WO2017014152A1 - 無線通信デバイスおよびそれを備えた物品 - Google Patents
無線通信デバイスおよびそれを備えた物品 Download PDFInfo
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- WO2017014152A1 WO2017014152A1 PCT/JP2016/070862 JP2016070862W WO2017014152A1 WO 2017014152 A1 WO2017014152 A1 WO 2017014152A1 JP 2016070862 W JP2016070862 W JP 2016070862W WO 2017014152 A1 WO2017014152 A1 WO 2017014152A1
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- WIPO (PCT)
- Prior art keywords
- wireless communication
- communication device
- radiation electrode
- radiation
- electrode
- Prior art date
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—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
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR 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
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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
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- 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
- H01Q9/0485—Dielectric resonator antennas
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- 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
- H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength
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- 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
Definitions
- the present invention relates to a wireless communication device, in particular, a wireless communication device capable of wireless communication even when attached to a metal surface of an article, and an article provided with the same.
- Patent Document 1 discloses a wireless communication device capable of wireless communication even when attached to a metal surface of an article.
- the wireless communication device described in Patent Document 1 is configured by winding a strip-shaped metal member such as an aluminum foil around a rectangular parallelepiped dielectric member. Thereby, a radiator is provided on the upper surface and the lower surface of the dielectric member.
- the wireless communication device is attached to the metal surface of the article such that the radiator on the lower surface side of the dielectric member faces the metal surface of the article. Due to such a structure, the stray capacitance between the radiator on the upper surface side and the radiator on the lower surface side of the dielectric member is substantially the same as that before being attached to the article even when attached to the metal surface of the article. does not change. Therefore, even when attached to the metal surface of the article, the wireless communication device can perform wireless communication in the same manner as before being attached to the article.
- the thickness of the dielectric member is reduced to reduce the thickness, the distance between the radiator on the upper surface side and the radiator on the lower surface side is decreased, and the stray capacitance therebetween is increased.
- the stray capacitance increases, a large amount of current flowing through the radiator is consumed for forming an electric field in the stray capacitance, and as a result, the radiation efficiency of radio waves from the radiator decreases. That is, the communication distance of the wireless communication device is shortened.
- an object of the present invention is to reduce the thickness of a wireless communication device capable of wireless communication even when attached to a metal surface of an article while suppressing a decrease in the communicable distance.
- a wireless communication device that can be used while attached to a metal surface of an article, A dielectric member comprising an attachment surface attached to the metal surface of the article; An RFIC element provided on the dielectric member and comprising first and second terminal electrodes; A first radiation electrode provided on the dielectric member so as to face the metal surface of the article in parallel with a predetermined distance, and connected to a first terminal electrode of the RFIC element; The dielectric member is provided so as to face the metal surface of the article in parallel with the predetermined distance, and in a state independent of the first radiation electrode, the second of the RFIC element A second radiation electrode connected to the terminal electrode, The first and second radiation electrodes extend in directions intersecting each other; A wireless communication device is provided in which the first radiation electrode has a smaller width and a shorter length in the extending direction than the second radiation electrode.
- An article comprising a metal surface at least in part and having a wireless communication device attached to the metal surface,
- the wireless communication device is A dielectric member comprising an attachment surface attached to the metal surface of the article;
- An RFIC element provided on the dielectric member and comprising first and second terminal electrodes;
- a first radiation electrode provided on the dielectric member so as to face the metal surface of the article in parallel with a predetermined distance, and connected to a first terminal electrode of the RFIC element;
- the dielectric member is provided so as to face the metal surface of the article in parallel with the predetermined distance, and in a state independent of the first radiation electrode, the second of the RFIC element
- the first and second radiation electrodes extend in directions intersecting each other;
- An article is provided in which the first radiation electrode has a smaller width and a shorter length in the extending direction than the second radiation electrode.
- a wireless communication device capable of wireless communication even when attached to a metal surface of an article can be thinned while suppressing a decrease in communication distance.
- wireless communication device which concerns on one embodiment of this invention of the state attached to the articles
- the perspective view which shows the internal structure of the RFIC element shown in FIG. Top view of the upper insulating layer in the RFIC element configured as a multilayer substrate
- FIG. 7A Sectional drawing of the central insulating layer along the line B2-B2 shown in FIG. 7B Sectional drawing of the lower insulating layer along line B3-B3 shown in FIG. 7C
- goods The figure which shows the radio
- FIG. 17 is a cross-sectional view of the wireless communication device shown in FIG.
- FIG. 19 is a cross-sectional view of the wireless communication device shown in FIG. Cross-sectional view of an even different wireless communication device
- FIG. 17 is a cross-sectional view of a wireless communication device according to still another embodiment
- FIG. 19 is a cross-sectional view of the wireless communication device shown in FIG. Cross-sectional view of an even different wireless communication device
- a wireless communication device is a wireless communication device that can be used in a state of being attached to a metal surface of an article, the dielectric member including an attachment surface attached to the metal surface of the article, and the dielectric
- An RFIC element provided on the body member and provided with the first and second terminal electrodes, and provided on the dielectric member so as to face the metal surface of the article in parallel with a predetermined distance, the RFIC element
- a first radiating electrode connected to a first terminal electrode of the element and the dielectric member so as to face the metal surface of the article at a predetermined distance in parallel
- a second radiation electrode connected to the second terminal electrode of the RFIC element in a state independent of the first radiation electrode, and the first and second radiation electrodes intersect with each other. Extending in the direction, Serial first radiation electrode, as compared to the second radiation electrode, a short small width and extending direction length.
- a wireless communication device capable of wireless communication even when attached to a metal surface of an article can be thinned while suppressing a decrease in communication distance.
- the wireless communication device may have a conductive layer provided on the mounting surface of the dielectric member in a state independent of the first and second radiation electrodes. Accordingly, the wireless communication device can exhibit uniform communication characteristics regardless of the surface shape of the metal surface attached to the article.
- the length in the extending direction of the first radiation electrode may be equal to the width of the second radiation electrode.
- the second radiating electrode may include a current concentrating portion whose cross-sectional area perpendicular to the extending direction is smaller than other portions.
- the second radiation electrode can be shortened while realizing a sufficient communication distance, and as a result, the wireless communication device can be made compact.
- the second radiation electrode may include a first cutout portion provided at one end in the width direction and extending toward the center in the width direction. Thereby, the bandwidth of the communication frequency of the wireless communication device can be expanded.
- the second radiation electrode includes a second notch provided at the other end in the width direction and extending toward the center in the width direction.
- the first cutout portion and the second cutout portion are arranged at intervals in the extending direction of the second radiation electrode.
- the RFIC element includes a first coil connected to the first terminal electrode, and a second coil connected to the second terminal electrode, and the first terminal electrode is the RFIC element.
- the RFIC element, the first radiation electrode, and the second radiation electrode are connected so that a land portion of the second radiation electrode exists.
- the dielectric member may include a recess at a position facing a corner of the first and second radiation electrodes.
- the predetermined distance is, for example, not less than 0.2 mm and not more than 1 mm.
- An article according to another aspect of the present invention is an article that has a metal surface at least partially and has a wireless communication device attached to the metal surface, wherein the wireless communication device is attached to a metal surface of the article.
- a dielectric member having a surface, an RFIC element provided on the dielectric member and having first and second terminal electrodes, and facing the metal surface of the article in parallel with a predetermined distance.
- the first radiation electrode provided on the dielectric member and connected to the first terminal electrode of the RFIC element is opposed to the metal surface of the article in parallel with the predetermined distance.
- a second radiation electrode provided on the dielectric member and connected to the second terminal electrode of the RFIC element in a state independent of the first radiation electrode, and the first radiation electrode And second release Electrodes extend in a direction crossing each other, the first radiation electrode, as compared to the second radiation electrode, a short small width and extending direction length.
- a wireless communication device capable of wireless communication even when attached to a metal surface of an article can be thinned while suppressing a decrease in communication distance. Accordingly, an article having a wireless communication device is also thinned.
- FIG. 1 is a perspective view of a wireless communication device according to an embodiment of the present invention attached to an article.
- FIG. 2 is a top view of the wireless communication device
- FIG. 3 is a cross-sectional view of the wireless communication device.
- an XYZ coordinate system having an X axis, a Y axis, and a Z axis that are orthogonal to each other is shown in order to facilitate understanding of the invention.
- the Z-axis direction is the thickness direction of the wireless communication device
- the X-axis direction is the width direction
- the Y-axis direction is the length direction.
- a wireless communication device 10 shown in FIG. 1 is an RFID (Radio Frequency Identification) tag that performs wireless communication in a UHF band, for example, a carrier frequency of 900 MHz, and is used by being attached to various articles G.
- the wireless communication device 10 according to the present embodiment is configured to be capable of wireless communication even when attached to the metal surface Ga (for example, a metal body) of the article G.
- the wireless communication device 10 includes a dielectric member (dielectric substrate) 12 and first and second radiation electrodes 14 and 16 provided on the main surface 12 a of the dielectric substrate 12. .
- the wireless communication device 10 also includes an RFIC (Radio Frequency Integrated Circuit) element 100 provided on the main surface 12 a of the dielectric substrate 12.
- RFIC Radio Frequency Integrated Circuit
- the dielectric substrate 12 of the wireless communication device 10 has a rectangular shape in plan view including a main surface 12a and a back surface (mounting surface) 12b facing the main surface 12a in parallel.
- the plate has a uniform thickness.
- the dielectric substrate 12 is also made of a dielectric material having a low dielectric constant (preferably a relative dielectric constant of 10 or less).
- the dielectric substrate 12 is made of a flexible dielectric material such as polyethylene terephthalate (PET), fluorine resin, urethane resin, paper, and the like.
- PET polyethylene terephthalate
- fluorine resin fluorine resin
- urethane resin urethane resin
- paper and the like.
- the dielectric substrate 12 may be made of a magnetic material.
- the first radiation electrode 14, the second radiation electrode 16, and the RFIC element 100 are provided on the main surface 12 a side of the dielectric substrate 12.
- the attachment surface 12b is not provided with electrodes or the like as shown in FIG. 3, and functions as means for attaching to the metal surface Ga of the article G as shown in FIG.
- a conductive seal layer for attaching the wireless communication device 10 to the article G is provided on the attachment surface 12 b of the dielectric substrate 12.
- the first and second radiation electrodes 14 and 16 are parallel to the metal surface Ga of the article G with a predetermined distance corresponding to the thickness of the dielectric substrate 12. You can face each other. That is, the dielectric substrate 12 serves as a bracket for providing the first and second radiation electrodes 14 and 16 with a distance from the metal surface Ga of the article G.
- the first and second radiation electrodes 14 and 16 are, for example, a copper film or an aluminum film, and are made of a flexible and conductive material. In the case of the present embodiment, the first and second radiation electrodes 14 and 16 have a rectangular shape having a longitudinal direction and a lateral direction.
- first and second radiation electrodes 14 and 16 are opposed to the length direction (Y-axis direction) of the wireless communication device 10. Specifically, the second radiation electrode 16 is in an independent state with respect to the first radiation electrode 14, that is, in a state in which the second radiation electrode 16 is spaced apart from the first radiation electrode 14 in terms of shape.
- the first radiation electrode 14 has a length L1 and a width W1 (L1> W1), and extends in the width direction (X-axis direction) of the wireless communication device 10 along the main surface 12a. It is extended.
- the second radiation electrode 16 has a length L2 and a width W2 (L2> W2), and extends along the major surface 12a in the length direction (Y-axis direction) of the wireless communication device 10. Yes. That is, on the main surface 12a, the first and second radiation electrodes 14 and 16 extend in directions intersecting each other, for example, directions different from each other by 90 degrees.
- the width W1 of the first radiation electrode 14 is smaller than the width W2 of the second radiation electrode 16. Further, the length L1 (length in the extending direction) of the first radiation electrode 14 is shorter than the length L2 of the second radiation electrode 16. Therefore, the size of the first radiation electrode 14 (size in a top view) is smaller than the size of the second radiation electrode 16.
- the length L1 of the first radiation electrode 14 is substantially equal to the width W2 of the second radiation electrode 16.
- the size of the wireless communication device 10 in the width direction (X-axis direction) is made compact.
- first and second radiation electrodes 14 and 16 include land portions 14a and 16a for connecting to the RFIC element 100, as will be described in detail later.
- the land portions 14a and 16a are provided so as to face each other between the first and second radiation electrodes 14 and 16, respectively.
- FIG. 4 shows an equivalent circuit of the wireless communication device 10 attached to the metal surface Ga of the article G.
- a stray capacitance C1 exists between the first radiation electrode 14 and a part of the metal surface Ga of the article G (a part facing the first radiation electrode 14).
- a stray capacitance C2 exists between the second radiation electrode 16 and a part of the metal surface Ga of the article G (a part facing the second radiation electrode 16).
- the stray capacitance C2 and the parasitic inductor L5 of the second radiation electrode 16 form a parallel resonance circuit whose resonance frequency is a predetermined frequency (for example, 900 MHz).
- the RFIC element 100 shown in FIG. 4 is an RFIC element corresponding to a communication frequency of, for example, 900 MHz band, that is, UHF band. Further, the RFIC element 100 has flexibility as described later in detail. Further, the RFIC element 100 includes an RFIC chip 106 and a matching circuit 108 for impedance matching between the RFIC chip 106 and the first and second radiation electrodes 14 and 16.
- the RFIC chip 106 also includes first and second input / output terminals 106a and 106b.
- the first input / output terminal 106 a is connected to the first radiation electrode 14 via the matching circuit 108.
- the second input / output terminal 106 b is connected to the second radiation electrode 16 through the matching circuit 108.
- the RFIC chip 106 When the first and second radiation electrodes 14 and 16 functioning as antennas receive a high-frequency signal from the outside, the RFIC chip 106 is activated by receiving a current induced by the reception. The activated RFIC chip 106 generates a high-frequency signal and outputs the generated signal to the outside as a radio wave via the first and second radiation electrodes 14 and 16.
- FIG. 5 is a perspective view of the RFIC element 100.
- the RFIC element 100 includes a multilayer substrate 120 as an element substrate on which the RFIC chip 106 and the matching circuit 108 are provided.
- the multilayer substrate 120 is configured by stacking a plurality of insulating layers having flexibility.
- the plurality of insulating layers are, for example, flexible resin insulating layers such as polyimide and liquid crystal polymer.
- FIG. 6 is a perspective view showing an internal structure of the RFIC element shown in FIG. From here, description will be made assuming that the side where the first and second terminal electrodes 102 and 104 are provided, that is, the side facing the dielectric substrate 12 in the wireless communication device 10 is the upper side of the RFIC element 100.
- FIG. 7A is a top view of the upper insulating layer of the multilayer substrate 120.
- FIG. 7B is a top view of the insulating layer at the center of the multilayer substrate 120.
- FIG. 7C is a top view of the lower insulating layer of the multilayer substrate 120.
- FIG. 8A is a cross-sectional view of the insulating layer along line B1-B1 shown in FIG. 7A.
- FIG. 8B is a cross-sectional view of the insulating layer along the line B2-B2 shown in FIG. 7B.
- FIG. 8C is a cross-sectional view of the insulating layer along the line B3-B3 shown in FIG. 7C.
- the multilayer substrate 120 includes an RFIC chip 106 and a power supply circuit 122 that functions as the matching circuit 108.
- the first terminal electrode 102 and the second terminal electrode 104 are formed on the multilayer substrate 120.
- the first terminal electrode 102 is connected to the land portion 14 a of the first radiation electrode 14.
- the second terminal electrode 104 is connected to the land portion 16 a of the second radiation electrode 16.
- the RFIC chip 106 has a structure in which various elements are incorporated in a semiconductor substrate made of a semiconductor such as silicon. Further, as shown in FIG. 7C, the RFIC chip 106 is formed with a first input / output terminal 106a and a second input / output terminal 106b.
- the power feeding circuit 122 includes a coil conductor 124 and interlayer connection conductors 126 and 128.
- the coil conductor 124 includes coil patterns 124a to 124c shown in FIG. 7B or 7C.
- the coil pattern 124a constitutes the first coil part CIL1.
- the coil pattern 124b constitutes the second coil part CIL2.
- the coil pattern 124c constitutes a third coil part CIL3 and a fourth coil part CIL4.
- the first coil portion CIL1, the third coil portion CIL3, and the interlayer connection conductor 126 are arranged to be aligned in the thickness direction (Z-axis direction) at a position on one side in the length direction (Y-axis direction).
- the second coil portion CIL2, the fourth coil portion CIL4, and the interlayer connection conductor 128 are arranged so as to be aligned in the thickness direction (Z-axis direction) at a position on the other side in the length direction (Y-axis direction). ing.
- the RFIC chip 106 is disposed between the first coil portion CIL1 and the second coil portion CIL2 when the multilayer substrate 120 is viewed in the height direction (Z-axis direction).
- the RFIC chip 106 is also disposed between the third coil part CIL3 and the fourth coil part CIL4.
- the first terminal electrode 102 is disposed at one position in the length direction (Y-axis direction), and the second terminal electrode 104 is disposed at the other position.
- the 1st and 2nd terminal electrodes 102 and 104 are produced from the copper foil provided with flexibility, and are formed in the strip shape of the same size.
- the multilayer substrate 120 includes three stacked sheet-like insulating layers 120 to 120c.
- the insulating layer 120b is located between the upper insulating layer 120a and the lower insulating layer 120c.
- the first terminal electrode 102 and the second terminal electrode 104 are formed on the insulating layer 120a.
- a through hole HL1 having a rectangular cross section is formed in the center of the insulating layer 120b.
- the through hole HL ⁇ b> 1 is formed to a size that accommodates the RFIC chip 106.
- a strip-shaped coil pattern 124c is formed around the through hole HL1 of the insulating layer 120b.
- the coil pattern 124c is composed of a flexible copper foil.
- the coil pattern 124c overlaps with the first terminal electrode 102 in the thickness direction (Z-axis direction) and is connected to the first terminal electrode by the interlayer connection conductor 130 extending in the thickness direction (Z-axis direction). 102.
- the other end of the coil pattern 124c overlaps with the second terminal electrode 104 when viewed in the thickness direction and is connected to the second terminal electrode 104 by an interlayer connection conductor 132 extending in the thickness direction.
- the interlayer connection conductors 130 and 132 are made of a metal bulk mainly composed of Sn.
- the coil pattern 124c rotates twice around the one end portion in the counterclockwise direction, and then bends and extends in the length direction (Y-axis direction).
- the coil pattern 124c extending in the length direction (Y-axis direction) bends in the width direction (X-axis direction), rotates twice around the other end in the counterclockwise direction, and then moves to the other end. Reach.
- strip-like coil patterns 124a and 124b are formed in the insulating layer 120c.
- the coil patterns 124a and 124b are made of a flexible copper foil.
- the outer end portion (first coil end T1) of the coil pattern 124a is disposed at a position overlapping one corner portion of the rectangular through hole HL1. Further, the outer end portion (second coil end T2) of the coil pattern 124b is longer than the corner portion where the first coil end T1 is arranged among the four corner portions of the rectangular through hole HL1. It is arranged at a position that overlaps the corner lined up in the vertical direction (Y-axis direction).
- the coil pattern 124a rotates 2.5 times clockwise around the center end and then bends in the width direction (X-axis direction). To the other end (first coil end T1). Similarly, when the end on the center side of the coil pattern 124b is the starting point, the coil pattern 124b rotates 2.5 times around the center end in the counterclockwise direction, and then the width direction (X-axis direction) ) To reach the other end (second coil end T2).
- the center side end of the coil pattern 124a is connected to one end of the coil pattern 124c by an extending interlayer connection conductor 126 extending in the thickness direction (Z-axis direction).
- the center side end of the coil pattern 124b is connected to the other end of the coil pattern 124c by an interlayer connection conductor 128 extending in the thickness direction.
- the interlayer connection conductors 126 and 128 are made of a metal bulk mainly composed of Sn.
- Dummy conductors 134 and 136 are formed on the insulating layer 120c.
- the dummy conductors 134 and 136 are made of a copper foil having flexibility.
- the dummy conductors 134 and 136 are the first and second coil ends T1 and T2 among the four corner portions of the rectangular through hole HL1. Are arranged so as to overlap with the corner portion facing each other in the width direction (X-axis direction).
- the RFIC chip 106 is mounted on the insulating layer 120c so that the four corner portions thereof face the first coil end T1, the second coil end T2, and the dummy conductors 134 and 136, respectively.
- the first input / output terminal 106a is connected to the first coil end T1
- the second input / output terminal 106b is connected to the second coil end T2.
- the thickness of the insulating layers 120a to 120c is not less than 10 ⁇ m and not more than 100 ⁇ m. Therefore, the RFIC chip 106 and the power feeding circuit 122 built in the multilayer substrate 120 can be seen through from the outside. Therefore, it is possible to easily confirm the connection state (presence of disconnection) between the RFIC chip 106 and the power feeding circuit 122.
- the inductor L1 corresponds to the first coil portion CIL1.
- the inductor L2 corresponds to the second coil portion CIL2.
- the inductor L3 corresponds to the third coil portion CIL3.
- the inductor L4 corresponds to the fourth coil portion CIL4.
- the characteristic of impedance matching by the feeder circuit 122 is defined by the values of the inductors L1 to L4.
- One end of the inductor L1 is connected to the first input / output terminal 106a of the RFIC chip 106.
- One end of the inductor L2 is connected to the second input / output terminal 106b of the RFIC chip 106.
- the other end of the inductor L1 is connected to one end of the inductor L3.
- the other end of the inductor L2 is connected to one end of the inductor L4.
- the other end of the inductor L3 is connected to the other end of the inductor L4.
- the first terminal electrode 102 is connected to the connection point of the inductors L1 and L3.
- the second terminal electrode 104 is connected to the connection point of the inductors L2 and L4.
- the first coil portion CIL1, the second coil portion CIL2, the third coil portion CIL3, and the fourth coil portion CIL4 are arranged so that the magnetic fields are in phase. It is wound and connected in series with each other. Accordingly, the magnetic fields generated from these coil portions CIL1 to CIL4 are directed in the same direction.
- the first coil portion CIL1 and the third coil portion CIL3 have substantially the same loop shape and the same first winding axis.
- the second coil part CIL2 and the fourth coil part CIL4 have substantially the same loop shape and the same second winding axis.
- the first winding axis and the second winding axis are arranged at positions sandwiching the RFIC chip 106.
- first coil part CIL1 and the third coil part CIL3 are magnetically and capacitively coupled.
- second coil part CIL2 and the fourth coil part CIL4 are magnetically and capacitively coupled.
- the RFIC chip 106 is composed of a semiconductor substrate. Therefore, the RFIC chip 106 functions as a ground or a shield with respect to the first coil unit CIL1, the second coil unit CIL2, the third coil unit CIL3, and the fourth coil unit CIL4. As a result, the first coil unit CIL1 and the second coil unit CIL2, and the third coil unit CIL3 and the fourth coil unit CIL4 are difficult to be coupled to each other both magnetically and capacitively. This can alleviate the concern that the communication signal pass band will be narrowed.
- the first coil portion CIL1 and the third coil portion CIL3 of the RFIC element 100 overlap the land portion 14a of the first radiation electrode 14, and the second coil portion CIL2 and the fourth coil portion CIL2
- the coil part CIL4 overlaps the land part 16a of the second radiation electrode 16. That is, the land portions 14 a and 16 a of the first and second radiation electrodes 14 and 16 exist between the coil portions CIL 1, CIL 2, CIL 3, and CIL 4 in the RFIC element 100 and the mounting surface 12 b of the dielectric substrate 12. .
- Each of the land portions 14a and 16a is an open-ended electrode, and the coil portions (CIL1, CIL2, CIL3, CIL4) of the RF element 100 form one coil in a form extending between the two electrodes.
- One electrode that completely covers the opening is not formed. Accordingly, the coil portions CIL1, CIL2, CIL3, and CIL4 in the RFIC element 100 are not easily affected by the potential of the metal surface Ga of the article G that is attached to the attachment surface 12b of the dielectric substrate 12, so that these coils
- the sections CIL1, CIL2, CIL3, CIL4, that is, the matching circuit 108 can function stably.
- the wireless communication device 10 can communicate even when attached to the metal surface Ga of the article G, has flexibility, and has high communication capability, that is, high radiation. Radio waves can be radiated efficiently. This will be specifically described.
- the matching circuit 108 of the RFIC element 100 performs impedance matching between the first and second radiation electrodes 14 and 16 and the RFIC chip 106 of the RFIC element 100.
- a resonance circuit is formed by the parasitic inductor L5 of the second radiation electrode 16 and the stray capacitance C2 between the second radiation electrode 16 and the metal surface Ga of the article G facing the second radiation electrode 16. Therefore, the wireless communication device 10 exhibits good communication characteristics at, for example, a UHF band frequency (for example, 900 MHz).
- the wireless communication device 10 is attached to the metal surface Ga of the article G through the dielectric substrate 12 as shown in FIG. Since the thickness of the dielectric substrate 12 is uniform, the distance between the metal surface Ga of the article G attached to the attachment surface 12b of the dielectric substrate 12 and the first radiation electrode 14, that is, the floating between them.
- the capacitance C1 is uniform regardless of the position on the first radiation electrode 14.
- the distance between the second radiation electrode 16 and the metal surface Ga of the article G, that is, the stray capacitance C2 between them is also uniform regardless of the position on the second radiation electrode 16. Therefore, regardless of the type of the article G, as shown in FIG. 4, the resonance frequency of the resonance circuit constituted by the parasitic inductor L5 and the stray capacitance C2 of the second radiation electrode 14 is stabilized.
- the wireless communication device 10 has flexibility. That is, the dielectric substrate 12, the first radiation electrode 14, the second radiation electrode 16, and the RFIC element 100, which are components of the wireless communication device 10, are made of a flexible material. Therefore, the wireless communication device 10 can be in close contact with a curved surface as well as a flat surface.
- the wireless communication device exhibits uniform communication characteristics even when attached to various articles. For example, as shown in FIG. 9, even if attached to the flat metal surface G1a of the carriage G1 in a flat state, or attached to the curved metal surface G2a of the gas cylinder G2 shown in FIG. Furthermore, even if it is attached to the metal surface G3a of the ring (band) G3 formed from the flexible metal thin plate shown in FIG. 11 and bends, the metal surface of the article and the first and second radiation electrodes 14, 16 The distance between them is uniform, thereby showing uniform communication characteristics.
- the wireless communication device 10 can be thinned. That is, it is possible to reduce the thickness while suppressing a decrease in communication distance.
- the wireless communication device 10 When the wireless communication device 10 is thinned, that is, when the dielectric substrate 12 is thinned (when the distance between the metal surface Ga of the article G and the first and second radiation electrodes 14 and 16 is reduced), the article G The stray capacitances C1 and C2 between the metal surface Ga and the first and second radiation electrodes 14 and 16 are increased. When the stray capacitances C1 and C2 are increased, most of the current flowing through the first and second radiation electrodes 14 and 16 is consumed for forming an electric field in the stray capacitances C1 and C2, and accordingly, from these radiation electrodes 14 and 16 The radiation efficiency of radio waves is reduced. When the radiation efficiency is lowered, radio waves are emitted with low radio field intensity, so that the communication distance of the wireless communication device is shortened.
- the inventors have found that the shape of the first and second radiation electrodes 14 and 16 can suppress a decrease in the communication distance of the wireless communication device due to the thinning of the dielectric substrate 12. It was.
- the first radiation electrode 14 and the second radiation electrode 16 have different shapes. Specifically, the first radiation electrode 14 extends in the width direction (X-axis direction) of the wireless communication device 10, and the second radiation electrode 16 extends in the length direction (Y-axis direction). . Further, the width W1 and the length L1 of the first radiation electrode 14 are smaller than the width W2 and the length L2 of the second radiation electrode 16.
- the direction of the current flowing through the first radiation electrode 14 and the direction of the current flowing through the second radiation electrode 16 are substantially crossed. I.e. substantially 90 degrees different. Specifically, current flows mainly in the width direction (X-axis direction) of the wireless communication device 10 in the first radiation electrode 14, and current flows mainly in the length direction (Y-axis direction) in the second radiation electrode 16. Flows.
- the wireless communication device 10 has the dielectric substrate 12 Even if it is thin (for example, 0.2 mm or more and 1 mm or less), the inventor has confirmed that it has a long communication distance (for example, a communication distance of about 2.0 m or more) by a test described later.
- Table 1 shows the geometric characteristics of samples A to G of a plurality of wireless communication devices tested by the inventor and the communication distance d as a result of the test.
- Samples A to D are relatively elongated wireless communication devices 210 as shown in FIG.
- Samples EG are relatively wide wireless communication devices 10 as shown in FIG.
- the length L2 of the second radiation electrode in these samples A to D and E to G is about a half wavelength of radio waves. Sample D will be described later.
- the electrodes of samples A to G of these wireless communication modules are made of an aluminum film.
- the dielectric substrate is made of a porous EVA resin having a dielectric constant of 2.8. Further, the measurement of the communication distance was performed in a state where each of the samples A to G was arranged at the center of an aluminum foil of 15 cm ⁇ 15 cm assuming the metal surface of the article.
- both ends 314b of the first radiation electrode 314 are provided as in the wireless communication device 310 illustrated in FIG. May be bent.
- both end portions 314 b of the first radiation electrode 314 extending in the width direction (X-axis direction) of the wireless communication device 310 are about 90 degrees. Bent to 316 side. Accordingly, the wireless communication device 310 has a compact size in the width direction as compared with the case where the first radiation electrode 314 extends linearly without bending.
- the RFID tag has a long communication distance of about 2 m. Can be realized.
- the samples B and D are compared, they are different in the shape of the second radiation electrode and the communication distance.
- the length L2 of the second radiation electrode is longer than that of the sample D and is about a half wavelength. Therefore, the communication distance d of the sample B is 5.4 m which is too sufficient for an RFID tag.
- the length L2 of the second radiation electrode is shorter than a half wavelength, but the communication distance d is still 2 m sufficient for an RFID tag. This is because, as shown in FIG. 14, the wireless communication device 410 of the sample D includes the constricted portion 416 b in the second radiation electrode 416.
- the parasitic inductor of the second radiating electrode, the second radiating electrode, and the metal of the article in the state where the length L2 of the second radiating electrode is about half wavelength A resonance circuit is obtained that obtains a desired resonance frequency (for example, 900 MHz) from the stray capacitance between the surfaces (that is, the thickness of the dielectric substrate). Therefore, when the length L2 of the second radiation electrode becomes shorter than a half wavelength, the parasitic inductance decreases, and the resonance frequency of the resonance circuit deviates from the desired resonance frequency. As a result, the sensitivity of the wireless communication device is reduced and the communication distance is shortened.
- a desired resonance frequency for example, 900 MHz
- the constricted portion 416 b is configured by forming a notch portion facing each of both ends in the width direction (X-axis direction) of the second radiation electrode 416.
- the current concentrates in a portion where the area of the cross section orthogonal to the extending direction (Y-axis direction) of the second radiation electrode 416, which is the direction in which the current mainly flows, is smaller than the other portions. Functions as a current concentrator.
- the parasitic inductance of the second radiation electrode increases. Therefore, the parasitic inductance reduced as the length L2 of the second radiation electrode is reduced can be compensated by the constricted portion 416b, that is, the current concentration portion.
- the communication distance is shorter than that of sample B because the length L2 of the second radiation electrode 416 is shorter than the half wavelength of the radio wave.
- the sample D secures a communication distance d of about 2 m by providing the constricted portion 416 b in the second radiation electrode 416.
- the length of the wireless communication device (the length L2 of the second radiation electrode) and the communication distance d can be adjusted as desired.
- a constricted portion may be provided on the second radiation electrode 416 as in the sample D shown in FIG. Good.
- the length L2 of the second radiation electrode may be set to about a half wavelength of the radio wave.
- a wireless communication device capable of wireless communication even when attached to a metal surface of an article can be thinned while suppressing a decrease in communication distance.
- the RFIC element 100 performs impedance matching between the RFIC chip 106 and the RFIC chip 106 and the first and second radiation electrodes 14 and 16. And a matching circuit 108.
- the matching circuit 108 may be omitted if impedance matching between the RFIC chip 106 and the first and second radiation electrodes 14 and 16 can be achieved by the impedance of the RFIC chip 106 itself. In this case, the RFIC chip 106 itself constitutes the RFIC element 100.
- the attachment surface 12b of the dielectric substrate 12 of the wireless communication device 10 is not provided with electrodes or the like unlike the main surface 12a.
- the embodiment of the present invention is not limited to this.
- the wireless communication device 510 shown in FIGS. 15 and 16 includes a conductive layer (for example, a copper film, an aluminum film, etc.) 518 on the mounting surface 512b of the dielectric substrate 512.
- the conductive layer 518 is not connected to the first and second radiation electrodes 514 and 516 provided on the main surface 512a of the dielectric substrate 512 in a direct current manner, and is not connected to the radiation electrodes 514 and 516. In an independent state.
- the wireless communication device 510 is attached to the metal surface Ga of the article G via a seal layer (not shown) provided on the conductive layer 518.
- the metal surface of the article to which the wireless communication device is attached is not necessarily a smooth surface.
- the metal surface may be uneven.
- the stray capacitance between the second radiation electrode and the metal surface differs depending on the position on the second radiation electrode. That is, the stray capacitance with respect to the second radiation electrode is not uniform. Similarly, the stray capacitance with respect to the first radiation electrode is not uniform.
- the wireless communication device 510 shown in FIGS. A conductive layer 518 is provided on the mounting surface 512b.
- the conductive layer 518 faces the entire first radiation electrode 514 and the entire second radiation electrode 516 with the dielectric substrate 512 interposed therebetween. Thereby, a stray capacitance is formed between the first radiation electrode 514 and the conductive layer 518 (opposing portion), and a stray capacitance is formed between the second radiation electrode 516 and the conductive layer 518 (opposing portion). It is formed.
- the wireless communication device 510 can exhibit uniform communication characteristics regardless of the surface shape of the metal surface of the article to which the wireless communication device is attached.
- FIGS. 1-10 Note that a wireless communication device which is an improved form of the wireless communication device 510 is shown in FIGS.
- the wireless communication device 610 shown in FIG. 17 and FIG. 18 also includes a conductive layer 618 on the mounting surface 612b of the dielectric substrate 612, similarly to the wireless communication device 510.
- the conductive layer 618 faces the second radiation electrode 616 provided on the main surface 612 a of the dielectric substrate 612, but faces the first radiation electrode 614. Not. Therefore, a stray capacitance is formed only between the second radiation electrode 616 and the conductive layer 618.
- the capacitance value is small.
- the first radiating electrode 614 is connected to the metal surface of the article via the dielectric substrate 612 and the air layer (the gap between the dielectric substrate 612 and the metal surface caused by the thickness of the conductive layer 618). It is because it opposes.
- the communication distance of the wireless communication device 610 is longer than that of the wireless communication device 510 in which the first radiation electrode 514 and the conductive layer 518 shown in FIG.
- a resonance circuit is configured by the second radiation electrode and the metal surface of the article facing the second radiation electrode, whereby the resonance frequency of the wireless communication device is determined. Therefore, even if the area of the portion of the conductor facing the first radiation electrode is zero (even if there is no conductor at a position facing the first radiation electrode in the thickness direction), the wireless communication device The communication characteristics are substantially unchanged.
- the first and second radiation electrodes 14 and 16 are provided on a substrate-like dielectric member, that is, the dielectric substrate 12.
- the embodiment of the present invention is not limited to this.
- the dielectric member 712 provided with the first and second radiation electrodes 714 and 716 is not in the form of a substrate but a structure including an internal space 712d communicating with the outside. It is.
- the dielectric member 712 includes a plurality of internal spaces 712d between a main surface 712a on which the first and second radiation electrodes 714 and 716 are provided and a mounting surface 712b to which a metal surface of the object is attached. Is provided.
- the dielectric member 712 also has through holes 712c of bolts (not shown) for attaching the wireless communication device 710 to the article at both ends in the length direction (Y-axis direction).
- the stray capacitance between each of the first and second radiation electrodes 714 and 716 and the metal surface of the article attached to the attachment surface 712b is reduced (when the internal space 712d is not provided). Compared to). That is, since the relative permittivity of air in the internal space 712d is about 1, the stray capacitance is reduced.
- the dielectric member 712 can be thinned (compared to the case without the internal space 712d). That is, the increase in stray capacitance between the first and second radiation electrodes 714 and 718 and the metal surface of the object caused by the reduction in thickness can be offset by the internal space 712d.
- the corner portion 716c of the second radiation electrode 716 on the RFIC element 100 side where current concentrates (current density is high) is not supported by the dielectric member 712. That is, the dielectric member 712 includes a recess 712e at a position facing the corner 716c of the second radiation electrode 716.
- the concave portion 712e reduces the stray capacitance between the corner portion 716c of the second radiation electrode 716 and the metal surface of the article attached to the attachment surface 712b. The reason is that the recess 712e provides an air layer having a relative dielectric constant of about 1 between them.
- the stray capacitance When the stray capacitance is reduced by the recess 712e, the current consumed for forming the electric field of the stray capacitance is reduced in the corner portion 716c of the second radiation electrode 716 where current is concentrated (compared to the case where there is no recess 712e). Accordingly, the current radiated to the radio wave increases and the radiation efficiency increases. As a result, the communication distance of the wireless communication device 710 becomes long.
- Such a recess 712e can also be provided at the corner of the first radiation electrode 714 where current concentrates.
- the first and second radiation electrodes 14 and 16 are provided on the outer surface of the main surface 12a of the dielectric substrate 12, as shown in FIG.
- the position where the first and second radiation electrodes 14 and 16 are provided is not limited to the main surface of the dielectric substrate.
- the dielectric member 812 of the wireless communication device 810 shown in FIG. 21 includes an internal space 812a and an attachment surface 812b attached to the metal surface of the article.
- the first and second radiation electrodes 814 and 816 are attached to the top surface 812c of the internal space 812a (the internal surface far from the attachment surface 812b). Therefore, the first and second radiation electrodes 814 and 816 are attached to the attachment surface 812b via the air layer of the internal space 812a and the dielectric member 812 (a portion between the internal space 812a and the attachment surface 812b). Opposite the metal surface of the article.
- the air layer By interposing the air layer, the stray capacitance between the first and second radiation electrodes 814 and 816 and the metal surface of the article can be reduced. Thereby, the increase in the stray capacitance between the first and second radiation electrodes 814 and 816 and the metal surface of the object caused by the reduction in thickness can be offset by the internal space 812a.
- a conductive layer may be provided on the floor surface of the internal space of the dielectric member 812 (the internal surface close to the mounting surface 812b). Accordingly, the stray capacitance between the first and second radiation electrodes 814 and 816 and the conductive layer is uniform no matter what the attachment surface 812b is attached to the metal surface of the article. The device can exhibit uniform communication characteristics.
- the wireless communication device 810 shown in FIG. 21 a form in which the portion of the dielectric member 812 does not exist between the first and second radiation electrodes 814 and 816 and the metal surface of the article is also possible. . That is, the dielectric member 812 is formed in a cap shape (bottomed cylindrical shape), and the opening edge functions as the attachment surface 812b. In this case, only an air layer exists between the first and second radiation electrodes and the metal surface of the article, thereby further reducing the stray capacitance between them. As a result, the wireless communication device can be further reduced in thickness.
- the first and second radiation electrodes 14 and 16 and the RFIC element 100 are provided on the main surface 12 a of the dielectric member 12.
- the embodiment of the present invention is not limited to this.
- the first and second radiation electrodes and the RFIC element may be incorporated in the dielectric member.
- the wireless communication device 10 is flexible so that it can be attached to a curved surface as well as a flat surface.
- the embodiment of the present invention is not limited to this.
- the wireless communication device may not be flexible and may be a flat plate having a flat surface or a curved plate having a curved surface.
- the wireless communication device may be configured so that the frequency band of the communication signal (that is, the resonance frequency) is widened in order to improve versatility.
- FIG. 22 shows a wireless communication device configured to expand the resonance frequency band.
- the resonance frequency of the wireless communication device 910 is determined by the second radiation electrode 916.
- a plurality of cutout portions 916a and 916b are formed in the second radiating electrode 916 so that the resonance frequency band of the wireless communication device 910 is expanded.
- the second radiation electrode 916 is provided at one end in the width direction (X-axis direction) and extends toward the center of the width direction (or beyond the center).
- a notch 916a is provided.
- a second notch portion 916b is provided at the other end in the width direction and extends toward the center in the width direction (or beyond the center).
- the first cutout portion 916a and the second cutout portion 916b have, for example, a slit shape (a concave portion elongated in the width direction).
- the first notch 916a and the second notch 916b are arranged at intervals in the length direction (Y-axis direction).
- the distance between the first notch 916a and one end in the length direction of the second radiation electrode 916 (the end far from the first radiation electrode 914), and the second The distance between the notch 916b and the other end in the length direction of the second radiation electrode 916 is the same A1.
- the lengths in the width direction of the first notch 916a and the second notch 916b are the same A2.
- the wireless communication device 910 has the frequency characteristics shown in FIG. Specifically, as shown in FIG. 23, it has a frequency characteristic with a high antenna gain with a wide bandwidth bf between a frequency f1 (for example, 860 MHz) and f2 (for example, 930 MHz).
- the bandwidth bf shown in FIG. 23 is determined by the distance A1 shown in FIG. Specifically, as shown in FIG. 22, the second radiation electrode 916 has two different resonance modes (two different standing waves SW1 and SW2 are generated). That is, the standing wave SW1 having the shortest wavelength and the frequency f2 is generated in the second radiation electrode 916. Further, the standing wave SW2 having the maximum wavelength and the frequency f1 is generated in the second radiation electrode 1524. By combining the resonant mode in which the standing wave SW1 is generated and the resonant mode in which the standing wave SW2 is generated, the frequency band of the communication signal is expanded. Further, the bandwidth bf is proportional to the distance A1 shown in FIG.
- the bandwidth bf of a desired resonance frequency can be obtained by appropriately setting the distance A1.
- the lower limit frequency f1 and the upper limit frequency f2 of the resonance frequency band can be obtained by appropriately setting the lengths (X-axis direction) of the first and second cutout portions 916a and 916b. Can do.
- the wireless communication device 910 has a wider communication signal frequency (that is, resonance frequency) band and can be used for more various purposes (higher versatility).
- the second radiation electrode 916 is provided with one first notch 916 a at one end in the width direction (X-axis direction) and at the other end.
- One second notch 916b is provided.
- a plurality of first cutout portions 916a and a plurality of second cutout portions 916b may be provided.
- the plurality of first notches 916a and the plurality of second notches 916b are alternately arranged at equal intervals in the length direction (Y-axis direction) of the second radiation electrode 916.
- only one first notch 916a or only one second notch 916b may be provided in the second radiation electrode 916.
- the wireless communication device is not limited to being used for transmission / reception of UHF band frequency signals, but for transmitting / receiving signals of various band frequencies. It can be used.
- the wireless communication device according to the embodiment of the present invention may be used, for example, for transmission / reception of signals having a frequency in the HF band.
- the wireless communication device according to the embodiment of the present invention has been described above as being used by being attached to the metal surface of the article. It is clear that wireless communication can be performed by itself without being attached to the cable. That is, the wireless communication device according to the embodiment of the present invention is a wireless communication device that can perform wireless communication at a communication distance that is substantially the same as that when the wireless communication device is attached to the metal surface of the article but not attached to the article. is there.
- the present invention is applicable to any wireless communication device having an electrode that radiates radio waves and a dielectric member that supports the electrode.
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Abstract
Description
物品の金属面に取り付けられた状態で使用可能な無線通信デバイスであって、
前記物品の金属面に取り付けられる取り付け面を備える誘電体部材と、
前記誘電体部材に設けられ、第1および第2の端子電極を備えるRFIC素子と、
前記物品の金属面に対して所定の距離をあけて平行に対向するように前記誘電体部材に設けられ、前記RFIC素子の第1の端子電極に接続されている第1の放射電極と、
前記物品の金属面に対して前記所定の距離をあけて平行に対向するように前記誘電体部材に設けられ、前記第1の放射電極に対して独立した状態で、前記RFIC素子の第2の端子電極に接続されている第2の放射電極と、を有し、
前記第1および第2の放射電極が、互いに交差する方向に延在し、
前記第1の放射電極が、前記第2の放射電極に比べて、幅が小さく且つ延在方向長さが短い、無線通信デバイスが提供される。
少なくとも一部に金属面を備え、前記金属面に取り付けられた無線通信デバイスを有する物品であって、
前記無線通信デバイスが、
前記物品の金属面に取り付けられる取り付け面を備える誘電体部材と、
前記誘電体部材に設けられ、第1および第2の端子電極を備えるRFIC素子と、
前記物品の金属面に対して所定の距離をあけて平行に対向するように前記誘電体部材に設けられ、前記RFIC素子の第1の端子電極に接続されている第1の放射電極と、
前記物品の金属面に対して前記所定の距離をあけて平行に対向するように前記誘電体部材に設けられ、前記第1の放射電極に対して独立した状態で、前記RFIC素子の第2の端子電極に接続されている第2の放射電極と、を有し、
前記第1および第2の放射電極が、互いに交差する方向に延在し、
前記第1の放射電極が、前記第2の放射電極に比べて、幅が小さく且つ延在方向長さが短い、物品が提供される。
12 誘電体部材
12b 取り付け面
14 第1の放射電極
16 第2の放射電極
100 RFIC素子
G 物品
Ga 金属面
Claims (10)
- 物品の金属面に取り付けられた状態で使用可能な無線通信デバイスであって、
前記物品の金属面に取り付けられる取り付け面を備える誘電体部材と、
前記誘電体部材に設けられ、第1および第2の端子電極を備えるRFIC素子と、
前記物品の金属面に対して所定の距離をあけて平行に対向するように前記誘電体部材に設けられ、前記RFIC素子の第1の端子電極に接続されている第1の放射電極と、
前記物品の金属面に対して前記所定の距離をあけて平行に対向するように前記誘電体部材に設けられ、前記第1の放射電極に対して独立した状態で、前記RFIC素子の第2の端子電極に接続されている第2の放射電極と、を有し、
前記第1および第2の放射電極が、互いに交差する方向に延在し、
前記第1の放射電極が、前記第2の放射電極に比べて、幅が小さく且つ延在方向長さが短い、無線通信デバイス。
- 前記第1および第2の放射電極に対して独立した状態で前記誘電体部材の取り付け面に設けられた導電層を有する、請求項1に記載の無線通信デバイス。
- 前記第1の放射電極の延在方向長さが、前記第2の放射電極の幅に等しい、請求項1または2に記載の無線通信デバイス。
- 前記第2の放射電極が、延在方向と直交する断面の面積が他の部分に比べて小さい電流集中部を備える、請求項1から3のいずれか一項に記載の無線通信デバイス。
- 前記第2の放射電極が、幅方向の一方の端に設けられて前記幅方向の中央に向かって延在する第1の切り欠き部を備える、請求項4に記載の無線通信デバイス。
- 前記第2の放射電極が、前記幅方向の他方の端に設けられて前記幅方向の中央に向かって延在する第2の切り欠き部を備え、
前記第1の切り欠き部と前記第2の切り欠き部とが、前記第2の放射電極の延在方向に間隔をあけて並んでいる、請求項5に記載の無線通信デバイス。
- 前記RFIC素子が、前記第1の端子電極に接続された第1のコイルと、前記第2の端子電極に接続された第2のコイルとを備え、
前記第1の放射電極は、前記第1の端子電極に接続される第1のランド部を備え、
前記第2の放射電極は、前記第2の端子電極に接続される第2のランド部を備え、
前記金属面から見たとき、前記第1のコイルと前記第1のランド部とが重ねられており、且つ、前記第2のコイルと前記第2のランド部とが重ねられている、請求項1から6のいずれか一項に記載の無線通信デバイス。
- 前記誘電体部材が、前記第1および第2の放射電極の角部に対向する位置に凹部を備える、請求項1から7のいずれか一項に記載の無線通信デバイス。
- 前記所定の距離が0.2mm以上1mm以下である、請求項1から8のいずれか一項に記載の無線通信デバイス。
- 少なくとも一部に金属面を備え、前記金属面に取り付けられた無線通信デバイスを有する物品であって、
前記無線通信デバイスが、
前記物品の金属面に取り付けられる取り付け面を備える誘電体部材と、
前記誘電体部材に設けられ、第1および第2の端子電極を備えるRFIC素子と、
前記物品の金属面に対して所定の距離をあけて平行に対向するように前記誘電体部材に設けられ、前記RFIC素子の第1の端子電極に接続されている第1の放射電極と、
前記物品の金属面に対して前記所定の距離をあけて平行に対向するように、前記誘電体部材に設けられ、前記第1の放射電極に対して独立した状態で、前記RFIC素子の第2の端子電極に接続されている第2の放射電極と、を有し、
前記第1および第2の放射電極が、互いに交差する方向に延在し、
前記第1の放射電極が、前記第2の放射電極に比べて、幅が小さく且つ延在方向長さが短い、物品。
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DE112016003304.4T DE112016003304B4 (de) | 2015-07-21 | 2016-07-14 | Drahtloskommunikationsbauelement und mit demselben ausgestatteter artikel |
CN201690001024.1U CN208385635U (zh) | 2015-07-21 | 2016-07-14 | 无线通信器件及具备该无线通信器件的物品 |
DE212016000147.7U DE212016000147U1 (de) | 2015-07-21 | 2016-07-14 | Drahtloskommunikationsbauelement und mit demselben ausgestatteter Artikel |
JP2016575712A JP6288318B2 (ja) | 2015-07-21 | 2016-07-14 | 無線通信デバイスおよびそれを備えた物品 |
US15/869,448 US10262252B2 (en) | 2015-07-21 | 2018-01-12 | Wireless communication device and article equipped with the same |
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DE112016003304B4 (de) | 2023-03-02 |
CN208385635U (zh) | 2019-01-15 |
US20180144225A1 (en) | 2018-05-24 |
DE212016000147U1 (de) | 2018-02-22 |
DE112016003304T5 (de) | 2018-04-19 |
JP6288318B2 (ja) | 2018-03-07 |
US10262252B2 (en) | 2019-04-16 |
JPWO2017014152A1 (ja) | 2017-07-20 |
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