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WO2007017944A1 - Antenne - Google Patents

Antenne Download PDF

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Publication number
WO2007017944A1
WO2007017944A1 PCT/JP2005/014690 JP2005014690W WO2007017944A1 WO 2007017944 A1 WO2007017944 A1 WO 2007017944A1 JP 2005014690 W JP2005014690 W JP 2005014690W WO 2007017944 A1 WO2007017944 A1 WO 2007017944A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
rfid
length
degrees
approximately
Prior art date
Application number
PCT/JP2005/014690
Other languages
English (en)
Japanese (ja)
Inventor
Hisao Tanabe
Original Assignee
Hitachi, Ltd.
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 Hitachi, Ltd. filed Critical Hitachi, Ltd.
Priority to PCT/JP2005/014690 priority Critical patent/WO2007017944A1/fr
Priority to JP2007529456A priority patent/JPWO2007017967A1/ja
Priority to PCT/JP2006/304052 priority patent/WO2007017967A1/fr
Priority to TW095107240A priority patent/TW200707306A/zh
Publication of WO2007017944A1 publication Critical patent/WO2007017944A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
    • H01Q9/285—Planar dipole
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
    • H01Q1/2225—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/22—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of a single substantially straight conductive element
    • H01Q19/24—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of a single substantially straight conductive element the primary active element being centre-fed and substantially straight, e.g. H-antenna

Definitions

  • the present invention relates to an antenna, and more particularly to a technique effective when applied to an antenna for RFID (Radio Frequency Identification).
  • RFID Radio Frequency Identification
  • a system using RFID will be described as an example of using a wireless communication device.
  • a system using RFID is composed of an interrogator having a read or read / write function and a responder called a wireless tag.
  • batteryless tags that detect transmission radio waves from interrogators and use them as drive power have appeared, and various applications are being studied in many fields.
  • a system using RFID can be easily configured, it can automatically manage or sort items such as product management in a production line or warehouse or store, automatic sorting of items, postal delivery, and home delivery.
  • a wide range of distribution / distribution fields such as classification confirmation, etc. are being considered for application in these fields.
  • Patent Document 1 discloses an article management system as shown in FIG.
  • the common radio wave reflector 94 is separated from the wireless tag 93 by a distance L in parallel with the wireless tag 93 as a responder.
  • the signal from the interrogator is reflected by the common radio wave reflector 94, thereby increasing the electric field strength of the radio wave to the radio tag 93 as the responder.
  • Patent Document 1 Japanese Patent Laid-Open No. 2004-250185
  • an object of the present invention is to provide a technology capable of extending the communication range and expanding the range of use in an RFID antenna.
  • the antenna according to the present invention has a shape in which a dipole antenna, which is a first antenna, is combined with a second antenna having an angle that is not parallel or perpendicular.
  • the first antenna and the second antenna that are combined may be insulated or integrated.
  • the dipole antenna which is the first antenna
  • the dipole antenna is combined with a second antenna that is not parallel or at a right angle but a third antenna that is parallel to the first antenna.
  • the first antenna, the second antenna, and the third antenna that are combined may be all insulated or may be partly or entirely integrated.
  • the first antenna that is a loop antenna and the second antenna that is not parallel or at a right angle but a certain angle are combined in a supply line on which RFID is mounted.
  • a signal is supplied by providing a supply line on which RFID is mounted inside the loop antenna which is the first antenna.
  • the communication distance of the antenna can be extended.
  • FIG. 1 is a plan view showing the shape of a two-configuration antenna according to Embodiment 1 of the present invention.
  • FIG. 2 is a diagram showing a measurement result of a two-configuration antenna according to Embodiment 1 of the present invention.
  • FIG. 3 is a plan view showing the shape of a three-configuration antenna according to Embodiment 2 of the present invention.
  • FIG. 4 is a diagram showing a measurement result of a three-configuration antenna according to Embodiment 2 of the present invention.
  • FIG. 5 is a plan view showing a shape of a modified loop antenna according to a third embodiment of the present invention.
  • FIG. 6 is a diagram showing a measurement result of the modified loop antenna according to the third embodiment of the present invention.
  • FIG. 7 is a plan view showing the shape of a supply antenna in a loop antenna according to a fourth embodiment of the present invention.
  • FIG. 8 is a diagram showing a measurement result of a supply antenna in a loop antenna according to a fourth embodiment of the present invention.
  • FIG. 9 is a diagram showing a basic configuration of an RFID system to which an antenna according to the present invention is applied.
  • FIG. 10 is a perspective view showing an antenna configuration of the article management system disclosed in Patent Document 1.
  • FIG. 11] (1) to (5) are diagrams showing a manufacturing method of a two-configuration antenna having an insulating structure in the first embodiment of the present invention.
  • FIG. 12] (1) to (3) are diagrams showing a method for manufacturing an integral two-component antenna in the first embodiment of the present invention.
  • FIG. 9 shows a basic configuration of a system using RFID to which the antenna according to the present invention is applied.
  • the system using RFID includes an interrogator 91, an antenna 92, and a wireless tag (RFID tag) 93 using a dipole antenna.
  • the signal from the interrogator 91 is transmitted as a radio wave from the antenna 92 connected to the interrogator 91.
  • the signal transmitted from the antenna 92 is received by the antenna of the wireless tag 93 existing in the radio wave area.
  • the radio tag 93 detects the received signal, operates the RFID internal circuit as an internal power source, Information written inside is transmitted as radio waves.
  • the signal transmitted from the wireless tag 93 is received by the antenna 92 of the interrogator 91, and the HD information is demodulated.
  • the wireless tag 93 is also configured with force such as an RFID chip and an antenna.
  • force such as an RFID chip and an antenna.
  • the antenna applied to this wireless tag will be described below.
  • FIG. 1 is a plan view showing the shape of a two-configuration antenna according to the first embodiment of the present invention
  • FIG. 2 is a diagram showing the measurement results of the two-configuration antenna according to the first embodiment.
  • the two-configuration antenna 1 of the first embodiment is, for example, an RFI D antenna that transmits and receives circularly polarized radio waves, and includes a dipole antenna (first antenna) 12 and an antenna (second antenna) 13.
  • the force is composed.
  • a two-configuration antenna 1 has a shape in which an antenna 13 is arranged at an angle other than parallel or perpendicular to a dipole antenna 12 connected to an RFID chip 11 and resonating with a communication carrier frequency.
  • the dipole antenna 12 and the antenna 13 may be insulated or may be integrated.
  • the material of the dipole antenna 12 and the antenna 13 is aluminum, copper or the like.
  • the antenna 13 serves as a director in the Yagi antenna.
  • a conductor When a conductor is placed in an electromagnetic field, current is induced and radiated without direct power supply. This is called a non-powered element and is practically used as a director or reflector.
  • the director has a conductor that is shorter than half the wavelength of the communication carrier frequency. A current with a phase lag is excited in this conductor, and the current that is also emitted from this conductor is in phase with the initial current.
  • the antenna of the present invention uses circularly polarized waves.
  • circularly polarized waves When circularly polarized waves are fed to two orthogonal antennas with a phase difference of 90 degrees, both electromagnetic waves and electric fields change with time. This is called circular polarization because the locus of the electric field is a circle.
  • the circularly polarized signal 14 transmitted from the interrogator antenna is amplified by the antenna 13, and the amplified signal wave 14a is received by the dipole antenna 12. Become.
  • the length (L) of the dipole antenna 12 is preferably around ⁇ / 2.3 in the range of ⁇ 2 to ⁇ / 3, assuming the wavelength of the communication carrier. This is determined by the shortening rate due to the effect of the dielectric constant of the film because the dipole antenna is deposited on the film, and ⁇ ⁇ 2 when an epoxy resin composition film with a dielectric constant of 1.96 is adopted. . 3 Therefore, for example, when an RFID chip having a chip size of 0.5 mm square or less is used, the length of the dipole antenna 12 is 52 mm.
  • the length (L) of the antenna 13 is preferably about ⁇ / 2.8 in the range of ⁇ 2 to ⁇ ⁇ 4.
  • the combined angle ( ⁇ ) of the dipole antenna 12 and the antenna 13 is in the range of 45 to 85 degrees, and is preferably around 80 degrees. The basis for these numbers is explained using Figure 2.
  • FIG. 2 shows a measurement result when an RFID chip having a feature that the chip size of the two-configuration antenna 1 according to the first embodiment is 0.5 mm square or less is used.
  • the communication distance 26, which is the measurement result of the two-component antenna in a configuration in which the dipole antenna 12 and the antenna 13 are insulated, represents the distance from the antenna on the interrogator side to the wireless tag (two-component antenna 1), and the unit is cm (centimeter).
  • Angle 27 indicates the angle ( ⁇ ) between the dipole antenna 12 and the antenna 13, and the left force is 90 degrees, 80 degrees, 70 degrees, 60 degrees, 50 degrees, and 40 degrees.
  • the unit characteristic 21 shows the result of measuring the dipole antenna 12 alone. From the scale of the communication distance 26, the performance of the dipole antenna 12 alone is 68cm.
  • Antenna length 50 mm (millimeter) Characteristic 22 is that the length (L) of the antenna 13 is ⁇ / 2.
  • the separation is falling.
  • the length (L) of the antenna 13 is 45mm (Z2.7) force 40mm (Z
  • the combination angle ( ⁇ ) between the dipole antenna 12 and the antenna 13 should be around 80 degrees.
  • FIG. 11 shows a manufacturing method of the two-configuration antenna 1 when the dipole antenna 12 and the antenna 13 are insulated.
  • the two-configuration antenna 1 is manufactured in the following order of steps (1) to (5).
  • the dipole antenna 12 is deposited on the film 15.
  • the antenna 13 is deposited.
  • the insulating film 17 is applied to the antenna 13 to complete.
  • the manufacturing unit price increases due to the increased number of processes. If you want to manufacture at a low cost, the communication distance will be slightly reduced, but it is desirable to have an integrated structure.
  • FIG. 12 shows a manufacturing method of the two-component antenna 1 when the dipole antenna 12 and the antenna 13 are manufactured in an integral structure.
  • the two-piece antenna 1 with a single structure has the following (1) to (3
  • a monolithic antenna 18 of a dipole antenna 12 and an antenna 13 is deposited on the film 15.
  • (2) Connect RFID chip 11 to body structure antenna 18.
  • (3) The insulating film 19 is applied to the body structure antenna 18 to complete.
  • a communication distance of about 1.4 times that of the conventional antenna can be obtained.
  • FIG. 3 is a plan view showing the shape of the three-configuration antenna according to the second embodiment of the present invention
  • FIG. 4 is a diagram showing the measurement results of the three-configuration antenna according to the second embodiment.
  • the three-configuration antenna 3 of the second embodiment is, for example, an RFI D antenna that transmits and receives circularly polarized radio waves, and includes a dipole antenna (first antenna) 12 and an antenna (second antenna) 13.
  • the parallel antenna (third antenna) 31 is configured.
  • the three-configuration antenna 3 is configured such that an antenna 13 is disposed at an angle not parallel or perpendicular to a dipole antenna 12 connected to the RFID chip 11 and resonating with a communication carrier frequency.
  • the shape consists of a parallel antenna 31 parallel to the dipole antenna 12.
  • the dipole antenna 12, the antenna 13, and the parallel antenna 31 may be insulated or partially integrated.
  • the partially integrated structure means that the dipole antenna 12 and the antenna 13 or the antenna 13 and the parallel antenna 31 are integrated.
  • the manufacturing method of the three-component antenna 3 is the same as that of the two-component antenna according to the first embodiment, in which a dipole antenna 12 is vapor-deposited on a substrate or a film and an insulating film is applied. Then, the antenna 13 is vapor-deposited, and then an insulating film is applied, and then the parallel antenna 31 is vapor-deposited.
  • the manufacturing unit price increases. Therefore, if you want to manufacture at a low cost, the communication distance will be slightly reduced, but it is desirable to have an integrated structure.
  • the dipole antenna 12 and the antenna 13, or the antenna 13 and the parallel antenna 31 are combined, or the dipole antenna 12, the antenna 13 and the parallel antenna 31 are combined. Vapor deposition may be performed on a substrate or a film.
  • the length (L) of the dipole antenna 12 is preferably about ⁇ / 2.3 in the range of ⁇ 2 to ⁇ 3. This is determined by the shortening rate due to the influence of the dielectric constant of the film because the dipole antenna is deposited on the film.
  • the length (L) of the antenna 13 is preferably in the range of ⁇ ⁇ 2 to ⁇ ⁇ 4 and around ⁇ /2.8.
  • the combination angle ( ⁇ ) between the dipole antenna 12 and the antenna 13 ranges from 55 degrees to 85 degrees. Around 80 degrees is desirable.
  • the values of the length of dipole antenna 12 (L and the length of antenna 13 (L), and the combined angle of dipole antenna 12 and antenna 13 ( ⁇ )) are desirable.
  • the three-component antenna of the second embodiment is a combination of the two-component antenna and a parallel antenna 31.
  • the length (L) of the parallel antenna 31 is in the range of ⁇ ⁇ 2 to ⁇ ⁇ 3
  • FIG. 4 shows a measurement result when an RFID chip having a feature that the chip size of the three-configuration antenna 3 of the second embodiment is 0.5 mm square or less is used.
  • This is a measurement result of a three-component antenna in a configuration in which a dipole antenna 12, an antenna 13, and a parallel antenna 31 are insulated.
  • the communication distance 26 represents the distance from the interrogator antenna to the wireless tag (3 antennas 3), and the unit is cm.
  • the unit characteristic 21 shows the measurement result of the dipole antenna 12 alone. From the scale of the communication distance 26, the performance of the dipole antenna 12 alone is 68 cm.
  • the dual antenna characteristic 41 shows the optimum value with the dual antenna described in FIG. 2, and is 98 cm from the scale of the communication distance 26.
  • a position (Dx) 45 indicates a lateral distance between the dipole antenna 12 and the parallel antenna 31.
  • a vertical position (Dy) 46 indicates a vertical distance between the dipole antenna 12 and the parallel antenna 31.
  • the parallel antenna 50mm characteristic 42 indicates that the length (L) of the parallel antenna 31 is
  • the measurement result at 50 mm is shown. From this measurement result, the position of the parallel antenna 31 from the dipole antenna 12 is 30 mm and 40 mm in the horizontal direction (Dx), and the communication distance force is 104 cm at the position of the vertical position (Dy) force S 30 mm.
  • the parallel antenna 45 mm characteristic 43 shows the measurement result when the length (L) of the parallel antenna 31 is 45 mm. This measurement
  • the parallel antenna 31 has a length (L) force of S50mm and a lateral (Dx) force of S30mm and 40mm.
  • the vertical position (Dy) is 30 mm.
  • FIG. 5 is a plan view showing the shape of the modified loop antenna according to the third embodiment of the present invention
  • FIG. 6 is a diagram showing the measurement results of the modified loop antenna according to the third embodiment.
  • the modified loop antenna 5 of the third embodiment is, for example, an RFID antenna that transmits and receives circularly polarized radio waves, and includes a loop antenna (first antenna) 51, an antenna (second antenna) 52, and a supply line. It is composed of 53 forces.
  • the modified loop antenna 5 is connected by a supply line 53 that connects a loop antenna 51 that resonates with a communication carrier frequency and an antenna 52 that is arranged at an angle that is not parallel or perpendicular to the RFID chip 11. It has a shape.
  • the size of the loop antenna 51 is ⁇ ⁇ 6 in the horizontal (Lx) and ⁇ 4 in the vertical (Ly).
  • the length (L) of the antenna 52 is ⁇
  • the angle ( ⁇ ) between the supply line 53 and the antenna 52 is in the range of 30 to 60 degrees, and a position of 40 degrees or 60 degrees from the 35 degrees force is desired.
  • FIG. 6 shows the measurement results of the modified loop antenna of the third embodiment.
  • the communication distance 26 represents the distance from the antenna on the interrogator side to the wireless tag (modified loop antenna 5), and the unit is cm.
  • the unit characteristic 21 shows the result of measurement with the dipole antenna 12 alone, and the communication distance is 68 cm.
  • the angle ( ⁇ ) 62 depends on the supply line 53 and the key
  • the angle of the antenna 52 was shown, and the 30 degree force was also measured in the 60 degree range. However, since measurement data was not obtained at the 30 degree position, the 35 degree position was measured and tracked. At this time, the loop antenna 51 and the antenna 52 overlap each other at a position of 30 degrees. From the measurement result 61 of this deformed loop antenna, the angle ( ⁇ ) is 35 degrees, force is 40 degrees, or 60 degrees.
  • the communication distance is 94cm, which is the best point.
  • FIG. 7 is a plan view showing the shape of the antenna supplied in the loop antenna according to the fourth embodiment of the present invention
  • FIG. 8 is a diagram showing the measurement result of the antenna supplied in the loop antenna according to the fourth embodiment.
  • the supply antenna 7 in the loop antenna according to the fourth embodiment is, for example, an RFID antenna that transmits and receives circularly polarized radio waves, and includes a force such as a loop antenna (first antenna) 51 and a supply line 72. Yes.
  • the supply antenna 7 in the loop antenna has a shape in which a supply line 72 attached with the RFID chip 11 is connected to the inside of the loop antenna 71.
  • the vertical length (Ly) is fixed at 60mm, which is ⁇ 2, but the horizontal length (Lx) is in the range of ⁇ 6 to ⁇ 3.
  • Supply line position (L) 73 is in the range of ⁇ ⁇ 2.4 to ⁇ ⁇ 3, for example,
  • FIG. 8 shows the measurement results when the RFID chip having the feature that the chip size of the antenna supplied in the loop antenna of the fourth embodiment is 0.5 mm square or less is used.
  • the communication distance 26 represents the distance from the antenna on the interrogator side to the wireless tag (supplied antenna 7 in the loop antenna), and its unit is cm.
  • the unit characteristic 21 shows the result of measurement with the dipole antenna 12 alone, and the communication distance is 68 cm.
  • the supply line position 82 indicates the measured position of the supply line position (L) 73 shown in FIG. loop
  • the position of the supply line (L) is about 42.5 mm.
  • the force described for RFID is not limited to this, and can be applied to antennas of other communication systems.
  • a system using RFID to which the antenna according to the present invention is applied has a simple configuration. Wide range of distribution and logistics fields such as product management, automatic sorting of goods, automatic sorting of mail delivery and home delivery, etc., or confirmation of sorting classification in production lines or warehouses and stores! Application in the field is being considered!

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  • Details Of Aerials (AREA)
  • Aerials With Secondary Devices (AREA)
  • Support Of Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

L'invention concerne une technique destinée à agrandir la plage d'utilisation d'une antenne destinée à un identificateur RFID en étendant la distance de communication de l'antenne. Une antenne à deux éléments (1) est constituée en plaçant une antenne (13) en parallèle à une antenne dipôle (12) ou à un angle autre qu'un angle droit par rapport à celle-ci, laquelle est reliée à une puce d'identificateur RFID (11) et résonne à la fréquence de la porteuse de communication. L'antenne dipôle (12) présente une longueur dans la plage allant de λ/2 à λ/3, de préférence λ/2,3 ou environ λ/2,3. L'antenne (13) présente une longueur dans la plage allant de λ/2 to λ/4, de préférence λ/2,8 ou environ λ/2,8. L'angle de combinaison de l'antenne dipôle (12) et de l'antenne (13) se trouve dans la plage allant de 45° à 85°, de préférence 80° ou environ 80°.
PCT/JP2005/014690 2005-08-10 2005-08-10 Antenne WO2007017944A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PCT/JP2005/014690 WO2007017944A1 (fr) 2005-08-10 2005-08-10 Antenne
JP2007529456A JPWO2007017967A1 (ja) 2005-08-10 2006-03-03 無線ｉｃタグ
PCT/JP2006/304052 WO2007017967A1 (fr) 2005-08-10 2006-03-03 Etiquette sans fil a circuit integre
TW095107240A TW200707306A (en) 2005-08-10 2006-03-03 Wireless IC tag

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2005/014690 WO2007017944A1 (fr) 2005-08-10 2005-08-10 Antenne

Publications (1)

Publication Number Publication Date
WO2007017944A1 true WO2007017944A1 (fr) 2007-02-15

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PCT/JP2005/014690 WO2007017944A1 (fr) 2005-08-10 2005-08-10 Antenne
PCT/JP2006/304052 WO2007017967A1 (fr) 2005-08-10 2006-03-03 Etiquette sans fil a circuit integre

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Application Number Title Priority Date Filing Date
PCT/JP2006/304052 WO2007017967A1 (fr) 2005-08-10 2006-03-03 Etiquette sans fil a circuit integre

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JP (1) JPWO2007017967A1 (fr)
TW (1) TW200707306A (fr)
WO (2) WO2007017944A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5267463B2 (ja) * 2008-03-03 2013-08-21 株式会社村田製作所 無線ｉｃデバイス及び無線通信システム
CN104567948A (zh) * 2015-01-19 2015-04-29 山西大学 一种采用无线射频技术识别的电阻型传感器

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JP4824649B2 (ja) * 2007-08-13 2011-11-30 トッパン・フォームズ株式会社 アンテナ部材
KR101330363B1 (ko) 2010-09-17 2013-11-15 한국전자통신연구원 우편물 배송 서비스 측정을 위한 지향성 ｒｆｉｄ 라벨 태그

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JP2001345636A (ja) * 2000-06-06 2001-12-14 Ngk Insulators Ltd アンテナ装置
JP2004511156A (ja) * 2000-10-03 2004-04-08 マルコニ　コーポレイション　パブリック　リミテッド　カンパニー 多重帯域無線通信装置
JP2005094474A (ja) * 2003-09-18 2005-04-07 Sharp Corp マルチタグ及びマルチタグを利用したｒｆｉｄシステム
JP2005134942A (ja) * 2003-10-28 2005-05-26 Mitsubishi Materials Corp Ｒｆｉｄリーダ／ライタ及びアンテナの構造

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Publication number Priority date Publication date Assignee Title
JP2001345636A (ja) * 2000-06-06 2001-12-14 Ngk Insulators Ltd アンテナ装置
JP2004511156A (ja) * 2000-10-03 2004-04-08 マルコニ　コーポレイション　パブリック　リミテッド　カンパニー 多重帯域無線通信装置
JP2005094474A (ja) * 2003-09-18 2005-04-07 Sharp Corp マルチタグ及びマルチタグを利用したｒｆｉｄシステム
JP2005134942A (ja) * 2003-10-28 2005-05-26 Mitsubishi Materials Corp Ｒｆｉｄリーダ／ライタ及びアンテナの構造

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Title
CHEN K.M. AND KING R.W.P.: "Dipole antennas coupled electromagnetically to a two-wire transmission line, I.R.E. transactions on antennas and propagation, AP-9 - 5", (AMERICA) THE INSTITUTE OF RADIO ENGINEERS, September 1961 (1961-09-01), pages 425 - 432 *
THE INSTITUTE OF ELECTRONICS: "Information and Communication Engineers, Antenna Kogaku Handbook", vol. 1ST ED., 30 October 1980, pages: 412 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5267463B2 (ja) * 2008-03-03 2013-08-21 株式会社村田製作所 無線ｉｃデバイス及び無線通信システム
US8797148B2 (en) 2008-03-03 2014-08-05 Murata Manufacturing Co., Ltd. Radio frequency IC device and radio communication system
CN104567948A (zh) * 2015-01-19 2015-04-29 山西大学 一种采用无线射频技术识别的电阻型传感器

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WO2007017967A1 (fr) 2007-02-15
TW200707306A (en) 2007-02-16
JPWO2007017967A1 (ja) 2009-02-19

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