KR20140119534A - Rfid tag applying conductive loop - Google Patents

Rfid tag applying conductive loop Download PDF

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Publication number
KR20140119534A
KR20140119534A KR1020130035337A KR20130035337A KR20140119534A KR 20140119534 A KR20140119534 A KR 20140119534A KR 1020130035337 A KR1020130035337 A KR 1020130035337A KR 20130035337 A KR20130035337 A KR 20130035337A KR 20140119534 A KR20140119534 A KR 20140119534A
Authority
KR
South Korea
Prior art keywords
antenna
rfid tag
conductive loop
loop
circuit
Prior art date
Application number
KR1020130035337A
Other languages
Korean (ko)
Inventor
류정기
Original Assignee
엘에스산전 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘에스산전 주식회사 filed Critical 엘에스산전 주식회사
Priority to KR1020130035337A priority Critical patent/KR20140119534A/en
Publication of KR20140119534A publication Critical patent/KR20140119534A/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G06K19/0775—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card arrangements for connecting the integrated circuit to the antenna
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
    • G06K19/07773—Antenna details
    • G06K19/07777—Antenna details the antenna being of the inductive type
    • G06K19/07779—Antenna details the antenna being of the inductive type the inductive antenna being a coil

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)

Abstract

The present specification relates to an RFID tag to which a conductive loop is applied. The conductive loop is separated by a predetermined distance from a circuit unit and a built-in antenna formed in the RFID. Therefore, the RFID tag according to the present specification includes: the circuit unit provided in a first part of one side of a substrate; an antenna unit provided in a second part of one side of the substrate; and a conductive loop formed in the shape of a closed loop in the outer portions of the circuit portion and the antenna.

Description

[0001] RFID TAG APPLICATION CONDUCTIVE LOOP WITH CONDUCTIVE LOOP [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an RFID tag to which a conductive loop is applied, and more particularly to a RFID tag to which a conductive loop is applied to form a circuit loop formed by a predetermined distance from a built-in antenna and a circuit portion formed in the RFID tag.

2. Description of the Related Art Generally, an RFID system (Radio Frequency Identification System) includes an RFID tag attached to an object and transmitting its own unique identification information as a radio signal, an RFID And a reader.

In the RFID tag, the recognition performance varies greatly depending on the material of the attachment to which the RFID tag is attached, and various types of tags corresponding to the attachment material are required.

That is, in the RFID tag, the input impedance of the designed RFID tag antenna is changed by the permittivity of the attachment material of the attachment, and conjugate matching condition for supplying the maximum energy to the tag chip is broken.

Korean Patent Application No. 10-2009-0053239

SUMMARY OF THE INVENTION An object of the present invention is to provide an RFID tag using a conductive loop that forms a conductive loop of a predetermined size spaced apart from a circuit portion and a built-in antenna at regular intervals.

It is another object of the present invention to provide an RFID tag to which a conductive loop for adjusting the directivity of an antenna radiation pattern is applied.

It is another object of the present invention to provide an RFID tag to which a conductive loop for adjusting impedance of an antenna of an RFID tag is applied.

An RFID tag to which a conductive loop according to an embodiment of the present invention is applied includes a circuit part provided on a first portion of one side of a substrate; An antenna unit provided on a second portion of one side of the substrate; And a conductive loop formed in the form of a closed loop on an outer periphery of the circuit portion and the antenna portion.

In one embodiment of the present invention, the conductive loop may be spaced apart from the circuit unit and the antenna unit by a predetermined distance.

As one example related to the present specification, the predetermined distance may range from 40 mu m to 3 mm.

As an example related to the present specification, the inductance of the conductive loop may be formed to coincide with the capacitance value of the tag chip.

In one example associated with this disclosure, the conductive loop may be a circular or polygonal conductive loop.

According to an embodiment of the present invention, the circuit unit is connected to the antenna unit, and can transmit unique identification information stored in the circuit unit to an external RFID reader based on a signal received through the antenna unit.

As an example related to the present specification, the antenna unit may cancel the current distribution of the vertical component to each other, and the current distribution of the horizontal component may be a rectangular loop antenna of one wavelength that acts as a component of the kitchen radiator characteristic.

As an example related to the present specification, the antenna unit may be any one of an inverted F antenna, a modified monopole antenna, a micro-stream antenna, or an array antenna.

The RFID tag to which the conductive loop according to the embodiment of the present invention is applied has a conductive loop of a predetermined size spaced apart from the circuit portion and the built-in antenna at a predetermined interval, And the impedance of the antenna can be adjusted.

In addition, the RFID tag to which the conductive loop according to the embodiment of the present invention is applied can adjust / improve the directivity of the antenna radiation pattern by adjusting the distance between the circuit portion, the built-in antenna and the conductive loop.

1 is a block diagram showing a configuration of an RFID tag according to an embodiment of the present invention.
2 is a configuration diagram of an RFID tag according to an embodiment of the present invention.
FIG. 3 is a graph showing changes in antenna impedance with and without a conductive loop according to an embodiment of the present invention. FIG.
4 is a Smith chart with and without a conductive loop according to an embodiment of the present disclosure;

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

1 is a block diagram showing a configuration of an RFID tag 10 according to an embodiment of the present invention.

As shown in Fig. 1, the RFID tag 10 is composed of an antenna section 100, a circuit section 200, and a conductive loop 300. Not all the components of the RFID tag 10 shown in Fig. 1 are essential components, and the RFID tag 10 may be implemented by more components than the components shown in Fig. 1, The RFID tag 10 may be implemented.

The antenna unit 100 transmits and receives signals to and from an external RFID reader.

2, the antenna unit 100 is located at a first predetermined position on one side of the substrate 400 included in the RFID tag 10, and is configured using a printing method .

Also, the antenna unit 100 may be constructed using a metal conductor plate that can be attached to a structure.

Also, the antenna unit 100 may be constructed by fusing a metal body to a structure of a SMT (surface mounting technology) type, a ceramic type, or a plastic material.

In addition, the antenna unit 100 uses a loop antenna of one wavelength, and the wavelength of the loop antenna to be used can be variously selected according to the user's selection. Here, the loop antenna having the above-mentioned wavelength can be designed by deforming the loop into a polygonal shape including a quadrangle, a circle, and a rhombus. At this time, the loop antenna of the above-mentioned wavelength cancels out the current distribution of the vertical component, and the current distribution of the horizontal component acts as a component of the kitchen knife characteristic.

When the RFID tag with the loop antenna is attached to an arbitrary attachment on the basis of the current distribution of the loop antenna as described above, a radio wave or a signal radiated or transmitted from the RFID tag on any side of the attachment Can be received through an RFID reader. The electric field intensity of the loop antenna built in the RFID tag 10 may be arbitrarily set by the user depending on the use of the RFID tag 10.

In addition, the antenna unit 100 may be formed so as to reduce the circumference length of the loop as a whole by forming a plurality of coils on one side of the loop antenna of one wavelength, as a meander line. As such, the antenna unit 100 may be formed of a built-in antenna in the RFID tag 10 by forming the coils constituting the loop antenna into a plurality of minder lines.

Also, the antenna unit 100 may have a structure in which a plurality of dipole antennas are connected in parallel.

Also, the antenna unit 100 may be used in active RFID tags or passive RFID tags using center frequencies of 13.56 MHz, 433 MHz, and 900 MHz.

In addition to the loop antenna, the antenna unit 100 may include an inverted F antenna, a modified monopole antenna, a microstrip antenna, or an array antenna, When antennas are used, the antennas used are built in the RFID tag.

Also, the antenna unit 100 receives a signal radiated or transmitted from the RFID reader.

2, the circuit unit 200 is located at a second predetermined position on one side of the substrate 400 included in the RFID tag 10, and is connected to the antenna unit 100 .

The circuit unit 200 drives the RFID tag 10 based on a signal radiated or transmitted from the RFID reader received through the antenna unit 100.

In addition, the circuit unit 200 performs predetermined signal processing on the unique identification information stored in the circuit unit 200 based on the received radiation or transmitted signal, and outputs a signal including the signal- And transmits it to the RFID reader through the antenna unit 100.

The conductive loop 300 is formed in a closed loop shape on the outer sides of the antenna unit 100 and the circuit unit 200.

2, the conductive loop 300 is spaced apart from the antenna unit 100 formed on the substrate 400 by a predetermined distance (or an interval) with respect to the circuit unit 200, .

The conductive loop 300 coincides the inductance of the conductive loop 300 with the capacitance value of the RFID tag 10 (or the tag chip).

The conductive loop 300 is spaced apart from the antenna part 100 and / or the circuit part 200 by a distance (or an interval) in the range of 40 μm to 3 mm.

Also, the conductive loop 300 is formed (or designed) in the form of a polygon including a quadrangle, a circle, and a rhombus.

FIG. 3 is a graph showing the impedance change of the antenna unit 100 with and without the conductive loop 300, and FIG. 4 is a graph showing impedance changes with and without the conductive loop 300 Smith Chart).

3 and 4, the conductive loop 300 is spaced apart from the antenna unit 100 by a distance corresponding to the distance from the antenna unit 100 and the circuit unit 200, and a stable impedance Lt; / RTI >

The RFID tag 10 includes the antenna unit 100, the circuit unit 200 and the conductive loop 300. The RFID tag 10 includes a tag chip chip ).

In addition, the tag chip is configured to facilitate removal / attachment of an attachment such as a logistics.

Although the antenna unit 100, the circuit unit 200 and the conductive loop 300 are formed on the same layer on the substrate 400 in the embodiment of the present invention, The circuit part 200 may be formed in another layer, the conductive loop 300 may be formed in another layer, and the layers may be sequentially formed to form the RFID tag 10.

As described above, in the embodiment of the present invention, the conductive loop having a predetermined size spaced apart from the circuit unit and the built-in antenna at predetermined intervals is formed, thereby reducing the variation in recognition performance depending on the material to which the RFID tag is attached, Impedance can be adjusted.

Also, as described above, the embodiment of the present invention can adjust / improve the directivity of the antenna radiation pattern by adjusting the distance between the circuit part, the built-in antenna and the conductive loop.

The present invention may be embodied in many other specific forms without departing from the spirit or essential characteristics thereof. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas falling within the scope of the same shall be construed as falling within the scope of the present invention.

10: RFID tag 100: antenna part
200: circuit part 300: conductive loop
400: substrate

Claims (6)

A circuit portion provided on a first portion of one side of the substrate;
An antenna unit provided on a second portion of one side of the substrate; And
And a conductive loop formed in a closed loop shape on an outer periphery of the circuit part and the antenna part. 2. The device of claim 1,
The RFID tag is spaced apart from the circuit unit and the antenna unit by a predetermined distance. 3. The method according to claim 2,
And the thickness of the RFID tag is in the range of 40 to 3 mm. The method of claim 1, wherein the inductance of the conductive loop
And the capacitance value of the tag chip is equal to the capacitance value of the tag chip. 2. The device of claim 1,
Wherein the conductive loop is a circular or polygonal conductive loop. The antenna apparatus according to claim 1,
Wherein the current distribution of the vertical component is offset from the current distribution of the vertical component, and the current distribution of the horizontal component is a square loop antenna of one wavelength acting as a component of the kitchen yarn characteristic.
KR1020130035337A 2013-04-01 2013-04-01 Rfid tag applying conductive loop KR20140119534A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020130035337A KR20140119534A (en) 2013-04-01 2013-04-01 Rfid tag applying conductive loop

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020130035337A KR20140119534A (en) 2013-04-01 2013-04-01 Rfid tag applying conductive loop

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020024232A1 (en) * 2018-08-02 2020-02-06 Nokia Shanghai Bell Co., Ltd. Antenna and wireless communication device
WO2023020850A1 (en) * 2021-08-19 2023-02-23 Continental Automotive Gmbh Device for detecting an approach
WO2023021114A1 (en) * 2021-08-19 2023-02-23 Continental Automotive Gmbh Approach detection device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020024232A1 (en) * 2018-08-02 2020-02-06 Nokia Shanghai Bell Co., Ltd. Antenna and wireless communication device
US11923622B2 (en) 2018-08-02 2024-03-05 Nokia Solutions And Networks Oy Antenna and wireless communication device
WO2023020850A1 (en) * 2021-08-19 2023-02-23 Continental Automotive Gmbh Device for detecting an approach
WO2023021114A1 (en) * 2021-08-19 2023-02-23 Continental Automotive Gmbh Approach detection device
FR3126276A1 (en) * 2021-08-19 2023-02-24 Continental Automotive Approach detection device

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