WO2013115019A1 - 無線icデバイス - Google Patents
無線icデバイス Download PDFInfo
- Publication number
- WO2013115019A1 WO2013115019A1 PCT/JP2013/051254 JP2013051254W WO2013115019A1 WO 2013115019 A1 WO2013115019 A1 WO 2013115019A1 JP 2013051254 W JP2013051254 W JP 2013051254W WO 2013115019 A1 WO2013115019 A1 WO 2013115019A1
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- WIPO (PCT)
- Prior art keywords
- wireless
- coil element
- coil
- power feeding
- radiating
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/0701—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips at least one of the integrated circuit chips comprising an arrangement for power management
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
- G06K19/07766—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card comprising at least a second communication arrangement in addition to a first non-contact communication arrangement
- G06K19/07767—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card comprising at least a second communication arrangement in addition to a first non-contact communication arrangement the first and second communication means being two different antennas types, e.g. dipole and coil type, or two antennas of the same kind but operating at different frequencies
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
- G06K19/07773—Antenna details
- G06K19/07777—Antenna details the antenna being of the inductive type
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
- G06K19/07773—Antenna details
- G06K19/07777—Antenna details the antenna being of the inductive type
- G06K19/07779—Antenna details the antenna being of the inductive type the inductive antenna being a coil
- G06K19/07783—Antenna details the antenna being of the inductive type the inductive antenna being a coil the coil being planar
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
- G06K19/07773—Antenna details
- G06K19/07786—Antenna details the antenna being of the HF type, such as a dipole
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- 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
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q20/00—Payment architectures, schemes or protocols
- G06Q20/30—Payment architectures, schemes or protocols characterised by the use of specific devices or networks
- G06Q20/34—Payment architectures, schemes or protocols characterised by the use of specific devices or networks using cards, e.g. integrated circuit [IC] cards or magnetic cards
- G06Q20/341—Active cards, i.e. cards including their own processing means, e.g. including an IC or chip
Definitions
- the present invention relates to a wireless IC device, and more particularly to a wireless IC device used in an RFID (Radio Frequency Identification) system.
- RFID Radio Frequency Identification
- This RFID tag includes a wireless IC chip that stores predetermined information and processes predetermined wireless signals, and an antenna (radiating element) that transmits and receives high-frequency signals, and includes various items to be managed (or packaging thereof). Used by sticking to material).
- an HF band RFID system using a 13 MHz band and a UHF band RFID system using a 900 MHz band are typically known.
- the UHF band RFID system is promising as an article management system because it has a relatively long communication distance (a relatively wide communication area) and can read and write a plurality of tags all at once.
- Patent Documents 1 and 2 describe devices in which a power supply circuit board is interposed between a wireless IC element (wireless IC chip) and an antenna element. Yes.
- a wireless IC element wireless IC chip
- the frequency of the transmission / reception signal is substantially determined by the power supply circuit provided on the power supply circuit board, it is stable without being greatly affected by the size of the antenna element (radiating plate) and its surrounding area. High frequency characteristics can be easily realized.
- the power feeding circuit becomes complicated, and some coil elements and capacitor elements have to be incorporated, and it is necessary to ensure isolation between these elements. For this reason, there is a problem that the feeder circuit board is enlarged.
- An object of the present invention is to provide a wireless IC device capable of realizing a wide frequency band with a small power supply circuit board.
- a wireless IC device which is an embodiment of the present invention is A wireless IC element;
- a power feeding circuit board including a power feeding circuit connected to the wireless IC element, comprising a laminate formed by laminating a plurality of base material layers;
- a radiating element connected to the feeder circuit;
- a wireless IC device comprising:
- the power feeding circuit includes a first coil element connected in series to the wireless IC element, and a second coil element connected in parallel to the wireless IC element, The first coil element and the second coil element are wound so that the winding axis of each coil element is substantially coaxial and the direction of the magnetic field generated in each coil element is reversed. Being placed, It is characterized by.
- the first coil element and the second coil element are arranged such that the winding axes of the first coil element and the second coil element are substantially coaxial, and the direction of the magnetic field generated in each coil element is reversed. Since the coil elements are wound and arranged, the coupling of each coil element is good, a plurality of resonance points are generated, high-frequency signals can be transmitted and received in a wide frequency band, and the number of elements is small, so the feeder circuit board However, the wireless IC device itself is also downsized.
- a wide frequency band can be realized with a small power supply circuit board.
- the wireless IC device which is 1st Example is shown, (A) is sectional drawing, (B) is a top view, (C) is a top view in the state which removed the electric power feeding module. It is the schematic which shows the internal structure of the electric power feeding circuit board which comprises the said wireless IC device. It is an equivalent circuit diagram of the wireless IC device. It is a top view which decomposes
- wireless IC device which is 2nd Example is shown, (A) is a top view, (B) is a top view in the state which removed the electric power feeding module. It is a Smith chart figure which shows the impedance characteristic of the radio
- a wireless IC device 1A according to the first embodiment is used for communication in the UHF band.
- Radiating element 20 (consisting of two radiating portions 21A and 21B and connecting portions 22A and 22B) and a power supply module 30 connected to the radiating element 20 are provided. It is configured as an RFID tag.
- the base sheet 10 preferably has, for example, heat resistance and chemical resistance, and a thermoplastic resin material such as polyimide or PET can be suitably used.
- the radiating element 20 is formed on the base material sheet 10 so as to be flexible by a metal film mainly composed of silver, copper, aluminum, or the like provided on almost the entire surface of the sheet 10.
- the radiating element 20 is divided into two radiating portions 21A and 21B through a gap at the central portion in the long side direction, and connecting portions 22A and 22B are provided facing the gap where the radiating portions 21A and 21B face each other. Yes.
- the power supply module 30 is joined to the connection portions 22A and 22B by a conductive joining material 39 such as solder so as to straddle the gap. That is, the radiating element 20 functions as a dipole radiating element.
- the radiating element 20 may be covered with a resist layer (for example, polyimide resin) (not shown) except for the connection portions 22A and 22B.
- the power supply module 30 includes a power supply circuit board 31 and a wireless IC element (wireless IC chip 50).
- the wireless IC chip 50 includes a memory circuit, a clock circuit, a logic circuit, and the like, and is an integrated circuit element that processes an RF signal. As shown in FIG. 2, the wireless IC chip 50 includes differential input / output electrodes 51A and 51B. Yes.
- the wireless IC chip 50 is formed based on a semiconductor substrate such as silicon. Note that the wireless IC element may be a bare chip IC or a package IC.
- the power supply circuit board 31 incorporates a power supply circuit 33 described below, and the end of the radiating element 20, that is, the connection with the connection portions 22 ⁇ / b> A and 22 ⁇ / b> B which are power supply portions is connected by a conductive bonding material 39 such as solder. They are electrically coupled directly (DC connection).
- the power supply module 30 has a wireless IC chip 50 mounted on a power supply circuit board 31 and the wireless IC chip 50 is sealed with a resin material 55.
- the power feeding circuit board 31 is composed of a laminate 32 formed by laminating a plurality of base material layers (see FIG. 4), and incorporates a power feeding circuit 33 shown in FIGS.
- the power feeding circuit 33 includes a first coil element L1 connected in series to the wireless IC chip 50 and a second coil element L2 connected in parallel to the wireless IC chip 50.
- One end of the first coil element L1 is connected to the electrode 34A, and the electrode 34A is bonded to the input / output electrode 51A of the wireless IC chip 50 via a conductive bonding material 52 such as solder.
- the other end of the first coil element L1 is connected to the input / output electrode 35A via the capacitor element C1, and the input / output electrode 35A is connected to the connection part 22A of the radiation part 21A via the conductive bonding material 39.
- One end of the second coil element L2 is connected to the other end of the first coil element L1 and the capacitor element C1.
- the other end of the second coil element L2 is connected to the electrode 34B, and the electrode 34B is joined to the input / output electrode 51B of the wireless IC chip 50 via the conductive joining material 52.
- the other end of the second coil element L2 is connected to the input / output electrode 35B via the capacitor element C2, and the input / output electrode 35B is connected to the connection part 22B of the radiating part 21B via the conductive bonding material 39.
- the first coil element L1 is connected in series to the differential signal line, and the second coil element L2 is provided between the differential signal lines.
- the first coil element L1 and the second coil element L2 are arranged so that the winding axes of the coil elements L1 and L2 are substantially coaxial, and the directions of the magnetic fields M1 and M2 generated in the coil elements L1 and L2 are They are wound and arranged so as to be opposite to each other.
- each of the coil elements L ⁇ b> 1 and L ⁇ b> 2 is disposed inside the stacked body 32 so that the winding axis thereof is along the stacking direction of the stacked body 32. That is, as shown in FIG. 2, the direction of the magnetic field M1 generated by the current a in the first coil element L1 and the direction of the magnetic field M2 generated by the current b in the second coil element L2 face each other.
- the first coil element L1 and the second coil element L2 are magnetically coupled as indicated by a symbol M, and form a resonance circuit with the capacitor elements C1 and C2.
- This resonance circuit also functions as an impedance matching circuit between the wireless IC chip 50 and the radiating element 20.
- the first coil element L1 is a series inductance component on the wireless IC chip 50 side, and this inductance component has a function of moving impedance mainly in the imaginary axis direction on the impedance chart.
- the second coil element L2 is a series inductance component on the radiating element 20 side, is provided so as to straddle the two connecting portions 22A and 22B of the radiating element 20, and mainly has an impedance on the imaginary axis on the admittance chart. Has the function of moving. As described above, impedances can be efficiently matched by giving the two types of coil elements the roles described above.
- the laminate 32 is obtained by laminating, pressing and firing base layers 41a to 41l made of a dielectric or magnetic material.
- the base material layer constituting the laminate 32 is not limited to ceramic, and may be a thermosetting resin such as a liquid crystal polymer or a resin such as a thermoplastic resin.
- the base material layers 41a to 41l are laminated so that the base material layer 41a is the bottom layer and the base material layer 41l is the top layer.
- Input / output electrodes 35A and 35B are formed on the back surface of the base material layer 41a, and via-hole conductors 61a and 61b are formed.
- Capacitor electrodes 42A, 42B, 43A, 43B, 44A, and 44B are formed on the surfaces of the base material layers 41b, 41c, and 41d, and via-hole conductors 62a, 62b, 63a, and 63b are formed. Via-hole conductors 63a and 63b are formed in the base material layer 41e.
- Conductive lines 45A to 45F are formed on the surface of the base material layers 41f to 41k, and via-hole conductors 63a to 63h are formed.
- Input / output electrodes 34A and 34B and mounting electrodes 34C and 34D are formed on the surface of the base material layer 41l, and via-hole conductors 63g and 63h are formed.
- the power feeding circuit 33 is configured by laminating the above base material layers 41a to 41l. That is, the electrodes 35A and 35B are connected to the capacitor electrodes 42A and 42B via the via-hole conductors 61a and 61b, respectively. Capacitor electrodes 42A and 42B are connected to capacitor electrodes 44A and 44B through via-hole conductors 62a and 62b, respectively. The capacitor electrodes 44A and 44B are connected to one end and the other end of the conductor line 45A through via-hole conductors 63a and 63b, respectively. Capacitor electrodes 43A and 43B are connected to one end and the other end of conductor line 45A through via-hole conductors 63a and 63b, respectively.
- One end of the conductor line 45A is connected to one end of the conductor line 45B via the via-hole conductor 63a, and the other end of the conductor line 45B is connected to one end of the conductor line 45C via the via-hole conductor 63d.
- the other end of the conductor line 45A is connected to one end of the conductor line 45F via the via-hole conductor 63c, and the other end of the conductor line 45F is connected to the input / output electrode 34B via the via-hole conductor 63h.
- Conductor lines 45C, 45D, and 45E are spirally connected through via-hole conductors 63e and 63f, respectively.
- the other end of the conductor line 45E is connected to the input / output electrode 34A via the via-hole conductor 63g.
- the capacitor element C1 is constituted by the capacitor electrodes 42A, 43A, 44A
- the capacitor element C2 is constituted by the capacitor electrodes 42B, 43B, 43C.
- the first coil element L1 is configured by the conductor lines 45C, 45D, and 45E
- the second coil element L2 is configured by the conductor line 45A.
- the wireless IC device 1A when a predetermined high-frequency signal is transmitted from the wireless IC chip 50 to the radiating element 20 via the power feeding circuit 33, it is radiated from the radiating element 20 to the outside as it is. Similarly, when the radiating element 20 receives a high frequency signal from the outside, power is supplied to the wireless IC chip 50 via the power feeding circuit 33. As a result, the wireless IC chip 50 communicates with a reader / writer (not shown).
- the first coil element L1 and the second coil element L2 are positioned so that their winding axes are substantially coaxial, and the directions of the magnetic fields M1, M2 generated in the coil elements L1, L2
- the coil elements L1 and L2 are well coupled, so that a plurality of resonance points are generated and high-frequency signals can be transmitted and received in a wide frequency band.
- the electric power feeding circuit board 31 is reduced in size, and also wireless IC device 1A itself is also reduced in size.
- FIG. 5 shows the communication distance with respect to the frequency in the wireless IC device 1A using the power supply circuit board 31.
- the communication distance is shown as a ratio with the longest distance being 1.
- the actual distance varies depending on the gain of the radiating element 20. Further, a region where impedances of the radiating element 20 and the wireless IC chip 50 are matched is large, and two resonance points X and Y (see FIG. 5) are generated.
- the first coil element L1 mainly functions as an inductance element for impedance matching
- the second coil element L2 mainly functions as an inductance element constituting the power feeding circuit 33. Since the impedance of the imaginary part of the wireless IC chip 50 is large in the negative direction and the impedance of the imaginary part of the radiating element 20 is large in the positive direction, the inductance value of the first coil element L1 is larger than the inductance value of the second coil element L2. Is also preferably large.
- the ratio L1: L2 of the inductance values of the two is more preferably 3: 1 to 4: 1.
- the wireless IC device 1B according to the second embodiment has two radiating portions 21A and 21B of the radiating element 20 in a meander shape, and the other configurations are the same as in the first embodiment. It is. The effect is the same as that of the first embodiment.
- the communication distance with respect to the frequency of the wireless IC device 1B exhibits substantially the same characteristics as in FIG. 5, and the gain is improved by making the radiating portions 21A and 21B have a meander shape, so that the communication distance becomes slightly longer. Furthermore, the impedance characteristics are shown in FIG. In FIG. 7, the A portion is a characteristic at 860 MHz, and the B portion is a characteristic at 960 MHz. As can be seen from the C portion being annular, a large region where the impedances of the radiating element 20 and the wireless IC chip 50 are matched is taken.
- the wireless IC chip 50 is ⁇ 150 to ⁇ 250 ⁇ , and the radiation element 20 is 50 to 400 ⁇ .
- the wireless IC device according to the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the gist.
- the material, shape and size of the base sheet and the radiating element may be appropriately selected according to the application.
- the shape of the radiating element is arbitrary and may be a loop.
- the wireless IC device can be used not only as a tag attached to an article but also as a reader / writer, and can also be used in a wireless communication system other than the RFID system.
- the wireless IC chip may be mounted on another substrate in addition to being mounted on the power supply circuit substrate.
- the radiating element may be configured using a ground conductor provided on the printed wiring board, in addition to being provided exclusively, and in this case, the printed wiring board is a main body of the wireless IC device. Further, the feeder circuit board may be formed by a so-called semiconductor process as a rewiring layer of the wireless IC chip.
- the present invention is useful for a wireless IC device, and is particularly excellent in that a wide frequency band can be realized with a small power supply circuit board.
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Description
無線IC素子と、
複数の基材層を積層してなる積層体からなり、前記無線IC素子に接続された給電回路を含む給電回路基板と、
前記給電回路に接続された放射素子と、
を備えた無線ICデバイスであって、
前記給電回路は、前記無線IC素子に対して直列接続された第1コイル素子と、前記無線IC素子に対して並列接続された第2コイル素子とを含み、
前記第1コイル素子及び前記第2コイル素子は、各コイル素子の巻回軸がほぼ同軸上に位置するように、かつ、各コイル素子に生じる磁界の向きが逆向きになるように、巻回、配置されていること、
を特徴とする。
第1実施例である無線ICデバイス1Aは、UHF帯の通信に用いられるものであり、図1に示すように、可撓性を有する長方形状をなす基材シート10と、該基材シート10の表面に設けられた放射素子20(二つの放射部21A,21Bとそれぞれの接続部22A,22Bとからなる)と、該放射素子20に接続された給電モジュール30と、を備えており、いわゆるRFIDタグとして構成されている。
第2実施例である無線ICデバイス1Bは、図6に示すように、放射素子20の二つの放射部21A,21Bをミアンダ形状としたものであり、他の構成は前記第1実施例と同様である。その作用効果も第1実施例と同様である。
なお、本発明に係る無線ICデバイスは前記実施例に限定するものではなく、その要旨の範囲内で種々に変更することができる。
20…放射素子
30…給電モジュール
31…給電回路基板
32…積層体
33…給電回路
41a~41l…基材層
50…無線ICチップ
L1,L2…コイル素子
C1,C2…コンデンサ素子
Claims (3)
- 無線IC素子と、
複数の基材層を積層してなる積層体からなり、前記無線IC素子に接続された給電回路を含む給電回路基板と、
前記給電回路に接続された放射素子と、
を備えた無線ICデバイスであって、
前記給電回路は、前記無線IC素子に対して直列接続された第1コイル素子と、前記無線IC素子に対して並列接続された第2コイル素子とを含み、
前記第1コイル素子及び前記第2コイル素子は、各コイル素子の巻回軸がほぼ同軸上に位置するように、かつ、各コイル素子に生じる磁界の向きが逆向きになるように、巻回、配置されていること、
を特徴とする無線ICデバイス。 - 前記第1コイル素子及び前記第2コイル素子は、各コイル素子の巻回軸が前記基材層の積層方向に沿うように前記積層体の内部に配置されていること、を特徴とする請求項1に記載の無線ICデバイス。
- 前記給電回路は、前記第2コイル素子の両端部と前記放射素子との間にそれぞれ接続された第1コンデンサ素子及び第2コンデンサ素子を含み、
前記第2コイル素子と前記第1及び第2コンデンサ素子とで共振回路が構成されていること、
を特徴とする請求項1又は請求項2に記載の無線ICデバイス。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020137023537A KR20130105938A (ko) | 2012-01-30 | 2013-01-23 | 무선 ic 디바이스 |
| JP2013526258A JP5354137B1 (ja) | 2012-01-30 | 2013-01-23 | 無線icデバイス |
| EP13742949.4A EP2688145A1 (en) | 2012-01-30 | 2013-01-23 | Wireless ic device |
| CN201380000854.3A CN103430382B (zh) | 2012-01-30 | 2013-01-23 | 无线ic器件 |
| US14/011,823 US8720789B2 (en) | 2012-01-30 | 2013-08-28 | Wireless IC device |
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| JP2012-016067 | 2012-01-30 | ||
| JP2012016067 | 2012-01-30 |
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| US14/011,823 Continuation US8720789B2 (en) | 2012-01-30 | 2013-08-28 | Wireless IC device |
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| WO2013115019A1 true WO2013115019A1 (ja) | 2013-08-08 |
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|---|---|
| US (1) | US8720789B2 (ja) |
| EP (1) | EP2688145A1 (ja) |
| JP (1) | JP5354137B1 (ja) |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP5354137B1 (ja) | 2013-11-27 |
| EP2688145A1 (en) | 2014-01-22 |
| US20130341415A1 (en) | 2013-12-26 |
| JPWO2013115019A1 (ja) | 2015-05-11 |
| KR20130105938A (ko) | 2013-09-26 |
| CN103430382A (zh) | 2013-12-04 |
| US8720789B2 (en) | 2014-05-13 |
| CN103430382B (zh) | 2015-07-15 |
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