JPWO2018147124A1 - Articles with RFID tags - Google Patents

Abstract

An article with an RFID tag includes an article at least partially comprising an insulating portion made of an insulating material, a UHF band RFID tag 12 having a coiled antenna 18 embedded in the insulating portion of the article, and an article attached to the RFID tag. The auxiliary antenna 20 includes a coupling portion 20a that can be attached and is magnetically coupled to the coiled antenna 18, and a radiating portion 20b that is connected to the coupling portion 20a.

Description

  The present invention relates to an article with an RFID (Radio-Frequency IDentification) tag.

  Conventionally, there are articles with RFID tags attached. For example, Patent Document 1 discloses spectacles incorporating an RFID tag for authenticity determination.

JP 2007-11013 A

  However, in the case of the spectacles of Patent Document 1, the RFID tag is limited to a small one because it is incorporated so as not to impair the design of the spectacles. Therefore, the communicable distance of the RFID tag is short. That is, for example, the communication distance is not long enough that a single reader / writer device can read the RFID tags of a plurality of glasses at once.

  Therefore, an object of the present invention is to realize a sufficiently long communicable distance of an RFID tag in an article with an RFID tag without impairing the design of the article.

In order to solve the above technical problem, according to one aspect of the present invention,
An article comprising at least part of an insulating part made from an insulating material;
UHF band RFID tag buried in the insulating portion of the article with a coiled antenna,
An auxiliary antenna that is detachably attached to the article and includes a coupling portion that is magnetically coupled to the coiled antenna and a radiating portion connected to the coupling portion;
An RFID tagged article is provided.

  According to the present invention, a sufficiently long RFID tag communicable distance can be realized in an article with an RFID tag without impairing the design of the article.

The perspective view of the spectacles which are the articles | goods which concern on one embodiment of this invention Top view of RFID tag buried in glasses Equivalent circuit diagram of RFID tag Perspective view of seal sheet holding auxiliary antenna Exploded perspective view of seal sheet The figure which shows the seal sheet of the state where it is arranged opposite to the RFID tag The perspective view which shows the nose pad of the spectacles with which the RFID tag was buried The figure which shows the state where the auxiliary antenna was attached to the nose pad The figure which shows an example of the sheet | seat which hold | maintains an auxiliary antenna based on another embodiment The figure which shows another example of the sheet | seat which hold | maintains an auxiliary antenna based on another embodiment The figure which shows an example of the auxiliary antenna which concerns on different embodiment The figure which shows another example of the auxiliary antenna which concerns on different embodiment Furthermore, the figure which shows the auxiliary antenna which concerns on different embodiment Furthermore, the figure which shows the sealing sheet holding the auxiliary antenna which concerns on another different embodiment The figure which shows the seal sheet which hold | maintains the auxiliary antenna arrange | positioned facing the RFID tag in the state shifted | deviated The figure which shows the seal sheet which hold | maintains the auxiliary | assistant antenna arrange | positioned facing the RFID tag in the state further shifted | deviated The figure which shows the outsole of the shoes which are articles | goods which concern on another embodiment of this invention.

  An RFID tag-attached article of one embodiment of the present invention includes an article that is at least partially provided with an insulating portion made of an insulating material, a UHF band RFID tag that is provided with a coiled antenna and is embedded in the insulating portion of the article, And an auxiliary antenna that is detachably attached to the article and includes a coupling portion that is magnetically coupled to the coiled antenna and a radiation portion that is connected to the coupling portion.

  According to this aspect, it is possible to realize a sufficiently long communicable distance of the RFID tag in an article with an RFID tag without impairing the design of the article.

  For example, an article with an RFID tag has a sheet for holding the auxiliary antenna, and the sheet is detachably attached to the article so that the coiled antenna and the coupling portion of the auxiliary antenna are magnetically coupled. Also good.

  For example, the sheet may include an adhesive layer that releasably adheres to the article.

  For example, the sheet may include a hook portion or a hoop portion that can be hooked on the article.

  The coupling portion of the auxiliary antenna is a loop-shaped conductor, and the sheet is attached to the article so as to face the RFID tag in the coil axis direction of the coil-shaped antenna, and the loop is viewed in the facing direction. The coiled antenna may be positioned in the conductor. As a result, the coupling portion of the auxiliary antenna and the coiled antenna are more strongly magnetically coupled, and as a result, the communicable distance of the RFID tag is further extended.

  The auxiliary antenna may have a coupling portion made up of a plurality of linear conductors extending in the same direction independently of each other. Thus, even if the auxiliary antenna is attached with a deviation from the RFID tag, the RFID tag can be magnetically coupled to any one of the plurality of linear conductors.

  Preferably, in the plurality of linear conductors, adjacent linear conductors have different electrical lengths. As a result, even if the RFID tag is arranged at an intermediate position between adjacent linear conductors and the coiled antenna is magnetically coupled to these linear conductors, good communication can be performed. That is, the influence of the radio wave radiated from the other linear conductor on the radio wave radiated from the one linear conductor coupled with the magnetic field is suppressed.

  The coupling portion of the auxiliary antenna may be constituted by a conductor provided along the opening of the hook portion or the hoop portion of the seat.

  The coupling portion of the auxiliary antenna may be formed of a loop-shaped conductor or a C-shaped conductor that can be hooked on the article.

  The article may be spectacles, and the RFID tag may be embedded in a temple or nose pad of the spectacles.

  The article may be a shoe outsole.

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

  FIG. 1 shows spectacles as an article with an RFID (Radio-Frequency IDentification) tag according to an embodiment of the present invention.

  In the glasses 10 of the present embodiment, the frame 10a, the temple 10b, and the nose pad 10c are made of an insulating material such as a resin material.

  The glasses 10 include an RFID tag 12. In the case of the present embodiment, the RFID tag 12 is buried in the left temple 10b so that it cannot be visually recognized.

  FIG. 2 is a top view of the RFID tag 12, and FIG. 3 shows an equivalent circuit of the RFID tag 12.

  As shown in FIG. 2, the RFID tag 12 is an ultra-small RFID tag having a magnetic field radiation antenna, and includes a substrate 14, an RFIC (Radio-Frequency Integrated Circuit) element 16 mounted on the substrate 14, A coiled antenna 18 formed in a spiral pattern and connected to the RFIC element 16 is provided on the substrate 14. In the case of the present embodiment, a coiled antenna 18 is provided so as to surround the RFIC element 16. As shown in FIG. 3, the RFID tag 12 also includes a parallel resonant circuit in which a capacitance C and an inductance L are arranged in parallel in order to communicate at a UHF band communication frequency. In the case of the present embodiment, the communicable distance of the RFID tag 12 that communicates at the UHF band communication frequency is, for example, in the range from several mm to about 10 mm. Note that the substrate may be a multilayer substrate in which a plurality of insulating layers are stacked, and a coiled antenna formed in a helical pattern may be provided therein.

  The RFIC element 16 incorporates a memory (not shown), and ID information unique to the RFID element 16 is stored in the memory. Information in the memory is read by a reader / writer device (not shown), and the authenticity of the glasses 10 is determined based on the read information.

  As described above, the communicable distance of the RFID tag 12 is short. Therefore, it takes time to manage the inventory check of the plurality of glasses 10 using the RFID tags 12 of the plurality of glasses 10.

  For example, when checking the inventory of a plurality of glasses 10 housed in a display case, the RFID tags 12 of each of the plurality of glasses 10 cannot be read at a time, so it is necessary to read them one by one while moving the reader / writer device. There is. Therefore, as the number of glasses 10 to be managed increases, it takes time to read all the RFID tags 12, and as a result, the time required for management such as inventory check becomes longer.

  As a countermeasure, that is, the spectacles 10 include an auxiliary antenna for extending the communicable distance of the RFID tag 12 so that the reader / writer device can read the plurality of RFID tags 12 at once.

  In the case of the present embodiment, as shown in FIGS. 4 and 5, the auxiliary antenna 20 is held by a seal sheet 22. As shown in FIG. 1, when the seal sheet 22 is detachably attached to the temple 10 b of the glasses 10, the glasses 10 include an auxiliary antenna 20 that can be removed.

  As shown in FIG. 5, in the case of the present embodiment, the seal sheet 22 has a rectangular and three-layer structure, and the base sheet 24 in which the auxiliary antenna 20 is formed as a conductor pattern on the surface 24a, and the auxiliary antenna The cover sheet 26 covers and protects 20 and the adhesive layer 28 provided on the back surface 24 b of the base sheet 24. With such a three-layer structure, the auxiliary antenna 20 is held by the seal sheet 22 in a state where it cannot be visually recognized.

  On the cover sheet 26, for example, the brand mark, product name, price, barcode, etc. of the glasses 10 are printed. Through the adhesive layer 28, the seal sheet 22 is detachably attached to the temple 12b of the glasses 10 so as to face the RFID tag 12 embedded in the temple 10b.

  As shown in FIG. 4, the auxiliary antenna 20 includes a magnetic field radiation type loop conductor (joint) 20 a and a field radiation type meander extending from the loop conductor 20 a in the longitudinal direction of the seal sheet 22. And a conductor portion (radiating portion) 20b.

  FIG. 6 shows a state in which the seal sheet 22 is attached to the temple 10 b of the eyeglass 10, that is, a state in which the seal sheet 22 is disposed to face the RFID tag 12.

  Specifically, as shown in FIG. 6, the seal sheet 22 is affixed to the temple 10 b of the glasses 10 so as to face the RFID tag 12 in the coil axis direction (direction orthogonal to the drawing) of the coiled antenna 18. Preferably, the seal sheet 22 is affixed to the temple 10b of the glasses 10 so that the coiled antenna 18 of the RFID tag 12 is positioned in the looped conductor portion 20a of the auxiliary antenna 20 when viewed in the opposite direction. Thereby, the loop-shaped conductor part 20a is arrange | positioned along the outer peripheral side part of the coil-shaped antenna 18 which a stronger magnetic field generate | occur | produces. Thus, when the auxiliary antenna 20 is close to the coiled antenna 18, the looped conductor portion 20 a of the auxiliary antenna 20 functions as a coupling portion that magnetically couples with the coiled antenna 18 of the RFID tag 12.

  To explain, the meandering conductor portion 20b of the auxiliary antenna 20 functions as a radiating portion and receives radio waves from the reader / writer device. A current flows from the meandering conductor 20b to the looping conductor 20a, and the looping conductor 20a generates a magnetic field around it. The magnetic field causes an induced current to flow in the coiled antenna 18, and the RFIC element 16 of the RFID tag 12 is driven by the current.

  When the RFID element 16 is driven, a signal (current) corresponding to information flows from the RFID element 16 to the coiled antenna 18, and the coiled antenna 18 generates a magnetic field therearound. The magnetic field causes an induced current to flow in the loop-shaped conductor portion 20a of the auxiliary antenna 20, and radio waves are radiated from the meander-shaped conductor portion 20b by the current.

  With such an auxiliary antenna 20, the RFID tag 12 can perform wireless communication at a distance that exceeds a single communicable distance. In the case of the present embodiment, by using the auxiliary antenna 20, the communicable distance of the RFID tag 12 is extended to, for example, 30 cm to 40 cm. Thereby, the reader / writer device can collectively read the RFID tags 12 of the plurality of glasses 10. As a result, management such as inventory check of the plurality of glasses 10 can be performed in a short time. In order to increase the communicable distance, it is preferable that the electrical length of the auxiliary antenna is equivalent to λ / 2 (λ: wavelength of the communication signal).

  In addition, the auxiliary antenna 20 (the seal sheet 22 that holds the auxiliary antenna 20) is removable from the glasses 10 (can be peeled off). For example, the auxiliary antenna 20 can be removed from the glasses 10 when handed over to the purchaser. The RFID tag 12 is buried in the temple 10 b of the glasses 10. Therefore, the design of the glasses 10 is not impaired by the auxiliary antenna 20 or the RFID tag 12 when the glasses 10 are used.

  According to the present embodiment as described above, in the glasses 10 with the RFID tag 12, a sufficiently long communicable distance of the RFID tag 12 can be realized without impairing the design of the glasses 10.

  The present invention has been described with reference to the above-described embodiment. However, the embodiment of the present invention is not limited to this, and various forms are possible.

  For example, in another embodiment, the RFID tag 12 is provided on a nose pad, not on a temple of glasses.

  FIG. 7 shows a nose pad of glasses in which an RFID tag is embedded.

  As shown in FIG. 7, the nose pad 50 is made of an insulating material such as a resin material, and is attached to the frame 54 via a pad arm (clings) 52. The RFID tag 12 is buried in the nose pad 50. When the nose pad 50 is transparent, the RFID tag is hidden, for example, a logo sheet and the nose pad 50 are embedded.

  In this case, as shown in FIG. 8, a seal sheet 62 that holds the auxiliary antenna 60 is attached to the nose pad 50. Specifically, the coiled antenna 18 of the RFID tag 12 is positioned in the substantially looped looped conductor portion 60a of the auxiliary antenna 60 as viewed in the coil axis direction of the coiled antenna 18 (viewed in the direction orthogonal to the drawing). The seal sheet 62 is attached to the nose pad 50. Thereby, the loop-shaped conductor part 60a functions as a coupling part that magnetically couples with the coiled antenna 18 of the RFID tag 12. As shown in FIG. 8, a part of the seal sheet 62 is attached to the nose pad 50 instead of the whole.

  Note that the auxiliary antenna can be attached to the article by a method other than pasting.

  For example, in yet another embodiment, the auxiliary antenna comprises a hook or hoop that is held on a sheet that can be hooked to a portion of the article, for example, a pad arm 52 of an eyeglass.

  9 and 10 show a sheet holding an auxiliary antenna that can be hooked on an article.

  The sheet 72 that holds the auxiliary antenna 70 shown in FIG. 9 includes a generally C-shaped hook portion 72b that is manufactured by forming a cutout portion 72a. The sheet 72 is hooked on the pad arm 52 so that the pad arm 52 shown in FIG. 7 passes through the hook opening 72c of the hook portion 72b.

  As shown in FIG. 9, the auxiliary antenna 70 extends from the C-shaped conductor portion 70a provided along the hook opening 72c of the hook portion 72b of the seat 72, and one end of the C-shaped conductor portion 70a. And a meandering conductor portion 70b. When the sheet 72 is hooked on the pad arm 52 via the hook portion 72b, the coiled antenna 18 of the RFID tag 12 is disposed in the C-shaped conductor portion 70a of the auxiliary antenna 70 as viewed in the coil axial direction of the coiled antenna 18. Is done. Thereby, the C-shaped conductor part 70 a functions as a coupling part that magnetically couples with the coiled antenna 18.

  The sheet 82 holding the auxiliary antenna 80 shown in FIG. 10 includes a through-hole-shaped hoop portion 82a. The sheet 82 is hooked on the pad arm 52 so that the pad arm 52 shown in FIG.

  As shown in FIG. 10, the auxiliary antenna 80 includes a substantially loop-shaped loop-shaped conductor portion 80a provided along the opening of the through-hole-shaped hoop portion 82a of the sheet 82, and both ends of the loop-shaped conductor portion 80a. And a meandering conductor portion 80b extending in the same direction. When the sheet 82 is hooked on the pad arm 52 through the hoop portion 82a, the coiled antenna 18 of the RFID tag 12 is disposed in the looped conductor portion 80a of the auxiliary antenna 80 as viewed in the coil axial direction of the coiled antenna 18. The Thereby, the loop-shaped conductor portion 80a functions as a coupling portion that magnetically couples with the coiled antenna 18.

  Note that the auxiliary antenna is not indirectly attached to the article via the seat, but can be directly attached to the article.

  In a different embodiment, the auxiliary antenna comprises a hook or hoop that can be hooked to a pad arm 52 of an article, for example glasses.

  11 and 12 show an auxiliary antenna that can be hooked on an article.

  As shown in FIG. 11, the auxiliary antenna 90 is made of a metal wire such as a wire having high rigidity against deformation such as bending or bending. The auxiliary antenna 90 includes a C-shaped conductor portion 90a and a meander-shaped conductor portion 90b extending from one end of the C-shaped conductor portion 90a.

  The C-shaped conductor portion 90a of the auxiliary antenna 90 functions as a hook portion that can be hooked on an article. Further, for example, when hooked on the pad arm 52 shown in FIG. 7, the magnetic coupling is performed with the coiled antenna 18 of the RFID tag 12 embedded in the nose pad 50. That is, the C-shaped conductor portion 90 a that functions as a coupling portion of the auxiliary antenna 90 that is magnetically coupled to the coiled antenna 18 also functions as a hook portion that is hooked on an article portion near the RFID tag 12.

  As shown in FIG. 11, the meandering conductor portion 90 b of the auxiliary antenna 90 is disposed in the sheet 92. For example, the sheet 92 is printed with the brand mark, product name, price, barcode, and the like of the article.

Similarly, the auxiliary antenna 100 shown in FIG. 12 is also made of a metal wire such as a wire having high rigidity against deformation such as bending or bending. In addition, the auxiliary antenna 100 includes a substantially loop-shaped loop-shaped conductor portion 100a and meander-shaped conductor portions 100b extending in the same direction from both ends of the loop-shaped conductor portion 100a.

  The loop-shaped conductor portion 100a of the auxiliary antenna 100 functions as a hoop portion that can be hooked on an article. Further, for example, when hooked on the pad arm 52 shown in FIG. 7, the magnetic coupling is performed with the coiled antenna 18 of the RFID tag 12 embedded in the nose pad 50. That is, the loop-shaped conductor portion 100 a that functions as a coupling portion of the auxiliary antenna 100 that is magnetically coupled to the coiled antenna 18 also functions as a hoop portion that is caught by an article portion near the RFID tag 12.

  As shown in FIG. 12, the two meandering conductor portions 100 b of the auxiliary antenna 100 are arranged in the sheet 102. For example, the sheet 102 is printed with a brand mark, product name, price, barcode, and the like of the article.

  Further, unlike the embodiments described so far, the auxiliary antenna may be an endless antenna, that is, a loop antenna.

  FIG. 13 shows an auxiliary antenna according to still another embodiment.

  As shown in FIG. 13, the auxiliary antenna 110 is magnetically coupled to the coiled antenna 18 of the RFID tag 12 and functions as a hoop that is hooked on an article, and both ends of the C-shaped conductor 110a. And a U-shaped conductor portion 110b having two ends connected to each other. Further, the U-shaped conductor portion 110 b is disposed in the sheet 112.

  The auxiliary antennas 90, 100, and 110 shown in FIGS. 11 to 13 can be hooked on an article (for example, the pad arm 52 shown in FIG. 7), that is, can be directly attached to the article. Therefore, the sheets 92, 102, and 112 can be omitted if unnecessary.

  Furthermore, unlike the embodiments described so far, the auxiliary antenna can be composed of a plurality of conductors.

  FIG. 14 shows an auxiliary antenna according to still another embodiment.

  As shown in FIG. 14, the auxiliary antenna 120 includes a plurality of linear conductors 120 </ b> A, 120 </ b> B, and 120 </ b> C that are held by the seal sheet 122 and extend in the same direction independently of each other. In the case of the embodiment shown in FIG. 14, the reason will be described later, but a plurality of linear conductors 120A, 120B, and 120C are arranged at a pitch P larger than the outer diameter of the coiled antenna 18 of the RFID tag 12. Yes. Although the reason will be described later, the adjacent linear conductors 120A and 120B have different electrical lengths, and the adjacent linear conductors 120A and 120C have different electrical lengths. In the embodiment shown in FIG. 14, the linear conductors 120B and 120C have the same electrical length. The upper limit of the pitch P is determined by the generated voltage of the RFIC element 16 of the RFID tag 12, that is, the magnetic field strength generated from the coiled antenna 18 (If the linear conductor and the coiled antenna 18 are too far apart, the magnetic field strength is insufficient. Magnetic field coupling is not possible.

  The advantage of the auxiliary antenna 120 shown in FIG. 14 is that strict alignment of the auxiliary antenna 120 (the seal sheet 122) with respect to the RFID tag 12 is not necessary. That is, even if there is a variation in the alignment of the auxiliary antenna 120 with respect to the RFID tag 12, the auxiliary antenna 120 can play a role of extending the communicable distance of the RFID tag 12.

  FIG. 15A shows the seal sheet 122 disposed so as to face the RFID tag 12 in a shifted state.

  As shown in FIG. 15A, the RFID tag 12 faces the inner linear conductor 120 </ b> A and is offset from the center of the seal sheet 122. That is, the RFID tag 12 is offset to the linear conductor 120C side of the auxiliary antenna 120. In this case, the portion of the linear conductor 120C closer to the outer peripheral side portion of the coiled antenna 18 where a strong magnetic field is generated functions as a coupling portion, and the linear conductor 120C is more strongly magnetically coupled than the other linear conductors 120A and 120B. To do. Then, both end portions of the linear conductor 120C function as a radiating portion that radiates radio waves. That is, the RFID tag 12 performs wireless communication with the reader / writer device mainly through the linear conductor 120C.

  FIG. 15B shows the seal sheet 122 arranged to face the RFID tag 12 in a further shifted state.

  As shown in FIG. 15B, the RFID tag 12 is offset from the center of the seal sheet 122 and faces the portion of the seal sheet 122 between the inner linear conductor 120A and the outer linear conductor 120C. In this case, the portion of the inner linear conductor 120A closer to the outer peripheral portion of the coiled antenna 18 functions as a coupling portion, and the inner linear conductor 120A is magnetically coupled to the magnetic field stronger than the outer linear conductor 120C. Then, both end portions of the linear conductor 120A function as a radiating portion that radiates radio waves. That is, the RFID tag 12 performs wireless communication with the reader / writer device mainly through the linear conductor 120A.

  As shown in FIG. 15B, when the distance between the adjacent linear conductors 120A and 120C and the distance from the outer peripheral side portion of the coiled antenna 18 to the linear conductors 120A and 120C are equal, the coiled antenna 18 is It can be magnetically coupled to both linear conductors 120A, 120C. In this case, radio waves generated from the linear conductors 120A and 120C may affect each other, and adversely affect the communication characteristics of the RFID tag 12. As a countermeasure, the adjacent linear conductors 120A and 120C have different electrical lengths.

  Further, the number of linear conductors in the auxiliary antenna is not limited to three, but may be two or four or more. Further, the plurality of linear conductors in the auxiliary antenna are not limited to a straight line, but may be a curve, a meander shape, or the like. The plurality of linear conductors may not be parallel to each other. Further, the linear conductors do not have to have the same thickness throughout, for example, the end portions may be thicker than other portions. In a broad sense, when the sheet is disposed to face the RFID tag, it is sufficient that there is at least one linear conductor at a distance capable of magnetic field coupling from the outer peripheral side portion of the coiled antenna of the RFID tag. That is, the coupling portion that magnetically couples with the coiled antenna 18 in the auxiliary antenna is composed of a plurality of linear conductors. And the radiation | emission part is comprised from a part of linear conductor couple | bonded with the magnetic field.

  In addition, although the article according to the embodiment described so far is glasses, the embodiment of the present invention is not limited to this.

  For example, FIG. 16 shows a shoe outsole with an RFID tag embedded therein.

  As shown in FIG. 16, the outsole 210 is made of an insulating rubber material. An RFID tag 12 is buried in the center of the outsole. A seal sheet 22 that holds the auxiliary antenna 20 is detachably attached so as to face the RFID tag 12.

  Similar to the above-described glasses 10, it is possible to determine the authenticity of the outsole 210 (or shoes equipped with the same) using the RFID tag 12. Further, the reader / writer device can collectively read the RFID tags 12 of the plurality of outsole 210 (or shoes including the same) through the auxiliary antenna 20.

  That is, the article of the embodiment according to the present invention broadly includes an article provided at least partially with an insulating portion made of an insulating material, and a UHF embedded in the insulating portion of the article with a coiled antenna. An RFID tag-attached article comprising: a band RFID tag; and an auxiliary antenna that is detachably attached to the article and includes a coupling portion that magnetically couples to the coiled antenna and a radiating portion connected to the coupling portion. is there.

  Although the present invention has been described with reference to a plurality of embodiments, at least one embodiment as a whole or a partial combination with respect to a certain embodiment is used as a further embodiment according to the present invention. It will be apparent to those skilled in the art that this is possible.

  The present invention is applicable to an article whose authenticity is determined using an RFID tag.

12 RFID tag 18 Coiled antenna 20 Auxiliary antenna 20a Coupling part 20b Radiation part

Claims (11)

An article comprising at least part of an insulating part made from an insulating material;
UHF band RFID tag buried in the insulating portion of the article with a coiled antenna,
An auxiliary antenna that is detachably attached to the article and includes a coupling portion that is magnetically coupled to the coiled antenna and a radiating portion connected to the coupling portion;
Article with RFID tag. A sheet holding the auxiliary antenna;
The article with an RFID tag according to claim 1, wherein the sheet is detachably attached to the article such that the coiled antenna and the coupling portion of the auxiliary antenna are magnetically coupled.   The RFID-tagged article according to claim 2, wherein the sheet includes an adhesive layer that releasably adheres to the article.   The RFID-tagged article according to claim 2, wherein the sheet includes a hook part or a hoop part that can be hooked on the article. The coupling portion of the auxiliary antenna is a loop conductor,
The sheet is attached to the article so as to face the RFID tag in a coil axis direction of the coiled antenna, and the coiled antenna is located in the looped conductor when viewed in the facing direction. The article with an RFID tag according to any one of 2 to 4.   The RFID tag-attached article according to any one of claims 2 to 4, wherein the auxiliary antenna has a coupling portion formed of a plurality of linear conductors that are independent from each other and extend in the same direction. .   The article with an RFID tag according to claim 6, wherein in the plurality of linear conductors, electrical lengths of adjacent linear conductors are different.   The RFID tag-attached article according to claim 4, wherein the coupling portion of the auxiliary antenna is constituted by a conductor provided along an opening of the hook portion or the hoop portion of the sheet.   The article with an RFID tag according to claim 1, wherein the coupling portion of the auxiliary antenna is configured by a loop-shaped conductor or a C-shaped conductor that can be hooked on the article. The article is glasses;
The RFID-tagged article according to any one of claims 1 to 9, wherein the RFID tag is buried in a temple or a nose pad of the glasses.   The RFID-tagged article according to any one of claims 1 to 9, wherein the article is a shoe outsole.

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