JP2019061516A - Identification body - Google Patents

Abstract

To increase the number of IDs that can be recognized while reducing an effect of a dielectric body.SOLUTION: An identification body includes: a ground pattern 40; and a plurality of antennae 11-22 arranged interposing a base substrate 10 and facing the ground pattern 40, and configured to exhibit a resonance peak by facing the ground pattern 40. The ground pattern 40 has a shape to cover the antennae 11-22 in a planer view. Each of the plurality of antennae 11-22 includes two components heading from a midpoint of two end parts of the antennae 11-22 to the two end parts and having vector components in X and Y directions different from each other, and lengths of the two components are different from one another among the plurality of antennae 11-22.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a discriminator that can recognize identification information using an antenna.

  Recently, with the development of the information society, information is recorded on labels and tags attached to products and the like, and management of products and the like is performed using the labels and tags. In information management using such labels and tags, a noncontact IC label or noncontact in which an IC chip capable of writing and reading information in a noncontact state to the label or tag is mounted The identification object using RFID technology, such as a type | mold IC tag, is rapidly prevailing from the outstanding convenience.

An identifier using such RFID technology is not limited to one having an IC chip mounted thereon as described above, but has a plurality of antennas having mutually different resonance peak frequencies, and a plurality of antennas without using an IC chip. It is also considered that a combination of antennas can recognize an ID. For example, by making the shapes of the inductor element and the capacitor element constituting the plurality of antennas different, or making the shapes and directions of the plurality of antennas different to make the resonance frequency different for each of the plurality of antennas, combining the antennas Patent Literatures 1 and 2 disclose techniques capable of representing an ID. If this technology is used, and the number of antennas is N, two information of “1” and “0” can be provided depending on the presence or absence of one antenna, and except in the case where all the antennas are not present. Thus, (2 ^N -1) IDs can be expressed in a recognizable manner.

Japanese Examined Patent Publication 7-80386 Japanese Patent Publication No. 2008-503759

  By the way, an identifier using the above-mentioned resonance peak is often used in a state of being in contact with a dielectric, such as being attached to a product or the like managed using the identifier. In that case, the frequency characteristics of the discriminator change due to the influence of the dielectric, and the resonance peak becomes loose and can not be detected, or the frequency of the resonance peak is largely shifted, and the ID serving as identification information is correctly There is a risk that it can not be recognized.

  FIG. 11 is a diagram for explaining the influence of the identification body using the resonance peak from the dielectric.

For example, when a card is manufactured using the above-described RFID technology, its thickness is 760 μm according to the JIS standard, and it is affected by the dielectric loss of all thickness and increase of the baseline due to the card base material. As shown in, even when the antenna has a Q value of 80, when it is made into a card, the Q value becomes about 40 as shown by the solid line in FIG. 11, and the resonance peak developed at the resonance frequency is blunted. As a result, in the 7 to 10 GHz UWB (ultra wide band) band, there is a problem that the number of IDs becomes very small, such as about 10 bits. In addition, since the card is easily affected by the back side, there is a problem that it is difficult to detect a resonance peak due to the influence of the hand and the card which is handled by hand. The Q value means that the frequency at the resonance peak is ω ₀ and the frequency at which the vibration energy is half the resonance peak on the lower frequency side than the resonance peak is ω ₁ and at the high frequency side than the resonance peak. When the frequency at which the vibration energy is half of the resonance peak is ω ₂ , the value is represented by Q = ω ₀ / (ω ₂ −ω ₁ ).

  Here, the applicant of the present application has devised a technique for reducing the influence of the dielectric by providing a ground pattern facing the antenna via the insulating layer. According to this technology, even when the card is manufactured using the above-described resonance peak or handled in hand, the influence of the dielectric is reduced, and it is possible to avoid that the resonance peak becomes difficult to detect. It will be. By the way, in this technology, the reflection characteristic is obtained by subtracting the absorption of the antenna from the amount of reflection of the ground pattern. Therefore, when the number of IDs is increased, the ground pattern increases with the number of antennas, whereby the amount of reflection of the ground pattern increases and the depth of the resonance peak decreases.

  FIG. 12 is a diagram for explaining the influence of an identification object having a ground pattern according to the number of IDs, in which (a) shows characteristics of resonance frequency when ID is 2 bits, (b ) Is a diagram showing the characteristics of the resonant frequency when the ID is 10 bits.

  When the number of IDs is 2 bits in an identifier having a ground pattern, the depth of the resonance peak is 9 dB as shown in FIG. 12A, while the number of IDs is 10 bits in the same configuration. In such a case, the depth of the resonance peak is 1.5 dB as shown in FIG. Therefore, even in the configuration in which the ground pattern is provided to face the antenna via the insulating layer, it may be difficult in principle to increase the number of IDs as described above.

  An object of the present invention is to provide an identifier capable of increasing the number of recognizable IDs while reducing the influence of a dielectric.

In order to achieve the above object, the present invention is
A conductive layer, and a plurality of antennas provided opposite to the conductive layer via an insulating layer and exhibiting a resonance peak by facing the conductive layer, the conductive layer being the antenna in plan view An identifier that is shaped to cover
Each of the plurality of antennas includes two components having different magnitudes of vector components in the X direction and the Y direction from the middle point between the two ends of the antenna to the two ends, and the plurality of antennas The lengths of the two components are different from each other in the antennas of.

  In the present invention configured as described above, a plurality of antennas face the conductive layer through the insulating layer so that a resonance peak appears, and this resonance peak is detected to recognize the ID. It will be At that time, the conductive layer is opposed to the antenna via the insulating layer, so that the radio wave irradiated to the identifier is also reflected at the conductive layer, but each of the plurality of antennas is two antennas. One component of the two components of the antenna and the polarization direction are the two components of the antenna, since the vector components in the X and Y directions are different in magnitude from the midpoint between the ends toward the two ends. When the same radio wave is emitted, the reflected wave to the antenna is reflected from the two components respectively. On the other hand, in the conductive layer facing the antenna, the reflected wave in the same polarization direction as the radio wave irradiated to the identifier is reflected. Therefore, if the reflected wave is received in the same polarization direction as the other of the two components of the antenna, only the reflected wave from the antenna can be received, thereby reliably detecting the resonance peak due to the reflected wave. be able to. At that time, since the lengths of the two components in the plurality of antennas are different from each other, the frequency at which the resonance peak is detected for each of the plurality of antennas is different, and depending on whether the resonance peak is detected at that frequency Can be recognized.

  Further, if the insulating layer and the plurality of antennas are respectively provided on the front and back of the conductive layer, the ID can be identified from any of the front and back without being affected by the conductive layer.

  As the antenna as described above, if the Q value in a state not facing the conductive layer is 30 or less, by facing the conductive layer, a sharp resonance peak having a Q value of 30 or more can be expressed.

  In addition, if a protective layer is disposed on the opposite side to the insulating layer of the antenna so as to cover the antenna in plan view, the protective layer can protect the antenna from external impact or the like.

  In addition, the printing receptive layer and the printing layer are disposed in this order on the surface of the protective layer opposite to the antenna, covering the antenna, whereby the card can be used as a card on which information is displayed.

  According to the present invention, each of the plurality of antennas consists of two components which are different from each other in magnitude of vector components in the X direction and in the Y direction from the midpoint between the two ends of the antenna toward the two ends Therefore, if one of the two components of the antenna emits a radio wave in the same polarization direction as one of the two components of the antenna and the reflected wave is received in the same polarization direction as the other of the two components of the antenna, the reflected wave by the antenna Can be received, thereby reliably detecting the resonance peak due to the reflected wave while reducing the influence of the dielectric. At that time, since the lengths of the two components in the plurality of antennas are different from each other, the frequency at which the resonance peak is detected differs for each of the plurality of antennas, and depending on whether the resonance peak is detected at that frequency The number of recognizable IDs can be increased.

  Further, in the case where the insulating layer and the plurality of antennas are respectively provided on the front and back of the conductive layer, the ID can be identified from any of the front and back without being affected by the conductive layer.

  In addition, in the case where the protective layer is disposed on the opposite side of the antenna to the insulating layer so as to cover the antenna in plan view, the protective layer can protect the antenna from external impact or the like.

  In addition, in the case where the print receiving layer and the print layer are disposed in this order to cover the antenna on the side opposite to the antenna on the protective layer, the card may be used as a card on which information is displayed on the surface it can.

It is a figure which shows an example of a basic composition of the identification body of this invention, (a) is a surface figure, (b) is an AA 'sectional view shown to (a), (c) is a base substrate. FIG. A radio wave having the same polarization direction as one of the two antenna components constituting the antenna was irradiated to the ID tag shown in FIG. 1 and a reflected wave was received in the same polarization direction as the other antenna component. It is a figure which shows the frequency characteristic in the case. It is a figure which shows 1st Embodiment of the identification body of this invention, (a) is a surface figure, (b) is an AA 'cross section shown to (a), (c) is a base material. It is a figure which shows the structure of a lamination | stacking surface with a protective layer. It is sectional drawing for demonstrating the manufacturing method of ID tag shown in FIG. It is a figure for demonstrating the frequency characteristic of ID tag shown in FIG. It is a figure which shows 2nd Embodiment of the identification body of this invention, (a) is a surface figure, (b) is an AA 'cross section shown to (a), (c) is a base material. It is a figure which shows the structure of a lamination | stacking surface with a protective layer. It is a figure which shows 3rd Embodiment of the identification body of this invention, (a) is a surface figure, (b) is an AA 'cross section shown to (a), (c) is a base material. It is a figure which shows the structure of a lamination | stacking surface with a protective layer. It is a figure which shows 4th Embodiment of the identification body of this invention, (a) is a surface figure, (b) is an AA 'sectional view shown to (a), (c) is to (a). BB 'sectional drawing shown, (d) is a reverse view. It is a figure which shows the structure of the lamination | stacking surface with the protective layer of the base material in the ID tag shown in FIG. It is a figure which shows the other shape of the antenna applicable to the identification body of this invention. It is a figure for demonstrating the influence which the identifier using a resonance peak receives from a dielectric. It is a figure for demonstrating the influence which the identification body which has a ground pattern receives according to the number of ID, (a) is a figure which shows the characteristic of the resonant frequency in case ID is 2 bits, (b) is ID. It is a figure which shows the characteristic of the resonant frequency in the case of being 10 bits.

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

  FIG. 1 is a view showing an example of a basic configuration of the identification body of the present invention, wherein (a) is a surface view, (b) is an AA 'cross-sectional view shown in (a), and (c) is FIG. 2 is a view showing a configuration on a base substrate 10;

  For example, as shown in FIG. 1, the identification body of the present invention is configured as an ID tag 1 in which both surfaces of a base material 10 are covered with protective layers 30a and 30b.

  The base substrate 10 is to be the insulating layer in the present invention, and is made of an insulating material having a thickness of about 200 to 300 μm. As an insulating material, although resin films, such as PET, etc. can be considered, a thing with a small dielectric loss tangent is preferable.

  The antenna 11 is laminated on the laminated surface of the base substrate 10 with the protective layer 30 a. The antenna 11 has a thickness of, for example, about 18 μm, and includes two linear antenna components 11a and 11b directed from the midpoint 11c between the two ends 11d and 11e of the antenna 11 to the ends 11d and 11e, respectively. The two antenna components 11a and 11b are configured to be orthogonal to each other at the middle point 11c. As a result, the two antenna components 11a and 11b have mutually different magnitudes of vector components in the X direction and the Y direction. The lengths of the antenna components 11a and 11b are such that resonance peaks appear when facing the ground pattern 40 described later. Then, a protective layer 30 a is laminated on the entire surface of the base substrate 10 so as to cover the antenna 11. The protective layer 30 a is made of, for example, an insulating material such as PET having a thickness of 100 μm, and is laminated on the entire surface of one side of the base material 10. The antenna 11 is protected from friction and the like by the protective layer 30a.

  A ground pattern 40 to be a conductive layer is laminated on the entire surface of the laminated surface of the base material 10 with the protective layer 30b. The ground pattern 40 has a thickness of, for example, about 18 μm as the antenna 11 and is laminated on the entire surface of the other surface of the base material 10 to have a shape covering the antenna 11 in plan view. There is. Then, a protective layer 30 b is laminated on the entire surface of the other surface of the base material 10 so as to cover the ground pattern 40. Similar to the protective layer 30 a, the protective layer 30 b is made of, for example, PET or the like having a thickness of 100 μm, and is laminated on the entire surface of the other surface of the base substrate 10. The ground pattern 40 is protected from friction and the like by the protective layer 30 b. The thickness of the antenna 11 and the ground pattern 40 may be about 3 μm.

  Below, the usage method of the ID tag 1 comprised as mentioned above is demonstrated.

  In the ID tag 1 shown in FIG. 1, a resonant peak is expressed by the antenna 11 facing the ground pattern 40 through the base substrate 10, and the ID is recognized by detecting this resonant peak. It will be At that time, since the ground pattern 40 is opposed to the antenna 11, the radio wave irradiated to the ID tag 1 is also reflected on the ground pattern 40.

  Here, in the ID tag 1 shown in FIG. 1, the two linear antenna components 11a, 11b of the antenna 11 are directed from the midpoint 11c between the two ends 11d and 11e of the antenna 11 to the ends 11d and 11e, respectively. The two antenna components 11a and 11b are configured to be orthogonal to each other at the middle point 11c. Therefore, when a radio wave having the same polarization direction as one of the two antenna components 11a and 11b of the antenna 11 is irradiated, the reflected wave to the antenna 11 is reflected from the two antenna components 11a and 11b. . On the other hand, in the ground pattern 40 facing the antenna 11, the reflected wave in the same polarization direction as the radio wave irradiated to the ID tag 1 is reflected.

  Therefore, for example, by irradiating a radio wave having the same polarization direction as the antenna component 11a and receiving a reflected wave in the same polarization direction as the antenna component 11b, it is possible to receive only the reflected wave by the antenna 11, thereby The resonance peak due to the reflected wave can be reliably detected.

  FIG. 2 shows that the ID tag 1 shown in FIG. 1 emits a radio wave having the same polarization direction as one of the two antenna components 11a and 11b constituting the antenna 11 and the other antenna component 11b. It is a figure which shows the frequency characteristic at the time of receiving a reflected wave by the same polarization direction as the above.

  A radio wave having the same polarization direction as that of one of the two antenna components 11a and 11b constituting the antenna 11 is irradiated to the ID tag 1 shown in FIG. 1 and the same polarization as the other antenna component 11b. When a reflected wave is received in the wave direction, as shown in FIG. 2, although the antenna 11 is covered with the protective layer 30a, the Q value is about 120. As a result, it is possible to obtain more ID numbers than conventional identifiers using resonance peaks. In addition, even in the configuration having the ground pattern, the reflected wave from the ground pattern is hardly received. Therefore, even if the area of the ground pattern is increased by increasing the number of IDs, there is no problem of weakening the resonance peak. .

  As described above, it is possible to receive only the reflected wave by the antenna 11 by irradiating the radio wave having the same polarization direction as the antenna component 11a and receiving the reflected wave in the same polarization direction as the antenna component 11b. For this purpose, a high frequency band whose main component is an electric field is preferable, and it is preferable to use a radio wave having a frequency equal to or higher than the UHF band.

  Hereinafter, some embodiments of an identifier that can identify an ID including a plurality of individual IDs using the above-described ID tag 1 will be described as an example.

First Embodiment
FIG. 3 is a view showing a first embodiment of the identification body of the present invention, wherein (a) is a surface view, (b) is an AA 'cross-sectional view shown in (a), (c) is It is a figure which shows the structure of the lamination | stacking surface with the protective layer 30a of the base material 10. FIG.

  As shown in FIG. 3, the identifier according to the present embodiment has 12 antennas 11 to 22 provided on the laminated surface of the base substrate 10 with the protective layer 30a of the ID tag 1 shown in FIG. Are different ID tags 101.

  The base substrate 10, the protective layers 30a and 30b, and the ground pattern 40 in the ID tag 101 of this embodiment are the same as those in the ID tag 1 shown in FIG. Each of the antennas 11 to 22 in the ID tag 101 of this embodiment is linear from the middle point between the two ends of the antennas 11 to 22 toward each end, similarly to the antenna 11 in the ID tag 1 shown in FIG. The two antenna components are configured to be orthogonal to each other at the middle point. Thereby, the magnitude | sizes of the vector component of X direction and a Y direction mutually differ in two antenna components which each comprise the antennas 11-22.

  Furthermore, in the antennas 11 to 22 in the ID tag 101 of the present embodiment, the lengths of the two antenna components constituting the antennas 11 to 22 differ from each other between the antennas 11 to 22, thereby facing the ground pattern 40. In this case, resonance frequencies at which resonance peaks appear differ from one another between the antennas 11 and 22. In addition, in FIG. 3, in order not to be difficult to see the antennas 11-22, the length of two antenna components which comprise the antennas 11-22 is made the same for the antennas 11-22.

  Hereinafter, a method of manufacturing the ID tag 101 configured as described above will be described.

  FIG. 4 is a cross-sectional view for explaining the method of manufacturing the ID tag 101 shown in FIG.

  In the case of manufacturing the ID tag 101 shown in FIG. 3, first, the ground pattern 40 is laminated on the entire surface of one side of the base material 10 by screen printing using silver ink, for example (FIG. 4 (a)). Also, on the other surface of the base substrate 10, the antennas 11 to 22 are laminated by screen printing using, for example, a silver ink (FIG. 4 (b)). The ground pattern 40 and the antennas 11 to 22 may be stacked simultaneously, regardless of the stacking order. The ground pattern 40 and the antennas 11 to 22 are not limited to the coating method by screen printing using silver ink, for example, and may be formed by laminating a conductive material made of copper or aluminum, and the antenna 11 is etched. To 22 may be formed. Further, the ground pattern 40 is not limited to one laminated on the entire surface of one surface of the base substrate 10, and faces the antennas 11 to 22 on one surface of the base substrate 10, and the antenna in plan view It is good also as composition divided into a shape which covers 11-22 separately. The antenna 11-22 and the ground pattern 40 can ensure a film thickness of about 3 μm by being stacked by etching or fixed printing. When the thickness of the antennas 11 to 22 and the ground pattern 40 is thin, the resistance value is increased, which makes it impossible to obtain a resonance peak described later. However, the antennas 11 to 22 and the ground pattern 40 may be etched or By laminating by fixed printing, a film thickness of about 3 μm can be secured, and as a result, a resonance peak can be obtained.

  After laminating the antennas 11 to 22 and the ground pattern 40 on the front and back of the base substrate 10, firing is performed, and then the antenna 11 to 22 and the ground pattern 40 are covered on the front and back of the base substrate 10, for example, 100 μm thick The protective layers 30a and 30b are laminated by a coating method of applying an insulating material such as PET or by thermocompression bonding by lamination, and the ID tag 101 shown in FIG. 3 is completed (FIG. 4C).

  Hereinafter, the operation of the ID tag 101 manufactured as described above will be described.

  First, the occurrence of a resonance peak when the antennas 11 to 22 face the ground pattern 40 will be described.

  In an antenna having a sharp resonance peak whose Q value exceeds 30, when facing the ground pattern 40, a resonance peak does not appear. On the other hand, in an antenna having a moderate resonance peak with a Q value of 30 or less, when facing the ground pattern 40, a sharp resonance peak with a Q value of 30 or more appears. As described above, in order to exhibit a resonance peak when facing the ground pattern 40, it is necessary that the Q value is 30 or less, or the resonance peak does not appear with an antenna alone.

  Therefore, in the antennas 11 to 22 shown in FIG. 3 as well, the antennas 11 to 22 alone, that is, the Q value in a state not facing the ground pattern 40 is 30 or less, and thus facing the ground pattern 40 A sharp resonance peak having a value of 30 or more will appear.

  In addition, the ground pattern 40 is provided to face the antennas 11 to 22 via the base substrate 10, so that the surface of the base substrate 10 opposite to the antennas 11 to 22 is held and used. Even when the dielectric is in contact with the surface of the base substrate 10 on the opposite side to the antennas 11 and 22, the influence of the dielectric is not exerted by the ground pattern 40, and the resonance peaks by the antennas 11 and 22 are detected. It will be

  Next, a resonance peak which appears when the antennas 11 to 22 face the ground pattern 40 will be described.

  FIG. 5 is a diagram for explaining the frequency characteristic of the ID tag 101 shown in FIG.

  As described above, in the antennas 11 to 22 stacked on the base substrate 10, the lengths of the two antenna components constituting the antennas 11 to 22 are different from each other between the antennas 11 to 22, so that the ground pattern is formed. When facing 40, the resonance frequencies at which resonance peaks appear differ from one another among the antennas 11-22. For example, the resonant frequency of the antenna 11 is the lowest, and then the resonant frequency increases in the order of the antenna 12, the antenna 13, the antenna 14, the antenna 15, the antenna 16, the antenna 16, the antenna 17, the antenna 18, the antenna 19, the antenna 20, and the antenna 21. , And the resonance frequency of the antenna 22 is the highest. Then, when a radio wave is irradiated to the ID tag 101 and the reflected wave is received, as shown by a broken line in FIG. Resonance peak by antenna 12 appears, resonance peak by antenna 13 appears at point C, resonance peak by antenna 14 appears at point D, and resonance peak by antenna 15 appears at point E, F A resonance peak by the antenna 16 appears at the point, a resonance peak by the antenna 17 appears at the point G, a resonance peak by the antenna 18 appears at the point H, and a resonance peak by the antenna 19 appears at the point I The resonance peak by the antenna 20 appears at the point J, the resonance peak by the antenna 21 appears at the point K, and the resonance peak by the antenna 22 appears at the point L. Therefore, at each of the points A to L, the individual ID when the resonance peak is detected is “1”, the individual ID when the resonance peak is not detected is “0”, and the resonance frequency is low. By arranging in order, ID "111111111111" will be identified.

  At that time, as in the ID tag 1 shown in FIG. 1, each of the antennas 11 to 22 is a linear two antenna directed from the midpoint between the two ends of the antennas 11 to 22 to each of the two ends Since the two antenna components are configured to be orthogonal to each other at the middle point, the radio waves are irradiated with the same polarization direction as one of the two antenna components constituting the antennas 11 to 22, and the other By receiving the reflected wave in the same polarization direction as the antenna component, it is possible to receive only the reflected wave from the antennas 11 to 22 without being affected by the ground pattern 40, thereby ensuring the resonance peak due to the reflected wave. Can be detected. Then, in the ID tag 101 according to the present embodiment, since the lengths of the two antenna components are different among the plurality of antennas 11-22, the frequency at which the resonance peak is detected is different for each of the plurality of antennas 11-22. Depending on whether a resonance peak is detected at that frequency, the number of recognizable IDs can be increased. Although the ID tag 101 according to the present embodiment can not write information on an IC chip mounted one, it is possible to identify an ID of at least about 20 bits with an inexpensive configuration.

Second Embodiment
FIG. 6 is a view showing a second embodiment of the discriminator of the present invention, wherein (a) is a surface view, (b) is an AA 'cross-sectional view shown in (a), and (c) is It is a figure which shows the structure of the lamination | stacking surface with the protective layer 30a of the base material 10. FIG.

  In the identification body in this embodiment, as shown in FIG. 6, the antennas 11 to 13 and 20 to 22 are not provided among the antennas 11 to 22 provided on the base substrate 10 in the ID tag 101 shown in FIG. This is the ID tag 201.

  When a radio wave is irradiated to the ID tag 201 configured as described above and the reflected wave is received, as shown by the solid line in FIG. The resonance peak by the antenna 15 appears at point E, the resonance peak by the antenna 16 appears at point F, the resonance peak by the antenna 17 appears at point G, and the resonance peak by the antenna 18 at point H The resonance peak by the antenna 19 appears at point I, and the resonance peaks occur at points A to C and J to L because the antennas 11 to 13 and 20 to 22 are not provided. do not do. Therefore, at each of the points A to L, the individual ID when the resonance peak is detected is “1”, the individual ID when the resonance peak is not detected is “0”, and the resonance frequency is low. By arranging in order, ID "000111111000" will be identified.

  As described above, by selectively providing an antenna on the base substrate 10 according to the ID given to the ID tag 1, 101, different IDs can be identified between the ID tags 1, 101. .

  In the present embodiment, the individual IDs “0” corresponding to the antennas 11 to 13 and 20 to 22 can be identified by not providing the antennas 11 to 13 and 20 to 22, but on the base substrate 10 It is impossible to receive the reflected wave from the antenna whose individual ID is "0", for example, by arranging all the antennas 11 to 22 and making the conductive layer face only the antenna whose individual ID is "0" among them via the insulating layer. By setting it as a state, it is possible to identify an ID formed by mixing individual IDs “1” and “0” as described above.

Third Embodiment
FIG. 7 is a view showing a third embodiment of the identification body of the present invention, wherein (a) is a surface view, (b) is an AA 'cross-sectional view shown in (a), and (c) is It is a figure which shows the structure of the lamination | stacking surface with the protective layer 30a of the base material 10. FIG.

  As shown in FIG. 7, the identifier in this embodiment is an ID tag 201 in which print receiving layers 50a and 50b and print layers 60a and 60b are stacked on the front and back of the ID tag 101 shown in FIG.

  In the ID tag 201 of this embodiment, after the print receiving layer 50a is laminated on the entire surface of the protective layer 30a opposite to the base substrate 10, the printing layer 60a is laminated by printing predetermined information. In addition, after the print receiving layer 50b is stacked on the entire surface of the protective layer 30b opposite to the ground pattern 40, the print layer 60b is stacked by printing predetermined information. Thereby, it can utilize as a card by which information, a pattern, etc. were displayed on the surface.

  In the present embodiment, the ID tag 201 in which the print receiving layers 50a and 50b and the print layers 60a and 60b are respectively stacked on the front and back of the ID tag 101 shown in FIG. 3 has been described as an example. It is possible to use as a card on which information, a pattern, and the like are displayed on the surface, even if the print receiving layer 50a and the print layer 60a are stacked on the protective layer 30a of the ID tag 101 shown in FIG.

Fourth Embodiment
FIG. 8 is a view showing a fourth embodiment of the identification body of the present invention, wherein (a) is a surface view, (b) is an AA 'cross-sectional view shown in (a), and (c) is It is a BB 'cross section figure shown to (a), (d) is a back view. FIG. 9 is a view showing the internal structure of the ID tag 401 shown in FIG. 8, where (a) is a view showing the configuration of the surface of the base substrate 10a laminated with the protective layer 30a, (b) is the base substrate It is a figure which shows the structure of a lamination | stacking surface with the protective layer 30b of 10b.

  As shown in FIG. 8 and FIG. 9, the identification body in this embodiment is different from that shown in FIG. 3 on the front and back of the ground pattern 40, in base substrates 10a and 10b and antennas 11 to 22 and 71 to 82, respectively. And the protective layers 30a and 30b are provided in different ID tags 401.

  In the ID tag 401 of the present embodiment, the antennas 11 to 22 disposed on one surface side of the ground pattern 40 and the antennas 71 to 82 disposed on the other surface side of the ground pattern 40 correspond to each other. The resonance frequencies are the same as each other because the shape is the same. Specifically, the resonant frequency of the antenna 11 disposed on one side of the ground pattern 40 and the antenna 71 disposed on the other side of the ground pattern 40 are the same, and one of the ground patterns 40 is The antenna 12 arranged on the surface side and the antenna 72 arranged on the other surface side of the ground pattern 40 have the same resonance frequency, and the antenna 13 arranged on one surface side of the ground pattern 40 and the ground The resonance frequency is the same as the antenna 73 disposed on the other surface side of the pattern 40, and the antenna 14 disposed on the one surface side of the ground pattern 40 and the other surface side of the ground pattern 40 An antenna 15 having the same resonant frequency as the antenna 74 and disposed on one side of the ground pattern 40, and a ground pattern 4 The antenna 75 has the same resonant frequency as the antenna 75 disposed on the other surface side of the antenna, and the antenna 16 disposed on the one surface side of the ground pattern 40 and the antenna 76 disposed on the other surface side of the ground pattern 40. And the antenna 17 arranged on one side of the ground pattern 40 have the same resonance frequency as the antenna 77 arranged on the other side of the ground pattern 40. The antenna 18 disposed on one side of the surface 40 and the antenna 78 disposed on the other side of the ground pattern 40 have the same resonant frequency, and the antenna disposed on one side of the ground pattern 40 19 and the antenna 79 disposed on the other surface side of the ground pattern 40 have the same resonant frequency, and The antenna 20 disposed on the surface side of the first and the antenna 80 disposed on the other surface side of the ground pattern 40 have the same resonant frequency, and the antenna 21 disposed on the one surface side of the ground pattern 40; The resonance frequency is the same as the antenna 81 disposed on the other surface side of the ground pattern 40, and the antenna 22 disposed on one surface side of the ground pattern 40 and the other surface side of the ground pattern 40 The antenna 82 has the same resonant frequency.

  In the ID tag 201 configured as described above, when a radio wave is irradiated from the side provided with the antennas 11 to 22 and the reflected wave is received, the ID “111111111111” is the same as that shown in FIG. If the radio wave is irradiated from the side provided with the antennas 71 to 82 and the reflected wave is received, the ID "111111111111" is also identified. In this case, also in this embodiment, two antennas 11 to 22 and 71 to 82 are straight from the middle point between the two ends of antennas 11 to 22 and 71 to 82 respectively to the two ends. Since two antenna components are configured to be orthogonal to each other at an intermediate point, the radio waves having the same polarization direction as one of the two antenna components constituting the antennas 11 to 22 and 71 to 82 are formed. By irradiating and receiving the reflected wave in the same polarization direction as the other antenna component, it is possible to receive only the reflected wave by the antennas 11 to 22 and 71 to 82 without being affected by the ground pattern 40. Thus, the resonance peak due to the reflected wave can be reliably detected.

  As described above, in the present embodiment, the base members 10a and 10b, the antennas 11 to 22 and 71 to 82, and the protective layers 30a and 30b are provided on the front and back of the ground pattern 40, respectively. The ID can be identified independently from either front or back, and even when a dielectric such as a hand is in contact with one side of the ID tag 401, the ID can be accurately identified from the other side. .

  In the present embodiment, by providing the antennas 11 to 22 and 71 to 82 on each of the front and back of the ground pattern 40, the ID can be identified independently from any of the front and back of the ID tag 401. Even when the dielectric such as a hand is in contact with one side of the ID tag 401, the ID can be accurately identified from the other side, but the presence or absence of the antenna is independent between the front and back of the ground pattern 40. Setting the radio wave from one side of the ID tag 401 and receiving its reflected wave, and the radio wave from the other side of the ID tag 401 and receiving its reflected wave And different IDs can be identified.

  FIG. 10 is a view showing another shape of the antenna applicable to the identification body of the present invention.

  In the embodiment described above, as the antenna, it comprises two linear antenna components respectively from the midpoint between the two ends of the antenna to the two ends, and the two antenna components are orthogonal to each other at the midpoint The antenna applicable to the identification body of the present invention is, for example, from the midpoint between the two ends of the antenna to the two ends, in the X direction and What is necessary is that it be composed of two antenna components having different magnitudes of vector components in the Y direction.

  For example, as shown in FIG. 10A, it comprises two linear antenna components 511a and 511b directed from the midpoint 511c between the two ends 511d and 511e of the antenna 511 to the two ends 511d and 511e, respectively. The two antenna components 511a and 511b intersect at an intermediate point 511c at an acute angle, and as shown in FIG. It may be composed of two antenna components 611a and 611b which are directed from the midpoint 611c between the portions 611d and 611e to the two ends 611d and 611e, respectively.

1, 101, 201, 301, 401 ID tag 10, 10a, 10b Base substrate 11 to 22, 71 to 82, 511, 611 antenna 11a, 11b, 511a, 511b, 611a, 611b Antenna component 11c, 511c, 611c Middle Point 11d, 11e, 511d, 511e, 611d, 611e End 30a, 30b Protective layer 40 Grand pattern 50a, 50b Print acceptance layer 60a, 60b Print layer

Claims (5)

A conductive layer, and a plurality of antennas provided opposite to the conductive layer via an insulating layer and exhibiting a resonance peak by facing the conductive layer, the conductive layer being the antenna in plan view An identifier that is shaped to cover
Each of the plurality of antennas includes two components having different magnitudes of vector components in the X direction and the Y direction from the middle point between the two ends of the antenna to the two ends, and the plurality of antennas The identification body, in which the lengths of the two components differ from each other between the antennas of. In the identifier according to claim 1,
The identification body, wherein the insulating layer and the plurality of antennas are respectively provided on the front and back of the conductive layer. In the identifier according to claim 1 or 2,
The identification body, wherein the antenna has a Q value of 30 or less in a state in which the antenna does not face the conductive layer. In the identifier according to any one of claims 1 to 3,
The identification body in which the protective layer is arrange | positioned so that the said antenna may be covered by planar view on the opposite side to the said insulating layer of the said antenna. In the identifier according to claim 4,
An identifier, wherein a print receiving layer and a printing layer are disposed in this order on the side of the protective layer opposite to the antenna, covering the antenna.

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