KR20160026072A - Antenna apparatus, and electronic component and electronic device including the same - Google Patents

Abstract

According to the present invention, an antenna device includes: a core member including a support part and first and second protruding parts, placed on a surface of the support part; and a coil part wound on the core member. The core member more includes a third protruding part placed between the first and second protruding parts. The third protruding part is able to include a core groove inside. Therefore, the present invention is capable of reducing occupied area when the antenna device is embedded in a substrate.

Description

TECHNICAL FIELD [0001] The present invention relates to an antenna device, an electronic device having the antenna device,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna device, an electronic component having the antenna device, and an electronic device.

As the mobile communication field continues to evolve, the number of users who need to provide a variety of information contents or provide real-time video has increased.

Accordingly, development of technologies for high-speed data transmission and large-capacity information transmission has been continuously carried out, and in particular, it is important to develop an antenna that performs data transmission for a large-capacity information transmission desired by a user.

Meanwhile, application of Near Field Communication (NFC) technology to a portable terminal such as a smart phone, a PMP, navigation and the like enables data exchange between portable terminals, And services such as authentication are becoming available. In this case, the NF refers to a non-contact type short-range wireless communication module using a frequency band of approximately 13.56 MHz, and a separate antenna is required to use the radio signal of the frequency band.

The conventional NEFA antenna generally uses a loop pattern and is formed in a planar shape and mounted inside a battery or a cover of a portable terminal.

However, the conventional loop-shaped NF antenna has a sufficiently long loop length in order to increase the radiation efficiency. However, since the area of the NF RF antenna is also increased, space is sufficient when the antenna is mounted in the battery or the cover I can not.

Korean Patent Publication No. 2014-0025143

The present invention proposes an antenna device capable of increasing the strength of a magnetic field in order to improve the reliability of communication with an external device, and an electronic device and an electronic device having the antenna device. do.

According to a first technical aspect of the present invention, there is provided an antenna device comprising: a core member having a support portion and first and second projections disposed on one surface of the support portion; And a coil part wound on the core member; Wherein the core member further includes a third protrusion disposed between the first and second protrusions, and the third protrusion may have a core groove therein.

According to a second technical aspect of the present invention, there is provided an antenna device for transmitting and receiving data by electromagnetic induction in accordance with entrance and exit of a magnetic flux, the antenna device comprising: a core member having a plurality of cross- A coil part wound around the core member; Wherein the core member has a support portion and a plurality of projections disposed on one surface of the support portion, and one of the plurality of projections may have a core groove therein.

An electronic component having an antenna device according to a third technical aspect of the present invention includes: a printed circuit board; And an antenna device disposed on the printed circuit board through a plurality of pad portions and connected to a circuit portion located on the printed circuit board; Wherein the antenna device includes a first core portion having a first end face through which magnetic flux enters and exits, a second core portion having a second end face through which the magnetic flux enters and exits, and a second core portion disposed between the first and second core portions A core member having a third core portion; And a coil part wound on the winding member; And the third core portion may have a core groove therein.

An electronic apparatus according to a fourth technical aspect of the present invention includes: an electronic device cover; An antenna device disposed inside the cover for the electronic device; A printed circuit board having a plurality of circuit parts to which the antenna device is connected; Wherein the antenna device comprises: a core member having a support portion and first and second projected portions disposed on one surface of the support portion; And a coil part wound on the core member; Wherein the core member further includes a third protrusion disposed between the first and second protrusions, and the third protrusion may have a core groove therein.

The antenna device, the electronic device having the same, and the electronic device according to an embodiment of the present invention can reduce the area occupied by mounting the antenna device on the board by configuring the antenna device in a chip form.

Further, the strength of the magnetic field can be increased by including the through-hole in the core member, thereby improving the reliability of communication with the external device. Further, since the coil can be wound around the through-hole, the inductance can be easily adjusted by adjusting the number of windings of the coil portion, which can increase the degree of freedom of design.

On the other hand, since the substrate can be directly mounted on the substrate through the pad without an additional substrate mounting structure, the overall size can be reduced and the mounting on the substrate can be made simpler.

1 is a perspective view of an antenna device according to an embodiment of the present invention.
2 is a perspective view showing the antenna device shown in Fig. 1 at different angles.
Fig. 3 is a view for explaining the relationship between the third protrusion and the core groove in the antenna device shown in Fig. 1. Fig.
4 is a view illustrating a direction of magnetic flux in an antenna device according to an embodiment of the present invention.
5 is a view for explaining a shape of a magnetic field in an antenna device according to an embodiment of the present invention.
6 is a perspective view showing an electronic component in which the antenna device shown in Fig. 1 is mounted on a printed circuit board.
7A and 7B are perspective views illustrating an antenna device according to another embodiment of the present invention.
8 is an exploded perspective view of an electronic device according to another embodiment of the present invention.

It is to be understood that the invention is not to be limited to the disclosed embodiments, but is capable of numerous modifications, all without departing from the spirit and scope of the invention.

In addition, in the embodiments of the present invention, the structures, shapes and numerical values described as one example are merely examples for helping understanding the technical matters of the present invention, and thus the present invention is not limited thereto. But can be changed in various ways.

The embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals will be used throughout the drawings to refer to the same or like parts.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention.

Further, an antenna device and an electronic device having the antenna device according to an embodiment of the present invention will be described with reference to an NFC antenna device, but the present invention is not limited thereto.

Antenna device and electronic parts having same

1 is a perspective view of an antenna device according to an embodiment of the present invention.

Referring to FIG. 1, an antenna device according to an embodiment of the present invention may include a core member 100 and a coil portion 200 wound around the core member 100.

The core member 100 may include a support 110, a first protrusion 120, a second protrusion 130, and a third protrusion 140.

The supporting portion 110 may have a polygonal cross section so that the antenna device may be mounted on the printed circuit board 400 (see FIG. 6) so as to achieve miniaturization. In addition, Lt; RTI ID = 0.0 > and / or < / RTI >

The first to third protrusions 120, 130, and 140 may be disposed on one side of the support 110. The other surface of the supporting portion 110 may be a mounting surface mounted on the printed circuit board 400 (see FIG. 6) as described above.

The surface on which the first to third protrusions 120, 130 and 140 are disposed is defined as one surface of the support 110 and the surface mounted on the printed circuit board 400 (see FIG. 6) It is defined as the other side.

1, each of the first and second protrusions 120 and 130 is disposed at both ends of a longitudinal direction of the support portion 110, that is, a direction in which a longest one of the corners of the support portion 110 is formed. . However, the first and second protrusions 120 and 130 are not limited to the above-described positions, and may be formed at various positions as long as a flow of the magnetic flux can be formed in relation to the third protrusion 140. [

The third protrusion 140 may be disposed between the first and second protrusions 120 and 130. In addition, the third protrusion 140 may have a core groove 141 therein. The core groove 141 may have a circular shape in cross section, and may have a cylindrical shape as a whole. In addition, the radius of the core groove 141 may correspond to a predetermined ratio with the radius of the third projecting portion 140. Further, as shown in FIG. 1, the core groove 141 may be located at the center of the third projection 140.

In addition, the core groove 141 may have a different height from that of the magnetic field required - a distance from the end face of the third protrusion 140 to the support portion 110.

The third protrusion 140 is not limited to being formed at the position shown in Fig. 1 as long as the flow of magnetic flux can be formed in relation to the first and second protrusions 120 and 130. [

For example, the first to third protrusions 120 to 140 may not be arranged on the same line with respect to the support portion 110, and the heights from the support portion 110 may be the same or different from each other .

Further, the first protrusion 120 may be a '(') shape, and the second protrusion 130 may be a ')' shape. In addition, the shape of the third protrusion 140 and the core groove 141 may be cylindrical, and the cross section may be circular. However, the present invention is not limited thereto. For example, the first to third protrusions 130 may have a polygonal cross-section, and the core groove 141 may have a polygonal cross-section.

The shapes of the first and second protrusions 120 and 130 may not be identical to each other and at least one of the first and second protrusions 120 and 130 may be formed in an inclined shape .

The core member 100 is formed by mixing a material including a magnetic material such as ferrite having a predetermined permittivity and a magnetic permeability with a composite material such as ceramics to transmit and receive NF signals of a low frequency band, .

The coil portion 200 may be wound on the third protrusion 140 of the core member 100.

More specifically, the coil section 200 may be wound around the outer surface of the third protrusion 140 so as to transmit and receive a signal of 13.56 MHz band. The coil portion 200 may be electrically connected to a circuit portion including an NFC chip (not shown) of the printed circuit board 400 (see FIG. 6).

That is, the coil part 200 is formed in a cross section of each of the first to third protrusions 120, 130, and 140 so as to transmit and receive data to / from an external electronic device by electromagnetic induction, And can be wound on the protrusion 140. At this time, the external electronic device may include an antenna capable of transmitting and receiving the same frequency band signal.

Further, the metal wire of the coil portion 200 is not limited to having a circular cross-sectional shape, and may have a polygonal cross-sectional shape. The coil portion 200 may be formed of a coated wire having an insulating coating made of polyurethane resin or polyester resin on the outer circumference of a metal wire made of copper (Cu) or silver (Ag) 200 is not limited to a single wire but may be a twisted wire or two or more wires.

2 is a perspective view showing the antenna device shown in Fig. 1 at different angles.

2A and 2B, the third protrusion 140 is spaced apart from the first and second protrusions 120 and 130 by a predetermined distance to form the first and second protrusions 120, 130, respectively. The distance from the center of the first protrusion 120 to the center of the third protrusion 140 may be equal to the distance from the center of the second protrusion 130 to the center of the third protrusion 140, It is possible. That is, if there is enough space for the coil part 200 to be wound on the third protrusion 140, the distance from the third protrusion 140 to each of the first and second protrusions 120, but are not limited to those shown in a) and b).

The core member 100 may have a plurality of cross-sections through which the magnetic flux enters and exits. That is, each of the first to third protrusions 120, 130, and 140 may have a cross section that faces the surface contacting with the support portion 110, and the magnetic flux can enter and exit through the cross section.

For example, when a magnetic flux is incident from the end face of each of the first and second protrusions 120 and 130, the incident magnetic flux can be emitted through the end face of the third protrusion 140. Conversely, when a magnetic flux is incident from the end face of the third protrusion 140, the incident magnetic flux can be emitted through the cross section of each of the first and second protrusions 120 and 130. This will be described later with reference to Fig.

Referring to FIG. 2 (b), the coil part 200 wound around the core member 100 can transmit and receive data to / from an external device by electromagnetic induction in and out of the magnetic flux.

3 is a view for explaining the relationship between the third protrusion 140 and the core groove 141 in the antenna device shown in Fig.

3 (a) and 3 (b), the shape of the third protrusion 140 and the core groove 141 may be cylindrical, and the cross section may be circular. At this time, the radius of the end face of the third protrusion 140 may be represented by 'R', and the radius of the core groove 141 may be represented by 'r'.

Table 1 below shows the distance of the magnetic field according to the radius r of the core groove 141 when the radius R of the cross section of the third protrusion 140 is 1 mm. In this case, the distance of the magnetic field refers to the distance from the antenna device according to the present invention to the point where the magnetic field is 1.5 A / m in the upward direction - the direction opposite to the direction in which it is mounted on the printed circuit board.

Through-groove
Radius (mm) 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 Distance @ 1.5A / m 0.8 1.1 1.2 1.3 1.4 1.5 1.2 1.1 1.0

The radius r of the core groove 141 is 0.2 mm to 0.8 mm when the radius R of the end face of the third protrusion 140 is 1 mm, as shown in Table 1 and Figs. 3 (a) and 3 (b) mm.

That is, the ratio of the radius R of the third protrusion 140 to the radius r of the core groove may be 1: 0.2 to 0.8. In particular, referring to Table 1, it can be seen that the distance of the magnetic field increases as the radius r of the core groove 141 increases.

4 is a view illustrating a direction of magnetic flux in an antenna device according to an embodiment of the present invention.

Referring to FIG. 4A, in the antenna device according to the embodiment of the present invention, when a magnetic flux is incident from the end face of each of the first and second protrusions 120 and 130, (Not shown).

4B, when the magnetic flux is incident on the end face of the third protrusion 140, the incident magnetic flux passes through the first and second protrusions 140 120, and 130, respectively.

That is, the antenna device according to an embodiment of the present invention can form a magnetic path having an angle of 180 degrees formed by a direction in which magnetic flux is incident with respect to a direction in which magnetic flux is emitted. Accordingly, the external device using the NF and the antenna device according to the present invention can be formed facing each other to form a magnetic path, and data can be transmitted and received using bidirectional communication.

Also, in the antenna device according to an embodiment of the present invention, the same magnetic field as that of the loop antenna of the prior art can be formed by the magnetic flux entering and exiting the third protrusion 140 as well. Thus, the reliability of communication with the external device can be improved.

5 is a view for explaining a shape of a magnetic field in an antenna device according to an embodiment of the present invention.

Referring to FIG. 5, the magnetic field shape of the antenna device according to the embodiment of the present invention is formed to be close to the equilateral direction around the coil part 200. At this time, since the core groove 141 is formed in the third protrusion 140, the magnetic field formed in the core groove 141 can be concentrated on the third protrusion 140. Accordingly, the magnetic field becomes narrow in the left and right direction and can be made strong in the upward direction.

6 is a perspective view showing an electronic component in a form in which the antenna device shown in Fig. 1 is mounted on a printed circuit board 400. Fig.

6, an antenna device according to an embodiment of the present invention may be mounted on a printed circuit board 400 through a plurality of pad portions 310 (only one of which is shown in the drawing) attached to the support portion 110.

The printed circuit board 400 may be a board mounted inside a portable terminal such as a smart phone and a circuit unit having an NFC chip (not shown) may be disposed on the printed circuit board 400 have. In addition, a plurality of active elements, passive elements, integrated circuits (ICs), and the like can be mounted on the printed circuit board 400.

At this time, the antenna device according to the present invention can be electrically connected to each other by soldering in a state where a plurality of pad portions 310 are placed in contact with the printed circuit board 400.

Meanwhile, although not shown in the drawing, the antenna device according to an embodiment of the present invention may further include a molding part formed to cover the first to third protrusions 120, 130 and 140. The molding part is formed to enclose the antenna device according to an embodiment of the present invention, and thus can serve as a cover for preventing intrusion of foreign substances from the outside.

That is, the antenna device according to an embodiment of the present invention can be formed into a chip shape by forming the molding part, thereby achieving miniaturization.

7A and 7B are perspective views illustrating an antenna device according to another embodiment of the present invention.

7A and 7B, the antenna device according to another embodiment of the present invention is represented by 200 when it is wound only on the outer surface of the coil part 210 - third protrusion 140, May be wound along the inner surface of the third protrusion 140 as well as the outer surface of the third protrusion 140.

In this case, the core groove 141 may be formed so as to penetrate not only the third protrusion 140 but also the support 110. The coil part 210 extends to the inner side surface of the core groove 141 and can be formed along the mounting surface of the support part 110 through the core groove 141. [

Conventionally, the permeability and the number of turns of the coil have to be adjusted in order to adjust the inductance according to the size of the core member. However, in the case of the chip type antenna, the change in inductance is large even if the permeability increases due to the open magnetic circuit structure. There is a problem that it is not easy to control the inductance.

Therefore, the antenna device according to another embodiment of the present invention can solve the above-mentioned problem by adjusting the number of windings of the coil portion 210. That is, not only the outer surface of the third protrusion 140 but also the inner surface of the third protrusion 140 can be wound with the coil part 210, thereby facilitating the adjustment of the inductance.

That is, the number of times that the coil part 210 is wound on the third protrusion 140 can be determined according to the resonance frequency so as to be sufficient to transmit and receive a signal in the 13.56 MHz band.

Electronics

8 is an exploded perspective view of an electronic device according to another embodiment of the present invention.

1, 6 and 8, an electronic device according to another embodiment of the present invention includes an electronic device cover 20, an antenna device 10 (see FIG. 6) disposed inside the electronic device cover 20, And a printed circuit board 400 (see FIG. 6).

The electronic device cover 20 may be disposed on the inner surface or the outside of the electronic device. For example, the cover 20 for an electronic device can be an outer cover of an electronic device, and can be an inner cover for an electronic device. In the embodiment of the present invention, for example, the electronic device cover 20 is described as an outer cover, but the present invention is not limited thereto.

Meanwhile, one embodiment of the material for the electronic device cover 20 may be plastic.

The antenna device 10 includes a support 110 and first and second protrusions 120 and 130 disposed on one side of the support 110 and a first and second protrusions 120 and 130 disposed between the first and second protrusions 120 and 130. 3 protrusions 140 and a coil part 200 wound on the core member 100. The coil part 200 may be a coil part or a coil part.

The first to third protrusions 120, 130, and 140 may include a cross section through which the magnetic flux enters and exits, and its shape and position are not limited as long as the magnetic flux enters and exits.

The first to third protrusions 120, 130, and 140 and the coil section 200 are the same as those described above, and thus the description thereof will be omitted.

6) may include a circuit portion to which the antenna device 10 is connected. In particular, an NFC chip (not shown), which is electrically connected to the antenna device 10, . ≪ / RTI >

That is, the antenna device 10 may be mounted on the printed circuit board 400 (see FIG. 6) and disposed inside the cover 20 for the electronic device. For example, the antenna device 10 may be disposed on the inner surface of the cover 20 for an electronic device, or may be disposed on a battery (not shown).

The coil unit 200 (see FIG. 1) may be electrically connected to the circuit unit of the portable terminal body through a plurality of pads 310 (see FIG. 6) Is not limited to a specific position as long as it is capable of forming an electromagnetic coupling with the electromagnetic coupling.

However, if the antenna device 10 is applied as an antenna for performing NF, for example, the antenna device 10 may be disposed at a position where electromagnetic waves can enter and exit through a part of the cover 20 for the electronic device.

The present invention is not limited by the above-described embodiments and the accompanying drawings, but is intended to be limited only by the appended claims. It will be apparent to those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. something to do.

10: antenna device;
100: core member;
110: support;
120: first protrusion;
130: second projection;
140: third projection;
141: through groove;
200, 210: coil part;
310: pad portion;
400: printed circuit board;

Claims (25)

A core member having a supporting portion and first and second projecting portions disposed on one surface of the supporting portion; And
A coil part wound around the core member; Lt; / RTI >
The core member further includes a third protrusion disposed between the first and second protrusions,
And the third projection has a core groove inside.
The method according to claim 1,
And the shape of the third protrusion and the core groove is a cylindrical shape.
3. The method of claim 2,
Wherein a ratio of a radius of the third projecting end face to a radius of the core groove is 1: 0.2 to 0.8.
[2] The method according to claim 1,
0.0 > mm < / RTI >
2. The apparatus according to claim 1,
And is wound on the outer surface of the third projection.
6. The apparatus according to claim 5,
And extends to the inner surface of the third projection to be wound.
2. The apparatus of claim 1, wherein at least one of the first and second protrusions comprises:
An antenna device having a sloped cross section.
2. The apparatus of claim 1, wherein the first and second projections
Has a cross section in which magnetic flux enters and exits,
Wherein the first protrusion is in the '(') shape and the second protrusion is in the ')' shape.
1. An antenna device for transmitting and receiving data by electromagnetic induction in and out of a magnetic flux,
A core member having a plurality of cross sections through which the magnetic flux enters and exits;
A coil part wound around the core member; Lt; / RTI >
Wherein the core member has a supporting portion and a plurality of protrusions disposed on one surface of the supporting portion, wherein one of the plurality of protrusions has a core groove inside.
10. The method of claim 9,
The protrusion having the core groove in the inside and the shape of the core groove are cylindrical,
Wherein the ratio of the radius of the cross section of the protrusion having the core groove to the radius of the core groove is 1: 0.2 to 0.8.
10. The apparatus according to claim 9,
And is wound on an outer surface of a protrusion having a core groove inside.
12. The apparatus according to claim 11,
And an inner side surface of the protruding portion having a core groove is wound on the inner surface of the protruding portion.
10. The apparatus of claim 9, wherein each of the plurality of protrusions comprises:
And the distance from the support to the end face is different.
10. The method of claim 9,
A plurality of pad portions disposed on the other surface of the support portion; Further comprising:
Printed circuit board; And
An antenna device disposed on the printed circuit board via a plurality of pad portions and connected to a circuit portion located on the printed circuit board; Lt; / RTI >
The antenna device includes a first core portion having a first end face through which magnetic flux enters and exits, a second core portion having a second end face through which the magnetic flux enters and exits, and a third core portion disposed between the first and second core portions ; And a coil part wound on the winding member; / RTI >
And the third core portion has an antenna device having a core groove therein.
16. The method of claim 15,
Wherein the first core portion is of a "(" shape, the second core portion is of a ")" shape, and the third core portion is of a cylindrical shape.
17. The method according to claim 16, wherein the core groove has a cylindrical shape,
Wherein a ratio of a radius of the third core portion cross-section to a radius of the core groove is 1: 0.2 to 0.8.
16. The apparatus according to claim 15,
And an antenna device that is wound on an outer surface of the third core portion.
19. The apparatus according to claim 18,
And an antenna device extending to the inner side surface of the third core portion and being wound.
Cover for electronic equipment;
An antenna device disposed inside the cover for the electronic device; And
A printed circuit board having a plurality of circuit parts to which the antenna device is connected; / RTI >
The antenna device includes: a core member having a support portion and first and second projected portions disposed on one surface of the support portion; And a coil part wound on the core member; Lt; / RTI >
Wherein the core member further includes a third protrusion disposed between the first and second protrusions, and the third protrusion has a core groove in the inside thereof.
21. The semiconductor device according to claim 20,
An NFC chip electrically connected to the antenna device; .
21. The method of claim 20,
And the shape of the third projecting portion and the core groove is a cylindrical shape.
23. The method of claim 22,
Wherein the ratio of the radius of the third projecting end face to the radius of the core groove is 1: 0.2 to 0.8.
23. The apparatus according to claim 22,
And is wound on the outer surface of the third projection.
25. The apparatus according to claim 24,
And is extended to the inner surface of the third projection to be wound.

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