CN202454370U - Composite soft magnetic core for near field communication (NFC) - Google Patents
Composite soft magnetic core for near field communication (NFC) Download PDFInfo
- Publication number
- CN202454370U CN202454370U CN2012200808429U CN201220080842U CN202454370U CN 202454370 U CN202454370 U CN 202454370U CN 2012200808429 U CN2012200808429 U CN 2012200808429U CN 201220080842 U CN201220080842 U CN 201220080842U CN 202454370 U CN202454370 U CN 202454370U
- Authority
- CN
- China
- Prior art keywords
- magnetic
- sheet
- magnetic core
- composite soft
- field communication
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 12
- 239000000463 material Substances 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 9
- 229910000859 α-Fe Inorganic materials 0.000 claims description 8
- 230000008054 signal transmission Effects 0.000 abstract description 3
- 239000011162 core material Substances 0.000 description 20
- 229910003962 NiZn Inorganic materials 0.000 description 7
- 239000006247 magnetic powder Substances 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- 229910005347 FeSi Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910002555 FeNi Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
Landscapes
- Soft Magnetic Materials (AREA)
Abstract
The utility model discloses a composite soft magnetic core for NFC. The composite soft magnetic core comprises a rectangular magnetic sheet A and a rectangular magnetic sheet B, wherein the magnetic sheet A and the magnetic sheet B are attached to an insulating tape alternately to form a sheet-shaped magnetic core. The composite soft magnetic core meets double requirements for broad bands and wide signal transmission distances of NFC magnetic cores.
Description
Technical field
The utility model relates to a kind of composite soft-magnetic magnetic core, and particularly a kind of near-field communication is used the composite soft-magnetic magnetic core.
Background technology
Along with fast development of information technology, the requirement that the NFC near-field communication is used also develops towards the direction of Kuan Pin ﹑ bandwidth signals transmission range.Traditional NFC near-field communication is used magnetic core, the single NiZn Ferrite Material that often uses, and the ferritic frequency of utilization of NiZn is higher, but Bs is lower, and the device that this material is made produces magnetic flux density little (signal transmission distance is short) when signal passes through.
Summary of the invention
The utility model technical problem to be solved provides a kind of near-field communication and uses the composite soft-magnetic magnetic core, has satisfied the double requirements of NFC near-field communication with the Kuan Pin ﹑ bandwidth signals transmission range of magnetic core.
The technical scheme that the utility model technical solution problem adopts is: a kind of near-field communication is used the composite soft-magnetic magnetic core, comprises rectangle magnetic sheet A and rectangle magnetic sheet B, and said magnetic sheet A and magnetic sheet B alternately bonded form the sheet magnetic core on insulating tape.
As a kind of preferred, said magnetic sheet A adopts Ferrite Material, and said magnetic sheet B adopts metal magnetic heartwood material.
The metal magnetic heartwood material that the utility model adopts can be in FeSiAl magnetic powder core, FeSi magnetic powder core, FeNiMo magnetic powder core, high magnetic flux FeNi magnetic powder core and the amorphous magnetic powder core any.
In the utility model, the combination of rectangle magnetic sheet A and rectangle magnetic sheet B can adopt the mode of epoxy resin or waterglass bonding to realize.
The material behavior of the General N iZn ferrite and the metal magnetic heart contrasts like following table:
| Material | The NiZn ferrite | The metal magnetic heart |
| Applying frequency scope (Hz) | >1M | 1k～1000k |
| Initial permeability μ i | 5～2500 | 10～500 |
| Saturation flux density Bs (mT) | 250～500 | 750～1600 |
| Curie temperature Tc (℃) | 120～450 | >300 |
| Power loss | High | Low |
The beneficial effect of the utility model is: the sheet magnetic core of the rectangle magnetic sheet A of employing NiZn Ferrite Material and the rectangle magnetic sheet B produced with combination of metal magnetic heartwood material; On the one hand since the ferritic frequency of utilization of NiZn apparently higher than the metal magnetic heart, thereby improved the frequency of utilization of device; On the other hand because the Bs of the metal magnetic heart (750～1600mT) apparently higher than the ferritic Bs of NiZn (≤500mT), thereby improved the signal transmission distance of device.NiZn ferrite and metal magnetic heartwood material are used in combination, learn from other's strong points to offset one's weaknesses, satisfied the double requirements of the Kuan Pin ﹑ bandwidth signals transmission range of the magnetic core that the NFC near-field communication uses.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Below in conjunction with accompanying drawing the utility model is further specified.
Embodiment
As shown in Figure 1; A kind of near-field communication is used the composite soft-magnetic magnetic core, comprises the rectangle magnetic sheet A1 of Ferrite Material and the rectangle magnetic sheet B2 of FeSi magnetic powder core material, with magnetic sheet A1 and magnetic sheet B2 alternately bonded on insulating tape 3; Adjacent magnetic sheet and the gap≤1mm between the magnetic sheet form the sheet magnetic core.This magnetic core has satisfied the double requirements of the Kuan Pin ﹑ bandwidth signals transmission range of the magnetic core that the NFC near-field communication uses.
Claims (2)
1. a near-field communication is used the composite soft-magnetic magnetic core, it is characterized in that: comprise rectangle magnetic sheet A (1) and rectangle magnetic sheet B (2), said magnetic sheet A (1) and magnetic sheet B (2) alternately bonded form the sheet magnetic core on insulating tape (3).
2. a kind of near-field communication as claimed in claim 1 is used the composite soft-magnetic magnetic core, it is characterized in that: said magnetic sheet A (1) adopts Ferrite Material, and said magnetic sheet B (2) adopts metal magnetic heartwood material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200808429U CN202454370U (en) | 2012-03-07 | 2012-03-07 | Composite soft magnetic core for near field communication (NFC) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200808429U CN202454370U (en) | 2012-03-07 | 2012-03-07 | Composite soft magnetic core for near field communication (NFC) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202454370U true CN202454370U (en) | 2012-09-26 |
Family
ID=46870212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200808429U Expired - Lifetime CN202454370U (en) | 2012-03-07 | 2012-03-07 | Composite soft magnetic core for near field communication (NFC) |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202454370U (en) |
-
2012
- 2012-03-07 CN CN2012200808429U patent/CN202454370U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120926 |
|
| CX01 | Expiry of patent term |