WO2020059154A1 - Wireless communication substrate and wireless communication tag - Google Patents

Wireless communication substrate and wireless communication tag Download PDF

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Publication number
WO2020059154A1
WO2020059154A1 PCT/JP2018/035232 JP2018035232W WO2020059154A1 WO 2020059154 A1 WO2020059154 A1 WO 2020059154A1 JP 2018035232 W JP2018035232 W JP 2018035232W WO 2020059154 A1 WO2020059154 A1 WO 2020059154A1
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WO
WIPO (PCT)
Prior art keywords
wireless communication
antenna
wireless
electrode
chip
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Application number
PCT/JP2018/035232
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French (fr)
Japanese (ja)
Inventor
康志 和田
岡野　好伸
信 若林
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ヨメテル株式会社
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Application filed by ヨメテル株式会社 filed Critical ヨメテル株式会社
Priority to PCT/JP2018/035232 priority Critical patent/WO2020059154A1/en
Priority to JP2018554514A priority patent/JP6476356B1/en
Publication of WO2020059154A1 publication Critical patent/WO2020059154A1/en

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    • 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
    • G06K19/07—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 with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support

Definitions

  • the present invention relates to a wireless communication board and a wireless communication tag.
  • Patent Literature 1 discloses a configuration in which a wireless IC chip is arranged in a cavity provided in a laminated substrate having electrodes, and the wireless IC chip is sealed in the cavity by a sealing material. Is disclosed.
  • the wireless IC chip is sealed in the cavity of the laminated substrate. Therefore, when, for example, a wireless IC chip is replaced with another wireless IC chip or the shape of an electrode on a laminated substrate is changed in accordance with a change in required specifications of a wireless communication tag, the wireless IC chip and the laminated substrate Both had to be changed and there was room for improvement in component compatibility.
  • an object of the present invention is to provide a wireless communication board that can ensure the compatibility of components when, for example, changing required specifications.
  • a wireless communication board is provided with a conductive mounting antenna portion on which a wireless IC chip is mounted, and an electrode for performing electric field coupling with the mounting antenna portion.
  • the antenna device includes an antenna body disposed in the stacking direction, and an insulating first spacer laminated between the mounted antenna and the antenna body.
  • the antenna body includes an electrode and a base material that supports the electrode.
  • the electrode and the base material are arranged side by side in the stacking direction, and the electrodes face each other with a part thereof being spaced apart in the stacking direction. It may be bent so that it does.
  • the antenna body has a rectangular shape in a plan view as viewed from the lamination direction, and the electrodes, except in the center in the long side direction along the long side, in plan view as viewed from the short side direction along the short side. , May be bent so that some of them face each other at intervals in the stacking direction.
  • the mounted antenna unit includes a pair of wings arranged at intervals, and the pair of wings has a rectangular shape in a plan view as viewed from the stacking direction, and the size of one side L (mm) is ,
  • the following equation (1) may be satisfied. ⁇ / 100 ⁇ L ⁇ ⁇ / 10 (1)
  • ⁇ Wavelength of radio wave used by wireless IC chip (mm)
  • the thickness T (mm) of the first spacer portion in the laminating direction may satisfy the following expression (2). ⁇ / 10000 ⁇ L ⁇ ⁇ / 100 (2) ⁇ : Wavelength of radio wave used by wireless IC chip (mm)
  • a conductive reflective material laminated on the opposite side of the mounted antenna portion sandwiching the antenna body in the laminating direction, and an insulating second spacer portion laminated between the antenna body and the reflective material, May be provided.
  • a wireless tag includes any one of the wireless communication boards described above and a wireless IC chip mounted on a mounting antenna unit.
  • the first spacer portion is stacked between the mounting antenna portion on which the wireless IC chip is mounted and the antenna main body portion on which the electrodes are arranged, and the wireless IC chip and the electrode Are arranged as separate members. For this reason, when replacing the wireless IC chip with another wireless IC chip or changing the shape of the electrode by changing the required specifications, one of the components of the mounted antenna section and the antenna main body section is changed. That is enough, there is no need to change the other part. Thus, for example, when a required specification is changed, parts that do not need to be changed can be diverted to a product with a new specification, and compatibility of the parts can be ensured.
  • FIG. 2 is an exploded perspective view showing the wireless communication tag according to the first embodiment of the present invention.
  • FIG. 2 is a sectional view taken along line XX of the antenna main body shown in FIG. 1. It is a figure which shows the operation
  • B) shows a state in which a current flows through the antenna body due to the influence of the electromagnetic wave.
  • D A state in which a current flows through the mounted antenna unit when information is read from the wireless IC chip.
  • FIG. 2 is a schematic diagram illustrating a state where an antenna main body is replaced in the wireless communication tag illustrated in FIG. 1.
  • FIG. 4 is an exploded perspective view showing a first modification of the wireless communication tag shown in FIG. 1. It is a schematic diagram which shows (a) 2nd modification, (b) 3rd modification, and (c) 4th modification of the wireless communication tag shown in FIG.
  • FIG. 13 is an exploded perspective view showing a fifth modification of the wireless communication tag shown in FIG. 1.
  • FIG. 8 is a sectional view taken along the line YY of the antenna main body shown in FIG. 7.
  • FIG. 13 is a schematic diagram showing a sixth modification of the wireless communication tag shown in FIG. 1.
  • the wireless communication tag 1 is a communication module for exchanging information by performing wireless communication between a mounted wireless IC chip 2 and an external communication reader (not shown).
  • the wireless communication tag 1 includes a wireless IC chip 2 and a wireless communication board 3 holding the wireless IC chip 2.
  • a wireless IC chip 2 for example, a UCODE (registered trademark) 8 chip or the like can be used as generally used in an RFID system.
  • the wireless communication board 3 includes a mounting antenna section 10 on which the wireless IC chip 2 is mounted, an antenna main body section 11 arranged in the stacking direction with respect to the mounting antenna section 10, and a mounting antenna section 10. And an insulating first spacer portion 12 laminated between the antenna and the antenna main body portion 11.
  • the mounting antenna unit 10, the antenna main body unit 11, and the first spacer unit 12 have a rectangular shape in a plan view (hereinafter, simply referred to as a plan view) when viewed from the lamination direction.
  • the mounted antenna unit 10 is in the form of a film having conductivity.
  • a metal material is employed for the mounting antenna unit 10.
  • the mounted antenna unit 10 has a rectangular shape having short sides and long sides as a whole in a plan view (hereinafter, referred to as a top view) when viewed from the stacking direction.
  • the mounted antenna unit 10 is composed of an aluminum film having a thickness of 9 ⁇ m and a PET resin film having a thickness of 50 ⁇ m.
  • the aluminum film is bonded to the PET resin film with an adhesive.
  • the thickness of the adhesive layer is 5 ⁇ m.
  • the aluminum film may be changed to another metal material, and the PET resin film may be changed to another resin material. Also, the thickness of each can be arbitrarily changed.
  • the mounted antenna section 10 includes a pair of wing sections 10A arranged at an interval.
  • the pair of wings 10A have a rectangular shape in a range that does not protrude from the outer edge of the antenna main body 11 in a top view, and have a size equal to each other or a combination of asymmetric rectangles.
  • the pair of wing portions 10A are arranged at intervals in the long side direction.
  • the wing portion 10A has conductivity and functions substantially as an antenna for transmitting and receiving electric signals to and from the outside.
  • the wireless IC chip 2 is disposed between the pair of wings 10A, and the wing 10A and the wireless IC chip 2 are electrically connected. Thereby, the wireless IC chip 2 electrically connects the pair of wings 10A.
  • the wireless IC chip 2 is disposed at one end of the mounting antenna unit 10 in the short side direction. The position of the wireless IC chip 2 with respect to the mounting antenna unit 10 can be arbitrarily changed.
  • the size L (mm) of one side of the wing portion 10A in a top view satisfies the following expression (1).
  • ⁇ indicates the wavelength (mm) of the radio wave used by the wireless IC chip 2.
  • the wireless IC chip 2 uses radio waves of a frequency of 920 MHz, but radio waves of other frequencies may be used.
  • the wavelength ⁇ of the radio wave used by the wireless IC chip 2 is 326 mm
  • the size L of one side of the wing 10A is 20 mm.
  • the first spacer portion 12 has a rectangular shape having a short side and a long side when viewed from above.
  • the size of the short side of the first spacer section 12 is equal to the size of the short side of the mounting antenna section 10.
  • the size of the long side of the first spacer section 12 is equal to the size of the long side of the mounting antenna section 10.
  • the size of each of the short side and the long side of the first spacer unit 12 may be smaller or larger than the size of each of the short side and the long side of the mounting antenna unit 10.
  • the thickness T (mm) of the first spacer portion 12 in the stacking direction satisfies the following expression (2).
  • ⁇ indicates the wavelength (mm) of the radio wave used by the wireless IC chip 2.
  • the wavelength ⁇ of the radio wave used by the wireless IC chip 2 is 326 mm
  • the thickness T of the first spacer portion 12 in the stacking direction is 0.15 to 0.2 mm.
  • the antenna body 11 includes an electrode 11A that is electrically coupled to the wing 10A of the mounted antenna 10, and a base material 11B that supports the electrode 11A.
  • the electrode 11A and the base material 11B are arranged side by side in the laminating direction and are integrally formed.
  • the antenna main body 11 has a rectangular shape having a short side and a long side when viewed from above.
  • the size of the short side of the antenna main body 11 as viewed from above is the same as the size of the short side of the first spacer 12.
  • the size of the long side of the antenna body 11 as viewed from above is larger than the size of the long side of the first spacer 12.
  • the electrode 11A is bent such that a part thereof faces each other at intervals in the laminating direction.
  • the electrodes 11A and the base material 11B are partially laminated in the stacking direction except for a central portion in the long side direction along the long side when viewed from the short side direction along the short side. Are bent so as to face each other at intervals.
  • the electrode 11A and the base material 11B are formed in a loop shape opened in the short side direction in a front view, and are adhered to each other over the entire area. As shown in the figure, the electrode 11A is arranged on the outer peripheral side of the base material 11B when viewed from the front. The electrode 11A has a size corresponding to the frequency of a radio wave used by the wireless IC chip 2.
  • a gap CL is formed between portions of the antenna body 11 that are opposed to each other in the stacking direction on the base material 11B arranged on the inner peripheral side.
  • the size C1 of the gap CL in the stacking direction is about 500 to 1000 ⁇ m.
  • the electrode 11A is formed of a 9 ⁇ m thick aluminum film
  • the base material 11B is formed of a 50 ⁇ m thick PET resin film.
  • the thickness of the adhesive layer for bonding the electrode 11A and the base material 11B is 5 ⁇ m.
  • the aluminum film may be changed to another metal material, and the PET resin film may be changed to another resin material. Also, the thickness of each can be arbitrarily changed.
  • the loop-shaped electrode 11A has a slit 11C formed between one end and the other end of the loop.
  • a slit 11C extending in the short side direction is formed on the first spacer portion 12 side (upper side) in the stacking direction in the antenna body portion 11.
  • the slit 11C extends over the entire area in the short side direction.
  • the slit 11C is formed integrally with each of the electrode 11A and the base 11B.
  • the size L1 of the slit 11C in the long side direction is about 1/50 to 1/100 of the size L2 of the antenna body 11 in the long side direction.
  • the wireless IC chip 2 is disposed in a portion located above the slit 11C.
  • a plurality of cutouts 11D are formed in the antenna body 11.
  • the notch 11D is formed from the upper surface to the side surface of the antenna main body 11.
  • the notch 11D integrally cuts off the electrode 11A and a part of the base 11B.
  • the cutout portion 11D By forming the cutout portion 11D in this way, it is possible to make the path length of the current flowing portion of the electrode 11A longer than the configuration in which the cutout portion 11D is not formed. Thereby, the electromagnetic wave to be used can be set to a low frequency while the projected area of the antenna main body 11 is reduced. Note that the shape, size, and position of the notch 11D can be arbitrarily changed.
  • the wireless communication board 3 includes a conductive reflective material 13 laminated on the opposite side of the mounting antenna unit 10 sandwiching the antenna main body 11 in the laminating direction, and a second reflective laminate between the antenna main body 11 and the reflective material 13. And two spacer portions 14.
  • the reflector 13 is formed of a metal material. The size of the reflector 13 in a top view is equivalent to that of the antenna body 11. By arranging the reflecting material 13, it is possible to suppress a large change in the communication capability of the wireless IC chip 2 when the wireless communication board 3 is temporarily attached to a metal surface.
  • the second spacer portion 14 is formed of PET resin and has an insulating property.
  • the thickness of the second spacer section 14 is equal to the thickness of the first spacer section 12.
  • the size of the second spacer portion 14 as viewed from above is the same as that of the reflective material 13. Since the second spacer portion 14 is interposed between the antenna main body 11 and the reflector 13, conduction between the antenna main body 11 and the reflector 13 can be suppressed.
  • FIG. 3A the illustration of the reflection material 13 and the second spacer portion 14 is omitted.
  • an electromagnetic wave emitted from a communication reader (not shown) is caught.
  • the antenna main body 11 catches a magnetic field component generated by the electromagnetic wave and flowing in the short side direction.
  • an electromagnetic wave passes through the inside of the loop-shaped antenna main body 11, so that electromagnetic induction occurs on the electrode 11 ⁇ / b> A of the antenna main body 11.
  • a current flows through the electrode 11A.
  • the wireless IC chip 2 When the wireless IC chip 2 is activated, the wireless IC chip 2 generates a current in order to output information held therein. As a result, as shown in FIG. 3D, a current flows in a direction opposite to the current flowing to the mounted antenna unit 10 at the time of startup. This current includes information held inside the wireless IC chip 2.
  • the communication reader can read the information in the wireless IC chip 2 by reading the electromagnetic waves generated in this manner by the communication reader.
  • the first antenna unit 10 on which the wireless IC chip 2 is mounted and the antenna body 11 on which the electrode 11A is arranged are disposed
  • One spacer section 12 is stacked, and the wireless IC chip 2 and the electrode 11A are arranged as separate members.
  • the mounting antenna unit 10 and the antenna body It is sufficient to change one of the parts of the unit 11, and it is not necessary to change the other part.
  • the frequency band of the electromagnetic wave caught by the antenna main body 11 can be freely changed.
  • the illustration of the reflection material 13 and the second spacer portion 14 is omitted.
  • the electrode 11A is bent so that a part thereof faces each other with an interval in the stacking direction. Therefore, by forming a space surrounded by the electrode 11A as compared with a configuration in which the electrode 11A is formed in a plate shape, for example, electromagnetic induction is caused in the electrode 11A by an electromagnetic wave passing through the inside. be able to. As a result, the antenna output is ensured even for non-metallic objects (including those having a large amount of water such as a human body or a container containing water) whose communication has been unstable in the conventional RFID system, and stable communication is performed. be able to.
  • the antenna main body 11 has a rectangular shape in a top view, and the electrode 11A is bent such that a part thereof faces each other with a space therebetween in the laminating direction except for a central portion in a long side direction. . Therefore, when the wireless communication tag 1 is attached to the surface of an object and used, for example, the electromagnetic wave colliding with the surface of the object and flowing in the short side direction along the surface is generated inside the antenna body 11. It becomes possible to catch, and communication stability can be effectively secured.
  • the pair of wings 10A of the mounted antenna 10 have a rectangular shape in a top view, and the size L of one side thereof satisfies Expression (1). Therefore, even when the insulating first spacer portion 12 is laminated between the mounting antenna portion 10 and the antenna body portion 11, the degree of electrical coupling between the wireless IC chip 2 and the electrode 11A is reduced. As a result, the transfer of electric energy between the wireless IC chip 2 and the electrode 11A can be reliably realized.
  • the thickness T of the first spacer portion 12 in the stacking direction satisfies the expression (2). Therefore, even when the insulating first spacer portion 12 is laminated between the mounting antenna portion 10 and the antenna body portion 11, the degree of electrical coupling between the wireless IC chip 2 and the electrode 11A is reduced. As a result, the transfer of electric energy between the wireless IC chip 2 and the electrode 11A can be reliably realized.
  • the wireless communication board 3 includes the conductive reflector 13 and the second spacer 14 laminated between the antenna body 11 and the reflector 13. For this reason, when the wireless communication substrate 3 is attached to a metal surface, it is possible to suppress a large change in the communication capability of the wireless IC chip 2 as compared with, for example, a configuration in which the reflective material 13 is not provided. Thereby, the fluctuation of the communication capability of the wireless IC chip 2 can be suppressed, and the versatility can be secured without selecting the material of the surface to which the wireless communication substrate 3 is attached.
  • the loop-shaped electrode 11A opened in the short side direction targets electromagnetic waves flowing in the short side direction. For this reason, even if the electromagnetic waves flowing in the stacking direction are reflected by the reflector 13, it is possible to suppress a decrease in the antenna output.
  • FIGS. 6 and 9 the illustration of the reflector 13 and the second spacer portion 14 is omitted.
  • a cutout 21D is formed only on the side surface of the antenna main body 21. Note that the notch may not be formed in the antenna main body 21.
  • the position of the slit 31C in the electrode 31A of the antenna main body 31 is a side surface in a front view.
  • the size of the slit 41C in the antenna main body 41 is larger than that in the first embodiment.
  • the size of the slit 41C in the long side direction is about 70% of the size of the antenna body 41 in the long side direction.
  • a slit 51C whose size in the long side direction is about 70% of the size of the antenna main body 51 is formed in a front view. It may be arranged on the lower side.
  • the antenna main body 61 has a configuration other than the central portion in the short side direction when viewed from the side viewed from the long side direction. Some of them may be bent so as to face each other with an interval in the stacking direction. As illustrated, the electrode 61A is arranged on the outer peripheral side of the base material 61B in a side view.
  • the antenna main body 61 mainly targets an electromagnetic wave flowing in the long side direction.
  • the two antenna main bodies 71 and 72 are arranged so as to sandwich the mounted antenna 10 in the stacking direction.
  • the first spacer portions 12 are separately arranged between the antenna body portions 71 and 72 and the mounted antenna portion 10.
  • the two antenna main bodies 71 and 72 have different sizes in the long side direction.
  • a configuration is shown in which the size of one side of the pair of wing portions 10A having a rectangular shape in a top view satisfies Expression (1), but is not limited thereto. .
  • the size of one side of the pair of wings 10A does not have to satisfy Expression (1), and the wing 10A has a non-rectangular shape such as a circular shape or a triangular shape in a top view. Is also good.
  • the configuration is described in which the thickness T of the first spacer portion 12 in the stacking direction satisfies the expression (2), but is not limited to such a mode.
  • the thickness T of the first spacer portion 12 in the stacking direction does not have to satisfy the expression (2).
  • the configuration in which the wireless communication board 3 includes the reflecting member 13 and the second spacer portion 14 has been described.
  • the configuration is not limited to such an aspect.
  • the wireless communication board 3 does not need to include the reflection member 13 and the second spacer portion 14.

Abstract

This wireless communication substrate is provided with: a conductive mounted antenna part on which a wireless IC chip is mounted; an antenna body part on which is disposed an electrode that forms an electrical field coupling with the mounted antenna part, and which is disposed in the stacking direction with respect to the mounted antenna part; and a first insulating spacer part that is stacked between the mounted antenna part and the antenna body part.

Description

無線通信基板、および無線通信タグWireless communication board and wireless communication tag
　本発明は、無線通信基板、および無線通信タグに関する。 << The present invention relates to a wireless communication board and a wireless communication tag.
　従来、社員証等のＩＤカードや、在庫管理用のタグに用いられる無線通信タグとして、ＲＦＩＤ（radio frequency identifier）システムを用いた非接触型の無線通信タグが知られている。
　このような無線通信タグとして、下記特許文献１には、電極を有する積層基板に設けられたキャビティ内に無線ＩＣチップが配置され、封止材によりキャビティ内に無線ＩＣチップが封止された構成が開示されている。 2. Description of the Related Art A non-contact wireless communication tag using an RFID (radio frequency identifier) system has been known as a wireless communication tag used for an ID card such as an employee ID card or an inventory management tag.
As such a wireless communication tag, Patent Literature 1 below discloses a configuration in which a wireless IC chip is arranged in a cavity provided in a laminated substrate having electrodes, and the wireless IC chip is sealed in the cavity by a sealing material. Is disclosed.
国際公開第２０１１／１０８３４０号International Publication No. 2011/108340
　ここで、従来の無線通信タグでは、積層基板のキャビティ内に無線ＩＣチップが封止されている。このため、無線通信タグの要求仕様の変更に応じて、例えば無線ＩＣチップを他の無線ＩＣチップと交換したり、積層基板における電極の形状を変更したりする場合に、無線ＩＣチップおよび積層基板の両方を変更する必要があり、部品の互換性に改善の余地があった。 Here, in the conventional wireless communication tag, the wireless IC chip is sealed in the cavity of the laminated substrate. Therefore, when, for example, a wireless IC chip is replaced with another wireless IC chip or the shape of an electrode on a laminated substrate is changed in accordance with a change in required specifications of a wireless communication tag, the wireless IC chip and the laminated substrate Both had to be changed and there was room for improvement in component compatibility.
　そこで本発明は、例えば要求仕様の変更等に際して、部品の互換性を確保することができる無線通信基板を提供することを目的とする。 Therefore, an object of the present invention is to provide a wireless communication board that can ensure the compatibility of components when, for example, changing required specifications.
　上記課題を解決するために、本発明の無線通信基板は、無線ＩＣチップが搭載される導電性の搭載アンテナ部と、搭載アンテナ部と電界結合がなされる電極が配置され、かつ搭載アンテナ部に対して積層方向に配置されたアンテナ本体部と、搭載アンテナ部とアンテナ本体部との間に積層された絶縁性の第１スペーサ部と、を備えている。 In order to solve the above problems, a wireless communication board according to the present invention is provided with a conductive mounting antenna portion on which a wireless IC chip is mounted, and an electrode for performing electric field coupling with the mounting antenna portion. The antenna device includes an antenna body disposed in the stacking direction, and an insulating first spacer laminated between the mounted antenna and the antenna body.
　また、アンテナ本体部は、電極と、電極を支持する基材と、を備え、電極および基材は、積層方向に並べて配置され、電極は、その一部同士が積層方向に間隔をあけて対向するように折り曲げられてもよい。 The antenna body includes an electrode and a base material that supports the electrode. The electrode and the base material are arranged side by side in the stacking direction, and the electrodes face each other with a part thereof being spaced apart in the stacking direction. It may be bent so that it does.
　また、アンテナ本体部は、積層方向から見た平面視で長方形状をなし、電極は、短辺に沿う短辺方向から見た平面視で、長辺に沿う長辺方向における中央部を除いて、その一部同士が積層方向に間隔をあけて対向するように折り曲げられてもよい。 In addition, the antenna body has a rectangular shape in a plan view as viewed from the lamination direction, and the electrodes, except in the center in the long side direction along the long side, in plan view as viewed from the short side direction along the short side. , May be bent so that some of them face each other at intervals in the stacking direction.
　また、搭載アンテナ部は、間隔をあけて配置された一対の翼部を備え、一対の翼部は、積層方向から見た平面視で矩形状をなし、１辺の大きさＬ（ｍｍ）は、下記式（１）を満たしてもよい。
　λ／１００≦Ｌ≦λ／１０…（１）
　λ：無線ＩＣチップが使用する電波の波長（ｍｍ） Further, the mounted antenna unit includes a pair of wings arranged at intervals, and the pair of wings has a rectangular shape in a plan view as viewed from the stacking direction, and the size of one side L (mm) is , The following equation (1) may be satisfied.
λ / 100 ≦ L ≦ λ / 10 (1)
λ: Wavelength of radio wave used by wireless IC chip (mm)
　また、第１スペーサ部の積層方向における厚みＴ（ｍｍ）は、下記式（２）を満たしてもよい。
　λ／１００００≦Ｌ≦λ／１００…（２）
　λ：無線ＩＣチップが使用する電波の波長（ｍｍ） Further, the thickness T (mm) of the first spacer portion in the laminating direction may satisfy the following expression (2).
λ / 10000 ≦ L ≦ λ / 100 (2)
λ: Wavelength of radio wave used by wireless IC chip (mm)
　また、アンテナ本体部を積層方向に挟む搭載アンテナ部の反対側に積層された導電性の反射材と、アンテナ本体部と反射材との間に積層された絶縁性の第２スペーサ部と、を備えてもよい。 Further, a conductive reflective material laminated on the opposite side of the mounted antenna portion sandwiching the antenna body in the laminating direction, and an insulating second spacer portion laminated between the antenna body and the reflective material, May be provided.
　上記課題を解決するために、本発明の無線通タグは、前述したいずれかの無線通信基板と、搭載アンテナ部に搭載された無線ＩＣチップと、を備えている。 To solve the above problem, a wireless tag according to the present invention includes any one of the wireless communication boards described above and a wireless IC chip mounted on a mounting antenna unit.
　本発明の無線通信基板によれば、無線ＩＣチップが搭載される搭載アンテナ部と、電極が配置されたアンテナ本体部と、の間に、第１スペーサ部が積層され、無線ＩＣチップと電極とが別部材としてそれぞれ配置されている。
　このため、要求仕様の変更により、無線ＩＣチップを他の無線ＩＣチップと交換したり、電極の形状を変更したりする場合に、搭載アンテナ部およびアンテナ本体部のいずれか一方の部品を変更することで足り、他方の部品を変更する必要が無い。
　これにより、例えば要求仕様の変更等に際して、変更を必要としない部品を新たな仕様の製品に転用することが可能になり、部品の互換性を確保することができる。 According to the wireless communication board of the present invention, the first spacer portion is stacked between the mounting antenna portion on which the wireless IC chip is mounted and the antenna main body portion on which the electrodes are arranged, and the wireless IC chip and the electrode Are arranged as separate members.
For this reason, when replacing the wireless IC chip with another wireless IC chip or changing the shape of the electrode by changing the required specifications, one of the components of the mounted antenna section and the antenna main body section is changed. That is enough, there is no need to change the other part.
Thus, for example, when a required specification is changed, parts that do not need to be changed can be diverted to a product with a new specification, and compatibility of the parts can be ensured.
本発明の第１実施形態に係る無線通信タグを示す分解斜視図である。FIG. 2 is an exploded perspective view showing the wireless communication tag according to the first embodiment of the present invention. 図１に示すアンテナ本体部におけるＸ－Ｘ断面図である。FIG. 2 is a sectional view taken along line XX of the antenna main body shown in FIG. 1. 図１に示す無線通信タグの動作を示す図であり、（ａ）アンテナ本体部が電磁波を捉えた状態を示している。（ｂ）電磁波の影響により、アンテナ本体部に電流が流れる状態を示している。（ｃ）アンテナ本体部に流れる電流により、搭載アンテナ部に電流が流れる状態を示している。（ｄ）無線ＩＣチップから情報を読み出す際に、搭載アンテナ部に電流が流れる状態を示している。（ｅ）無線ＩＣチップから情報を読み出す際に、アンテナ本体部から電磁波が発生する状態を示している。It is a figure which shows the operation | movement of the radio | wireless communication tag shown in FIG. 1, and shows the (a) antenna main body part in the state which caught the electromagnetic wave. (B) shows a state in which a current flows through the antenna body due to the influence of the electromagnetic wave. (C) shows a state in which a current flows through the mounted antenna unit due to a current flowing through the antenna body. (D) A state in which a current flows through the mounted antenna unit when information is read from the wireless IC chip. (E) A state in which an electromagnetic wave is generated from the antenna body when information is read from the wireless IC chip. 図１に示す無線通信タグにおいて、アンテナ本体部を取り替えた状態を示す模式図である。FIG. 2 is a schematic diagram illustrating a state where an antenna main body is replaced in the wireless communication tag illustrated in FIG. 1. 図１に示す無線通信タグの第１変形例を示す分解斜視図である。FIG. 4 is an exploded perspective view showing a first modification of the wireless communication tag shown in FIG. 1. 図１に示す無線通信タグの（ａ）第２変形例、（ｂ）第３変形例、（ｃ）第４変形例を示す模式図である。It is a schematic diagram which shows (a) 2nd modification, (b) 3rd modification, and (c) 4th modification of the wireless communication tag shown in FIG. 図１に示す無線通信タグの第５変形例を示す分解斜視図である。FIG. 13 is an exploded perspective view showing a fifth modification of the wireless communication tag shown in FIG. 1. 図７に示すアンテナ本体部におけるＹ－Ｙ断面図である。FIG. 8 is a sectional view taken along the line YY of the antenna main body shown in FIG. 7. 図１に示す無線通信タグの第６変形例を示す模式図である。FIG. 13 is a schematic diagram showing a sixth modification of the wireless communication tag shown in FIG. 1.
　次に、本発明の一実施形態に係る無線通信タグ１について、図面を参照して説明する。
　本実施形態に係る無線通信タグ１は、搭載している無線ＩＣチップ２と、外部の通信リーダ（図示せず）と、が無線通信を行うことにより、情報の授受を行う通信モジュールである。
　無線通信タグ１は、無線ＩＣチップ２と、無線ＩＣチップ２を保持する無線通信基板３と、を備えている。無線ＩＣチップ２としては、ＲＦＩＤシステムにおいて一般的に用いられるものとして、例えばＵＣＯＤＥ（登録商標）８チップ等を用いることができる。 Next, a wireless communication tag 1 according to an embodiment of the present invention will be described with reference to the drawings.
The wireless communication tag 1 according to the present embodiment is a communication module for exchanging information by performing wireless communication between a mounted wireless IC chip 2 and an external communication reader (not shown).
The wireless communication tag 1 includes a wireless IC chip 2 and a wireless communication board 3 holding the wireless IC chip 2. As the wireless IC chip 2, for example, a UCODE (registered trademark) 8 chip or the like can be used as generally used in an RFID system.
　図１に示すように、無線通信基板３は、無線ＩＣチップ２が搭載される搭載アンテナ部１０と、搭載アンテナ部１０に対して積層方向に配置されたアンテナ本体部１１と、搭載アンテナ部１０とアンテナ本体部１１との間に積層された絶縁性の第１スペーサ部１２と、を備えている。
　搭載アンテナ部１０、アンテナ本体部１１、および第１スペーサ部１２は、積層方向から見た平面視（以下、単に平面視という）で、矩形状を呈している。 As shown in FIG. 1, the wireless communication board 3 includes a mounting antenna section 10 on which the wireless IC chip 2 is mounted, an antenna main body section 11 arranged in the stacking direction with respect to the mounting antenna section 10, and a mounting antenna section 10. And an insulating first spacer portion 12 laminated between the antenna and the antenna main body portion 11.
The mounting antenna unit 10, the antenna main body unit 11, and the first spacer unit 12 have a rectangular shape in a plan view (hereinafter, simply referred to as a plan view) when viewed from the lamination direction.
　搭載アンテナ部１０は、導電性を備えた膜状をなしている。この実施形態では搭載アンテナ部１０として金属材料が採用されている。搭載アンテナ部１０は、積層方向から見た平面視（以下、上面視という）で全体として短辺と長辺とを備えた長方形状をなしている。 The mounted antenna unit 10 is in the form of a film having conductivity. In this embodiment, a metal material is employed for the mounting antenna unit 10. The mounted antenna unit 10 has a rectangular shape having short sides and long sides as a whole in a plan view (hereinafter, referred to as a top view) when viewed from the stacking direction.
　搭載アンテナ部１０は、厚み９μｍのアルミニウム膜と、厚み５０μｍのＰＥＴ樹脂膜と、により構成されている。アルミニウム膜は、接着剤によりＰＥＴ樹脂膜に接着されている。接着層の厚みは５μｍとなっている。
　なお、アルミニウム膜は他の金属材料に変更してもよいし、ＰＥＴ樹脂膜は他の樹脂材料に変更してもよい。また、それぞれの厚みも任意に変更可能である。 The mounted antenna unit 10 is composed of an aluminum film having a thickness of 9 μm and a PET resin film having a thickness of 50 μm. The aluminum film is bonded to the PET resin film with an adhesive. The thickness of the adhesive layer is 5 μm.
The aluminum film may be changed to another metal material, and the PET resin film may be changed to another resin material. Also, the thickness of each can be arbitrarily changed.
　搭載アンテナ部１０は、間隔をあけて配置された一対の翼部１０Ａを備えている。一対の翼部１０Ａは、上面視でアンテナ本体部１１の外縁部から突出しない範囲で矩形状をなし、互いに同等の大きさ、又は非対称な矩形の組み合わせをなしている。一対の翼部１０Ａは、長辺方向に間隔をあけて配置されている。翼部１０Ａは導電性を有し、実質的に外部と電気信号の授受を行うアンテナとして機能する。 The mounted antenna section 10 includes a pair of wing sections 10A arranged at an interval. The pair of wings 10A have a rectangular shape in a range that does not protrude from the outer edge of the antenna main body 11 in a top view, and have a size equal to each other or a combination of asymmetric rectangles. The pair of wing portions 10A are arranged at intervals in the long side direction. The wing portion 10A has conductivity and functions substantially as an antenna for transmitting and receiving electric signals to and from the outside.
　一対の翼部１０Ａの間に、無線ＩＣチップ２が配置され、翼部１０Ａと無線ＩＣチップ２とが電気的に接続されている。これにより、無線ＩＣチップ２は、一対の翼部１０Ａを電気的に接続している。
　上面視において、無線ＩＣチップ２は、搭載アンテナ部１０における短辺方向の一端部に配置されている。なお、搭載アンテナ部１０に対する無線ＩＣチップ２の位置は、任意に変更することができる。 The wireless IC chip 2 is disposed between the pair of wings 10A, and the wing 10A and the wireless IC chip 2 are electrically connected. Thereby, the wireless IC chip 2 electrically connects the pair of wings 10A.
When viewed from above, the wireless IC chip 2 is disposed at one end of the mounting antenna unit 10 in the short side direction. The position of the wireless IC chip 2 with respect to the mounting antenna unit 10 can be arbitrarily changed.
　上面視における翼部１０Ａの１辺の大きさＬ（ｍｍ）は、下記式（１）を満たしている。ここで、λは無線ＩＣチップ２が使用する電波の波長（ｍｍ）を指す。
　λ／１００≦Ｌ≦λ／１０…（１）
　なお、本実施形態では、無線ＩＣチップ２は周波数９２０ＭＨｚの電波を使用しているが、その他の周波数の電波を使用してもよい。図示の例では、無線ＩＣチップ２が使用する電波の波長λは、３２６ｍｍであり、翼部１０Ａの１辺の大きさＬは、２０ｍｍである。 The size L (mm) of one side of the wing portion 10A in a top view satisfies the following expression (1). Here, λ indicates the wavelength (mm) of the radio wave used by the wireless IC chip 2.
λ / 100 ≦ L ≦ λ / 10 (1)
In the present embodiment, the wireless IC chip 2 uses radio waves of a frequency of 920 MHz, but radio waves of other frequencies may be used. In the illustrated example, the wavelength λ of the radio wave used by the wireless IC chip 2 is 326 mm, and the size L of one side of the wing 10A is 20 mm.
　第１スペーサ部１２は、上面視で短辺と長辺とを備えた長方形状をなしている。第１スペーサ部１２の短辺の大きさは、搭載アンテナ部１０の短辺の大きさと同等となっている。第１スペーサ部１２の長辺の大きさは、搭載アンテナ部１０の長辺の大きさと同等となっている。
　なお、第１スペーサ部１２における短辺および長辺それぞれの大きさは、搭載アンテナ部１０における短辺および長辺それぞれの大きさよりも小さくてもよいし、大きくてもよい。 The first spacer portion 12 has a rectangular shape having a short side and a long side when viewed from above. The size of the short side of the first spacer section 12 is equal to the size of the short side of the mounting antenna section 10. The size of the long side of the first spacer section 12 is equal to the size of the long side of the mounting antenna section 10.
In addition, the size of each of the short side and the long side of the first spacer unit 12 may be smaller or larger than the size of each of the short side and the long side of the mounting antenna unit 10.
　第１スペーサ部１２の積層方向における厚みＴ（ｍｍ）は、下記式（２）を満たしている。ここで、λは無線ＩＣチップ２が使用する電波の波長（ｍｍ）を指す。
　λ／１００００≦Ｌ≦λ／１００…（２）
　図示の例では、無線ＩＣチップ２が使用する電波の波長λは、３２６ｍｍであり、第１スペーサ部１２の積層方向における厚みＴは、０．１５～０．２ｍｍである。 The thickness T (mm) of the first spacer portion 12 in the stacking direction satisfies the following expression (2). Here, λ indicates the wavelength (mm) of the radio wave used by the wireless IC chip 2.
λ / 10000 ≦ L ≦ λ / 100 (2)
In the illustrated example, the wavelength λ of the radio wave used by the wireless IC chip 2 is 326 mm, and the thickness T of the first spacer portion 12 in the stacking direction is 0.15 to 0.2 mm.
　図２に示すように、アンテナ本体部１１は、搭載アンテナ部１０の翼部１０Ａと電界結合がなされる電極１１Ａと、電極１１Ａを支持する基材１１Ｂと、を備えている。電極１１Ａおよび基材１１Ｂは、積層方向に並べて配置され、一体に形成されている。 As shown in FIG. 2, the antenna body 11 includes an electrode 11A that is electrically coupled to the wing 10A of the mounted antenna 10, and a base material 11B that supports the electrode 11A. The electrode 11A and the base material 11B are arranged side by side in the laminating direction and are integrally formed.
　図１に示すように、アンテナ本体部１１は、上面視で短辺と長辺とを備えた長方形状をなしている。
　アンテナ本体部１１の上面視における短辺の大きさは、第１スペーサ部１２の短辺の大きさと同等となっている。アンテナ本体部１１の上面視における長辺の大きさは、第１スペーサ部１２の長辺の大きさよりも大きくなっている。 As shown in FIG. 1, the antenna main body 11 has a rectangular shape having a short side and a long side when viewed from above.
The size of the short side of the antenna main body 11 as viewed from above is the same as the size of the short side of the first spacer 12. The size of the long side of the antenna body 11 as viewed from above is larger than the size of the long side of the first spacer 12.
　図１および図２に示すように、電極１１Ａは、その一部同士が積層方向に間隔をあけて対向するように折り曲げられている。
　図２に示すように、電極１１Ａおよび基材１１Ｂは、短辺に沿う短辺方向から見た正面視で、長辺に沿う長辺方向における中央部を除いて、その一部同士が積層方向に間隔をあけて対向するように折り曲げられている。 As shown in FIG. 1 and FIG. 2, the electrode 11A is bent such that a part thereof faces each other at intervals in the laminating direction.
As shown in FIG. 2, the electrodes 11A and the base material 11B are partially laminated in the stacking direction except for a central portion in the long side direction along the long side when viewed from the short side direction along the short side. Are bent so as to face each other at intervals.
　電極１１Ａ及び基材１１Ｂは、正面視において、短辺方向に開口するループ状に形成され、全域にわたって互いに接着されている。図示の通り、電極１１Ａが基材１１Ｂに対して正面視における外周側に配置されている。電極１１Ａは、無線ＩＣチップ２が使用する電波の周波数に対応する大きさとなっている。
　アンテナ本体部１１のうち、内周側に配置された基材１１Ｂにおいて、積層方向に互いに対向する部分同士の間には、隙間ＣＬが形成されている。隙間ＣＬの積層方向の大きさＣ１は、500～1000μｍ程度となっている。 The electrode 11A and the base material 11B are formed in a loop shape opened in the short side direction in a front view, and are adhered to each other over the entire area. As shown in the figure, the electrode 11A is arranged on the outer peripheral side of the base material 11B when viewed from the front. The electrode 11A has a size corresponding to the frequency of a radio wave used by the wireless IC chip 2.
A gap CL is formed between portions of the antenna body 11 that are opposed to each other in the stacking direction on the base material 11B arranged on the inner peripheral side. The size C1 of the gap CL in the stacking direction is about 500 to 1000 μm.
　電極１１Ａは厚み９μｍのアルミニウム膜により形成され、基材１１Ｂは、厚み５０μｍのＰＥＴ樹脂膜により形成されている。電極１１Ａと基材１１Ｂとを接着する接着層の厚みは５μｍとなっている。
　なお、アルミニウム膜は他の金属材料に変更してもよいし、ＰＥＴ樹脂膜は他の樹脂材料に変更してもよい。また、それぞれの厚みも任意に変更可能である。 The electrode 11A is formed of a 9 μm thick aluminum film, and the base material 11B is formed of a 50 μm thick PET resin film. The thickness of the adhesive layer for bonding the electrode 11A and the base material 11B is 5 μm.
The aluminum film may be changed to another metal material, and the PET resin film may be changed to another resin material. Also, the thickness of each can be arbitrarily changed.
　ループ状をなす電極１１Ａは、ループ状の一端部と他端部との間に形成されたスリット１１Ｃを備えている。
　図示の例では、アンテナ本体部１１のうち、積層方向における第１スペーサ部１２側（上側）に、短辺方向に延びるスリット１１Ｃが形成されている。スリット１１Ｃは、短辺方向の全域にわたって延びている。 The loop-shaped electrode 11A has a slit 11C formed between one end and the other end of the loop.
In the illustrated example, a slit 11C extending in the short side direction is formed on the first spacer portion 12 side (upper side) in the stacking direction in the antenna body portion 11. The slit 11C extends over the entire area in the short side direction.
　スリット１１Ｃは、電極１１Ａおよび基材１１Ｂそれぞれに一体に形成されている。スリット１１Ｃの長辺方向の大きさＬ１は、アンテナ本体部１１の長辺方向の大きさＬ２の１／５０～１／１００程度になっている。
　図１に示すように、スリット１１Ｃの上方に位置する部分に、無線ＩＣチップ２が配置されている。 The slit 11C is formed integrally with each of the electrode 11A and the base 11B. The size L1 of the slit 11C in the long side direction is about 1/50 to 1/100 of the size L2 of the antenna body 11 in the long side direction.
As shown in FIG. 1, the wireless IC chip 2 is disposed in a portion located above the slit 11C.
　アンテナ本体部１１には、複数の切り欠き部１１Ｄが形成されている。切り欠き部１１Ｄは、アンテナ本体部１１の上面から側面にかけて形成されている。切り欠き部１１Ｄは、電極１１Ａおよび基材１１Ｂの一部を一体に切り欠いている。 A plurality of cutouts 11D are formed in the antenna body 11. The notch 11D is formed from the upper surface to the side surface of the antenna main body 11. The notch 11D integrally cuts off the electrode 11A and a part of the base 11B.
　このように切り欠き部１１Ｄを形成することで、電極１１Ａにおいて、電流が流れる部分の経路長を、切り欠き部１１Ｄが形成されていない構成と比較して長くすることが可能になる。これにより、アンテナ本体部１１の投影面積を小さくしながら、使用する電磁波を低い周波数にすることができる。なお、切り欠き部１１Ｄの形状、大きさ、位置は、任意に変更することができる。 形成 By forming the cutout portion 11D in this way, it is possible to make the path length of the current flowing portion of the electrode 11A longer than the configuration in which the cutout portion 11D is not formed. Thereby, the electromagnetic wave to be used can be set to a low frequency while the projected area of the antenna main body 11 is reduced. Note that the shape, size, and position of the notch 11D can be arbitrarily changed.
　無線通信基板３は、アンテナ本体部１１を積層方向に挟む搭載アンテナ部１０の反対側に積層された導電性の反射材１３と、アンテナ本体部１１と反射材１３との間に積層された第２スペーサ部１４と、を備えている。
　反射材１３は金属材料により形成されている。反射材１３の上面視における大きさは、アンテナ本体部１１と同等となっている。反射材１３を配置することで、仮に金属面にこの無線通信基板３を貼付した際に、無線ＩＣチップ２の通信能力が大きく変化するのを抑えることができる。 The wireless communication board 3 includes a conductive reflective material 13 laminated on the opposite side of the mounting antenna unit 10 sandwiching the antenna main body 11 in the laminating direction, and a second reflective laminate between the antenna main body 11 and the reflective material 13. And two spacer portions 14.
The reflector 13 is formed of a metal material. The size of the reflector 13 in a top view is equivalent to that of the antenna body 11. By arranging the reflecting material 13, it is possible to suppress a large change in the communication capability of the wireless IC chip 2 when the wireless communication board 3 is temporarily attached to a metal surface.
　第２スペーサ部１４は、ＰＥＴ樹脂により形成され、絶縁性を備えている。第２スペーサ部１４の厚みは、第１スペーサ部１２の厚みと同等となっている。第２スペーサ部１４の上面視での大きさは、反射材１３と同等となっている。
　第２スペーサ部１４がアンテナ本体部１１と反射材１３との間に介在していることで、アンテナ本体部１１と反射材１３とが導通するのを抑えることができる。 The second spacer portion 14 is formed of PET resin and has an insulating property. The thickness of the second spacer section 14 is equal to the thickness of the first spacer section 12. The size of the second spacer portion 14 as viewed from above is the same as that of the reflective material 13.
Since the second spacer portion 14 is interposed between the antenna main body 11 and the reflector 13, conduction between the antenna main body 11 and the reflector 13 can be suppressed.
　次に、図３を用いて、無線通信タグ１の動作について説明する。なお、図３では、反射材１３および第２スペーサ部１４の図示を省略している。
　まず、図３（ａ）に示すように、通信リーダ（図示せず）から照射された電磁波をキャッチする。この際、電磁波により生じ、短辺方向に流れる磁界成分をアンテナ本体部１１がキャッチする。
　この点について詳述すると、ループ状をなすアンテナ本体部１１の内側に、電磁波が通過することで、アンテナ本体部１１の電極１１Ａに電磁誘導が生じる。これにより図３（ｂ）に示すように、電極１１Ａに電流が流れる。 Next, the operation of the wireless communication tag 1 will be described with reference to FIG. In FIG. 3, the illustration of the reflection material 13 and the second spacer portion 14 is omitted.
First, as shown in FIG. 3A, an electromagnetic wave emitted from a communication reader (not shown) is caught. At this time, the antenna main body 11 catches a magnetic field component generated by the electromagnetic wave and flowing in the short side direction.
To explain this point in detail, an electromagnetic wave passes through the inside of the loop-shaped antenna main body 11, so that electromagnetic induction occurs on the electrode 11 </ b> A of the antenna main body 11. Thus, as shown in FIG. 3B, a current flows through the electrode 11A.
　次に、電極１１Ａに流れた電流の影響により、電極１１Ａと電界結合された搭載アンテナ部１０の翼部１０Ａに逆起電力が生じる。
　これにより、図３（ｃ）に示すように、搭載アンテナ部１０に、無線ＩＣチップ２を介して電流が流れる。この電流により、無線ＩＣチップ２に電力が供給され、無線ＩＣチップ２が起動する。 Next, due to the effect of the current flowing through the electrode 11A, a back electromotive force is generated in the wing 10A of the mounted antenna unit 10 that is electrically coupled to the electrode 11A.
Thereby, as shown in FIG. 3C, a current flows through the mounting antenna unit 10 via the wireless IC chip 2. With this current, power is supplied to the wireless IC chip 2 and the wireless IC chip 2 is activated.
　無線ＩＣチップ２が起動すると、無線ＩＣチップ２は、内部に保有している情報を出力するために、電流を生成する。これにより、図３（ｄ）に示すように、起動時に搭載アンテナ部１０に流れた電流と逆向きの電流が流れる。
　この電流には、無線ＩＣチップ２が内部に保有している情報が含まれている。 When the wireless IC chip 2 is activated, the wireless IC chip 2 generates a current in order to output information held therein. As a result, as shown in FIG. 3D, a current flows in a direction opposite to the current flowing to the mounted antenna unit 10 at the time of startup.
This current includes information held inside the wireless IC chip 2.
　そして、この電流により、アンテナ本体部１１の電極１１Ａに逆起電力が生じ、電極１１Ａを電流が流れる。
　これにより、アンテナ本体部１１の内側に電磁波が生じ、外部に向かう磁界成分が形成される。このように生じた電磁波を、通信リーダが読み取ることで、無線ＩＣチップ２内の情報を通信リーダが読み取ることができる。 Then, due to this current, a back electromotive force is generated in the electrode 11A of the antenna body 11, and the current flows through the electrode 11A.
As a result, an electromagnetic wave is generated inside the antenna main body 11, and a magnetic field component directed to the outside is formed. The communication reader can read the information in the wireless IC chip 2 by reading the electromagnetic waves generated in this manner by the communication reader.
　以上説明したように、本実施形態に係る無線通信基板３によれば、無線ＩＣチップ２が搭載される搭載アンテナ部１０と、電極１１Ａが配置されたアンテナ本体部１１と、の間に、第１スペーサ部１２が積層され、無線ＩＣチップ２と電極１１Ａとが別部材としてそれぞれ配置されている。 As described above, according to the wireless communication board 3 according to the present embodiment, the first antenna unit 10 on which the wireless IC chip 2 is mounted and the antenna body 11 on which the electrode 11A is arranged are disposed One spacer section 12 is stacked, and the wireless IC chip 2 and the electrode 11A are arranged as separate members.
　このため、無線通信タグ１への要求仕様の変更により、無線ＩＣチップ２を他の無線ＩＣチップ２と交換したり、電極１１Ａの形状を変更したりする場合に、搭載アンテナ部１０およびアンテナ本体部１１のいずれか一方の部品を変更することで足り、他方の部品を変更する必要が無い。 For this reason, when the wireless IC chip 2 is replaced with another wireless IC chip 2 or the shape of the electrode 11A is changed due to a change in the required specifications for the wireless communication tag 1, the mounting antenna unit 10 and the antenna body It is sufficient to change one of the parts of the unit 11, and it is not necessary to change the other part.
　すなわち、図４に示すように、アンテナ本体部１１の大きさを変更することにより、アンテナ本体部１１がキャッチする電磁波の周波数帯域を自由に変更することができる。なお、図４では、反射材１３および第２スペーサ部１４の図示を省略している。
　これにより、要求仕様の変更に際して、変更を必要としない部品を新たな仕様の製品に転用することが可能になり、部品の互換性を確保することができる。 That is, as shown in FIG. 4, by changing the size of the antenna main body 11, the frequency band of the electromagnetic wave caught by the antenna main body 11 can be freely changed. In FIG. 4, the illustration of the reflection material 13 and the second spacer portion 14 is omitted.
As a result, when the required specifications are changed, parts that do not need to be changed can be diverted to products with new specifications, and compatibility of the parts can be ensured.
　また、電極１１Ａが、その一部同士が積層方向に間隔をあけて対向するように折り曲げられている。このため、例えば電極１１Ａが平板状に形成されているような構成と比較して、電極１１Ａにより囲まれた空間を形成することで、その内部を通過した電磁波により、電極１１Ａに電磁誘導を起こすことができる。
　これにより、これまでのＲＦＩＤシステムにおいて通信が不安定であった非金属物（人体や水分入り容器等の水分量の多いものを含む）であってもアンテナ出力を確保し、安定した通信を行うことができる。 The electrode 11A is bent so that a part thereof faces each other with an interval in the stacking direction. Therefore, by forming a space surrounded by the electrode 11A as compared with a configuration in which the electrode 11A is formed in a plate shape, for example, electromagnetic induction is caused in the electrode 11A by an electromagnetic wave passing through the inside. be able to.
As a result, the antenna output is ensured even for non-metallic objects (including those having a large amount of water such as a human body or a container containing water) whose communication has been unstable in the conventional RFID system, and stable communication is performed. be able to.
　また、アンテナ本体部１１が、上面視で長方形状をなし、電極１１Ａは、長辺方向における中央部を除いて、その一部同士が積層方向に間隔をあけて対向するように折り曲げられている。
　このため、例えば物体の表面にこの無線通信タグ１を貼付して使用した場合等に、この物体の表面に衝突して、表面に沿って短辺方向に流れる電磁波をアンテナ本体部１１の内側でキャッチすることが可能になり、効果的に通信の安定性を確保することができる。 Further, the antenna main body 11 has a rectangular shape in a top view, and the electrode 11A is bent such that a part thereof faces each other with a space therebetween in the laminating direction except for a central portion in a long side direction. .
Therefore, when the wireless communication tag 1 is attached to the surface of an object and used, for example, the electromagnetic wave colliding with the surface of the object and flowing in the short side direction along the surface is generated inside the antenna body 11. It becomes possible to catch, and communication stability can be effectively secured.
　また、搭載アンテナ部１０における一対の翼部１０Ａが、上面視で矩形状をなすとともに、その１辺の大きさＬが式（１）を満たしている。このため、搭載アンテナ部１０とアンテナ本体部１１との間に絶縁性の第１スペーサ部１２が積層されている構成であっても、無線ＩＣチップ２と電極１１Ａとの電気的な結合度を確保して、無線ＩＣチップ２と電極１１Ａとの間における電気的エネルギーの授受を確実に実現することができる。 {Circle around (1)} The pair of wings 10A of the mounted antenna 10 have a rectangular shape in a top view, and the size L of one side thereof satisfies Expression (1). Therefore, even when the insulating first spacer portion 12 is laminated between the mounting antenna portion 10 and the antenna body portion 11, the degree of electrical coupling between the wireless IC chip 2 and the electrode 11A is reduced. As a result, the transfer of electric energy between the wireless IC chip 2 and the electrode 11A can be reliably realized.
　また、第１スペーサ部１２の積層方向における厚みＴが、式（２）を満たしている。このため、搭載アンテナ部１０とアンテナ本体部１１との間に絶縁性の第１スペーサ部１２が積層されている構成であっても、無線ＩＣチップ２と電極１１Ａとの電気的な結合度を確保して、無線ＩＣチップ２と電極１１Ａとの間における電気的エネルギーの授受を確実に実現することができる。 厚 み The thickness T of the first spacer portion 12 in the stacking direction satisfies the expression (2). Therefore, even when the insulating first spacer portion 12 is laminated between the mounting antenna portion 10 and the antenna body portion 11, the degree of electrical coupling between the wireless IC chip 2 and the electrode 11A is reduced. As a result, the transfer of electric energy between the wireless IC chip 2 and the electrode 11A can be reliably realized.
　また、無線通信基板３が、導電性の反射材１３と、アンテナ本体部１１と反射材１３との間に積層された第２スペーサ部１４と、を備えている。このため、例えば反射材１３を備えていない構成と比較して、金属面に無線通信基板３を貼付された際に、無線ＩＣチップ２の通信能力が大きく変化するのを抑えることができる。これにより、無線ＩＣチップ２の通信能力の変動を抑え、無線通信基板３が貼付される面の材料を選ぶことなく、汎用性を確保することができる。 {Circle around (1)} The wireless communication board 3 includes the conductive reflector 13 and the second spacer 14 laminated between the antenna body 11 and the reflector 13. For this reason, when the wireless communication substrate 3 is attached to a metal surface, it is possible to suppress a large change in the communication capability of the wireless IC chip 2 as compared with, for example, a configuration in which the reflective material 13 is not provided. Thereby, the fluctuation of the communication capability of the wireless IC chip 2 can be suppressed, and the versatility can be secured without selecting the material of the surface to which the wireless communication substrate 3 is attached.
　また、短辺方向に開口したループ状をなす電極１１Ａが、短辺方向に流れる電磁波をターゲットとしている。
　このため、積層方向に流れる電磁波が、仮に反射材１３により反射された場合であっても、アンテナ出力が低減するのを抑えることができる。 In addition, the loop-shaped electrode 11A opened in the short side direction targets electromagnetic waves flowing in the short side direction.
For this reason, even if the electromagnetic waves flowing in the stacking direction are reflected by the reflector 13, it is possible to suppress a decrease in the antenna output.
（変形例）
　次に、図５から図９を用いて、無線通信タグ１の変形例について説明する。なお、図６および図９では、反射材１３および第２スペーサ部１４の図示を省略している。
　図５に示す第１変形例に係る無線通信基板３Ｂでは、アンテナ本体部２１において、側面にのみ切り欠き部２１Ｄが形成されている。なお、アンテナ本体部２１に切り欠き部を形成しなくてもよい。 (Modification)
Next, a modified example of the wireless communication tag 1 will be described with reference to FIGS. In FIGS. 6 and 9, the illustration of the reflector 13 and the second spacer portion 14 is omitted.
In a wireless communication board 3B according to a first modification shown in FIG. 5, a cutout 21D is formed only on the side surface of the antenna main body 21. Note that the notch may not be formed in the antenna main body 21.
　図６（ａ）に示す第２変形例に係る無線通信基板３Ｃでは、アンテナ本体部３１の電極３１Ａにおけるスリット３１Ｃの位置は、正面視における側面になっている。
　図６（ｂ）に示す第３変形例に係る無線通信基板３Ｄでは、アンテナ本体部４１におけるスリット４１Ｃの大きさが、第１実施形態と比較して大きくなっている。この無線通信基板３Ｄでは、スリット４１Ｃの長辺方向の大きさは、アンテナ本体部４１の長辺方向の大きさの７割程度になっている。 In the wireless communication board 3C according to the second modified example shown in FIG. 6A, the position of the slit 31C in the electrode 31A of the antenna main body 31 is a side surface in a front view.
In the wireless communication board 3D according to the third modification shown in FIG. 6B, the size of the slit 41C in the antenna main body 41 is larger than that in the first embodiment. In the wireless communication board 3D, the size of the slit 41C in the long side direction is about 70% of the size of the antenna body 41 in the long side direction.
　このように、電極におけるスリットの位置および大きさは、任意に変更することができる。すなわち、図６（ｃ）に示す第４変形例に係る無線通信基板３Ｅのように、長辺方向の大きさが、アンテナ本体部５１の大きさの７割程度のスリット５１Ｃを、正面視における下側に配置してもよい。 Thus, the position and size of the slit in the electrode can be arbitrarily changed. That is, like a wireless communication board 3E according to a fourth modification shown in FIG. 6C, a slit 51C whose size in the long side direction is about 70% of the size of the antenna main body 51 is formed in a front view. It may be arranged on the lower side.
　次に、図７および図８に示す第５変形例に係る無線通信基板３Ｆのように、アンテナ本体部６１は、長辺方向からみた側面視で、短辺方向における中央部を除いて、その一部同士が積層方向に間隔をあけて対向するように折り曲げられてもよい。図示の通り、電極６１Ａが基材６１Ｂに対して側面視における外周側に配置されている。 Next, as in a wireless communication board 3F according to a fifth modification example shown in FIGS. 7 and 8, the antenna main body 61 has a configuration other than the central portion in the short side direction when viewed from the side viewed from the long side direction. Some of them may be bent so as to face each other with an interval in the stacking direction. As illustrated, the electrode 61A is arranged on the outer peripheral side of the base material 61B in a side view.
　すなわち、図８に示すように、側面視において、長辺方向に開口するループ状に形成されている。図９に示すように、無線通信基板３Ｆにおける搭載アンテナ部１０Ｂでは、翼部１０Ｃが短辺方向に間隔をあけて配置されている。この場合、アンテナ本体部６１は、主に長辺方向に流れる電磁波をターゲットとすることになる。 That is, as shown in FIG. 8, in a side view, it is formed in a loop shape opened in the long side direction. As shown in FIG. 9, in the mounted antenna section 10B on the wireless communication board 3F, the wing sections 10C are arranged at intervals in the short side direction. In this case, the antenna main body 61 mainly targets an electromagnetic wave flowing in the long side direction.
　次に図９に示す第６変形例に係る無線通信基板３Ｇでは、２つのアンテナ本体部７１、７２が、搭載アンテナ部１０を積層方向に挟むように配置されている。
　アンテナ本体部７１、７２と搭載アンテナ部１０との間には、第１スペーサ部１２が各別に配置されている。２つのアンテナ本体部７１、７２は、長辺方向の大きさが互いに異なっている。
　このように互いに大きさの異なる２つのアンテナ本体部７１、７２を備えていることで、異なる周波数帯域の電磁波それぞれを用いた通信を行うことができる。 Next, in a wireless communication board 3G according to a sixth modification shown in FIG. 9, the two antenna main bodies 71 and 72 are arranged so as to sandwich the mounted antenna 10 in the stacking direction.
The first spacer portions 12 are separately arranged between the antenna body portions 71 and 72 and the mounted antenna portion 10. The two antenna main bodies 71 and 72 have different sizes in the long side direction.
By providing the two antenna main bodies 71 and 72 having different sizes from each other, communication using electromagnetic waves in different frequency bands can be performed.
　なお、上述の実施形態は、本発明の代表的な実施形態を単に例示したものにすぎない。したがって、本発明の趣旨を逸脱しない範囲において、上述の実施形態に対して種々の変形を行ってもよい。 The above embodiments are merely examples of typical embodiments of the present invention. Therefore, various modifications may be made to the above embodiment without departing from the spirit of the present invention.
　例えば、上記実施形態においては、上面視で矩形状をなす一対の翼部１０Ａにおける１辺の大きさが、式（１）を満たしている構成を示したが、このような態様に限られない。一対の一対の翼部１０Ａにおける１辺の大きさは、式（１）を満たさなくてもよいし、翼部１０Ａは上面視で、円形状や三角形状等の矩形状ではない形状であってもよい。 For example, in the above-described embodiment, a configuration is shown in which the size of one side of the pair of wing portions 10A having a rectangular shape in a top view satisfies Expression (1), but is not limited thereto. . The size of one side of the pair of wings 10A does not have to satisfy Expression (1), and the wing 10A has a non-rectangular shape such as a circular shape or a triangular shape in a top view. Is also good.
　また、上記実施形態においては、第１スペーサ部１２の積層方向における厚みＴが、式（２）を満たしている構成を示したが、このような態様に限られない。第１スペーサ部１２の積層方向における厚みＴは、式（２）を満たさなくてもよい。 Also, in the above-described embodiment, the configuration is described in which the thickness T of the first spacer portion 12 in the stacking direction satisfies the expression (2), but is not limited to such a mode. The thickness T of the first spacer portion 12 in the stacking direction does not have to satisfy the expression (2).
　また、上記実施形態においては、無線通信基板３が反射材１３と第２スペーサ部１４とを備えている構成を示したが、このような態様に限られない。無線通信基板３は、反射材１３と第２スペーサ部１４とを備えなくてもよい。 Also, in the above-described embodiment, the configuration in which the wireless communication board 3 includes the reflecting member 13 and the second spacer portion 14 has been described. However, the configuration is not limited to such an aspect. The wireless communication board 3 does not need to include the reflection member 13 and the second spacer portion 14.
　また、前述した変形例に限られず、これらの変形例を選択して適宜組み合わせてもよいし、その他の変形を施してもよい。 The present invention is not limited to the above-described modified examples, and these modified examples may be selected and appropriately combined, or may be modified in other ways.
　１　無線通信タグ
　２　無線ＩＣチップ
　３　無線通信基板
　１０　搭載アンテナ部
　１１　アンテナ本体部
　１１Ａ　電極
　１１Ｂ　基材
　１２　第１スペーサ部
　１３　反射材
　１４　第２スペーサ部 REFERENCE SIGNS LIST 1 wireless communication tag 2 wireless IC chip 3 wireless communication board 10 mounted antenna section 11 antenna body section 11A electrode 11B base material 12 first spacer section 13 reflector 14 second spacer section

Claims (7)

  1. 　無線ＩＣチップが搭載される導電性の搭載アンテナ部と、
    　前記搭載アンテナ部と電界結合がなされる電極が配置され、かつ前記搭載アンテナ部に対して積層方向に配置されたアンテナ本体部と、
    　前記搭載アンテナ部と前記アンテナ本体部との間に積層された絶縁性の第１スペーサ部と、を備えている無線通信基板。     A conductive mounting antenna unit on which a wireless IC chip is mounted;
    An electrode body in which an electrode to be subjected to electric field coupling with the mounting antenna unit is arranged, and an antenna main unit arranged in a stacking direction with respect to the mounting antenna unit,
    A wireless communication board comprising: an insulating first spacer portion laminated between the mounting antenna portion and the antenna body portion.
  2. 　前記アンテナ本体部は、前記電極と、前記電極を支持する基材と、を備え、
    　前記電極および前記基材は、積層方向に並べて配置され、
    　前記電極は、その一部同士が積層方向に間隔をあけて対向するように折り曲げられていることを特徴とする請求項１に記載の無線通信基板。     The antenna body includes the electrode and a substrate that supports the electrode,
    The electrode and the base material are arranged side by side in the lamination direction,
    The wireless communication board according to claim 1, wherein the electrode is bent such that a part thereof faces each other with an interval in a stacking direction.
  3. 　前記アンテナ本体部は、積層方向から見た平面視で長方形状をなし、
    　前記電極は、短辺に沿う短辺方向から見た平面視で、長辺に沿う長辺方向における中央部を除いて、その一部同士が積層方向に間隔をあけて対向するように折り曲げられていることを特徴とする請求項２に記載の無線通信基板。     The antenna body has a rectangular shape in plan view as viewed from the stacking direction,
    The electrode is bent so that a part thereof faces each other at intervals in the stacking direction, except for a central portion in the long side direction along the long side, in a plan view viewed from the short side direction along the short side. The wireless communication board according to claim 2, wherein:
  4. 　前記搭載アンテナ部は、間隔をあけて配置された一対の翼部を備え、
    　前記一対の翼部は、積層方向から見た平面視で矩形状をなし、１辺の大きさＬ（ｍｍ）は、下記式（１）を満たしていることを特徴とする請求項３に記載の無線通信基板。
    　λ／１００≦Ｌ≦λ／１０…（１）
    　λ：前記無線ＩＣチップが使用する電波の波長（ｍｍ）     The mounting antenna unit includes a pair of wings arranged at an interval,
    The pair of wing portions are formed in a rectangular shape in plan view as viewed from the laminating direction, and a size L (mm) of one side satisfies the following expression (1). Wireless communication board.
    λ / 100 ≦ L ≦ λ / 10 (1)
    λ: wavelength (mm) of a radio wave used by the wireless IC chip
  5. 　前記第１スペーサ部の積層方向における厚みＴ（ｍｍ）は、下記式（２）を満たしていることを特徴とする請求項４に記載の無線通信基板。
    　λ／１００００≦Ｌ≦λ／１００…（２）
    　λ：前記無線ＩＣチップが使用する電波の波長（ｍｍ）     The wireless communication board according to claim 4, wherein the thickness T (mm) of the first spacer portion in the stacking direction satisfies the following expression (2).
    λ / 10000 ≦ L ≦ λ / 100 (2)
    λ: wavelength (mm) of a radio wave used by the wireless IC chip
  6. 　前記アンテナ本体部を積層方向に挟む前記搭載アンテナ部の反対側に積層された導電性の反射材と、
    　前記アンテナ本体部と前記反射材との間に積層された絶縁性の第２スペーサ部と、を備えていることを特徴とする請求項３に記載の無線通信基板。     A conductive reflector laminated on the opposite side of the mounting antenna section sandwiching the antenna body in the laminating direction,
    4. The wireless communication board according to claim 3, further comprising: an insulating second spacer portion laminated between the antenna body and the reflector. 5.
  7. 　請求項１から６のいずれか１項に記載の無線通信基板と、
    　前記搭載アンテナ部に搭載された無線ＩＣチップと、を備えている無線通信タグ。     A wireless communication board according to any one of claims 1 to 6,
    And a wireless IC chip mounted on the mounting antenna unit.
PCT/JP2018/035232 2018-09-21 2018-09-21 Wireless communication substrate and wireless communication tag WO2020059154A1 (en)

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WO2018123432A1 (en) * 2016-12-30 2018-07-05 株式会社フェニックスソリューション Booster antenna, communication ic unit equipped with booster antenna, and communication ic unit equipped with booster antenna having attached conductor

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JP2008123222A (en) * 2006-11-10 2008-05-29 Hitachi Ltd Rfic tag and its using method
JP2009135867A (en) * 2007-03-30 2009-06-18 Nitta Ind Corp Wireless communication improving sheet body, wireless ic tag, antenna, and wireless communication system using the same
JP2011250406A (en) * 2010-05-28 2011-12-08 China Steel Corp Rfid tag having capacitive load
JP2014021705A (en) * 2012-07-18 2014-02-03 Toppan Forms Co Ltd Non-contact communication medium
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