WO2017188210A1

WO2017188210A1 - Identifier and id generation method

Info

Publication number: WO2017188210A1
Application number: PCT/JP2017/016271
Authority: WO
Inventors: 岳央道坂; 正俊近藤; 裕出口
Original assignee: トッパン・フォームズ株式会社
Priority date: 2016-04-28
Filing date: 2017-04-25
Publication date: 2017-11-02
Also published as: JP6587575B2; JP2017199241A

Abstract

In the present invention a plurality of antennas 3a-3e having mutually different resonance frequencies are formed on a base material 2, and among these antennas 3a-3e, a resin layer 4, comprising a sealant for sealing the antennas 3a-3e and a nonmetallic dielectric different from the base material 2, is laminated on the antennas 3a, 3c, and 3e, in correspondence with an ID.

Description

Identifier and ID generation method

The present invention relates to an identifier and an ID generation method that can identify an ID using a resonance frequency or the like.

In recent years, with the progress of the information society, information is recorded on labels and tags attached to products and the like, and products and the like are managed using the labels and tags. In information management using such a label or tag, a non-contact type IC label or non-contact type in which an IC chip capable of writing or reading information in a non-contact state with respect to the label or tag is mounted. Discriminators using RFID technology such as type IC tags are rapidly spreading due to their excellent convenience.
The identification body using such RFID technology is not limited to the one on which the IC chip is mounted as described above, and has a plurality of antennas having different resonance frequencies, and the plurality of antennas without using the IC chip. It is also considered that IDs can be identified by a combination. For example, by changing the shape of the dielectric elements and capacitor elements that make up multiple antennas, or by changing the shape and orientation of the multiple antennas to make the resonance frequency different for each of the multiple antennas, A technique that enables an ID to be expressed is disclosed in Patent Document 1. In this technique, only the resonance frequency of the antenna corresponding to the ID can be detected by cutting the wiring or shorting the capacitor portion of any antenna having different resonance frequencies according to the ID. I am doing so. As a result, when the number of antennas is N, two pieces of information “1” and “0” can be provided depending on whether or not the resonance frequency can be detected, and (2 ^N −1) IDs are identified. It can be expressed as possible.

In addition, a plurality of wiring segments separated from each other are formed by analog printing, which is fixed printing, and a connection segment is additionally formed between desired wiring segments by digital printing, which is variable printing. Is disclosed in Japanese Patent Application Laid-Open No. H10-228688. In this technique, the resonance frequency of the antenna can be varied by combining fixed printing by analog printing and variable printing by digital printing.

Japanese Patent Publication No. 7-80386 Japanese Patent No. 5501601

However, when the antenna is processed according to the ID as described above, considerable equipment is required, and there is a problem that the resonance frequency cannot be easily changed. For example, when the wiring is cut according to the ID, the wiring portion needs to be exposed to the outside so that the wiring can be easily cut. However, if the wiring portion is exposed to the outside without using a considerable facility, the wiring may be disconnected unintentionally. Moreover, when short-circuiting the capacitor portion, a dedicated hot pressure device / high frequency equipment is required, and defects are likely to occur. Further, when fixed printing and variable printing are combined, a high-temperature drying oven for drying the conductive ink constituting the wiring segment is required, and IDs cannot be easily generated with different resonance frequencies.
The present invention has been made in view of the problems of the conventional techniques as described above, and can easily generate an ID in an identification body that can identify the ID using a resonance frequency or the like. An object is to provide an identifier and an ID generation method.

In order to achieve the above object, the present invention provides:
A discriminator that is formed by forming a conductive antenna on a base substrate, and that can identify a given ID using at least the resonance frequency of the conductive antenna,
In the conductive antenna, a sealing agent for sealing the conductive antenna and a non-metallic dielectric material different from the base substrate are arranged to face each other.
In the present invention configured as described above, the conductive antenna formed on the base substrate includes a sealant for sealing the conductive antenna and a non-metallic dielectric different from the base substrate. The frequency characteristics of the conductive antenna change due to the opposing arrangement. Therefore, a desired ID is generated by using this change in frequency characteristics.

Further, the present invention is an identification body that is formed on a base substrate and that can identify an ID using a plurality of conductive antennas having different resonance frequencies or polarization directions,
At least one electrically conductive antenna is selected according to the ID of the plurality of electrically conductive antenna, loss calculated from ^1/2 (dielectric constant) × (dielectric loss tangent) × (thickness [[mu] m]) Dielectrics having a coefficient of 0.75 or more are arranged to face each other.

In the present invention configured as described above, a plurality of conductive antennas having different resonance frequencies or polarization directions are formed on the base substrate, and the plurality of conductive antennas are selected according to the ID. A dielectric having a loss factor of 0.75 or more calculated from (relative dielectric constant) × (dielectric loss tangent) × (film thickness [μm]) ^1/2 is disposed opposite to at least one conductive antenna. By transmitting electromagnetic waves to a plurality of conductive antennas and receiving reflected waves from the plurality of conductive antennas, the resonant frequency or polarization of the conductive antennas depending on the reflected intensity in the received reflected waves. When it is determined that the direction is detected, among the plurality of conductive antennas, in the conductive antenna in which the dielectrics are arranged to face each other, the reflection intensity in the reflected wave decreases, It is not determined that the wave number or polarization direction has been detected. Then, the individual ID for the conductive antenna for which it is determined that the resonance frequency or the polarization direction is detected is the first identifier, and the individual ID for the conductive antenna for which it is determined that the resonance frequency or the polarization direction is not detected is the first ID. The ID is generated by arranging these individual IDs in a predetermined order with the identifier of 2. Here, the plurality of conductive antennas are uniformly formed on the base substrate without depending on the ID, and the conductive antennas may be formed by disposing a dielectric to face the plurality of conductive antennas. Since individual IDs are generated for each, the resonance frequency and reflection intensity can be easily set without causing unintentional disconnection of the conductive antenna, and without using a dedicated hot-pressure device / high-frequency equipment or a high-temperature drying furnace. Different IDs can be generated.

According to the present invention, the conductive antenna formed on the base substrate and the non-metal dielectric different from the base material and the sealant for sealing the conductive antenna are disposed opposite to each other. Since the desired ID is generated in this way, it is possible to easily generate the desired ID without causing unintentional disconnection in the conductive antenna and without using a dedicated hot-pressure device / high-frequency equipment or a high-temperature drying furnace. be able to.
In addition, since a dielectric is not arranged or opposed to a plurality of conductive antennas uniformly formed on the base substrate regardless of ID, an individual ID for each conductive antenna is generated. An ID can be easily generated with different resonance frequencies and reflection intensities without causing unintentional disconnection in the conductive antenna and without using a dedicated hot-pressure device / high-frequency equipment or a high-temperature drying furnace. .

It is a surface view which shows one Embodiment of the identification body of this invention. FIG. 1B is a cross-sectional view taken along the line A-A ′ shown in FIG. It is a figure which shows the structure of the surface which removed the resin layer from the ID tag shown in FIG. 1a. It is a surface view which shows other embodiment of the identification object of this invention. FIG. 2b is a cross-sectional view taken along the line A-A 'shown in FIG. 2a. It is a figure which shows the structure of the surface which removed the resin layer from the ID tag shown in FIG. 2a. 2 is a diagram showing an example of an ID generation system that generates and discriminates IDs assigned to ID tags shown in FIGS. 1a to 1c and 2a to 2c. FIG. It is a figure which shows the change of the frequency characteristic of the reflected wave from an antenna in case the resin layer is laminated | stacked on the antenna. It is a figure which shows the change of the frequency characteristic of the reflected wave from an antenna when the thickness of the dielectric material which comprises a resin layer is changed. It is a figure which shows the change of the frequency characteristic of the reflected wave from an antenna when the dielectric loss tangent of the dielectric material which comprises a resin layer is changed. It is a figure which shows the change of the frequency characteristic of the reflected wave from an antenna at the time of changing the dielectric constant of the dielectric material which comprises a resin layer. FIG. 5 is a table summarizing changes in frequency characteristics shown in FIGS. 5a to 5c and calculation coefficients using (dielectric constant) × (dielectric loss tangent) × (film thickness [μm]) ^1/2 at that time. . It is a surface view which shows other embodiment of the identification object of this invention. FIG. 7B is a cross-sectional view taken along the line A-A ′ shown in FIG. It is a reverse view which shows other embodiment of the identification body of this invention.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1a is a surface view showing an embodiment of an identifier of the present invention. FIG. 1B is a cross-sectional view taken along the line AA ′ shown in FIG. 1a. FIG. 1c is a diagram showing the configuration of the surface where the resin layer 4 is removed from the ID tag 1a shown in FIG. 1a. In FIG. 1c, a region where the resin layer 4 is laminated is indicated by a broken line.
As shown in FIGS. 1a to 1c, the identification body in this embodiment includes five conductive antennas 3a to 3e formed on a base substrate 2 made of an insulating material such as a resin film, and the antennas 3a to 3e. Among these, the ID tag 1a is formed by laminating the resin layer 4 on the

antennas

3a, 3c, 3e.

The antennas 3a to 3e have a rectangular outer shape, and have a shape in which a slit enters the longitudinal direction from one of the short sides. The antennas 3a to 3e have the same width, and have different resonance frequencies due to their different lengths in the longitudinal direction. The ID tag 1a can identify any ID using the antennas 3a to 3e. However, the antennas 3a to 3e are all formed uniformly on the base substrate 2 by fixed printing regardless of the ID. Has been.
The resin layer 4 is laminated only on the

antennas

3a, 3c and 3e according to the ID assigned to the ID tag 1a among the antennas 3a to 3e formed on the base substrate 2. The resin layer 4 is formed by, for example, applying a resin-containing liquid in a rectangular shape larger than the outer shape of the

antennas

3a, 3c, 3e so as to cover the

antennas

3a, 3c, 3e by solid printing. It can be laminated on 3e. Accordingly, the resin layer 4 serving as a dielectric is opposed to the

antennas

3a, 3c, 3e selected according to the ID given to the ID tag 1a among the antennas 3a to 3e formed on the base substrate 2. It is the composition arranged.

FIG. 2a is a surface view showing another embodiment of the identifier of the present invention. FIG. 2B is a cross-sectional view taken along the line AA ′ shown in FIG. 2A. FIG. 2c is a diagram showing the configuration of the surface where the resin layer 4 is removed from the ID tag 1b shown in FIG. 2a. In addition, in FIG. 2c, the area | region where the resin layer 4 is laminated | stacked is shown with the broken line.
As shown in FIGS. 2a to 2c, the identification body in this embodiment is formed by laminating a resin layer 4 among the antennas 3a to 3e formed on the base substrate 2 with respect to those shown in FIGS. 1a to 1c. Different antennas. In the ID tag 1b according to this embodiment, the resin layer 4 is laminated only on the

antennas

3a, 3c, and 3d among the antennas 3a to 3e.

The ID tags 1a and 1b configured as described above are given IDs that can be identified, and among the antennas 3a to 3e formed on the base substrate 2, the IDs assigned to the

ID tags

1a and 1b. On the antenna selected according to the above, a sealing agent for sealing the antennas 3a to 3e and a resin layer 4 which is a non-metallic dielectric material different from the base substrate 2 are laminated. When the electromagnetic waves are transmitted to the

ID tags

1a and 1b, the individual IDs corresponding to the resonance frequencies detected by the reflection intensity in the reflected wave with respect to the electromagnetic waves are arranged in the order of the resonance frequencies, so that the ID tag The IDs assigned to 1a and 1b are generated and determined.
Hereinafter, an ID generation method for generating and determining IDs assigned to the

ID tags

1a and 1b configured as described above will be described.

FIG. 3 is a diagram showing an example of an ID generation system that generates and discriminates IDs assigned to the

ID tags

1a and 1b shown in FIGS. 1a to 1c and 2a to 2c. In FIG. 3, although the illustration of the ID tag 1b is omitted, similarly to the ID tag 1a, the electromagnetic wave transmitted from the reading device 5 is reflected by the ID tag 1b.
As shown in FIG. 3, the ID generation system in this example includes the ID tag 1a shown in FIGS. 1a to 1c and a reading device 5 that generates and discriminates the ID assigned to the ID tag 1a. The reading device 5 includes

antennas

30 a and 30 b, an electromagnetic wave radiation unit 10, a reflected wave reception unit 20, a processing unit 40, and a control unit 50.

The electromagnetic wave radiation unit 10 transmits electromagnetic waves including the resonance frequencies of the antennas 3a to 3e of the

ID tags

1a and 1b via the antenna 30a.
The reflected wave receiving unit 20 receives the reflected waves from the

ID tags

1a and 1b received via the antenna 30b with respect to the electromagnetic waves transmitted from the electromagnetic wave emitting unit 10 via the antenna 30a.
The processing unit 40 includes a reflection intensity detection unit 41 and an ID generation unit 42.
The reflection intensity detector 41 detects the reflection intensity in the reflected wave received by the reflected wave receiver 20.

The ID generation unit 42 determines whether or not the resonance frequency of the antenna in the

ID tags

1a and 1b is detected based on the reflection intensity detected by the reflection intensity detection unit 41. Based on the detection result of the resonance frequency, the ID generation unit 42 sets the individual ID for the antenna determined to have detected the resonance frequency as the first identifier “1” and determines that the resonance frequency has not been detected. The ID assigned to the

ID tags

1a and 1b is generated and discriminated by setting the individual ID for the antenna to “0” as the second identifier and arranging these “1” and “0” in the order of the resonance frequency. To do.
The control unit 50 controls the emission of electromagnetic waves in the electromagnetic wave emission unit 10 and each process in the processing unit 40.

In the

ID tags

1a and 1b shown in FIGS. 1a to 1c and 2a to 2c, as described above, the reflected wave with respect to the electromagnetic wave emitted from the reading device 5 shown in FIG. Then, the assigned ID is generated and determined based on the resonance frequency detected by the reflection intensity in the reflected wave. At this time, the resonance frequency detected by the reader 5 is made different by changing the antenna on which the resin layer 4 is laminated among the antennas 3a to 3e.
Hereinafter, the principle that different IDs can be assigned to the

ID tags

1a and 1b on which the same antennas 3a to 3e are formed will be described.

FIG. 4 is a diagram illustrating a change in frequency characteristics of a reflected wave from the antenna when a resin layer is laminated on the antenna.
For example, on a hollow rectangular antenna having a resonance frequency near 6.7 GHz as shown by the solid line in FIG. 4, the dry film thickness is 130 μm, the relative dielectric constant is 3.62, and the dielectric loss tangent at a frequency of 10 GHz is 0.3. When a resin layer is laminated by applying a 10% pyrrolidone solution of 804 polyvinylpyrrolidone, as shown by the broken line in FIG. , The resonance frequency is not detected in the vicinity of 6.7 GHz.

Also in the

ID tags

1a and 1b shown in FIGS. 1a to 1c and 2a to 2c, as described above, the resonance frequency of the antenna having the resin layer 4 laminated among the antennas 3a to 3e is not detected. For example, by stacking the resin layer 4 on the antenna selected according to the ID given to the

ID tags

1a and 1b among the antennas 3a to 3e, the reading device 5 gives the

ID tags

1a and 1b. ID can be generated and discriminated.
FIG. 5a is a diagram showing a change in frequency characteristics of a reflected wave from an antenna when the thickness of a dielectric constituting the resin layer is changed. FIG. 5b is a diagram showing a change in frequency characteristics of a reflected wave from the antenna when the dielectric loss tangent of the dielectric constituting the resin layer is changed. FIG. 5c is a diagram illustrating a change in frequency characteristics of a reflected wave from the antenna when the dielectric constant of the dielectric constituting the resin layer is changed.

As shown in FIG. 5a, a dielectric having a dielectric constant ε = 3 and a dielectric loss tangent tan σ = 0.2 at a frequency of 10 GHz is laminated on an antenna having a resonance frequency near 8.3 GHz, and the film thickness t of the dielectric is The frequency characteristics at that time were measured by changing the thickness to 1 μm, 10 μm, 50 μm, and 100 μm.
Then, when the film thickness is t = 1 μm, the reflection intensity in the reflected wave from the antenna does not decrease so much and the resonance frequency is detected, but the reflected wave from the antenna increases as the film thickness t of the dielectric increases. Thus, the reflection intensity at the point decreases in a quadratic curve. When laminating a dielectric on an antenna by coating, it is appropriate that the film thickness is about 0.5 to 20 μm. Therefore, in order to increase the film thickness, it is considered to stick a dielectric seal. It is done. In that case, a film thickness of several hundred μm can be secured.

Further, as shown in FIG. 5b, a dielectric having a relative dielectric constant = 3 and a film thickness t = 10 μm is laminated on an antenna having a resonance frequency peak in the vicinity of 8.3 GHz, and a dielectric loss tangent tanσ at a frequency of 10 GHz is set to 0. The frequency characteristics at that time were measured by changing the values to 05, 0.1, 0.2, and 0.5.
Then, when the dielectric loss tangent tan σ = 0.05, although the resonance frequency is shifted, the reflection intensity in the reflected wave from the antenna does not decrease so much and the resonance frequency is detected. However, as the dielectric loss tangent tan σ of the dielectric increases. As a result, the reflection intensity of the reflected wave from the antenna decreases linearly. Note that, when the dielectric loss tangent is increased, the reflection intensity simply decreases. Therefore, in order to prevent the resonance frequency from being detected, a higher one is desirable. At that time, it is possible to increase the dielectric loss tangent of the resin by mixing a specific additive.

Further, as shown in FIG. 5c, a dielectric having a film thickness t = 10 μm and a dielectric loss tangent tan σ = 0.2 at a frequency of 10 GHz is laminated on an antenna having a resonance frequency peak in the vicinity of 8.3 GHz, and a relative dielectric constant ε Was changed to 2, 3, 4, and 5, and the frequency characteristics at that time were measured.
Then, as the relative dielectric constant ε of the dielectric increases, the reflection intensity in the reflected wave from the antenna decreases linearly. The relative dielectric constant of ordinary polymer materials is 2-8. In addition, it is possible to increase the relative dielectric constant of the resin by mixing a specific additive.
Based on the above measurement results, (relative dielectric constant) × (dielectric loss tangent at a frequency of 10 GHz) × (film thickness [μm]) ^1/2 is used as an approximate expression for reducing the reflection intensity in the reflected wave from the antenna. In addition, when the dielectric is laminated on the antenna, it is possible to set a condition for setting the reflection intensity of the reflected wave from the antenna to a level that does not reach the reference for determining that the resonance frequency is detected.

FIG. 6 shows the change using the frequency characteristics shown in FIGS. 5a to 5c and the calculation using (relative permittivity) × (dielectric loss tangent at a frequency of 10 GHz) × (film thickness [μm]) ^{1/2 at} that time. It is the table | surface which put together the coefficient.
In general, when the electromagnetic wave intensity difference is -3 dB, the power is halved. Here, in the change in the frequency characteristics shown in FIGS. 5a to 5c, (relative dielectric constant) × (dielectric loss tangent at a frequency of 10 GHz) × (film thickness [μm] when the intensity difference of the reflected wave is −3 dB or more. ] The calculation coefficient by ^1/2 is No. in FIG. 2 and No. From the measurement result of 10, it is assumed that it is 0.75 or more.

Therefore, when the dielectric is laminated on the antenna, the condition for making the reflection intensity of the reflected wave from the antenna not reach the standard for determining that the resonance frequency has been detected is (relative dielectric constant). X (dielectric loss tangent at a frequency of 10 GHz) x (film thickness [μm]) A dielectric loss factor calculated from ^1/2 is set to 0.75 or more. This is because the reflection intensity in the reflected wave from the antenna decreases in a quadratic curve as the dielectric film thickness increases, so it is good when the calculation coefficient is small. Correlation is obtained. On the other hand, when the calculated coefficient is large, the deviation becomes somewhat large. However, when the calculated coefficient is large, the reflection intensity is largely decreased, so that the state where it is not determined that the resonance frequency has been detected remains unchanged. In addition, when the calculation coefficient when the intensity difference of the reflected wave is a minute difference such as −1 dB is set as a condition, it is difficult to discriminate from a blur such as noise.

In this way, a dielectric having a loss factor calculated from (relative dielectric constant) × (dielectric loss tangent at a frequency of 10 GHz) × (film thickness [μm]) ^1/2 is 0.75 or more. When the electromagnetic waves are arranged opposite to each other, even if an electromagnetic wave is transmitted to the antenna, the reflection intensity in the reflected wave is reduced, and it is determined that the resonance frequency has not been detected. Therefore, in this embodiment, whether or not it is determined that a plurality of conductive antennas having different resonance frequencies are formed on the base substrate and the resonance frequency is detected by a reflected wave of an electromagnetic wave transmitted to the antenna. With respect to the ID tag for which the assigned ID is discriminated, at least one conductive antenna selected according to the ID among the plurality of conductive antennas is (relative dielectric constant) × (dielectric loss tangent at a frequency of 10 GHz) × (Thickness [μm]) Dielectrics having a loss coefficient calculated from ^1/2 are 0.75 or more are arranged facing each other. Then, among the plurality of conductive antennas, the individual ID for the conductive antenna for which it is determined that the resonance frequency is detected by the reflected wave is “1”, and the individual for the conductive antenna for which it is determined that the resonance frequency has not been detected. By setting the ID to “0” and arranging these individual IDs in a predetermined order, there is no unintentional disconnection in the conductive antenna, and there is no need to use a dedicated hot pressure / high frequency equipment or a high-temperature drying furnace. The ID can be easily generated by changing the resonance frequency and reflection intensity.

Hereinafter, as specific examples, IDs generated using the

ID tags

1a and 1b shown in FIGS. 1a to 1c and 2a to 2c will be described as examples.
In the ID tag 1a shown in FIGS. 1a to 1c, as described above, five antennas 3a to 3e having different resonance frequencies are formed on the base substrate 2, and among these five conductive antennas 3a to 3e, The resin layer 4 is laminated on the

antennas

3a, 3c, 3e. As described above, the loss coefficient calculated from (relative dielectric constant) × (dielectric loss tangent at a frequency of 10 GHz) × (film thickness [μm]) ^{1/2 of} the resin layer 4 is 0.75 or more. When the electromagnetic wave is transmitted from the electromagnetic wave radiation unit 10 of the reading device 5 shown in FIG. 3 to the ID tag 1a, the ID tag 1a received by the reflected wave reception unit 20 of the reading device 5 is configured. In the reflected wave, it is determined that the resonance frequencies of the

antennas

3b, 3d are detected, but the resonance frequencies of the

antennas

3a, 3c, 3e are not detected.

Then, in the ID generation unit 42, the individual ID for the

antennas

3b and 3d for which the resonance frequency has been detected is set to “1”, and the individual ID for the

antennas

3a, 3c and 3e for which the resonance frequency has not been detected is determined. By setting “0” and arranging these “1” and “0” in the order of the resonance frequency, the ID “01010” assigned to the ID tag 1a is generated and determined.
In addition, as described above, the ID tag 1b shown in FIGS. 2a to 2c has the resin layer 4 laminated on the

antennas

3a, 3c, and 3d among the antennas 3a to 3e formed on the base substrate 2. It is configured. As described above, the loss coefficient calculated from (relative dielectric constant) × (dielectric loss tangent at a frequency of 10 GHz) × (film thickness [μm]) ^{1/2 of} the resin layer 4 is 0.75 or more. When the electromagnetic wave is transmitted from the electromagnetic wave radiation unit 10 of the reading device 5 shown in FIG. 3 to the ID tag 1b, the ID tag 1b received by the reflected wave reception unit 20 of the reading device 5 is configured. In the reflected wave, it is determined that the resonance frequencies of the

antennas

3b, 3e are detected, but the resonance frequencies of the

antennas

3a, 3c, 3d are not detected.
Then, in the ID generation unit 42, the individual ID for the

antennas

3b and 3e for which the resonance frequency has been detected is set to “1”, and the individual ID for the

antennas

3a, 3c and 3d for which it has been determined that the resonance frequency has not been detected. By setting “0” and arranging these “1” and “0” in the order of the resonance frequency, the ID “01001” assigned to the ID tag 1b is generated and determined.

(Other embodiments)
FIG. 7a is a surface view showing another embodiment of the identifier of the present invention. FIG. 7B is a cross-sectional view taken along the line AA ′ shown in FIG. 7A. FIG. 7 c is a back view showing another embodiment of the identifier of the present invention.
As shown in FIGS. 7a to 7c, the identification body in the present embodiment is different from that shown in FIGS. 1a to 1c in that the resin layer 4 is not laminated on the

antennas

3a, 3c, 3e, but the base The ID tag 1c is different in that the resin layer 4 is disposed on the surface of the base 2 opposite to the surface on which the antennas 3a to 3e are formed so as to face the

antennas

3a, 3c, and 3e.
Also in the ID tag 1c according to this embodiment, the resin layer 4 has a loss coefficient calculated from (relative dielectric constant) × (dielectric loss tangent at a frequency of 10 GHz) × (film thickness [μm]) ^1/2. When the electromagnetic wave is transmitted from the electromagnetic wave radiation unit 10 of the reading device 5 shown in FIG. 3, the reflection from the ID tag 1 c received by the reflected wave reception unit 20 of the reading device 5 is configured. In the wave, it is determined that the resonance frequencies of the

antennas

3b and 3d are detected, but it is determined that the resonance frequencies of the

antennas

3a, 3c and 3e are not detected. As a result, the ID “01010” assigned to the ID tag 1 c is generated and determined in the ID generation unit 42 of the reading device 5.

In the above-described embodiment, a rectangular resin layer 4 larger than the outer shape of the antennas 3a to 3e is laminated on the

antennas

3a, 3c, 3d, and 3e, so that these

antennas

3a, 3c, 3d, and 3e are stacked. Although the resin layer 4 is disposed so as to face the antenna layer 3a to 3e, the resin layer 4 having the same shape as the antennas 3a to 3e may be used, or the rectangular resin layer 4 smaller than the outer shape of the antennas 3a to 3e may be used. Good. However, when the rectangular resin layer 4 smaller than the outer shape of the antennas 3a to 3e is used, the degree of reduction in the reflection intensity from the antennas 3a to 3e is weakened.
Further, in order to make the resonance frequencies of the plurality of antennas formed on the base substrate different from each other, not only the longitudinal lengths of the plurality of antennas are different from each other as described above, but also the same outer shape. However, it is also conceivable to make the slit lengths different from each other.

In the above-described embodiment, the plurality of antennas can be identified by making the resonance frequencies of the plurality of antennas different from each other. However, by changing the directions of the antennas, the polarization directions can be made different for each antenna. The antenna may be identified by the polarization direction. In that case, priority is given to the polarization direction, and individual IDs are arranged in an order according to the priority.
The shape of the antenna is not limited to that having a rectangular outer shape and having a slit in the longitudinal direction from one of its short sides as shown in the above-described embodiment.
Further, in the above-described embodiment, the individual ID for the antenna for which it is determined that the resonance frequency has been detected is “1”, and the individual ID for the antenna for which it has been determined that the resonance frequency has not been detected is “0”. By arranging “1” and “0” in the order of the resonance frequency, the ID assigned to the ID tag is generated and discriminated, but the individual ID for the antenna that is determined to have detected the resonance frequency is “0”. “,” And “1” as the individual ID for the antenna for which it was determined that the resonance frequency was not detected. By arranging these “0” and “1” in the order of the resonance frequency, the ID assigned to the ID tag can be changed. Generation and discrimination may be performed.

In the above-described embodiment, at least one conductive antenna selected according to the ID among the plurality of conductive antennas has (relative dielectric constant) × (dielectric loss tangent at a frequency of 10 GHz) × (film thickness [ μm]) A dielectric whose loss factor calculated from ^1/2 is 0.75 or more is placed facing each other, and the resonant frequency is detected by the reflected wave from the conductive antenna on which the dielectric is placed facing. Although the ID is generated by adopting a configuration that is not used, the conductive antenna formed on the base substrate has a sealing agent for sealing the conductive antenna and a non-metallic dielectric different from the base substrate. The frequency characteristics of the conductive antenna can be changed by simply arranging the bodies facing each other, and a desired ID can be generated by utilizing the change in the frequency characteristics.

Claims

A discriminator that is formed by forming a conductive antenna on a base substrate, and that can identify a given ID using at least the resonance frequency of the conductive antenna,
A discriminating body in which a non-metal dielectric different from a sealing agent for sealing the conductive antenna and the base base material is disposed opposite to the conductive antenna.
An identifier that is formed on a base substrate and that can identify an ID using a plurality of conductive antennas having different resonance frequencies or polarization directions,
Loss calculated from (relative dielectric constant) × (dielectric loss tangent) × (film thickness [μm]) 1/2 in at least one conductive antenna selected according to the ID among the plurality of conductive antennas. An identification body in which dielectrics having a coefficient of 0.75 or more are arranged to face each other.
An ID generation method for generating an ID using an identifier formed by forming a plurality of conductive antennas having different resonance frequencies or polarization directions on a base substrate,
Loss calculated from (relative dielectric constant) × (dielectric loss tangent) × (film thickness [μm]) 1/2 in at least one conductive antenna selected according to the ID among the plurality of conductive antennas. A process of reducing the reflection intensity in the reflected wave from the conductive antenna by arranging the dielectrics having a coefficient of 0.75 or more to face each other;
A process of transmitting electromagnetic waves to the plurality of conductive antennas and receiving reflected waves of the electromagnetic waves from the plurality of conductive antennas;
The individual ID of the conductive antenna for which it is determined that the resonance frequency or polarization direction is detected based on the reflection intensity in the reflected wave is the first identifier, and the conductivity for which it is determined that the resonance frequency or polarization direction is not detected. An ID generation method comprising: processing an individual ID for an antenna as a second identifier and arranging the individual IDs in a predetermined order.