CN105048061B - A kind of near field communication antenna device - Google Patents
A kind of near field communication antenna device Download PDFInfo
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- CN105048061B CN105048061B CN201510442911.4A CN201510442911A CN105048061B CN 105048061 B CN105048061 B CN 105048061B CN 201510442911 A CN201510442911 A CN 201510442911A CN 105048061 B CN105048061 B CN 105048061B
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Abstract
The invention belongs to wireless communication field, is related to the antenna assembly used in a kind of short distance radio communication system.The antenna assembly is the antenna assembly formed in mobile electronic device, including：Coil-conductor, flexible base board, magnetic material and shell conductor layer.Coil-conductor is the ring-type or spiral coil using winding center portion as coil aperture portion, and the flexible base board depended on it is assemblied in magnetic flakes material surface.Shell conductor layer, which blocks coil-conductor, is divided into two regions：First area is non-shell conductor layer shield portions, the i.e. actual magnetic link coupling unit of antenna, and the coil sections conductor is designed using narrow linewidth or major part is designed using narrow linewidth, and uses two-conductor layer Parallel Design；Second area is shell conductor layer shield portions, and the region coil-conductor uses wide line design.The present invention has：Mobile device housing metallic portion structural intergrity is not destroyed, is occupied little space, high performance good effect.
Description
Technical field
The present invention relates to it is a kind of in the RFID system to be communicated by electromagnetic field signal and counterpart device, it is NFC system, short
The antenna assembly used in distance wireless communication system.
Background technology
In recent years, as RFID system and the continuous of NFC system are promoted the use of, especially NFC system is in financial field
Popularization and application.In order to be communicated between mobile electronic device or between mobile electronic device and basic card-reading apparatus, in each equipment
In, especially hand-held mobile electronic equipment is mounted with the communication antenna of NFC system.Existing RFID or NFC antenna are due to line
The reason for wide, mostly 3 to 4 circles, are designed, and are assemblied in mobile device enclosure.With being equipped with metal shell mobile electronic device
Appearance, the service life of mobile electronic device and the wearability of device housings greatly improved, provided the user preferably
Usage experience.But metal shell has shielding action, under making near field antenna reading/writing distance significantly as a kind of good conductor to electromagnetic wave
Drop.
Authorization Notice No. CN 102405556B patent, there is provided a kind of antenna assembly is covered by larger area conductor layer
In the case of, solve a kind of method of the conductor layer to communication blocking electromagnetic waves.The antenna structure uses and is being covered in antenna surface
Conductor layer perforate mode, magnetic circuit window is provided for communication electromagnetic field, and in conductor layer window and communication antenna overlay area
Gap is opened in addition, reduces influence of the vortex to communication electromagnetic field in conductor layer, to reach the effect for improving communication distance.
But there is problems with its solution provided：1. the conductor layer in antenna covering is needed to open in program structure
Hole, and need to carry out out gap in hole side, the integrality of conductor layer is so destroyed in structure, if mobile device is outside it
Shell structure design does not allow perforate to open gap to destroy its complete appearance or structural support properties, then the program greatly should by very
With limitation；2. in the program, electromagnetic field caused by antenna need to bypass conductor layer, electromagnetic field during around conductor layer,
Conductor layer will cause greater attenuation to electromagnetic field, and attenuation degree is related to the conductor layer length that it is bypassed, then the program is in antenna
Wider conductor layer is assemblied in, i.e., in the larger mobile device terminal of metal shell, its effect will be affected.
The content of the invention
Problem or deficiency be present for above-mentioned, the invention provides a kind of near field communication antenna device, the antenna assembly can
The metal structure of mobile electronic device casing is not destroyed, and occupies less space, realizes telecommunication.
The antenna assembly of the present invention is the antenna assembly formed in mobile electronic device, including：Coil-conductor, flexible base
Plate, magnetic material and shell conductor layer.
Coil-conductor, ring-type or spiral coil using winding center portion as coil aperture portion, the flexibility depended on it
Substrate is assemblied in magnetic material surface.
Flexible base board, supports the baseplate material of coil-conductor, and coil-conductor is formed on flexible base board.
Magnetic material, it is assemblied in side of the coil-conductor away from shell conductor layer.
Shell conductor layer, the conductor layer are the metal part of composition mobile electronic device casing and part structural support, or
The conductor layer is formed at shell inner surface or the outer surface of the electronic equipment of assembling object；The conductor layer is configured at than the coil
Conductor will be close to the side of the antenna of communication other side side.
When overlooking the antenna assembly, shell conductor layer needs part covering coil-conductor, i.e. shell conductor layer is by coil
Conductor, which blocks, is divided into two regions：First area is non-shell conductor layer shield portions, the i.e. actual magnetic link coupling unit of antenna,
The part is actual aerial radiation part, and the coil sections conductor is designed using narrow linewidth, and the coil sections conductor makes
With two-conductor layer Parallel Design, less ohmic loss is realized；Second area is shell conductor layer shield portions, the region coil
Conductor uses wide line design, ohmic loss caused by reduce magnetic material and shell conductor layer vortex.Second area line
The wide line bar of circle conductor is wider than the narrow linewidth width of first area coil-conductor, and narrow linewidth width for etc. line width or the line such as not
It is wide.
Coil-conductor is outwards drawn and formed by its end self-assembling formation or wire jumper form with contact outside electronics point.
Hole can be set in the shell conductor layer surface, and the hole is in the region of covering coil-conductor, and its edge is complete
It is whole to be not interrupted out gap.
The paralleling two beds conductive region of the first area also includes the transitional region of wide line portion and narrow line portion,
The transitional region may span across two parts region.
For the antenna assembly in the case of conductor layer determination, antenna assembly resonant frequency is higher than the center frequency using frequency range
Rate.
Due in first area coil-conductor use smaller line width, make antenna can be realized in smaller area multiturn around
System, the effect in enhancing magnetic field is realized, lift the communication effect of antenna.
The present invention central idea be：1st, the coil-conductor of the second area covered in shell conductor layer is because using the wide line bar
Design, considerably reduces the ohmic loss of spiral conductor in itself, and reduce the magnetic field in shell conductor layer overlay area
Density, while reduce the ohmic loss caused by magnetic loss and the covering of shell conductor layer caused by the magnetic material；2nd, first
The coil-conductor in region employs narrow line design, the design of 5 to 7 circles can be achieved in the confined space, and use two-conductor layer
Parallel Design, effectively using area and improve electromagnetic field intensity simultaneously, reduce the ohmic loss in the coil sections conductor.
In summary, the present invention has following technique effect：1. mobile device housing metallic portion structural integrity is not destroyed
Property, the design space of structural engineer can so be substantially improved, be moved easily the appearance design of equipment；2. only take up less sky
Between because shell conductor layer covering the not outside radiated electromagnetic wave of coil-conductor, and need not be very big space, can set
Count out the antenna structure compared with small area；3. realize metal shell equipment near-field communication distance with non-metal shell equipment near field to lead to
News are apart from comparable effect；4. novel antenna structure, making full use of the spatial character of antenna structure, formed high performance near
Field communication antenna.
Brief description of the drawings
Fig. 1 is the electronic equipment rearview in embodiment 1.
Fig. 2 is antenna assembly overlooking the structure diagram, wherein shell conductor layer 6 and coil-conductor 1 and magnetic in embodiment 1
Property material 2 carry out perspective processing, i.e., by shell conductor layer 6 it can be seen that coil-conductor 1 and magnetic material 2.
Fig. 3 be Fig. 2 antenna assemblies X-X ' diagrammatic cross-sections, its interlayer structure with embodiment 2 and embodiment 3
It is identical.
Fig. 4 be embodiment 2 in antenna assembly overlooking the structure diagram, wherein shell conductor layer 6 and coil-conductor 1 and
Magnetic material 2 carries out perspective processing, i.e., by shell conductor layer 6 it can be seen that coil-conductor 1 and magnetic material 2.
Fig. 5 is the electronic equipment rear structure figure in embodiment 3, wherein shell conductor layer 6 and coil-conductor 1 and magnetic
Material 2 carries out perspective processing, i.e., by shell conductor layer 6 it can be seen that coil-conductor 1 and magnetic material 2.
Reference：
The shell conductor layer of L3 ... electronic equipments and the spacing in intermediate layer, SA ... electronic equipment interlayer structure top edges,
1 ... coil-conductor, 2 ... magnetic materials, the non-shell conductor layer overlying portions of 3 ... coil-conductors, 4 ... coil-conductors are by shell conductor
Layer covering part, 5 ... intermediate layers, the interlayer structure of electronic equipment, predominantly conductor module composition, 6 ... shell conductor layers, i.e.,
Conductor part in electronic equipment casing, 7 ... camera of electronic equipment parts.
Embodiment
1~Fig. 5 of reference picture, illustrate the antenna assembly involved by specific embodiment.
Fig. 1 is the rearview for the mobile electronic device for including the antenna assembly involved by embodiment 1, such as mobile phone.Electricity
The back side of sub- equipment is directed towards the communication counterpart side i.e. one side of read write line side antenna.As shown in figure 1, mobile electronic device in Fig. 1
The conductor part of rear shell forms shell conductor layer 6, the composition such as aluminium machine-shaping of shell conductor layer 6 or such as metal plating shape
Into to protect electronic equipment.Shell conductor layer 6 occupies most of scope of whole electronic equipment casing.And because support
Structure or the reason such as attractive in appearance, are not easy to carry out perforate design wherein.
Fig. 3 is the profile that the structure presses that X-X ' in Fig. 2 is cut-off rule.Its interlayer structure is followed successively by shell conductor layer 6, line
Enclose conductor 1, magnetic material 2, intermediate layer 5.
As shown in figure 1, the intermediate layer 5 of electronic equipment, the midfoot support structure of electronic equipment, and its knot are included in this layer
Load module in structure, wherein load module include the modules such as electronic circuit board, battery, each communication and signal processing module, should
Part is no lack of each metallic conductor class component.Intermediate layer 5 is spliced by the conductor layer of large area, and is connected by various supporting constructions
Form.In the top edge SA positions of intermediate layer 5, the main communication antenna of electronic equipment is often equipped with, because main communication antenna needs
SA positions are assembled to, so intermediate layer 5 can not be completely covered in shell conductor layer 6, its spacing is represented by L3 in Fig. 1, L3 length
Degree is not more than 20mm.
As shown in figure 1, the top corner edge in centre 5, is the position for being mounted with camera, such as Fig. 1 mesopores 7.Due to so
Architectural characteristic, also result in shell conductor layer 6 without perforate wherein to place camera lens.
Brief description of the drawings has been described.Fig. 3 is integrally-built profile, from the point of view of Fig. 3 is combined with Fig. 2.Fig. 3 coil conductors
1, due to the presence of shell conductor layer 6, has been classified as two parts.Wherein region 4 is that the overlay area of shell conductor layer 6 is the
Two regions, region 3 are that the non-overlay area of shell conductor layer 6 is first area., should by region 4 is covered by shell conductor layer 6
Region can not send or receive electromagnetic wave to outside, and the electromagnetic wave inside region 4 is strapped in shell conductor layer 6 and intermediate layer completely
Among metal environment inside 5, so the coil-conductor line width of the antenna assembly in the region is needed by wide line design, to reduce
Ohmic loss.The coil-conductor line width of antenna assembly in region 4 should be between 0.8mm-1.5mm.Antenna assembly in region 3
Coil-conductor is the part for actually sending out or receiving electromagnetic wave, and the part will be designed using hachure thin space, and so may be used
At utmost to increase electromagnetic field transmitting-receiving ability, and the part uses two layers of conductor Parallel Design, in increase electromagnetic wave transmitting-receiving
While ability, the ohmic loss of the part is reduced.The coil-conductor line width 0.2mm-0.4mm of the part of region 3, line spacing
0.1mm-0.3mm, so ensure also to can be controlled in even if around width of the antenna assembly in 3 regions after 7 circles in coil-conductor
Between 2.1mm-4.9mm.
In figure 3, magnetic material 2 is magnetic flakes, and the magnetic flakes are ferrite ceramics thin slice or resin type alloyed powder
Body fills thin slice.Its magnetic conductivity real part >=130 of coil-conductor 1, magnetic conductivity imaginary part≤5 are completely covered in magnetic material thin slice 2.
Aerial coil conductor loop is regarded around the number of turn by actual concrete condition, and antenna assembly is around 5 circles, the width 3mm- of region 3
In the case of 4mm, length 30mm-40mm, shell conductor layer 6 and the inner conductor layer of intermediate layer 5 and magnetic flakes determine, 800 are can be achieved
~1200nH inductance value.
According to foregoing description, the preferable communication antenna device of effect can be produced.
Embodiment 1
Make the circle design of the line width single-conductor such as 40mm × 40mm areas, common 0.8mm antenna 4, bottom assembling magnetic material
Material, and coil-conductor surface covers without conductor layer, is denoted as ordinary antennas device；Make antenna assembly area be 40mm ×
40mm, the coil sections conductor line width 1.2mm of region 4, the part helix of region 3 is around conductor line width 0.3mm, overall 5 circles design, bottom
Magnetic material is assembled in portion, antenna assembly coil-conductor surface covering conductor layer, makes the partial width 4mm of region 3, is denoted as the present invention and sets
Count antenna assembly；It is the design of the circles of line width individual layer antenna 4 such as 40mm × 40mm common 0.8mm to make antenna assembly area, and bottom fills
Conductor layer is equally covered with magnetic material, and in antenna assembly, equally spills width 4mm, is denoted as conductor layer covering ordinary antennas
Device.Contrast the communication effect of each mode.
In terms of test comparison result, antenna assembly of the invention can reach no conductor layer covering ordinary antennas literacy
80%, realize preferable effect.But if being designed using ordinary antennas, it is also fitted with the equipment of large area conductor layer shell
Antenna assembly, its reading/writing distance will decline to a great extent, it is seen that the antenna assembly of invention can play stronger lifting effect.
Embodiment 2
Electronic equipment casing is still such as the structure at the electronic equipment rear portion in Fig. 1.L3 is longer in Fig. 1, can give this patent
3 parts reserve wider space in the antenna assembly of invention, and carrying out the line width such as not for the coil-conductor 1 in region 3 designs, can
To realize more preferable communication effect.
If L3 length is longer, for the antenna assembly interlayer structure of realization as described in antenna assembly in Fig. 3, antenna assembly is specific
Details is as shown in antenna assembly in Fig. 4, the part of region 3 in Fig. 4, partial width 6mm, and its coil-conductor carries out unequal width rank
Scalariform designs, and the line width ecto-entad of the coil conductor 1 of region 3 carries out equal difference design successively.It is final to realize as day in Fig. 4 is traditional thread binding
The structure put.
Such as the structure in Fig. 4, the design reduces the resistance of the coil conductor 1 of region in antenna assembly 3, reduce ohm
Loss, improve communication distance.
Embodiment 3
Electronic equipment casing rear structure is as shown in figure 5, the rear structure of the electronic equipment in comparison diagram 2, its difference
It is, perforate design has been carried out in shell conductor layer 6, its position of perforate 7 is selected at the center of antenna assembly coil conductor 1
Around vacant part, but its verge of opening does not form and interrupts gap.
The part of shell conductor layer 6, the center ring of the coil-conductor in antenna assembly carry out perforate around vacant part, opened
Kong Houwei antenna assemblies provide bigger electromagnetic wave and enter window, can further improve the communication distance of antenna assembly.
The interlayer structure of antenna assembly is as described in the antenna assembly in Fig. 3.
Claims (6)
1. a kind of near field communication antenna device, the antenna assembly is the antenna assembly formed in mobile electronic device, including：Line
Enclose conductor, flexible base board, magnetic material and shell conductor layer, it is characterised in that：
The coil-conductor, ring-type or spiral coil using winding center portion as coil aperture portion, the flexibility depended on it
Substrate is assemblied in magnetic material surface；
The flexible base board, supports the baseplate material of coil-conductor, and coil-conductor is formed on flexible base board；
The magnetic material, it is assemblied in side of the coil-conductor away from shell conductor layer；
The shell conductor layer, for the metal part of composition mobile electronic device casing and part structural support, the conductor layer shape
Shell inner surface or outer surface into the electronic equipment in assembling object, are configured at than the coil-conductor close to communication other side
The side of the antenna of side；
When overlooking the antenna assembly, shell conductor layer needs part covering coil-conductor, i.e. shell conductor layer is by coil-conductor
Block and be divided into two regions：First area is non-shell conductor layer shield portions, the i.e. actual magnetic link coupling unit of antenna, the portion
It is divided into actual aerial radiation part, the coil sections conductor is designed using narrow linewidth, and coil sections conductor use is double
Conductor layer Parallel Design, realize less ohmic loss；Second area is shell conductor layer shield portions, the region coil-conductor
Using wide line design, ohmic loss caused by reduce magnetic material and shell conductor layer vortex；Second area coil is led
The wide line bar of body is wider than the narrow linewidth width of first area coil-conductor；
Coil-conductor is outwards drawn and formed by its end self-assembling formation or wire jumper form with contact outside electronics point.
2. near field communication antenna device as claimed in claim 1, it is characterised in that：Hole can be set in the shell conductor layer surface
Hole, the hole is in the second area of covering coil-conductor, and its edge is completely not interrupted out gap.
3. near field communication antenna device as claimed in claim 1, it is characterised in that：The paralleling two beds conductor region of the first area
Domain also includes the transitional region of wide line portion and narrow line portion, and the transitional region may span across two parts region.
4. near field communication antenna device as claimed in claim 1, it is characterised in that：The narrow linewidth of the first area coil-conductor
Width for etc. line width or the line width such as not.
5. near field communication antenna device as claimed in claim 1, it is characterised in that：In the case of the determination of shell conductor layer, antenna
Device resonant frequency is higher than the centre frequency using frequency range.
A kind of 6. mobile electronic device, it is characterised in that：It is equipped with the near-field communication described in claim 1-5 any claims
Antenna assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510442911.4A CN105048061B (en) | 2015-07-27 | 2015-07-27 | A kind of near field communication antenna device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510442911.4A CN105048061B (en) | 2015-07-27 | 2015-07-27 | A kind of near field communication antenna device |
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| CN105048061A CN105048061A (en) | 2015-11-11 |
| CN105048061B true CN105048061B (en) | 2018-01-12 |
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| CN201510442911.4A Active CN105048061B (en) | 2015-07-27 | 2015-07-27 | A kind of near field communication antenna device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105576343B (en) * | 2016-01-25 | 2018-04-06 | 电子科技大学 | A kind of near field communication antenna device |
| KR101901715B1 (en) * | 2018-02-14 | 2018-09-27 | 삼성전기 주식회사 | Antenna module and electronic device having the same |
| CN110212285B (en) * | 2019-06-28 | 2021-11-02 | 上海天马微电子有限公司 | Near field communication antenna, manufacturing method thereof, display module and display system |
| CN110416731A (en) * | 2019-07-12 | 2019-11-05 | 禾邦电子(苏州)有限公司 | A kind of electronic equipment with miniaturization near-field communication aerial |
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|---|---|---|---|---|
| WO2011036962A1 (en) * | 2009-09-25 | 2011-03-31 | 株式会社村田製作所 | Antenna device and handheld terminal |
| CN102405556A (en) * | 2009-04-21 | 2012-04-04 | 株式会社村田制作所 | Antenna apparatus and resonant frequency setting method of same |
| CN103797642A (en) * | 2011-10-07 | 2014-05-14 | 株式会社村田制作所 | Antenna device and electronic device |
| CN103825099A (en) * | 2014-02-28 | 2014-05-28 | 电子科技大学 | Short distance wireless communication tag antenna |
| CN103843197A (en) * | 2011-11-09 | 2014-06-04 | 株式会社村田制作所 | Antenna device and electronic device |
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2015
- 2015-07-27 CN CN201510442911.4A patent/CN105048061B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102405556A (en) * | 2009-04-21 | 2012-04-04 | 株式会社村田制作所 | Antenna apparatus and resonant frequency setting method of same |
| WO2011036962A1 (en) * | 2009-09-25 | 2011-03-31 | 株式会社村田製作所 | Antenna device and handheld terminal |
| CN103797642A (en) * | 2011-10-07 | 2014-05-14 | 株式会社村田制作所 | Antenna device and electronic device |
| CN103843197A (en) * | 2011-11-09 | 2014-06-04 | 株式会社村田制作所 | Antenna device and electronic device |
| CN103825099A (en) * | 2014-02-28 | 2014-05-28 | 电子科技大学 | Short distance wireless communication tag antenna |
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