CN103094667B - Magnetic antenna - Google Patents
Magnetic antenna Download PDFInfo
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- CN103094667B CN103094667B CN201310002009.1A CN201310002009A CN103094667B CN 103094667 B CN103094667 B CN 103094667B CN 201310002009 A CN201310002009 A CN 201310002009A CN 103094667 B CN103094667 B CN 103094667B
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Classifications
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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
- H01Q1/362—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith for broadside radiating helical antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
- H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
- H01Q7/08—Ferrite rod or like elongated core
-
- 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
- H01Q1/2283—Supports; Mounting means by structural association with other equipment or articles mounted in or on the surface of a semiconductor substrate as a chip-type antenna or integrated with other components into an IC package
-
- 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
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Details Of Aerials (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
This magnetic antenna the invention provides the magnetic antenna of a kind of RFID of being best suited for label and RFID label read write line, even if also can be stablized its function of performance near metal object and its production is high. This magnetic antenna has the structure that is provided with conductive layer on the magnetosphere that forms coil by insulating barrier. In addition, magnetic antenna is configured to radial configuration multiple magnetospheric coils that are shaped as square or rectangle, and in order to make polarity identical, one end of each coil adopts series connection or parallel way to connect by magnetosphere, on one or two faces in the upper and lower surface of coil, be provided with insulating barrier, and have conductive layer in the arranged outside of an insulating barrier. Above-mentioned magnetic antenna utilizes the manufacture of LTCC technology.
Description
It is of the same name that the application is that the application number that proposes on July 6th, 2006 is 200680023105.2The divisional application of application.
Technical field
The present invention relates to a kind of magnetic antenna, particularly, it is the communication that utilizes magnetic field compositionWith magnetic antenna, even if the situation of this magnetic antenna in the object that makes an addition to metal manufactureUnder, also can be with good sensitivity receiving and transmitting signal. Magnetic antenna of the present invention is particularly suitable forRFID label (tag) and RFID be read write line (reader/writer) for label.
Background technology
For use magnetic is received and dispatched electromagnetic antenna (hereinafter referred to as " magnetic antenna "),Be on magnetic, to be wound around wire to form coil, make the magnetic field composition of coming in from outside run through magneticBody, and it is responded in coil, afterwards, magnetic field composition conversion is become to voltage (or electric current)Antenna, it is widely used in midget receiver or television set always. In addition magnetic,Antenna is also applied to the non-contact object identification that is called as RFID label that the nearly stage popularizesIn device.
On the other hand, in RFID label, higher if frequency becomes, do not use magnet alsoAnd the loop aerial (loop that uses the coil surface loop coil parallel with identifying object thing to formAntenna), and, in the situation that frequency is high (UHF band or microwave band), comprise RFIDLabel, generally, is widely used and does not detect magnetic field composition but detect electric field compositionElectric field antenna (dipole antenna (dipoleantenna) or dielectric substance antenna).
But, for this loop aerial and electric field antenna, the feelings in metal object near itUnder condition, in metal object, can produce image (mirror effect (mirroreffect)), and imageElectric field become the phase place contrary with antenna, electric field is vanishing on metal covering, therefore, willSuch problem is lost in the sensitivity that occurs antenna. Therefore, for fear of occurring such problem,And develop a kind of magnetic antenna (patent documentation 1), it possesses the time of overlooking coil surface and is formed asThe coil of square (square) or rectangle (rectangle) shape, and according to coil sectionMode perpendicular to the metal covering of metal identifying object thing directly sticks on object. In addition,Also propose a kind of noncontacting proximity sensor coil (patent documentation 2), it actively utilizes pastes magneticThe metal covering of antenna makes coil corresponding thereto in the direction of eliminating the magnetic field parallel with metal covering,In the direction vertical with metal covering, produce magnetic field.
Patent documentation 1: TOHKEMY 2003-317052 communique
Patent documentation 2: TOHKEMY 2003-318634 communique
But, for being applied to the above-mentioned magnetic antenna of RFID label, at winding(winding), in the situation that coil contacts with metal object, the contact-making surface of winding and metallic plate becomesMust be unstable, its result produces the problem that deviation appears in characteristic. On the other hand, at RFID labelWith read write line in, people expect to use the magnetic that electrode of a kind of need just can receiving and transmitting signalProperty antenna, still, because its two ends of this antenna are open architecture, therefore, at coil two endsProduce magnetic field, so, have in two separated problems that utmost point receiving and transmitting signal is such. Separately, develop follow-on magnetic antenna in order to address this problem outward, still, in this magneticIn antenna, same with above-mentioned situation, using winding such as enamel-covered wire (enamelledwire) etc.In the situation that coil contacts with metal object, its characteristic also there will be the problem of deviation.
No matter be applied to RFID label or be applied to read write line, the equal amount of antenna of windingThe poor such problem of producing property. And, if original magnetic antenna is near metal object, canThe characteristic that occurs magnetic antenna changes, the problem that resonant frequency change is such, forIn target frequency, obtain resonance, and must be pasted on metallic plate and separately to its frequencyAdjust.
Summary of the invention
The present invention completes in view of above-mentioned actual conditions, and its object is to provide a kind of and answersBe used for the magnetic antenna of RFID label and RFID read write line, even if this magnetic antenna is onlineIn the situation of circle contacting metal thing, also there will not be the phenomenon of deviation as the characteristic of antenna, andAnd its production is good. In addition, even if provide a kind of near metal object in the situation that, its resonanceThe magnetic antenna that frequency also can not change. In addition, other object of the present invention is to provideBe applied to a magnetic antenna for RFID label and RFID read write line, and can be onlineA magnetic antenna of extremely going up correct receiving and transmitting signal of circle.
In the present invention, adopt one to form with coiled type configured electrodes material on magnetosphereCoil, and pass through insulating barrier and the structure of lamination conductive layer on this coil, so, canSolve above-mentioned each problem.
The present invention who, is best suited for RFID label is by three main points groups of the following the first～threeBecome, its first main points are: a kind of magnetic antenna, it is the magnetic sky for receiving and dispatching magnetic field compositionLine, is characterized in that, comprising: with coiled type at magnetospheric periphery configured electrodes material and structureBecome coil, at the set insulating barrier of one or two lateral surfaces of this coil, Yi JiThe set conductive layer of lateral surface of one or two insulating barriers.
The second main points of the present invention are: a kind of magnetic antenna, it is used for receiving and dispatching magnetic field compositionMagnetic antenna, is characterized in that: the mixture of Magnaglo and adhesive resin is being formed asTabular and on the individual layer or the magnetosphere of multi-ply construction that form, with coiled type in its periphery configurationElectrode material forms coil as circuit, is provided with insulating barrier at two lateral surfaces of this coil,On the lateral surface of one or two insulating barriers, be provided with conductive layer, and cut according to preliminary dimensionAfter disconnected, one is fired formation.
The 3rd main points of the present invention are: a kind of magnetic antenna, it is used for receiving and dispatching magnetic field compositionMagnetic antenna, is characterized in that: at mictomagnetism powder and adhesive and the flat shape being shapedFor offering through hole on the tabular individual layer of square or rectangle or the magnetosphere of multi-ply construction,Injecting electrode material in this through hole, and, with orthogonal magnetospheric two faces of through hole onUtilize electrode material to form electrode layer, this electrode layer is connected with through hole, thus, make structureFor magnetospheric two ends coil in open state on magnetic circuit, utilize insulating barrier to clamp formationThere are the top and bottom of the coil of electrode layer, on the lateral surface of one or two insulating barriers, disposeConductive layer, cuts off in the position that is equivalent to the open end face of through hole and coil and one is fired formation.
In addition, be best suited for RFID the present invention of read write line by the following the four～seven fourMain points composition, its 4th main points are: a kind of magnetic antenna, it is used for receiving and dispatching magnetic field compositionMagnetic antenna, is characterized in that: possessing multiple is the magnetic of square or rectangle by flat shapeThe coil that layer forms, these coils interval with approximate equality under the state of overlooking is radiationShape configuration, and in order to make its polarity identical, one end of each coil is in radiation shapeThe heart adopts series connection or mode in parallel to interconnect by magnetosphere, the other end of each coilOutside towards radiation shape is open, and, one or two in the top and bottom of coilOn be provided with insulating barrier, the arranged outside of an insulating barrier has conductive layer therein.
Five points of the present invention is: a kind of magnetic antenna, it is used for receiving and dispatching magnetic field compositionMagnetic antenna, is characterized in that: possessing multiple is the magnetic of square or rectangle by flat shapeThe coil that layer forms, these coils interval with approximate equality under the state of overlooking is radiationShape configuration, and one end of each coil is open towards center one side of radiation shape, eachThe other end of coil is towards the outside of radiation shape, and in order to make its polarity identical and in peripheryThe annulus portion of side adopts series connection or mode in parallel to interconnect by magnetosphere, and,On one or two in the top and bottom of coil, be provided with insulating barrier, therein an insulating barrierArranged outside have conductive layer.
The 6th main points of the present invention are: a kind of magnetic antenna, it is in order to receive and dispatch magnetic field compositionThe magnetic antenna that utilizes LTCC technology to manufacture, is characterized in that: at mictomagnetism powder and stickyMixture to offer through hole on the individual layer of tabular shaping or the magnetosphere of multi-ply construction, at thisInjecting electrode material in through hole, and, with orthogonal magnetospheric two faces of through hole on utilizeElectrode material forms electrode layer, is running through magnetosphere by the position at through hole center, thus, withThe mode for example, being connected with magnetosphere at the center of multiple (three) coil that forms radiation shapeForm coil, utilize insulating barrier from above and below clamp the magnetosphere of this coil, and,The insulating barrier being configured in above magnetosphere is the insulation of boring a hole with the shape of covers electrode layerLayer, the insulating barrier below magnetosphere be provided with the employing material identical with electrode material more belowThe conductive layer that material forms, and form or one is cut after firing formation by being cut into fire after monolithicBecome monolithic and manufacture, multiple coils that the magnetosphere that is square or rectangle by flat shape forms,Interval with approximate equality under the state of overlooking is radial configuration, and, in order to make its utmost pointProperty identical, one end of each coil adopts series connection or mode in parallel at the center of radiation shapeInterconnect by magnetosphere, the other end of each coil is open towards the outside of radiation shape.
The 7th main points of the present invention are: a kind of magnetic antenna, it is in order to receive and dispatch magnetic field compositionThe magnetic antenna that utilizes LTCC technology to manufacture, is characterized in that: at mictomagnetism powder and stickyMixture to offer through hole on the individual layer of tabular shaping or the magnetosphere of multi-ply construction, at thisInjecting electrode material in through hole, and, with orthogonal magnetospheric two faces of through hole on utilizeElectrode material forms electrode layer, is running through magnetosphere formation coil by the position at through hole center,Utilize insulating barrier from above and below clamp the magnetosphere of this coil, and, be configured in magneticThe insulating barrier of property above layer is the insulating barrier of boring a hole with the shape of covers electrode layer, at magnetosphereThe conduction that is provided with the employing material formation identical with electrode material more below of insulating barrier belowLayer, and manufacture by being cut into fire to form after monolithic, be square or rectangle by flat shapeMagnetosphere form multiple coils, the interval with approximate equality under the state of overlooking is radiationShape configuration, and one end of each coil is open towards center one side of radiation shape, eachThe other end of coil is towards the outside of radiation shape, and in order to make its polarity identical and in peripheryThe annulus portion of side interconnects by magnetosphere.
Magnetic antenna of the present invention is owing to adopting LTCC technology that conductive layer is set, therefore, and laminationThe adhesion of each layer good, can be stably in conjunction with winding and the conductive layer that appends, and,Under environment for use, without adjusting, use independent element to adjust frequency. In addition, byIn having appended conductive layer, therefore, in the time approaching metal object, its characteristic also can not change.In addition, owing to adopting a plate just can stably make multiple elements, therefore, can not only suppressThe deviation of each element, improves production, and can reduce manufacturing cost.
Particularly, due to the related magnetic antenna of the first～three main points of the present invention, pastingThe variation of the resonant frequency on metal covering time is seldom below 1MHz, therefore, and Neng GouIn the wider frequency range of 125KHz to 2.45GHz, apply, for example, be applied toIn the situation of the RFID label of 13.56MHz, though by label sticking on metal covering, communicationDistance also can be more than 3cm. In addition, by the lamination structure of raw cook is designed to centerThe laterally zygomorphic lamination of coil structure, therefore, the distortion after firing can be controlled to every 1cmLong limit is below 0.5mm, thereby can be used as more practical antenna.
In addition, the related magnetic antenna of the four～seven main points of the present invention, at conductive layerArranged outside magnetosphere, like this, characteristic just can further suppress to be pasted in metal object timeVariation. Magnetic antenna of the present invention is not limited to RFID label read write line, also can beIn RFID label, use, become the magnetosphere of the core of coil by selection, can be at 125KHzTo the wider frequency range of 2.45GHz, apply.
Brief description of the drawings
Fig. 1 is the coil portion that represents the related magnetic antenna of the first～three main points of the present inventionThe stereogram of the lamination structure dividing.
Fig. 2 is the reality that represents the magnetic antenna related as the first～three main points of the present inventionExecute the stereogram of example 1.
Fig. 3 is the reality that represents the magnetic antenna related as the first～three main points of the present inventionExecute the stereogram of example 2.
Fig. 4 is the reality that represents the magnetic antenna related as the first～three main points of the present inventionExecute the stereogram of example 3.
Fig. 5 is the reality that represents the magnetic antenna related as the first～three main points of the present inventionExecute the stereogram of example 4.
Fig. 6 is the reality that represents the magnetic antenna related as the first～three main points of the present inventionExecute the stereogram of example 5.
Fig. 7 is the reality that represents the magnetic antenna related as the first～three main points of the present inventionExecute the stereogram of example 6.
Fig. 8 is the stereogram representing as the lamination magnetic antenna of the comparative example 1 without conductive layer.
Fig. 9 is the reality that represents the magnetic antenna related as the four～seven main points of the present inventionExecute the stereogram of example 7.
Figure 10 is the reality that represents the magnetic antenna related as the four～seven main points of the present inventionExecute the stereogram of example 8.
Figure 11 is in the magnetic antenna of Fig. 9 and Figure 10, is connected in series three coils,The circuit-mode figure of the example of shnt capacitor between its two ends.
Figure 12 is in the magnetic antenna of Fig. 9 and Figure 10, is connected in series three coils,The circuit-mode figure of the example of shnt capacitor between its two ends.
Figure 13 is in the magnetic antenna of Fig. 9 and Figure 10, three coils that are connected in parallel,The circuit-mode figure of the example of shnt capacitor between the two ends of each coil.
Symbol description
11: through hole, 12: electrode layer, 13: the open end face, 14 of coil: coil, 15: magneticProperty layer, 16: insulating barrier, 17: conductive layer, 18:IC chip splicing ear, 19: coil drawsLine terminals, 1R:FM radio (radio), 1C: electrode for capacitors, 21: coil portion magneticLayer, 22: coil electrode, 23: insulating barrier, 24: conductive layer, 25: magnetosphere, 26:The coil electrode, 27 that through hole cross section forms: the direction, 28 of the magnetic line of force: capacitor, 29: lineCircle lead terminal
Detailed description of the invention
First, with reference to Fig. 1～Fig. 7 illustrate the most applicable RFID label of the present invention first～The embodiment of the related magnetic antenna of the 3rd main points.
Particularly, magnetic antenna of the present invention be by the coil shown in Fig. 1 14 from it belowUtilize the insulating barrier 16 shown in Fig. 2 clamp and form. In magnetic antenna of the present invention, coil14 as shown in Figure 1, and the magnetosphere 15 that adopts flat shape to be formed as square or rectangle forms.Magnetosphere 15 possesses the layer structure of individual layer or multilayer, and each layer by mictomagnetism powder and bondingAgent and form tabular (sheet: sheet). On magnetosphere 15, offer through hole 11, make electrodeMaterial flows in through hole 11. And, with the magnetosphere of through hole 11 square crossings (orthogonal)15 two sides utilizes electrode material to form electrode layer 12. Electrode layer 12 is connected with through hole 11. ThisSample, the two ends that form the magnetosphere 15 of coil 14 become open state on magnetic circuits.
And, as shown in Figure 2, be printed with the coil 14 of electrode layer 12 from it below by exhaustedEdge layer 16 clamping, are provided with conductive layer 17 above insulating barrier at one or two. By coil14, the above-mentioned laminate that insulating barrier 16 and conductive layer 17 form is open at through hole 11 and coilEnd face 13 places are cut off and one is fired formation. In the present invention, as mentioned above, by usingLTCC(LowTemperatureCo-firedCeramics; LTCC) technology, andCan improve volume production.
In magnetic antenna of the present invention, as shown in Figure 3, also can be provided with coil lead endSon 19 and IC chip splicing ear 18. , be printed with coil 14 upper of electrode layer 12On insulating barrier 16 below, through hole 11 is set, electrode material 11 is flow in this through hole 11,Through hole 11 is connected with the two ends of coil 14. And, utilize electrode material on the surface of insulating barrier 16Material printed coil lead terminal 19 and IC chip splicing ear 18. By coil 14, insulating barrier 16And the above-mentioned laminate that conductive layer 17 forms is fired formation by one.
Magnetic antenna of the present invention as shown in Figure 4, also can be at the insulating barrier with conductive layer 17Magnetosphere 15 one are set below 16 and fire formation. Like this, at magnetic antenna of the present inventionIn, even if approach metal object, it is less that its characteristic variations also becomes, and can further reduce resonanceThe variation of frequency. As shown in Figure 5, conductive layer 17 also can be set on insulating barrier 16And below above-mentioned insulating barrier 16, magnetosphere 15 is set, and enters below this is magnetosphericOne step arranges insulating barrier 16 and one is fired formation. Like this, in magnetic antenna of the present invention,Just can be equilibrated at magnetic antenna interlayer produce stress equilibrium and reduce distortion.
In addition,, in magnetic antenna of the present invention, as shown in Figure 6, also can be equipped with capacitorElectrode 1C. , outside one or two of insulating barrier 16 of the top and bottom of clamping coil 14On side, configure electrode for capacitors 1C, in the outside of the insulating barrier 16 of configuration electrode for capacitors 1CFace arranges insulating barrier 16, is printed with electrode at the lateral surface of this insulating barrier, and exhausted to clamp thisThe mode of edge layer forms capacitor. Coil 14 and IC chip splicing ear 18 and coil lead endSon 19 connects in mode in parallel or series connection.
And, in magnetic antenna of the present invention, also can on insulating barrier, print parallelThereby electrode or comb poles form capacitor, coil 14 in parallel with winding wiring terminal orBe connected in series. Capacitor can be both the parallel flat structure that clips insulating barrier 16, can be alsoThe planar configuration of comb shape or parallel pole. In addition, if adopt parallel flat structure, asShown in Fig. 6, one of them electrode for capacitors also can have IC chip splicing ear 18 concurrently.
Magnetic antenna of the present invention is in magnetosphere 15, to use Ni-Zn based ferrite (ferrite)Magnet, and fire and manufacture by one. The composition of the ferrite powder using is preferably:Fe2O3: 45～49.5 moles of (mol) %, NiO:9.0～45.0 % by mole, ZnO:0.5～35.0 % by mole, CuO:4.5～15.0 % by mole, its composition is best according to the frequency usedThe mode that in band, magnetic susceptibility is high, magnetic loss is low is selected. If magnetic susceptibility is too low,Coil windings number required while adopting LTCC technology to form increases too much, causes at manufacture viewDifficulty. On the other hand, if magnetic susceptibility is too high, because loss increases, therefore be not suitable for skyLine. For example, in the situation that being applied to RFID label, the magnetic susceptibility under 13.56MHz is 70～120, in the time of civilian FM broadcast reception, the magnetic susceptibility under 100MHz is 10～30, preferably withThis mode is selected ferrite composition. Wherein, the firing temperature of ferrite (ferrite) be 800～1000 DEG C, be preferably 850～920 DEG C.
In addition,, for insulating barrier 16, use Zn based ferrite. As this ferrite powderIt is 10 that the volume intrinsic resistance of fired body is preferably selected in end8The Zn of the above composition of Ω (ohm) cmBased ferrite. , the composition of Zn based ferrite preferably: Fe2O3: 45～49.5 % by mole,ZnO:17.0～22.0 % by mole, CuO:4.5～15.0 % by mole. In addition, insulating barrier 16Middle use category of glass pottery. As this category of glass pottery can use borate glass, zinc glass,Lead glass etc.
Magnetic antenna of the present invention as shown in Figure 3, can have IC core on insulating barrier 16The terminal that sheet can connect, adopts mode in parallel or series connection to connect this terminal and IC chip connectsConnecting terminal 18 one are fired formation. In addition, can be also that being provided with can on insulating barrierThe terminal of variodenser adopts mode in parallel or series connection to be connected with winding wiring terminal. And,In the present invention, as electrode material, the most applicable use silver paste (Agpaste), also can makeWith other Ag alloy cream etc., metallic conductivity cream.
Below, the present invention with read write line according to the most applicable RFID label of Fig. 9～Figure 13 explanationThe embodiment of the magnetic antenna that relates to of the four～seven main points.
Magnetic antenna of the present invention is the antenna that sends magnetic field composition for receiving, as institute in Fig. 9A kind of mode of showing, the magnetosphere 21 that utilizes flat shape to be formed as square or rectangle forms lineCircle. This coil has many according to substantially impartial interval in the situation that overlooking it with radial configurationIndividual. One end of each coil interconnects by magnetosphere at the center of radiation shape, in addition,The other end of each coil is open towards the outside of radiation shape. One end of each coil is according to itThe mode that polarity is identical adopts series connection (with reference to Figure 11 and Figure 12) or parallel connection (with reference to figure13) mode interconnects. On one or two in the top and bottom of the coil in the time overlookingBe provided with insulating barrier 23, and, conductive layer 24 had in the arranged outside of an insulating barrier 23.
In addition, magnetic antenna of the present invention is the antenna that sends magnetic field composition for receiving, as figureAlternate manner shown in 10, by the magnetosphere 21 of square or rectangle similar to the aboveForm coil, this coil is joined with radial according to substantially impartial interval in the situation that overlooking itBe equipped with multiple. One end of each coil is towards the open center of radiation shape, on the other hand, eachThe other end of individual coil passes through magnetic towards the outside of radiation shape and in the annulus portion of outer circumferential sideLayer connects. The other end of each coil adopts series connection or in parallel according to the identical mode of its polarityMode interconnect. One or two in the top and bottom of the coil in the time overlooking are provided withInsulating barrier 23, and, conductive layer 24 had in the arranged outside of an insulating barrier 23.
Above-mentioned each magnetic antenna utilizes the manufacture of LTCC technology to form, and forms the magnetosphere of coil21 have the layer structure of individual layer or multilayer, the each layer of magnetic powder by mixing pre-burned and bondingAgent and form tabular (sheet). On magnetosphere 21, offer through hole, in through hole, inject electricityUtmost point material. In addition, with two faces of the orthogonal magnetosphere 21 of through hole on utilize electrode material shapeBecome electrode layer. And the magnetosphere 21 that comprises electrode layer is comprising by the prolongation at through hole centerPosition on line connects and forms coil structure. , utilize through hole cross section to form coil electrode 26.Now, in order at three hub of a spools that form radiation shape, magnetosphere to be connected, and retain lineEnclose the eleven punch 11 of partly going forward side by side. Be shaped magnetosphere 21(coil) from above and below be insulatedLayer 23 is clamped. Be configured in insulating barrier 23 above the magnetosphere that is printed with electrode layer to coverThe shape of electrode layer 24 is perforated. And, the insulating barrier 23 below magnetosphere 21 more underFace position is provided with the conductive layer 24 being made up of the material identical with electrode material. As each lineEnclose sheet (monolithic) and be cut off, and being fired formation by one.
Adopt the magnetic antenna of aforesaid way formation as previously mentioned, the flat shape shape of magnetosphere 21The coil of squarely or rectangle has an end of multiple, all coils with radial configurationConnect by magnetosphere 21, the other end is open. Become identical mode with the polarity of each coilConnect or be connected in parallel. So the polarity of each relative coil is identical, like this, magnetic field27 compositions parallel with metal covering are eliminated (with reference to Figure 11), and only obtain vertical with metal coveringComposition (with reference to Fig. 9 and Figure 10).
In addition, in magnetic antenna of the present invention, in the coil top and bottom that are printed with electrode layer 24Insulating barrier 23 or the insulating barrier 23 of the face of a side contrary to the face that is provided with conductive layer 24 onThrough hole is set, and injecting electrode material in this through hole, then with top and the terminal two ends of coilConnect, for this reason, also can utilize on the surface of insulating barrier 23 electrode material printed coil terminalsSon 29. In addition, also can be at the arranged outside magnetosphere 25 of conductive layer 24. At conductive layer 24Arranged outside be magnetic in layer 25 situation, compared with only having the situation of conductive layer 24, energyThe variation of the resonant frequency while enough making to paste magnetic antenna on metal covering is less. In addition, at thisIn the magnetic antenna of invention, also can arrange absolutely in the magnetospheric more lateral in conductive layer 24 outsidesEdge layer. Like this, in the lamination structure that comprises coil, can be equilibrated at the stress that interlayer produces,And reduce distortion with this.
In addition, in magnetic antenna of the present invention, in order to become the circuit shown in Figure 11～Figure 13,With respect to clamp coil top and bottom insulating barrier 23 above, be provided with seal in the mode clampingBrush the insulating barrier that forms capacitor 28 after square, circular electrode, the electricity of above-mentioned capacitor 28The utmost point also can be according to (with reference to Figure 11 and Figure 13) in parallel with winding wiring terminal electrode 29 orThe mode of person's series connection (with reference to Figure 12) connects.
And, in order to become the circuit shown in Figure 11～Figure 13, also can be with respect to clipping coilInsulating barrier 23 above, form capacitor by printing parallel pole or comb poles28, and with winding wiring terminal 29 parallel connections (with reference to Figure 11 and Figure 13) or connect (ginsengAccording to Figure 12) connect. Concrete printed pattern example as shown in Figure 6. Capacitor 28 can be bothThe parallel flat structure that clips insulating barrier 23 can be also the planar configuration of comb shape or parallel pole.In addition,, if adopt parallel flat structure, an electrode for capacitors also can have IC chip concurrentlySplicing ear.
Same in the magnetic antenna that magnetic antenna of the present invention and above-mentioned the first～three main points relate toSample, is in magnetosphere 21, to use Ni-Zn based ferrite magnet, and fires to make by oneMake. The composition of ferrite powder, ferritic firing temperature are also same with above-mentioned magnet antennaSample. In addition, the composition of insulating barrier 23 is also same with above-mentioned magnet antenna, with above-mentioned magnetAntenna is same, can in insulating barrier 23, use category of glass pottery.
Magnet antenna of the present invention is same with above-mentioned magnet antenna, also can be on insulating barrier 23The terminal construction that mask has IC chip to connect, this terminal is in parallel with winding wiring terminal 29Or be connected in series. In addition, same with above-mentioned magnetic antenna, as electrode material, use(Agpaste) is the most applicable for silver paste, but also can use other silver alloy cream etc., metallic conductionProperty cream.
Embodiment
Following embodiment is applied to the generally IC-card of widely used 13.56MHzExample in formula tag system time. First, illustrate that the first～three main points of the present invention are relatedEmbodiment (embodiment 1～6) and the comparative example that compares with the it (ratio of magnetic antennaExample 1,2).
Embodiment 1
Utilize LTCC technology manufacture magnet antenna of the present invention. First, produce magnetosphere 15.In the manufacturing process of magnetosphere 15, after using ball mill to be blended in to fire at 900 DEG C of temperatureMagnetic susceptibility when 13.56MHz is 100 Ni-Zn-Cu ferrite prefiring powder (Fe2O3：48.5% by mole, NiO:25 % by mole, ZnO:16 % by mole, CuO:10.5 % by mole. ) 100Component (unit of weight), butyral (butyral) resin 8 components (unit of weight), plasticizer5 components (unit of weight), solvent 80 components (unit of weight) are manufactured slurry. Use is scrapedSheet (doctorblade) is coated in obtained slurry (slurry) on PET film, withThe length of side is that the mode that the square of 150mm and the thickness while firing are 0.1mm is carried out sheet material(sheet) moulding.
In addition, in the manufacturing process of insulating barrier 16, same as described above, use ball mill to mixZn-Cu ferrite prefiring powder (Fe2O3: 48.5 % by mole, ZnO:41 % by mole, CuO:10.5% by mole) 100 components, butyral resin 8 components, plasticizer 5 components, solvent 80 componentsManufacture slurry. Use scraping blade that obtained slurry is coated on PET film, according toThe size identical with magnetosphere and thickness carry out sheet forming.
Below, as shown in Figure 1, the raw cook of 5 formation magnetospheres 15 of lamination (greensheet:Untreated sheet material), offer through hole 11 thereon and fill therein silver paste, and, with logicalOn orthogonal two faces in hole 11, print silver paste, form thus coil 14. And, as shown in Figure 2,Form the raw cook of insulating barrier 16 in the top and bottom of coil 14 lamination. Then, use silver paste to continueLamination is printed with the raw cook as insulating barrier 16 of conductive layer 17 on a face.
Then, together above-mentioned each raw cook is carried out to pressurized adhesion, in through hole 11 and coil open endAfter face 13 places cut off, at 900 DEG C of temperature, one is fired two hours, so, produceBe of a size of horizontal 18mm × vertical 4mm, the coil windings number of turn is the magnetic antenna (sample 1) of 32 circles.(wherein, for simplicity of illustration, in Fig. 1 and Fig. 2, represent coil windings number with 7 circles,In addition, magnetospheric laminated sheet number is expressed as 3 layers. Other accompanying drawing too).
, connect RFID label IC at the coil two ends of above-mentioned magnetic antenna below, and alsoConnection connects IC and capacitor, and resonant frequency is adjusted into 13.1MHz, makes RFID label.By RFID label sticking, on metallic plate, mensuration is output as the read write line of 10mW and can communicates by letterDistance. Also determine in addition the distortion of magnetic antenna. Each assay method is as described below.
(mensuration of resonant frequency and method of adjustment)
For resonant frequency, (Hewlett-Packard company manufactures (ヒ ユ mono-to impedance analysis deviceレ Star ト パ Star カ mono-ド She System), name of product: 4291A) be connected with 1 circle coil, andIt is combined, using the crest frequency of measured impedance as resonant frequency with RFID label. In addition,This adjustment is the position of the coil electrode that exposes of the end face by being chosen in above-mentioned magnetic antenna, andAdjusting impedance carries out. Can adjust by changing the electric capacity of the capacitor being connected in parallel with ICJoint resonant frequency.
(assay method of communication distance)
For communication distance, it is read write line (the FEC strain that level is fixedly output as 10mWFormula commercial firm (エ of Co., Ltd. Off イ mono-シ mono-) produce, name of product: URWI-201) skyLine, makes to stick on RFID label level on metallic plate and is placed in the top of above-mentioned antenna, andIn the scope that can communicate with 13.56MHz, make RFID label move, measure sky nowThe ultimate range of the vertical direction of line and RFID label is as communication distance.
(assay method of distortion)
Dial ga(u)ge (dialgauge) (three rich (the ミ Star ト of tabular measurement point will be there areヨ) dial ga(u)ge ID-C112) be arranged on (three rich BSG-20) on testing stand, at price fixingUpper by after 0 of dial ga(u)ge adjustment, magnetic antenna is clipped in to price fixing and tabular measurementBetween point, usage degree disk indicator is measured peak, deducts use vernier calliper from this heightThe thickness of the magnetic antenna that chi (Nonius) (three rich slide measure CD-C) is measured, thus calculateGo out distortion value.
Measure the result of resonant frequency, communication distance and distortion according to above-mentioned the whole bag of tricks, onThe distortion of stating in magnetic antenna is 0.6mm, belongs to usage range. Use the RFID of magnetic antennaLabel is little in the resonant frequency variation that is pasted on the front and back on metallic plate, for+1MHz, and,Under the state being pasted on metal covering, can obtain the communication distance of 3cm.
Embodiment 2
Use the raw cook as magnetosphere 15 similarly to Example 1 and replace Zn-Cu ironThe raw cook as insulating barrier 16 that oxysome uses category of glass pottery to form. As shown in Figure 3, lamination5 form the raw cook of magnetosphere 15, and offer through hole 11 thereon and fill therein silver paste, andAnd, with orthogonal two faces of through hole 11 on print silver paste, so form coil 14.
Below, the raw cook of lamination formation insulating barrier 16 on a face of coil 14. Now,On insulating barrier 16, use silver paste printed conductive layer 17. In addition, on another face of coil 14Other insulating barrier 16 of lamination, on this insulating barrier 16, in order to be connected with the two ends of coil 14And offer through hole 11, and fill therein silver paste, and, with orthogonal this insulation of through hole 11The top layer of layer, utilizes silver paste printed coil lead terminal 19 and the IC chip link that is connected ICSon 18.
Then, together each above-mentioned raw cook is carried out to pressurized adhesion, open at through hole 11 and coilAfter putting end face 13 places cut-out, at 900 DEG C of temperature, one is fired two hours, so, justMake and be of a size of horizontal 18mm × vertical 4mm, the coil windings number of turn is the magnetic antenna (sample of 32 circlesProduct 2).
Similarly to Example 1, connect RFID at the coil two ends of above-mentioned magnetic antenna below,Label IC, and be connected in parallel IC and capacitor, be adjusted into 13.1MHz by resonant frequency,Thereby make RFID. Then, attaching rfid on metallic plate, measures use and is output as 10mWRead write line distance, the resonant frequency that can communicate by letter. In addition, measure the distortion of magnetic antenna.Consequently, the distortion in above-mentioned magnetic antenna is 1.0mm, belongs to usage range. Use magneticThe RFID label of property antenna is 14.1MHz at the resonant frequency being pasted under metallic plate state,The resonant frequency variation that is pasted on the front and back on metallic plate is less, for+1MHz. In addition, stickyBe affixed on the communication distance that can obtain 3.1cm under the state on metal covering.
Embodiment 3
Use similarly to Example 1 as the raw cook of magnetosphere 15 and as insulating barrier 16Raw cook. As shown in Figure 4,5 of laminations form the raw cook of magnetosphere 15, offer logical thereonSilver paste is also filled wherein in hole 11, and, with the orthogonal two sides of through hole 11 on print silver paste,So form coil 14.
Form the raw cook of insulating barrier 16 below, at the lower laminated of coil 14. Now, absolutelyOn edge layer 16, utilize silver paste printed conductive layer 17. And, do at the lower laminated of insulating barrier 16For the raw cook of magnetosphere 15. On coil 14, lamination forms the raw cook of insulating barrier 16. ?Above this insulating barrier 16, offer through hole 11 in order to be connected with the two ends of coil 14, andFill therein silver paste, and, with the top layer of orthogonal this insulating barrier of through hole 11, utilize silverCream printed coil lead terminal 19 and the IC chip splicing ear 18 that is connected IC.
Then, together each above-mentioned raw cook is carried out to pressurized adhesion, open at through hole 11 and coilAfter putting end face 13 places cut-out, similarly to Example 1, fire by one, thereby make chiVery little is that horizontal 18mm × vertical 4mm, the coil windings number of turn are the magnetic antenna (sample 3) of 32 circles.
Below, similarly to Example 1, at the IC of above-mentioned magnetic antenna chip splicing ear 18Upper connection RFID label IC, and be connected in parallel IC and capacitor, by resonant frequency adjustmentFor 13.1MHz, thereby make RFID. Then, attaching rfid on metallic plate, mensuration makesDistance, the resonant frequency that can communicate by letter with the read write line that is output as 10mW. In addition, measure magneticThe distortion of property antenna. Consequently, the distortion in above-mentioned magnetic antenna is 0.8mm, belongs to realUse scope. Use the RFID label of magnetic antenna being pasted on the resonance frequency of the front and back on metallic plateRate variation is+0.5MHz to belong to less variation. In addition, at the state being pasted on metal coveringCan obtain down the communication distance of 3.3cm.
Embodiment 4
Use similarly to Example 1 as the raw cook of magnetosphere 15 and as insulating barrier 16Raw cook. As shown in Figure 5,5 of laminations form the raw cook of magnetosphere 15, offer logical thereonSilver paste is also filled therein in hole 11, and, with orthogonal two faces of through hole 11 on printed silverCream, so form coil 14.
Form the raw cook of insulating barrier 16 below, at two of the lower laminateds of coil 14. Now,Below insulating barrier 16 on utilize silver paste printed conductive layer 17. Then, at two insulating barriers16 more lower laminated forms the raw cook of magnetosphere 15, and in its lower section lamination as insulating barrier16 raw cook. In addition, on coil 14 on the insulating barrier 16 of a side, for coilOne end of 14 connects and offers through hole 11 and fill therein silver paste, and, with through hole 11The top layer of this orthogonal insulating barrier, utilizes silver paste printed coil lead terminal 19 and is connected IC'sIn IC chip splicing ear 18 one. And, the insulating barrier of a side on coil 14On 16, offer through hole in order to be connected with the other end of coil 14 and multiple places of centre11, and fill therein silver paste, and, with the top layer of orthogonal this insulating barrier of through hole 11,Utilize silver paste printed coil lead terminal 19 and the IC chip splicing ear 18 that is connected IC. CoilDraw with mutual relative shape lead terminal 19 its ends.
Then, together each above-mentioned raw cook is carried out to pressurized adhesion, open at through hole 11 and coilAfter putting end face 13 places cut-out, at 900 DEG C of temperature, one is fired two hours, so, justMake and be of a size of horizontal 18mm × vertical 4mm, the coil windings number of turn is the magnetic antenna (sample of 32 circlesProduct 4).
Below, similarly to Example 1, at the IC of above-mentioned magnetic antenna chip splicing ear 18Upper connection RFID label IC, and use conductive coating paint etc. makes relative coil leadBeing short-circuited between end face arbitrarily of terminal 19, regulates impedance and resonant frequency is adjusted into13.1MHz, thus RFID made. Then, attaching rfid on metallic plate, measures use defeatedGo out distance, the resonant frequency that can communicate by letter for the read write line of 10mW. In addition, measure magnetic skyThe distortion of line. Consequently, the distortion in above-mentioned magnetic antenna is 1.0mm, belongs to minimumNumerical value. Use the RFID label of magnetic antenna at the resonant frequency that is pasted on the front and back on metallic plateVariation is+0.5MHz in addition, can obtain the logical of 3.4cm under the state being pasted on metal coveringCommunication distance.
Embodiment 5
Use similarly to Example 1 as the raw cook of magnetosphere 15 and as insulating barrier 16Raw cook. As shown in Figure 6,5 of laminations form the raw cook of magnetosphere 15, offer logical thereonSilver paste is also filled therein in hole 11, and, with orthogonal two faces of through hole 11 on printed silverCream, so form coil 14.
Then, form the raw cook of insulating barrier 16 at two of the lower laminateds of coil 14. Now,Below insulating barrier 16 on utilize silver paste printed conductive layer 17. Lamination is as magnetic in its lower sectionThe raw cook of layer 15. In addition, on coil 14, a side lamination is as magnetosphere 15 and absolutelyThe raw cook of edge layer 16. Now, the raw cook of the insulating barrier 16 of a side on form coil 14Upper, to offer through hole 11 in order being connected with the two ends of coil 14 and to fill therein silver paste,And, with the top layer of orthogonal this insulating barrier of through hole 11, utilize silver paste printed capacitor electrode1C. In addition, on form it, on the raw cook of the insulating barrier 16 of a side, printing IC chip connectsTerminal 18 forms capacitor between this IC chip splicing ear 18 and electrode for capacitors 1C.
Then, together each above-mentioned raw cook is carried out to pressurized adhesion, open at through hole 11 and coilAfter putting end face 13 places cut-out, at 900 DEG C of temperature, one is fired two hours, so just makeBecome to be of a size of horizontal 18mm × vertical 4mm, the coil windings number of turn is the magnetic antenna (sample of 32 circlesProduct 5).
On the IC of above-mentioned magnetic antenna chip splicing ear 18, connect RFID label below,With IC, ream a part for IC chip splicing ear 18, adjust electrostatic capacitance and will resonate frequentlyRate is adjusted into 13.1MHz, thereby makes RFID. Then, attaching rfid on metallic plate,Measure the distance, the resonant frequency that use the read write line that is output as 10mW to communicate by letter. In addition,Measure the distortion of magnetic antenna. Consequently, the distortion in above-mentioned magnetic antenna is 0.1mm,Belong to minimum numerical value. Use the RFID label of magnetic antenna in the front and back that are pasted on metallic plateResonant frequency variation less, be+0.5MHz, in addition, under the state being pasted on metal coveringCan obtain the communication distance of 3.3cm.
Embodiment 6
Produce the raw cook that forms magnetosphere 15. First,, after 900 DEG C fire, utilize ballThe Ni-Zn-Cu ferrite prefiring powder (Fe that the magnetic susceptibility of grinding machine mixing 100MHz is 202O3：48.5 % by mole, NiO:39 % by mole, ZnO:2 % by mole, CuO:10.5 % by mole) 100Component, butyral resin 7 components, plasticizer 3 components, solvent 100 components are manufactured bondingLiquid. Use scraping blade that obtained slurry is coated on PET film, and carry out slice forming.
In addition, make the raw cook that forms insulating barrier 16. This raw cook also, with above-mentioned same, utilizes ballGrinding machine mixing Zn-Cu ferrite prefiring powder (Fe2O3: 48.5 % by mole, ZnO:40 % by mole,CuO:11.5 % by mole) 100 components, butyral resin 7 components, plasticizer 3 components, moltenAgent 100 components are manufactured slurry, then use scraping blade that this slurry is coated in to PET filmUpper, and carry out sheet forming.
Below, as shown in Figure 7,5 raw cooks as magnetosphere 15 of lamination, offer thereinThrough hole 11 is also filled silver paste therein, and, with orthogonal two surface printings of through hole 11Silver paste, so form coil 14. In the top and bottom of a coil 14 side lamination as insulating barrier 16Raw cook, a side continues lamination and is printed with the insulating barrier 16 of conductive layer 17 with silver paste in its lower section.
Then, together each above-mentioned raw cook is carried out to pressurized adhesion, open at through hole 11 and coilAfter putting end face 13 places cut-out, at 900 DEG C of temperature, one is fired two hours, so just makeOne-tenth is of a size of horizontal 18mm × vertical 4mm, the coil windings number of turn is the magnetic antenna (sample of 50 circles6）。
, connect FM radio 1R at the coil two ends of above-mentioned magnetic antenna below, and in parallelConnecting coil 14 and capacitor, be adjusted into 82MHz by resonant frequency, thereby broadcast as FMReception antenna. Imagination is the arranged outside antenna at metal shells such as mobile phones, still,On metallic plate, paste above-mentioned magnetic antenna and attempt receiving FM broadcast (82MHz), obtain goodAccepting state. Distortion by mensuration magnetic antenna is known, and distortion is very little, is only 0.6mm.
Comparative example 1
As shown in Figure 8, except conductive layer 17 this point that do not possess in embodiment 1, adoptMode is similarly to Example 1 manufactured magnetic antenna (sample 7). Then, same with embodiment 1Sample, connects RFID label IC at the coil two ends of above-mentioned magnetic antenna, and, in parallel companyConnect IC and capacitor, and resonant frequency is adjusted into 13.1MHz, thereby make RFID label.Then, attaching rfid tag on metallic plate, similarly to Example 1, mensuration can be communicated by letterDistance, resonant frequency, measure the distortion of magnetic antenna in addition. Consequently, above-mentioned magnetic skyDistortion in line is 1.0mm. Use the RFID label of magnetic antenna being pasted on metallic plateThe resonant frequency variation of front and back becomes extremely large+1.5MHz, in addition, is pasted under the state on metallic plateCommunication distance be only also 1.4cm.
Comparative example 2
Contrast as a comparison, for the sky with the wiring of whirlpool shape on the resin surface of film-formThereby the two ends of line coil connect the common IC-card formula label (Texas on the market that IC formsInstruments Texas Instruments manufactures (テ キ サ ス イ Application ス Star Le メ Application ツ She System), producesProduct title: Tag-itTMHF), sticked on metallic plate, then according to same with embodiment 1The mode of sample is measured communication distance. Consequently, be pasted on the communication distance under metallic plate stateFor 0.1cm, the resonant frequency being pasted on after metallic plate is not observed.
Measurement result in above-mentioned each embodiment and comparative example is as shown in the table.
Table 1
Illustrate that the embodiment of the magnetic antenna that the four～seven main points of the present invention relate to is (real below,Execute example 7,8) and the comparative example (comparative example 3,4) corresponding with it.
Embodiment 7
Utilize LTCC technology to manufacture magnetic antenna of the present invention. First, make magnetosphere 21.In the manufacture process of magnetosphere 21, similarly to Example 1, use ball mill mixed ferritePre-burning powder, butyral resin, plasticizer, solvent are manufactured slurry, similarly to Example 1Obtained slurry is carried out to sheet forming. In addition, make similarly to Example 1 insulating barrier23. , insulating barrier 23 similarly to Example 1, uses ball mill mixing Zn-Cu ferrite pre-Burning powder, butyral resin, plasticizer, solvent are manufactured slurry, and similarly to Example 1Obtained slurry is carried out to sheet forming.
Below, 5 of laminations form the raw cook of magnetosphere 21, offer through hole thereon also thereinFill after silver paste, on the orthogonal face of two raw cooks and through hole, printing formation coil electrode 22Silver paste. Then, these 5 raw cooks are bored a hole. Now, comprising leading to by raw cookPosition perforation on the extended line of the line at Kong center, and in order to form three of radiation shapeIndividual hub of a spool is connected with magnetosphere and leaves coiler part. Secondly, utilize coil electrode to be printedBrush 2 raw cooks are in its surface clamped remaining 3 raw cooks and are carried out lamination, so form threePolar curve circle. By silver paste printed conductive layer 24, will bore a hole according to the shape identical with magnetosphereBelow coil, and make conductive layer 24 be positioned at outside as the raw cook lamination of insulating barrier 23.
Then, together each above-mentioned raw cook is carried out to pressurized adhesion, and, as eachAfter loop piece (monolithic) is cut off, at 900 DEG C, one is fired two hours, so just makeA loop length is that 20mm, each coil turn are the magnetic antenna (sample 8) of 10 circles.In Fig. 9, represent the skeleton diagram of obtained magnetic antenna. Moreover, in the drawings, reduced representation lineThe number of turn of circle etc.
Then, connect RFID label read write line at the coil two ends of above-mentioned magnetic antenna, andAdopt parallel way to connect read write line and capacitor, resonant frequency is adjusted to 13.56MHz, willIt is pasted on the communication distance of then measuring it and RFID label on metallic plate. In addition, resonance frequentlyThe assay method of the mensuration of rate and method of adjustment, communication distance is as follows.
(mensuration of resonant frequency and method of adjustment)
For resonant frequency, (Hewlett-Packard company manufactures impedance analysis device, ProductNameClaim: 4291A) be connected with 1 circle coil, and it be combined with RFID label, with measuredThe crest frequency of impedance as resonant frequency. In addition, its adjustment is by changing parallel connection or stringThe electric capacity of the capacitor that connection connects carries out.
(assay method of communication distance)
Communication distance be take off be output as 10mW read write line (TAKAYA Co., Ltd. produce,Name of product: D002A) standard antenna, connect magnetic antenna of the present invention and by its levelFixing, by RFID label (TexasInstruments Texas Instruments manufactures IC-card formula label,Name of product: Tag-it(TM) HF) level side placed on it, meanwhile, at 13.56MHzMobile RFID in the scope that can communicate by letter down, with antenna now and RFID label vertical directionUltimate range is measured as communication distance.
The resonant frequency of measuring according to above-mentioned each method and the result of communication distance are: useThe read write line of above-mentioned magnetic antenna is little in the resonant frequency variation that is pasted on metallic plate front and back, for+ 1MHz, and, the communication distance of 3cm under the state being pasted on metal covering, obtained.
Embodiment 8
Use the raw cook as magnetosphere 21 similarly to Example 7 and replace Zn-Cu ironThe raw cook as insulating barrier 23 that oxysome uses category of glass pottery to form. 5 of laminations form magneticThe raw cook of layer 21, offers through hole thereon and fills therein silver paste. Then, with 2 lifesOn the orthogonal face of the through hole of sheet, printing forms the silver paste of coil electrode 22.
Then, 5 raw cooks are bored a hole. Now, comprise through hole by raw cook inPosition perforation on the extended line of the line of the heart, and for three coils forming radiation shapeThe annulus portion of periphery be connected with magnetosphere and leave coiler part. Secondly, utilize coil electrodeBe printed on its lip-deep 2 raw cooks and clamp remaining 3 raw cooks and carry out lamination, so shapeBecome three polar curve circles. By silver paste printed conductive layer 24, using as the raw cook of insulating barrier 23 with discoidLamination, below coil whole, and makes conductive layer 24 be positioned at outside, in addition, and according to sameMode in its lower section lamination as the raw cook of magnetosphere 25.
Then, together each above-mentioned raw cook is carried out to pressurized adhesion, and, as eachAfter loop piece (monolithic) is cut off, at 900 DEG C, one is fired two hours, so justMaking a diameter is that 10mm, each coil turn are the magnetic antenna (sample 9) of 7 circles.In Figure 10, represent the skeleton diagram of obtained magnetic antenna. Moreover, in the drawings, reduced representation lineThe number of turn of circle etc.
Then, connect RFID label read write line at the coil two ends of above-mentioned magnetic antenna, andAdopt mode in parallel or series connection to connect read write line and capacitor, resonant frequency is adjusted to13.56MHz, measures resonant frequency and is pasted on metal according to mode similarly to Example 7On plate time and the communication distance of RFID label. Its result is: use the read-write of above-mentioned magnetic antennaDevice, very little in the resonant frequency variation that is pasted on metallic plate front and back, for+0.5MHz, and,Be pasted on the communication distance that obtains 3.4cm under the state on metal covering.
Comparative example 3
Except omitting conductive layer 24 this point shown in Fig. 9, all according to identical with embodiment 7Technique manufacture magnetic antenna (sample 10). Coil two ends at this magnetic antenna connect RFIDLabel read write line, and adopt mode in parallel or series connection to connect read write line, will resonate frequentlyRate is adjusted into 13.56MHz, mode similarly to Example 7 measure resonant frequency variation andWhile being pasted on metallic plate and communication distance RFID label. Consequently, be pasted on metalBe changed to+the 2.3MHz of the resonant frequency before and after plate, the communication distance while being pasted on metallic plate stateFor 1.6cm.
Comparative example 4
Contrast as a comparison, commercially available by what connect up with whirlpool shape on tabular resin surfaceRead write line is pasted on metallic plate with antenna, then measures the communication distance with RFID label. My godLine is of a size of 30mm × 55mm, and coil turn is 3 circles. Consequently, be pasted on metalCommunication distance when board status is 0.5cm.
Claims (11)
1. a magnetic antenna, it forms in order to receive and dispatch magnetic field components utilising LTCC technology manufacture,It is characterized in that:
At mictomagnetism powder and adhesive and with the individual layer of tabular shaping or the magnetic of multi-ply constructionOn property layer, offer through hole, injecting electrode material in this through hole, and, orthogonal with through holeMagnetospheric two faces on utilize electrode material form electrode layer, by through hole center positionPut and run through magnetosphere, thus, with center and the magnetosphere of three coils at formation radiation shapeConnect mode form coil, utilize insulating barrier from above and below clamp this coil magneticLayer, and the insulating barrier being configured in above magnetosphere is to wear with the shape of covers electrode layerThe insulating barrier in hole, the insulating barrier below magnetosphere more below be provided with adopt and electrode materialThe conductive layer that identical material forms, and form or one is fired by being cut into fire after monolithicAfter formation, be cut into monolithic and manufacture, the magnetosphere that is square or rectangle by flat shape formsMultiple coils are radial configuration with impartial interval under the state of overlooking, and, forMake its polarity identical, one end of each coil adopts series connection or in parallel at the center of radiation shapeMode interconnect by magnetosphere, the other end of each coil is towards the outside of radiation shapeOpen.
2. a magnetic antenna, it forms in order to receive and dispatch magnetic field components utilising LTCC technology manufacture,It is characterized in that:
At mictomagnetism powder and adhesive and with the individual layer of tabular shaping or the magnetic of multi-ply constructionOn property layer, offer through hole, injecting electrode material in this through hole, and, orthogonal with through holeMagnetospheric two faces on utilize electrode material form electrode layer, by through hole center positionPut and run through magnetosphere and form coil, utilize insulating barrier from above and below clamp the magnetic of this coilProperty layer, and the insulating barrier being configured in above magnetosphere is with the shape of covers electrode layerThe insulating barrier of perforation, being provided with and adopting and electrode material more below of the insulating barrier below magnetosphereExpect the conductive layer that identical material forms, and manufacture by being cut into fire to form after monolithic, byFlat shape is multiple coils that the magnetosphere of square or rectangle forms, under the state of overlookingBe radial configuration with impartial interval, and one end of each coil is towards radiation shapeCenter one side is open, and the other end of each coil is towards the outside of radiation shape, and in order to makeIts polarity is identical and interconnect by magnetosphere in the annulus portion of outer circumferential side.
3. magnetic antenna as claimed in claim 1 or 2, is characterized in that:
On the insulating barrier of the face of a side contrary to the face that is provided with conductive layer, be provided with through hole, at thisInjecting electrode material in through hole and being connected with the two ends of coil, utilizes electrode material to print on its surfaceBe brushed with coil lead terminal.
4. magnetic antenna as claimed in claim 1 or 2, is characterized in that:
Lateral surface at conductive layer is provided with magnetosphere.
5. magnetic antenna as claimed in claim 4, is characterized in that:
Magnetospheric lateral surface in the lateral surface setting of conductive layer is provided with insulating barrier.
6. magnetic antenna as claimed in claim 1 or 2, is characterized in that:
On the insulating barrier of top and bottom of clamping coil, the mode that is provided with to clamp is printedThere is square, circular electrode and be formed with the insulating barrier of capacitor, adopt side in parallel or series connectionFormula connects electrode and the coil lead terminal electrode of capacitor.
7. magnetic antenna as claimed in claim 1 or 2, is characterized in that:
On clamp the insulating barrier of coil, print parallel pole or comb poles and form electricityContainer, adopts mode in parallel or series connection to connect this capacitor and coil lead terminal.
8. magnetic antenna as claimed in claim 1 or 2, is characterized in that:
Described magnetosphere is formed by Ni-Zn based ferrite.
9. magnetic antenna as claimed in claim 1 or 2, is characterized in that:
Described insulating barrier is formed by Zn based ferrite.
10. magnetic antenna as claimed in claim 1 or 2, is characterized in that:
Described insulating barrier is formed by category of glass pottery.
11. magnetic antennas as claimed in claim 1 or 2, is characterized in that:
The terminal that can connect IC chip on described insulating barrier, is equipped with, adopt in parallel orThe mode of person's series connection connects this terminal and coil lead terminal.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005199451A JP4821965B2 (en) | 2005-07-07 | 2005-07-07 | Magnetic antenna |
| JP2005-199451 | 2005-07-07 | ||
| JP2005206254A JP2007028114A (en) | 2005-07-14 | 2005-07-14 | Magnetic material antenna |
| JP2005-206254 | 2005-07-14 |
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| CN200680023105.2A Division CN101208830B (en) | 2005-07-07 | 2006-07-06 | Magnetic antenna |
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| CN103094667A CN103094667A (en) | 2013-05-08 |
| CN103094667B true CN103094667B (en) | 2016-06-15 |
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| CN201310002009.1A Active CN103094667B (en) | 2005-07-07 | 2006-07-06 | Magnetic antenna |
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| EP (1) | EP1901394B1 (en) |
| KR (1) | KR101274354B1 (en) |
| CN (1) | CN103094667B (en) |
| WO (1) | WO2007007639A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR101274354B1 (en) | 2013-06-13 |
| WO2007007639A1 (en) | 2007-01-18 |
| KR20080023694A (en) | 2008-03-14 |
| EP1901394A4 (en) | 2012-09-26 |
| EP1901394A1 (en) | 2008-03-19 |
| CN103094667A (en) | 2013-05-08 |
| EP1901394B1 (en) | 2016-08-31 |
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