WO2018110201A1 - Discriminating medium - Google Patents

Discriminating medium Download PDF

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Publication number
WO2018110201A1
WO2018110201A1 PCT/JP2017/041436 JP2017041436W WO2018110201A1 WO 2018110201 A1 WO2018110201 A1 WO 2018110201A1 JP 2017041436 W JP2017041436 W JP 2017041436W WO 2018110201 A1 WO2018110201 A1 WO 2018110201A1
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WO
WIPO (PCT)
Prior art keywords
antenna
resonance peak
antennas
tag
ground pattern
Prior art date
Application number
PCT/JP2017/041436
Other languages
French (fr)
Japanese (ja)
Inventor
裕 出口
岳央 道坂
Original Assignee
トッパン・フォームズ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by トッパン・フォームズ株式会社 filed Critical トッパン・フォームズ株式会社
Publication of WO2018110201A1 publication Critical patent/WO2018110201A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P7/00—Resonators of the waveguide type
    • H01P7/08—Strip line resonators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/14—Reflecting surfaces; Equivalent structures

Definitions

  • the present invention relates to an identification body capable of recognizing identification information using an antenna.
  • 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 peak frequencies, and a plurality of antennas without using the IC chip.
  • a device that can recognize an ID by a combination of antennas is also considered.
  • the shape of the dielectric element and the capacitor element constituting the plurality of antennas may be different, or the shape and direction of the plurality of antennas may be different to change the resonance peak frequency for each of the plurality of antennas.
  • Patent Documents 1 and 2 disclose techniques that allow IDs to be expressed in combination.
  • an identification body using the RFID technology as described above is often used in a state where it is in contact with a dielectric, for example, affixed to a product managed using the identification body.
  • a dielectric for example, affixed to a product managed using the identification body.
  • the frequency characteristics of the discriminator change due to the influence of the dielectric, and the resonance peak becomes gradual and cannot be detected, or the frequency of the resonance peak is greatly shifted. There is a risk of being unable to recognize.
  • the present invention has been made in view of the problems of the conventional techniques as described above, and the identification information can be obtained without reducing the convenience even when used in contact with a dielectric. It is an object to provide an identifier that can be recognized correctly.
  • the present invention provides: A conductive layer; An antenna that is provided opposite to each of the front and back surfaces of the conductive layer via an insulating layer, and that exhibits a resonance peak by facing the conductive layer;
  • the conductive layer has a shape that covers the antenna in a plan view.
  • a resonance peak appears when the antenna faces the conductive layer, and the identification body is used in contact with a dielectric material such as affixed to a product.
  • the conductive layer is interposed between the antenna and the dielectric, it is avoided that the influence of the dielectric affects the frequency characteristics of the discriminator, thereby preventing the frequency characteristics of the discriminator from changing. Therefore, the identification information is recognized correctly. In that case, since the antenna is provided opposite to each of the front and back sides of the conductive layer via the insulating layer, the identification information can be recognized from any surface of the identification body.
  • the antenna when the Q value in a state where it does not face the conductive layer is 30 or less, a sharp resonance peak with a Q value of 30 or more can be expressed by facing the conductive layer.
  • the front and back of the identifier are determined. Or two pieces of identification information can be represented depending on the method of use.
  • the resonance peak frequency that appears when the antenna faces the conductive layer is different for each of the plurality of regions,
  • Each of the plurality of regions is one of a region where the antenna is provided and a region where the antenna is not provided, and in the region where the antenna is provided, by facing the conductive layer of the antenna In the region where the expressed resonance peak is detected and the antenna is not provided, the resonance peak is not detected and is not detected, and identification information including a combination of these binary information can be expressed.
  • the antenna when the antenna is opposed to the conductive layer, a resonance peak appears, and when the identifier is used in contact with a dielectric material such as affixed to a product or the like, the antenna and the dielectric material are used.
  • the conductive layer By interposing the conductive layer between them, the frequency characteristics of the discriminator are prevented from changing due to the influence of the dielectric, and the discriminating information can be correctly recognized by detecting the resonance peak.
  • the identification information can be recognized from any surface of the identification body and is in contact with the dielectric Even if it is a case where it is used, identification information can be correctly recognized without deteriorating convenience.
  • the front and back sides of the identifier are determined. Or two pieces of identification information can be represented depending on the method of use.
  • the frequency of the resonance peak that appears when the antenna faces the conductive layer is different for each of the plurality of regions. Since each of the regions is either one of the region where the antenna is provided and the region where the antenna is not provided, binary information based on the region where the resonance peak is detected and the region where the resonance peak is not detected It is possible to express identification information consisting of a combination of
  • 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 back surface of an example of the basic form of the identification body of this invention. It is a figure which shows the frequency characteristic of the state in which the ID tag by which an antenna is formed only in one surface of one base base material is not in contact with a dielectric material. It is a figure which shows the frequency characteristic of the state in which the ID tag by which an antenna is formed only in one side of one base base material is in contact with the dielectric.
  • FIG. 2 is a diagram showing frequency characteristics when the ID tag shown in FIGS. 1a to 1c is not in contact with a dielectric.
  • FIG. 2 is a diagram showing frequency characteristics when an ID is read from one side of the ID tag shown in FIGS. 1a to 1c.
  • FIG. 2 is a diagram showing a surface configuration of an application example of the ID tag shown in FIGS. 1a to 1c.
  • FIG. 6B is a cross-sectional view taken along the line A-A ′ shown in FIG. 6A.
  • FIG. 2 is a diagram showing a configuration of a back surface of an application example of the ID tag shown in FIGS. 1a to 1c.
  • FIG. 6 is a diagram showing an example of an ID recognition system that recognizes an ID assigned to an ID tag shown in FIGS. 6a to 6c.
  • FIG. 8B is a cross-sectional view taken along the line A-A ′ shown in FIG. 8a. It is a figure which shows the structure of the back surface of the other example of the basic form of the identification body of this invention.
  • FIG. 9 is a diagram for explaining frequency characteristics of the ID tag shown in FIGS. 8a to 8c.
  • FIG. 2 is a surface view showing a practical example of the ID tag shown in FIGS. 1a to 1c.
  • FIG. 10b is a cross-sectional view taken along the line A-A 'shown in FIG. 10a.
  • FIG. 2 is a surface view showing a modified practical example of the ID tag shown in FIGS. 1a to 1c.
  • FIG. 11B is a cross-sectional view taken along the line A-A ′ shown in FIG. 11 a.
  • FIG. 1a is a diagram showing a surface configuration of an example of a basic form of an identifier of the present invention.
  • FIG. 1B is a cross-sectional view taken along line A-A ′ shown in FIG.
  • FIG. 1c is a diagram showing the configuration of the back surface of an example of the basic form of the identifier of the present invention.
  • the identification body in this embodiment is formed by laminating a base substrate 10a provided with an antenna region 31 and a base substrate 10b provided with an antenna region 32 via a ground pattern 40.
  • Each of the base substrates 10a and 10b serves as an insulating layer in the present invention, and is made of an insulating material having the same shape and a thickness of about 200 to 300 ⁇ m.
  • a resin film or the like can be considered as the insulating material, but a material having a small dielectric loss tangent is preferable.
  • the insulating layer may be configured by applying an insulating resin film without using the base substrates 10a and 10b.
  • the antenna regions 31 and 32 are provided on the surface opposite to the surface of the base base material 10a or 10b on which the ground pattern 40 is laminated, and the antennas 21 and 22 made of a conductive material are formed.
  • the antennas 21 and 22 are provided so as to face each other on the front and back of the ground pattern 40 via the base substrates 10a and 10b.
  • Each of the antennas 21 and 22 has a rectangular outer shape, and has a shape in which a slit enters the longitudinal direction from one of its short sides.
  • the antenna regions 31 and 22 have the same shape and the same direction. 32. Then, the antennas 21 and 22 are opposed to the ground pattern 40, thereby expressing a resonance peak at a frequency corresponding to the shape of the antennas 21 and 22.
  • the ground pattern 40 serves as a conductive layer in the present invention, and is formed on the entire surface of at least one of the laminated surfaces of the base substrate 10a and the base substrate 10b between the base substrates 10a and 10b. Thus, the antennas 21 and 22 are covered in a plan view.
  • the antennas 21 and 22 are opposed to the ground pattern 40 so that a resonance peak appears at a frequency corresponding to the shape of the antennas 21 and 22.
  • the ID assigned to the ID tag 1 can be recognized depending on whether a resonance peak is detected in the vicinity of the frequency corresponding to the shape of the antennas 21 and 22. Specifically, if the antennas 21 and 22 are formed in the antenna areas 31 and 32, respectively, a resonance peak is detected. Therefore, the ID at that time is set to “1”, and any of the antenna areas 31 and 32 is set. Since the resonance peak is not detected if the antennas 21 and 22 are not formed, the ID can be recognized by setting the ID at that time to “0”. A detailed description of the fact that the antennas 21 and 22 exhibit a resonance peak by facing the ground pattern 40 will be described later.
  • FIG. 2a is a diagram showing frequency characteristics in a state where an ID tag in which an antenna is formed only on one surface of one base substrate is not in contact with a dielectric.
  • FIG. 2B is a diagram illustrating frequency characteristics in a state where an ID tag in which an antenna is formed on only one surface of one base substrate is in contact with a dielectric.
  • an electromagnetic wave is irradiated from the surface side where the antenna is formed in a state where it is not in contact with a dielectric, and the reflected wave is received.
  • the frequency characteristic of the reflected wave is as shown by the solid line in FIG. 2a
  • the reflected wave is received by irradiating the electromagnetic wave from the side opposite to the surface where the antenna is formed.
  • the frequency characteristic of the reflected wave is as shown by the broken line in FIG. 2a, and the frequency characteristic hardly changes, and the ID due to the resonance peak of the antenna can be correctly recognized from any surface of the ID tag.
  • the frequency characteristics of the reflected wave when not in contact with the dielectric are as shown by the solid line in FIG. 2b.
  • the frequency characteristic of the reflected wave becomes as shown by the broken line in FIG. It will change greatly under the influence, and the ID due to the resonance peak of the antenna cannot be recognized correctly.
  • an antenna similar to that shown in FIGS. 1a to 1c is formed on only one surface of one base substrate, and the same as that shown in FIGS. 1a to 1c is formed on the entire other surface.
  • frequency characteristics of an ID tag formed with a ground pattern will be described.
  • FIG. 3a shows an ID tag in which an antenna is formed only on one surface of one base substrate and a ground pattern is formed on the other surface, and ID is read from the surface where the antenna is formed. It is a figure which shows the frequency characteristic in the case of.
  • FIG. 3b shows an ID tag in which an antenna is formed only on one surface of a single base substrate and a ground pattern is formed on the entire other surface, and ID reading is performed from the surface side where the ground pattern is formed. It is a figure which shows the frequency characteristic at the time of performing.
  • an ID tag in which an antenna is formed only on one surface of one base substrate and a ground pattern is formed on the entire other surface, the surface on which the antenna is formed without being in contact with a dielectric.
  • the electromagnetic wave is irradiated from the side and the reflected wave is received, and the frequency characteristic of the reflected wave is as shown by the solid line in FIG. 3a, the antenna is in contact with a dielectric such as a human hand.
  • the frequency characteristic of the reflected wave is as shown by the broken line in FIG. It is possible to correctly recognize the ID due to the resonance peak of the antenna regardless of whether it is in contact with the antenna.
  • an ID tag in which an antenna is formed only on one surface of a single base substrate and a ground pattern is formed on the entire surface of the other surface, electromagnetic waves are irradiated from the surface on which the antenna is formed.
  • the reflected wave is received, even if the frequency characteristic of the reflected wave is as indicated by the solid line in FIG. 3b, if the reflected wave is received by irradiating the electromagnetic wave from the surface side on which the ground pattern is formed, Is cut off by the ground pattern, and the frequency characteristic of the reflected wave becomes as shown by the broken line in FIG. 3b, and the resonance peak does not exist in the frequency characteristic, and the ID due to the resonance peak of the antenna cannot be recognized.
  • FIG. 4a is a diagram showing frequency characteristics in a state where the ID tag 1 shown in FIGS. 1a to 1c is not in contact with a dielectric.
  • FIG. 4b is a diagram showing frequency characteristics when the ID is read from one side of the ID tag 1 shown in FIGS. 1a to 1c.
  • the frequency characteristic of the reflected wave is obtained. Is as shown by a solid line in FIG. 4a, and has a resonance peak in a region surrounded by a dotted line in the figure.
  • the frequency characteristic is as shown by a broken line in FIG. 4a, and the frequency characteristic is hardly changed, and similarly has a resonance peak in a region surrounded by a dotted line in the figure.
  • the reflected wave may be received by irradiating the electromagnetic wave from the surface side on which the antenna 21 is formed without being in contact with the dielectric.
  • the electromagnetic wave is irradiated from the surface side on which the antenna 22 is formed and the reflected wave is received, the frequency characteristics hardly change, and a resonance peak appears at the same frequency.
  • the antennas 21 and 22 have the same shape and are formed on the base substrates 10a and 10b in the same direction, respectively, and when electromagnetic waves are irradiated from one surface, This is because the electromagnetic wave is blocked by the ground pattern 40 and the reflected wave is received without being influenced by the antenna on the other surface.
  • the ID tag 1 shown in FIGS. 1a to 1c when the reflected wave is received by irradiating the electromagnetic wave from the surface side where the antenna 21 is formed in a state where the antenna is not in contact with the dielectric,
  • the frequency characteristic is as shown by the solid line in FIG. 4b
  • the reflected wave was received by irradiating the electromagnetic wave from the surface side on which the antenna 21 was formed in contact with a dielectric such as a human hand.
  • the frequency characteristic of the reflected wave is as shown by the broken line in FIG. 4b, and the frequency characteristic is hardly changed, and has a resonance peak in the region surrounded by the dotted line in the figure, and is in contact with the dielectric. It is possible to recognize the ID due to the resonance peak of the antenna regardless of whether or not it is present. This is the same even when an electromagnetic wave is irradiated from the surface side where the antenna 22 is formed and the reflected wave is received.
  • the electromagnetic wave is still in contact with the dielectric.
  • the frequency characteristics hardly change and a resonance peak appears at the same frequency.
  • a resonance peak appears at a frequency corresponding to the shape of the antennas 21 and 22, and the dielectric 21 is in contact with the dielectric. This is because the influence of the dielectric is blocked by the ground pattern 40 even in this case.
  • the antennas 21 and 22 are provided to face the front and back of the ground pattern 40 via the base materials 10a and 10b, respectively. Therefore, even when an electromagnetic wave is irradiated from the surface side on which the antenna 21 is formed and the reflected wave is received, the reflected wave is received by irradiating the electromagnetic wave from the surface side on which the antenna 22 is formed.
  • the frequency characteristics hardly change, and a resonance peak appears at the same frequency, and when the reflected wave is received by irradiating an electromagnetic wave without being in contact with the dielectric, When the reflected wave is received by irradiating an electromagnetic wave in contact with the dielectric, the frequency characteristics hardly change and a resonance peak appears at the same frequency. Even if the resonance peaks of the antennas 21 and 22 are detected correctly, and the identification information based on the resonance peaks is correctly used even when the ID tag 1 is used in contact with the dielectric, the convenience is not lowered. Can be recognized.
  • the antennas 21 and 22 exhibit a resonance peak by facing the ground pattern 40.
  • FIG. 5a is a diagram showing characteristics of an antenna in which a resonance peak does not appear when facing a ground pattern.
  • FIG. 5B is a diagram illustrating the characteristics of an antenna in which a resonance peak appears by facing the ground pattern.
  • the Q value is the frequency at the resonance peak at ⁇ 0 , the frequency at which the vibration energy is half the resonance peak at the lower frequency side than the resonance peak is ⁇ 1, and at the higher frequency side from the resonance peak.
  • the frequency at which the vibration energy is half the resonance peak is ⁇ 2
  • the antennas 21 and 22 shown in FIGS. 1a to 1c that is, the Q value in a state where the antennas 21 and 22 do not face the ground pattern 40 are 30 or less, face the ground pattern 40.
  • a sharp resonance peak having a Q value of 30 or more appears.
  • FIG. 6a is a diagram showing a surface configuration of an application example of the ID tag 1 shown in FIGS. 1a to 1c.
  • 6b is a cross-sectional view taken along the line A-A 'shown in FIG. 6a.
  • FIG. 6c is a diagram showing the configuration of the back surface of the application example of the ID tag 1 shown in FIGS. 1a to 1c.
  • a base substrate 110a provided with five antenna regions 131a to 131e and a base substrate 110b provided with five antenna regions 132a to 132e are grounded.
  • the ID tag 101 is configured by being stacked via a pattern 140.
  • Each of the base substrates 110a and 110b is composed of the same material as the base substrates 10a and 10b shown in FIGS. 1a to 1c, for example.
  • the antenna regions 131a to 131e and the antenna regions 132a to 132e are provided on the surfaces of the base substrates 110a and 110b opposite to the laminated surface with the ground pattern 140 so as to face each other.
  • the antenna areas 131a to 131e and 132a to 132e are assigned different frequencies.
  • a frequency of 7.0 GHz is assigned to the antenna areas 131a and 132a
  • a frequency of 8.0 GHz is assigned to the antenna areas 131b and 132b
  • the antenna areas 131c and 132c are assigned to the antenna areas 131c and 132c.
  • a frequency of 9.0 GHz is assigned
  • a frequency of 10.0 GHz is assigned to the antenna regions 131d and 132d
  • a frequency of 11.0 GHz is assigned to the antenna regions 131e and 132e.
  • the ground pattern 140 is formed on the entire surface of at least one of the laminated surfaces of the base substrate 110a and the base substrate 110b between the base substrates 110a and 110b.
  • the antenna areas 131a and 132a are formed with antennas 121a and 122a, respectively, which are opposed to the ground pattern 140 and exhibit resonance peaks in the vicinity of 7.0 GHz assigned to the antenna areas 131a and 132a.
  • the antenna regions 131b and 132b are formed with antennas 121b and 122b, respectively, which are opposed to the ground pattern 140 and exhibit resonance peaks in the vicinity of 8.0 GHz allocated to the antenna regions 131b and 132b.
  • the antenna regions 131c and 132c are formed with antennas 121c and 122c, respectively, which are opposed to the ground pattern 140 and exhibit a resonance peak in the vicinity of 9.0 GHz allocated to the antenna regions 131c and 132c.
  • Antennas are not formed in the antenna regions 131d and 132d.
  • the antenna regions 131e and 132e are formed with antennas 121e and 122e, respectively, which are opposed to the ground pattern 140 and exhibit a resonance peak in the vicinity of 11.0 GHz assigned to the antenna regions 131e and 132e.
  • the antennas formed in these antenna regions 131a to 131e and 132a to 132e have a rectangular outer shape similar to that shown in FIGS. 1a to 1c, and a slit enters the longitudinal direction from one of the short sides. However, since the lengths in the longitudinal direction are different, resonance peaks appear at different frequencies by facing the ground pattern.
  • the antennas formed in the antenna regions 131a, 131b, 131d, 131e, 132a, 132b, 132d, and 132e have the same longitudinal direction.
  • the antennas formed in the antenna regions 131c and 132c have a longitudinal direction orthogonal to them and serve as a reference antenna.
  • the antennas formed in the antenna regions 131a, 131b, 131d, 131e, 132a, 132b, 132d, and 132e and the antennas formed in the antenna regions 131c and 132c are polarized by having their longitudinal directions orthogonal to each other. The directions are different from each other.
  • FIG. 7 is a diagram showing an example of an ID recognition system that recognizes the ID assigned to the ID tag 101 shown in FIGS. 6a to 6c.
  • the ID recognition system in this example includes the ID tag 101 shown in FIGS. 6a to 6c and a reader 50 that recognizes the ID assigned to the ID tag 101.
  • the reader 50 transmits The antenna 51a, the reception antenna 51b, the transmission unit 52, the reception unit 53, the processing unit 54, and the control unit 55 are included.
  • the transmission unit 52 generates electromagnetic waves including frequencies assigned to the antenna regions 131a to 131e and 132a to 132e, and irradiates them through the transmission antenna 51a.
  • the receiving unit 53 receives the reflected wave from the ID tag 101 with respect to the electromagnetic wave irradiated from the transmitting unit 52 via the transmitting antenna 51a via the receiving antenna 51b, and detects the level of the received power of the reflected wave.
  • the processing unit 54 detects the resonance peak in the ID tag 101 based on the level of received power detected by the receiving unit 53, and detects the resonance peak among the frequencies assigned to the antenna regions 131a to 131e and 132a to 132e.
  • the individual ID for the generated frequency is set to “1”
  • the individual ID for the frequency for which the resonance peak is not detected is set to “0”
  • these “1” and “0” are arranged in the order of the frequencies, thereby obtaining the ID.
  • the ID assigned to the tag 101 is recognized.
  • the antennas 121c and 122c formed in the antenna regions 131c and 132c are polarized with respect to the antennas formed in the antenna regions 131a, 131b, 131d, 131e, 132a, 132b, 132d, and 132e, as described above. Since the directions are different, the antennas 121c and 122c are used as reference antennas.
  • the control unit 55 controls the irradiation of electromagnetic waves in the transmission unit 52 and each process in the processing unit 54.
  • the transmitting unit 52 uses 7.0 GHz to 11 assigned to the antenna regions 131a to 131e and 132a to 132e.
  • the electromagnetic wave of the said frequency band is irradiated to the ID tag 101 via the transmission antenna 51a, sweeping the frequency band containing 0.0 GHz.
  • the reflected wave from the ID tag 101 is received by the receiving unit 53 via the receiving antenna 51b, and the level of the received power of the reflected wave is detected.
  • the processing unit 54 the reception detected by the receiving unit 53 is detected.
  • a resonance peak is detected depending on the power level.
  • antennas 121a and 122a in which a resonance peak appears in the vicinity of 7.0 GHz are formed in the antenna regions 131a and 132a, and the antenna regions 131b and 132b.
  • the antennas 121b and 122b having a resonance peak in the vicinity of 8.0 GHz are formed, and the antennas 121c and 122c having a resonance peak in the vicinity of 9.0 GHz are formed in the antenna regions 131c and 132c.
  • 132e are formed with antennas 121e, 122e having a resonance peak in the vicinity of 11.0 GHz, so that the received power of the reflected wave received by the receiving unit 53 is 7.0 GHz, 8.0 GHz, 9 Resonance peak at 0.0 GHz and 11.0 GHz .
  • the processing unit 54 sets the individual ID for the frequency at which the resonance peak is detected at an interval of 1 GHz.
  • the ID is set to “1”
  • the individual ID for the frequency for which the resonance peak is not detected is set to “0”
  • “1” and “0” that are the binary information are arranged in the order of, for example, the lowest frequency, thereby the ID tag.
  • the ID assigned to 101 is recognized. In the ID tag 101 shown in FIGS. 6a to 6c, as described above, the resonance peak is detected at 7.0 GHz, 8.0 GHz, 9.0 GHz, and 11.0 GHz.
  • ID “11101” is recognized in which “,” “1,” “1,” “0,” “1” are arranged in this order.
  • the 9.0 GHz resonance peak is due to the reference antennas 121c and 122c having a polarization direction different from that of the other antennas, so that it can be distinguished from the other resonance peaks. Therefore, by forming the antennas 121c and 122c in the antenna regions 131c and 132c without fail, the individual IDs are arranged so that the individual ID “1” due to the resonance peak of the antennas 121c and 122c is in the center.
  • the processing unit 54 detects Even when the resonance peak is slightly shifted, the ID assigned to the ID tag 101 can be accurately recognized.
  • the polarization direction is different if the waveform of the reflected wave is different from the reflected wave from the other antenna. Not limited to
  • a ground pattern 140 is provided on at least one of the laminated surfaces of the base substrate 110a and the base substrate 110b between the base substrates 110a and 110b.
  • the antenna regions 131a to 131e and 132a to 132e are opposed to each other between at least one of the laminated surfaces of the base substrate 110a and the base substrate 110b between the base substrates 110a and 110b.
  • the ground pattern 140 may be laminated so as to cover the antenna regions 131a to 131e and 132a to 132e, respectively.
  • the ground pattern may be one that does not cover a very small area of the antenna that is opposed to each other in plan view, and is defined as having a shape that covers the antenna in plan view.
  • frequencies are allocated to the antenna regions 131a to 131e and 132a to 132e, respectively, and the antenna regions 131a to 131c, 131e, 132a to 132c, and 132e are grounded.
  • the antennas 121a to 121c, 121e, 122a to 122c, and 122e in which resonance peaks appear in the vicinity of the frequencies assigned to the antenna regions 131a to 131c, 131e, 132a to 132c, and 132e are formed.
  • the antenna regions 131a to 131e and 132a to 132e Respectively Even if no assigned frequency, by arranging the individual ID determined by whether the resonance peak is detected, it is possible to recognize the ID assigned to the ID tag.
  • FIG. 8a is a diagram showing the surface configuration of another example of the basic form of the discriminating body of the present invention.
  • FIG. 8b is a cross-sectional view taken along the line A-A 'shown in FIG. 8a.
  • FIG. 8 c is a diagram showing the configuration of the back surface of another example of the basic form of the identifier of the present invention.
  • the identification body in this embodiment differs from the ID tag 1 shown in FIGS. 1a to 1c in the size of the antenna 222 formed in the antenna region 32 of the base substrate 10b. This is the ID tag 201.
  • the antenna 21 formed in the antenna region 31 of the base substrate 10a and the antenna 222 formed in the antenna region 32 of the base substrate 10b have a length in the longitudinal direction of each other.
  • the frequencies of the resonance peaks that appear when facing the ground pattern 40 are different from each other.
  • FIG. 9 is a diagram for explaining the frequency characteristics of the ID tag 201 shown in FIGS. 8a to 8c.
  • the frequency characteristic of the reflected wave is as shown by the solid line in FIG. Furthermore, it has a resonance peak in the vicinity of 8.3 GHz according to the shape of the antenna 21.
  • the frequency characteristic of the reflected wave is different from the shape of the antenna 21 in FIG. As indicated by the broken line, a resonance peak is present in the vicinity of 7.7 GHz according to the shape of the antenna 222.
  • the electromagnetic wave when the electromagnetic wave is irradiated from the surface side on which the antenna 21 is formed and the reflected wave is received, the electromagnetic wave does not penetrate the antenna 222 side by the ground pattern 40, and the antenna 222 is not affected by the antenna 222.
  • the resonance peak due to only the frequency characteristic of the antenna 21 appears, and when the reflected wave is received by irradiating the electromagnetic wave from the surface side where the antenna 222 is formed, the electromagnetic wave penetrates the antenna 21 side by the ground pattern 40. This is because a resonance peak due to only the frequency characteristic of the antenna 222 appears without being affected by the antenna 21.
  • the antennas 21 and 222 provided to face the front and back of the ground pattern 40 via the base substrates 10a and 10b are manifested by facing the ground pattern 40. Since the resonance peak frequencies are different from each other, the front and back of the ID tag 201 can be determined. Also, two IDs, an ID corresponding to the resonance peak due to the antenna 21 and an ID corresponding to the resonance peak due to the antenna 222, can be expressed according to the usage method of the ID tag 201.
  • FIG. 10a is a surface view showing a practical example of the ID tag 1 shown in FIGS. 1a to 1c.
  • FIG. 10B is a cross-sectional view taken along the line A-A ′ shown in FIG. 10A.
  • the ID tag 1 shown in FIGS. 1a to 1c is sandwiched from the front and back by two surface base materials 61a and 61b made of an insulating material such as a resin as shown in FIGS. 10a and 10b. 60 can be used.
  • the surface base 61a is laminated on the surface of the base base 10a on which the antenna 21 is formed, and the base base 10a and the surface base 61a are bonded by the adhesive layer 70a.
  • the base substrate 10b is laminated on the surface of the base substrate 10b on which the antenna 22 is formed, and the base substrate 10b and the surface substrate 61b are bonded together by the adhesive layer 70b to form the chipless card 60. It is possible to do.
  • the base substrates 10a and 10b and the surface substrates 61a and 61b may be bonded by means such as fusion without depending on the adhesive layers 70a and 70b.
  • the ID tag 1 shown in FIGS. 1a to 1c is built-in, so that even if it is in contact with a dielectric such as a human hand, it can be Even if an electromagnetic wave is irradiated from the surface side of the antenna and the reflected wave is received, the resonance peak by the antennas 21 and 22 can be detected, and the ID can be recognized correctly.
  • FIG. 11a is a surface view showing a modified practical example of the ID tag 1 shown in FIGS. 1a to 1c.
  • FIG. 11b is a cross-sectional view taken along the line A-A 'shown in FIG. 11a.
  • a thin case-like frame member 161 made of an insulating material such as resin is provided with a conductive plate 140 instead of the ground pattern 40 shown in FIGS. 1a to 1c.
  • the chipless card 160 is accommodated and provided with antennas 21 and 22 facing the conductive plate 140.
  • the conductive plate 140 is disposed at an intermediate point between the top surface and the bottom surface of the frame member 161, the antenna 21 is disposed on the inner surface of the top surface of the frame member 161, and the antenna 22 is disposed on the bottom surface of the frame member 161. Each is formed on the inner surface. As a result, spaces 110 a and 110 b serving as insulating layers are formed between the antennas 21 and 22 and the conductive plate 140, respectively.
  • the antennas 21 and 22 that exhibit resonance peaks when facing the conductive plate 140 are connected to the front and back surfaces of the conductive plate 140 via the spaces 110a and 110b serving as insulating layers. Even if the conductive plate 140 has a shape that covers the antennas 21 and 22 in a plan view, both surfaces of the front and back sides are provided, facing each other. Even if an electromagnetic wave is irradiated from the side and the reflected wave is received, the resonance peak by the antennas 21 and 22 can be detected, and the ID can be recognized correctly.

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Abstract

The present invention correctly recognizes identification information without causing convenience to decrease even when used in a state of being in contact with a dielectric. The present invention has a ground pattern 40, and antennas 21, 22 provided facing the surface and the reverse side of the ground pattern 40 via base substrates 10a, 10b, respectively, for causing a resonant peak to appear due to the antennas 21, 22 facing the ground pattern 40. The ground pattern 40 has a shape of covering the antennas 21, 22 in a plan view.

Description

識別体Identifier
　本発明は、アンテナを用いて識別情報を認識可能とする識別体に関する。 The present invention relates to an identification body capable of recognizing identification information using an antenna.
　昨今、情報化社会の進展に伴って、商品等に貼付されるラベルやタグに情報を記録し、このラベルやタグを用いて商品等の管理が行われている。このようなラベルやタグを用いた情報管理においては、ラベルやタグに対して非接触状態にて情報の書き込みや読み出しを行うことが可能なＩＣチップが搭載された非接触型ＩＣラベルや非接触型ＩＣタグ等のＲＦＩＤ技術を利用した識別体がその優れた利便性から急速な普及が進みつつある。 Recently, 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 these 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.
　このようなＲＦＩＤ技術を利用した識別体としては、上述したようにＩＣチップが搭載されたものに限らず、共振ピークの周波数が互いに異なる複数のアンテナを有し、ＩＣチップを用いずに複数のアンテナの組み合わせでＩＤを認識できるようにしたものも考えられている。例えば、複数のアンテナを構成する誘電子要素とコンデンサ要素の形状を異ならせたり、複数のアンテナの形状や向きを異ならせたりして共振ピークの周波数を複数のアンテナ毎に異ならせ、そのアンテナの組み合わせでＩＤを表現可能とする技術が、特許文献１，２に開示されている。この技術を用いれば、アンテナの数をＮ個とした場合、１つのアンテナの有無によって“１”，“０”の２つの情報を持たせることができ、また、全てのアンテナが無い場合を除いて、（２N－１）個のＩＤを認識可能に表現することができる。 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 peak frequencies, and a plurality of antennas without using the IC chip. A device that can recognize an ID by a combination of antennas is also considered. For example, the shape of the dielectric element and the capacitor element constituting the plurality of antennas may be different, or the shape and direction of the plurality of antennas may be different to change the resonance peak frequency for each of the plurality of antennas. Patent Documents 1 and 2 disclose techniques that allow IDs to be expressed in combination. If this technology is used, if the number of antennas is N, two information of “1” and “0” can be given depending on the presence / absence of one antenna, and there is no case where all antennas are not present. Thus, (2 N −1) IDs can be expressed in a recognizable manner.
特公平７－８０３８６号公報Japanese Patent Publication No. 7-80386 特表２００８－５０３７５９号公報Special table 2008-503759 gazette
　ところで、上述したようなＲＦＩＤ技術を利用した識別体は、識別体を用いて管理される商品等に貼付される等、誘電体に接触した状態で使用される場合が多い。その場合、誘電体の影響で識別体の周波数特性が変化し、共振ピークが緩やかなものとなって検出されなくなったり、共振ピークの周波数が大きくシフトしたりして、識別情報となるＩＤを正しく認識することができなくなってしまう虞がある。 By the way, an identification body using the RFID technology as described above is often used in a state where it is in contact with a dielectric, for example, affixed to a product managed using the identification body. In that case, the frequency characteristics of the discriminator change due to the influence of the dielectric, and the resonance peak becomes gradual and cannot be detected, or the frequency of the resonance peak is greatly shifted. There is a risk of being unable to recognize.
　本発明は、上述したような従来の技術が有する問題点に鑑みてなされたものであって、誘電体に接触した状態で使用される場合であっても利便性を低下させることなく識別情報を正しく認識することができる識別体を提供することを目的とする。 The present invention has been made in view of the problems of the conventional techniques as described above, and the identification information can be obtained without reducing the convenience even when used in contact with a dielectric. It is an object to provide an identifier that can be recognized correctly.
　上記目的を達成するために本発明は、
　導電層と、
　絶縁層を介して前記導電層の表裏のそれぞれに対向して設けられ、前記導電層と対向することで共振ピークが発現するアンテナとを有し、
　前記導電層は、平面視にて前記アンテナを覆う形状を有する。 In order to achieve the above object, the present invention provides:
A conductive layer;
An antenna that is provided opposite to each of the front and back surfaces of the conductive layer via an insulating layer, and that exhibits a resonance peak by facing the conductive layer;
The conductive layer has a shape that covers the antenna in a plan view.
　上記のように構成された本発明においては、アンテナが導電層と対向することで共振ピークが発現するとともに、識別体が商品等に貼付される等、誘電体に接触した状態で使用される場合に、アンテナと誘電体との間に導電層が介在することで、誘電体の影響が識別体の周波数特性に及ぶことが回避され、それにより、識別体の周波数特性が変化することが回避され、識別情報が正しく認識されることとなる。その際、アンテナが、絶縁層を介して導電層の表裏のそれぞれに対向して設けられているため、識別体のいずれの面からも識別情報を認識することができる。 In the present invention configured as described above, a resonance peak appears when the antenna faces the conductive layer, and the identification body is used in contact with a dielectric material such as affixed to a product. In addition, since the conductive layer is interposed between the antenna and the dielectric, it is avoided that the influence of the dielectric affects the frequency characteristics of the discriminator, thereby preventing the frequency characteristics of the discriminator from changing. Therefore, the identification information is recognized correctly. In that case, since the antenna is provided opposite to each of the front and back sides of the conductive layer via the insulating layer, the identification information can be recognized from any surface of the identification body.
　上記のようなアンテナとしては、導電層に対向しない状態におけるＱ値が３０以下であれば、導電層に対向することで、Ｑ値が３０以上となる鋭い共振ピークを発現させることができる。 As for the antenna as described above, when the Q value in a state where it does not face the conductive layer is 30 or less, a sharp resonance peak with a Q value of 30 or more can be expressed by facing the conductive layer.
　また、絶縁層を介して導電層の表裏のそれぞれに対向して設けられたアンテナが、導電層と対向することで発現する共振ピークの周波数が互いに異なるものであれば、識別体の表裏を判定することができたり、使用方法に応じて２つの識別情報を表すことができたりする。 In addition, if the antennas provided opposite to the front and back of the conductive layer via the insulating layer have different resonance peak frequencies that are manifested by facing the conductive layer, the front and back of the identifier are determined. Or two pieces of identification information can be represented depending on the method of use.
　また、アンテナが絶縁層を介して導電層に対向して設けられる複数の領域を有するものにおいては、アンテナが、導電層に対向することによって発現する共振ピークの周波数が複数の領域毎に異なり、複数の領域のそれぞれが、アンテナが設けられた領域と、アンテナが設けられていない領域とのいずれか一方であることにより、アンテナが設けられた領域においては、アンテナの導電層に対向することによって発現した共振ピークが検出され、アンテナが設けられていない領域においては、共振ピークが発現しないことで検出されず、これら２値情報の組み合わせからなる識別情報を表すことができる。 In addition, in the case where the antenna has a plurality of regions provided to face the conductive layer through the insulating layer, the resonance peak frequency that appears when the antenna faces the conductive layer is different for each of the plurality of regions, Each of the plurality of regions is one of a region where the antenna is provided and a region where the antenna is not provided, and in the region where the antenna is provided, by facing the conductive layer of the antenna In the region where the expressed resonance peak is detected and the antenna is not provided, the resonance peak is not detected and is not detected, and identification information including a combination of these binary information can be expressed.
　本発明によれば、アンテナが導電層と対向することで共振ピークが発現するとともに、識別体が商品等に貼付される等、誘電体に接触した状態で使用される場合に、アンテナと誘電体との間に導電層が介在することで、誘電体の影響によって識別体の周波数特性が変化することが回避され、共振ピークを検出することで識別情報を正しく認識することができる。その際、アンテナが、絶縁層を介して導電層の表裏のそれぞれに対向して設けられているため、識別体のいずれの面からも識別情報を認識することができ、誘電体に接触した状態で使用される場合であっても利便性を低下させることなく識別情報を正しく認識することができる。 According to the present invention, when the antenna is opposed to the conductive layer, a resonance peak appears, and when the identifier is used in contact with a dielectric material such as affixed to a product or the like, the antenna and the dielectric material are used. By interposing the conductive layer between them, the frequency characteristics of the discriminator are prevented from changing due to the influence of the dielectric, and the discriminating information can be correctly recognized by detecting the resonance peak. At that time, since the antenna is provided opposite to each of the front and back of the conductive layer through the insulating layer, the identification information can be recognized from any surface of the identification body and is in contact with the dielectric Even if it is a case where it is used, identification information can be correctly recognized without deteriorating convenience.
　また、絶縁層を介して導電層の表裏のそれぞれに対向して設けられたアンテナが、導電層と対向することで発現する共振ピークの周波数が互いに異なるものにおいては、識別体の表裏を判定することができたり、使用方法に応じて２つの識別情報を表すことができたりする。 In addition, when the antennas provided opposite to each of the front and back sides of the conductive layer through the insulating layer have different resonance peak frequencies that are manifested by facing the conductive layer, the front and back sides of the identifier are determined. Or two pieces of identification information can be represented depending on the method of use.
　また、アンテナが絶縁層を介して導電層に対向して設けられる複数の領域を有するものにおいて、アンテナが、導電層に対向することによって発現する共振ピークの周波数が複数の領域毎に異なり、複数の領域のそれぞれが、アンテナが設けられた領域と、アンテナが設けられていない領域とのいずれか一方であることにより、共振ピークが検出された領域と共振ピークが検出されない領域とによる２値情報の組み合わせからなる識別情報を表すことができる。 Further, in the case where the antenna has a plurality of regions provided to face the conductive layer through the insulating layer, the frequency of the resonance peak that appears when the antenna faces the conductive layer is different for each of the plurality of regions. Since each of the regions is either one of the region where the antenna is provided and the region where the antenna is not provided, binary information based on the region where the resonance peak is detected and the region where the resonance peak is not detected It is possible to express identification information consisting of a combination of
本発明の識別体の基本形態の一例の表面の構成を示す図である。It is a figure which shows the structure of the surface of an example of the basic form of the identification body of this invention. 図１ａに示したＡ－Ａ’断面図である。FIG. 1B is a cross-sectional view taken along the line A-A ′ shown in FIG. 本発明の識別体の基本形態の一例の裏面の構成を示す図である。It is a figure which shows the structure of the back surface of an example of the basic form of the identification body of this invention. １枚のベース基材の一方の面のみにアンテナが形成されてなるＩＤタグが誘電体に接していない状態の周波数特性を示す図である。It is a figure which shows the frequency characteristic of the state in which the ID tag by which an antenna is formed only in one surface of one base base material is not in contact with a dielectric material. １枚のベース基材の一方の面のみにアンテナが形成されてなるＩＤタグが誘電体に接している状態の周波数特性を示す図である。It is a figure which shows the frequency characteristic of the state in which the ID tag by which an antenna is formed only in one side of one base base material is in contact with the dielectric. １枚のベース基材の一方の面のみにアンテナが形成され、他方の面の全面にグランドパターンが形成されてなるＩＤタグにおいてアンテナが形成された面側からＩＤの読み取りを行った場合の周波数特性を示す図である。Frequency when an ID is read from the surface where an antenna is formed in an ID tag in which an antenna is formed on only one surface of one base substrate and a ground pattern is formed on the entire other surface. It is a figure which shows a characteristic. １枚のベース基材の一方の面のみにアンテナが形成され、他方の面の全面にグランドパターンが形成されてなるＩＤタグにおいてグランドパターンが形成された面側からＩＤの読み取りを行った場合の周波数特性を示す図である。In an ID tag in which an antenna is formed only on one surface of one base substrate and a ground pattern is formed on the entire other surface, ID is read from the surface side where the ground pattern is formed. It is a figure which shows a frequency characteristic. 図１ａ～図１ｃに示したＩＤタグが誘電体に接していない状態の周波数特性を示す図である。FIG. 2 is a diagram showing frequency characteristics when the ID tag shown in FIGS. 1a to 1c is not in contact with a dielectric. 図１ａ～図１ｃに示したＩＤタグの一方の面側からＩＤの読み取りを行った場合の周波数特性を示す図である。FIG. 2 is a diagram showing frequency characteristics when an ID is read from one side of the ID tag shown in FIGS. 1a to 1c. グランドパターンと対向した場合に共振ピークが発現しなくなるアンテナの特性を示す図である。It is a figure which shows the characteristic of the antenna from which a resonance peak does not express when it opposes a ground pattern. グランドパターンと対向することで共振ピークが発現するアンテナの特性を示す図である。It is a figure which shows the characteristic of the antenna which a resonance peak expresses by facing a ground pattern. 図１ａ～図１ｃに示したＩＤタグの応用例の表面の構成を示す図である。FIG. 2 is a diagram showing a surface configuration of an application example of the ID tag shown in FIGS. 1a to 1c. 図６ａに示したＡ－Ａ’断面図である。FIG. 6B is a cross-sectional view taken along the line A-A ′ shown in FIG. 6A. 図１ａ～図１ｃに示したＩＤタグの応用例の裏面の構成を示す図である。FIG. 2 is a diagram showing a configuration of a back surface of an application example of the ID tag shown in FIGS. 1a to 1c. 図６ａ～図６ｃに示したＩＤタグに付与されたＩＤを認識するＩＤ認識システムの一例を示す図である。FIG. 6 is a diagram showing an example of an ID recognition system that recognizes an ID assigned to an ID tag shown in FIGS. 6a to 6c. 本発明の識別体の基本形態の他の例の表面の構成を示す図である。It is a figure which shows the structure of the surface of the other example of the basic form of the identification body of this invention. 図８ａに示したＡ－Ａ’断面図である。FIG. 8B is a cross-sectional view taken along the line A-A ′ shown in FIG. 8a. 本発明の識別体の基本形態の他の例の裏面の構成を示す図である。It is a figure which shows the structure of the back surface of the other example of the basic form of the identification body of this invention. 図８ａ～図８ｃに示したＩＤタグの周波数特性を説明するための図である。FIG. 9 is a diagram for explaining frequency characteristics of the ID tag shown in FIGS. 8a to 8c. 図１ａ～図１ｃに示したＩＤタグの実用例を示す表面図である。FIG. 2 is a surface view showing a practical example of the ID tag shown in FIGS. 1a to 1c. 図１０ａに示したＡ－Ａ’断面図である。FIG. 10b is a cross-sectional view taken along the line A-A 'shown in FIG. 10a. 図１ａ～図１ｃに示したＩＤタグの変形実用例を示す表面図である。FIG. 2 is a surface view showing a modified practical example of the ID tag shown in FIGS. 1a to 1c. 図１１ａに示したＡ－Ａ’断面図である。FIG. 11B is a cross-sectional view taken along the line A-A ′ shown in FIG. 11 a.
　以下に、本発明の実施の形態について図面を参照して説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
　図１ａは、本発明の識別体の基本形態の一例の表面の構成を示す図である。図１ｂは、図１ａに示したＡ－Ａ’断面図である。図１ｃは、本発明の識別体の基本形態の一例の裏面の構成を示す図である。 FIG. 1a is a diagram showing a surface configuration of an example of a basic form of an identifier of the present invention. FIG. 1B is a cross-sectional view taken along line A-A ′ shown in FIG. FIG. 1c is a diagram showing the configuration of the back surface of an example of the basic form of the identifier of the present invention.
　本形態における識別体は図１ａ～図１ｃに示すように、アンテナ領域３１が設けられたベース基材１０ａと、アンテナ領域３２が設けられたベース基材１０ｂとが、グランドパターン４０を介して積層されて構成されたＩＤタグ１である。 As shown in FIGS. 1a to 1c, the identification body in this embodiment is formed by laminating a base substrate 10a provided with an antenna region 31 and a base substrate 10b provided with an antenna region 32 via a ground pattern 40. This is an ID tag 1 configured as described above.
　ベース基材１０ａ，１０ｂはそれぞれ、本願発明における絶縁層となるものであって、互いに同一形状を有し、２００～３００μｍ程度の厚みを有する絶縁性材料からなる。絶縁性材料としては、樹脂フィルム等が考えられるが、誘電正接が小さなものが好ましい。なお、絶縁層として、ベース基材１０ａ，１０ｂを用いずに、絶縁性樹脂膜を塗布することで構成したものであってもよい。アンテナ領域３１，３２はそれぞれ、ベース基材１０ａ，１０ｂのグランドパターン４０との積層面とは反対側の面に設けられており、導電性材料からなるアンテナ２１，２２が形成されている。これにより、ベース基材１０ａ，１０ｂを介してグランドパターン４０の表裏のそれぞれにアンテナ２１，２２が対向して設けられた構成となっている。これらアンテナ２１，２２は、長方形の外形を有し、その短辺の１つからスリットが長手方向に入った形状となっており、互いに同一の形状を有して同一の向きでアンテナ領域３１，３２に形成されている。そして、アンテナ２１，２２は、グランドパターン４０と対向することで、アンテナ２１，２２の形状に応じた周波数にて共振ピークを発現する。 Each of the base substrates 10a and 10b serves as an insulating layer in the present invention, and is made of an insulating material having the same shape and a thickness of about 200 to 300 μm. A resin film or the like can be considered as the insulating material, but a material having a small dielectric loss tangent is preferable. The insulating layer may be configured by applying an insulating resin film without using the base substrates 10a and 10b. The antenna regions 31 and 32 are provided on the surface opposite to the surface of the base base material 10a or 10b on which the ground pattern 40 is laminated, and the antennas 21 and 22 made of a conductive material are formed. Thus, the antennas 21 and 22 are provided so as to face each other on the front and back of the ground pattern 40 via the base substrates 10a and 10b. Each of the antennas 21 and 22 has a rectangular outer shape, and has a shape in which a slit enters the longitudinal direction from one of its short sides. The antenna regions 31 and 22 have the same shape and the same direction. 32. Then, the antennas 21 and 22 are opposed to the ground pattern 40, thereby expressing a resonance peak at a frequency corresponding to the shape of the antennas 21 and 22.
　グランドパターン４０は、本願発明における導電層となるものであって、ベース基材１０ａ，１０ｂ間にて、ベース基材１０ａとベース基材１０ｂとの積層面のうち少なくとも一方の全面に形成されており、それにより、平面視にてアンテナ２１，２２を覆う形状を有している。 The ground pattern 40 serves as a conductive layer in the present invention, and is formed on the entire surface of at least one of the laminated surfaces of the base substrate 10a and the base substrate 10b between the base substrates 10a and 10b. Thus, the antennas 21 and 22 are covered in a plan view.
　上記のように構成されたＩＤタグ１においては、アンテナ２１，２２が、グランドパターン４０と対向することでアンテナ２１，２２の形状に応じた周波数にて共振ピークを発現するため、電磁波を照射し、その反射波において、アンテナ２１，２２の形状に応じた周波数の近傍にて共振ピークが検出されるかどうかによって、ＩＤタグ１に付与されたＩＤを認識することができる。具体的には、アンテナ領域３１，３２にそれぞれアンテナ２１，２２が形成されていれば共振ピークが検出されるため、その際のＩＤを“１”とし、また、アンテナ領域３１，３２のいずれにもアンテナ２１，２２が形成されていなければ共振ピークが検出されないため、その際のＩＤを“０”とすることで、ＩＤを認識することができる。なお、アンテナ２１，２２が、グランドパターン４０と対向することで共振ピークを発現することについての詳細な説明は後述する。 In the ID tag 1 configured as described above, the antennas 21 and 22 are opposed to the ground pattern 40 so that a resonance peak appears at a frequency corresponding to the shape of the antennas 21 and 22. In the reflected wave, the ID assigned to the ID tag 1 can be recognized depending on whether a resonance peak is detected in the vicinity of the frequency corresponding to the shape of the antennas 21 and 22. Specifically, if the antennas 21 and 22 are formed in the antenna areas 31 and 32, respectively, a resonance peak is detected. Therefore, the ID at that time is set to “1”, and any of the antenna areas 31 and 32 is set. Since the resonance peak is not detected if the antennas 21 and 22 are not formed, the ID can be recognized by setting the ID at that time to “0”. A detailed description of the fact that the antennas 21 and 22 exhibit a resonance peak by facing the ground pattern 40 will be described later.
　ここで、アンテナ２１，２２が、ベース基材１０ａ，１０ｂを介してグランドパターン４０の表裏のそれぞれに対向して設けられた構成となっていることによる作用について説明する。 Here, the operation of the antennas 21 and 22 that are provided so as to be opposed to the front and back of the ground pattern 40 via the base substrates 10a and 10b will be described.
　まず、１枚のベース基材の一方の面のみに図１ａ～図１ｃに示したものと同じようなアンテナが形成されてなるＩＤタグの周波数特性について説明する。 First, the frequency characteristics of an ID tag in which an antenna similar to that shown in FIGS. 1a to 1c is formed on only one surface of one base substrate will be described.
　図２ａは、１枚のベース基材の一方の面のみにアンテナが形成されてなるＩＤタグが誘電体に接していない状態の周波数特性を示す図である。図２ｂは、１枚のベース基材の一方の面のみにアンテナが形成されてなるＩＤタグが誘電体に接している状態の周波数特性を示す図である。 FIG. 2a is a diagram showing frequency characteristics in a state where an ID tag in which an antenna is formed only on one surface of one base substrate is not in contact with a dielectric. FIG. 2B is a diagram illustrating frequency characteristics in a state where an ID tag in which an antenna is formed on only one surface of one base substrate is in contact with a dielectric.
　１枚のベース基材の一方の面のみにアンテナが形成されてなるＩＤタグにおいては、誘電体に接触していない状態においてアンテナが形成された面側から電磁波を照射してその反射波を受信した場合に、反射波の周波数特性が図２ａの実線で示すようなものであるとすると、アンテナが形成された面とは反対側から電磁波を照射してその反射波を受信した場合であっても、反射波の周波数特性は図２ａの破線で示すようなものとなり、周波数特性はほとんど変わらず、ＩＤタグのいずれの面からも、アンテナの共振ピークによるＩＤを正しく認識することができる。 In an ID tag in which an antenna is formed only on one surface of a single base substrate, an electromagnetic wave is irradiated from the surface side where the antenna is formed in a state where it is not in contact with a dielectric, and the reflected wave is received. If the frequency characteristic of the reflected wave is as shown by the solid line in FIG. 2a, the reflected wave is received by irradiating the electromagnetic wave from the side opposite to the surface where the antenna is formed. However, the frequency characteristic of the reflected wave is as shown by the broken line in FIG. 2a, and the frequency characteristic hardly changes, and the ID due to the resonance peak of the antenna can be correctly recognized from any surface of the ID tag.
　ところが、１枚のベース基材の一方の面のみにアンテナが形成されてなるＩＤタグにおいて、誘電体に接触していない状態における反射波の周波数特性が図２ｂの実線で示すようなものであっても、人の手等の誘電体に接触した状態で電磁波を照射してその反射波を受信すると、反射波の周波数特性が図２ｂの破線で示すようなものとなり、周波数特性が周囲環境の影響を受けて大きく変化し、アンテナの共振ピークによるＩＤを正しく認識することができなくなってしまう。 However, in an ID tag in which an antenna is formed on only one surface of a single base substrate, the frequency characteristics of the reflected wave when not in contact with the dielectric are as shown by the solid line in FIG. 2b. However, when an electromagnetic wave is irradiated in contact with a dielectric such as a human hand and the reflected wave is received, the frequency characteristic of the reflected wave becomes as shown by the broken line in FIG. It will change greatly under the influence, and the ID due to the resonance peak of the antenna cannot be recognized correctly.
　次に、１枚のベース基材の一方の面のみに図１ａ～図１ｃに示したものと同じようなアンテナが形成され、他方の面の全面に図１ａ～図１ｃに示したものと同様にグランドパターンが形成されてなるＩＤタグの周波数特性について説明する。 Next, an antenna similar to that shown in FIGS. 1a to 1c is formed on only one surface of one base substrate, and the same as that shown in FIGS. 1a to 1c is formed on the entire other surface. Next, frequency characteristics of an ID tag formed with a ground pattern will be described.
　図３ａは、１枚のベース基材の一方の面のみにアンテナが形成され、他方の面の全面にグランドパターンが形成されてなるＩＤタグにおいてアンテナが形成された面側からＩＤの読み取りを行った場合の周波数特性を示す図である。図３ｂは、１枚のベース基材の一方の面のみにアンテナが形成され、他方の面の全面にグランドパターンが形成されてなるＩＤタグにおいてグランドパターンが形成された面側からＩＤの読み取りを行った場合の周波数特性を示す図である。 FIG. 3a shows an ID tag in which an antenna is formed only on one surface of one base substrate and a ground pattern is formed on the other surface, and ID is read from the surface where the antenna is formed. It is a figure which shows the frequency characteristic in the case of. FIG. 3b shows an ID tag in which an antenna is formed only on one surface of a single base substrate and a ground pattern is formed on the entire other surface, and ID reading is performed from the surface side where the ground pattern is formed. It is a figure which shows the frequency characteristic at the time of performing.
　１枚のベース基材の一方の面のみにアンテナが形成され、他方の面の全面にグランドパターンが形成されてなるＩＤタグにおいては、誘電体に接触していない状態においてアンテナが形成された面側から電磁波を照射してその反射波を受信した場合に、反射波の周波数特性が図３ａの実線で示すようなものであるとすると、人の手等の誘電体に接触した状態にてアンテナが形成された面側から電磁波を照射してその反射波を受信した場合であっても、反射波の周波数特性は図３ａの破線で示すようなものとなり、周波数特性はほとんど変わらず、誘電体に接触しているかどうかによらずに、アンテナの共振ピークによるＩＤを正しく認識することができる。 In an ID tag in which an antenna is formed only on one surface of one base substrate and a ground pattern is formed on the entire other surface, the surface on which the antenna is formed without being in contact with a dielectric. When the electromagnetic wave is irradiated from the side and the reflected wave is received, and the frequency characteristic of the reflected wave is as shown by the solid line in FIG. 3a, the antenna is in contact with a dielectric such as a human hand. Even when the electromagnetic wave is irradiated from the surface side where the wave is formed and the reflected wave is received, the frequency characteristic of the reflected wave is as shown by the broken line in FIG. It is possible to correctly recognize the ID due to the resonance peak of the antenna regardless of whether it is in contact with the antenna.
　ところが、１枚のベース基材の一方の面のみにアンテナが形成され、他方の面の全面にグランドパターンが形成されてなるＩＤタグにおいて、アンテナが形成された面側から電磁波を照射してその反射波を受信した場合に、反射波の周波数特性が図３ｂの実線で示すようなものであっても、グランドパターンが形成された面側から電磁波を照射してその反射波を受信すると、電磁波がグランドパターンによって遮断され、反射波の周波数特性が図３ｂの破線で示すようなものとなり、周波数特性にて共振ピークが存在しなくなり、アンテナの共振ピークによるＩＤを認識することができなくなってしまう。 However, in an ID tag in which an antenna is formed only on one surface of a single base substrate and a ground pattern is formed on the entire surface of the other surface, electromagnetic waves are irradiated from the surface on which the antenna is formed. When the reflected wave is received, even if the frequency characteristic of the reflected wave is as indicated by the solid line in FIG. 3b, if the reflected wave is received by irradiating the electromagnetic wave from the surface side on which the ground pattern is formed, Is cut off by the ground pattern, and the frequency characteristic of the reflected wave becomes as shown by the broken line in FIG. 3b, and the resonance peak does not exist in the frequency characteristic, and the ID due to the resonance peak of the antenna cannot be recognized. .
　次に、図１ａ～図１ｃに示したＩＤタグ１の周波数特性について説明する。 Next, the frequency characteristics of the ID tag 1 shown in FIGS. 1a to 1c will be described.
　図４ａは、図１ａ～図１ｃに示したＩＤタグ１が誘電体に接していない状態の周波数特性を示す図である。図４ｂは、図１ａ～図１ｃに示したＩＤタグ１の一方の面側からＩＤの読み取りを行った場合の周波数特性を示す図である。 FIG. 4a is a diagram showing frequency characteristics in a state where the ID tag 1 shown in FIGS. 1a to 1c is not in contact with a dielectric. FIG. 4b is a diagram showing frequency characteristics when the ID is read from one side of the ID tag 1 shown in FIGS. 1a to 1c.
　図１ａ～図１ｃに示したＩＤタグ１においては、誘電体に接触していない状態においてアンテナ２１が形成された面側から電磁波を照射してその反射波を受信した場合、反射波の周波数特性が図４ａの実線で示すようなものとなり、図中点線で囲んだ領域に共振ピークを有するものとなる。 In the ID tag 1 shown in FIGS. 1a to 1c, when the electromagnetic wave is irradiated from the surface side on which the antenna 21 is formed and the reflected wave is received without being in contact with the dielectric, the frequency characteristic of the reflected wave is obtained. Is as shown by a solid line in FIG. 4a, and has a resonance peak in a region surrounded by a dotted line in the figure.
　一方、図１ａ～図１ｃに示したＩＤタグ１において、誘電体に接触していない状態にてアンテナ２２が形成された面側から電磁波を照射してその反射波を受信した場合、反射波の周波数特性が図４ａの破線で示すようなものとなり、周波数特性はほとんど変わらず、同様に図中点線で囲んだ領域に共振ピークを有するものとなる。 On the other hand, in the ID tag 1 shown in FIGS. 1a to 1c, when the reflected wave is received by irradiating the electromagnetic wave from the surface side on which the antenna 22 is formed without being in contact with the dielectric, The frequency characteristic is as shown by a broken line in FIG. 4a, and the frequency characteristic is hardly changed, and similarly has a resonance peak in a region surrounded by a dotted line in the figure.
　このように、図１ａ～図１ｃに示したＩＤタグ１においては、誘電体に接触していない状態にてアンテナ２１が形成された面側から電磁波を照射してその反射波を受信した場合も、アンテナ２２が形成された面側から電磁波を照射してその反射波を受信した場合も、その周波数特性はほとんど変化せず、同じ周波数にて共振ピークが現れることになる。これは、上述したように、アンテナ２１，２２が互いに同一の形状を有して同一の向きでベース基材１０ａ，１０ｂにそれぞれ形成されており、かつ、一方の面から電磁波を照射した場合、グランドパターン４０によってその電磁波が遮断され、他方の面のアンテナの影響を受けずに反射波が受信されるためである。 As described above, in the ID tag 1 shown in FIGS. 1a to 1c, the reflected wave may be received by irradiating the electromagnetic wave from the surface side on which the antenna 21 is formed without being in contact with the dielectric. When the electromagnetic wave is irradiated from the surface side on which the antenna 22 is formed and the reflected wave is received, the frequency characteristics hardly change, and a resonance peak appears at the same frequency. As described above, when the antennas 21 and 22 have the same shape and are formed on the base substrates 10a and 10b in the same direction, respectively, and when electromagnetic waves are irradiated from one surface, This is because the electromagnetic wave is blocked by the ground pattern 40 and the reflected wave is received without being influenced by the antenna on the other surface.
　また、図１ａ～図１ｃに示したＩＤタグ１において、誘電体に接触していない状態においてアンテナ２１が形成された面側から電磁波を照射してその反射波を受信した場合に、反射波の周波数特性が図４ｂの実線で示すようなものとなる場合において、人の手等の誘電体に接触した状態にてアンテナ２１が形成された面側から電磁波を照射してその反射波を受信した場合であっても、反射波の周波数特性は図４ｂの破線で示すようなものとなり、周波数特性はほとんど変わらず、図中点線で囲んだ領域に共振ピークを有するものとなり、誘電体に接触しているかどうかによらずに、アンテナの共振ピークによるＩＤを認識することができる。これは、アンテナ２２が形成された面側から電磁波を照射してその反射波を受信した場合でも同様である。 Further, in the ID tag 1 shown in FIGS. 1a to 1c, when the reflected wave is received by irradiating the electromagnetic wave from the surface side where the antenna 21 is formed in a state where the antenna is not in contact with the dielectric, When the frequency characteristic is as shown by the solid line in FIG. 4b, the reflected wave was received by irradiating the electromagnetic wave from the surface side on which the antenna 21 was formed in contact with a dielectric such as a human hand. Even in this case, the frequency characteristic of the reflected wave is as shown by the broken line in FIG. 4b, and the frequency characteristic is hardly changed, and has a resonance peak in the region surrounded by the dotted line in the figure, and is in contact with the dielectric. It is possible to recognize the ID due to the resonance peak of the antenna regardless of whether or not it is present. This is the same even when an electromagnetic wave is irradiated from the surface side where the antenna 22 is formed and the reflected wave is received.
　このように、図１ａ～図１ｃに示したＩＤタグ１においては、誘電体に接触していない状態にて電磁波を照射してその反射波を受信した場合も、誘電体に接触した状態で電磁波を照射してその反射波を受信した場合も、その周波数特性はほとんど変化せず、同じ周波数にて共振ピークが現れることになる。これは、上述したように、アンテナ２１，２２が、グランドパターン４０と対向することで、アンテナ２１，２２の形状に応じた周波数にて共振ピークを発現するものであり、また、誘電体に接触した場合においても、誘電体の影響がグランドパターン４０によって遮断されるためである。 As described above, in the ID tag 1 shown in FIGS. 1a to 1c, even when the electromagnetic wave is irradiated without being in contact with the dielectric and the reflected wave is received, the electromagnetic wave is still in contact with the dielectric. When the reflected wave is received after irradiation, the frequency characteristics hardly change and a resonance peak appears at the same frequency. As described above, when the antennas 21 and 22 face the ground pattern 40, a resonance peak appears at a frequency corresponding to the shape of the antennas 21 and 22, and the dielectric 21 is in contact with the dielectric. This is because the influence of the dielectric is blocked by the ground pattern 40 even in this case.
　上述したしたように、図１ａ～図１ｃに示したＩＤタグ１においては、アンテナ２１，２２が、ベース基材１０ａ，１０ｂを介してグランドパターン４０の表裏のそれぞれに対向して設けられた構成となっていることにより、アンテナ２１が形成された面側から電磁波を照射してその反射波を受信した場合も、アンテナ２２が形成された面側から電磁波を照射してその反射波を受信した場合も、その周波数特性はほとんど変化せず、同じ周波数にて共振ピークが現れることになり、また、誘電体に接触していない状態にて電磁波を照射してその反射波を受信した場合も、誘電体に接触した状態で電磁波を照射してその反射波を受信した場合も、その周波数特性はほとんど変化せず、同じ周波数にて共振ピークが現れることになり、いずれの場合でも、アンテナ２１，２２の共振ピークが正しく検出され、この共振ピークによる識別情報を、ＩＤタグ１が誘電体に接触した状態で使用される場合であっても利便性を低下させることなく正しく認識することができる。 As described above, in the ID tag 1 shown in FIGS. 1a to 1c, the antennas 21 and 22 are provided to face the front and back of the ground pattern 40 via the base materials 10a and 10b, respectively. Therefore, even when an electromagnetic wave is irradiated from the surface side on which the antenna 21 is formed and the reflected wave is received, the reflected wave is received by irradiating the electromagnetic wave from the surface side on which the antenna 22 is formed. In this case, the frequency characteristics hardly change, and a resonance peak appears at the same frequency, and when the reflected wave is received by irradiating an electromagnetic wave without being in contact with the dielectric, When the reflected wave is received by irradiating an electromagnetic wave in contact with the dielectric, the frequency characteristics hardly change and a resonance peak appears at the same frequency. Even if the resonance peaks of the antennas 21 and 22 are detected correctly, and the identification information based on the resonance peaks is correctly used even when the ID tag 1 is used in contact with the dielectric, the convenience is not lowered. Can be recognized.
　ここで、アンテナ２１，２２が、グランドパターン４０と対向することで共振ピークを発現することについて説明する。 Here, it will be described that the antennas 21 and 22 exhibit a resonance peak by facing the ground pattern 40.
　図５ａは、グランドパターンと対向した場合に共振ピークが発現しなくなるアンテナの特性を示す図である。図５ｂは、グランドパターンと対向することで共振ピークが発現するアンテナの特性を示す図である。 FIG. 5a is a diagram showing characteristics of an antenna in which a resonance peak does not appear when facing a ground pattern. FIG. 5B is a diagram illustrating the characteristics of an antenna in which a resonance peak appears by facing the ground pattern.
　図５ａの実線で示すように、Ｑ値が３０を超える鋭い共振ピークを有するアンテナにおいては、図１ａ～図１ｃに示したようにグランドパターンと対向した場合、図５ａの破線で示すように共振ピークが発現しなくなる。 As shown by the solid line in FIG. 5a, in an antenna having a sharp resonance peak with a Q value exceeding 30, when opposed to the ground pattern as shown in FIGS. 1a to 1c, resonance occurs as shown by the broken line in FIG. 5a. The peak disappears.
　一方、図５ｂの実線で示すように、Ｑ値が２０である緩やかな共振ピークを有するアンテナにおいては、図１ａ～図１ｃに示したようにグランドパターンと対向した場合、図５ｂの破線で示すように、異なる周波数にて、Ｑ値が３０以上となる鋭い共振ピークが発現するようになる。このように、グランドパターンに対向した場合に共振ピークが発現するためには、Ｑ値が３０以下、好ましくは２０以下であるか、あるいは、アンテナ単体では共振ピークが発現しないものである必要がある。 On the other hand, as shown by the solid line in FIG. 5b, in the antenna having a gentle resonance peak having a Q value of 20, when facing the ground pattern as shown in FIGS. 1a to 1c, it is shown by the broken line in FIG. Thus, a sharp resonance peak with a Q value of 30 or more appears at different frequencies. Thus, in order for the resonance peak to appear when facing the ground pattern, it is necessary that the Q value is 30 or less, preferably 20 or less, or that the antenna alone does not exhibit the resonance peak. .
　なお、Ｑ値とは、共振ピークでの周波数をω0とし、その共振ピークよりも低周波側にて振動エネルギーが共振ピークの半値となる周波数をω1とし、共振ピークよりも高周波側にて振動エネルギーが共振ピークの半値となる周波数をω2とした場合、Ｑ＝ω0／（ω2－ω1）で表される値である。 The Q value is the frequency at the resonance peak at ω 0 , the frequency at which the vibration energy is half the resonance peak at the lower frequency side than the resonance peak is ω 1, and at the higher frequency side from the resonance peak. When the frequency at which the vibration energy is half the resonance peak is ω 2 , this is a value represented by Q = ω 0 / (ω 2 −ω 1 ).
　そのため、図１ａ～図１ｃに示したアンテナ２１，２２においても、アンテナ２１，２２単体、すなわち、グランドパターン４０に対向しない状態におけるＱ値が３０以下であることにより、グランドパターン４０と対向することで、Ｑ値が３０以上の鋭い共振ピークが発現することになる。 Therefore, even in the antennas 21 and 22 shown in FIGS. 1a to 1c, the antennas 21 and 22 alone, that is, the Q value in a state where the antennas 21 and 22 do not face the ground pattern 40 are 30 or less, face the ground pattern 40. Thus, a sharp resonance peak having a Q value of 30 or more appears.
　以下に、上述した作用を利用して実際にＩＤを生成し、そのＩＤを認識する応用例について説明する。 Hereinafter, an application example in which an ID is actually generated using the above-described action and the ID is recognized will be described.
　図６ａは、図１ａ～図１ｃに示したＩＤタグ１の応用例の表面の構成を示す図である。図６ｂは、図６ａに示したＡ－Ａ’断面図である。図６ｃは、図１ａ～図１ｃに示したＩＤタグ１の応用例の裏面の構成を示す図である。 FIG. 6a is a diagram showing a surface configuration of an application example of the ID tag 1 shown in FIGS. 1a to 1c. 6b is a cross-sectional view taken along the line A-A 'shown in FIG. 6a. FIG. 6c is a diagram showing the configuration of the back surface of the application example of the ID tag 1 shown in FIGS. 1a to 1c.
　本応用例は図６ａ～図６ｃに示すように、５つのアンテナ領域１３１ａ～１３１ｅが設けられたベース基材１１０ａと、５つのアンテナ領域１３２ａ～１３２ｅが設けられたベース基材１１０ｂとが、グランドパターン１４０を介して積層されて構成されたＩＤタグ１０１である。 In this application example, as shown in FIGS. 6a to 6c, a base substrate 110a provided with five antenna regions 131a to 131e and a base substrate 110b provided with five antenna regions 132a to 132e are grounded. The ID tag 101 is configured by being stacked via a pattern 140.
　ベース基材１１０ａ，１１０ｂはそれぞれ、例えば、図１ａ～図１ｃに示したベース基材１０ａ，１０ｂと同様のものから構成されている。アンテナ領域１３１ａ～１３１ｅとアンテナ領域１３２ａ～１３２ｅとはそれぞれ、ベース基材１１０ａ，１１０ｂのグランドパターン１４０との積層面とは反対側の面に、互いに対向するように設けられている。 Each of the base substrates 110a and 110b is composed of the same material as the base substrates 10a and 10b shown in FIGS. 1a to 1c, for example. The antenna regions 131a to 131e and the antenna regions 132a to 132e are provided on the surfaces of the base substrates 110a and 110b opposite to the laminated surface with the ground pattern 140 so as to face each other.
　アンテナ領域１３１ａ～１３１ｅ，１３２ａ～１３２ｅは、互いに異なる周波数が割り当てられている。本形態においては、アンテナ領域１３１ａ，１３２ａには、７．０ＧＨｚの周波数が割り当てられており、アンテナ領域１３１ｂ，１３２ｂには、８．０ＧＨｚの周波数が割り当てられており、アンテナ領域１３１ｃ，１３２ｃには、９．０ＧＨｚの周波数が割り当てられており、アンテナ領域１３１ｄ，１３２ｄには、１０．０ＧＨｚの周波数が割り当てられており、アンテナ領域１３１ｅ，１３２ｅには、１１．０ＧＨｚの周波数が割り当てられている。 The antenna areas 131a to 131e and 132a to 132e are assigned different frequencies. In this embodiment, a frequency of 7.0 GHz is assigned to the antenna areas 131a and 132a, a frequency of 8.0 GHz is assigned to the antenna areas 131b and 132b, and the antenna areas 131c and 132c are assigned to the antenna areas 131c and 132c. A frequency of 9.0 GHz is assigned, a frequency of 10.0 GHz is assigned to the antenna regions 131d and 132d, and a frequency of 11.0 GHz is assigned to the antenna regions 131e and 132e.
　グランドパターン１４０は、ベース基材１１０ａ，１１０ｂ間にて、ベース基材１１０ａとベース基材１１０ｂとの積層面のうち少なくとも一方の全面に形成されている。 The ground pattern 140 is formed on the entire surface of at least one of the laminated surfaces of the base substrate 110a and the base substrate 110b between the base substrates 110a and 110b.
　アンテナ領域１３１ａ，１３２ａには、グランドパターン１４０と対向することで、アンテナ領域１３１ａ，１３２ａに割り当てられた７．０ＧＨｚ近傍にて共振ピークが発現するアンテナ１２１ａ，１２２ａがそれぞれ形成されている。アンテナ領域１３１ｂ，１３２ｂには、グランドパターン１４０と対向することで、アンテナ領域１３１ｂ，１３２ｂに割り当てられた８．０ＧＨｚ近傍にて共振ピークが発現するアンテナ１２１ｂ，１２２ｂがそれぞれ形成されている。アンテナ領域１３１ｃ，１３２ｃには、グランドパターン１４０と対向することで、アンテナ領域１３１ｃ，１３２ｃに割り当てられた９．０ＧＨｚ近傍にて共振ピークが発現するアンテナ１２１ｃ，１２２ｃがそれぞれ形成されている。アンテナ領域１３１ｄ，１３２ｄには、アンテナが形成されていない。アンテナ領域１３１ｅ，１３２ｅには、グランドパターン１４０と対向することで、アンテナ領域１３１ｅ，１３２ｅに割り当てられた１１．０ＧＨｚ近傍にて共振ピークが発現するアンテナ１２１ｅ，１２２ｅがそれぞれ形成されている。これらアンテナ領域１３１ａ～１３１ｅ，１３２ａ～１３２ｅに形成されるアンテナは、図１ａ～図１ｃに示したものと同様に、長方形の外形を有し、その短辺の１つからスリットが長手方向に入った形状となっているが、その長手方向の長さが異なることにより、グランドパターンと対向することで互いに異なる周波数にて共振ピークが発現するものとなっている。また、アンテナ領域１３１ａ～１３１ｅ，１３２ａ～１３２ｅのうち、アンテナ領域１３１ａ，１３１ｂ，１３１ｄ，１３１ｅ，１３２ａ，１３２ｂ，１３２ｄ，１３２ｅに形成されるアンテナは、その長手方向が互いに同一方向となるのに対して、アンテナ領域１３１ｃ，１３２ｃに形成されるアンテナは、その長手方向がこれらに対して直交しており、基準アンテナとなるものである。このように、アンテナ領域１３１ａ，１３１ｂ，１３１ｄ，１３１ｅ，１３２ａ，１３２ｂ，１３２ｄ，１３２ｅに形成されるアンテナとアンテナ領域１３１ｃ，１３２ｃに形成されるアンテナとは、長手方向が直交することにより、偏波方向が互いに異なっている。 The antenna areas 131a and 132a are formed with antennas 121a and 122a, respectively, which are opposed to the ground pattern 140 and exhibit resonance peaks in the vicinity of 7.0 GHz assigned to the antenna areas 131a and 132a. The antenna regions 131b and 132b are formed with antennas 121b and 122b, respectively, which are opposed to the ground pattern 140 and exhibit resonance peaks in the vicinity of 8.0 GHz allocated to the antenna regions 131b and 132b. The antenna regions 131c and 132c are formed with antennas 121c and 122c, respectively, which are opposed to the ground pattern 140 and exhibit a resonance peak in the vicinity of 9.0 GHz allocated to the antenna regions 131c and 132c. Antennas are not formed in the antenna regions 131d and 132d. The antenna regions 131e and 132e are formed with antennas 121e and 122e, respectively, which are opposed to the ground pattern 140 and exhibit a resonance peak in the vicinity of 11.0 GHz assigned to the antenna regions 131e and 132e. The antennas formed in these antenna regions 131a to 131e and 132a to 132e have a rectangular outer shape similar to that shown in FIGS. 1a to 1c, and a slit enters the longitudinal direction from one of the short sides. However, since the lengths in the longitudinal direction are different, resonance peaks appear at different frequencies by facing the ground pattern. Among the antenna regions 131a to 131e and 132a to 132e, the antennas formed in the antenna regions 131a, 131b, 131d, 131e, 132a, 132b, 132d, and 132e have the same longitudinal direction. Thus, the antennas formed in the antenna regions 131c and 132c have a longitudinal direction orthogonal to them and serve as a reference antenna. Thus, the antennas formed in the antenna regions 131a, 131b, 131d, 131e, 132a, 132b, 132d, and 132e and the antennas formed in the antenna regions 131c and 132c are polarized by having their longitudinal directions orthogonal to each other. The directions are different from each other.
　図７は、図６ａ～図６ｃに示したＩＤタグ１０１に付与されたＩＤを認識するＩＤ認識システムの一例を示す図である。 FIG. 7 is a diagram showing an example of an ID recognition system that recognizes the ID assigned to the ID tag 101 shown in FIGS. 6a to 6c.
　本例におけるＩＤ認識システムは図７に示すように、図６ａ～図６ｃに示したＩＤタグ１０１と、ＩＤタグ１０１に付与されたＩＤを認識するリーダ５０とから構成され、リーダ５０は、送信アンテナ５１ａと、受信アンテナ５１ｂと、送信部５２と、受信部５３と、処理部５４と、制御部５５とを有する。 As shown in FIG. 7, the ID recognition system in this example includes the ID tag 101 shown in FIGS. 6a to 6c and a reader 50 that recognizes the ID assigned to the ID tag 101. The reader 50 transmits The antenna 51a, the reception antenna 51b, the transmission unit 52, the reception unit 53, the processing unit 54, and the control unit 55 are included.
　送信部５２は、アンテナ領域１３１ａ～１３１ｅ，１３２ａ～１３２ｅに割り当てられた周波数を含む電磁波を生成し、送信アンテナ５１ａを介して照射する。 The transmission unit 52 generates electromagnetic waves including frequencies assigned to the antenna regions 131a to 131e and 132a to 132e, and irradiates them through the transmission antenna 51a.
　受信部５３は、送信部５２から送信アンテナ５１ａを介して照射された電磁波に対するＩＤタグ１０１からの反射波を受信アンテナ５１ｂを介して受信し、反射波の受信電力のレベルを検知する。 The receiving unit 53 receives the reflected wave from the ID tag 101 with respect to the electromagnetic wave irradiated from the transmitting unit 52 via the transmitting antenna 51a via the receiving antenna 51b, and detects the level of the received power of the reflected wave.
　処理部５４は、受信部５３にて検知された受信電力のレベルによって、ＩＤタグ１０１における共振ピークを検出し、アンテナ領域１３１ａ～１３１ｅ，１３２ａ～１３２ｅに割り当てられた周波数のうち、共振ピークが検出された周波数についての個別ＩＤを“１”とし、共振ピークが検出されなかった周波数についての個別ＩＤを“０”とし、これら“１”と“０”とを周波数の順序に並べることで、ＩＤタグ１０１に付与されたＩＤを認識する。この際、アンテナ領域１３１ｃ，１３２ｃに形成されたアンテナ１２１ｃ，１２２ｃが、上述したように、アンテナ領域１３１ａ，１３１ｂ，１３１ｄ，１３１ｅ，１３２ａ，１３２ｂ，１３２ｄ，１３２ｅに形成されるアンテナに対して偏波方向が異なっているためアンテナ１２１ｃ，１２２ｃを基準アンテナとして利用する。 The processing unit 54 detects the resonance peak in the ID tag 101 based on the level of received power detected by the receiving unit 53, and detects the resonance peak among the frequencies assigned to the antenna regions 131a to 131e and 132a to 132e. The individual ID for the generated frequency is set to “1”, the individual ID for the frequency for which the resonance peak is not detected is set to “0”, and these “1” and “0” are arranged in the order of the frequencies, thereby obtaining the ID. The ID assigned to the tag 101 is recognized. At this time, the antennas 121c and 122c formed in the antenna regions 131c and 132c are polarized with respect to the antennas formed in the antenna regions 131a, 131b, 131d, 131e, 132a, 132b, 132d, and 132e, as described above. Since the directions are different, the antennas 121c and 122c are used as reference antennas.
　制御部５５は、送信部５２における電磁波の照射、及び処理部５４における各処理を制御する。 The control unit 55 controls the irradiation of electromagnetic waves in the transmission unit 52 and each process in the processing unit 54.
　上記のように構成されたリーダ５０を用いて、ＩＤタグ１０１に付与されたＩＤを認識する場合は、送信部５２において、アンテナ領域１３１ａ～１３１ｅ，１３２ａ～１３２ｅに割り当てられた７．０ＧＨｚ～１１．０ＧＨｚを含む周波数帯をスイープしながら当該周波数帯の電磁波を、ＩＤタグ１０１に対して送信アンテナ５１ａを介して照射する。 When the reader 50 configured as described above is used to recognize the ID assigned to the ID tag 101, the transmitting unit 52 uses 7.0 GHz to 11 assigned to the antenna regions 131a to 131e and 132a to 132e. The electromagnetic wave of the said frequency band is irradiated to the ID tag 101 via the transmission antenna 51a, sweeping the frequency band containing 0.0 GHz.
　すると、ＩＤタグ１０１からの反射波が、受信アンテナ５１ｂを介して受信部５３にて受信されて反射波の受信電力のレベルが検知され、処理部５４において、受信部５３にて検知された受信電力のレベルによって共振ピークが検出される。図６ａ～図６ｃに示したＩＤタグ１０１においては、上述したように、アンテナ領域１３１ａ，１３２ａに、７．０ＧＨｚ近傍にて共振ピークが発現したアンテナ１２１ａ，１２２ａが形成され、アンテナ領域１３１ｂ，１３２ｂに、８．０ＧＨｚ近傍にて共振ピークが発現したアンテナ１２１ｂ，１２２ｂが形成され、アンテナ領域１３１ｃ，１３２ｃに、９．０ＧＨｚ近傍にて共振ピークが発現したアンテナ１２１ｃ，１２２ｃが形成され、アンテナ領域１３１ｅ，１３２ｅに、１１．０ＧＨｚ近傍にて共振ピークが発現したアンテナ１２１ｅ，１２２ｅが形成されているため、受信部５３にて受信された反射波の受信電力は、７．０ＧＨｚ、８．０ＧＨｚ、９．０ＧＨｚ及び１１．０ＧＨｚのそれぞれにて共振ピークを有するものとなる。 Then, the reflected wave from the ID tag 101 is received by the receiving unit 53 via the receiving antenna 51b, and the level of the received power of the reflected wave is detected. In the processing unit 54, the reception detected by the receiving unit 53 is detected. A resonance peak is detected depending on the power level. In the ID tag 101 shown in FIGS. 6a to 6c, as described above, antennas 121a and 122a in which a resonance peak appears in the vicinity of 7.0 GHz are formed in the antenna regions 131a and 132a, and the antenna regions 131b and 132b. The antennas 121b and 122b having a resonance peak in the vicinity of 8.0 GHz are formed, and the antennas 121c and 122c having a resonance peak in the vicinity of 9.0 GHz are formed in the antenna regions 131c and 132c. , 132e are formed with antennas 121e, 122e having a resonance peak in the vicinity of 11.0 GHz, so that the received power of the reflected wave received by the receiving unit 53 is 7.0 GHz, 8.0 GHz, 9 Resonance peak at 0.0 GHz and 11.0 GHz .
　そして、アンテナ領域１３１ａ～１３１ｅ，１３２ａ～１３２ｅに割り当てられた周波数が１ＧＨｚずつの等間隔であることから、処理部５４において、１ＧＨｚの間隔で、共振ピークが検出された周波数についての個別ＩＤを“１”とし、共振ピークが検出されなかった周波数についての個別ＩＤを“０”とし、これら２値情報となる“１”と“０”とを、例えば周波数の低い順序に並べることで、ＩＤタグ１０１に付与されたＩＤが認識される。図６ａ～図６ｃに示したＩＤタグ１０１においては、上述したように、７．０ＧＨｚ、８．０ＧＨｚ、９．０ＧＨｚ及び１１．０ＧＨｚのそれぞれにて共振ピークが検出されるため、個別ＩＤ“１”，“１”，“１”，“０”，“１”がこの順序に並べられてなるＩＤ“１１１０１”が認識される。なおこの際、９．０ＧＨｚの共振ピークは、偏波方向が他のアンテナとは異なる基準アンテナ１２１ｃ，１２２ｃによるものであるため、他の共振ピークとは区別することができる。そのため、アンテナ領域１３１ｃ，１３２ｃには必ずアンテナ１２１ｃ，１２２ｃを形成しておくことにより、アンテナ１２１ｃ，１２２ｃの共振ピークによる個別ＩＤ“１”が中央にくるように個別ＩＤを並べることで、最も低い周波数が割り当てられたアンテナ領域１３１ａ，１３２ａや、最も高い周波数が割り当てられたアンテナ領域１３１ｅ，１３２ｅにアンテナ１２１ａ，１２２ａやアンテナ１２１ｅ，１２２ｅが形成されていない場合や、処理部５４にて検出された共振ピークが若干ずれた場合でも、ＩＤタグ１０１に付与されたＩＤを正確に認識することができる。なお、基準アンテナ１２１ｃ，１２２ｃによる共振ピークを他のアンテナのものと区別可能とするためには、反射波の波形を他のアンテナからの反射波とは異なるものとすれば、偏波方向を異ならせるものに限らない。 Since the frequencies assigned to the antenna regions 131a to 131e and 132a to 132e are equally spaced by 1 GHz, the processing unit 54 sets the individual ID for the frequency at which the resonance peak is detected at an interval of 1 GHz. The ID is set to “1”, the individual ID for the frequency for which the resonance peak is not detected is set to “0”, and “1” and “0” that are the binary information are arranged in the order of, for example, the lowest frequency, thereby the ID tag. The ID assigned to 101 is recognized. In the ID tag 101 shown in FIGS. 6a to 6c, as described above, the resonance peak is detected at 7.0 GHz, 8.0 GHz, 9.0 GHz, and 11.0 GHz. ID “11101” is recognized in which “,” “1,” “1,” “0,” “1” are arranged in this order. At this time, the 9.0 GHz resonance peak is due to the reference antennas 121c and 122c having a polarization direction different from that of the other antennas, so that it can be distinguished from the other resonance peaks. Therefore, by forming the antennas 121c and 122c in the antenna regions 131c and 132c without fail, the individual IDs are arranged so that the individual ID “1” due to the resonance peak of the antennas 121c and 122c is in the center. When the antennas 121a and 122a and the antennas 121e and 122e are not formed in the antenna regions 131a and 132a to which the frequency is assigned and the antenna regions 131e and 132e to which the highest frequency is assigned, or the processing unit 54 detects Even when the resonance peak is slightly shifted, the ID assigned to the ID tag 101 can be accurately recognized. In order to distinguish the resonance peaks of the reference antennas 121c and 122c from those of the other antennas, the polarization direction is different if the waveform of the reflected wave is different from the reflected wave from the other antenna. Not limited to
　なお、図６ａ～図６ｃに示したＩＤタグ１０１においては、ベース基材１１０ａ，１１０ｂ間にて、ベース基材１１０ａとベース基材１１０ｂとの積層面のうち少なくとも一方の全面にグランドパターン１４０が積層されているが、ベース基材１１０ａ，１１０ｂ間にて、ベース基材１１０ａとベース基材１１０ｂとの積層面のうち少なくとも一方の面にて、アンテナ領域１３１ａ～１３１ｅ，１３２ａ～１３２ｅに対向してアンテナ領域１３１ａ～１３１ｅ，１３２ａ～１３２ｅをそれぞれ覆うようにグランドパターン１４０を積層してもよい。その場合、グランドパターンが、平面視にて対向するアンテナの極わずかの領域を覆わないものであってもよく、それも併せて、平面視にてアンテナを覆う形状を有すると定義する。 In the ID tag 101 shown in FIGS. 6a to 6c, a ground pattern 140 is provided on at least one of the laminated surfaces of the base substrate 110a and the base substrate 110b between the base substrates 110a and 110b. Although laminated, the antenna regions 131a to 131e and 132a to 132e are opposed to each other between at least one of the laminated surfaces of the base substrate 110a and the base substrate 110b between the base substrates 110a and 110b. The ground pattern 140 may be laminated so as to cover the antenna regions 131a to 131e and 132a to 132e, respectively. In this case, the ground pattern may be one that does not cover a very small area of the antenna that is opposed to each other in plan view, and is defined as having a shape that covers the antenna in plan view.
　また、図６ａ～図６ｃに示したものにおいては、アンテナ領域１３１ａ～１３１ｅ，１３２ａ～１３２ｅのそれぞれに、周波数が割り当てられており、アンテナ領域１３１ａ～１３１ｃ，１３１ｅ，１３２ａ～１３２ｃ，１３２ｅに、グランドパターン１４０と対向することで、アンテナ領域１３１ａ～１３１ｃ，１３１ｅ，１３２ａ～１３２ｃ，１３２ｅに割り当てられた周波数近傍にて共振ピークが発現するアンテナ１２１ａ～１２１ｃ，１２１ｅ，１２２ａ～１２２ｃ，１２２ｅが形成されているが、共振ピークを検出するための周波数の範囲と、アンテナ領域１３１ａ～１３１ｅ，１３２ａ～１３２ｅに形成されるアンテナの共振ピークの間隔が決まっていれば、アンテナ領域１３１ａ～１３１ｅ，１３２ａ～１３２ｅのそれぞれに周波数が割り当てられていなくても、共振ピークが検出されるかどうかによって決まる個別ＩＤを並べることで、ＩＤタグに付与されたＩＤを認識することができる。 6a to 6c, frequencies are allocated to the antenna regions 131a to 131e and 132a to 132e, respectively, and the antenna regions 131a to 131c, 131e, 132a to 132c, and 132e are grounded. By facing the pattern 140, the antennas 121a to 121c, 121e, 122a to 122c, and 122e in which resonance peaks appear in the vicinity of the frequencies assigned to the antenna regions 131a to 131c, 131e, 132a to 132c, and 132e are formed. However, if the frequency range for detecting the resonance peak and the interval between the resonance peaks of the antennas formed in the antenna regions 131a to 131e and 132a to 132e are determined, the antenna regions 131a to 131e and 132a to 132e Respectively Even if no assigned frequency, by arranging the individual ID determined by whether the resonance peak is detected, it is possible to recognize the ID assigned to the ID tag.
　図８ａは、本発明の識別体の基本形態の他の例の表面の構成を示す図である。図８ｂは、図８ａに示したＡ－Ａ’断面図である。図８ｃは、本発明の識別体の基本形態の他の例の裏面の構成を示す図である。 FIG. 8a is a diagram showing the surface configuration of another example of the basic form of the discriminating body of the present invention. FIG. 8b is a cross-sectional view taken along the line A-A 'shown in FIG. 8a. FIG. 8 c is a diagram showing the configuration of the back surface of another example of the basic form of the identifier of the present invention.
　本形態における識別体は図８ａ～図８ｃに示すように、図１ａ～図１ｃに示したＩＤタグ１に対して、ベース基材１０ｂのアンテナ領域３２に形成されたアンテナ２２２の大きさが異なるＩＤタグ２０１である。 As shown in FIGS. 8a to 8c, the identification body in this embodiment differs from the ID tag 1 shown in FIGS. 1a to 1c in the size of the antenna 222 formed in the antenna region 32 of the base substrate 10b. This is the ID tag 201.
　本形態のＩＤタグ２０１においては、ベース基材１０ａのアンテナ領域３１に形成されたアンテナ２１と、ベース基材１０ｂのアンテナ領域３２に形成されたアンテナ２２２とが、その長手方向の長さが互いに異なっており、それにより、グランドパターン４０と対向することで発現する共振ピークの周波数が互いに異なるものとなっている。 In the ID tag 201 of the present embodiment, the antenna 21 formed in the antenna region 31 of the base substrate 10a and the antenna 222 formed in the antenna region 32 of the base substrate 10b have a length in the longitudinal direction of each other. Thus, the frequencies of the resonance peaks that appear when facing the ground pattern 40 are different from each other.
　図９は、図８ａ～図８ｃに示したＩＤタグ２０１の周波数特性を説明するための図である。 FIG. 9 is a diagram for explaining the frequency characteristics of the ID tag 201 shown in FIGS. 8a to 8c.
　図８ａ～図８ｃに示したＩＤタグ２０１においては、アンテナ２１が形成された面側から電磁波を照射してその反射波を受信した場合、反射波の周波数特性は、図９の実線で示すように、アンテナ２１の形状に応じて８．３ＧＨｚ近傍に共振ピークを有するものとなる。一方、アンテナ２２２が形成された面側から電磁波を照射してその反射波を受信した場合、反射波の周波数特性は、アンテナ２２２の形状がアンテナ２１の形状とは異なっていることにより、図９の破線で示すように、アンテナ２２２の形状に応じて７．７ＧＨｚ近傍に共振ピークを有するものとなる。これは、アンテナ２１が形成された面側から電磁波を照射してその反射波を受信した場合は、グランドパターン４０によって電磁波がアンテナ２２２側には貫通せず、アンテナ２２２の影響を受けずにアンテナ２１の周波数特性のみによる共振ピークが発現し、また、アンテナ２２２が形成された面側から電磁波を照射してその反射波を受信した場合は、グランドパターン４０によって電磁波がアンテナ２１側には貫通せず、アンテナ２１の影響を受けずにアンテナ２２２の周波数特性のみによる共振ピークが発現するためである。 In the ID tag 201 shown in FIGS. 8a to 8c, when the reflected wave is received by irradiating the electromagnetic wave from the surface side on which the antenna 21 is formed, the frequency characteristic of the reflected wave is as shown by the solid line in FIG. Furthermore, it has a resonance peak in the vicinity of 8.3 GHz according to the shape of the antenna 21. On the other hand, when an electromagnetic wave is irradiated from the surface side where the antenna 222 is formed and the reflected wave is received, the frequency characteristic of the reflected wave is different from the shape of the antenna 21 in FIG. As indicated by the broken line, a resonance peak is present in the vicinity of 7.7 GHz according to the shape of the antenna 222. This is because when the electromagnetic wave is irradiated from the surface side on which the antenna 21 is formed and the reflected wave is received, the electromagnetic wave does not penetrate the antenna 222 side by the ground pattern 40, and the antenna 222 is not affected by the antenna 222. When the resonance peak due to only the frequency characteristic of the antenna 21 appears, and when the reflected wave is received by irradiating the electromagnetic wave from the surface side where the antenna 222 is formed, the electromagnetic wave penetrates the antenna 21 side by the ground pattern 40. This is because a resonance peak due to only the frequency characteristic of the antenna 222 appears without being affected by the antenna 21.
　このように、本形態におけるＩＤタグ２０１においては、ベース基材１０ａ，１０ｂを介してグランドパターン４０の表裏に対向して設けられたアンテナ２１，２２２が、グランドパターン４０と対向することで発現する共振ピークの周波数が互いに異なるものであることにより、ＩＤタグ２０１の表裏を判定することができる。また、アンテナ２１による共振ピークに応じたＩＤと、アンテナ２２２による共振ピークに応じたＩＤとの２つのＩＤをＩＤタグ２０１の使用方法に応じて表すことができる。 Thus, in the ID tag 201 in this embodiment, the antennas 21 and 222 provided to face the front and back of the ground pattern 40 via the base substrates 10a and 10b are manifested by facing the ground pattern 40. Since the resonance peak frequencies are different from each other, the front and back of the ID tag 201 can be determined. Also, two IDs, an ID corresponding to the resonance peak due to the antenna 21 and an ID corresponding to the resonance peak due to the antenna 222, can be expressed according to the usage method of the ID tag 201.
　図１０ａは、図１ａ～図１ｃに示したＩＤタグ１の実用例を示す表面図である。図１０ｂは、図１０ａに示したＡ－Ａ’断面図である。 FIG. 10a is a surface view showing a practical example of the ID tag 1 shown in FIGS. 1a to 1c. FIG. 10B is a cross-sectional view taken along the line A-A ′ shown in FIG. 10A.
　図１ａ～図１ｃに示したＩＤタグ１は、例えば図１０ａ及び図１０ｂに示すように、樹脂等の絶縁性材料からなる２枚の表面基材６１ａ，６１ｂによって表裏から挟み込まれてチップレスカード６０として使用することができる。その場合、図１０ａ及び図１０ｂに示すように、ベース基材１０ａのアンテナ２１が形成された面上に表面基材６１ａを積層し、接着層７０ａによってベース基材１０ａと表面基材６１ａとを接着するとともに、ベース基材１０ｂのアンテナ２２が形成された面上に表面基材６１ｂを積層し、ベース基材１０ｂと表面基材６１ｂとを接着層７０ｂによって接着し、チップレスカード６０を構成することが考えられる。なお、ベース基材１０ａ，１０ｂと表面基材６１ａ，６１ｂとの接着は、接着層７０ａ，７０ｂによらずに融着等の手段によってもよい。 The ID tag 1 shown in FIGS. 1a to 1c is sandwiched from the front and back by two surface base materials 61a and 61b made of an insulating material such as a resin as shown in FIGS. 10a and 10b. 60 can be used. In that case, as shown in FIGS. 10a and 10b, the surface base 61a is laminated on the surface of the base base 10a on which the antenna 21 is formed, and the base base 10a and the surface base 61a are bonded by the adhesive layer 70a. The base substrate 10b is laminated on the surface of the base substrate 10b on which the antenna 22 is formed, and the base substrate 10b and the surface substrate 61b are bonded together by the adhesive layer 70b to form the chipless card 60. It is possible to do. The base substrates 10a and 10b and the surface substrates 61a and 61b may be bonded by means such as fusion without depending on the adhesive layers 70a and 70b.
　上記のように構成されたチップレスカード６０においても、図１ａ～図１ｃに示したＩＤタグ１が内蔵されていることで、人の手等の誘電体に接触した状態においても、表裏のいずれの面側から電磁波を照射してその反射波を受信しても、アンテナ２１，２２による共振ピークを検出することができ、ＩＤを正しく認識することができる。 Also in the chipless card 60 configured as described above, the ID tag 1 shown in FIGS. 1a to 1c is built-in, so that even if it is in contact with a dielectric such as a human hand, it can be Even if an electromagnetic wave is irradiated from the surface side of the antenna and the reflected wave is received, the resonance peak by the antennas 21 and 22 can be detected, and the ID can be recognized correctly.
　図１１ａは、図１ａ～図１ｃに示したＩＤタグ１の変形実用例を示す表面図である。図１１ｂは、図１１ａに示したＡ－Ａ’断面図である。 FIG. 11a is a surface view showing a modified practical example of the ID tag 1 shown in FIGS. 1a to 1c. FIG. 11b is a cross-sectional view taken along the line A-A 'shown in FIG. 11a.
　本実用例は図１１ａ及び図１１ｂに示すように、樹脂等の絶縁性材料からなる薄型のケース状の枠部材１６１に、図１ａ～図１ｃに示したグランドパターン４０の代わりに導電板１４０が収納されるとともに、この導電板１４０に対向してアンテナ２１，２２が設けられたチップレスカード１６０である。 In this practical example, as shown in FIGS. 11a and 11b, a thin case-like frame member 161 made of an insulating material such as resin is provided with a conductive plate 140 instead of the ground pattern 40 shown in FIGS. 1a to 1c. The chipless card 160 is accommodated and provided with antennas 21 and 22 facing the conductive plate 140.
　導電板１４０は、枠部材１６１の天面及び底面と平行にこれらの中間点に配置されており、アンテナ２１は枠部材１６１の天面の内側の面に、アンテナ２２は枠部材１６１の底面の内側の面にそれぞれ形成されている。それにより、アンテナ２１，２２と導電板１４０との間にはそれぞれ、絶縁層となる空間１１０ａ，１１０ｂが生じている。 The conductive plate 140 is disposed at an intermediate point between the top surface and the bottom surface of the frame member 161, the antenna 21 is disposed on the inner surface of the top surface of the frame member 161, and the antenna 22 is disposed on the bottom surface of the frame member 161. Each is formed on the inner surface. As a result, spaces 110 a and 110 b serving as insulating layers are formed between the antennas 21 and 22 and the conductive plate 140, respectively.
　上記のように構成されたチップレスカード１６０においても、導電板１４０と対向することで共振ピークが発現するアンテナ２１，２２が、絶縁層となる空間１１０ａ，１１０ｂを介して導電板１４０の表裏のそれぞれに対向して設けられ、導電板１４０が平面視にてアンテナ２１，２２を覆う形状を有していることで、人の手等の誘電体に接触した状態においても、表裏のいずれの面側から電磁波を照射してその反射波を受信しても、アンテナ２１，２２による共振ピークを検出することができ、ＩＤを正しく認識することができる。 Also in the chipless card 160 configured as described above, the antennas 21 and 22 that exhibit resonance peaks when facing the conductive plate 140 are connected to the front and back surfaces of the conductive plate 140 via the spaces 110a and 110b serving as insulating layers. Even if the conductive plate 140 has a shape that covers the antennas 21 and 22 in a plan view, both surfaces of the front and back sides are provided, facing each other. Even if an electromagnetic wave is irradiated from the side and the reflected wave is received, the resonance peak by the antennas 21 and 22 can be detected, and the ID can be recognized correctly.
　１，１０１，２０１　　ＩＤタグ
　１０ａ，１０ｂ，１１０ａ，１１０ｂ　　ベース基材
　２１，２２，１２１ａ～１２１ｃ，１２１ｅ，１２２ａ～１２２ｃ，１２２ｅ，２２２　　アンテナ
　１３１ａ～１３１ｅ，１３２ａ～１３２ｅ　　アンテナ領域
　４０，１４０　　グランドパターン
　５０　　リーダ
　５１ａ　　送信アンテナ
　５１ｂ　　受信アンテナ
　５２　　送信部
　５３　　受信部
　５４　　処理部
　５５　　制御部
　６０，１６０　　チップレスカード
　６１ａ，６１ｂ　　表面基材
　７０ａ，７０ｂ　　接着層
　１１０ａ，１１０ｂ　　空間
　１４０　　導電板
　１６１　　枠部材 1, 101, 201 ID tag 10a, 10b, 110a, 110b Base substrate 21, 22, 121a-121c, 121e, 122a-122c, 122e, 222 Antenna 131a-131e, 132a- 132e Antenna area 40, 140 Ground pattern 50 Reader 51a Transmission antenna 51b Reception antenna 52 Transmission unit 53 Reception unit 54 Processing unit 55 Control unit 60, 160 Chipless card 61a, 61b Surface base material 70a, 70b Adhesive layer 110a, 110b Space 140 Conductive plate 161 Frame member

Claims (4)

  1. 　導電層と、
    　絶縁層を介して前記導電層の表裏のそれぞれに対向して設けられ、前記導電層と対向することで共振ピークが発現するアンテナとを有し、
    　前記導電層は、平面視にて前記アンテナを覆う形状を有する、識別体。     A conductive layer;
    An antenna that is provided opposite to each of the front and back surfaces of the conductive layer via an insulating layer, and that exhibits a resonance peak by facing the conductive layer;
    The conductive layer is an identification body having a shape that covers the antenna in a plan view.
  2. 　請求項１に記載の識別体において、
    　前記アンテナは、前記導電層に対向しない状態におけるＱ値が３０以下である、識別体。     The identification object according to claim 1,
    The antenna is an identification body having a Q value of 30 or less when not facing the conductive layer.
  3. 　請求項１または請求項２に記載の識別体において、
    　前記絶縁層を介して前記導電層の表裏のそれぞれに対向して設けられたアンテナは、前記導電層と対向することで発現する共振ピークの周波数が互いに異なる、識別体。     In the identification object according to claim 1 or 2,
    The antenna provided opposite to each of the front and back sides of the conductive layer with the insulating layer interposed therebetween is a discriminator in which the frequencies of resonance peaks that appear when facing the conductive layer are different from each other.
  4. 　請求項１乃至３のいずれか１項に記載の識別体において、
    　前記アンテナが前記絶縁層を介して前記導電層に対向して設けられる複数の領域を有し、
    　前記アンテナは、前記導電層に対向することによって発現する共振ピークの周波数が前記複数の領域毎に異なり、
    　前記複数の領域のそれぞれは、前記アンテナが設けられた領域と、前記アンテナが設けられていない領域とのいずれか一方であり、
    　前記複数の領域毎に共振ピークが検出されるか否かによる２値情報の組み合わせによって識別情報を表す、識別体。     The identification body according to any one of claims 1 to 3,
    The antenna has a plurality of regions provided to face the conductive layer through the insulating layer,
    In the antenna, the frequency of the resonance peak expressed by facing the conductive layer is different for each of the plurality of regions,
    Each of the plurality of regions is one of a region where the antenna is provided and a region where the antenna is not provided.
    An identifier that represents identification information by a combination of binary information based on whether or not a resonance peak is detected for each of the plurality of regions.
PCT/JP2017/041436 2016-12-14 2017-11-17 Discriminating medium WO2018110201A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002185281A (en) * 2000-12-14 2002-06-28 Lintec Corp Oscillation circuit
JP2004246816A (en) * 2003-02-17 2004-09-02 Mitsubishi Materials Corp Rfid system and mutual interference suppression method for rfid tag
JP2016103673A (en) * 2014-11-27 2016-06-02 トッパン・フォームズ株式会社 Identifying body and discrimination system for discriminating id of the identifying body

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002185281A (en) * 2000-12-14 2002-06-28 Lintec Corp Oscillation circuit
JP2004246816A (en) * 2003-02-17 2004-09-02 Mitsubishi Materials Corp Rfid system and mutual interference suppression method for rfid tag
JP2016103673A (en) * 2014-11-27 2016-06-02 トッパン・フォームズ株式会社 Identifying body and discrimination system for discriminating id of the identifying body

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