KR101109764B1 - A lable tag of electromagnetic dispersion and magnetic coupling dual type - Google Patents

Abstract

The present invention relates to a label tag of the electromagnetic scattering and magnetic coupling dual system, the rectangular plate-like dielectric (10); The tag antenna 20 formed by forming an aluminum thin film on the dielectric 10 by etching, and the tag chip 30 mounted on one end of the tag antenna 20 to fuse magnetic field coupling and electromagnetic scattering. It can be recognized inside a high dielectric material and can be used in a humid area or inside or outside a liquid, and can be used in various items or places without limitation. It is a useful invention with advantages.

Electromagnetic field scattering, magnetic coupling, dual mode, label tag.

Description

Label tag of electromagnetic scattering and magnetic coupling dual type

The present invention relates to an RFID label tag, and more particularly, to allow magnetic field coupling and electromagnetic scattering to be fused to operate in a near field and a far field. The present invention relates to an externally recognizable field scattering and magnetic coupling dual label tag.

Ubiquitous refers to an information and communication environment in which a user can freely access a network regardless of a location without being aware of a network or a computer. For ubiquitous, Radio Frequency Identification (RFID) systems operate on a wide range of networks, such as the World Wide Web. RFID is a technology that aims to recognize a physical object and find out information about the object. The identification code assigned to each object is called a tag code and is encoded in an RFID tag. These codes are the basis for using information services for objects.

In general, RFID is one of Automatic Data Collection such as bar code. It consists of a transponder, a transceiver that receives signals from the outside and automatically sends them back, and a reader / controller that sends or reads these signals.

Compared to a general barcode system, the transponder is a barcode and the reader acts as a scanner. As a barcode scanner scans and reads a barcode label, an RF reader uses radio waves to transmit data. To read.

Barcodes are restricted from use because they can tear or contaminate labels, but transponders are semi-permanent in microchip form and are independent of the environment. Dirt or rain can quickly reduce the recognition rate of barcodes, but RFID is less intrusive to the environment.

Because of the use of radio frequency (RF), transponders and readers react in a non-contact manner, resulting in fast data reading. In addition, it can transmit and receive a large amount of information compared to bar codes.

It is used by many people because of its application to transportation cards, and is widely used in access control systems for company employees, residents, and visitors as it is applied to access control systems. In addition, it is applied to efficient logistics management, inventory management, and anti-theft field, which has significant productivity improvement and cost reduction effect, and has the advantage of identifying purchase, logistics, and sales in real time in connection with enterprise resource planning (ERP) system. .

1 is a conceptual diagram of a general RFID network, in which an RFID tag 1 attached to an object, a reader 2 for reading an RFID tag, and user information read through the reader 2 are sent to the server 4. It comprises a network (3) for providing, and a server (4) for receiving user information of the RFID tag (1) received through the network (3), searching and comparing with previously stored information. The reader 2 is naturally a concept including a reader antenna (not shown).

2 is a diagram illustrating a conventional RFID tag structure, in which a general RFID tag 1 is a chip 5 for storing information (data) of an object, and is connected to the chip 5 to transmit and receive data to and from a reader. And an antenna 6 for transmitting electromagnetic waves to or from the space. Such RFID tags are generally attached to wood, paper, and plastic to operate in an electromagnetic scattering manner, so that when the label tag is inside a high dielectric, it cannot be recognized.

Accordingly, since the conventional RFID tag has to use a tag having a different operation method according to the surrounding environment, there is a problem in that the use area of the label tag is limited because it cannot be used in a humid place in the air or inside or outside the liquid.

Accordingly, the present invention has been made to solve various problems caused by the above-described conventional tag, and an object of the present invention is to allow magnetic field coupling and electromagnetic field scattering to be fused and to be recognized inside a high dielectric material. Disclosure of the Invention An object of the present invention is to provide a label tag of electromagnetic scattering and magnetic coupling that can be used inside and outside of a liquid.

Another object of the present invention is to allow magnetic field coupling and electromagnetic field scattering to be recognized inside the high dielectric, so that the tag can be used in various articles or places without limitation to the article or place where the tag is used, thereby improving the usability and utility of the tag. The present invention provides a label tag with dual electromagnetic scattering and magnetic coupling.

In order to achieve the above object, the present invention provides an electromagnetic field scattering and magnetic coupling dual label tag including: a rectangular plate-shaped dielectric 10; The tag antenna 20 is formed by forming an aluminum thin film on the dielectric 10 by etching, and the tag chip 30 is mounted on one end of the tag antenna 20.

The present invention can be recognized in a high dielectric by allowing magnetic field coupling and electromagnetic scattering to be fused, and thus can be used in a variety of articles or places without being limited to the articles or places to be used while being used in a humid area or a liquid. There is a particular advantage that can improve the usability and utility of the tag.

Hereinafter, preferred embodiments of the present invention electromagnetic scattering and magnetic field coupling dual-type label tag in the accompanying drawings and preferred embodiments will be described in detail.

Figure 3 is a perspective view of a label tag of the electromagnetic field scattering and magnetic coupling dual method of the present invention, Figure 4 shows the specification of the radiation pattern according to the present invention, Figure 5 is a graph showing the measured reflection coefficient of the tag according to the present invention 6 is a graph showing the measured impedance of the tag according to the present invention, FIG. 7 is a schematic diagram of a system for measuring the sensitivity of the tag, and FIG. 8 is a frequency band of the label tag of the electromagnetic scattering and magnetic coupling of the present invention. Fig. 9 is a graph showing sensitivity measurement results compared to a commercial tag, and Fig. 9 is a schematic diagram of a system for testing a recognition distance of a tag in a near field environment, and Fig. 10 is a label tag of the electromagnetic field scattering and magnetic coupling of the present invention. A graph showing the recognition distance test results in a near field environment of a commercial tag, and FIG. 11 illustrates the recognition distance of a tag in a far field environment. 12 is a graph showing a recognition distance test result in a near field environment of an electromagnetic field scattering and a magnetic coupling dual type label tag in comparison with a commercial tag. The coupling dual label tag includes a rectangular plate-shaped dielectric 10; The tag antenna 20 is formed by forming an aluminum thin film on the dielectric 10 by etching, and the tag chip 30 mounted on one end of the tag antenna 20.

It is preferable that the dielectric 10 use PET having a thickness of 48 to 52 µm.

The tag antenna 20 is an aluminum thin film formed by etching on the dielectric 10. The tag antenna 20 has a loop pattern 11 formed at a center of an upper surface of the dielectric 10 in a 'ㅁ' shape, and the loop pattern 11. On the left and right dielectrics 10 of the meander line patterns 12 and 12 'are formed in a zigzag connection, respectively, on the left and right dielectric 10 ends of the meander line patterns 12 and 12', respectively. It consists of patch parts 13 and 13 'which are connected and formed.

The tag chip 30 is formed in a structure in which the triangle vertices of the central end of one side of the loop pattern 11 face each other, and are bonded by thermocompression bonding between the triangle vertices of both sides.

The loop pattern 11 may be formed thicker than the meander line patterns 12 and 12 'and the patch 13 and 13' to improve the recognition distance in the impedance matching and near field environments. The meander line patterns 12 and 12 'are preferably formed by reducing the size of the antenna and widening the gap so that there is no interference, and the patch parts 13 and 13' improve the recognition distance in a far field environment. For this reason, it is preferable to form an impedance real part matching of the antenna.

In addition, the numerical value shown in FIG. 4 is a numerical value abbreviate | omitted and shows the specification of each pattern.

Example 1

As an embodiment of the present invention, the label tag of the electromagnetic scattering and magnetic coupling dual method was designed as follows, and the reflection coefficient and impedance of the tag were measured by simulation.

The simulation tool is designed using CST Microstudio 2009, the chip impedance is matched to Philips' NXP chip impedance, and the tag's center frequency is 910MHz.

PET having a thickness of 50 μm is used as the dielectric 10, and the size of the outer side of the loop pattern 11 is 36 × 11.6 mm so that the pattern size of the tag antenna 20 is 79.8 × 11.6 mm. Each of 12 and 12 'is formed in a range of 16.7 x 11.6 mm on the upper surface of the dielectric 10, with an inner line spacing of 1 mm and an outer line spacing of 1.79 mm, and each of the patch portions 13 and 13' is 5.5. Forming a size of × 11.6mm to produce a label tag of the present invention electromagnetic scattering and magnetic coupling dual system.

The reflection coefficient and impedance of the produced tag were measured with a simulation tool, and the measured reflection coefficient is shown in FIG. 5 and the measured impedance is shown in FIG. 6, respectively. At this time, the reflection coefficient of the tag antenna was calculated by the chip impedance 22-j195Ω.

As shown in Fig. 5, the center frequency is 10154 MHz, and the reflection coefficient of the tag is -10.18 dB, which shows that it can be used as a good tag. The reflection coefficient is -H, which shows the frequency bandwidth (785 to 1090 Hz) at -3 dB. It can be seen that the operation is possible in all frequency bands.

In addition, the impedance is 27.20 + j173.31 Ω, as shown in FIG. 6, so that the ripple occurs due to the uneven surface of the tag antenna, but it has been found that there is no significant effect on the overall impedance change.

Example 2

In the same manner as in Example 1, 10 electromagnetic field scattering and magnetic coupling dual label tags were manufactured as samples, and sample numbers were assigned to each sample from 1 to 10, and the sensitivity of the tag was determined for each sample tag as follows. It measured in the same way.

The distance between the tag and the reader antenna is fixed to 1 m in the electromagnetic anechoic chamber shown in FIG. 7, and the sensitivity is measured while the test frequency is changed from 860 to 960 MHz by connecting a sensitivity measuring device to the reader antenna. At this time, LS Industrial System's XCODE was used as a reader antenna and Tescom's TS-2600A was used as a sensitivity measurement device.

The measurement results for each sample tag measured as described above are shown in Table 1 below.

Sensitivity measurement result by sample tag  Sample No.   One    2    3    4    5   6   7   8   9   10  Average 910 MHz
(dBm)
-13.03
-12.43
-12.73
-12.83
-12.93
-12.33
-13.23
-11.93
-13.13
-12.83
-12.74 860-960 MHz
(dBm)
-11.49
-11.15
-11.65
-11.33
-11.22
-11.72
-11.41
-11.34
-11.77
-11.73
-11.48

In addition, the sensitivity measurement for each frequency band was measured by developing a label tag of the electromagnetic field scattering and magnetic coupling dual method of the present invention using the sensitivity measurement method described above. The result is a commercial tag ("Thin Propeller" by Iminj, "Corkscrew" by RSI "," KAT2 ") is shown graphically in FIG.

As shown in FIG. 8, the developed tag, which is a label tag of the electromagnetic field scattering and magnetic coupling dual method of the present invention, has the highest sensitivity of the tag compared to the three commercial tags in the frequency band 860 to 960 MHz, and thus has a low transmission power of the reader. It was confirmed that the operation is sensitive.

Example 3

In the same manner as in Example 1, ten electromagnetic field scattering and magnetic coupling dual label tags were manufactured as samples, and the recognition distances of the tags produced in a near field environment were tested as follows.

As shown in FIG. 9, the CSL-771 of Impinj Co., Ltd. was used as a near-field reader antenna in a plastic case filled with water using the electromagnetic field scattering and magnetic coupling dual type label tag of the present invention as "NF / FF UHF RFID Tag". The recognition distance of the tag was tested for each sample in a near field environment by varying the recognition distance using the Impinj reader system "C knee 461".

The recognition distances in the near field environment for each sample tag measured as described above are shown in Table 2 below.

Recognition Distance Test Result by Sample Tag in Near Field Environment  Sample No.   One   2   3   4   5   6   7   8   9  10  Average Recognition distance (cm)  19  20  18  19  18  20  20  18  18  20   19

In addition, by using the above-described recognition distance test, a tag tag of the electromagnetic scattering and magnetic coupling dual method of the present invention is developed as a tag, and the recognition distance is tested in a near field environment. The result is a commercial tag ("Thin Propeller" manufactured by Iminj). , "Corkscrew" and "KAT2" manufactured by RSI, are shown graphically in FIG. 10.

As can be seen from Table 2 and FIG. 10, the average recognition distance of 10 sample tags of the present invention is 19 cm, and it can be seen that it can be used as a tag in a near field, and the present invention in a near field. The recognition distance of the tag (development tag) was found to be the best compared to the "Thin Propeller" product from Iminj, "Corkscrew" and "KAT2" from RSI.

Example 4

In the same manner as in Example 1, ten electromagnetic field scattering and magnetic coupling dual label tags were fabricated as samples, and the recognition distances of the tags produced in a far field environment were tested as follows.

In the electromagnetic anechoic chamber shown in Fig. 11, a tag mounted on a jig, a reader antenna, and a reader are installed, and the tag is moved to change the distance between the tag and the reader antenna, and the tag recognition distance in the far field environment is changed. Tested. In this case, Alien ALN-9600 is used as the reader antenna and Alien ALN-9800 is used as the reader.

The recognition distance in the far field environment for each sample tag measured as described above is shown in Table 3 below.

Recognition Distance Test Result by Sample Tag in Far Field Environment  Sample No.   One   2   3   4   5   6   7   8   9  10  Average Recognition distance (m)  6.0  5.9  5.9  5.8  5.8  5.9  6.0  5.9  5.8  5.9  5.9

In addition, by using the above recognition distance test, a tag tag of the electromagnetic scattering and magnetic coupling of the present invention is developed as a tag, and the recognition distance is tested in a far field environment. The result is a commercial tag ("Thin Propeller" manufactured by Iminj). , "Corkscrew", "KAT2" manufactured by RSI Corporation, is shown graphically in FIG. 12.

As can be seen from FIG. 12, the recognition distance of the development tag in the Far Field environment is 5.8m, which is about 1m or more than 4.5m of RSI's "Corkscrew" product having the highest recognition distance among commercial tags. Was improved, and the performance of the same level or higher than that of the general label tag 4 ~ 6m.

While the present invention has been described as a preferred embodiment, the present invention is not limited thereto, and various modifications can be made without departing from the gist of the invention.

1 is a conceptual diagram of a general RFID network,

2 is a view showing a conventional RFID tag structure;

Figure 3 is a perspective view of a label tag of the present invention electromagnetic scattering and magnetic field coupling dual system,

4 is a view showing the specifications of the radiation pattern according to the present invention,

5 is a graph showing a measured reflection coefficient of a tag according to the present invention;

6 is a graph showing measured impedance of a tag according to the present invention;

7 is a schematic diagram of a system for measuring the sensitivity of a tag,

8 is a graph showing the result of measuring the sensitivity measurement for each frequency band of the label tag of the electromagnetic field scattering and magnetic coupling of the present invention compared to a commercial tag,

9 is a schematic diagram of a system for testing a recognition distance of a tag in a near field environment,

FIG. 10 is a graph illustrating a recognition distance test result in a near field environment of an electromagnetic field scattering and a magnetic coupling dual type label tag of the present invention compared to a commercial tag.

11 is a schematic diagram of a system for testing the recognition distance of a tag in a Far Field environment,

FIG. 12 is a graph illustrating recognition distance test results in a near field environment of a label tag of the electromagnetic field scattering and magnetic coupling dual type of the present invention compared to a commercial tag.

<Explanation of symbols for main parts of drawing>

10: dielectric 11: loop pattern

12, 12 ': Meander line pattern 13, 13': Patch part

20: tag antenna 30: tag chip

Claims (4)

A rectangular plate-like dielectric 10; The electromagnetic field scattering and the magnetic field coupling dual method comprising a tag antenna 20 formed by etching an aluminum thin film on the dielectric 10 and a tag chip 30 mounted on one end of the tag antenna 20. A label tag; The dielectric 10 is PET with a thickness of 48 to 52 µm; The tag antenna 20 is an aluminum thin film formed by etching on the dielectric 10. The tag antenna 20 has a loop pattern 11 formed at a center of an upper surface of the dielectric 10 in a 'ㅁ' shape, and the loop pattern 11. On the left and right dielectrics 10 of the meander line patterns 12 and 12 'are formed in a zigzag connection, respectively, on the left and right dielectric 10 ends of the meander line patterns 12 and 12', respectively. Consisting of patch portions 13 and 13 'which are connected and formed; The tag chip 30 is formed in a structure in which the triangle vertices at both ends of the center of the loop pattern 11 face each other and is bonded by thermocompression bonding between the triangle vertices on both sides. Label tag. delete delete delete

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