVICES"

In order to solve the above problems of the prior art, the present invention provides a printed circuit board for a dual mode antenna, a dual mode antenna, and a user terminal equipped with the same, which simultaneously support NFC communication and wireless power transmission.

The present invention also provides a printed circuit board for a dual mode antenna, a dual mode antenna, and a user terminal equipped with the NFC antenna and the wireless power transmission antenna, which do not overlap each other to suppress communication performance degradation due to mutual interference.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood from the following description.

In order to achieve the above object, a printed circuit board for a dual mode antenna according to an aspect of the present invention, the loop-shaped first coil formed on one surface of the insulating sheet and the loop shape formed inside the loop of the first coil The second coil of the.

Here, the second coil may be formed in a laminated structure on both sides of the insulating sheet.

Here, the first coil and the second coil may be an NFC loop antenna and a wireless power transmission coil, respectively.

Here, a pair of first connection terminals connected to both ends of the first coil and electrically connected to a pair of first external circuit terminals, respectively, and connected to both ends of the second coil, respectively, It may include a pair of second connection terminals in electrical contact with the second external circuit terminal.

Here, the first external circuit terminal and the second external circuit terminal may be connected to an external NFC module and a wireless power transmission module, respectively.

Here, any one of the pair of first connection terminals is connected to one end of the first coil through a stitching via, the stitching via penetrates the insulating sheet and one end of the pair of first A first via connected to one of the first connection terminals, a second via penetrating the insulating sheet, and one end of which is connected to one end of the first coil, and one end of which is formed on the other surface of the insulating sheet It may include a connection pattern connected to the other end of the other end and the other end of the second via.

Here, any one of the pair of first connection terminals may be connected to one end of the first coil through a jumper line.

Here, the jumper wire may be formed between the ferrite sheet and the first coil formed to contact one surface of the insulating sheet.

Here, the method may further include a ferrite sheet formed to contact one surface of the insulating sheet.

Here, the ferrite sheet is a first ferrite sheet formed to be in contact with the position facing the first coil of the insulating sheet, and the second ferrite formed to be in contact with the position opposite to the second coil of the insulating sheet. The sheet may further include.

Here, a slit for adjusting the level difference between the first ferrite sheet and the second ferrite sheet may be formed between the first coil and the second coil.

The printed circuit board for the dual mode antenna may include a pair of extension patterns having one end connected to the pair of second connection terminals and the other end connected to the second coil.

The second coil may include a first loop having one end connected to any one of the pair of extension patterns, the first loop being formed to be wound a plurality of times in a first direction on the other surface of the insulating sheet, and one end of the pair of the pair of extension patterns. It is connected to the other of the extension pattern, it may be formed in a laminated structure of a second loop formed to be wound a plurality of times in a direction in which the current flowing through the first loop is reinforced on one surface of the insulating sheet.

The second coil may further include a third via penetrating the insulating sheet and connecting the other end of the first loop to the other end of the second loop.

Here, the second coil may further include a fourth via penetrating the insulating sheet and connecting one end of the second loop to the other of the pair of extension patterns.

In addition, the dual mode antenna according to another aspect of the present invention, a loop-shaped NFC coil formed on one surface of a printed circuit board, a loop-shaped wireless power transmission coil formed on the printed circuit board, both ends of the NFC coil A pair of NFC connection terminals connected to each other and electrically connected to the NFC module and a pair of W / C connection terminals respectively connected to both ends of the wireless power transmission coil and electrically connected to the wireless power transmission module, The wireless power transmission coil is formed in a laminated structure on both sides of the printed circuit board.

Here, the wireless power transmission coil may be formed inside the loop of the NFC coil.

Here, the printed circuit board may be an FPCB.

Here, any one of the pair of NFC connection terminals is connected to one end of the NFC coil through a stitching via, the stitching via passes through the printed circuit board and one end of the pair of NFC connection terminals. A first via connected to the second via, a second via penetrating the printed circuit board and one end connected to one end of the NFC coil, and formed at the other surface of the printed circuit board and one end connected to the other end of the first via The other end may further include a connection pattern connected to the other end of the second via.

Here, any one of the pair of NFC connection terminals may be connected to one end of the NFC coil through a jumper wire.

Here, the jumper wire may be formed between the ferrite sheet and the NFC coil formed to contact one surface of the printed circuit board.

Here, the dual mode antenna may further include a ferrite sheet formed to contact one surface of the insulating sheet.

Here, the ferrite sheet is formed so as to be in contact with the ferrite sheet for NFC coil formed to be in contact with the position facing the NFC coil of the printed circuit board, and the position facing the wireless power transfer coil of the printed circuit board. It may further include a ferrite sheet for a wireless power transmission coil.

Here, a slit for step adjustment of the ferrite sheet for the NFC coil and the ferrite sheet for the wireless power transmission coil may be formed between the NFC coil and the wireless power transmission coil.

The dual mode antenna may include a pair of extension patterns, one end of which is connected to the pair of W / C connection terminals and the other end of which is connected to the wireless power transmission coil.

Here, the wireless power transmission coil, an upper loop, one end of which is connected to any one of the pair of extension patterns and formed to be wound a plurality of times in a first direction on the other surface of the printed circuit board, and one end of the pair of It may be formed as a laminated structure of a lower loop connected to the other of the extension pattern and formed to be wound a plurality of times in a direction in which a current flowing through the upper loop is reinforced on one surface of the printed circuit board.

Here, the wireless power transmission coil may further include a third via penetrating the printed circuit board and connecting the other end of the upper loop and the other end of the lower loop.

Here, the wireless power transmission coil may further include a fourth via penetrating the printed circuit board and connecting one end of the lower loop and the other of the pair of extension patterns.

In addition, a user terminal having an NFC function and a wireless power function according to another aspect of the present invention, a dual mode antenna including an NFC coil and a wireless power transmission coil, NFC module for performing NFC communication using the NFC coil And a wireless power transmission module configured to wirelessly transmit power using the wireless power transmission coil 3, in the dual mode antenna, the NFC coil is formed on one surface of an insulating sheet, and the wireless power transmission coil is the NFC. It is formed inside the coil, and the wireless power transfer coil is formed in a laminated structure on both sides of the insulating sheet.

The dual mode antenna may be connected to both ends of the NFC coil and electrically connected to the pair of NFC connection terminals electrically connected to the NFC module and to both ends of the wireless power transmission coil. It may further include a pair of W / C connection terminal connected to.

Here, any one of the pair of NFC connection terminals is connected to one end of the NFC coil through a stitching via, the stitching via penetrates through the insulating sheet and one end thereof is connected to any one of the pair of NFC connection terminals. A first via to be connected, a second via penetrating through the insulating sheet, and one end of which is connected to one end of the NFC coil, and formed on the other surface of the insulating sheet, and one end of which is connected to the other end of the first via, It may include a connection pattern connected to the other end of the second via.

Here, any one of the pair of NFC connection terminals may be connected to one end of the NFC coil through a jumper wire.

Here, the jumper wire may be formed between the ferrite sheet and the NFC coil formed to contact one surface of the insulating sheet.

Here, the user terminal may include a pair of extension patterns, one end of which is connected to the pair of W / C connection terminals and the other end of which is connected to the wireless power transmission coil.

Here, the wireless power transmission coil, one end is connected to any one of the pair of extension patterns, the upper loop is formed to be wound a plurality of times in a first direction on the other surface of the insulating sheet, one end of the pair It is connected to the other of the extension pattern, it may be formed in a laminated structure of the lower loop formed to be wound a plurality of times in the direction in which the current flowing through the upper loop is reinforced on one surface of the insulating sheet.

Here, the wireless power transmission coil may further include a third via penetrating the insulating sheet and connecting the other end of the upper loop and the other end of the lower loop.

Here, the wireless power transmission coil may further include a fourth via penetrating the insulating sheet and connecting one end of the lower loop and the other of the pair of extension patterns.

In addition, a printed circuit board for a dual mode antenna according to another aspect of the present invention, a loop-shaped NFC coil formed on one surface of the insulating sheet, a loop-shaped wireless power transmission coil formed on the insulating sheet, the NFC coil A pair of NFC connection terminals connected to both ends of the pair and electrically connected to an external NFC module, A pair of W / C connected to both ends of the wireless power transfer coil and electrically connected to an external wireless power transfer module, respectively. NFC connection terminal connection line, one end is connected to one end of the NFC coil and the other end is connected to any one of the pair of NFC connection terminal and one end is connected to the pair of W / C connection terminal and the other end is And a pair of W / C connection terminal connection lines connected to the wireless power transmission coil.

Here, the NFC connection terminal connection line may be formed of a jumper line or a stitching via.

Here, the stitching via may include a first via penetrating the insulating sheet and having one end connected to any one of the pair of NFC connection terminals, and a second penetrating through the insulating sheet and having one end connected to one end of the NFC coil. 2 vias, and a connection pattern formed on the other surface of the insulating sheet, one end of which is connected to the other end of the first via and the other end of which is connected to the other end of the second via.

Here, the jumper wire may be formed between the ferrite sheet and the NFC coil formed to contact one surface of the insulating sheet.

Here, the wireless power transmission coil may be formed inside the loop of the NFC coil.

Here, the wireless power transmission coil may be formed in a laminated structure on both sides of the insulating sheet.

Here, the wireless power transmission coil, the first loop is formed so that one end is connected to any one of the pair of W / C connection terminal connecting line and wound on the one surface of the insulating sheet a plurality of times in a first direction, and It is formed of a laminated structure of a second loop connected to the other of the pair of W / C connection terminal connecting line and formed to be wound a plurality of times in a direction in which a current flowing through the first loop is reinforced on the other surface of the insulating sheet. Can be.

In addition, the dual mode antenna according to another aspect of the present invention, a loop-shaped NFC coil formed on the first insulating sheet, a wireless power transmission coil formed inside the loop of the NFC coil, the wireless power transmission coil An extension line connecting to an external W / C module, each connected to both ends of the NFC coil, and a pair of NFC connection terminals electrically connected to an external NFC module, and both ends of the wireless power transmission coil, And a pair of W / C connection terminals electrically connected to an external wireless power transfer module.

Here, the wireless power transmission coil may be formed of a real coil.

Here, further comprising an extension line slot formed inside the loop of the NFC coil through the first insulating sheet, wherein the extension line is inserted through the extension line slot to form an inside of the loop of the NFC coil. It may be combined with the wireless power transmission coil.

Here, the extension line and the W / C connection terminal may be formed on the second insulating sheet.

Here, the wireless power transmission coil may be formed in a laminated structure on both sides of the third insulating sheet.

The dual mode antenna may further include a jumper line or a stitching via connecting one of the pair of NFC connection terminals to the NFC coil.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. It is provided to fully inform the owner of the scope of the invention.

According to one of the problem solving means of the present invention described above, it is possible to efficiently arrange the antenna mounting space in the user terminal to support NFC communication and wireless power transmission at the same time.

In addition, by arranging the NFC antenna and the wireless power transmission antenna so as not to overlap each other in the user terminal, communication performance degradation due to mutual interference may be suppressed.

1 is an overall schematic diagram of a wireless power transfer system.
2 is a view for explaining the detailed configuration of the user terminal according to an embodiment of the present invention.
3 is an exploded view of a rear cover and a rear cover of a main body of a user terminal for describing a case in which a dual mode antenna is mounted on a rear cover of a user terminal according to an embodiment of the present invention.
4 is a front view and a rear view of a dual mode antenna according to an embodiment of the present invention.
5 is a front view and a rear view of a dual mode antenna according to another embodiment of the present invention.
6 is a side view for explaining the structure of a dual mode antenna according to an embodiment of the present invention.
7 is a front view and a rear view of a dual mode antenna according to another embodiment of the present invention.
8 is a front view and a rear view showing the detailed configuration of the NFC antenna unit which is a component of the dual mode antenna of FIG.
9 is a front view and a rear view showing the detailed configuration of the extension line portion that is a component of the dual mode antenna of FIG.
FIG. 10 is a front view and a rear view illustrating a detailed configuration of a wireless power transmission coil that is a component of the dual mode antenna of FIG. 7.

While the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and similarities. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In addition, numerals (e.g., first, second, etc.) used in the description of the present invention are merely an identifier for distinguishing one component from another.

Also, in this specification, when an element is referred to as being "connected" or "connected" with another element, the element may be directly connected or directly connected to the other element, It should be understood that, unless an opposite description is present, it may be connected or connected via another element in the middle.

In the present specification, the user terminal is an externally powered electronic device, and supports NFC communication as one of means for communication with other user terminals, for example, a mobile phone, a smart phone, a notebook computer. It may be a mobile mobile terminal, such as a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), navigation, or the like, or may communicate with an external device such as a TV, an electronic frame, a refrigerator, or the like. It may be any electronic device that performs.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a general schematic diagram illustrating the concept and operation of a wireless power transmission system.

As shown in FIG. 1, the wireless power transmission system includes a wireless power transmitter 10 (or a transmitter) for transmitting power wirelessly, and a wireless power receiver 20 (or, for wirelessly receiving power). Power receiver).

The wireless power transmitter 10 and the wireless power receiver 20 wirelessly transmit power in a magnetic induction manner.

The wireless power transmitter 10 radiates an electromagnetic field to the outside using the power transmission antenna 11 for power transmission. To this end, the wireless power transmitter 10 receives AC power from the outside.

The wireless power transmitter 10 rectifies the AC power supplied from an external input power source into a DC power source using an AC / DC converter (not shown), and thereafter, a DC / AC conversion circuit (not shown) for wireless power transmission. Reconverted to a high frequency AC power through the transmission, and transmits to the wireless power receiver 20 via the power transmission antenna (11).

The wireless power receiver 20 may receive the power signal transmitted from the wireless power transmitter 10 using the power receiving antenna 21. In detail, a magnetic field is generated around the power transmission antenna 11 by a current flowing through the power transmission antenna 11 of the wireless power transmitter 10, and the wireless power receiver disposed adjacent to the magnetic field by electromagnetic induction ( Voltage may be induced in the power receiving antenna 21 of 20 to transmit power.

The wireless power receiver 20 may charge the load device 30 by using the transmitted power or supply driving power for driving the wireless power receiver 20.

Hereinafter, a detailed configuration of a user terminal having a dual mode antenna according to an embodiment of the present invention will be described.

2 is a block diagram illustrating a detailed configuration of a user terminal according to an embodiment of the present invention.

As shown in FIG. 2, the user terminal includes an NFC module 200 that processes NFC communication and a wireless power transmission module 300 that performs a wireless power transmission function. In addition, the user terminal may include a dual mode antenna 100 including an NFC coil 110 electrically connected to the NFC module 200 and a wireless power transmission coil 120 electrically connected to the wireless power transmission module 300. It includes more.

The dual mode antenna 100 may be implemented in a double loop shape in which the NFC coil 110 and the wireless power transmission coil 120 are spaced at regular intervals. The dual mode antenna 100 may have a structure in which a pattern of the NFC coil 110 and the wireless power transmission coil 120 is formed on an insulating sheet, and may be formed using, for example, a flexible printed circuit board (FPCB). .

In this case, the NFC coil 110 and the wireless power transmission coil 120 is electrically separated from each other, in addition, the NFC coil 110 and the dual coil shape formed by the wireless power transmission coil 120 and The impedance matching of the coil may be controlled by adjusting the distance between the wireless power transmission coils 120.

The NFC module 200 controls the NFC coil 110 to perform NFC communication on the user terminal. In detail, the NFC module 200 includes an NFC impedance matching unit 210, an NFC transceiver 220, and an NFC controller 230.

When the NFC function is requested by the user or the operation of the application on the user terminal, the control unit 400 of the user terminal operates the NFC module 200 to activate the NFC function.

The NFC impedance matching unit 210 may be installed between the NFC coil 110 and the NFC transceiver 220 to match the impedance between the NFC coil 110 and the NFC transceiver 220.

The NFC transceiver 220 may include a baseband processor, a communication protocol processing circuit, a register file, a UART serial interface, and the like. Each component of the NFC transceiver 220 corresponds to a known technology, and thus description thereof will be omitted.

The NFC controller 230 is connected to the NFC transceiver 220 to control the overall operation of the NFC transceiver 220. In addition, the NFC controller 230 may communicate with an external host through a separate communication interface.

The wireless power transfer module 300 may include a wireless power transfer (W / C) impedance matching unit 310, a rectifier 320, and a charger 330.

The W / C impedance matching unit 310 may be disposed between the wireless power transfer coil 120 and the rectifier 320 to match the impedance between the wireless power transfer coil 120 and the rectifier 320.

The rectifier 320 rectifies the power signal input through the wireless power transmission coil 120 in a half-wave rectification form to rectify the DC power. The DC signal rectified by the rectifier 320 may be removed from the high frequency noise component by a filter not shown, and then converted into a voltage required for driving the charger 330 or the device.

The charging unit 330 charges an external load device or an internal battery by using power converted into a required voltage.

Next, a detailed configuration of the dual mode antenna 100 according to an embodiment of the present invention will be described in detail.

3 is an exploded view of a rear cover and a rear cover of a main body of a user terminal for describing a case in which a dual mode antenna is mounted on a rear cover of a user terminal according to an embodiment of the present invention.

As shown in FIG. 3, the dual mode antenna 100 may be mounted on the battery cover 700 of the user terminal. The dual mode antenna 100 may be attached to an inner surface of the battery cover 700 facing the main body 600 of the user terminal or integrally coupled to the inside of the battery cover 700. In this case, when the coupling is formed integrally inside the battery cover 700, the NFC coil connection terminal 130 and the W / C coil connection terminal 140 of the dual mode antenna 100 may have an inner surface of the battery cover 700. An opening may be formed in the corresponding portion so as to be exposed to the outside through. In this case, the NFC coil connection terminal 130 may be configured such that two terminals form a pair, and in the case of the W / C coil connection terminal 140, two terminals may be configured in a pair.

The NFC module connection terminal 620 and the W / C module connection terminal are located at positions opposite to the NFC coil connection terminal 130 and the W / C coil connection terminal 140 of the dual mode antenna 100 on the rear of the main body of the user terminal. 610 may be formed respectively. Therefore, when the battery cover 700 is coupled to the user terminal body 600, the NFC coil connecting terminal 130 and the W / C coil connecting terminal 140 are the NFC module connecting terminal 620 and the W / C module connecting terminal, respectively. 610 may be electrically connected in contact with it. In this case, the NFC module connection terminal 620 or the W / C module connection terminal 610 is formed in a C-clip shape and elastically connected with the NFC coil connection terminal 130 or the W / C coil connection terminal 140. Can be maintained.

Hereinafter, the implementation shape of the dual mode antenna 100 according to an embodiment of the present invention will be described in detail.

4 is a front view and a rear view of a dual mode antenna 100 according to an embodiment of the present invention.

Referring to FIG. 4, the dual mode antenna 100 is formed by forming an NFC pattern on an insulation sheet 105 such as an FPCB, and a pair of NFC coil connection terminals 130 and one on the front surface of the insulation sheet 105. A pair of W / C coil connection terminals 140 may be formed.

The NFC coil connection terminal 130 may be connected to the NFC coil 110 to transmit a signal input through the NFC module connection terminal 620 to the outside or an NFC signal received from the outside to the NFC module 300. .

The NFC coil 110 may be formed on the front side of the insulating sheet 105, and as wide as possible along the outside of the insulating sheet 105 in order to maximize the diameter of the loop and reduce the number of windings and the inter-winding capacitance of the loop. Is formed.

One end of the NFC coil 110 is connected to one of the NFC coil connection terminal 132, the NFC coil 110 is a pattern rotates inward to form a loop, one end of the NFC coil 110 in the loop It is connected to one of the NFC coil connection terminals 134 outside of the loop via a stitching via 150.

Stitching via 150 is composed of two vias 152 and 154 passing through the insulating sheet and a connection pattern 156 formed between the two vias 152 and 154 to form a signal connection path. Can be. In this case, the connection pattern 156 may be formed on the rear surface of the insulating sheet 105.

The W / C coil connection terminal 140 may be connected to the wireless power transmission coil 120 to transmit and receive the power signal input through the W / C module connection terminal 610.

The wireless power transmission coil 120 may be formed inside the loop formed by the NFC coil 110. In this case, the diameter of the wireless power transfer coil 120 is relatively small compared to the NFC coil 110, therefore, in order to secure the required number of windings, the wireless power transfer coil 120 is formed on the front surface of the insulating sheet 105 and It may be formed in a laminated structure on the back.

In this case, the wireless power transmission coil 122 formed on the front surface of the insulating sheet 105 has a loop shape converging therein, and passes through the insulating sheet through the via hole 162 inside the loop to wirelessly transfer the coil on the rear surface. 124 is connected.

At this time, the wireless power transfer coil 122 formed on the front surface of the insulating sheet 105 and the wireless power transfer coil 124 formed on the rear side rotate in the same direction when viewed from the front side and form a loop to form the wireless power transfer coil 120. The currents flowing through them can be reinforced with each other.

Both ends 142 and 144 of the W / C coil connection terminal and both ends of the wireless power transmission coil 120 are connected by a pair of extension patterns 170. The extension pattern 170 may have a variable shape according to the arrangement position of the W / C coil connection terminal 140, thereby ensuring flexibility in designing an internal circuit of the user terminal 100.

In addition, the extension pattern 170 is formed on the rear surface of the insulating sheet 105, and the W / C coil connection terminals 142 and 144 pass through the insulating sheet through a pair of via holes 143 and 145 and are formed on the rear surface. It may be connected to one side of the formed extension pattern 170.

The other side of the extension pattern 170 is connected to the wireless power transmission coil 120. One extension pattern of the pair of extension patterns 170 is connected to one end of the wireless power transfer coil 122 formed on the front surface of the insulating sheet 105 through the via hole 162, and the other extension pattern is insulated. It is connected to the other end of the wireless power transfer coil 124 formed on the back of the seat.

As described above, the wireless power transmission coil 120 may be connected to the W / C coil connecting terminal 140 by the extension patterns 170 formed on the back of the via holes 162, 164, 143, and 145 and the insulating sheet 105. Since it is connected, there is no overlapping area between the wireless power transmission coil 120 and the NFC coil 110 to prevent performance degradation due to mutual interference.

Meanwhile, a slit for adjusting the step may be formed between the NFC coil 110 and the wireless power transmission coil 120. Referring to FIG. 6, the ferrite sheet 194 for the W / C coil and the ferrite sheet 192 for the NFC coil may be attached to the front surface of the insulating sheet 105 in order. For reference, the ferrite sheet prevents shielding of magnetic flux due to eddy currents.

In this case, the size of the ferrite sheet 194 for the W / C coil is relatively smaller than the ferrite sheet 192 for the NFC coil, and therefore, the thickness of the portion where the ferrite sheet 194 for the W / C coil overlaps. Is relatively thicker than the thickness of the portion attached only the ferrite sheet 192 for the NFC coil.

Therefore, a terminal adjustment slit 198 is formed between the NFC coil 110 and the wireless power transmission coil 120 to adjust the step difference due to the thickness of the ferrite sheet as described above. 120 or the damage of the extension pattern 170 can be prevented.

5 is a front view and a rear view of a dual mode antenna according to another embodiment of the present invention.

As shown in FIG. 5, in the dual mode antenna 100 according to another embodiment of the present invention, the NFC coil 110 is formed on the insulating sheet 105 in the same manner as the dual mode antenna of FIG. 4. The wireless power transmission coil 120 may be formed inside the loop of 110. The NFC coil 110 and the wireless power transfer coil 120 are connected to the NFC coil connection terminal 130 and the W / C coil connection terminal 140, respectively.

One end of the NFC coil 110 is connected to one of the NFC coil connection terminal 132, the NFC coil 110 is a pattern rotates inward to form a loop, one end of the NFC coil 110 in the loop A jumper line 190 may be connected to one of the NFC coil connection terminals 134 outside the loop.

At this time, the jumper wire 190 is formed on the upper portion of the NFC coil 110 formed on the front surface of the insulating sheet 105, as shown in Figure 6, jumper the back of the insulating sheet 105, the NFC signal is introduced or drawn out Since the line 190 does not block, interference with the NFC coil 110 can be suppressed.

Next, a detailed configuration of the dual mode antenna according to another embodiment of the present invention will be described in detail.

7 is a front view and a rear view showing a detailed configuration of a dual mode antenna 1000 according to another embodiment of the present invention.

Referring to FIG. 7, the dual mode antenna 1000 connects an NFC antenna unit 1100 on which an NFC coil is formed, a wireless power transmission coil 1300, and the wireless power transmission coil 1300 with an external wireless power transmission module. It includes an extension line portion 1200 to. In this case, the NFC antenna unit 1100, the wireless power transmission coil 1300, and the extension line unit 1200 may be formed on separate insulating sheets, respectively.

In this case, the wireless power transmission coil 1300 may be disposed inside the loop formed by the NFC coil 1120 of the NFC antenna unit 1100. In this case, the wireless power transmission coil 1300 is located inside the loop. ) May be connected to the outside of the NFC coil 1120 through the extension line unit 1200.

Meanwhile, a ferrite sheet may be attached to the dual mode antenna 1000. In this case, the ferrite sheet may be composed of a ferrite sheet for the NFC coil bonded to the position opposite to the NFC antenna unit 1100 and a ferrite sheet for the wireless power transfer coil bonded to the position opposite to the wireless power transmission coil 1300. .

Looking at the detailed configuration of the NFC antenna unit 1100 with reference to Figure 8, NFC antenna unit 1100 is formed on the front of the first insulating sheet 1110, the first insulating sheet 1110 and the external NFC module And a pair of NFC connection terminals 1130 connected to each other, and an NFC coil 1120 formed in a loop shape on the front surface of the first insulating sheet 1110 and connected to the NFC connection terminals 1130.

In this case, one end of the NFC coil 1120 may be connected to the NFC connection terminal 1130 by the NFC connection terminal connection line 1140. In this case, the NFC connection terminal connection line 1140 may be implemented by a jumper line or a stitching via formed through the first insulating sheet 1100.

In addition, in the NFC antenna unit 1100, an extension line slot 1150 may be formed inside the loop of the NFC coil 1120, so that the extension line unit 1200 may be formed through the extension line slot 1150. It may be inserted and connected to the wireless power transmission coil 1300 inside the loop.

In this case, since the extension line unit 1200 is disposed between the front surface of the NFC antenna unit 1100 and the ferrite sheet, the extension line unit 1200 may reduce interference with the NFC coil 1120 by the extension line.

Looking at the detailed configuration of the extension line portion 1200 with reference to Figure 9, the extension line portion 1200 is a second insulating sheet 1210 separate from the first insulating sheet 1110 and the second insulating sheet 1210 A pair of W / C connection terminals 1220 formed on the front surface of the panel and connected to the wireless power transmission module, and a pair of W / C extension lines 1230 formed on the rear surface of the second insulating sheet 1210. And a pair of junctions 1260 connecting the W / C extension line 1230 with the wireless power transmission coil 1300.

In this case, the W / C extension line 1230 is connected to the W / C connection terminal 1220 through a pair of via holes 1240, and is connected to the junction 1260 through another pair of via holes 1250. Can be.

As described above, the wireless power transfer coil 1300 may be formed on a separate third insulating sheet. In this case, the wireless power transmission coil 1300 may be formed to overlap both sides of the third insulating sheet.

In addition, the wireless power transmission coil 1300 may be implemented as a real coil made of a highly conductive material. In this case, both ends 1310 and 1320 of the real coil may be coupled to the junction parts 1262 and 1264 by soldering or the like.

Through the above configuration, the user terminal of the present invention may be provided with an NFC antenna and a wireless power transmission antenna together in a narrow space, and performance by mutual interference by avoiding overlapping areas between the NFC antenna and the wireless power transmission antenna. There is an effect that can prevent degradation.

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.

Claims (11)

Insulation sheet;
A pair of NFC coil connection terminals electrically connected to the NFC module;
An NFC coil formed on the insulating sheet and electrically connected to the NFC coil connection terminal, and one of the pair of NFC coil connection terminals electrically connected to one end thereof through a stitching via;
A wireless power transmission coil disposed inside the loop formed by the NFC coil;
A pair of wireless power transfer coil connection terminals connecting the wireless power transfer coil to a wireless power transfer module and electrically connected to the wireless power transfer module; And
And an extension pattern having one end electrically connected to the wireless power connection terminal. The method of claim 1,
The stitching via includes a connection pattern, one end of which is electrically connected to the NFC coil through a via penetrating through the insulating sheet. 3. The method of claim 2,
The wireless power transmission coil is a dual mode antenna, characterized in that provided with a real coil. The method of claim 3,
Both ends of the real coil is a dual mode antenna, characterized in that electrically connected with the extension pattern. 5. The method of claim 4,
And the extension pattern electrically connects the wireless power transmission coil and the wireless power transmission coil connection terminal and is disposed so as not to overlap the NFC coil. The method of claim 5,
The extension pattern is a dual mode antenna, characterized in that formed on different surfaces of the NFC coil and the insulating sheet. The method of claim 1,
The stitching via is a dual mode antenna, characterized in that it comprises two vias through the insulating sheet on which the NFC coil connection terminal and the NFC coil is formed and a connection pattern for electrically connecting the two vias. The method of claim 7, wherein
The wireless power transmission coil is electrically separated from the NFC coil and formed inside the loop-shaped NFC coil, and formed on both sides of the insulating sheet and electrically connected to each other through via holes penetrating the insulating sheet.
The wireless power transmission coil formed on both sides of the insulating sheet is a dual mode antenna, characterized in that to form a loop so that the current is reinforced when viewed from the front. 9. The method of claim 8,
The wireless power transmission coil formed on both sides of the insulating sheet is a dual mode antenna, characterized in that to form a loop and rotate in the same direction as seen from the front. 10. The method of claim 9,
The ferrite sheet further comprises a first ferrite sheet formed to contact a position facing the NFC coil of the insulation sheet, and a second ferrite sheet formed to contact a position facing the wireless power transfer coil of the insulation sheet. Dual-mode antenna, characterized in that it comprises. 11. The method of claim 10,
And a slit for controlling the step difference between the first ferrite sheet and the second ferrite sheet is formed between the NFC coil and the wireless power transmission coil.

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