KR20240027525A - Antenna module - Google Patents

Abstract

The antenna module of the present invention includes a base material that has a flat shape and includes a first area on one side and a second area disposed on the other side of the first area; and a first antenna coil and a second antenna coil disposed on at least one surface of the substrate, wherein the first antenna coil is disposed over the first area and the second area, and the second antenna coil is disposed over the first area and the second area. an antenna coil portion disposed in area 2 and disposed inside the first antenna coil; a first magnetic sheet provided on one of the upper and lower portions of the first region of the substrate and covering a first antenna coil provided in the first region; and a first antenna coil provided in the second region and a second magnetic material sheet covering the second antenna coil, provided on the other of the upper and lower portions of the second region of the substrate, wherein the first antenna The inner end of the coil and the outer end of the second antenna coil may be electrically connected.

Description

Antenna module{ANTENNA MODULE}

The present invention relates to an antenna module.

With the advancement of technology, portable terminals such as mobile phones, PDAs, PMPs, navigation, laptops, etc. are equipped with functions such as DMB, wireless Internet, and short-distance communication between devices in addition to basic functions such as calls, video/music playback, and directions. Additional features are provided. Accordingly, the mobile terminal is equipped with a plurality of antennas for wireless communication, such as wireless Internet and Bluetooth.

In addition, there is a recent trend to apply functions such as information exchange between terminals, payment, ticket reservation, and search to mobile terminals using short-distance communication (i.e., NFC, Near Field Communication). For this purpose, the mobile terminal is equipped with an antenna module (i.e., NFC antenna module) used for short-distance communication. At this time, the NFC antenna module used is one of the electronic tags (RFID) and is a non-contact short-range wireless communication module that uses a frequency band of approximately 13.56 MHz and can transmit data between devices at a short distance of approximately 10 cm. NFC is widely used not only for payments, but also for transmitting product information or travel information for visitors in supermarkets or general stores, transportation, and access control locks.

Meanwhile, as miniaturization and thinning are required in the portable terminal market, the size and thickness of portable terminals are decreasing, leading to a decrease in the mounting space for internal components. In particular, in the case of smart watches, the use of NFC was extremely limited as it was difficult to secure a magnetic field due to the presence of electromagnetic wave shielding metal inside and a magnetic material on the display panel.

The present invention was created to solve the problems of the prior art as described above. One purpose of the present invention is to provide an antenna module that enhances the focusing power of magnetic flux by implementing a three-dimensional antenna in the shape of a solenoid on a plane. .

An antenna module according to an aspect of the present invention includes a base material having a flat shape and including a first area on one side and a second area disposed on the other side of the first area; and a first antenna coil and a second antenna coil disposed on at least one surface of the substrate, wherein the first antenna coil is disposed over the first area and the second area, and the second antenna coil is disposed over the first area and the second area. an antenna coil portion disposed in area 2 and disposed inside the first antenna coil; a first magnetic sheet provided on one of the upper and lower portions of the first region of the substrate and covering a first antenna coil provided in the first region; and a first antenna coil provided in the second region and a second magnetic material sheet covering the second antenna coil, provided on the other of the upper and lower portions of the second region of the substrate, wherein the first antenna The inner end of the coil and the outer end of the second antenna coil may be electrically connected.

In one embodiment of the present invention, at least a portion of the first magnetic sheet and the second magnetic sheet may overlap each other in a plane view.

In one embodiment of the present invention, the first magnetic sheet may include a first protrusion and a second protrusion extending from both sides in the direction of the second magnetic sheet.

In one embodiment of the present invention, in the first magnetic sheet, at least the first protrusion and the second protrusion may overlap the second magnetic sheet.

In one embodiment of the present invention, the antenna coil unit forms an NFC coil, and the NFC coil includes a first NFC coil formed by the first antenna coil; And it may include a second NFC coil formed by the second antenna coil.

In one embodiment of the present invention, the first NFC coil is disposed outside the second NFC coil, and the current flow direction in the first NFC coil and the current flow direction in the second NFC coil may be the same. You can.

In one embodiment of the present invention, the magnetic field generated by the first NFC coil and the magnetic field generated by the second NFC coil may be combined to form an enhanced magnetic field.

In one embodiment of the present invention, the first magnetic sheet is disposed on an upper portion of the first region of the substrate, and the second magnetic sheet is disposed on a lower portion of the second region of the substrate, whereby the NFC The coil may form a planar solenoid antenna.

In one embodiment of the present invention, both the first NFC coil and the second NFC coil may form a planar solenoid antenna.

An antenna module according to an aspect of the present invention includes a base material having a flat shape and including a first area on one side and a second area disposed on the other side of the first area; and a first antenna coil and a second antenna coil disposed on at least one surface of the substrate, wherein the first antenna coil is disposed over the first area and the second area, and the second antenna coil is disposed over the first area and the second area. an antenna coil portion disposed in area 2 and disposed inside the first antenna coil; a first magnetic sheet provided on one of the upper and lower portions of the first region of the substrate and covering a first antenna coil provided in the first region; and a first antenna coil provided in the second region and a second magnetic material sheet covering the second antenna coil, provided on the other of the upper and lower portions of the second region of the substrate, wherein the first antenna The inner end of the coil and the outer end of the second antenna coil are electrically connected, the first magnetic material sheet is disposed on the upper part of the first region of the substrate, and the second magnetic material sheet is disposed on the second region of the substrate. When placed at the bottom of the area, the antenna coil can form a planar solenoid antenna.

The antenna module according to the present invention can implement a solenoid-shaped three-dimensional antenna on a magnetic material sheet. Therefore, the antenna module according to the present invention can have a high recognition rate by strengthening the focusing power of magnetic flux.

FIG. 1 is a diagram illustrating a portable communication device including an NFC antenna module and an NFC terminal capable of an NFC tag according to an embodiment of the present invention.
Figure 2 is a perspective view for explaining an antenna module according to an embodiment of the present invention.
Figure 3 is a perspective view for explaining the base of the antenna module and the antenna coil unit.
Figure 4 is a cross-sectional view taken along line II' of Figure 2.
FIG. 5 is a perspective view for explaining the first magnetic sheet shown in FIG. 2.
FIG. 6 is a perspective view for explaining the second magnetic sheet shown in FIG. 2.
FIG. 7 is a rear perspective view of the antenna module shown in FIG. 2.
FIG. 8 is a front perspective view of the antenna module shown in FIG. 2.
FIG. 9 is a diagram for explaining magnetic field enhancement of the antenna module shown in FIG. 2.

The objectives, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments taken in conjunction with the accompanying drawings. In this specification, when adding reference numbers to components in each drawing, it should be noted that identical components are given the same number as much as possible even if they are shown in different drawings. Additionally, in describing the present invention, if it is determined that a detailed description of related known technologies may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

In addition, the attached drawings are only for easy understanding of the embodiments disclosed in this specification, and the technical idea disclosed in this specification is not limited by the attached drawings, and all changes included in the spirit and technical scope of the present invention are not limited. , should be understood to include equivalents or substitutes.

Additionally, terms containing ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

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

FIG. 1 is a diagram illustrating a portable communication device including an NFC antenna module and an NFC terminal capable of an NFC tag according to an embodiment of the present invention.

Referring to FIG. 1, the NFC terminal 10 may include a body portion 11 and an NFC recognition device 12. The NFC recognition device 12 is provided within the body portion 11 and may include a magnetic head 12a and a coil portion 12b. The magnetic head 12a may be provided within the body portion 11, and the coil portion 12b may be provided in the form of a coil wound around the magnetic head 12a. Here, the NFC terminal 10 is a wireless signal receiving device, and the coil of the coil unit 12b may be a receiving coil capable of receiving a wireless signal.

When the portable communication device 20 including the NFC antenna module 21 approaches the NFC terminal 10, the NFC recognition device 12 interacts with the NFC antenna module 21 to perform an NFC tag operation. can do.

The portable communication device 20 may be a wearable device such as a smart watch. These wearable devices may be electronic devices worn on a part of the human body or fixed to a specific structure with a strap. Meanwhile, in one embodiment of the present invention, it has been described as an example that the portable communication device 20 is a wearable device, but it is not limited thereto. For example, portable communication device 20 may be a cell phone or tablet PC.

The NFC antenna module 21 is applied to the portable communication device 20 and can form a magnetic field under the control of the portable communication device 20. The NFC antenna module 21 can operate as a transmitting coil and can transmit information wirelessly by magnetically combining with the NFC terminal 10 having a coil of the coil unit 12b, which is a receiving coil.

FIG. 2 is a perspective view for explaining an antenna module according to an embodiment of the present invention, FIG. 3 is a perspective view for explaining the base of the antenna module and the antenna coil portion, and FIG. 4 is a cross-sectional view taken along line II' of FIG. 2. , FIG. 5 is a perspective view for explaining the first magnetic sheet shown in FIG. 2, FIG. 6 is a perspective view for explaining the second magnetic sheet shown in FIG. 2, and FIG. 7 is an antenna module shown in FIG. 2. is a rear perspective view, FIG. 8 is a front perspective view of the antenna module shown in FIG. 2, and FIG. 9 is a diagram for explaining magnetic field enhancement of the antenna module shown in FIG. 2.

Referring to FIGS. 2 to 9, the antenna module 100 according to an embodiment of the present invention may be mounted inside the portable communication device 20 or mounted on a portion of the outside. When the portable communication device 20 approaches the NFC terminal 10, the antenna module 100 may interact with the NFC terminal 10 to perform an NFC tag operation.

The antenna module 100 as described above may include a substrate 200, an antenna coil unit 300, a first magnetic sheet 400, and a second magnetic sheet 500.

The substrate 200 may have a flat shape. For example, the substrate 200 may have a flat plate shape or a flat sheet shape. The substrate 200 may include a first region 210 on one side and a second region 220 on the other side of the first region 210.

The antenna coil unit 300 may be provided directly on one side of the substrate 200, or on at least one side of the substrate 200 with another component such as an adhesive interposed therebetween. Hereinafter, it will be described as an example that the antenna coil unit 300 is provided on one side of the substrate 200, but the relationship between the antenna coil unit 300 and the substrate 200 is not limited to this, and the antenna coil unit 300 It may be provided on both sides of the substrate 200. In this way, when the antenna coil portion 300 is disposed on both sides of the substrate 200, the antenna coil portion 300 on both sides of the substrate 200 may be electrically connected through a via or the like.

The substrate 200 is provided as a material having heat resistance and pressure resistance. The substrate 200 may be provided as a magnetic material. That is, the substrate 200 may be provided in the form of a magnetic sheet. The magnetic sheet may be provided to efficiently form a magnetic field generated by the coil 111. For this purpose, the magnetic sheet may also be made of a material from which magnetic paths can be easily formed. The magnetic sheet may be made of a ferrite sheet. However, the magnetic sheet has magnetism and is not limited to the ferrite sheet, and may be at least one of a ferrite sheet, a soft magnetic metal sheet, and a hybrid type sheet using a combination of metal and ferrite. Additionally, it may be a thin sheet manufactured by thinning a metal thin film and dispersing and pressing it on an insulating resin. A variety of ferrite material compositions can be used, for example, Fe, Fe-Si, Fe-Al-Si, Fe-Ni, Fe-Co, etc., and if it is a magnetic material, various materials other than ferrite can be used. You can.

The substrate 200 may be made of other insulating materials. For example, the substrate 200 may be made of a polymer material. In particular, the substrate 200 may include at least one of polyimide (PI), polyethylene terephthalate (PET), and epoxy resin.

However, the material of the base 200 is not limited to this, and the base 200 may be a printed circuit board (PCB), a ceramic board, a pre-molded board, or a direct bonded copper (DBC) board. ) It may be a substrate or an insulated metal substrate (IMS), etc. However, the material of the substrate 200 is not limited to this, and various insulating materials may be used. If the substrate 200 is made of a material other than a magnetic material, a separate magnetic sheet may be additionally provided between the substrate 200 and the battery. In this case, an additional magnetic sheet can be used to efficiently form a magnetic field path and at the same time block the magnetic field path toward the battery.

In one embodiment of the present invention, the substrate 200 may be provided as rigid, but is not limited thereto. For example, the substrate 200 may be provided as flexible, that is, flexible. These rigid or flexible substrates may be provided in various forms, for example, a rigid printed circuit board, a flexible printed circuit board, or a rolled copper substrate that can be used as a lead frame.

The antenna coil unit 300 may be used as a wireless charging antenna, such as a WPC (wireless power charging) antenna, when power transmission or power reception is required, and may also be used as an information communication antenna for wireless communication of information. An antenna for information communication can be used as an antenna for MST (Magnetic Secure Transmission) when magnetic information must be transmitted wirelessly. To this end, at least a portion of the antenna coil unit 300 can be used as both an antenna for wireless charging and an antenna for information communication.

The antenna coil unit 300 may be provided in the form of a wire on at least one side of the substrate 200. That is, the antenna coil unit 300 may be provided on at least one side of the substrate 200 on a plane formed by one side of the substrate 200. The antenna coil unit 300 is one of a first antenna coil 310 and a second antenna coil 320 provided in a spiral shape, and a first antenna coil 310 and a second antenna coil 320 in a spiral shape, For example, the first draw-out portion 311 connected to the outer end of the first antenna coil 310, and the other one of the first antenna coil 310 and the second antenna coil 320, for example, the second antenna coil 310. It may include a second lead-out portion 321 connected to the central end of the antenna coil 310.

A signal is input to the antenna coil unit 300 through one of the first drawer 311 and the second drawer 321, for example, the first drawer 311, and the first drawer 311 And the signal may be output through another one of the second drawers 321, for example, the second drawer 321. Meanwhile, in the above, it has been described as an example that a signal is input to the antenna coil unit 300 through the first lead-out unit 311 and a signal is output through the second lead-out unit 321, but the present invention is not limited to this. For example, a signal may be input to the antenna coil unit 300 through the second drawer 321 and output through the first drawer 311.

The first lead-out part 311 and the second lead-out part 321 may be connected to the first terminal part 315 and the second terminal part 325 for electrical connection with other components (eg, circuit parts). In one embodiment of the present invention, the first terminal portion 315 and the second terminal portion 325 may be provided in the substrate 200, but the present invention is not limited thereto. For example, the first terminal portion 315 and the second terminal portion 325 may be extended and protrude from one side of the substrate 200 for electrical connection to the outside. The first terminal portion 315 and the second terminal portion 325 may include a plurality of connection terminals.

The first antenna coil 310 is disposed on at least one side of the substrate 200 and may be provided along the outer portion of the substrate 200. That is, the first antenna coil 310 may be provided over the first area 210 and the second area 220. The first antenna coil 310 may be made of a circular, oval or polygonal flat coil wound clockwise or counterclockwise. The shape of the first antenna coil 310 is not limited to the drawing, and may be in the form of a winding. The first antenna coil 310 may be formed as a single-wire coil, a Litz wire formed of multiple strands, or a coil in the form of a UEW wire (polyurethane enameled wire). In one embodiment of the present invention, the material of the above-described first antenna coil 310 is also not limited, and may be made of a material containing copper or ceramic. Types of these coils include the above-described Litz wire or UEW wire as copper coils, and multilayer ceramic condenser coils (MLCC) and low-temperature co-fired ceramic coils (LTCC) as ceramic-containing winding coil materials.

In one embodiment of the present invention, the first antenna coil 310 may be arranged in a spiral shape that rotates in one direction. Depending on the embodiment, the rotation direction of the first antenna coil 310 may be arranged to rotate spirally from the inside to the outside. The first antenna coil 310 is shown as a circular spiral shape in the drawing, but it is not limited to this, and any shape that is formed in a spiral shape and can generate resonance by rotating in the same current direction is applicable.

The second antenna coil 320 is disposed on at least one surface of the substrate 200 and may be provided inside the first antenna coil 310. Additionally, the second antenna coil 320 may be provided in one of the first area 210 and the second area 220, for example, in the second area 220.

One end of the second antenna coil 320 may be connected to one end of the first antenna coil 310. For example, the outer end of the second antenna coil 320 may be connected to the inner end of the first antenna coil 310. Accordingly, the antenna coil unit 300 including the first antenna coil 310 and the second antenna coil 320 may form one coil module. Here, the coil module forming the antenna coil unit 300 may be an NFC coil module. That is, the NFC coil module may include a first NFC coil formed by the first antenna coil 310 and a second NFC coil formed by the second antenna coil 320, and the first NFC coil is a second NFC coil. It may be placed outside the coil.

Meanwhile, in one embodiment of the present invention, the coil module formed by the antenna coil unit 300 including the first antenna coil 310 and the second antenna coil 320 is described as an NFC coil module, but is limited to this. It doesn't work. For example, the coil module formed by the antenna coil unit 300 may be a signal transmission/reception coil such as an MST coil module, or may be a wireless charging coil for transmitting/receiving power.

The second antenna coil 320 may be made of a circular, oval, or polygonal flat coil wound clockwise or counterclockwise. Preferably, the second antenna coil 320 may be wound in the same direction as the first antenna coil 310. Therefore, as shown in FIG. 8, the direction of current flow in the first antenna coil 310 and the second antenna coil 320 may be the same.

The shape of the second antenna coil 320 is not limited to the drawing, and may be in the form of a winding. The second antenna coil 320 may be formed as a single-wire coil, a Litz wire formed of multiple strands, or a coil in the form of a UEW wire (polyurethane enameled wire). In one embodiment of the present invention, the material of the above-described second antenna coil 320 is also not limited, and may be made of a material containing copper or ceramic. Types of these coils include the above-described Litz wire or UEW wire as copper coils, and multilayer ceramic condenser coils (MLCC) and low-temperature co-fired ceramic coils (LTCC) as ceramic-containing winding coil materials.

In one embodiment of the present invention, the second antenna coil 320 may be arranged in a spiral shape that rotates in one direction. Depending on the embodiment, the rotation direction of the second antenna coil 320 may be arranged to rotate spirally from the inside to the outside. The second antenna coil 320 is shown in the drawing as a circular spiral shape, but it is not limited to this, and any shape that can generate resonance by rotating in the same current direction is applicable.

The first magnetic sheet 400 may have a flat plate shape or a sheet shape. Additionally, the first magnetic sheet 400 may include two protrusions 410 and 420 that protrude from both sides of the first magnetic sheet 400 toward the second magnetic sheet 500 . For example, the first magnetic sheet 400 may include a first protrusion 410 and a second protrusion 420.

The first magnetic sheet 400 may be disposed on top of the substrate 200 on which the antenna coil unit 300 is provided and cover a portion of the substrate 200. For example, the first magnetic sheet 400 may cover the first antenna coil 310 provided in the first region 210 of the substrate 200, and the first protrusion 410 and the second protrusion 420 ) may cover a portion of the second region 220 of the substrate 200. In particular, the first protrusion 410 and the second protrusion 420 may cover a portion of the first antenna coil 310 provided in the second region 220 of the substrate 200. Accordingly, the first protrusion 410 and the second protrusion 420 may overlap the second magnetic sheet 500.

The first magnetic sheet 400 may be made of a material having heat resistance and pressure resistance. The first magnetic sheet 400 can efficiently form a magnetic path generated by the first antenna coil 310 provided in the first area 210. To this end, the first magnetic sheet 400 may be formed of a material from which magnetic paths can be easily formed. For example, the first magnetic sheet 400 may be made of a ferrite sheet. However, the first magnetic sheet 400 has magnetism and is not limited to only a ferrite sheet, and may be at least one of a ferrite sheet, a soft magnetic metal sheet, and a hybrid type sheet using a combination of metal and ferrite. It could be one. Additionally, the first magnetic sheet 400 may be a thin sheet manufactured by thinning a metal thin film and dispersing and pressing it on an insulating resin. A variety of ferrite material compositions can be used, for example, Fe, Fe-Si, Fe-Al-Si, Fe-Ni, Fe-Co, etc., and if it is a magnetic material, various materials other than ferrite can be used. You can.

An insulating film (not shown) may be provided on the surface of the first magnetic sheet 400. The insulating film may electrically insulate the antenna coil unit 300 and the first magnetic sheet 400.

The second magnetic sheet 500 may have a flat plate shape or a sheet shape.

The second magnetic sheet 500 may be disposed below the substrate 200 on which the antenna coil unit 300 is provided and cover a portion of the substrate 200. For example, the second magnetic sheet 500 may cover the first antenna coil 310 and the second antenna coil 320 provided in the second area 220 under the substrate 200.

Like the first magnetic sheet 400, the second magnetic sheet 500 may be made of a material having heat resistance and pressure resistance. The second magnetic sheet 500 can efficiently form a magnetic field path generated by the second antenna coil 320 and the first antenna coil 310 provided in the second area 220. To this end, the first magnetic sheet 400 may be formed of a material from which magnetic paths can be easily formed. For example, the second magnetic sheet 500 may be made of a ferrite sheet. However, the second magnetic sheet 500 has magnetism and is not limited to only ferrite sheets, and may be at least one of a ferrite sheet, a soft magnetic metal sheet, and a hybrid type sheet using a combination of metal and ferrite. It could be one. Additionally, the second magnetic sheet 500 may be a thin sheet manufactured by thinning a metal thin film and dispersing and pressing it on an insulating resin. A variety of ferrite material compositions can be used, for example, Fe, Fe-Si, Fe-Al-Si, Fe-Ni, Fe-Co, etc., and if it is a magnetic material, various materials other than ferrite can be used. You can.

An insulating film (not shown) may be provided on the surface of the second magnetic sheet 500. The insulating film may electrically insulate the antenna coil unit 300 and the second magnetic sheet 500.

Additionally, in a plane view, at least a portion of the second magnetic sheet 500 may overlap with the first magnetic sheet 400 . For example, one end of the second magnetic sheet 500 may extend into the first area 210 and cover a portion of the lower portion of the first area 210 .

In one embodiment of the present invention, the first magnetic sheet 400 is disposed on the top of the first region 210 of the substrate 200, and the second magnetic sheet 500 is disposed on the second region 210 of the substrate 200. As disposed below 220, the antenna coil unit 300 can form a planar solenoid antenna. In addition, both the first NFC coil formed by the first antenna coil 310 and the second NFC coil formed by the second antenna coil 320 can form a planar solenoid antenna.

That is, the antenna module 100 may be provided with two planar solenoid antennas, a first NFC coil and a second NFC coil. Here, since the first antenna coil 310 is provided outside the second antenna coil 320, the solenoid antenna based on the first NFC coil may be provided outside the solenoid antenna provided by the second NFC coil.

Therefore, as shown in FIG. 9, the magnetic field (MF1) generated from the solenoid antenna by the first NFC coil can be combined with the magnetic field (MF2) generated by the solenoid antenna by the second NFC coil to form an enhanced magnetic field. there is. That is, since the magnetic fields MF1 and MF2 generated from the two solenoids are focused, the magnetic field of the antenna module 100 according to an embodiment of the present invention can be strengthened.

As described above, the antenna module 100 according to an embodiment of the present invention includes a first NFC coil formed by the first antenna coil 310 and a second NFC coil formed by the second antenna coil 320. an NFC coil, a first magnetic sheet 400 covering the NFC coil at the top of the first area 210, and a second magnetic sheet 500 covering the NFC coil at the bottom of the second area 220. It can be included. Here, the first NFC coil is provided outside the second NFC coil, and the current flow direction in the first NFC coil and the current flow direction in the second NFC coil may be the same. Accordingly, the magnetic field of the NFC coil can be strengthened by combining the magnetic field generated by the first NFC coil and the magnetic field generated by the second NFC coil. In this way, the magnetic field of the NFC coil may be strengthened compared to the magnetic field when each of the first NFC coil and the second NFC coil exist alone.

The present invention is not limited to the embodiments described above, and may include a combination of at least two or more of the above embodiments or a combination of at least one of the above embodiments and known techniques as a new embodiment. Of course.

Although the present invention has been described in detail through specific examples, this is for the purpose of specifically explaining the present invention, and the present invention is not limited thereto, and can be understood by those skilled in the art within the technical spirit of the present invention. It would be clear that modifications and improvements are possible.

All simple modifications or changes of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be made clear by the appended claims.

10: NFC terminal 11: body part
12: NFC recognition device 12a: magnetic head
12b: Coil unit 20: Portable communication device
21: NFC antenna module 100: Antenna module
200: substrate 210: first region
220: second area 300: antenna coil unit
310: first antenna coil 311: first draw-out portion
315: first terminal portion 320: second antenna coil
321: second draw-out portion 325: second terminal portion
400: first magnetic sheet 410: first protrusion
420: second protrusion 500: second magnetic sheet

Claims (15)

A substrate having a flat shape and including a first region on one side and a second region disposed on the other side of the first region;
and a first antenna coil and a second antenna coil disposed on at least one surface of the substrate, wherein the first antenna coil is disposed over the first area and the second area, and the second antenna coil is disposed over the first area and the second area. an antenna coil portion disposed in area 2 and disposed inside the first antenna coil;
a first magnetic sheet provided on one of the upper and lower portions of the first region of the substrate and covering a first antenna coil provided in the first region; and
It is provided on the other of the upper and lower parts of the second region of the substrate, and includes a first antenna coil provided in the second region and a second magnetic material sheet covering the second antenna coil,
An antenna module in which an inner end of the first antenna coil and an outer end of the second antenna coil are electrically connected. According to claim 1,
An antenna module wherein at least a portion of the first magnetic sheet and the second magnetic sheet overlap each other in a plan view. According to clause 2,
The first magnetic sheet includes a first protrusion and a second protrusion extending from both sides in the direction of the second magnetic sheet. According to clause 3,
In the first magnetic sheet, at least the first protrusion and the second protrusion overlap the second magnetic sheet. According to clause 3,
The antenna coil unit forms an NFC coil,
The NFC coil is
A first NFC coil formed by the first antenna coil; and
An antenna module including a second NFC coil formed by the second antenna coil. According to clause 5,
The first NFC coil is disposed outside the second NFC coil,
The antenna module wherein the current flow direction in the first NFC coil and the current flow direction in the second NFC coil are the same. According to clause 6,
An antenna module in which the magnetic field generated by the first NFC coil and the magnetic field generated by the second NFC coil are combined to form an enhanced magnetic field. According to clause 5,
As the first magnetic sheet is disposed on top of the first region of the substrate and the second magnetic sheet is disposed on the bottom of the second region of the substrate, the NFC coil forms a planar solenoid antenna. antenna module. According to clause 8,
The first NFC coil and the second NFC coil are both antenna modules forming a planar solenoid antenna. A substrate having a flat shape and including a first region on one side and a second region disposed on the other side of the first region;
and a first antenna coil and a second antenna coil disposed on at least one surface of the substrate, wherein the first antenna coil is disposed over the first area and the second area, and the second antenna coil is disposed over the first area and the second area. an antenna coil portion disposed in area 2 and disposed inside the first antenna coil;
a first magnetic sheet provided on one of the upper and lower portions of the first region of the substrate and covering a first antenna coil provided in the first region; and
It is provided on the other of the upper and lower parts of the second region of the substrate, and includes a first antenna coil provided in the second region and a second magnetic material sheet covering the second antenna coil,
The inner end of the first antenna coil and the outer end of the second antenna coil are electrically connected,
As the first magnetic sheet is disposed on top of the first region of the substrate and the second magnetic sheet is disposed on the bottom of the second region of the substrate, the antenna coil forms a planar solenoid antenna. antenna module. According to claim 10,
The first antenna coil and the second antenna coil both form a planar solenoid antenna. According to claim 11,
The antenna module wherein the direction of current flow in the first antenna coil and the second antenna coil is the same. According to claim 10,
An antenna module in which the magnetic field generated by the first antenna coil and the magnetic field generated by the second antenna coil are combined to form an enhanced magnetic field. According to claim 10,
An antenna module wherein at least a portion of the first magnetic sheet and the second magnetic sheet overlap in a plane view. According to claim 14,
The first magnetic sheet includes a first protrusion and a second protrusion extending from both sides in the direction of the second magnetic sheet.