JP2007043535A - Antenna for rf-id reader/writer device, rf-id reader/writer device using the same, and rd-id system - Google Patents

Antenna for rf-id reader/writer device, rf-id reader/writer device using the same, and rd-id system Download PDF

Info

Publication number
JP2007043535A
JP2007043535A JP2005226460A JP2005226460A JP2007043535A JP 2007043535 A JP2007043535 A JP 2007043535A JP 2005226460 A JP2005226460 A JP 2005226460A JP 2005226460 A JP2005226460 A JP 2005226460A JP 2007043535 A JP2007043535 A JP 2007043535A
Authority
JP
Japan
Prior art keywords
rf
antenna
id
multi
loop antenna
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2005226460A
Other languages
Japanese (ja)
Other versions
JP4720348B2 (en
Inventor
Futoshi Deguchi
太志 出口
Original Assignee
Matsushita Electric Ind Co Ltd
松下電器産業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Ind Co Ltd, 松下電器産業株式会社 filed Critical Matsushita Electric Ind Co Ltd
Priority to JP2005226460A priority Critical patent/JP4720348B2/en
Publication of JP2007043535A publication Critical patent/JP2007043535A/en
Application granted granted Critical
Publication of JP4720348B2 publication Critical patent/JP4720348B2/en
Application status is Expired - Fee Related legal-status Critical
Anticipated expiration legal-status Critical

Links

Images

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antenna for RF-ID reader/writer devices, a RF-ID reader/writer device using the same, and a RF-ID system which are capable of satisfactorily communicate with a plurality of RF-ID tags disposed at narrow intervals so as to overlap. <P>SOLUTION: The antenna for RD-ID reader/writer device is characterized in that an axis approximately parallel with a center axis of an aperture face of a multi-turn loop antenna, which is not aligned to the center axis of the aperture face of the multi-turn loop antenna and doesn't pass the aperture face of the multi-turn loop antenna, is approximately aligned to a center axis of an aperture face of an antenna of at least one RF-ID tag, so that RF-ID tags are closely disposed on an outer peripheral surface of the multi-turn loop antenna. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention uses an HF band (13.56 MHz band) frequency, an antenna for an RF-ID reader / writer device that communicates with a plurality of RF-ID tags, an RF-ID reader / writer device using the antenna, and an RF -Concerning the ID system.

  Conventionally, as an antenna for an RF-ID reader / writer device using a frequency in the HF band (13.56 MHz band), a single-turn or multiple-turn circular or rectangular loop antenna generally configured on the same plane Is in practical use.

  The loop antenna for the RF-ID reader / writer device has the highest magnetic field strength in the direction perpendicular to the opening surface S (the direction of the central axis). Therefore, the positional relationship between the loop antenna on the RF-ID tag side and the loop antenna for the RF-ID reader / writer device is generally arranged so that the opening surfaces S are parallel to each other.

  Further, even when communication with a plurality of RF-ID tags is performed, a plurality of RF-ID tags are arranged on the same plane so that the opening surfaces S do not overlap with each other, and the loop antenna for the RF-ID reader / writer device is arranged. The opening surfaces S are arranged in parallel.

  However, when the product is used for managing an extremely thin article such as a book management application or a CD / DVD management application, the book or CD / DVD case depends on the physical relationship between the size of the RF-ID tag and the thickness of the article. There was a problem that the RF-ID tag could not be pasted on the back cover of this. As a solution, a plurality of RF-ID tags are attached to the front cover surface or back cover surface of the managed article so that the center axes of the tag antennas coincide with each other at narrow intervals (article thickness + α). I had to.

  In the case of performing communication with a plurality of RF-ID tags arranged so as to overlap using a conventional one-turn or multiple-turn circular or rectangular loop antenna configured on the same common plane. The number of tag readings is extremely small due to interference between tags, deviation of the antenna resonance frequency due to interference between the tag and the antenna for the reader / writer device, and basically the distance attenuation of the magnetic field strength, making it impossible to communicate with all tags. There were drawbacks.

  Here, FIG. 14 is an explanatory view showing a conventional antenna for an RF-ID reader / writer device. As shown in FIG. 14 (a), in a one-turn or multiple-turn circular or rectangular loop antenna 101 configured on the same common plane, the magnetic field is most on the central axis Z of the opening surface S. FIG. 15 shows a change in the magnetic field strength at the point p due to an increase in the distance d when the strength is large and the distance between the point p on the central axis Z and the loop antenna 101 is d. From this, it can be seen that when the distance d increases, the magnetic field intensity attenuates and communication is not possible when the operating magnetic field Ht of the tag falls below. FIG. 15 is a graph showing changes in distance and magnetic field strength in the operating state of a conventional antenna for an RF-ID reader / writer device.

  As shown in FIG. 14B, it can be seen that the density of the magnetic flux 102 in this case becomes sparse as the distance d increases. When the tag is further than the distance d1 shown in FIG. 15, communication is not possible and the tag reading range is narrow.

Furthermore, the tag search device described in (Patent Document 1) will be described. FIG. 16 is a diagram for explaining a conventional tag search apparatus. In FIG. 16, the file 201 is managed by putting it in a folder 202 to which a tag 203 is attached. A coil 205 is provided in each tag 203 corresponding to a plurality of tags 203, and the drive circuit 204 is provided. It is devised to communicate sequentially. In this case, the width of the folder 202 and the tag 203 is wider than the thickness of the file 201, and the number of stored items is limited in the management of extremely thin articles such as a book management application and a CD / DVD management application. It was.
JP 7-182357 A

  As described above, in the conventional technique, in the use of managing an extremely thin article such as a book management application or a CD / DVD management application using an RF-ID tag, this drawback is a great obstacle with respect to the tag reading performance. . Specifically, there has been a management problem such as inputting a larger transmission power or intentionally shifting the central axis of the antenna between adjacent tags little by little.

  Therefore, the present invention provides an antenna for an RF-ID reader / writer device that can satisfactorily communicate with a plurality of RF-ID tags arranged at narrow intervals so as to overlap, an RF-ID reader / writer device using the antenna, and An object is to provide an RF-ID system.

  The RF-ID reader / writer device antenna of the present invention has at least one axis that does not match the central axis of the opening surface of the multi-turn loop antenna and is substantially parallel to the central axis that does not pass through the opening surface of the multi-turn loop antenna. The RF-ID tag is arranged close to the outer peripheral side surface of the multi-turn loop antenna so that the central axis of the opening surface of the antenna of the RF-ID tag is substantially coincident.

  The RF-ID reader / writer device also includes the antenna for the RF-ID reader / writer device, supplies power and transmission data to the RF-ID tag by electromagnetic induction, and acquires received data from the RF-ID tag due to load fluctuations. It is characterized by doing.

  Further, the RF-ID system supplies power and transmission data to a plurality of RF-ID tags by electromagnetic induction, and an antenna connected to an RF-ID reader / writer device that acquires received data from the RF-ID tag due to load fluctuations. The antenna is composed of a multi-turn loop antenna, does not match the central axis of the opening surface of the multi-turn loop antenna, does not pass through the opening surface of the multi-turn loop antenna, and is substantially parallel to the central axis; The center axis of the opening surface of the loop antenna of one or a plurality of RF-ID tags is substantially coincided, and a plurality of RF-ID tags are arranged close to each other on the outer peripheral side surface of the multi-turn loop antenna. It is characterized by that.

  According to the present invention, it is possible to satisfactorily communicate with a plurality of RF-ID tags arranged at narrow intervals so as to overlap.

(Embodiment 1)
FIG. 1 is a perspective view showing an RF-ID system according to Embodiment 1 of the present invention. In FIG. 1, 1 is a multi-turn loop antenna, 2 is a housing, 3 is an RF-ID reader / writer device, and 4 is a coaxial cable. Further, 30 is an RF-ID tag, and 31 is a tag side antenna. In addition, S has shown the opening surface.

  As shown in FIG. 1, a multi-turn loop antenna 1 is an antenna for an RF-ID reader / writer device according to the present invention, and is housed in a resin housing 2. The multi-turn loop antenna 1 is connected to the RF-ID reader / writer device 3 through a coaxial cable 4.

  Then, the multi-turn loop antenna 1 connected to the RF-ID reader / writer device 3 supplies power and transmission data to the plurality of RF-ID tags 30 including the tag-side antenna 31 by electromagnetic induction. Received data from 30 is obtained by load fluctuation.

  Further, as shown in FIG. 1, the central axis AA ′ does not match the central axis AA ′ of the opening surface S of the multi-turn loop antenna 1 and does not pass through the opening surface S of the multi-turn loop antenna 1. The central axis BB ′ of the opening surface S of the tag-side antenna 31 of at least one (a plurality in the case of FIG. 1) RF-ID tag 30 with respect to the central axis BB ′ substantially parallel to “ A plurality of RF-ID tags 30 are arranged on a substantially straight line on the surface of the outer peripheral side surface of the multi-loop antenna 1 so as to coincide with each other.

  With such an arrangement, communication with all the RF-ID tags 30 on the outer peripheral side surface of the multi-loop antenna 1 can be realized.

  In the present invention, the multi-loop antenna 1 is used as the antenna for the RF-ID reader / writer device, the central axis AA ′ of the opening surface S, and the openings of the tag-side antennas 31 of the plurality of RF-ID tags 30. A plurality of RF-ID tags 30 which are arranged so as to overlap with each other by not aligning the central axis BB ′ of the surface S and disposing a plurality of RF-ID tags 30 on the opening surface S of the multi-turn loop antenna 1. Communication with the RF-ID tag 30 can be performed satisfactorily.

  The multi-turn loop antenna 1 will be described in more detail. FIG. 2 is a perspective view showing the antenna for the RF-ID reader / writer device according to the first embodiment of the present invention, and FIG. 3 is a bottom view showing the antenna for the RF-ID reader / writer device according to the first embodiment of the present invention. is there. 2 and 3 show details of a state in which the casing 2 of the multi-turn loop antenna 1 is removed. 2 and 3, 5 is an antenna substrate, 6 is an antenna conductor, 7 is a connector, 8 is a start end, 9 is a termination, 10 is a connection, 11 is a transmission line, and 12 is a resonance matching circuit. Show. Reference numeral 60 denotes an intersection.

  As shown in FIGS. 2 and 3, the multi-turn loop antenna 1 includes an antenna substrate 6 provided with an antenna conductor 6, and the antenna conductor 6 having a width W is wound at equal intervals P (n turns). is there. As shown in FIG. 3, each turn of the antenna conductor 6 is connected via an intersection 60. A transmission line 11 is provided between the start end 8 and the end end 9 of the multi-turn loop antenna 1, that is, between the start end 8 that is the start of winding of the antenna conductor 6 and the end end 9 that is the end of winding. In this configuration, a resonance matching circuit unit 12 including a resonance circuit unit and a matching circuit unit with the coaxial cable 4 is provided in the vicinity of one end or the middle point. Further, the other end of the transmission line 11 serves as a connection portion 10 with the termination portion 9. Furthermore, a connector 7 for connecting to the RF-ID reader / writer device 3 is provided at the end of the coaxial cable 4.

  Here, an insulator can be used for the antenna substrate 5, and for example, a resin flat plate such as a printed circuit board or polystyrene foam can be used. The antenna conductor 6 may be a metal (conductive) foil or a metal (conductive) thin plate. The intersection 60 can be the same as the antenna conductor 6. A covered electric wire can be used for the transmission line 11.

  As shown in FIG. 2, the antenna conductor 6 is parallel to a direction perpendicular to the central axis AA ′ of the opening surface S of the multi-loop antenna 1 on the other three surfaces other than the opening surface S. By adopting a multi-winding configuration, it is possible to make the magnetic field strength uniform within the reading range and to stabilize the communication performance.

  In addition, as shown in FIG. 2, the condition that the ratio of the width W and the interval P (pitch P) of the antenna conductor 6 constituting the multi-turn loop antenna 1 is W: P = 1: N (where N ≦ 1) is satisfied. By satisfying a horizontally long structure, the reading range length can be enlarged and thinned, and the magnetic field strength within the communicable range can be made uniform.

  As shown in FIG. 2, the relationship between the number of turns n of the antenna conductor 6 and the total length L, width W, and pitch P of the multi-turn loop antenna 1 exceeds the self-resonance point as the coil. By taking a non-finite value, it is possible to increase the reading range length, reduce the thickness, and improve the communication performance.

  Further, as shown in FIG. 3, a transmission line 11 such as a covered electric wire or a strip line is provided between the start end portion 8 and the end end portion 9 of the antenna conductor 6 constituting the multi-turn loop antenna 1, and the vicinity of one end thereof. Alternatively, by providing a resonance matching circuit unit 12 including a resonance circuit unit and a matching circuit unit with the coaxial cable 4 near the intermediate point, a magnetic field is efficiently radiated at a desired frequency, and a received load fluctuation is detected to perform communication performance. Realized the improvement.

  The multi-turn loop antenna 1 will be further described. FIG. 4 is a side view showing the antenna for the RF-ID reader / writer device according to the first embodiment of the present invention, and FIG. 5 is the RF-ID according to the first embodiment of the present invention. It is sectional drawing which shows the antenna for reader / writer apparatuses. Moreover, FIG. 6 is sectional drawing which shows the other example of the antenna for RF-ID reader-writer apparatuses in Embodiment 1 of this invention. In FIG. 4, the axis AA ′ is the central axis of the aperture surface S, the axes BB ′ and CC ′ do not coincide with the central axis AA ′, and the aperture surface S of the multi-turn loop antenna 1. An axis that does not pass through and is substantially parallel to the central axis AA ′ is shown. 5 and 6, ha and hd are the height of the opening surface S of the multi-turn loop antenna 1, wb and we are the width of the opening surface S of the multi-turn loop antenna 1, and T is the thickness of the antenna conductor 6. Indicates.

  The shape of the opening surface S of the multi-turn loop antenna 1 may be a substantially rectangular shape as shown in FIG. 5, or may be a substantially elliptical shape as shown in FIG.

  As shown in FIG. 5, the multi-loop antenna 1 has a flat structure in which the ratio between the height ha and the width wb of the opening surface S satisfies the condition of ha: wb = 1: N (where N ≧ 2). As a result, the antenna can be thinned.

  Further, as shown in FIG. 6, the ratio between the height ha and the width wb of the opening surface S of the multi-turn loop antenna 1 is flat so as to satisfy the condition of hd: we = 1: N (where N ≧ 2). With the structure, the antenna can be thinned.

  That is, as shown in FIGS. 5 and 6, the shape of the opening surface S of the multi-turn loop antenna 1 is rectangular or elliptical, and the ratio of the height h to the width w is h: w = 1: N ( However, the antenna can be thinned by adopting a flat structure that satisfies the condition of N ≧ 2).

  4 and 5, the ratio of the width wb of the opening surface S of the multi-turn loop antenna 1 to the total length L of the multi-turn loop antenna 1 is wb: L = 1: N (where N ≧ 2). ), The reading range length can be increased and the thickness can be reduced.

  That is, as shown in FIGS. 4 and 6, the ratio of the width we of the opening surface S of the multi-turn loop antenna 1 to the total length L of the multi-turn loop antenna 1 is we: L = 1: N (where N ≧ 2). ), The reading range length can be increased and the thickness can be reduced.

  That is, as shown in FIGS. 4 to 6, the ratio of the width w of the opening surface S of the multi-turn loop antenna 1 to the total length L of the multi-turn loop antenna 1 is w: L = 1: N (where N ≧ 2). ), The reading range length can be increased and the thickness can be reduced.

  7 is a top view showing the antenna for the RF-ID reader / writer device according to the first embodiment of the present invention, and FIG. 8 shows the antenna for the RF-ID reader / writer device according to the first embodiment of the present invention. It is a bottom view. 7 and 8 also show details of the state where the casing 2 of the multi-turn loop antenna 1 is removed. FIG. 8 shows a state in which the transmission line 11 and the resonance matching circuit unit 12 in the multi-turn loop antenna 1 are omitted.

  The method of winding the antenna conductor 6 will be described in detail. First, the antenna conductor 6 a is formed around the antenna substrate 5. As shown in FIG. 8, the antenna conductor 6 a ′ is formed from the starting end portion 8 on the bottom surface, and the antenna conductor 6 a having the surface as shown in FIG. 7 is formed from the antenna conductor 6 a ′. The antenna conductor 6b 'is connected to the antenna conductor 6b' through the intersection 60a to become the next antenna conductor 6b. Then, the winding is sequentially performed, and the antenna conductor 6e "is connected to the antenna conductor 6n 'via the intersecting portion 60e to be the next antenna conductor 6n, and n turns. At this time, the winding end portion of the antenna conductor 6 n ″ portion on the bottom surface becomes the termination portion 9. Thus, on the bottom surface, the gap 50 is provided between the antenna conductor 6a ′ (˜antenna conductor 6n ′) portion and the antenna conductor 6a ″ (˜antenna conductor 6n ″) portion, and the adjacent antenna conductor 6a. Between the antenna conductors 6n, there are intersections 60a to 60e. The intersections 60a to 60e are antenna conductors 6a '' (to antenna conductors 6e '') and antenna conductors 6b '(to antennas). Conductor 6n ') is connected.

  Therefore, as shown in FIGS. 2 to 8, the antenna conductor 6 constituting the multi-turn loop antenna 1 is composed of the antenna conductor 6 a that is the first winding (loop) and the second winding on at least one same surface. A certain antenna conductor 6b is connected from an intersection 60a, and an antenna conductor 6e that is an (n-1) th turn and an antenna conductor 6n that is an nth turn are provided with an intersection 60e.

  FIG. 9 is an explanatory diagram showing the magnetic field distribution in the operating state of the antenna for the RF-ID reader / writer device in the first embodiment of the present invention. Further, FIG. 10 is a graph showing changes in distance and magnetic field strength in the operating state of the antenna for the RF-ID reader / writer device according to Embodiment 1 of the present invention. FIG. 9 shows the state of the magnetic flux in FIG. 4, and FIG. 10 shows the point p due to the increase in the length L when the point p on the central axis BB ′ and the length of the multi-turn loop antenna 1 are L. The change of the magnetic field intensity of is shown. Reference numeral 13 denotes a magnetic flux, and it can be seen that the magnetic flux density is almost uniform in the range of the length L. That is, with respect to the central axis BB ′, as shown in FIG. 1, the central axis B of the opening surface S of the tag-side antenna 31 that is one of the components of the tag of one or a plurality of RF-ID tags 30. −B ′ is substantially matched, and a plurality of RF-ID tags 30 are arranged in a straight line on the outer peripheral side surface of the multi-turn loop antenna 1, so that these RF-ID tags 30 Is given a uniform magnetic field strength, and as shown in FIG. 10, it is possible to give a magnetic field strength greater than the tag operating magnetic field Ht determined by the size of the RF-ID tag 30 and the IC performance to be mounted. Realized tag reading range.

(Embodiment 2)
FIG. 11 is a perspective view showing an antenna for an RF-ID reader / writer device according to Embodiment 2 of the present invention, and FIG. 12 is a cross-sectional view showing the antenna for an RF-ID reader / writer device according to Embodiment 2 of the present invention. is there. 11 and 12, 14 is a magnetic material, and 51 is an antenna substrate.

  As shown in FIGS. 11 and 12, the antenna substrate 51 is filled with a magnetic material 14 having a high magnetic permeability and a low loss such as ferrite, thereby concentrating the magnetic flux, thereby realizing further reduction in thickness and size. In addition, the magnetic field is radiated more efficiently, the reception load fluctuation is detected, and the communication performance is further improved. As in the first embodiment, the antenna conductor 6 is parallel to a direction perpendicular to the central axis AA ′ of the opening surface S of the multi-turn loop antenna 1 on the other three surfaces other than the opening surface S. Thus, the magnetic field strength within the reading range can be made uniform and the communication performance can be stabilized.

  In this way, by filling the opening surface S of the multi-turn loop antenna 1 with the magnetic material 14 having a high magnetic permeability and a low loss such as ferrite, it is possible to reduce the thickness and size and to radiate the magnetic field more efficiently. Thus, it is possible to detect reception load fluctuations and further improve communication performance.

(Embodiment 3)
FIG. 13 is a perspective view showing an RF-ID system according to Embodiment 3 of the present invention. In FIG. 13, 15 is a support base, and 20 is a managed article.

  As shown in FIG. 13, in the application example of the present invention, a predetermined position on the cover surface of the management article 20 having a very small thickness such as CD or DVD (the central axis BB ′ shown in FIGS. 1, 4 and 9). The RF-ID tag 30 is affixed to the loop antenna 1 so as to communicate with the multi-turn loop antenna 1.

  In the first to third embodiments described above, the multi-turn loop antenna 1 is a metal plate or the like except for the communication direction so that communication characteristics such as impedance can be adjusted in advance for the purpose of avoiding the influence of external metal. It may be covered with.

  By adopting such a flat, flat, multi-turn loop antenna 1, a wide tag reading range is realized for a plurality of tags superimposed at a narrow interval. As a result, even if the RF-ID tag cannot be attached to the back cover of a book or CD / DVD case, such as for managing an extremely thin article such as a book management application or a CD / DVD management application, the front cover surface or back cover surface Communication with the RF-ID tag affixed to was enabled.

  The antenna for an RF-ID reader / writer device of the present invention, the RF-ID reader / writer device using the antenna, and the RF-ID system require a wide tag reading range for a plurality of tags stacked at a narrow interval. , An antenna for an RF-ID reader / writer device that communicates with a plurality of RF-ID tags using a frequency in the HF band (13.56 MHz band), an RF-ID reader / writer device using the antenna, and an RF-ID system It can be applied to other uses.

The perspective view which shows the RF-ID system in Embodiment 1 of this invention The perspective view which shows the antenna for RF-ID reader-writer apparatuses in Embodiment 1 of this invention The bottom view which shows the antenna for RF-ID reader-writer apparatuses in Embodiment 1 of this invention The side view which shows the antenna for RF-ID reader-writer apparatuses in Embodiment 1 of this invention Sectional drawing which shows the antenna for RF-ID reader-writer apparatuses in Embodiment 1 of this invention Sectional drawing which shows the other example of the antenna for RF-ID reader-writer apparatuses in Embodiment 1 of this invention The top view which shows the antenna for RF-ID reader-writer apparatuses in Embodiment 1 of this invention The bottom view which shows the antenna for RF-ID reader-writer apparatuses in Embodiment 1 of this invention Explanatory drawing which shows magnetic field distribution in the operation state of the antenna for RF-ID reader-writer apparatuses in Embodiment 1 of this invention The graph which shows the change of the distance and magnetic field intensity in the operation state of the antenna for RF-ID reader-writer apparatuses in Embodiment 1 of this invention The perspective view which shows the antenna for RF-ID reader-writer apparatuses in Embodiment 2 of this invention Sectional drawing which shows the antenna for RF-ID reader-writer apparatuses in Embodiment 2 of this invention The perspective view which shows the RF-ID system in Embodiment 3 of this invention Explanatory drawing which shows the antenna for the conventional RF-ID reader / writer apparatus The graph which shows the change of the distance and magnetic field intensity in the operation state of the antenna for conventional RF-ID reader-writer apparatuses The figure explaining the conventional tag search device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Multi-winding loop antenna 2 Case 3 RF-ID reader / writer device 4 Coaxial cable 5 Antenna substrate 6 Antenna conductor 7 Connector 8 Start end portion 9 End portion 10 Connection portion 11 Transmission line 12 Resonance matching circuit portion 13 Magnetic flux 14 Magnetic material 15 Support Stand

Claims (10)

  1. An antenna connected to an RFID reader / writer device that supplies electric power and transmission data to a plurality of RF-ID tags by electromagnetic induction and obtains reception data from the RF-ID tag by load fluctuation, the antenna being a multi-turn loop An antenna, an axis that does not coincide with the central axis of the aperture surface of the multi-turn loop antenna, does not pass through the aperture surface of the multi-loop antenna, and is substantially parallel to the central axis; and one or more RF- The RF-characteristic is characterized in that a plurality of RF-ID tags are arranged close to each other in a straight line on the outer circumferential side surface of the multi-loop antenna with the central axis of the opening surface of the loop antenna of the ID tag substantially matched. ID system.
  2. A flat structure in which the shape of the opening surface of the multi-turn loop antenna is a rectangle or an ellipse, and the ratio of the height h to the width w satisfies the condition of h: w = 1: N (where N ≧ 2). The RF-ID system according to claim 1, wherein:
  3. The ratio of the maximum length w and the total length L of the opening surface S of the multi-turn loop antenna is a horizontally long structure that satisfies a condition of w: L = 1: N (where N ≧ 2). Item 4. The RF-ID system according to Item 1.
  4. The antenna conductor constituting the multi-turn loop antenna is made of a metal (conductive) foil or a metal (conductive) thin plate, and the ratio of the width W and the pitch P of the antenna conductor is W: P = 1: N ( However, the RF-ID system according to claim 1, wherein the system has a horizontally long structure that satisfies a condition of N ≦ 1).
  5. The relationship between the number of turns n of the antenna conductor constituting the multi-turn loop antenna and the total length L, width W, and pitch P of the multi-turn loop antenna is a finite value that does not exceed the self-resonance point of the coil as a coil. The RF-ID system according to claim 1, wherein:
  6. The antenna conductor constituting the multi-turn loop antenna is provided with an intersection of the first loop and the second loop on at least one same surface, and the antenna conductor is provided on the three faces other than the other opening face. 2. The RF-ID system according to claim 1, wherein the RF-ID system is wound in parallel in a direction perpendicular to the central axis of the opening surface of the loop antenna.
  7. A transmission line is provided between the winding start portion and the winding end portion of the antenna conductor constituting the multi-turn loop antenna, and either from one end thereof or from the matching circuit portion with the coaxial circuit near the intermediate point The RF-ID system according to claim 1, further comprising a resonance matching circuit unit.
  8. 8. The RF-ID system according to claim 1, wherein a magnetic material is filled in an opening surface of the multi-turn loop antenna.
  9. An axis that does not match the central axis of the opening surface of the multi-turn loop antenna and that is substantially parallel to the central axis that does not pass through the opening surface of the multi-turn loop antenna;
    The central axis of the opening surface of the antenna of at least one RF-ID tag is substantially matched,
    An antenna for an RF-ID reader / writer device, wherein the RF-ID tag is arranged close to the outer peripheral side surface of the multi-turn loop antenna.
  10. An RF-ID reader / writer device antenna according to claim 9 is provided, wherein power and transmission data are supplied to the RF-ID tag by electromagnetic induction, and received data is acquired from the RF-ID tag by load fluctuation. RFID reader / writer device.
JP2005226460A 2005-08-04 2005-08-04 Antenna for RF-ID reader / writer device, RF-ID reader / writer device using the antenna, and RF-ID system Expired - Fee Related JP4720348B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005226460A JP4720348B2 (en) 2005-08-04 2005-08-04 Antenna for RF-ID reader / writer device, RF-ID reader / writer device using the antenna, and RF-ID system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005226460A JP4720348B2 (en) 2005-08-04 2005-08-04 Antenna for RF-ID reader / writer device, RF-ID reader / writer device using the antenna, and RF-ID system

Publications (2)

Publication Number Publication Date
JP2007043535A true JP2007043535A (en) 2007-02-15
JP4720348B2 JP4720348B2 (en) 2011-07-13

Family

ID=37801090

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005226460A Expired - Fee Related JP4720348B2 (en) 2005-08-04 2005-08-04 Antenna for RF-ID reader / writer device, RF-ID reader / writer device using the antenna, and RF-ID system

Country Status (1)

Country Link
JP (1) JP4720348B2 (en)

Cited By (86)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009033485A (en) * 2007-07-27 2009-02-12 Panasonic Corp Antenna device, and radio communication equipment
US7857230B2 (en) 2007-07-18 2010-12-28 Murata Manufacturing Co., Ltd. Wireless IC device and manufacturing method thereof
US7871008B2 (en) 2008-06-25 2011-01-18 Murata Manufacturing Co., Ltd. Wireless IC device and manufacturing method thereof
US7931206B2 (en) 2007-05-10 2011-04-26 Murata Manufacturing Co., Ltd. Wireless IC device
US7967216B2 (en) 2008-05-22 2011-06-28 Murata Manufacturing Co., Ltd. Wireless IC device
US7997501B2 (en) 2007-07-17 2011-08-16 Murata Manufacturing Co., Ltd. Wireless IC device and electronic apparatus
US8031124B2 (en) 2007-01-26 2011-10-04 Murata Manufacturing Co., Ltd. Container with electromagnetic coupling module
US8070070B2 (en) 2007-12-26 2011-12-06 Murata Manufacturing Co., Ltd. Antenna device and radio frequency IC device
US8078106B2 (en) 2006-01-19 2011-12-13 Murata Manufacturing Co., Ltd. Wireless IC device and component for wireless IC device
US8081121B2 (en) 2006-10-27 2011-12-20 Murata Manufacturing Co., Ltd. Article having electromagnetic coupling module attached thereto
US8179329B2 (en) 2008-03-03 2012-05-15 Murata Manufacturing Co., Ltd. Composite antenna
US8177138B2 (en) 2008-10-29 2012-05-15 Murata Manufacturing Co., Ltd. Radio IC device
US8193939B2 (en) 2007-07-09 2012-06-05 Murata Manufacturing Co., Ltd. Wireless IC device
US8228765B2 (en) 2006-06-30 2012-07-24 Murata Manufacturing Co., Ltd. Optical disc
US8264357B2 (en) 2007-06-27 2012-09-11 Murata Manufacturing Co., Ltd. Wireless IC device
US8299968B2 (en) 2007-02-06 2012-10-30 Murata Manufacturing Co., Ltd. Packaging material with electromagnetic coupling module
US8299929B2 (en) 2006-09-26 2012-10-30 Murata Manufacturing Co., Ltd. Inductively coupled module and item with inductively coupled module
US8336786B2 (en) 2010-03-12 2012-12-25 Murata Manufacturing Co., Ltd. Wireless communication device and metal article
US8342416B2 (en) 2009-01-09 2013-01-01 Murata Manufacturing Co., Ltd. Wireless IC device, wireless IC module and method of manufacturing wireless IC module
US8360325B2 (en) 2008-04-14 2013-01-29 Murata Manufacturing Co., Ltd. Wireless IC device, electronic apparatus, and method for adjusting resonant frequency of wireless IC device
US8360324B2 (en) 2007-04-09 2013-01-29 Murata Manufacturing Co., Ltd. Wireless IC device
US8381997B2 (en) 2009-06-03 2013-02-26 Murata Manufacturing Co., Ltd. Radio frequency IC device and method of manufacturing the same
US8390459B2 (en) 2007-04-06 2013-03-05 Murata Manufacturing Co., Ltd. Wireless IC device
US8400307B2 (en) 2007-07-18 2013-03-19 Murata Manufacturing Co., Ltd. Radio frequency IC device and electronic apparatus
US8400365B2 (en) 2009-11-20 2013-03-19 Murata Manufacturing Co., Ltd. Antenna device and mobile communication terminal
US8418928B2 (en) 2009-04-14 2013-04-16 Murata Manufacturing Co., Ltd. Wireless IC device component and wireless IC device
US8424769B2 (en) 2010-07-08 2013-04-23 Murata Manufacturing Co., Ltd. Antenna and RFID device
US8424762B2 (en) 2007-04-14 2013-04-23 Murata Manufacturing Co., Ltd. Wireless IC device and component for wireless IC device
US8474725B2 (en) 2007-04-27 2013-07-02 Murata Manufacturing Co., Ltd. Wireless IC device
US8531346B2 (en) 2007-04-26 2013-09-10 Murata Manufacturing Co., Ltd. Wireless IC device
US8546927B2 (en) 2010-09-03 2013-10-01 Murata Manufacturing Co., Ltd. RFIC chip mounting structure
US8583043B2 (en) 2009-01-16 2013-11-12 Murata Manufacturing Co., Ltd. High-frequency device and wireless IC device
US8590797B2 (en) 2008-05-21 2013-11-26 Murata Manufacturing Co., Ltd. Wireless IC device
US8596545B2 (en) 2008-05-28 2013-12-03 Murata Manufacturing Co., Ltd. Component of wireless IC device and wireless IC device
US8602310B2 (en) 2010-03-03 2013-12-10 Murata Manufacturing Co., Ltd. Radio communication device and radio communication terminal
US8610636B2 (en) 2007-12-20 2013-12-17 Murata Manufacturing Co., Ltd. Radio frequency IC device
US8613395B2 (en) 2011-02-28 2013-12-24 Murata Manufacturing Co., Ltd. Wireless communication device
US8632014B2 (en) 2007-04-27 2014-01-21 Murata Manufacturing Co., Ltd. Wireless IC device
US8668151B2 (en) 2008-03-26 2014-03-11 Murata Manufacturing Co., Ltd. Wireless IC device
US8680971B2 (en) 2009-09-28 2014-03-25 Murata Manufacturing Co., Ltd. Wireless IC device and method of detecting environmental state using the device
US8692718B2 (en) 2008-11-17 2014-04-08 Murata Manufacturing Co., Ltd. Antenna and wireless IC device
US8718727B2 (en) 2009-12-24 2014-05-06 Murata Manufacturing Co., Ltd. Antenna having structure for multi-angled reception and mobile terminal including the antenna
US8720789B2 (en) 2012-01-30 2014-05-13 Murata Manufacturing Co., Ltd. Wireless IC device
US8740093B2 (en) 2011-04-13 2014-06-03 Murata Manufacturing Co., Ltd. Radio IC device and radio communication terminal
US8757500B2 (en) 2007-05-11 2014-06-24 Murata Manufacturing Co., Ltd. Wireless IC device
US8770489B2 (en) 2011-07-15 2014-07-08 Murata Manufacturing Co., Ltd. Radio communication device
US8797225B2 (en) 2011-03-08 2014-08-05 Murata Manufacturing Co., Ltd. Antenna device and communication terminal apparatus
US8797148B2 (en) 2008-03-03 2014-08-05 Murata Manufacturing Co., Ltd. Radio frequency IC device and radio communication system
US8810456B2 (en) 2009-06-19 2014-08-19 Murata Manufacturing Co., Ltd. Wireless IC device and coupling method for power feeding circuit and radiation plate
US8814056B2 (en) 2011-07-19 2014-08-26 Murata Manufacturing Co., Ltd. Antenna device, RFID tag, and communication terminal apparatus
US8847831B2 (en) 2009-07-03 2014-09-30 Murata Manufacturing Co., Ltd. Antenna and antenna module
US8853549B2 (en) 2009-09-30 2014-10-07 Murata Manufacturing Co., Ltd. Circuit substrate and method of manufacturing same
JP2014203139A (en) * 2013-04-01 2014-10-27 株式会社ユニバーサルエンターテインメント Storage device of token
US8870077B2 (en) 2008-08-19 2014-10-28 Murata Manufacturing Co., Ltd. Wireless IC device and method for manufacturing same
US8878739B2 (en) 2011-07-14 2014-11-04 Murata Manufacturing Co., Ltd. Wireless communication device
US8905296B2 (en) 2011-12-01 2014-12-09 Murata Manufacturing Co., Ltd. Wireless integrated circuit device and method of manufacturing the same
US8905316B2 (en) 2010-05-14 2014-12-09 Murata Manufacturing Co., Ltd. Wireless IC device
US8937576B2 (en) 2011-04-05 2015-01-20 Murata Manufacturing Co., Ltd. Wireless communication device
US8944335B2 (en) 2010-09-30 2015-02-03 Murata Manufacturing Co., Ltd. Wireless IC device
US8976075B2 (en) 2009-04-21 2015-03-10 Murata Manufacturing Co., Ltd. Antenna device and method of setting resonant frequency of antenna device
US8981906B2 (en) 2010-08-10 2015-03-17 Murata Manufacturing Co., Ltd. Printed wiring board and wireless communication system
US8994605B2 (en) 2009-10-02 2015-03-31 Murata Manufacturing Co., Ltd. Wireless IC device and electromagnetic coupling module
US8991713B2 (en) 2011-01-14 2015-03-31 Murata Manufacturing Co., Ltd. RFID chip package and RFID tag
US9024837B2 (en) 2010-03-31 2015-05-05 Murata Manufacturing Co., Ltd. Antenna and wireless communication device
US9024725B2 (en) 2009-11-04 2015-05-05 Murata Manufacturing Co., Ltd. Communication terminal and information processing system
US9077067B2 (en) 2008-07-04 2015-07-07 Murata Manufacturing Co., Ltd. Radio IC device
US9104950B2 (en) 2009-01-30 2015-08-11 Murata Manufacturing Co., Ltd. Antenna and wireless IC device
US9123996B2 (en) 2010-05-14 2015-09-01 Murata Manufacturing Co., Ltd. Wireless IC device
US9165239B2 (en) 2006-04-26 2015-10-20 Murata Manufacturing Co., Ltd. Electromagnetic-coupling-module-attached article
US9166291B2 (en) 2010-10-12 2015-10-20 Murata Manufacturing Co., Ltd. Antenna device and communication terminal apparatus
US9178279B2 (en) 2009-11-04 2015-11-03 Murata Manufacturing Co., Ltd. Wireless IC tag, reader-writer, and information processing system
US9231305B2 (en) 2008-10-24 2016-01-05 Murata Manufacturing Co., Ltd. Wireless IC device
US9236651B2 (en) 2010-10-21 2016-01-12 Murata Manufacturing Co., Ltd. Communication terminal device
US9281873B2 (en) 2008-05-26 2016-03-08 Murata Manufacturing Co., Ltd. Wireless IC device system and method of determining authenticity of wireless IC device
US9378452B2 (en) 2011-05-16 2016-06-28 Murata Manufacturing Co., Ltd. Radio IC device
US9444143B2 (en) 2009-10-16 2016-09-13 Murata Manufacturing Co., Ltd. Antenna and wireless IC device
US9460376B2 (en) 2007-07-18 2016-10-04 Murata Manufacturing Co., Ltd. Radio IC device
US9460320B2 (en) 2009-10-27 2016-10-04 Murata Manufacturing Co., Ltd. Transceiver and radio frequency identification tag reader
US9461363B2 (en) 2009-11-04 2016-10-04 Murata Manufacturing Co., Ltd. Communication terminal and information processing system
US9543642B2 (en) 2011-09-09 2017-01-10 Murata Manufacturing Co., Ltd. Antenna device and wireless device
US9558384B2 (en) 2010-07-28 2017-01-31 Murata Manufacturing Co., Ltd. Antenna apparatus and communication terminal instrument
US9692128B2 (en) 2012-02-24 2017-06-27 Murata Manufacturing Co., Ltd. Antenna device and wireless communication device
US9727765B2 (en) 2010-03-24 2017-08-08 Murata Manufacturing Co., Ltd. RFID system including a reader/writer and RFID tag
US9761923B2 (en) 2011-01-05 2017-09-12 Murata Manufacturing Co., Ltd. Wireless communication device
US10013650B2 (en) 2010-03-03 2018-07-03 Murata Manufacturing Co., Ltd. Wireless communication module and wireless communication device
US10235544B2 (en) 2012-04-13 2019-03-19 Murata Manufacturing Co., Ltd. Inspection method and inspection device for RFID tag

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001101285A (en) * 1999-09-29 2001-04-13 Hitachi Kokusai Electric Inc System for managing article
JP2002521757A (en) * 1998-07-20 2002-07-16 インテグレイテッド シリコン デザイン ピーティーワイ.エルティーディ. Metal shielded electronic labeling system
JP2005165839A (en) * 2003-12-04 2005-06-23 Nippon Signal Co Ltd:The Reader/writer, ic tag, article control device, and optical disk device
JP2005182637A (en) * 2003-12-22 2005-07-07 Shinko Electric Ind Co Ltd Reader/writer antenna for ic tag
JP2007004678A (en) * 2005-06-27 2007-01-11 Akiba:Kk Retrieval management system using rfid

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002521757A (en) * 1998-07-20 2002-07-16 インテグレイテッド シリコン デザイン ピーティーワイ.エルティーディ. Metal shielded electronic labeling system
JP2001101285A (en) * 1999-09-29 2001-04-13 Hitachi Kokusai Electric Inc System for managing article
JP2005165839A (en) * 2003-12-04 2005-06-23 Nippon Signal Co Ltd:The Reader/writer, ic tag, article control device, and optical disk device
JP2005182637A (en) * 2003-12-22 2005-07-07 Shinko Electric Ind Co Ltd Reader/writer antenna for ic tag
JP2007004678A (en) * 2005-06-27 2007-01-11 Akiba:Kk Retrieval management system using rfid

Cited By (113)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8676117B2 (en) 2006-01-19 2014-03-18 Murata Manufacturing Co., Ltd. Wireless IC device and component for wireless IC device
US8725071B2 (en) 2006-01-19 2014-05-13 Murata Manufacturing Co., Ltd. Wireless IC device and component for wireless IC device
US8326223B2 (en) 2006-01-19 2012-12-04 Murata Manufacturing Co., Ltd. Wireless IC device and component for wireless IC device
US8078106B2 (en) 2006-01-19 2011-12-13 Murata Manufacturing Co., Ltd. Wireless IC device and component for wireless IC device
US9165239B2 (en) 2006-04-26 2015-10-20 Murata Manufacturing Co., Ltd. Electromagnetic-coupling-module-attached article
US8228765B2 (en) 2006-06-30 2012-07-24 Murata Manufacturing Co., Ltd. Optical disc
US8299929B2 (en) 2006-09-26 2012-10-30 Murata Manufacturing Co., Ltd. Inductively coupled module and item with inductively coupled module
US8081121B2 (en) 2006-10-27 2011-12-20 Murata Manufacturing Co., Ltd. Article having electromagnetic coupling module attached thereto
US8031124B2 (en) 2007-01-26 2011-10-04 Murata Manufacturing Co., Ltd. Container with electromagnetic coupling module
US8299968B2 (en) 2007-02-06 2012-10-30 Murata Manufacturing Co., Ltd. Packaging material with electromagnetic coupling module
US8390459B2 (en) 2007-04-06 2013-03-05 Murata Manufacturing Co., Ltd. Wireless IC device
US8360324B2 (en) 2007-04-09 2013-01-29 Murata Manufacturing Co., Ltd. Wireless IC device
US8424762B2 (en) 2007-04-14 2013-04-23 Murata Manufacturing Co., Ltd. Wireless IC device and component for wireless IC device
US8531346B2 (en) 2007-04-26 2013-09-10 Murata Manufacturing Co., Ltd. Wireless IC device
US8474725B2 (en) 2007-04-27 2013-07-02 Murata Manufacturing Co., Ltd. Wireless IC device
US8632014B2 (en) 2007-04-27 2014-01-21 Murata Manufacturing Co., Ltd. Wireless IC device
US7931206B2 (en) 2007-05-10 2011-04-26 Murata Manufacturing Co., Ltd. Wireless IC device
US8757500B2 (en) 2007-05-11 2014-06-24 Murata Manufacturing Co., Ltd. Wireless IC device
US8264357B2 (en) 2007-06-27 2012-09-11 Murata Manufacturing Co., Ltd. Wireless IC device
US8662403B2 (en) 2007-07-04 2014-03-04 Murata Manufacturing Co., Ltd. Wireless IC device and component for wireless IC device
US8552870B2 (en) 2007-07-09 2013-10-08 Murata Manufacturing Co., Ltd. Wireless IC device
US8193939B2 (en) 2007-07-09 2012-06-05 Murata Manufacturing Co., Ltd. Wireless IC device
US7997501B2 (en) 2007-07-17 2011-08-16 Murata Manufacturing Co., Ltd. Wireless IC device and electronic apparatus
US8413907B2 (en) 2007-07-17 2013-04-09 Murata Manufacturing Co., Ltd. Wireless IC device and electronic apparatus
US8191791B2 (en) 2007-07-17 2012-06-05 Murata Manufacturing Co., Ltd. Wireless IC device and electronic apparatus
US7857230B2 (en) 2007-07-18 2010-12-28 Murata Manufacturing Co., Ltd. Wireless IC device and manufacturing method thereof
US9460376B2 (en) 2007-07-18 2016-10-04 Murata Manufacturing Co., Ltd. Radio IC device
US8400307B2 (en) 2007-07-18 2013-03-19 Murata Manufacturing Co., Ltd. Radio frequency IC device and electronic apparatus
US9830552B2 (en) 2007-07-18 2017-11-28 Murata Manufacturing Co., Ltd. Radio IC device
US7786943B2 (en) 2007-07-27 2010-08-31 Panasonic Corporation Antenna device and radio communication system
JP2009033485A (en) * 2007-07-27 2009-02-12 Panasonic Corp Antenna device, and radio communication equipment
US8610636B2 (en) 2007-12-20 2013-12-17 Murata Manufacturing Co., Ltd. Radio frequency IC device
US8915448B2 (en) 2007-12-26 2014-12-23 Murata Manufacturing Co., Ltd. Antenna device and radio frequency IC device
US8070070B2 (en) 2007-12-26 2011-12-06 Murata Manufacturing Co., Ltd. Antenna device and radio frequency IC device
US8360330B2 (en) 2007-12-26 2013-01-29 Murata Manufacturing Co., Ltd. Antenna device and radio frequency IC device
US8179329B2 (en) 2008-03-03 2012-05-15 Murata Manufacturing Co., Ltd. Composite antenna
US8797148B2 (en) 2008-03-03 2014-08-05 Murata Manufacturing Co., Ltd. Radio frequency IC device and radio communication system
US8668151B2 (en) 2008-03-26 2014-03-11 Murata Manufacturing Co., Ltd. Wireless IC device
US8360325B2 (en) 2008-04-14 2013-01-29 Murata Manufacturing Co., Ltd. Wireless IC device, electronic apparatus, and method for adjusting resonant frequency of wireless IC device
US8960557B2 (en) 2008-05-21 2015-02-24 Murata Manufacturing Co., Ltd. Wireless IC device
US8973841B2 (en) 2008-05-21 2015-03-10 Murata Manufacturing Co., Ltd. Wireless IC device
US9022295B2 (en) 2008-05-21 2015-05-05 Murata Manufacturing Co., Ltd. Wireless IC device
US8590797B2 (en) 2008-05-21 2013-11-26 Murata Manufacturing Co., Ltd. Wireless IC device
US8047445B2 (en) 2008-05-22 2011-11-01 Murata Manufacturing Co., Ltd. Wireless IC device and method of manufacturing the same
US7967216B2 (en) 2008-05-22 2011-06-28 Murata Manufacturing Co., Ltd. Wireless IC device
US9281873B2 (en) 2008-05-26 2016-03-08 Murata Manufacturing Co., Ltd. Wireless IC device system and method of determining authenticity of wireless IC device
US8596545B2 (en) 2008-05-28 2013-12-03 Murata Manufacturing Co., Ltd. Component of wireless IC device and wireless IC device
US7871008B2 (en) 2008-06-25 2011-01-18 Murata Manufacturing Co., Ltd. Wireless IC device and manufacturing method thereof
US8011589B2 (en) 2008-06-25 2011-09-06 Murata Manufacturing Co., Ltd. Wireless IC device and manufacturing method thereof
US9077067B2 (en) 2008-07-04 2015-07-07 Murata Manufacturing Co., Ltd. Radio IC device
US8870077B2 (en) 2008-08-19 2014-10-28 Murata Manufacturing Co., Ltd. Wireless IC device and method for manufacturing same
US9231305B2 (en) 2008-10-24 2016-01-05 Murata Manufacturing Co., Ltd. Wireless IC device
US8177138B2 (en) 2008-10-29 2012-05-15 Murata Manufacturing Co., Ltd. Radio IC device
US8917211B2 (en) 2008-11-17 2014-12-23 Murata Manufacturing Co., Ltd. Antenna and wireless IC device
US8692718B2 (en) 2008-11-17 2014-04-08 Murata Manufacturing Co., Ltd. Antenna and wireless IC device
US8544759B2 (en) 2009-01-09 2013-10-01 Murata Manufacturing., Ltd. Wireless IC device, wireless IC module and method of manufacturing wireless IC module
US8342416B2 (en) 2009-01-09 2013-01-01 Murata Manufacturing Co., Ltd. Wireless IC device, wireless IC module and method of manufacturing wireless IC module
US8583043B2 (en) 2009-01-16 2013-11-12 Murata Manufacturing Co., Ltd. High-frequency device and wireless IC device
US9104950B2 (en) 2009-01-30 2015-08-11 Murata Manufacturing Co., Ltd. Antenna and wireless IC device
US8418928B2 (en) 2009-04-14 2013-04-16 Murata Manufacturing Co., Ltd. Wireless IC device component and wireless IC device
US8690070B2 (en) 2009-04-14 2014-04-08 Murata Manufacturing Co., Ltd. Wireless IC device component and wireless IC device
US8876010B2 (en) 2009-04-14 2014-11-04 Murata Manufacturing Co., Ltd Wireless IC device component and wireless IC device
US8976075B2 (en) 2009-04-21 2015-03-10 Murata Manufacturing Co., Ltd. Antenna device and method of setting resonant frequency of antenna device
US9203157B2 (en) 2009-04-21 2015-12-01 Murata Manufacturing Co., Ltd. Antenna device and method of setting resonant frequency of antenna device
US9564678B2 (en) 2009-04-21 2017-02-07 Murata Manufacturing Co., Ltd. Antenna device and method of setting resonant frequency of antenna device
US8381997B2 (en) 2009-06-03 2013-02-26 Murata Manufacturing Co., Ltd. Radio frequency IC device and method of manufacturing the same
US8810456B2 (en) 2009-06-19 2014-08-19 Murata Manufacturing Co., Ltd. Wireless IC device and coupling method for power feeding circuit and radiation plate
US8847831B2 (en) 2009-07-03 2014-09-30 Murata Manufacturing Co., Ltd. Antenna and antenna module
US8680971B2 (en) 2009-09-28 2014-03-25 Murata Manufacturing Co., Ltd. Wireless IC device and method of detecting environmental state using the device
US8853549B2 (en) 2009-09-30 2014-10-07 Murata Manufacturing Co., Ltd. Circuit substrate and method of manufacturing same
US8994605B2 (en) 2009-10-02 2015-03-31 Murata Manufacturing Co., Ltd. Wireless IC device and electromagnetic coupling module
US9117157B2 (en) 2009-10-02 2015-08-25 Murata Manufacturing Co., Ltd. Wireless IC device and electromagnetic coupling module
US9444143B2 (en) 2009-10-16 2016-09-13 Murata Manufacturing Co., Ltd. Antenna and wireless IC device
US9460320B2 (en) 2009-10-27 2016-10-04 Murata Manufacturing Co., Ltd. Transceiver and radio frequency identification tag reader
US9178279B2 (en) 2009-11-04 2015-11-03 Murata Manufacturing Co., Ltd. Wireless IC tag, reader-writer, and information processing system
US9461363B2 (en) 2009-11-04 2016-10-04 Murata Manufacturing Co., Ltd. Communication terminal and information processing system
US9024725B2 (en) 2009-11-04 2015-05-05 Murata Manufacturing Co., Ltd. Communication terminal and information processing system
US8400365B2 (en) 2009-11-20 2013-03-19 Murata Manufacturing Co., Ltd. Antenna device and mobile communication terminal
US8704716B2 (en) 2009-11-20 2014-04-22 Murata Manufacturing Co., Ltd. Antenna device and mobile communication terminal
US8718727B2 (en) 2009-12-24 2014-05-06 Murata Manufacturing Co., Ltd. Antenna having structure for multi-angled reception and mobile terminal including the antenna
US8602310B2 (en) 2010-03-03 2013-12-10 Murata Manufacturing Co., Ltd. Radio communication device and radio communication terminal
US10013650B2 (en) 2010-03-03 2018-07-03 Murata Manufacturing Co., Ltd. Wireless communication module and wireless communication device
US8336786B2 (en) 2010-03-12 2012-12-25 Murata Manufacturing Co., Ltd. Wireless communication device and metal article
US8528829B2 (en) 2010-03-12 2013-09-10 Murata Manufacturing Co., Ltd. Wireless communication device and metal article
US9727765B2 (en) 2010-03-24 2017-08-08 Murata Manufacturing Co., Ltd. RFID system including a reader/writer and RFID tag
US9024837B2 (en) 2010-03-31 2015-05-05 Murata Manufacturing Co., Ltd. Antenna and wireless communication device
US8905316B2 (en) 2010-05-14 2014-12-09 Murata Manufacturing Co., Ltd. Wireless IC device
US9123996B2 (en) 2010-05-14 2015-09-01 Murata Manufacturing Co., Ltd. Wireless IC device
US8424769B2 (en) 2010-07-08 2013-04-23 Murata Manufacturing Co., Ltd. Antenna and RFID device
US9558384B2 (en) 2010-07-28 2017-01-31 Murata Manufacturing Co., Ltd. Antenna apparatus and communication terminal instrument
US8981906B2 (en) 2010-08-10 2015-03-17 Murata Manufacturing Co., Ltd. Printed wiring board and wireless communication system
US8546927B2 (en) 2010-09-03 2013-10-01 Murata Manufacturing Co., Ltd. RFIC chip mounting structure
US8944335B2 (en) 2010-09-30 2015-02-03 Murata Manufacturing Co., Ltd. Wireless IC device
US9166291B2 (en) 2010-10-12 2015-10-20 Murata Manufacturing Co., Ltd. Antenna device and communication terminal apparatus
US9236651B2 (en) 2010-10-21 2016-01-12 Murata Manufacturing Co., Ltd. Communication terminal device
US9761923B2 (en) 2011-01-05 2017-09-12 Murata Manufacturing Co., Ltd. Wireless communication device
US8991713B2 (en) 2011-01-14 2015-03-31 Murata Manufacturing Co., Ltd. RFID chip package and RFID tag
US8757502B2 (en) 2011-02-28 2014-06-24 Murata Manufacturing Co., Ltd. Wireless communication device
US8960561B2 (en) 2011-02-28 2015-02-24 Murata Manufacturing Co., Ltd. Wireless communication device
US8613395B2 (en) 2011-02-28 2013-12-24 Murata Manufacturing Co., Ltd. Wireless communication device
US8797225B2 (en) 2011-03-08 2014-08-05 Murata Manufacturing Co., Ltd. Antenna device and communication terminal apparatus
US8937576B2 (en) 2011-04-05 2015-01-20 Murata Manufacturing Co., Ltd. Wireless communication device
US8740093B2 (en) 2011-04-13 2014-06-03 Murata Manufacturing Co., Ltd. Radio IC device and radio communication terminal
US9378452B2 (en) 2011-05-16 2016-06-28 Murata Manufacturing Co., Ltd. Radio IC device
US8878739B2 (en) 2011-07-14 2014-11-04 Murata Manufacturing Co., Ltd. Wireless communication device
US8770489B2 (en) 2011-07-15 2014-07-08 Murata Manufacturing Co., Ltd. Radio communication device
US8814056B2 (en) 2011-07-19 2014-08-26 Murata Manufacturing Co., Ltd. Antenna device, RFID tag, and communication terminal apparatus
US9543642B2 (en) 2011-09-09 2017-01-10 Murata Manufacturing Co., Ltd. Antenna device and wireless device
US8905296B2 (en) 2011-12-01 2014-12-09 Murata Manufacturing Co., Ltd. Wireless integrated circuit device and method of manufacturing the same
US8720789B2 (en) 2012-01-30 2014-05-13 Murata Manufacturing Co., Ltd. Wireless IC device
US9692128B2 (en) 2012-02-24 2017-06-27 Murata Manufacturing Co., Ltd. Antenna device and wireless communication device
US10235544B2 (en) 2012-04-13 2019-03-19 Murata Manufacturing Co., Ltd. Inspection method and inspection device for RFID tag
JP2014203139A (en) * 2013-04-01 2014-10-27 株式会社ユニバーサルエンターテインメント Storage device of token

Also Published As

Publication number Publication date
JP4720348B2 (en) 2011-07-13

Similar Documents

Publication Publication Date Title
TWI271000B (en) Antenna and RFID tag mounting the same
JP3915092B2 (en) Booster antenna for IC card
CN101897081B (en) Magnetic material antenna and antenna device
EP1772927B1 (en) Antenna unit and noncontact IC tag
JP2006287659A (en) Antenna device
JP4609604B2 (en) Wireless IC device
US8384547B2 (en) Wireless IC device
US20070139285A1 (en) Loop antenna unit and radio communication medium processor
US7280076B2 (en) Information processing apparatus with contactless reader/writer, and coil antenna for magnetic coupling
US9935481B2 (en) Mobile terminal including wireless charging module and battery pack
US8231061B2 (en) Contactless device with miniaturized antenna
JP5685827B2 (en) Magnetic sheet, antenna module and electronic device
US20100314455A1 (en) Wireless ic device
US9001001B2 (en) Communication terminal apparatus and antenna device
CN101568933B (en) Wireless IC device
CN101043222B (en) Systems and methods for enhancing the magnetic coupling in a wireless communication system
JP2010268306A (en) Coil antenna
JP2004213582A (en) Rfid tag, reader/writer and rfid system with tag
JP4883125B2 (en) Antenna
EP2555494B1 (en) Antenna device and communication device
EP1713145A1 (en) Small loop antenna for induction reader/writer
JP5592895B2 (en) RFID antenna circuit
CN1921225B (en) Composite antenna
US8188933B2 (en) Antenna unit and mobile terminal therewith
US9847578B2 (en) Antenna device and communication terminal apparatus

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20080410

RD01 Notification of change of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7421

Effective date: 20091126

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20101221

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110217

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20110308

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20110321

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140415

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140415

Year of fee payment: 3

LAPS Cancellation because of no payment of annual fees