CN101501930A - Antenna element and method for manufacturing same - Google Patents
Antenna element and method for manufacturing same Download PDFInfo
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- CN101501930A CN101501930A CNA2007800300292A CN200780030029A CN101501930A CN 101501930 A CN101501930 A CN 101501930A CN A2007800300292 A CNA2007800300292 A CN A2007800300292A CN 200780030029 A CN200780030029 A CN 200780030029A CN 101501930 A CN101501930 A CN 101501930A
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- antenna
- antenna assembly
- magnetic element
- distribution
- magnetic
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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
- H01Q1/12—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
-
- 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
-
- 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
-
- 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
Abstract
Provided is an antennal element which is to be used for a tag configuring a RFID (Radio Frequency Identification) system and can be easily manufactured. An antenna element (10) is provided with (A) a layer-like magnetic element (20) formed of a magnetic composition including a magnetic material and a polymer material, and (B) an antenna wiring (30) arranged on one surface of the layer-like magnetic element.
Description
Technical field
The present invention relates to a kind of antenna assembly, relate in particular to a kind of antenna assembly that can in the equipment that is used for RFID (radio-frequency (RF) identification) system, use, for example can be used in the antenna assembly in the IC tag or be used for the antenna assembly of read/write device.In addition, the present invention relates to a kind of electronic equipment with such antenna assembly, for example wireless identification tag or IC tag (it also can be a cellular phone), and be used for read/write device by its transmission.
Background technology
Rfid system has begun to be used in the multiple field and has shown their facility.As a result, people expect that rfid system can be used in other many fields to utilize their facility.On the other hand,, pointed out various problems, therefore wished the scheme that achieves a solution from now on for the technology relevant with rfid system.
One of these problems are about the problem as included antenna such as the label that is used to form the unit of rfid system, read/write device.By utilizing electromagnetic induction effect, described antenna is used for signal transmission and/or power supply.
Known that such antenna is subjected to the influence of its environment of placing very big.Particularly, if there is metal to appear near the antenna, then flow on the metal surface of vortex flow in read/write device that the magnetic flux that is produced by antenna causes.Therefore, carrier wave is obviously decayed, and for label, the intensity of the magnetic flux of the antenna of flowing through can decay, and this may make communication carry out.
For the influence that suppresses to be produced by such metal, the someone proposes and will be combined with antenna by the parts that magnetic material forms.For example, the someone proposes a kind of non-contact IC card read/write device, its below antenna, be provided with the magnetic material of flexible strip form so as to prevent since metal cause to the negative effect of communication and reduce shared space (with reference to following patent documentation 1).In this read/write device, the magnetic material of antenna and sheet form is bonding with two-sided tape.
In addition, the someone proposes a kind of non-contact type data transmitter (with reference to following patent documentation 2), the lip-deep IC chip that it has antenna and is arranged on substrate has wherein been placed magnetic material layer to cover at least one in described antenna and the IC chip.In the situation of this data transmitter, it is said by covering magnetic material layer, even when contact comprises the article of metal parts, also can produce the electromotive force of enough inductions.
The manufacturing of this data transmitter be by sheet metal is pasted together with basis material on basis material, the etching conductive foil to be to form antenna pattern, the IC chip is installed, applies magnetic material and dry to solidify at last afterwards.
Patent documentation 1 Japanese Patent Laid-Open Publication 2002-298095
Patent documentation 2 Japanese Patent Laid-Open Publication 2006-113750
Summary of the invention
The problem that solves
The rfid system expectation is used in the portable electric appts (for example cellular phone) widely.For this purpose, wish to be included in more compact that antenna assembly in the label, read/write device etc. of formation system makes; Wish that also described antenna can easier manufacturing.
The means of dealing with problems
After thoroughly having studied antenna assembly, find that the problems referred to above can be solved by such antenna assembly, described antenna assembly comprises:
(A) stratiform magnetic element (for example plate shape, sheet shape or film shape), it is formed by the magnetic components that comprises magnetic material and polymeric material, and
(B) antenna distribution, it is arranged at least one surface of layered magnetic element.
The invention provides a kind of method of making antenna assembly, described antenna assembly has filmated magnetic element and antenna distribution disposed thereon, and this method comprises:
(1) obtains the step of stratiform magnetic element from the magnetic components that comprises magnetic material and polymeric material;
(2) sheet metal directly is bonded at least one lip-deep step of layered magnetic element; And
(3) has the step of the antenna distribution of given pattern by the described sheet metal formation of etching.
Use this manufacture method, can produce easily above-mentioned and below will describe according to antenna assembly of the present invention.
The present invention also provides a kind of electronic equipment, and it has as top and the following antenna assembly that will describe, particularly IC tag; The read/write device of the transmission that has the portable electric appts (for example cellular phone, notebook computer, PDA (personal digital assistant) etc.) of this IC tag and be used for carrying out with this IC tag.
Effect of the present invention
Antenna assembly of the present invention has the antenna distribution that directly is attached on the stratiform magnetic element.Therefore, between antenna distribution and stratiform magnetic element,, and do not need other elements (for example substrate), thereby this antenna assembly can form and therefore compacter thinner without any thing (for example, two-sided tape or come the resin bed of Autoadhesive).
In addition, in the manufacture method of antenna assembly of the present invention,, obtain to have the layered magnetic element of antenna distribution afterwards by etching, sheet metal is adhered to the stratiform magnetic element is simplified because sheet metal is directly bonded on the stratiform magnetic element.And,, can more easily make this antenna assembly owing to do not need substrate.
Description of drawings
Fig. 1 is the perspective schematic view of antenna assembly of the present invention;
Fig. 2 is the flow chart of the manufacture method of antenna assembly of the present invention;
The explanation of reference marker
10-antenna assembly; 20-stratiform magnetic element; 30-antenna distribution
Embodiment
The present invention is described in further detail below with reference to accompanying drawings.Fig. 1 illustrates the perspective schematic view of antenna assembly of the present invention.Fig. 2 illustrates the indicative flowchart according to the manufacture method of antenna assembly of the present invention.
Antenna assembly 10 of the present invention comprises the stratiform magnetic element 20 that is formed by the magnetic composite that comprises magnetic material and polymeric material, and a lip-deep antenna distribution 30 that is arranged on this stratiform magnetic element 20.This stratiform magnetic element 20 can be the appropriate format with planar extension, can be for example plate shape, sheet shape, film shape etc.Thereby term " surface " refers to limit the surface of this stretching, extension, i.e. first type surface in this manual.Stratiform magnetic element 30 has two surfaces in its both sides.Therefore, antenna assembly according to the present invention is included in the embodiment that has the antenna distribution on the side of stratiform magnetic element, and the embodiment that has the antenna distribution on the both sides of stratiform magnetic element.
Proposed multiple magnetic material, it can show antenna function (in other words, transfer function and/or function of supplying power) in antenna assembly, and these magnetic materials can be as the magnetic material that forms this stratiform magnetic element.Particularly, wish to use material, in other words, have the material of excellent magnetic permeability with ability of assembling magnetic flux.The example of preferred spendable magnetic material has: ferro-silicium; Be called ferritic magnetic material, particularly Mn-Zn ferrite, Ni-Zn ferrite; Iron-nickel alloy, particularly permalloy, Sendust; Amorphous alloy, magnetic material, especially those iron that preferably are called iron-based non-crystalline alloy are main component and the material that adds Si, B, Cu and Nb.More precisely, nano-crystal soft magnetic alloy (Finemet) of can use the IRL (trade name of TDK company) of the compound electromagnetic shielding material of the conduct of selling, selling by Hitachi Metals Co., Ltd commerce or the like by TDK company commerce.These magnetic materials can be any suitable forms, for example can be particle shape or thin slice shape.
Proposed the multiple polymers material, it can improve the antenna function (in other words, transfer function and/or function of supplying power) in the antenna assembly when combining with magnetic material, and these polymeric materials can be as the polymeric material that forms the stratiform magnetic element.Especially, wish to use those that magnetic material is not had the polymeric material of negative effect, perhaps to the polymeric material of the useful influence of magnetic material with ability of assembling magnetic flux.Say exactly, the preferred polymeric material that uses can be crystalline polymer or noncrystal shaped polymer, thermoplastic polymer for example is as polyethylene (PE), haloflex, polyphenylene sulfide (PPS), polypropylene, polyvinyl chloride, polyvinylidene fluoride, polystyrene, polyformaldehyde, ethylene vinyl acetate copolymer (EVA), ethylene-butyl acrylate copolymer (EBA), PETG (PET), nylon, acrylonitrile-butadiene-styrene-terpolymer (ABS) or the like.Thermoplastic elastomer (TPE) also can be used as polymeric material.
The magnetic composite that comprises magnetic material and polymeric material recited above can comprise these materials of any ratio, as long as antenna assembly of the present invention can show antenna function.For example, this magnetic composite comprises the magnetic material of mass ratio 60-95% and the polymeric material of mass ratio 40-5%, preferably includes the magnetic material of mass ratio 75-92% and the polymeric material of mass ratio 25-8%.This magnetic composite can, as required, comprise other composition (for example being used for plasticiser (for example chlorinated paraffin wax, epoxidized soybean oil, alkylene wax), organic/inorganic fire retardant of polymeric material or the like).
In antenna assembly of the present invention, antenna distribution 30 is arranged on the surface of stratiform magnetic element 20 for example, as shown in the figure.Among another embodiment that is described below, the antenna distribution can be arranged on the both sides of stratiform magnetic element.In arbitrary embodiment, antenna distribution 30 all is directly bonded on the stratiform magnetic element 20.It is outstanding from the surface of stratiform magnetic element that term " from the teeth outwards " refers to the antenna distribution.In addition, term " directly " refers to the antenna distribution and is connected with the stratiform magnetic element simultaneously that they are in contact with one another, in other words, and directly connection.The antenna distribution can be any suitable shape, for example shown spirality (rectangular coil shape).Other shape, for example annular, scroll, one pole shape, dipole shape, sticking patch shape, flute profile or the like also can.
Except the antenna distribution, antenna assembly of the present invention can have the electronic unit (IC chip, capacitor, chip resister or the like) and the electricity that need and connect other required any distributions.Can as required above-mentioned electronic unit and other distributions be arranged on any surface of stratiform magnetic element.In one embodiment, these electronic units and other distributions appear on the surface of stratiform magnetic element at antenna distribution place.In another embodiment, at least some electronic units and other distributions can appear on the opposite surfaces of stratiform magnetic element, in this case, through hole can be set pass the stratiform magnetic element, and conducting element (for example electroconductive resin, resin welding flux etc.) embeds in the through hole or the coat of metal of conduction is formed on the inboard of through hole, to guarantee the electrical connection between two lip-deep antenna distributions of stratiform magnetic element and electronic unit, other distributions.
As mentioned above, by according to manufacturing top and antenna assembly manufacture method of the present invention described below, and obtain in essence recited above, wherein the antenna distribution is from the outstanding structure in the surface of stratiform magnetic element.In other words, by sticking on the stratiform magnetic element as the sheet metal of the precursor of antenna distribution, the etching metal thin slice only makes the part corresponding to the antenna distribution stay then, and the result obtains such structure.
Thereby, manufacture method according to antenna assembly of the present invention comprises: sheet metal is directly bonding (for example, hot pressing) on the stratiform magnetic element so that form the step (step of Fig. 2 (2)) of antenna distribution precursor, and this sheet metal of etching has the step (step of Fig. 2 (3)) of the antenna distribution of given pattern with formation.
Can obtain the stratiform magnetic element by above-mentioned magnetic composite is formed stratiform.In a preferred embodiment, obtain the stratiform magnetic element of sheet shape by press molding or compression moulding.For example, can they obtain to have the lamelliform element of appointed thickness by fill magnetic composite and pressure/heating in the chamber of the appointed thickness of the described lamelliform element of correspondence.In another preferred embodiment, can obtain the stratiform magnetic element by this magnetic composite of extruding under heating state.In this case, obtain elongated (or continuous) stratiform magnetic element.In arbitrary embodiment, can cool off heated stratiform magnetic element as required.
Thereby in one embodiment, the manufacture method of antenna assembly of the present invention comprises:
(1) magnetic composite that comprises magnetic material and polymeric material by extruding becomes the step that lamelliform obtains extrusion element;
(2) sheet metal directly is bonded in step on the described extrusion element; Iridium
(3) the described sheet metal of etching has the step of the antenna distribution of given pattern with formation.
Fig. 2 illustrates the flow chart of aforesaid manufacture method of the present invention.In Fig. 2, the step that obtains magnetic composite is shown also.In this step, use suitable mixing/kneading device (for example Banbury mixer, twin-screw kneader or the like) mictomagnetism material and polymeric material, to obtain these materials by mixed uniformly compound.It is the stratiform magnetic element that this compound is formed (for example, extruding).
Preferably by sheet metal being placed on the stratiform magnetic element and using for example hot pressing to come hot pressing to realize the bonding of sheet metal and stratiform magnetic element.In this case, when sheet metal was adhered on the stratiform magnetic element of previous manufacturing, layered magnetic element was heated.At least the sheet metal surface of placing is heated to the softening temperature of polymeric material at least, and preferably is heated to its fusion temperature.As for the heating of stratiform magnetic element, it can be heated separately or is heated together with the sheet metal that is placed on it.When needing, also can the heating of metal thin slice.
When obtaining the stratiform magnetic element by extruding, the described sheet metal of hot pressing at once after obtaining the stratiform magnetic element by extruding, this moment, this stratiform magnetic element was still under higher temperature.Thereby, this sheet metal of hot pressing at once after extruding preferably.In this case, more preferably extruding and hot pressing are carried out as continuous process.In this case, stratiform magnetic element, particularly its surface can be heated as required.For this purpose, can use for example warm-up mill.
Preferably, the sheet metal that use has warty or block-like protrusions on it will contact the surface of stratiform magnetic element, and these projections guarantee with the stratiform magnetic element enough bonding strengths are arranged.For this sheet metal, preferably use such sheet metal: its surface have by the electro-deposition metal derby form irregularly shaped, and can be used as electrolytic metal thin slice (for example cathode copper thin slice) and can obtain from the market.In this case, preferably sheet metal is placed to and makes the surface of described injustice contact with the stratiform magnetic element.By using so irregular surface that has, the adhesion between sheet metal and stratiform magnetic element is reinforced by the anchoring effect of these pieces.
In the manufacture method according to antenna assembly of the present invention, when forming the antenna Wiring pattern when the bonding metal thin slice with by etching, sheet metal has enough areas and can form a plurality of antenna distributions.Like this, form a plurality of antenna distributions by etching.In this case, described a plurality of antenna distribution can be divided into each stratiform magnetic element with separate antenna distribution to obtain independent antenna assembly after etching.
As mentioned above, except the antenna distribution, antenna assembly of the present invention can have required electronic unit (for example, IC chip, electric capacity etc.), thereby and can have other distributions and with specific mode electronic unit and antenna distribution are coupled together.As required, form above-mentioned distribution in preferably during being etched with formation antenna distribution.
It should be noted that, preferably electronic unit is being installed later on again by etching formation antenna distribution and other required distributions.When forming a plurality of antenna distribution by etching, preferably before separating independent antenna assembly, finish installation.
In the foregoing description that the reference accompanying drawing is carried out, the antenna distribution appears on the surface of stratiform magnetic element.In other embodiment according to antenna assembly of the present invention, the antenna distribution appears on the both sides of stratiform magnetic element.As from the description of top manufacture method about antenna assembly see, can be by sheet metal being directly bonded to the both sides of stratiform magnetic element, this sheet metal of etching is made such antenna assembly then.
When sheet metal is adhered on the surface of stratiform magnetic element, preferably use hot pressing.When hot pressing, stratiform magnetic element and sheet metal all are heated, and they are cooled then.Because their thermal coefficient of expansion (particularly, thermal linear expansion coefficient) difference, thereby by hot pressing together the stratiform magnetic element and the compound of sheet metal comprise internal stress, even this owing to compound seem to seem the picture flat, thermal expansion coefficient difference also exists.When removing a part of sheet metal by the etching metal thin slice thereafter, above-mentioned internal stress reveals so that described compound shows warpage.
Yet, as mentioning among the top embodiment, when sheet metal is adhered to two of magnetic element when surperficial, because described sheet metal appears on the both sides of stratiform magnetic element, even so on thermal coefficient of expansion, there are differences, described internal stress is still potential substantially, thereby obtains better planarization.From this point, for antenna assembly according to the present invention, the antenna distribution optimizes on the both sides of present stratiform magnetic element.In this case, preferably the antenna distribution is formed it by stratiform magnetic element and toward each other.In other words, antenna distribution is preferably by the stratiform magnetic element and overlapping with another antenna distribution.For example, an antenna distribution is overlapping to small part and another antenna distribution, and preferably, an antenna distribution is substantially just in time overlapping with another antenna distribution.
It should be noted that, when the antenna distribution appears on the both sides of stratiform magnetic element, end at an antenna distribution forms the through hole that passes the stratiform magnetic element, and this through hole is filled with conducting element or at the inboard coating that forms of this through hole, conducts electricity to guarantee to form between two antenna distributions.
When two elements were same size, the antenna distribution appeared at and makes the absolute growth of antenna distribution be greater than the situation of antenna distribution when appearing on the side of stratiform magnetic element on the both sides of stratiform magnetic element.The size that this means antenna assembly can be littler.Because the absolute growth of antenna distribution becomes longer, so can be to the inductance/capacitance adjustment with bigger allowance, and the design of giving the antenna distribution is with bigger freedom, compare with the situation that the individual antenna distribution is formed on the side of stratiform magnetic element, how much restrictions in the formation of antenna distribution are become comparatively relax.
Example
The manufacturing of stratiform magnetic element
Use following magnetic material and polymeric material:
-magnetic material
(Hitachi Metal K.K makes Finemet (registered trade mark) FP-FT-5M, flat magnetic filler, average particle size particle size: 30-41 micron, apparent density: 0.5-0.7g/cm
3, tap density: 1.0-1.4g/cm
3)
-polymeric material
(haloflex is made real density: 1.11g/cm to Daisolac (registered trade mark) C-130 by Daiso Co.Ltd.
3)
With these magnetic materials and the polymeric material ratio shown in the table 1 below obtaining of on electronic scale, weighing, use the plastics spatula in same container, to mix 1 minute then to obtain mixed-powder.
Table 1
| Example 1 | Example 2 | |
| Magnetic material | 88.0% mass ratio | 80.0% mass ratio |
| Polymeric material | 12.0% mass ratio | 20.0% mass ratio |
Afterwards, the mixed-powder of 45cc is put into powder kneader (Toyo Seiki Seisakusho, Labo Plastomill makes: model 50C150, blade R60B) and under 100 ℃ design temperature, integrate 15 minutes, blade rotational speed is that per minute 60 changes (rpm) to obtain to integrate good one.
The group that the kneading that is obtained is good is formed into iron plate/special teflon sheet/thickness and adjusts partition (SUS as mentioned above, thickness is 0.5mm)+sandwich that group/special teflon sheet of rubbing up/iron plate is formed, and (Toho Press Seisakusho makes to use the hot pressing press machine, waterpower make-up machine: model T-1), under 15MPa, carry out 4 minutes real compacting afterwards pre-compaction forming under 100 ℃ the design temperature and under the setting pressure of 1MPa 3 minutes.Afterwards, (Toho Press Seisakusho makes to use cold press, waterpower make-up machine: model T-1), to be set in the boiler water circulation under 22 ℃ of temperature that obtain by cooler, carry out 4 minutes cold pressing under 1MPa, the magnetic piece (thickness 0.4-0.6mm) that obtains 12cm * 12cm thus is as the stratiform magnetic element.
Assessment to the magnetic characteristic of stratiform magnetic element
Specimen (15mm * 5mm) scales off from the stratiform magnetic element that obtains as mentioned above, device measuring magnetic permeability and saturation flux density below using:
Permeability measurement: ultra-high frequency wave band permeameter PMF-3000 (by Ryowa Electronics Co., Ltd. makes).
Saturation flux density is measured: vibrating specimen magnetometer (VSM) BHV-50H (RikenElectronics Co., Ltd. makes).Below table 2 magnetic permeability of specimen under the 14MHz bandwidth (unit: H/m) and saturation flux density (unit: G) is shown.
Table 2
| Example 1 | Example 2 | |
| Magnetic permeability (@14MHz) | 30.70 | 43.00 |
| Saturation flux density (G) | 2986 | 2674 |
Then, use the hot pressing pressure machine, the cathode copper thin slice (is made by Fukuda Metal Foil/PowderIndustry, CF-T8GD-STD-35,35 microns of thickness), the one side is roughened and by Ni-based compound treatment, on a surface of each magnetic piece of hot pressing in example 1 and 2.
As pressing conditions, (Toho Press Seisakusho makes with the hot pressing pressure machine, waterpower make-up machine: model T-1) under 120 ℃ and 4MPa, the sandwich of being adjusted partition (SUS, thickness are 0.5mm)+magnetic piece+cathode copper thin slice/special teflon sheet/silicon rubber/iron plate composition by iron plate/silicon rubber/special teflon sheet/thickness is carried out compacting in 4 minutes.It should be noted that the nodular surface of cathode copper thin slice (having the erose surface that is roughened) next-door neighbour magnetic piece is placed.
Afterwards, the use cold press (Toho Press Seisakusho makes, the waterpower make-up machine: model T-1), and to be set in the boiler water circulation under 22 ℃ of temperature that obtain by cooler, under 1MPa, carry out 4 minutes cold pressing, prepare the magnetic piece of 10cm * 10cm thus with copper foil.
For the aforesaid magnetic piece that obtains with copper foil, with foregoing in same way as measure specimen, comprise magnetic permeability and saturation flux density.Following table 3 illustrates the result of measurement.
Table 3
| Example 1 | Example 2 | |
| Magnetic permeability (@14MHz) | 36.80 | 51.30 |
| Saturation flux density (G) | 3495 | 3265 |
When comparison sheet 2 and table 3, can see that by the bonded copper thin slice, magnetic permeability and saturation flux density all are improved.
The magnetic piece with copper foil that each obtains is as mentioned above accepted etch processes, forms the described spiral antenna pattern of Fig. 1 to obtain antenna assembly of the present invention on this magnetic piece.Afterwards, use LCR meter (LCR meter) 4263A (making), and measuring probe is placed on the two ends of antenna and inductance L, measurement Q value under 10kHz by Hewlett-Packard.The result is shown in following table 4.
Table 4
| Example 1 | Example 2 | |
| L | 86.3H | 14.9H |
| Q | 8.7 | 4.9 |
From the measurement result of table 4, the antenna assembly with spiral antenna pattern of the present invention as can be seen demonstrates enough inductance L and Q value, thereby realizes the function as antenna assembly.
Commercial Application
The invention provides the antenna assembly that more easily to be made and for the manufacture of the method for described device.
Claims (17)
1. antenna assembly comprises:
(A) the stratiform magnetic element that forms by the magnetic composite that comprises magnetic material and polymeric material; And
(B) be arranged on antenna distribution in the surface of layered magnetic element at least one.
2. antenna assembly according to claim 1 is characterized in that, described antenna distribution is outstanding from the described surface of layered magnetic element.
3. antenna assembly according to claim 1 and 2, wherein said magnetic material are select from following group at least a, are made up of iron-silicon alloy, ferrite, Fe-Ni alloy, Sendust and amorphous alloy for described group.
4. according to each described antenna assembly among the claim 1-3, wherein said polymeric material is select from following polymer at least a, and described polymer comprises: polyethylene, polypropylene, haloflex, polyvinyl chloride, polyvinylidene fluoride, polystyrene, polyformaldehyde, ethylene vinyl acetate copolymer, ethylene-butyl acrylate copolymer, PETG, nylon, acrylonitrile-butadiene-styrene-terpolymer and polyphenylene sulfide.
5. according to each described antenna assembly among the claim 1-4, it is characterized in that: described antenna distribution is formed by the electrolytic metal thin slice, and the surface of the injustice of described electrolytic metal thin slice contacts with layered magnetic element.
6. according to each described antenna assembly among the claim 1-5, it is characterized in that: described antenna distribution is to be set on the surface of layered magnetic element by hot pressing.
7. according to each described antenna assembly among the claim 1-6, it is characterized in that: it is the polymeric material of 40-5% that described magnetic composite comprises magnetic material and the mass ratio that mass ratio is 60-95%.
8. according to each described antenna assembly among the claim 1-7, it is characterized in that: also comprise the IC chip that is connected to described antenna distribution.
9. method of making antenna assembly, described antenna assembly has stratiform magnetic element and antenna distribution disposed thereon, and described method comprises:
(1) obtains the step of layered magnetic element by the magnetic composite that comprises magnetic material and polymeric material;
(2) sheet metal directly is bonded in step in the surface of layered magnetic element at least one; And
(3) the described sheet metal of etching has the step of the antenna distribution of given pattern with formation.
10. the method for manufacturing antenna assembly according to claim 9 is characterized in that: by the described sheet metal of hot pressing at once, execution in step (1) and step (2) continuously after obtaining layered magnetic element with extruding.
11. the method according to claim 9 or 10 described manufacturing antenna assemblies is characterized in that: by on the material that described sheet metal is placed on described extruding then hot pressing finish described step (2).
12. the method according to each described manufacturing antenna assembly among the claim 9-11 is characterized in that: in described step (3), form a plurality of antenna distributions.
13. method according to each described manufacturing antenna assembly among the claim 9-12, it is characterized in that: by the IC chip is placed on the layered magnetic element and with specific mode each IC chip is electrically connected on each antenna distribution, the assigned I C chip that is associated with each antenna distribution is installed.
14. the method according to each described manufacturing antenna assembly among the claim 9-13 is characterized in that also comprising step: when forming a plurality of antenna distribution, after installing, be divided into the stand-alone antenna device that each has the individual antenna distribution.
15. an IC tag that is used for rfid system comprises according to each described antenna assembly among the claim 1-8.
16. a read/write device that is used for rfid system comprises according to each described antenna assembly among the claim 1-8.
17. a portable electric appts comprises according to each described antenna assembly among the claim 1-8.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006221037 | 2006-08-14 | ||
| JP221037/2006 | 2006-08-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101501930A true CN101501930A (en) | 2009-08-05 |
Family
ID=39082099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007800300292A Pending CN101501930A (en) | 2006-08-14 | 2007-08-10 | Antenna element and method for manufacturing same |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP2063489A4 (en) |
| JP (1) | JPWO2008020574A1 (en) |
| KR (1) | KR20090051096A (en) |
| CN (1) | CN101501930A (en) |
| TW (1) | TW200828679A (en) |
| WO (1) | WO2008020574A1 (en) |
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| CN102683805A (en) * | 2011-03-14 | 2012-09-19 | 深圳光启高等理工研究院 | Adjustable radio frequency antenna |
| CN103081101A (en) * | 2010-04-29 | 2013-05-01 | 斯马特拉克Ip有限公司 | Method for manufacturing an antenna component by etching |
| CN103947040A (en) * | 2011-09-14 | 2014-07-23 | 兰克森控股公司 | Rfid antenna |
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| JP2006041986A (en) * | 2004-07-28 | 2006-02-09 | Matsushita Electric Ind Co Ltd | Antenna |
| JP2006113750A (en) | 2004-10-13 | 2006-04-27 | Toppan Forms Co Ltd | Contactless data receiver and transmitter |
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- 2007-08-10 EP EP07792377A patent/EP2063489A4/en not_active Withdrawn
- 2007-08-10 JP JP2008529858A patent/JPWO2008020574A1/en active Pending
- 2007-08-10 WO PCT/JP2007/065732 patent/WO2008020574A1/en active Application Filing
- 2007-08-10 CN CNA2007800300292A patent/CN101501930A/en active Pending
- 2007-08-10 KR KR1020097005269A patent/KR20090051096A/en not_active Application Discontinuation
- 2007-08-13 TW TW096129861A patent/TW200828679A/en unknown
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| CN104364964A (en) * | 2012-05-16 | 2015-02-18 | Lg伊诺特有限公司 | Antenna for communication terminal and method of manufacturing the same |
| US9972898B2 (en) | 2013-09-12 | 2018-05-15 | Wistron Neweb Corp. | Antenna structure and method for manufacturing antenna |
| CN105576357A (en) * | 2014-10-11 | 2016-05-11 | 上海蓝沛新材料科技股份有限公司 | NFC antenna integrated on ferrite and preparation method thereof |
| CN107069185A (en) * | 2015-11-06 | 2017-08-18 | 联发科技股份有限公司 | Antenna for near-field communication |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2063489A1 (en) | 2009-05-27 |
| WO2008020574A1 (en) | 2008-02-21 |
| EP2063489A4 (en) | 2009-08-12 |
| JPWO2008020574A1 (en) | 2010-01-07 |
| KR20090051096A (en) | 2009-05-20 |
| TW200828679A (en) | 2008-07-01 |
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Application publication date: 20090805 |