JP5684520B2 - RF-ID Media - Google Patents

RF-ID Media Download PDF

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JP5684520B2
JP5684520B2 JP2010211104A JP2010211104A JP5684520B2 JP 5684520 B2 JP5684520 B2 JP 5684520B2 JP 2010211104 A JP2010211104 A JP 2010211104A JP 2010211104 A JP2010211104 A JP 2010211104A JP 5684520 B2 JP5684520 B2 JP 5684520B2
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antenna
shown
inlet
portions
rf
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JP2012070076A (en
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石橋 秀則
秀則 石橋
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トッパン・フォームズ株式会社
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Description

  The present invention relates to an RF-ID medium having an antenna through which a current flows by electromagnetic waves from the outside, and more particularly to an RF-ID medium having a booster antenna for securing a communication distance.

  In recent years, with the progress of the information society, information is recorded on a card, and information management and settlement using the card are performed. Information is recorded on a label or tag attached to a product or the like, and the product or the like is managed using the label or tag. In information management using such a card, label, or tag, a contactless IC chip on which information can be written to or read from the card, label, or tag without contact is mounted. IC cards, non-contact type IC labels, or non-contact type IC tags are rapidly spreading due to their excellent convenience.

  RF-ID media such as a non-contact type IC card, a non-contact type IC label, or a non-contact type IC tag is formed such that a conductive antenna is formed on a base substrate and is connected to the antenna. An inlet on which an IC chip is mounted is sandwiched between a surface sheet and a card substrate.

  In recent years, a technique for extending a communication distance using a booster antenna has been considered, and disclosed in, for example, Patent Documents 1 and 2. The booster antenna generates electromagnetic induction with the inlet antenna and the antenna built in the IC chip as described above, thereby causing a current to flow through the antenna built into the inlet antenna and the IC chip. Information is written to or read from the IC chip. For example, the IC chip is arranged so as to surround a downsized inlet. When a current flows through the booster antenna due to an electromagnetic wave from the outside, the current flows through the antenna of the inlet antenna or the IC chip due to the current flowing through the booster antenna, and information is written to or read from the IC chip. It will be.

Japanese Patent No. 4462388 JP 2001-351083 A

  As described above, in an RF-ID medium using a booster antenna, a current flows through an antenna built into an inlet antenna or an IC chip due to a current flowing through the booster antenna. Does not describe in detail the relationship between the booster antenna and the antenna of the inlet or the antenna built in the IC chip depending on the shape of each other. Therefore, although it is the structure which has a booster antenna, there exists a possibility that the effect by a booster antenna may fade depending on the case.

  The present invention has been made in view of the problems of the prior art as described above, and is an RF-ID medium that can sufficiently obtain the effect of the booster antenna in the RF-ID medium using the booster antenna. The purpose is to provide.

In order to achieve the above object, the present invention provides:
A second antenna is formed on the second base substrate on the first base substrate on which the first antenna through which current flows by electromagnetic waves from the outside is formed, and is connected to the second antenna. In an RF-ID medium that is mounted with an inlet on which an IC chip is mounted and in which current flows to the second antenna by electromagnetic induction caused by current that flows to the first antenna,
The second antenna comprises two spiral antenna portions whose outer peripheral ends are connected to the IC chip, wound in the same direction, and opened at the inner peripheral ends,
The first antenna is
Formed in a region of the first base substrate that does not overlap the IC chip when the inlet is mounted on the first base substrate;
When the inlet is mounted on the first base substrate, the two antenna portions are in a region along or overlapping the outer peripheral portion of each of the two antenna portions including the region between the two antenna portions. possess the electromagnetic current path in which a current flows due to the opposite direction of the spiral,
Further, the first antenna includes two conductive portions and a connection pattern that connects the two conductive portions, and the connection pattern is parallel to each other at an intermediate point between the two conductive portions. Branch to
The IC chip overlaps the area between the two paths .

  In the present invention configured as described above, a current flows to the first antenna due to an electromagnetic wave from the outside, and this current flows to a current path such as an edge of the first antenna. On the first base substrate on which the first antenna is formed, a second antenna composed of two spiral antenna portions is formed on the second base substrate, and the second antenna An inlet on which an IC chip connected to is mounted. When a current flows through the current path of the first antenna, a current flows through the two spiral antenna portions due to electromagnetic induction caused by the current, but the current flowing through the current path of the first antenna is a spiral 2 In the region along or overlapping the outer peripheral part of the two antenna units including the region between the two antenna units, the two antenna units flow in opposite directions in the spiral shape, and the two antenna units are connected to the IC chip at the outer peripheral end. Since they are connected and wound in the same direction and the inner peripheral edge is opened, the IC chip is supplied with current in the same direction by the two antenna parts, thereby providing information on the IC chip. Are written and read.

  As described above, in the present invention, the second antenna is formed on the second base substrate on the first base substrate on which the first antenna through which current flows by electromagnetic waves from the outside is formed. In an RF-ID medium in which an inlet on which an IC chip connected to the second antenna is mounted is mounted, and current flows through the second antenna due to electromagnetic induction caused by current flowing through the first antenna, The two antennas are composed of two spiral antenna parts whose outer peripheral ends are connected to the IC chip, wound in the same direction, and whose inner peripheral ends are opened, and the first antenna is the first antenna When the inlet is mounted on one base substrate, the two antenna parts are arranged along or overlapping the outer peripheral part of each of the two antenna parts including the area between the two antenna parts. The first antenna is a booster antenna, and the second antenna is connected to the IC chip and the current flows through the first antenna. However, when the current flows through the first antenna, the relationship is such that the current flows through the second antenna due to the current. Therefore, the first antenna is a booster antenna, and the effect of this booster antenna is reduced. You can get enough.

It is a figure which shows 1st Embodiment of RF-ID media of this invention, (a) is a figure which shows the surface, (b) is AA 'sectional drawing shown to (a), (c) is a figure. The figure which shows the structure of the booster antenna shown to (a), (d) is a figure which shows the structure of the inlet shown to (a). It is a figure for demonstrating the operation | movement of RF-ID media shown in FIG. It is a figure for demonstrating the effect by the shape of a booster antenna and an inlet antenna shown in FIG. 1, (a) is a figure which shows the inlet antenna which has the shape shown in FIG. 1, (b) is an inlet antenna (a ) Is a diagram showing frequency characteristics in the case of the shape shown in FIG. 9, (c) is a diagram showing an inlet antenna composed of two antenna parts wound in opposite directions, and (d) is an inlet antenna in (c). The figure which shows the frequency characteristic in the case of having shown shape, (e) is a figure which shows the structure which provided the short circuit part in the inlet antenna shown in (c). It is a figure which shows the usage example of RF-ID media shown in FIG. 1, (a) is a figure which shows the state by which the envelope with which RF-ID media was attached was sealed, (b) was shown to (a). AA 'sectional drawing, (c) is a figure which shows the state before an envelope is sealed. FIG. 5 is a diagram for explaining a usage method when the RF-ID medium shown in FIG. 1 is used as shown in FIG. 4. It is a figure which shows 2nd Embodiment of RF-ID media of this invention, (a) is a figure which shows the surface, (b) is AA 'sectional drawing shown to (a), (c) is a figure. The figure which shows the structure of the booster antenna shown to (a), (d) is a figure which shows the structure of the inlet shown to (a). It is a figure which shows 3rd Embodiment of RF-ID media of this invention, (a) is a figure which shows the surface, (b) is AA 'sectional drawing shown to (a), (c) is a figure. The figure which shows the structure of the booster antenna shown to (a), (d) is a figure which shows the structure of the inlet shown to (a). It is a figure which shows 4th Embodiment of RF-ID media of this invention, (a) is a figure which shows the surface, (b) is AA 'sectional drawing shown to (a), (c) is a figure. The figure which shows the structure of the booster antenna shown to (a), (d) is a figure which shows the structure of the inlet shown to (a). It is a figure which shows 5th Embodiment of RF-ID media of this invention, (a) is a figure which shows the surface, (b) is AA 'sectional drawing shown to (a), (c) is a figure. The figure which shows the structure of the booster antenna shown to (a), (d) is a figure which shows the structure of the inlet shown to (a). FIG. 10 is a diagram illustrating frequency characteristics of the RF-ID media illustrated in FIGS. 1 and 6 to 9. It is a figure which shows 6th Embodiment of RF-ID media of this invention, (a) is a figure which shows the surface, (b) is AA 'sectional drawing shown to (a), (c) is a figure. The figure which shows the structure of the booster antenna shown to (a), (d) is a figure which shows the structure of the inlet shown to (a). It is a figure for demonstrating the operation | movement of RF-ID media shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
1A and 1B are diagrams showing a first embodiment of the RF-ID media of the present invention, where FIG. 1A is a diagram showing a surface, FIG. (C) is a figure which shows the structure of the booster antenna 12 shown to (a), (d) is a figure which shows the structure of the inlet 20 shown to (a).

  As shown in FIG. 1, this embodiment is an RF-ID medium 1 in which an inlet 20 is mounted on a paper substrate 11 that is a first base substrate.

  On the paper substrate 11, a coat layer 14 is laminated on the entire surface of one surface, and two trapezoidal bow tie parts 12a and 12b are formed on the paper base 11 so that the upper bases face each other. . The two bow tie portions 12 a and 12 b are connected to each other by a connection pattern 13 that is not opposed to each other among the two corner portions of the upper base. The two bow tie parts 12a and 12b and the connection pattern 13 constitute a booster antenna 12 serving as a first antenna of the present invention. The connection pattern 13 extends from the corner of each of the two bow tie parts 12a and 12b toward the other bow tie part 12a and 12b, and then toward the direction in which the connection pattern 13 extends from the other bow tie part 12a and 12b. Divided into two. Referring to FIG. 1 (c), the connection pattern 13 extends from the upper corner portion of the bow tie portion 12a toward the bow tie portion 12b in the drawing, and is shown at the midpoint between the bow tie portions 12a and 12b. It divides into two toward the lower side, and then extends toward the lower corner of the upper bottom of the bow tie portion 12b in the drawing and is connected to the bow tie portion 12b.

  The inlet 20 has a structure in which an inlet antenna 22 serving as a second antenna is formed on a resin sheet 23 serving as a second base substrate, and an IC chip 21 connected to the inlet antenna 22 is mounted. Has been. The inlet antenna 22 includes two spiral antenna portions 22a and 22b arranged side by side via the IC chip 21, and the two antenna portions 22a and 22b are connected to the IC chip 21 at the outer peripheral ends. Winding in the same direction as each other opens the inner peripheral end.

  The inlet 20 configured as described above is mounted on the paper base material 11 and adhered by the adhesive 30, but in a state where the inlet 20 is mounted on the paper base material 11, FIG. As shown, the upper bottoms of the bow tie portions 12a, 12b and the edges of the connection pattern 13 overlap the outer edges of the spiral outermost pattern of the antenna portions 22a, 22b, and the IC chip 21 is The connection pattern 13 is arranged in an area between two parts. It is possible to use a connection pattern 13 that is not divided into two at the intermediate point between the bow tie parts 12a and 12b, but the one that is divided into two at the intermediate point between the bow tie parts 12a and 12b. However, it is preferable because the connection pattern 13 is not disposed below the IC chip 21. Thus, the configuration of the connection pattern 13 divided into two at the midpoint between the bow tie portions 12a and 12b can also be realized by forming a through hole or a recess in the lower portion of the IC chip 21. it can.

  Hereinafter, an operation of the RF-ID medium 1 configured as described above will be described.

  FIG. 2 is a diagram for explaining the operation of the RF-ID medium 1 shown in FIG.

  When the RF-ID medium 1 shown in FIG. 1 is placed on a reader / writer (not shown) provided outside, first, the booster antenna 12 resonates with radio waves from the reader / writer, and two bowtie units. Current flows through 12a, 12b and the connection pattern 13. At this time, the current flowing through the two bow tie portions 12a and 12b flows through the edges of the bow tie portions 12a and 12b as shown in FIG. In the state where the inlet 20 is mounted on the paper substrate 11, the upper bottoms of the bow tie portions 12a and 12b and the edges of the connection pattern 13 are the outermost peripheral patterns in the spiral shape of the antenna portions 22a and 22b. Since the bow tie portions 12a, 12b and the connection pattern 13 are along the outer peripheral portions of the antenna portions 22a, 22b by overlapping the outer edges, the booster antenna 12 has the inlet 20 on the paper base material 11. In the mounted state, a current path through which a current flows is provided in a region along the outer peripheral portion of the antenna portions 22a and 22b including the region between the antenna portions 22a and 22b of the inlet 20. As for the direction of the current flowing through the current path, for example, the current flowing through the two bow tie portions 12a and 12b flows from the bow tie portion 12a to the bow tie portion 12b as a whole as shown in FIG. In this case, the direction of the current flowing in the region along the outer peripheral portion of the antenna portion 22a is the direction toward the outer peripheral side in the spiral shape of the antenna portion 22a, whereas it flows in the region along the outer peripheral portion of the antenna portion 22b. The direction of the current is the direction toward the inner periphery in the spiral shape of the antenna portion 22b. Conversely, when the current flowing through the two bow tie parts 12a and 12b flows from the bow tie part 12b toward the bow tie part 12a as a whole, the direction of the current flowing through the region along the outer peripheral part of the antenna part 22a is The direction of the current flowing in the region along the outer peripheral portion of the antenna portion 22b is directed toward the outer peripheral side in the spiral shape of the antenna portion 22b, whereas the direction is toward the inner peripheral side in the spiral shape of the antenna portion 22a. Direction. That is, in the current path of the booster antenna 12, current flows in opposite directions in the spiral shape with respect to the two antenna portions 22 a and 22 b in the regions along the outer peripheral portions of the antenna portions 22 a and 22 b of the inlet 20.

  As shown in FIG. 2, when the current flowing through the two bow tie parts 12a and 12b flows from the bow tie part 12a toward the bow tie part 12b as a whole, as shown in FIG. A magnetic field is generated in a direction from the front side to the back side in the area where the antenna portion 22a is disposed, and a magnetic field is generated in a direction from the back side to the front side in the area where the antenna portion 22b of the inlet 20 is disposed.

  Then, as shown in FIG. 2 (c) by the magnetic field generated in this way, in the antenna portion 22a of the inlet 20, a clockwise current flows from the inner peripheral end portion toward the outer peripheral end portion, In the antenna portion 22b of the inlet 20, a counterclockwise current flows in the figure from the outer peripheral end portion toward the inner peripheral end portion.

  Since the IC chip 21 connected to the antenna portions 22a and 22b is connected to the outer peripheral ends of the antenna portions 22a and 22b, the current in the same direction is supplied to the IC chip 21 by the two antenna portions 22a and 22b. As a result, information is written to and read from the IC chip 21.

  Below, the effect by the shape of the booster antenna 12 and the inlet antenna 22 shown in FIG. 1 is demonstrated.

  3 is a diagram for explaining the effects of the shapes of the booster antenna 12 and the inlet antenna 22 shown in FIG. 1, and FIG. 3 (a) is a diagram showing the inlet antenna 22 having the shape shown in FIG. ) Is a diagram showing frequency characteristics when the inlet antenna has the shape shown in (a), (c) is a diagram showing an inlet antenna composed of two antenna parts wound in opposite directions, and (d) is a diagram showing The figure which shows a frequency characteristic in case an inlet antenna is the shape shown to (c), (e) is a figure which shows the structure which provided the short circuit part in the inlet antenna shown to (c).

  When the booster antenna 12 shown in FIG. 1 is combined with the antenna portions 22a and 22b as shown in FIG. 3A, that is, in the RF-ID medium 1 shown in FIG. The power value that can be read is as shown in FIG.

  On the other hand, when the booster antenna 12 shown in FIG. 1 is combined with the inlet antenna as shown in FIG. 3C, the power value at which information can be written to and read from the IC chip 21 is measured.

  In the inlet antenna shown in FIG. 3C, the two spiral antenna portions 22c and 22d are arranged side by side as in the case shown in FIG. The directions are opposite to each other. Therefore, when a current flows through the booster antenna 12 as shown in FIG. 2B, both of the currents flowing through the two antenna portions 22c and 22d are directed from the inner peripheral end portion to the outer peripheral end portion. The currents flowing through the antenna portions 22c and 22d will cancel each other. Therefore, when the inlet antenna shown in FIG. 3C is combined with the booster antenna 12 shown in FIG. 1, the power value at which information can be written to and read from the IC chip 21 is as shown in FIG. Furthermore, it becomes higher than that shown in FIG. That is, the information shown in FIG. 1 cannot be written to or read from the IC chip 21 unless the power value is high.

  Further, the power value at which information can be written to and read from the IC chip 21 when the booster antenna 12 shown in FIG. 1 is combined with the inlet antenna as shown in FIG.

  In the case shown in FIG. 3 (e), like the case shown in FIG. 3 (c), two spiral antenna portions 22e and 22f are arranged side by side and their winding directions are opposite to each other. Further, a short-circuit portion 22g for short-circuiting the two antenna portions 22e and 22f is provided. When such an inlet antenna is combined with the booster antenna 12 shown in FIG. 1, the power value at which information can be written to and read from the IC chip 21 cannot be measured.

  Thus, for the booster antenna 12 shown in FIG. 1, the inlet antenna shown in FIG. 3A, that is, the combination of the inlet antenna 22 shown in FIG. It was found that the accuracy of writing and reading was the best.

  As described above, in this embodiment, each of the two antenna portions 22a and 22b constituting the inlet 22 is connected to the IC chip 21 at the outer peripheral end portion and wound in the same direction so that the inner peripheral end portion is When the inlet 20 is mounted on the paper base 11 on which the booster antenna 12 is formed, the booster antenna 12 includes an antenna including an area between the antenna portions 22a and 22b. The effect of the booster antenna 12 is sufficiently obtained by making the relationship between the two antenna portions 22a and 22b such that currents flow in opposite directions in the spiral shape in the regions along the outer peripheral portions of the portions 22a and 22b. Can get to. Further, since the inlet antenna 22 is not a so-called on-chip antenna formed on the IC chip 21, the length of the inlet antenna is adjusted according to the dielectric constant of the paper substrate 11 on which the inlet 20 is mounted. be able to.

  Below, the usage example of RF-ID medium 1 mentioned above is demonstrated.

  FIG. 4 is a diagram showing an example of use of the RF-ID media 1 shown in FIG. 1, (a) is a diagram showing a state where an envelope with the RF-ID media 1 attached is sealed, and (b) is a diagram showing AA 'sectional drawing shown to (a), (c) is a figure which shows the state before an envelope is sealed. FIG. 5 is a diagram for explaining a usage method when the RF-ID medium 1 shown in FIG. 1 is used as shown in FIG.

  The RF-ID medium 1 shown in FIG. 1 is attached to the envelope 3 as shown in FIG. 4, for example, and can be used to manage the documents enclosed in the envelope 3 and the delivery status of the envelope 3. . The envelope 3 is formed by connecting a front piece 3a, a rear piece 3b, and a flap portion 3c, and the flap portion 3c is folded and adhered to the rear piece 3b by an adhesive 31. When attaching the RF-ID media 1 to such an envelope 3, the RF-ID media 1 is protected from external force by attaching the RF-ID media 1 to an area where the rear piece 3 b and the flap portion 3 c are attached. be able to.

  When the RF-ID medium 1 shown in FIG. 1 is used by being attached to the envelope 3 as shown in FIG. 4, first, the rear piece 3b of the envelope 3 is compared with the envelope 3 before being sealed. Among these, when the envelope 3 is sealed, the coat layer 14 is laminated in a region facing the flap portion 3c (FIG. 5A).

  Next, the booster antenna 12 including the bow tie portions 12a and 12b and the connection pattern 13 is formed on the coat layer 14 by flexographic printing using silver (FIG. 5B).

  Next, the inlet 20 is stuck to the area | region facing the booster antenna 12 of the surface which opposes the rear piece 3b when the envelope 3 is sealed among the flap parts 3c (FIG.5 (c)). At this time, the inlet 20 is stuck to the flap portion 3c by the adhesive 32 so that the surface on which the IC chip 21 is mounted faces the flap portion 3c.

  When the envelope 3 manufactured in this way is sealed, the inlet 20 faces the booster antenna 12 composed of the bow tie portions 12 a and 12 b and the connection pattern 13. Then, the adhesive 30 is applied in advance to the region of the coat layer 14 facing the inlet 20 or the surface of the resin sheet 23 opposite to the surface on which the IC chip 21 is mounted, as shown in FIG. The RF-ID medium 1 is configured (FIG. 5D).

  Note that the RF-ID medium 1 shown in FIG. 1 is not limited to the one realized by such a method of use, and the booster antenna 12 is formed in the lower layer of the copy sheet, the inlet 20 is formed in the upper layer, and the corrugated cardboard is formed. It can be used for the pasting part.

(Second Embodiment)
6A and 6B are diagrams showing a second embodiment of the RF-ID media of the present invention, in which FIG. 6A is a diagram showing the surface, FIG. (C) is a figure which shows the structure of the booster antenna 12 shown to (a), (d) is a figure which shows the structure of the inlet 120 shown to (a).

  As shown in FIG. 6, this embodiment is different from that shown in the first embodiment in the state in which the inlet 120 is mounted on the paper substrate 11, and the upper bottoms of the bow tie portions 12a and 12b. Each of the edges of the connection pattern 13 overlaps with the inner edge of the outermost pattern in the spiral shape of the antenna portions 122a and 122b, so that the bow tie portions 12a and 12b and the connection pattern 13 are spiral shapes of the antenna portions 122a and 122b, respectively. The only difference is that it overlaps the pattern on the outermost periphery.

  Also in the RF-ID medium 101 configured as described above, when it is defeated by an external reader / writer (not shown) as in the first embodiment, a booster antenna is used. 12 resonates with the radio wave from the reader / writer, and a current flows through the edges of the two bow tie parts 12 a and 12 b and the connection pattern 13. That is, in this embodiment, a current path through which current flows in the booster antenna 12 exists in a region overlapping the outer peripheral portions of the antenna portions 122a and 122b of the inlet 120. As in the first embodiment, a magnetic field is generated by the current flowing through the booster antenna 12, and a current flows through the antenna units 122 a and 122 b due to the magnetic field, and information is written to and read from the IC chip 21. Will be done.

(Third embodiment)
7A and 7B are diagrams showing a third embodiment of the RF-ID media of the present invention, where FIG. 7A is a diagram showing the surface, FIG. (C) is a figure which shows the structure of the booster antenna 12 shown to (a), (d) is a figure which shows the structure of the inlet 220 shown to (a).

  As shown in FIG. 7, the present embodiment is different from that shown in the first embodiment in the state where the inlet 220 is mounted on the paper substrate 11, and the upper bottoms of the bow tie portions 12a and 12b. The only difference is that each edge of the connection pattern 13 overlaps the outer edge of the second round pattern from the outermost circumference in the spiral shape of the antenna portions 222a and 222b.

  Also in the RF-ID medium 201 configured as described above, when it is defeated by a reader / writer (not shown) provided outside, as in the case of the first embodiment, a booster antenna 12 resonates with the radio wave from the reader / writer, and a current flows through the edges of the two bow tie parts 12 a and 12 b and the connection pattern 13. That is, also in this embodiment, a current path through which a current flows through the booster antenna 12 exists in a region along the outer peripheral portion of each of the antenna portions 222a and 222b of the inlet 220. As in the first embodiment, a magnetic field is generated by the current flowing through the booster antenna 12, and a current flows through the antenna units 222 a and 222 b due to this magnetic field, and information is written to and read from the IC chip 21. Will be done.

(Fourth embodiment)
8A and 8B are diagrams showing a fourth embodiment of the RF-ID media of the present invention, where FIG. (C) is a figure which shows the structure of the booster antenna 12 shown to (a), (d) is a figure which shows the structure of the inlet 320 shown to (a).

  As shown in FIG. 8, this embodiment is different from that shown in the first embodiment in the state in which the inlet 320 is mounted on the paper substrate 11, and the upper bottoms of the bow tie portions 12a and 12b. The connection pattern 13 is different from the connection pattern 13 only in that it is further outward than the edge of the outermost pattern in the spiral shape of the antenna portions 322a and 322b.

  Also in the RF-ID medium 101 configured as described above, when it is defeated by an external reader / writer (not shown) as in the first embodiment, a booster antenna is used. 12 resonates with the radio wave from the reader / writer, and a current flows through the edges of the two bow tie parts 12 a and 12 b and the connection pattern 13. That is, in this embodiment, a current path through which a current flows in the booster antenna 12 exists in a region along the outer peripheral portion of each of the antenna portions 322a and 322b of the inlet 320. As in the case of the first embodiment, a magnetic field is generated by the current flowing through the booster antenna 12, and the current flows through the antenna units 322a and 322b by this magnetic field, so that information is written to and read from the IC chip 21. Will be done.

(Fifth embodiment)
9A and 9B are diagrams showing a fifth embodiment of the RF-ID media of the present invention, where FIG. 9A is a diagram showing the surface, FIG. (C) is a figure which shows the structure of the booster antenna 12 shown to (a), (d) is a figure which shows the structure of the inlet 420 shown to (a).

  As shown in FIG. 9, this embodiment is different from that shown in the first embodiment in the state where the inlet 420 is mounted on the paper base 11, and the upper bottom of the bow tie portions 12a and 12b. Each of the edges of the connection pattern 13 overlaps the inner edge of the pattern of the second round from the outermost circumference in the spiral shape of the antenna parts 422a, 422b, so that the bow tie parts 12a, 12b and the connection pattern 13 are respectively connected to the antenna parts 422a, The only difference is that it overlaps the pattern of the second round from the outermost circumference in the spiral shape of 422b.

  Also in the RF-ID medium 401 configured as described above, when it is defeated by an external reader / writer (not shown) as in the first embodiment, the booster antenna 12 resonates with the radio wave from the reader / writer, and a current flows through the edges of the two bow tie parts 12 a and 12 b and the connection pattern 13. That is, also in this embodiment, a current path through which a current flows in the booster antenna 12 exists in a region along the outer peripheral portion of each of the antenna portions 422a and 422b of the inlet 420. As in the first embodiment, a magnetic field is generated by the current flowing through the booster antenna 12, and current flows through the antenna units 422a and 422b by this magnetic field, so that information is written to and read from the IC chip 21. Will be done.

  Here, the difference in sensitivity of the RF-ID media 1, 101, 201, 301, 401 shown in the first to fifth embodiments will be described.

  FIG. 10 is a diagram showing the frequency characteristics of the RF-ID media 1, 101, 201, 301, 401 shown in FIG. 1 and FIGS. The frequency characteristics of the RF-ID media 1 shown in FIG. 1 are indicated by a solid line A, the frequency characteristics of the RF-ID media 101 shown in FIG. 6 are indicated by a broken line B, and the RF-ID media 201 shown in FIG. The frequency characteristic of the RF-ID medium 301 shown in FIG. 8 is indicated by a one-dot chain line D, and the frequency characteristic of the RF-ID medium 401 shown in FIG.

  As shown in FIG. 10, among the RF-ID media 1, 101, 201, 301, and 401 shown in FIGS. 1 and 6 to 9, the RF-ID media 101 shown in FIG. Are mounted on the paper base 11, the upper bottoms of the bow tie parts 12a and 12b and the edges of the connection pattern 13 overlap the inner edges of the spiral outermost pattern of the antenna parts 122a and 122b, respectively. Thus, it is understood that the bow tie portions 12a and 12b and the connection pattern 13 overlap with the outermost peripheral pattern in the spiral shape of the antenna portions 122a and 122b, respectively, so that the reflection loss is minimized and the sensitivity is maximized. It was.

  In addition, in the state where the inlet 20 is mounted on the paper base material 11 as in the RF-ID medium 1 shown in FIG. 1, the upper bottoms of the bow tie portions 12 a and 12 b and the edge of the connection pattern 13 are used. Each of the inlets 220 overlaps with the outer edge of the spiral outermost pattern of the antenna portions 22a and 22b, and the inlet 220 is placed on the paper substrate 11 like the RF-ID media 201 shown in FIG. In the mounted state, the upper bottoms of the bow tie parts 12a and 12b and the edges of the connection pattern 13 overlap the outer edges of the second pattern from the outermost circumference in the spiral shape of the antenna parts 222a and 222b, respectively. However, it has been found that the reflection loss is small and is excellent in practical use.

(Sixth embodiment)
11A and 11B are diagrams showing a sixth embodiment of the RF-ID media of the present invention, where FIG. 11A is a diagram showing the surface, FIG. (C) is a figure which shows the structure of the booster antenna 112 shown to (a), (d) is a figure which shows the structure of the inlet 20 shown to (a).

  In this embodiment, as shown in FIG. 11, the trapezoidal bow tie portions 112a and 112b have a shape in which the conductor inside is cut out, as compared with the one shown in the first embodiment. Only the point is different.

  Hereinafter, an operation of the RF-ID medium 501 configured as described above will be described.

  FIG. 12 is a diagram for explaining the operation of the RF-ID medium 501 shown in FIG.

  When the RF-ID medium 501 shown in FIG. 11 is placed on an external reader / writer (not shown), first, the booster antenna 112 resonates with radio waves from the reader / writer, and two bowtie units. A current flows through 112 a and 112 b and the connection pattern 13. At this time, the two bow tie portions 112a and 112b have a shape in which the conductors inside thereof are cut out, so that the regions along the upper bottoms of the bow tie portions 112a and 112b as shown in FIG. The current will flow. In the state where the inlet 20 is mounted on the paper substrate 11, the upper bottoms of the bow tie portions 112a and 112b and the edges of the connection pattern 13 are the outermost peripheral patterns in the spiral shape of the antenna portions 22a and 22b. Since the bow tie portions 112a and 112b and the connection pattern 13 are along the outer peripheral portions of the antenna portions 22a and 22b by overlapping the outer edges, the booster antenna 112 has the inlet 20 on the paper base material 11. In the mounted state, a current path through which a current flows is provided in a region along the outer peripheral portion of the antenna portions 22a and 22b of the inlet 20. Further, in the direction of the current flowing through the current path, for example, when the current flowing through the two bow tie parts 112a and 112b flows from the bow tie part 112a to the bow tie part 112b as a whole, as shown in FIG. Is the direction of the current flowing in the region along the outer peripheral portion of the antenna portion 22a toward the outer peripheral side in a spiral shape of the antenna portion 22a, whereas the current flowing in the region along the outer peripheral portion of the antenna portion 22b Is the direction toward the inner periphery in the spiral shape of the antenna portion 22b. Conversely, when the current flowing through the two bow tie portions 112a and 112b flows from the bow tie portion 112b toward the bow tie portion 112a as a whole, the direction of the current flowing through the region along the outer peripheral portion of the antenna portion 22a is The direction of the current flowing in the region along the outer peripheral portion of the antenna portion 22b is directed toward the outer peripheral side in the spiral shape of the antenna portion 22b, whereas the direction is toward the inner peripheral side in the spiral shape of the antenna portion 22a. Direction. That is, in the current path of the booster antenna 112, current flows in opposite directions in the spiral shape with respect to the two antenna portions 22a and 22b in the regions along the outer peripheral portions of the antenna portions 22a and 22b of the inlet 20, respectively.

  As shown in FIG. 12, when the current flowing through the two bow tie parts 112a and 112b flows from the bow tie part 112a toward the bow tie part 112b as a whole, the current of the inlet 20 is shown in FIG. A magnetic field is generated in a direction from the front side to the back side in the area where the antenna portion 22a is disposed, and a magnetic field is generated in a direction from the back side to the front side in the area where the antenna portion 22b of the inlet 20 is disposed.

  And as shown in FIG.12 (c) by the magnetic field produced in this way, in the antenna part 22a of the inlet 20, the clockwise current flows in the figure from the inner peripheral end to the outer peripheral end, In the antenna portion 22b of the inlet 20, a counterclockwise current flows in the figure from the outer peripheral end portion toward the inner peripheral end portion.

  Since the IC chip 21 connected to the antenna portions 22a and 22b is connected to the outer peripheral ends of the antenna portions 22a and 22b, the current in the same direction is supplied to the IC chip 21 by the two antenna portions 22a and 22b. As a result, information is written to and read from the IC chip 21.

  In the six embodiments described above, when the inlets 20, 120, 220, 320, 420 are mounted on the paper base 11, the antenna portions 22a, 22b, 122a, 122b, 222a, 222b, 322a are mounted. , 322b, 422a, 422b has been described by taking as an example the case where the three sides of the outer peripheral portion are along or overlap the booster antennas 12, 112, but the antenna portions 22a, 22b, 122a, 122b, 222a, 222b, 322a, 322b, It suffices that one side of the outer peripheral portions of 422a and 422b is along or overlaps with the booster antennas 12 and 112.

  In addition, as the first antenna through which current flows by resonating with radio waves from the reader / writer, the above-described two bow tie portions 12a, 12b, 112a, 112 are mounted with the inlets 20, 120, 220, 320, 420. In addition to the booster antennas 12 and 112 including the two bow tie portions 12a, 12b, 112a and 112b as described above, for example, from two meander portions It may be a booster antenna.

  In the above-described two embodiments, the case where the current flows through the booster antennas 12 and 112 by resonating with the radio wave from the reader / writer has been described as an example. However, the current is generated by electromagnetic induction by the reader / writer. It may be flowing.

1, 101, 201, 301, 401, 501 RF-ID media 3 Envelope 3a Front piece 3b Rear piece 3c Flap part 11 Paper substrate 12, 112 Booster antenna 12a, 12b, 112a, 112b Bowtie part 13 Connection pattern 14 Coat layer 20, 120, 220, 320, 420 Inlet 21 IC chip 22, 122, 222, 322, 422 Inlet antenna 22a-22f, 122a, 122b, 222a, 222b, 322a, 322b, 422a, 422b Antenna part 22g Short-circuit part 23 Resin Sheet 30, 31 Adhesive

Claims (1)

  1. A second antenna is formed on the second base substrate on the first base substrate on which the first antenna through which current flows by electromagnetic waves from the outside is formed, and is connected to the second antenna. In an RF-ID medium that is mounted with an inlet on which an IC chip is mounted and in which current flows to the second antenna by electromagnetic induction caused by current that flows to the first antenna,
    The second antenna comprises two spiral antenna portions whose outer peripheral ends are connected to the IC chip, wound in the same direction, and opened at the inner peripheral ends,
    The first antenna is
    Formed in a region of the first base substrate that does not overlap the IC chip when the inlet is mounted on the first base substrate;
    When the inlet is mounted on the first base substrate, the two antenna portions are in a region along or overlapping the outer peripheral portion of each of the two antenna portions including the region between the two antenna portions. possess the electromagnetic current path in which a current flows due to the opposite direction of the spiral,
    Further, the first antenna includes two conductive portions and a connection pattern that connects the two conductive portions, and the connection pattern is parallel to each other at an intermediate point between the two conductive portions. Branch to
    The IC chip is an RF-ID medium overlapping an area between the two paths .
JP2010211104A 2010-09-21 2010-09-21 RF-ID Media Active JP5684520B2 (en)

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JP6417619B2 (en) * 2014-09-30 2018-11-07 トッパン・フォームズ株式会社 Non-contact management media, forms
JP6461061B2 (en) * 2016-09-22 2019-01-30 株式会社ヨコオ Antenna device

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