KR100686597B1 - Antenna for radio frequency identification system - Google Patents

Abstract

The present invention relates to an antenna for a radio frequency identification system, and more particularly, to read information of a radio frequency identification tag in a radio frequency identification system consisting of a tag, an antenna, and a reader. The present invention relates to an antenna for a radio frequency identification system delivered to a reader.

The antenna for a radio frequency identification system according to the present invention is connected to a plurality of constituent antennas on the chip, and can improve the directivity and efficiency, and the radio is suitable to read the information of the radio frequency identification tag in a wide width and range There is an effect that the frequency identification system is easily configured.

In the present invention, in the antenna for a radio frequency identification system that reads the tag information of the radio frequency identification system consisting of a tag, an antenna, a reader and transmits the tag information to the reader, the antenna has a plurality of antennas around one chip It is connected and provided, so that the distance from each component antenna to the chip is the same to improve the recognition distance and bandwidth to provide an antenna for a radio frequency identification system that can further increase the directivity and efficiency.

Antenna, RFID, Antenna for Radio Frequency Identification System.

Description

Antenna for radio frequency identification system

1 is a view showing a schematic configuration of an antenna for a radio frequency identification system according to the present invention;

2 is a view showing another embodiment of the present invention, Figure 2a is an embodiment when there are two configuration antennas, Figure 2b is an embodiment when four configuration antennas,

3 is an explanatory diagram schematically showing a general configuration of a radio frequency identification system;

4 is a diagram showing a schematic configuration of a conventional antenna;

<< Explanation of symbols for main part of drawing >>

10: tag 20: antenna

30: reader 40, 50, 200: chip

41, 42, 51, 52, 53, 54: construction antenna

210, 220, 230, 240, 210 ', 220', 230 ', 240': construction antenna

J1, J2, J3, J4, J5, J6, J7, J1 ', J2', J3 ': contacts

(FA): Antenna plane

The present invention relates to an antenna for a radio frequency identification system, and more particularly, to read information of a radio frequency identification tag in a radio frequency identification system consisting of a tag, an antenna, and a reader. The present invention relates to an antenna for a radio frequency identification system delivered to a reader.

RFID (radio frequency identity) (RFID) is a field of automatic recognition, such as a barcode, magnetic, IC-card, etc. is a state-of-the-art method for wirelessly recognizing information recorded using microwave or long wave. The principle of the RFID is to receive the information stored in the tag through the antenna, so that the controller can recognize and analyze the information and acquire the unique information of the article on which the tag is mounted. ㅇ Dust It is not affected by the environment such as magnetic flux, and it has a fast passage speed so that it can be recognized on the move, it can be recognized at a long distance, and it is impossible to forge by giving unique ID in the manufacturing process.

The RFID is applied to a supermarket, parking management, and the like. For example, in the case of a supermarket, when a tag having unique information is recorded on a sale item, the controller remains on the display stand using the information received through the tag. It can automatically grasp the quantity of goods, etc., and can easily collect information about the purchased goods even if the consumer does not calculate separately, it can be provided as a convenience such as payment by credit card.

Conventionally, there is an electromagnetic induction type and an electromagnetic coupling type in the radio frequency identification label, and both of them use electromagnetic waves and are in contact with a read write terminal or the like to perform communication. The RFID tag includes an antenna coil and a control unit. When the antenna coil receives a transmission signal from a read / write terminal, the RFID tag stores the power as an electric power and stores it in the capacitor, and stores the actual information in the storage unit using the power (Id). The information such as code is transmitted from the antenna coil to the reader again.

In general, radio frequency identification tags and radio frequency identification tag systems are known and widely used. For example, radio frequency identification tags are frequently used for personal identification in automated gate surveillance applications that protect security buildings or areas. The information stored in the radio frequency identification tag identifies an individual trying to enter a secured building. A radio frequency identification tag system is convenient for reading information from radio frequency identification tags over short distances using radio frequency data transmission technology. Most typically, the user only needs to place the radio frequency identification tag near a base station that transmits an excitation signal to the radio frequency identification tag power supply circuit included on the frequency identification tag. The circuitry transfers the stored information from the radio frequency identification tag to the base station in response to the excitation signal, which base station receives and decodes the information. In general, radio frequency identification tags can carry and transmit a significant amount of information-enough information to uniquely identify individuals, packages, inventory, and the like.

A typical technique for powering and reading a radio frequency identification tag is a combination of inductive coupling or inductive power coupling and capacitive data coupling. Inductive coupling uses a coil element in a radio frequency identification tag. The coil component is excited (or activated) by an excitation signal of the base station to power the radio frequency identification tag circuit. The radio frequency identification tag coil or the second tag coil may be used to transmit and receive information stored between the radio frequency identification tag and the base station. Radio frequency identification tags, which rely on inductive coupling because the field created by the excitation signal must cross substantially perpendicular to the coil component for effective coupling, Sensitive to direction The reading range for inductively coupled devices is typically on the order of a few centimeters. Longer reading distances are better, and longer reading distances are required for certain applications such as electronic animal identification, baggage tracking, parcel tracking and inventory management applications.

Another technique for powering and reading radio frequency identification tags is the electrostatic coupling used in radio frequency identification tag systems and radio frequency identification tags. These systems provide significantly increased read / write distances than are available in the prior art. Another advantage derived from the use of the disclosed systems and tags is that users do not have to bring the tag very close to the base station and do not need to orient the tag relative to the base station. It is thus possible to integrate the antenna components of the base station into, for example, a doorway or vestibule, a package conveyor or article sorting system, and to be able to activate tags and read tag information over longer distances. .

The antenna acts as an intermediary between the tag and the reader, sending signals as radio waves to activate or deactivate the tag and to read and write data.

To date, radio frequency identification tags have been manufactured in a single package—independent units, that is, tag circuit chips, antennas, and substrates. Therefore, the size and structure of the antenna not only becomes a problem in the performance of the radio frequency identification tag, but also the antenna plays an important role in the price of the completed tag. In addition, the conventional antenna has a limited recognition distance and its bandwidth is limited, and it does not solve the problems of miniaturization and design, and the problem of bandwidth expansion, and in general, the antenna has a predetermined recognition length and a short width, so that a plurality of antennas There was a hassle to install in parallel, and the antennas arranged in parallel as above are not consistent in recognition distance and width, so when the antenna is out of the installed area, there is a high probability that information recognition of the tag will fail. have.

The present invention is to solve the problems as described above, and to provide an antenna for a radio frequency identification system that can improve the directivity and efficiency by configuring a combination of two and more antennas multiple antennas. have.

In order to achieve the above object, the antenna for a radio frequency identification system of the present invention is an antenna for a radio frequency identification system that reads the tag information of the radio frequency identification system consisting of a tag, an antenna, a reader and delivers it to the reader. In this case, the antenna is provided with a plurality of constituent antennas connected to one chip, and configured to have the same distance from each constituent antenna to the chip to improve recognition distance and bandwidth, thereby improving directivity and efficiency. To provide an antenna for a radio frequency identification system.

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

1 is a view showing a schematic configuration of an antenna for a radio frequency identification system according to the present invention, Figure 2 is a view showing another embodiment of the present invention, Figure 2a is an embodiment when there are two configuration antennas 2B is an embodiment of four configuration antennas, FIG. 3 is an explanatory diagram schematically showing a general configuration of a radio frequency identification system, and FIG. 4 is a diagram showing a schematic configuration of a conventional antenna.

The antenna for the radio frequency identification system of the present invention reads the information of the tag 10 of the radio frequency identification system including the tag 10, the antenna 20, and the reader 30, and transmits the information to the reader 30. In the antenna 20 for the frequency identification system, the antenna 20 is a plurality of antennas 210, 220, 230, 240, 210 ', 220' around a single chip 200. 230 'and 240' are connected and provided, and the chip 200 in each of the antennas 210, 220, 230, 240, 210 ', 220', 230 ', and 240' may be provided. The distance to) is the same so that the recognition distance and the bandwidth can be improved to increase the directivity and efficiency.

As shown in FIG. 3, a general radio frequency identification system includes a tag 10, an antenna 20, and a reader 30.

The tag 10 contains information of the article to be managed and is attached to the article to be managed.

The antenna 20 receives the information of the object to be managed in the tag 10 and transmits the information to the reader 30. The thickness, diameter, width, and the like of the linear conductor constituting the antenna 20 are not particularly limited. Metals such as electricity, copper, and silver are preferably cited as the material. It is also possible to cover the surface with a thin insulator layer.

The reader 30 receives the information of the tag 10 through the antenna 20 and processes the information.

According to an embodiment of the present invention, as shown in Figure 1, the antenna for the radio frequency identification system of the present invention is provided with one chip 200 in the center, the plurality of components antenna ( 210, 220, 230, 240, 210 ', 220', 230 'and 240' are connected to each other.

The distance from the configuration antenna 210 to the contact J1 is the same as the distance from the configuration antenna 220 to the contact J1. Similarly, the distance from the configuration antenna 230 to the contact J2 is configured to be the same as the distance from the configuration antenna 240 to the contact J2. Moreover, the distance from the contact J1 to the contact J3 and the distance from the contact J2 to the contact J3 are comprised equally. In addition, the distances from the respective antennas 210, 220, 230, and 240 to the contact point J3 are the same, so that the chip 200 is formed in each of the antennas 210, 220, 230, and 240. The distance to () is the same.

In addition, the distance from the configuration antenna 210 'to the contact J1' is the same as the distance from the configuration antenna 220 'to the contact J1'. Similarly, the distance from the configuration antenna 230 'to the contact J2' is the same as the distance from the configuration antenna 240 'to the contact J2'. Further, the distance from the contact J1 'to the contact J3' and the distance from the contact J2 'to the contact J3' are the same. Then, the distance from each of the component antennas 210 ', 220', 230 ', 240' to the contact J3 'is the same, so that the component antennas 210', 220 ', 230' are the same. The distances from the chips 240 'to the chips 200 are the same.

As described above, the distances from the respective antennas 210, 220, 230, 240, 210 ', 220', 230 ', 240' to the chip 200 are the same. do.

The antenna for a radio frequency identification system of the present invention can connect a plurality of configuration antennas to the chip 200 to improve recognition distance and bandwidth to further increase directivity and efficiency, and the antenna for a radio frequency identification system configured as described above The recognition width and the recognition distance are extended together to transfer the information of the tag 10 to the reader 30 more reliably and easily.

In addition, since the antenna for the radio frequency identification system configured as described above is configured to have the same distance from each component antenna to the chip 200, it recognizes the information of the tag 10 and transfers the same time to the chip 200. To ensure the reliability of the recognition information.

According to another embodiment of the present invention, as shown in FIG. 2A, a plurality of component antennas 41 and 42 are connected to one chip 40.

The distance from the component antenna 41 to the contact J4 is the same as the distance from the component antenna 42 to the contact J4, resulting in the chip 40 at each of the component antennas 41 and 42. It is configured so that the distances are the same.

As described above, the distances from the respective antennas 41 and 42 to the chip 40 are the same.

According to another embodiment of the present invention, as shown in FIG. 2B, one chip 50 is provided at the center, and the plurality of components antennas 51, 52, 53 ( 54 is provided in connection.

The distance from the configuration antenna 51 to the contact J5 is the same as the distance from the configuration antenna 52 to the contact J5. Similarly, the distance from the configuration antenna 53 to the contact J6 is the same as the distance from the configuration antenna 54 to the contact J6. In addition, the distance from the contact J5 to the contact J7 and the distance from the contact J6 to the contact J7 are configured to be the same. Then, the distance from each of the component antennas 51, 52, 53, 54 to the contact J7 is the same, so that the chip 50 at each of the component antennas 51, 52, 53, 54 is finally made. The distance to) is equal.

In this manner, the distances from the respective antennas 51, 52, 53, 54 to the chip 50 are the same.
If the distance from each component antenna to the chip of the present invention is not the same, the time that the signal arrives at the chip from each component antenna is not the same and noise may occur.
In the present invention, since a plurality of component antennas are configured, reception of signals is easy, and thus the width of signal reception is increased by each component antenna, and the recognition distance is improved. The signal arrives on the chip at each component antenna in the same way, so that the correct signal can be received. As the distance from each component antenna to the chip is the same, the accuracy of signal and reception can be ensured, thereby improving recognition distance and bandwidth.

In the above, preferred embodiments of the present invention have been described with reference to the accompanying drawings. Here, the embodiments described in the specification and the drawings shown in the drawings are only one of the most preferred embodiment of the present invention and do not represent all of the technical ideas of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

As described above, the antenna for a radio frequency identification system according to the present invention can be configured by connecting a plurality of constituent antennas to a chip to further increase directivity and efficiency.

In addition, the antenna of the present invention is particularly useful for RFID based systems. The antenna functions as part of a long range readout antenna system that can operate within the limits set by the regulatory agency with respect to field emission, while providing suitable detection performance for all possible tag / antenna orientations. There is an effect that an antenna for a radio frequency identification system can be easily configured to provide a significantly increased read / write distance than is available so that the information of the radio frequency identification tag can be read in a wide range and range.

Claims (1)

In the antenna 20 for radio frequency identification system that reads the information of the tag 10 of the radio frequency identification system consisting of the tag 10, the antenna 20, the reader 30 and transmits the information to the reader 30 , The antenna 20 has a plurality of antennas 210, 220, 230, 240, 210 ′, 220 ′, 230 ′, 240 ′ connected to one chip 200. The recognition distance is provided so that the distances from the antennas 210, 220, 230, 240, 210 ', 220', 230 ', 240' to the chip 200 are the same. And an antenna for a radio frequency identification system, which can improve directivity and efficiency by improving bandwidth.

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