KR102825478B1 - Rfid tag for tire and structure of antenna - Google Patents

Abstract

The present invention aims to provide an RFID tag for a tire and an antenna structure of the tag that can be embedded in a tire and improves reliability by minimizing damage and detachment from the tire during the driving process of the tire.

Description

{RFID TAG FOR TIRE AND STRUCTURE OF ANTENNA}

The present invention relates to an RFID tag for a tire and an antenna structure of the tag, and more specifically, to an RFID tag for a tire and an antenna structure of the tag that improves reliability by minimizing detachment and damage from a running tire.

RFID tags store information about a product for product identification, and can be attached to the exterior of the product or its packaging box to be used for product management, etc.

In particular, RFID tags provide product information using radio frequencies, so they have a wider recognition range and are easier to recognize than barcode labels that require an optical reader. Specifically, RFID (Radio Frequency Identification System) technology is a technology that uses frequencies to identify IDs, and refers to a technology that can recognize information from a long distance using radio waves.

There is a demand to apply RFID tags inside tires to enable logistics and history management of tires during the vehicle manufacturing and transportation stages by applying this RFID technology to tires.

Typically, in the case of an RFID tag inserted inside a tire, it may be configured to include a drive IC chip that performs a data storage function and an internal antenna for transmitting this information to the outside.

These components can be embedded or attached within the tire, usually surrounded by an encapsulation material.

However, RFID tags attached or embedded in tires have limitations in that they can become detached or damaged from the tire depending on the rotational movement of the tire while driving.

Korean Registered Patent No. 10-2332843 (November 25, 2021)

The purpose of the present invention is to provide an RFID tag for a tire that can be embedded in a tire and an antenna structure of the tag.

In addition, the present invention aims to provide an RFID tag for a tire and an antenna structure of the tag with improved reliability by minimizing damage and detachment from the tire during the driving process of the tire.

An RFID tag for a tire according to one embodiment of the present invention may include an antenna portion in the shape of a plate, which is embedded in a tire and formed of a metal material, and a driving IC chip positioned at the center of the antenna portion and coupled to at least two parts of the antenna portion.

Specifically, the antenna portion includes a first extension portion formed in a direction away from a terminal to which the driving IC chip is coupled, a second extension portion formed parallel to the first extension portion and extending from one end of the first extension portion to the terminal, a third extension portion formed parallel to the first extension portion and extending from the other end of the first extension portion to the terminal, an opening formed between the first extension portion and the second and third extension portions, and a slit formed between the second extension portion and the third extension portion, and the terminal may include a first terminal, a second terminal, and a third terminal to which the driving IC chip is coupled.

In one embodiment, the first terminal may be formed to protrude from one side of the first extension portion facing the slit, the second terminal may be formed to protrude from one side of the second extension portion facing the slit to an edge of the second extension portion formed toward one side of the first extension portion, and the third terminal may be formed to protrude from one side of the third extension portion facing the slit to an edge of the third extension portion formed toward one side of the first extension portion.

In one embodiment, the first terminal is positioned between the second terminal and the third terminal, the second terminal and the third terminal face the opening, and the side of the first terminal facing the second and third terminals and the side of the second and third terminals can be spaced apart from each other by a predetermined distance.

In one embodiment, at least two of the first to third terminals may include terminal pads that couple with the driving IC chip.

In one embodiment, the antenna portion includes a first connecting portion connecting one end of the first extension portion and the second extension portion in a direction away from the slit, and a second connecting portion connecting the first extension portion and one end of the third extension portion in a direction away from the slit, and the first connecting portion and the second connecting portion may be formed thicker than the widths of the first to third extension portions.

In one embodiment, the length from the slit to the first extension may be formed longer than the length of the first connecting portion, and the length from the slit to the second extension may be formed longer than the length of the second connecting portion.

In one embodiment, the antenna portion may include a meander line extending from an end of the first connecting portion and the second connecting portion.

In one embodiment, the antenna portion may be any one of an alloy synthesized by mixing copper and zinc, titanium, and tough pitch copper (C1100).

In one embodiment, the antenna portion may have a primer applied to its surface.

In one embodiment, the driver IC chip can be coupled to the antenna unit using at least one of surface mount (SMT), die attach, wire bonding, anisotropic conductive film (ACF), and ACP.

According to one embodiment of the present invention, an antenna structure of an RFID tag for a tire includes an antenna portion that is embedded in a tire, is formed in a plate shape of a metal material, and includes a terminal capable of communication, wherein the antenna portion includes a first extension portion formed in a direction away from the terminal, a second extension portion formed from one end of the first extension portion to the terminal and parallel to the first extension portion, a third extension portion formed from the other end of the first extension portion to the terminal and parallel to the first extension portion, an opening formed between the first extension portion and the second and third extension portions, and a slit formed between the second extension portion and the third extension portion, and the terminal may include a first terminal, a second terminal, and a third terminal coupled to a driving IC chip.

In one embodiment, the first terminal may be formed to protrude from one side of the first extension portion facing the slit, the second terminal may be formed to protrude from one side of the second extension portion facing the slit to an edge of the second extension portion formed toward one side of the first extension portion, and the third terminal may be formed to protrude from one side of the third extension portion facing the slit to an edge of the third extension portion formed toward one side of the first extension portion.

The present invention enables matching of the impedance of an RFID tag for tires and an RFID driving IC chip.

Specifically, the antenna structure of an RFID tag for a tire embedded in a tire is formed in a plate shape extending in one direction parallel to the direction of the curved surface of the tire, and the driving IC chip of the RFID tag is installed at the center of the antenna section, so that an RFID reader recognizing the driving IC chip can receive tire information from any direction even while the tire is in motion. This has the advantage of improving the reliability of RFID tag recognition by the RFID reader.

Meanwhile, an opening hole is formed in the center of the antenna portion of the RFID tag for tires of the present invention to prevent pressure generated by the rotational movement of the tire from being concentrated on the antenna portion when the tire is driven.

Specifically, a hole is formed in the center surface of the antenna portion so that pressure that may be concentrated in the center of the antenna portion can be dispersed to the side of the antenna portion. In addition, a slit is formed in communication with the opening hole so that the antenna portion can flexibly bend while the tire rotates. That is, since the inner surface of the tire is curved, when the antenna portion is mounted on the inner surface of the tire, the antenna portion can be mounted so as to bend along the curve of the tire. This has the advantage of minimizing the antenna portion from being detached from the inner surface of the tire while the tire is driving.

FIG. 1 is a drawing illustrating an RFID tag for a tire according to one embodiment of the present invention.
FIG. 2 is a drawing illustrating an antenna structure of an RFID tag for a tire according to one embodiment of the present invention.
FIG. 3 is a drawing illustrating a terminal structure for coupling a driving IC chip to an antenna of an RFID tag for tires according to one embodiment of the present invention.
FIG. 4 is a drawing illustrating a structure for combining an antenna unit and a driving IC chip according to an embodiment of the present invention.
FIG. 5 is a drawing illustrating an RFID tag for a tire according to another embodiment of the present invention.

Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Regardless of the reference numerals used in the drawings, identical or similar components will be given the same reference numerals and redundant descriptions thereof will be omitted. In addition, when describing embodiments disclosed in this specification, if it is determined that a detailed description of a related known technology may obscure the gist of the embodiments disclosed in this specification, the detailed description thereof will be omitted.

Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by the terms. The terms are used only to distinguish one component from another.

Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, each step described may be performed regardless of the listed order, except in cases where it must be performed in the listed order due to a special causal relationship.

In this application, it should be understood that terms such as “comprises” or “have” are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

Hereinafter, the present invention will be described with reference to the attached drawings.

FIG. 1 is a drawing illustrating an RFID tag for a tire according to one embodiment of the present invention.

An RFID tag (10) according to one embodiment of the present invention is a device for the tire manufacturing process and post-delivery management, and such an RFID tag (10) can be embedded or inserted inside a tire. An RFID tag (10) embedded in a tire can include a drive IC chip (200) that can store information for the tire manufacturing process and post-delivery management, and an antenna unit (100) that is formed with a pattern to be connected to an RFID reader that recognizes tire information transmitted from the drive IC chip (200) and is coupled to the drive IC chip (200).

The antenna portion (100) of such an RFID tag (10) is formed of a metal material and may be formed in a plate shape. That is, the antenna portion (100) may be formed in a polygonal (e.g., square) frame structure that is formed long in one direction.

Specifically, the antenna part (100) may be an alloy composed of copper and zinc, and for example, the antenna part itself may be implemented using brass, or may be implemented by coating brass on the surface of a plate capable of implementing a tag antenna.

The antenna unit (100) of the present invention is described as an alloy synthesized by mixing copper and zinc, but may be implemented as any one of titanium and tough pitch copper (C1100) close to pure copper, in addition to the alloy mixed with copper and zinc. In addition, the antenna unit (100) of the present invention is described as an example formed in a plate-shaped structure, but as another embodiment, it may also be formed in a structure such as a metal mesh net in the form of a fabric.

In addition, the antenna unit (100) can be formed with a thickness of 0.1T to 0.3T, where the thickness T means thickness, and 10T means 10 mm (1 cm), so the thickness of the antenna unit (100) of the present invention can be said to be about 0.01 cm to 0.03 cm.

However, in the embodiment of the present invention, the thickness of the antenna part (100) is limited to 0.1T to 0.3T, but it is preferable to form it to a minimum thickness that can move depending on the flexing motion due to tire driving.

In the event that the antenna part (100) made of metal is damaged (e.g., broken) due to stress caused by continuous driving of the tire, the damaged surface may stimulate the tire, so in addition to the antenna part made of the proposed alloy material, it may also be formed with a thickness such as C1100 30 um or 50 um.

In addition, a primer may be applied to the surface of the antenna unit (100), and the primer is a material that facilitates the subsequent process performed on the surface of the antenna unit (100) so that the tag manufactured with the antenna unit (100) made of a metal material can easily adhere to the tire when inserted and mounted in the tire.

At this time, the surface of the antenna unit (100) can be sanded and plated before primer application, but primer application, sanding, plating, etc. can be changed depending on conditions.

In addition, the driving IC chip (200) may be located at the center of the antenna unit (100) and may be coupled to at least two parts of the antenna unit (100). Since the driving IC chip (200) is coupled to the antenna unit (100) at multiple locations, even if the coupling is released at the first coupling location while the tire is running, the driving IC chip (200) is coupled to the antenna unit (100) at the second coupling location, so that tire information can be transmitted to the antenna unit (100) and the transmitted tire information can be recognized by an RFID reader.

The antenna unit (100) may include terminals (112, 132, 152) to which a driving IC chip (200) is coupled, and each terminal (112, 132, 152) may include terminal pads (111, 113a, 113b, 115, 117, 119) coupled with the driving IC chip (200).

The structural features of the described terminal pads (111, 113a, 113b, 115, 117, 119) will be specifically explained with reference to FIG. 3 described below. The driving IC chip (200) can be coupled onto the antenna unit (100) using a surface mount (SMT) method, and it is preferable that the sanding operation during the surface treatment of the antenna unit (100) above not be performed on the driving IC chip (200). In addition, in one embodiment of the present invention, the driving IC chip (200) is coupled onto the antenna unit (100) using a surface mount method, but alternatively, it may be attached and coupled using a conductive board or film such as die attach, wire bonding, anisotropic conductive paste (ACP), or anisotropic conductive film (ACF).

Meanwhile, FIG. 2 is a drawing illustrating an antenna structure of an RFID tag for tires according to an embodiment of the present invention, FIG. 3 is a drawing illustrating a terminal structure for coupling a driving IC chip to an antenna of an RFID tag for tires according to an embodiment of the present invention, and FIG. 4 is a drawing illustrating a coupling structure of an antenna portion and a driving IC chip according to an embodiment of the present invention.

As described, the antenna portion (100) may be formed to be long in one direction. Specifically, the antenna portion (100) may include a terminal (112, 132, 152) to which a driving IC chip (200) is coupled, and may include a first extension portion (110) formed in a direction away from the terminal (112, 132, 152) based on the terminal (112, 132, 152), a second extension portion (130) formed parallel to the first extension portion (110) and extending from one end of the first extension portion (110) to the terminal (112, 132, 152), and a third extension portion (150) formed parallel to the first extension portion (110) and extending from the other end of the first extension portion (110) to the terminal (112, 132, 152).

At this time, an opening hole (120) may be formed between the first extension part (110) and the second and third extension parts (130, 150), and a slit (140) connected to the opening hole (120) may be formed between the second extension part (130) and the third extension part (150).

That is, the antenna portion (100) may have a hole (opening hole (120)) formed in the center of a flat frame in a square shape, and first to third extension portions (110, 130, 150) may be formed facing each other based on the opening hole (120). At this time, a slit (140) may be formed between the second and third extension portions (130, 150), so that it may be said to have an ㅁ-shaped shape with one side open.

By forming an opening hole (120) in the antenna section (100), the pressure caused by the rotational movement of the tire when the antenna section (100) is installed in the tire can be dispersed.

Specifically, when the antenna part is formed as a flat frame without a separate hole and installed in the tire, and the tire is driven, pressure due to the rotational movement of the tire may be concentrated at the center of the flat antenna part. This may cause the antenna part to detach from the inside of the tire or become damaged.

However, as in one embodiment of the present invention, if a hole (opening hole (120)) is formed in the center surface of the antenna unit (100), the pressure that may be concentrated in the center of the antenna unit (100) is dispersed to the side of the antenna unit (100), thereby preventing damage or detachment of the antenna unit (100) even while the tire is running.

In addition, the slit (140) formed between the second and third extensions (130, 150) allows the antenna unit (100) to flexibly bend while the tire rotates. That is, since the inner surface of the tire is curved, when the antenna unit (100) is mounted on the inner surface of the tire, the antenna unit (100) can be mounted to bend along the curved surface of the tire. At this time, the ends of the second extension (130) and the third extension (150) facing the slit (140) of the antenna unit (100) can be free ends, and thus, when the antenna unit (100) is mounted on the inner surface of the tire, the second extension (130) and the third extension (150) can be mounted to bend away from the slit (140) (refer to the arrows in FIG. 2), and the antenna unit (100) can be minimized from being detached from the inner surface of the tire even when the tire is driven.

Referring again to FIG. 2, the antenna unit (100) may include a first connection unit (170) connecting one end of the first extension unit (110) and the second extension unit (130) in the direction far from the slit (140), and a second connection unit (190) connecting one end of the first extension unit (110) and the third extension unit (150) in the direction far from the slit (140). As described, the antenna unit (100) may be formed in a ㅁ-shape, and the left and right sides of the ㅁ-shape may be referred to as the first connection unit (170) and the second connection unit (190).

At this time, the first and second connecting portions (170, 190) may be formed thicker than the widths of the first to third extension portions (110, 130, 150) (see D₁ and D₂ of FIG. 2). That is, since the widths of the first and second connecting portions (170, 190) are formed thicker than the widths of the first to third extension portions (110, 130, 150), the antenna portion (100) may be fixed to the inner surface of the tire. The slit (140) and the opening hole (120) enable the antenna portion (100) to bend, and prevent pressure from being concentrated on the inner surface of the antenna portion (100). However, since the contact surface between the antenna portion (100) and the inner surface of the tire is reduced, it may come off from the inner surface of the tire. To this end, the width of both sides of the antenna part (100) is maximized so that the contact surface where the antenna part (100) comes into contact with the inner surface of the tire can be maximized.

In addition, when the antenna part (100) of the RFID tag is inserted and installed inside the tire, the rubber tire is tightly bonded to the slit (140), so that the antenna part (200) implemented with a metal material can be more firmly bonded to the inside of the tire.

In addition, the area of the antenna unit (100) can be minimized by forming a slit (140) and an opening hole (120) in the antenna unit (100). That is, by minimizing the contact area of the antenna unit (200) made of metal in contact with the rubber tire, the foreign feeling inside the tire is reduced, so that the antenna unit (100) can be more firmly fixed to the inside of the tire.

At this time, the widths of the first connecting portion (170) and the second connecting portion (190) may be larger than the widths of the first to third extension portions (110, 130, 150), but the length (H₁) from the slit (140) to the first extension portion (110) may be longer than the length (H₂) of the first connecting portion (170), and similarly, the length from the slit (140) to the second extension portion (130) may also be formed to be longer than the length of the second connecting portion (190). In this way, by forming the antenna portion (100) long in the left and right directions (refer to the directional axis of FIG. 1), the tag (10) can be installed parallel to the rotational direction of the tire, and the range (area) in which the RFID reader recognizes the tag can be maximized even while the tire is running.

At this time, the lengths of the first connecting portion (170) and the second connecting portion (190) may be sufficiently increased. This is because when the lengths of the first connecting portion (170) and the second connecting portion (190) are sufficiently increased, the operating range of the RFID reader increases, thereby increasing the tag recognition distance.

Specifically, when the RFID frequency is 900 MHz, the first connecting portion (170) and the second connecting portion (190) can be formed with a width and length of about 167 mm, which is 1/2 λ, and the RFID tag reader can be implemented with a size of about 25 mm to 45 mm, but the width and length can be changed depending on conditions.

Meanwhile, referring to FIG. 3, the antenna unit (100) includes terminals (112, 132, 152) to which the driving IC chip (200) is coupled, and the terminals (112, 132, 152) can be said to be coupling positions at which the driving IC chip (200) is coupled to the antenna unit (100). Specifically, in one embodiment of the present invention, the driving IC chip (200) can be coupled to the antenna unit (100) at a first coupling position, a second coupling position, and a third coupling position, and for this purpose, the terminals (112, 132, 152) can include a first terminal (112), a second terminal (132), and a third terminal (152) to which the driving IC chip (200) is coupled.

Specifically, the first terminal (112) may be formed to protrude from one side of the first extension (110) facing the slit (140), and the second terminal (132) may be formed to protrude from one side of the second extension (130) facing the slit (140) toward one side of the first extension (110), but at an edge of the second extension (130), which is a corner area of the second extension (130). Similarly, the third terminal (152) may be formed to protrude from one side of the third extension (150) facing the slit (140) toward one side of the first extension (110), but at an edge of the third extension (150), which is a corner area of the third extension (150).

Terminal pads (111, 113a, 113b, 115, 117, 119) that are coupled with the driving IC chip (200) may be formed on the protruding first terminal (112) to third terminal (152). In the embodiment of the present invention, the terminal pads are formed on each of the first terminal (112) to third terminal (152), but alternatively, they may be formed on at least two terminals among the first terminal (112) to third terminal (152).

Specifically, the terminal pad (111) formed on the terminal (112) of the first extension portion (110) is a bonding pad (111) that fixes the driving IC chip (200) and the antenna portion (100), and the terminal pads (115, 117) formed on the terminals (132, 152) of the second extension portion (130) and the third extension portion (150) may be fixing pads (115, 117) that fix the antenna portion (100) and the driving RC chip (200).

In addition, the pads (113a, 113b) formed on the left and right sides of the bonding pad (111) but not in contact with the driving IC chip (200) may be OUT terminal pads for the IC (NXP G2iM+) VDD, and the terminal pad (119) formed between the bonding pad (111) and the fixed pads (115, 117) described above may be NC terminal pads and may serve as chip mounts.

Meanwhile, when one of the fixed pads (115, 117) formed on each of the second and third terminals (132, 152) is combined with the driving IC chip (200), the tire information stored in the driving IC chip (200) can be recognized by the RFID reader.

At this time, the first terminal (112) to the third terminal (152) may be spaced apart by a predetermined distance with the slit (140) and the opening (120) as the center. Specifically, the first terminal (112) may be positioned between the second terminal (132) and the third terminal (152) while facing the slit (140), and the second terminal (132) and the third terminal (152) may be positioned between the slit (140) and the first terminal (112). By spaced apart from the first terminal (112) and the third terminal (152) without making contact in this way, even if one of the coupling pads (220) is detached from the terminal, the other coupling pad (220) can maintain a state of being in contact with the terminal. As a result, even if the driving IC chip (200) including the tire information is partially disconnected from the antenna unit (100), the tire information can be recognized by the RFID reader through the coupled portion.

In an embodiment of the present invention, by forming the first terminal (112) to the third terminal (152) spaced apart from each other with respect to the slit (140) and the opening hole (120), even if at least one terminal is electrically disconnected from the driving IC chip (200), the other terminal maintains electrical connection with the driving IC chip (200), thereby minimizing degradation of the performance of the RFID tag.

As described above, the driving IC chip (200) can be coupled onto the antenna portion (100) using various methods, and for example, can be attached and coupled using any one of surface mounting (SMT), die attach, wire bonding, ACP, and ACF.

Specifically, the driving IC chip (200) and the antenna unit (100) may be coupled by attaching a DIE to a terminal (112) of the first extension unit (110) and bonding a wire (W) to each of the terminals (132, 152) of the second extension unit (130) and the third extension unit (150).

Meanwhile, in order to protect the attached driving IC chip (200) and DIE, epoxy may be applied on the driving IC chip (200) and DIE or EMC mold treatment may be performed.

FIG. 5 is a drawing illustrating an RFID tag for a tire according to another embodiment of the present invention.

Referring to the drawing, a meander line (180) is formed at the ends of the first and second connecting portions (170, 190) of the antenna section (100). The meander line (180) refers to an antenna formed in a pattern in which the conductor of a flat, foldable dipole antenna is folded in a zigzag shape.

According to the embodiment of the present invention described above, the first and second connecting parts (170, 190) of the antenna unit (100) are plate-shaped, so that when the tire rotates, the pressure generated by the tire rotation may be concentrated on the first and second connecting parts (170, 190), which may cause damage to the first and second connecting parts (170, 190). To prevent this, a meander line (180) is formed from the ends of the first and second connecting parts (170, 190), so that the pressure concentrated on the first and second connecting parts (170, 190) when the tire rotates may be dispersed. That is, since the connecting part itself becomes elastic by the meander line (180), the antenna unit (100) may be minimized from being broken or separated from the tire while the tire is running.

In addition, a pattern can be formed on the meander line (180). That is, information on the tire transmitted from the driving IC chip (200) can be received, and the received information on the tire can be recognized through the RFID reader.

As a pattern is formed on the meander line (180), there may be an advantage in that the RFID reader can recognize tire information at various locations. Specifically, as the meander line (180) is formed, the overall length of the antenna unit (100) is increased, so that the recognition distance at which the RFID reader recognizes the RFID tag can be improved.

The technical features disclosed in each embodiment of the present invention are not limited to that embodiment, and, unless they are mutually incompatible, the technical features disclosed in each embodiment may be combined and applied to different embodiments.

Therefore, in each embodiment, each technical feature is mainly explained, but as long as each technical feature is not incompatible with each other, it can be applied in combination with each other.

The present invention is not limited to the above-described one embodiment and the attached drawings, and various modifications and variations are possible from the viewpoint of a person having ordinary skill in the art to which the present invention pertains. Therefore, the scope of the present invention should be determined not only by the claims of this specification but also by the equivalents of these claims.

10: RFID Tag
100: RFID Tag Antenna
200: Driver IC Chip

Claims (12)

An antenna section in the shape of a plate, embedded in a tire and formed of metal material; and
A driving IC chip is included, located at the center of the antenna portion, and coupled to at least two parts of the antenna portion.
The above antenna part,
A first extension formed in a direction away from the terminal to which the above driving IC chip is coupled;
A second extension portion formed parallel to the first extension portion and extending from one end of the first extension portion to the terminal;
A third extension portion formed parallel to the first extension portion and extending from the other end of the first extension portion to the terminal;
an opening formed between the first extension portion and the second and third extension portions; and
Including a slit formed between the second extension portion and the third extension portion,
The above terminal includes a first terminal, a second terminal, and a third terminal to which the driving IC chip is coupled,
The above first terminal is formed to protrude from one side of the first extension portion facing the slit,
The second terminal is formed to protrude from one side of the second extension portion facing the slit to one side of the second extension portion facing the first extension portion,
The third terminal is formed by protruding from one side of the third extension portion facing the slit to one side of the third extension portion facing the first extension portion.
RFID tags for tires.
delete In the first paragraph,
The first terminal is positioned between the second terminal and the third terminal, and the second terminal and the third terminal face the opening hole, while the side of the first terminal facing the second and third terminals and the side of the second and third terminals are spaced apart by a predetermined distance.
RFID tags for tires.
In the first paragraph,
At least two of the first to third terminals include terminal pads that are coupled with the driving IC chip.
RFID tags for tires.
In the first paragraph,
The above antenna part,
A first connecting portion connecting one end of the first extension portion and the second extension portion in a direction distant from the slit; and
Including a second connecting portion connecting one end of the first extension portion and the third extension portion in a direction distant from the above slit,
The first connecting portion and the second connecting portion are thicker than the width of the first to third extension portions.
RFID tags for tires.
In paragraph 5,
The length from the above slit to the first extension is longer than the length of the first connecting portion,
The length from the above slit to the second extension is formed longer than the length of the second connecting portion.
RFID tags for tires.
In paragraph 5,
The antenna portion includes a meander line extending from the end of the first connecting portion and the second connecting portion.
RFID tags for tires.
In the first paragraph,
The above antenna part is made of one of an alloy synthesized by mixing copper and zinc, titanium, and tough pitch copper (C1100).
RFID tags for tires.
In the first paragraph,
The above antenna part has a primer applied to its surface,
RFID tags for tires.
In the first paragraph,
The above driving IC chip is coupled to the antenna section using at least one of surface mount (SMT), die attach, wire bonding, anisotropic conductive film (ACF), and ACP.
RFID tags for tires.
An antenna section is embedded in a tire, is formed in a metal plate shape, and includes a communication-capable terminal.
The above antenna part,
A first extension formed in a direction away from the terminal;
A second extension formed parallel to the first extension from one end of the first extension to the terminal;
A third extension portion formed parallel to the first extension portion from the other end of the first extension portion to the terminal;
an opening formed between the first extension portion and the second and third extension portions; and
Including a slit formed between the second extension portion and the third extension portion,
The above terminal includes a first terminal, a second terminal, and a third terminal that are coupled with a driving IC chip,
The above first terminal is formed to protrude from one side of the first extension portion facing the slit,
The second terminal is formed to protrude from one side of the second extension portion facing the slit to one side of the second extension portion facing the first extension portion,
The third terminal is formed by protruding from one side of the third extension portion facing the slit to one side of the third extension portion facing the first extension portion.
Antenna structure of RFID tag for tire. delete