KR101843897B1 - Wiress antenna for wireless charging and nfc communication, and wireless device having the same - Google Patents

Abstract

A wireless antenna capable of simultaneously supporting wireless charging and NFC communication and a wireless terminal using the same are disclosed.
The present embodiment relates to an NFC antenna including a first coil portion and a second coil portion each having at least one first loop pattern, and an NFC antenna connected to the NFC antenna and formed at least between the first coil portion and the second coil portion And a charging antenna including an induction coil part having one second loop pattern and a coil rim constituting an inner rim of the induction coil part.
Accordingly, the present embodiment can improve the NFC recognition efficiency while wirelessly charging.

Description

TECHNICAL FIELD [0001] The present invention relates to a wireless antenna for wireless charging and NFC communication, and a wireless terminal using the wireless antenna.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless antenna, and more particularly, to a wireless antenna capable of simultaneously supporting wireless charging and NFC communication, and a wireless terminal using the same.

Due to the development of mobile communication and information processing technologies, smart phones provide various wireless Internet services such as video services as well as content services. These smart phones are applying Near Field Communication (NFC) technology to provide the aforementioned services.

NFC technology is a non-contact, short range wireless communication using the frequency band of 13.56 MHz, which means a communication technology that transmits data bidirectionally between terminals within a distance of 10 cm.

Further, in recent smart phones, a loop antenna having a wireless charging function is simultaneously provided to a loop antenna having the NFC function in order to enhance the user's convenience.

Wireless charging refers to non-connection charging, which can be done by simply placing the smartphone directly on the charger or by placing it near the charger. The wireless charging methods include a magnetic induction method, a magnetic resonance method, and an electromagnetic wave method.

However, in the past, a very small smart phone has to be provided with a loop antenna that supports a magnetic induction type wireless charging and a loop antenna that supports an NFC communication function at the same time. Therefore, charging efficiency due to interference between two loop antennas is reduced, The recognition efficiency is lowered.

- Korean Patent Registration No. 10-1505456 (Structure of Dual Mode NFC Antenna and WPT Antenna Using Switching) - Korean Patent Registration No. 10-1163574 (Wireless Antenna and Wireless Rechargeable Wireless Antenna Including Electromagnetic Wave Absorber for Wireless Recognition and Wireless Recharging, and Manufacturing Method Thereof)

In order to solve the above-described problems, the present invention has an object to provide a wireless antenna designed to additionally include a loop antenna supporting an NFC communication function inside a loop antenna supporting wireless charging, and a wireless terminal using the same. .

It is another object of the present invention to provide a wireless antenna designed to optimize a distance between an added loop antenna for NFC communication function and a loop antenna for wireless charging, and a wireless terminal using the same.

According to an embodiment of the present disclosure, there is provided an NFC antenna including a first coil portion and a second coil portion each having at least one first loop pattern, and at least an NFC antenna formed between the first coil portion and the second coil portion There is provided a wireless antenna including a charging antenna including an induction coil part having one second loop pattern and a coil rim constituting an inner rim of the induction coil part.

The NFC antenna further includes a coil connection portion connected between one side of the inner surface of the first coil portion and one side of the outer surface of the second coil portion.

The number of the second coil units may be determined within a range that satisfies a R (resistance) or Q (quilty factor) specification defined in a standard of WPC (Wireless Power Consortium) and PMA (Power Matrix Alliance).

The number of the second coil sections may have one inner turn.

The gap between the second coil portion and the coil rim portion may be determined within a range satisfying the R (resistance) or Q (quilty factor) specification.

The resistance specification may have 4 to 6 (?), And the Q-spec may have 23 to 27.

The distance between the second coil part and the coil rim may have a length of 40 to 70 mu m.

The NFC antenna may extend from one side of the inner surface of the first coil section to form a first end terminal of the first coil section.

The second coil portion may be formed such that the second terminal terminal formed at the end of the first loop pattern is electrically contacted with the terminal terminal portion.

The first loop pattern and the second loop pattern may be formed in a spiral loop pattern.

According to another embodiment of the present disclosure, there is provided a wireless communication system including a plurality of wireless antennas, a flexible circuit board (FPCB) for mounting the wireless antennas, a battery for charging electric power generated from the wireless antennas, And an NFC chip for transmitting and receiving communication data from the NFC antenna.

The first loop pattern and the second loop pattern may be formed in a spiral loop pattern.

The wireless antenna may be bent and formed on two sides of the FPCB.

As described above, in the present embodiments, the first coil part and the second coil part that perform NFC communication are formed inside and outside the induction coil part supporting wireless charging, and when they are connected, wireless charging is possible and NFC The recognition efficiency can be improved.

In addition, in the present embodiments, the interval between the second coil portion and the coil edge portion is determined within a range satisfying the R (resistance) or Q (quilty factor) specification defined in the WPC and PMA standards, or the number of the second coil portions The interference phenomenon between them can be suppressed.

Therefore, when the interference phenomenon is suppressed, the wireless charging efficiency and the NFC recognition efficiency are also improved.

1 and 2 are cross-sectional views illustrating an antenna structure of a wireless antenna according to an exemplary embodiment of the present invention.
3 is a cross-sectional view showing a connection structure of the wireless antenna shown in FIG.
FIG. 4 is a graph showing comparison of R specs versus internal turn intervals according to the number of internal turns of FIGS. 1 and 2. FIG.
FIG. 5 is a graph showing the results of comparing the Q specs with respect to the internal turn intervals of FIGS. 1 and 2. FIG.
6 is a schematic diagram schematically illustrating an example of a wireless terminal to which the wireless antenna of FIG. 1 is applied.
FIG. 7 is a schematic diagram schematically showing another example of a wireless terminal to which the wireless antenna of FIG. 1 is applied.

The following description of the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. For example, the first coil part and the second coil part are used as an application for distinguishing one element from another element.

Furthermore, it is to be understood that the term "and / or" as used herein is intended to include any and all possible combinations of one or more of the listed related items.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout.

<Example of wireless antenna>

1 and 2 are cross-sectional views illustrating an example of an antenna structure of a wireless antenna according to an embodiment of the present invention.

As shown in the figure, the wireless antenna 100 according to an embodiment includes an NFC antenna 110 for performing NFC communication, and a charge antenna 120 for wirelessly charging in association with a coil of the NFC antenna 110 .

The NFC antenna 110 includes a first coil part 111 having at least one first loop pattern 111 for NFC communication and a second coil part 111 formed inside the first coil part 111 and having a first coil part 111 And a second coil part 112 having at least one first loop pattern 112 as in the case of the first coil part 112. [

For example, the first loop pattern of the first coil section 111 is formed of spiral pattern structures having a substantially rectangular shape, and the second loop pattern of the second coil section 112 is formed of a substantially rectangular spiral pattern structure. The first loop pattern may be formed in a substantially circular spiral pattern structure.

As a result, the first loop pattern of the first coil part 111 and the first loop pattern of the second coil part 112 have the same spiral pattern structure, but may be different in terms of morphology. However, it is not limited to this, and various modifications such as having the same pattern structure are possible.

Here, unlike the first loop pattern of the first coil part 111, the first loop pattern of the second coil part 112 can be limited in the opening surface of the helical pattern.

This is because the R (Resistance) specification and / or the Q (Quilty Factor) specification defined by the standards of WPC (Wireless Power Consortium) and / or PMA (Power Matters Alliance) must be satisfied.

In general, the R specification recommended in the standards of the WPC (Wireless Power Consortium) and / or the PMA (Power Matters Alliance) is specified in the range of 4 to 6 (Ω), and the Q specification is set in the range of 23.00 to 27.00 .

For example, beyond this range, the Wireless Power Consortium (WPC) and / or Power Matters Alliance (WPC) standards are stipulated as such, because they degrade in terms of the efficiency of wireless charging and / or NFC recognition rates.

Accordingly, it is preferable that the number of the first loop patterns of the second coil part 112 is determined within a range satisfying the above-described range of the Rspecific value and / or the Qspecific value.

For example, when the first loop pattern of the second coil part 112 has one inner turn (which means 'number of turns'), it is optimal for wireless charging efficiency and / or NFC recognition rate efficiency It can be a number condition.

In other words, when the first loop pattern of the second coil portion 112 has one inner turn, it is possible to improve the wireless charging efficiency and / or the NFC recognition efficiency by satisfying the Rspecificity and / or Qspecificity .

On the other hand, an example of one internal turn is shown in FIG. 1, and an example of two internal turns is shown in FIG. The one internal turn of FIG. 1 is superior to the two internal turns of FIG. 2 in terms of effectiveness.

In one embodiment, the charging antenna 120 is provided between the first coil part 111 and the second coil part 112 of the NFC antenna 110 to satisfy all of the antenna standards recommended in the WPC and PMA standards. As shown in FIG.

To this end, the charging antenna 120 may include an induction coil part 121 having at least one second loop pattern and a coil rim part 122 forming an inner rim of the induction coil part 121.

For example, the second loop pattern of the induction coil part 121 may have a substantially circular spiral pattern structure. The second loop pattern may have a substantially circular spiral pattern structure.

The coil rim 122 may have a size such that it is larger than the inner circle when the induction coil portion 121 is circular and sufficiently large enough to cover the induction coil portion 121 from the lower portion to be larger than the outer circle.

For example, the coil rim portion 122 may form an outer rim protruding from the circular outer side of the induction coil portion 121 and form an inner rim protruding from the circular inner side of the induction coil portion 121.

The NFC antenna 110 according to an embodiment may further include a coil connection part 113 connected between one side of the inner surface of the first coil part 111 and one side of the outer surface of the second coil part 112 .

The first coil part 111 and the second coil part 112 are electrically connected to each other so that the first coil part 111 and the second coil part 112, By further activating the magnetic field AC between the portions 121, the NFC recognition rate can be increased and the charging efficiency can be improved.

Furthermore, in order to further improve the NFC recognition rate and the charging efficiency, the second coil portion 112 and the inner rim portion of the coil rim portion 122 are connected to each other by the R (resistance) specification defined in the standard of WPC and / or PMA (Hereinafter also referred to as an &quot; inner turn interval &quot;) may be determined within a range satisfying the Q (quilty factor) and / or Q (quilty factor) specifications.

For example, when the R spec. Recommended in the WPC and / or PMA standard has a range of 4 to 6 (OMEGA), or the Q-spec has a range of 23.00 to 27.00, a length of 40 to 70 mu m L).

Suitability for this will be fully explained in Figs. 4 and 5 below.

<Example of connection structure>

3 is a cross-sectional view showing a connection structure of the wireless antenna shown in FIG. The reference numerals shown in Fig. 3 exemplify the same structure including the reference numerals of Fig. 1 described above.

Referring to FIG. 3, the wireless antenna 100 according to an exemplary embodiment may include a connection structure of the NFC antenna 110 and a connection structure of the charge antenna 120 in terms of a connection structure.

The connection structure of the NFC antenna 110 further includes an end terminal portion 114 extending from one side of the inner surface of the first coil portion 111 and forming a first end of the first coil portion 111, 112 may include a second end terminal 115 formed at the end thereof by being wound the number of times of the internal turn.

The termination terminal portion 114 is spaced apart from the second coil portion 112 and is connected to the first coil portion 111 and the second coil portion 112. The termination terminal portion 114 is connected to one end of the first coil portion 111 and the other end of the second coil portion 112, As shown in Fig.

In this case, the second terminal terminal 115 can be electrically contacted with the terminal terminal portion 114. With such a structure, it is possible to enhance the NFC recognition rate and improve the charging efficiency.

In addition, the connection structure of the NFC antenna 110 may further include an inner connection terminal 116 formed at the other inner end of the last helical first loop pattern formed on the inner surface of the first coil section 111.

The connection terminal 116 may be electrically contacted from the connection terminal 117 formed at the outer end of the first coil section 111. [

In one embodiment, the connection structure of the charging antenna 120 is electrically connected to the battery (not shown) to transmit the power generated through the magnetic induction type magnetic field generated with the NFC antenna 110 to the battery And a connection terminal 123 connected to the terminal.

The connection terminal 123 of the charging antenna 120 may be formed in a direction transverse to the spiral second loop pattern.

However, the present invention is not limited thereto, and may be variously positioned depending on the internal structure of a target object (e.g., mobile terminal, wearable device, etc.) equipped with the wireless antenna 100. It is needless to say that the connection structure of the NFC antenna 110 may have various contact structures depending on the interior or shape of the object.

On the other hand, the wireless antenna 100 described above can be formed (printed) on the flexible circuit board 101. In this case, each of the connection structures of the wireless antenna 100 can be electrically connected to the connector 102 formed on the flexible circuit board 101. The connector 102 may be electrically connected to an NFC chip or the like inside the object.

&Lt; Comparative Example 1 &

FIG. 4 is a graph showing comparison of R specs versus internal turn intervals according to the number of internal turns of FIGS. 1 and 2. FIG.

Referring to FIG. 4, when the number of internal turns is 0, the R spec having an average internal turn interval of 40 to 70 μm corresponding to 3 to 4 (Ω) Has an R spectral value of 4 to 6 (OMEGA) corresponding to 40 to 70 mu m determined by an internal turn interval.

On the other hand, when the number of internal turns is two, it can be seen that R spec has a value ranging from 6 to 8 (OMEGA) corresponding to 40 to 70 mu m determined by the optimum internal turn interval.

Here, the R spec. Recommended in the WPC and / or PMA standards should have a value of 6 to 8 (OMEGA). Therefore, when the internal turn interval specification of 40 to 70 mu m and the one internal turn specification within this range are satisfied The NFC recognition rate is increased, and the charging efficiency can be improved.

It can be seen that this improvement results from the structure of the NFC antenna 110 described in FIGS. 1 and 2, as well as the internal turn interval specifications and one internal turn specification described above of 40 to 70 占 퐉.

In the case of the internal turn interval and the internal turn interval of the other two types, the NFC recognition rate and the charging efficiency were inferior due to the failure to satisfy the R specification recommended by the WPC and / or PMA standards.

&Lt; Comparative Example 2 &

FIG. 5 is a graph showing the results of comparing the Q specs with respect to the internal turn intervals of FIGS. 1 and 2. FIG.

Referring to FIG. 5, when there are two internal turns, the Q specs corresponding to 40 to 70 mu m determined to be the optimum internal turn intervals are 17 to 22, and when the number of internal turns is optimal, And has Q spectra of 23 to 27 corresponding to 40 to 70 mu m determined at intervals.

On the other hand, when the number of inner turns is 0, it is found that the Q spec of 30 to 33 corresponds to 40 to 70 mu m determined by the optimum inner turn interval.

Here, since the Q spec. Recommended in the WPC and / or PMA standard should have a value of 23 to 27, when the internal turn interval specification of 40 to 70 占 퐉 and the one internal turn specification within this range are satisfied, And the charging efficiency could be improved.

In the case of the inner turn interval and the internal turn interval of the other two types, the NFC recognition rate and the charging efficiency were inferior due to failing to satisfy the Q specification recommended by the WPC and / or PMA standards.

<Example of wireless terminal>

6 is a schematic diagram schematically illustrating an example of a wireless terminal to which the wireless antenna of FIG. 1 is applied.

6, a wireless terminal 1000 according to an exemplary embodiment includes a wireless antenna 100, a flexible printed circuit board (FPCB) 200, a battery 300, and an NFC chip 400. Referring to FIG. Since the wireless antenna 100 has been fully described in FIGS. 1 to 5, its description is omitted, but the same applies to the present embodiment.

First, the flexible circuit board 200 is disposed in one direction inside the wireless terminal 1000 to form loop patterns of the wireless antenna 100. The flexible circuit board 200 may be mounted in a battery pack.

The battery 300 serves to charge the power transmitted from the wireless antenna 100. The battery 300 may be a removable battery or a fixed battery.

Finally, the NFC chip 400 supplies power to the NFC antenna 110 to transmit and receive communication data from the NFC antenna. The NFC chip 400 may include at least one of a tag or a reader.

For example, when an external device (not shown) performing NFC local communication with the wireless terminal 100 is a reader, the NFC chip 400 can operate as a tag. When the external device is operated as a tag, the NFC chip 400 may operate as a reader. However, the NFC chip 400 may be operated on both the tag and the reader.

Accordingly, the NFC chip 400 can read the data recorded in the tag and / or the reader.

Meanwhile, the wireless terminal 1000 described in the present embodiment may be applied to a mobile terminal capable of receiving various Internet services through NFC communication and capable of charging wirelessly while carrying.

However, the present invention is not limited to this, and if it is a wireless device requiring wireless charging and NFC communication at the same time, it may be said to be the same as or included in the category of the wireless terminal in this embodiment. For example, it can be a portable wireless device such as a wearable device, MP3, as well as a large wireless device such as a car radio.

&Lt; Another Example of Wireless Terminal >

FIG. 7 is a schematic diagram schematically showing another example of a wireless terminal to which the wireless antenna of FIG. 1 is applied.

Referring to FIG. 7, a wireless terminal 1000 according to an exemplary embodiment includes a wireless antenna 100 that simultaneously supports wireless charging and NFC communication, a flexible circuit board 500 (FPCB) for mounting the wireless antenna 100, A battery 300 that charges power generated by the wireless antenna 100 and an NFC chip that transmits and receives communication data from the NFC antenna 110 by supplying power to the NFC antenna 110 of the wireless antenna 100. [ (400).

The flexible circuit board 500 may be identical in function to the structure of the flexible circuit board 200 described with reference to FIG. 6, but may be formed on two sides along the bent portion 1001 of the wireless terminal 1000, And may be divided into an upper surface 1002 and a back surface 1003 of the terminal 1000. [

A part of the flexible circuit board 500 and the wireless antenna 100 are disposed on the upper surface 1002 of the wireless terminal 1000 and the remaining flexible circuit board 500 and wireless The antenna 100 may be disposed.

However, the above-described bending and disposing positions of the wireless antenna 100 are merely examples, and the wireless antenna 100 may be arranged in a bent state.

The reason why the wireless terminal 1000 is arranged as described above is that it is easily applied to a compact wireless terminal 1000 or a compact wireless terminal such as a flexible wireless terminal 1000. [

Thus, in the present embodiment, the wireless antenna 100 is bent and arranged on a plurality of surfaces, so that the applicability can be increased to be applied to various wireless terminals.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the exemplary embodiments or constructions. You can understand that you can do it. The embodiments described above are therefore to be considered in all respects as illustrative and not restrictive.

100: Wireless antenna 110: NFC antenna
111: first coil part 112: second coil part
113: coil connection part 114: terminal terminal part
120: Charging antenna 121: Induction coil part
122: coil rim 200: flexible circuit board
300: Battery 400: NFC chip
1000: Wireless terminal

Claims (25)

A wireless communication antenna including a first wireless communication coil part and a second wireless communication coil part; And
A wireless charging antenna including a wireless charging coil portion,
Wherein the wireless charging coil unit is disposed inside the first wireless communication coil part,
And the second wireless communication coil unit is disposed inside the wireless charging coil unit. The method according to claim 1,
Wherein the first wireless communication coil part and the second wireless communication coil part have different forms. 3. The method of claim 2,
Wherein the first wireless communication coil portion includes a rectangular shape,
Wherein the second wireless communication coil portion includes a circular shape. The method according to claim 1,
Wherein the first wireless communication coil part and the second wireless communication coil part have different curvatures. 5. The method of claim 4,
Wherein the wireless charging coil unit and the second wireless communication coil unit have a corresponding curvature. The method according to claim 1,
Wherein the first wireless communication coil part and the second wireless communication coil part have different winding counts. The method according to claim 6,
Wherein the number of times the second wireless communication coil part is wound is one time. The method according to claim 6,
Wherein the number of turns of the first wireless communication coil is greater than the number of turns of the second wireless communication coil. The method according to claim 6,
Wherein the number of turns of the wirelessly-charged coil section is greater than the number of turns of the first wireless communication coil section. The method according to claim 6,
Wherein the number of turns of the wireless charging coil portion is greater than the number of turns of the second wireless communication coil portion. The method according to claim 1,
Wherein the wireless communication antenna includes a coil connection portion connecting the first wireless communication coil portion and the second wireless communication coil portion. 12. The method of claim 11,
And the coil connection portion overlaps with the wireless charging coil portion. The method according to claim 1,
Wherein the first wireless communication coil unit and the second wireless communication coil unit are connected in series with each other,
Wherein the first wireless communication coil part and the second wireless communication coil part are wound so as to have the same current rotation direction. The method according to claim 1,
Wherein the wireless communication antenna and the wireless charging antenna are formed on a flexible circuit board. 15. The method of claim 14,
Wherein the flexible circuit board comprises a wireless communication antenna and a connector connected to the wireless charging antenna. 12. The method of claim 11,
And a coil rim portion in which the wireless recharging coil portion is disposed. 17. The method of claim 16,
Wherein the first wireless communication coil portion is disposed outside the coil rim portion. 17. The method of claim 16,
And the second wireless communication coil unit is disposed inside the coil rim. 17. The method of claim 16,
And the coil connection portion overlaps with the coil rim portion. 17. The method of claim 16,
Wherein an area of the coil rim portion is larger than an area of the wirelessly-charged coil portion. delete delete delete delete delete

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