CN106788616A - A kind of wireless charging and near field communication means suitable for mobile terminal - Google Patents
A kind of wireless charging and near field communication means suitable for mobile terminal Download PDFInfo
- Publication number
- CN106788616A CN106788616A CN201611202116.9A CN201611202116A CN106788616A CN 106788616 A CN106788616 A CN 106788616A CN 201611202116 A CN201611202116 A CN 201611202116A CN 106788616 A CN106788616 A CN 106788616A
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- wireless charging
- coil
- nfc coils
- nfc
- near field
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- 238000004891 communication Methods 0.000 title claims abstract description 38
- 230000001629 suppression Effects 0.000 claims abstract description 37
- 239000000758 substrate Substances 0.000 claims abstract description 28
- 229910000859 α-Fe Inorganic materials 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 10
- 238000012360 testing method Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- H02J7/025—
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/24—Inductive coupling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
A kind of wireless charging and near field communication means suitable for mobile terminal, including substrate (1), Wireless charging coil (2) and NFC coils (3), Wireless charging coil (2) and NFC coils (3) are respectively arranged on substrate (1), also include suppression coil (4), suppression coil (4) is placed on substrate (1) and between Wireless charging coil (2) and NFC coils (3), for suppressing the coupled resonance between Wireless charging coil (2) and NFC coils (3).Due to adding suppression coil (4) between Wireless charging coil (2) and NFC coils (3), wireless charging and NFC performances can be improved, reduce the coupled resonance between Wireless charging coil (2) and NFC coils (3), solve the incompatibility problem of wireless charging and NFC coils, and, compact conformation, area occupied is small.
Description
Technical field
The present invention relates to wireless charging and technical field of near field communication, and in particular to a kind of suitable for the wireless of mobile terminal
Charge and near field communication means.
Background technology
Wireless charging technology is derived from wireless power transmission, can avoid being directly connected to for electrical equipment and charging equipment, tool
The features such as having flexible, safe and reliable, overcome electrical contact unstability, electrical equipment movement limitation the problems such as, turn into
The important supplement of wired powering mode.Wireless charging technology is main to be passed by electromagnetic near field sensing, magnetic field resonance and microwave energy
The mode such as defeated, electric energy is transmitted by non-contacting mode.At present, the Qi standards for being sensed as representing with electromagnetic near field are current main-streams
Wireless charging technology, electric current is produced by the coil mutual induction of transmitting terminal and receiving terminal, so as to realize power transmission.
The full name of NFC be Near Field Communication, i.e. near-field communication, come from radio frequency identification (RFID,
Radio Frequency ldentify Detection) technology, be a kind of non contact angle measurement and interconnection technique, by Sony and
PHILIPS Co.'s joint development, for realizing point-to-point short-range communication between various equipment.NFC technique is widely applied
In fields such as wireless payment, data transfers, recently as the popularization of Smartphone device, NFC antenna is more and more set
In counting wireless terminal.
In wireless charging and NFC technique, the performance of coil has been largely fixed efficiency of transmission and distance.Currently set
In meter, for wireless charging and NFC function, two independent coils can be typically used, one is used for wireless charging, another use
Make NFC, independent coil design takes larger area, and the design of wireless terminal is to tend to light, thin, therefore demand wireless charging
It is electrically coupled the coil of NFC function.
In order to reduce the area of coil, usual way be by wireless charging together with NFC coil designs, place respectively
In inside and outside portion.For this kind of structure, because wireless charging and NFC coils are close to, can be produced near NFC communication frequency
Coupled resonance frequency, influences the communication performance of NFC, and the coupled resonance for producing can cause electromagnetic interference for other devices.
The content of the invention
In order to solve the coupled problem between Wireless charging coil and NFC coils, the application provides a kind of being applied to and moves
The wireless charging and near field communication means of terminal, including substrate, Wireless charging coil and NFC coils, Wireless charging coil and NFC
Coil is respectively arranged on the substrate, and also including suppression coil, suppression coil is placed on substrate and is located at Wireless charging coil
And NFC coils between, for suppressing the coupled resonance between Wireless charging coil and NFC coils.
In a kind of embodiment, Wireless charging coil and NFC coil helix formulas are arranged on substrate, Wireless charging coil with
Gap is provided between NFC coils, it is close-shaped that suppression coil is arranged to one around gap.
In a kind of embodiment, Wireless charging coil and NFC coils are arranged at the same side of substrate, the dorsal surface of the substrate
It is provided with ferrite dielectric-slab.
In a kind of embodiment, Wireless charging coil and NFC coils are double-decker, and upper and lower two-layer is respectively symmetrically and is arranged at base
The both sides of plate, the Wireless charging coil of the dorsal surface of substrate and NFC coils it is outer, be provided with ferrite dielectric-slab.
In a kind of embodiment, Wireless charging coil is placed in NFC coil outers.
In a kind of embodiment, Wireless charging coil is placed in NFC coil insides.
In a kind of embodiment, Wireless charging coil and NFC coils are round screw thread shape, and the close-shaped of suppression coil is
Circular rings.
In a kind of embodiment, Wireless charging coil and NFC coils are square spiral shape, and the close-shaped of suppression coil is
Q-RING.
In a kind of embodiment, suppression coil is at least single-turn circular coil.
In a kind of embodiment, Wireless charging coil and NFC coils are respectively multiturn coil.
According to the wireless charging and near field communication means of above-described embodiment, due to Wireless charging coil and NFC coils it
Between add suppression coil, can improve wireless charging and NFC performances, reduce the coupling between Wireless charging coil and NFC coils
Resonance, solves the incompatibility problem of wireless charging and NFC coils, and, compact conformation, area occupied is small.
Brief description of the drawings
Fig. 1 is the wireless charging of embodiment one and the structural representation of near field communication means；
Fig. 2 is the wireless charging of embodiment one and the side diagram of near field communication means；
Fig. 3 (a) is the test schematic diagram that existing wireless charging and near field communication means do not add suppression coil；
Fig. 3 (b) is the wireless charging and near field communication means test schematic diagram of embodiment one；
Fig. 4 is the wireless charging of embodiment two and the structural representation of near field communication means；
Fig. 5 is the wireless charging of embodiment two and the side diagram of near field communication means；
Fig. 6 (a) is the test schematic diagram that existing wireless charging and near field communication means do not add suppression coil；
Fig. 6 (b) is the wireless charging and near field communication means test schematic diagram of embodiment two.
Specific embodiment
The present invention is described in further detail below by specific embodiment combination accompanying drawing.
Embodiment one：
This example provide a kind of wireless charging and near field communication means suitable for mobile terminal, its structure chart as shown in figure 1,
The mobile terminal of this example can be the equipment that mobile phone, ipad etc. can carry out wireless charging and near-field communication.
The wireless charging and near field communication means of this example include substrate 1, Wireless charging coil 2 and NFC coils 3, due to nothing
Line charge coil 2 has coupled resonance with NFC coils 3 near place, and in order to suppress the coupled resonance, this example is in wireless charging electric wire
Suppression coil 4 is introduced between 2 and NFC of circle coils 3, according to Lenz's theorem, suppression coil 4 is induced by Wireless charging coil 2
Induced field, the magnetic direction that the induced field is produced with Wireless charging coil 2 in the vicinity of NFC coils 3 is conversely, weaken wireless
The magnetic field that charge coil 2 is produced, reaches the coupled resonance suppressed between Wireless charging coil 2 and NFC coils 3.Specifically, suppressing
Coil 4 can reduce interfering with each other between Wireless charging coil 2 and NFC coils 3, improve the performance of NFC coils 3, in addition, suppressing
Coil 4 can reduce the coupled resonance amplitude between Wireless charging coil 2 and NFC coils 3, prevent coupled resonance frequency to other devices
The interference of part.
Specifically, Wireless charging coil 2 and NFC coils 3 are screw type is arranged on substrate, Wireless charging coil 2 and NFC
Gap is provided between coil 3, it is close-shaped that suppression coil 4 is arranged to one around gap.Wherein, Wireless charging coil 2 and NFC lines
Circle 3 is arranged at the same side of substrate 1, and same Center so that Wireless charging coil 2 and the area of NFC coils 3 are shared, structure
Compact, e.g., Wireless charging coil 2 and NFC coils 3 are utilized respectively metallic vias and are connected to the bottom of substrate 1, then, by band line
It is connected at top pads.
In other embodiments, Wireless charging coil 2 and NFC coils 3 can be double-decker, and upper and lower two-layer is respectively symmetrically
Be arranged at the both sides of substrate 1, the Wireless charging coil 2 of the dorsal surface of substrate 1 and NFC coils 3 it is outer, be provided with ferrite medium
Plate 5.
The Wireless charging coil 2 of this example, NFC coils 3 and suppression coil 4 are located at the same plane of substrate 1 so that processing side
Face, further, this example is provided with ferrite dielectric-slab 5 in the dorsal surface of substrate 1, and ferrite dielectric-slab 5 is used for armoured magnetic field, improves
The performance of Wireless charging coil 2 and NFC coils 3, its side view is as shown in Figure 2.
The Wireless charging coil 2 of this example is placed in outside NFC coils 3, and Wireless charging coil 2 and NFC coils 3 are round screw thread
Shape, the close-shaped of suppression coil 4 is circular rings；The Wireless charging coil 2 and NFC coils 3 of this example are respectively multiturn coil,
Suppression coil 4 is at least single-turn circular coil, and the suppression coil 4 of this example is single-turn circular coil.In other embodiments, Wireless charging coil
2 and NFC coils 3 are square spiral shape, and the close-shaped of suppression coil 4 is Q-RING, and the number of turn is multiturn coil.
When suppression coil 4 is not introduced between Wireless charging coil 2 and NFC coils 3, the Smith circle diagrams of NFC coils 3
Shown in test result such as Fig. 3 (a), from Fig. 3 (a), because outside Wireless charging coil 2 is for internal NFC coils 3
Coupling, occurs resonance in 14.86MHz, and resonance circle is very big, and coupled resonance intensity is very strong, on 13.56MHz, quality because
Sub- Q is only 3.08, and self-inductance is 2.83uH.
And the wireless charging and near field communication means of the offer of this example, the Smith circle diagrams test result of its NFC coil 3 is such as
Fig. 3 (b) is shown, coupled resonance frequency shifts to 14.71MHz, and resonance circle diminishes, coupled resonance intensity very little,
On 13.56MHz, quality factor q brings up to 9.1, and self-inductance is reduced to 1.73uH.And Wireless charging coil 2 is adding suppression line
After circle 4, its quality factor q is reduced to 5.09 from 6.26, and self-inductance is reduced to 7.58uH from 8.28uH, it is seen that to wireless charging
The charge efficiency influence of coil 2 is smaller.But all in all, the coupled resonance between Wireless charging coil 2 and NFC coils 3 is obtained
Suppression has been arrived, the performance of NFC coils 3 has been improve.
By test result, the wireless charging and near field communication means of this example offer subtract because increased suppression coil 4
Small coupled resonance between Wireless charging coil 2 and NFC coils 3, solves Wireless charging coil 2 compatible with NFC coils 3
Problem.
Embodiment two：
Based on embodiment one, this example provides the wireless charging and near field communication means of another structure, with embodiment one
Unlike：The Wireless charging coil 2 of this example is placed in inside NFC coils 3, and Wireless charging coil 2 and NFC coils 3 are square spiral shell
Rotation shape, the close-shaped of suppression coil 4 is Q-RING, and suppression coil 4 is placed between Wireless charging coil 2 and NFC coils 3,
Preferably, Wireless charging coil 2 and NFC coils 3 are double-decker, and upper and lower two-layer is respectively symmetrically the both sides for being arranged at substrate 1, are led to
Cross metallic vias connection, and be drawn out at top pads, the Wireless charging coil 2 of the dorsal surface of substrate 1 and NFC coils 3 it is outer
Ferrite dielectric-slab 5 is then provided with, ferrite dielectric-slab 5 is used for armoured magnetic field, improves the performance of NFC coils 3.Its structure chart is as schemed
Shown in 4, side view is as shown in Figure 5.
The suppression coil 4 of this example suppresses the principle of the coupled resonance between Wireless charging coil 2 and NFC coils 3 and implements
Example one is identical, i.e.,：According to Lenz's theorem, suppression coil 4 induces induced field by Wireless charging coil 2, the induced field
The magnetic direction produced in the vicinity of NFC coils 3 with Wireless charging coil 2 is conversely, weaken the magnetic that Wireless charging coil 2 is produced
, reach the coupled resonance suppressed between Wireless charging coil 2 and NFC coils 3.
When suppression coil 4 is not introduced between Wireless charging coil 2 and NFC coils 3, the Smith circle diagrams of NFC coils 3
Shown in test result such as Fig. 6 (a), from Fig. 6 (a), because internal Wireless charging coil 2 is for outside NFC coils 3
Coupling, occurs resonance in 12.09MHz, and resonance circle is very big, shows that the intensity of coupled resonance is very strong, in NFC frequencies
On 13.56MHz, quality factor q is only 4.2, and self-inductance is 1.33uH.
And the wireless charging and near field communication means of the offer of this example, the Smith circle diagrams test result of its NFC coil 3 is such as
Shown in Fig. 6 (b), coupled resonance frequency shift (FS) to 12.07MHz, but resonance circle diminishes, coupled resonance intensity very little, and
On 13.56MHz, quality factor q brings up to 10.4, and self-inductance is reduced to 1.09uH.And Wireless charging coil 2 is adding suppression line
Circle 4 after, its Q value is reduced to 10.7 from 17.6, and self-inductance is reduced to 7.62uH from 9.05uH, pair and wireless charging
The charge efficiency influence of coil 2 is smaller, by the reduction of actual measurement only 2%~3%.But all in all, Wireless charging coil 2
And the coupled resonance between NFC coils 3 is suppressed, the Q of NFC coils has been worth to improve, and performance is substantially improved.
By test result, the wireless charging and near field communication means of this example offer subtract because increased suppression coil 4
Small coupled resonance between Wireless charging coil 2 and NFC coils 3, solves Wireless charging coil 2 compatible with NFC coils 3
Problem.
Use above specific case is illustrated to the present invention, is only intended to help and understands the present invention, is not used to limit
The system present invention.For those skilled in the art, according to thought of the invention, can also make some simple
Deduce, deform or replace.
Claims (10)
1. a kind of wireless charging and near field communication means suitable for mobile terminal, including substrate (1), Wireless charging coil (2)
With NFC coils (3), the Wireless charging coil (2) and NFC coils (3) be respectively arranged on the substrate (1), and its feature exists
In also including suppression coil (4), the suppression coil (4) is placed on the substrate (1) and positioned at the Wireless charging coil
(2) and NFC coils (3) between, for suppressing the coupled resonance between the Wireless charging coil (2) and NFC coils (3).
2. wireless charging as claimed in claim 1 and near field communication means, it is characterised in that the Wireless charging coil (2)
It is screw type with NFC coils (3) to be arranged on the substrate (1), the Wireless charging coil (2) and the NFC coils (3) it
Between be provided with gap, it is close-shaped that the suppression coil (4) is arranged to one around the gap.
3. wireless charging as claimed in claim 2 and near field communication means, it is characterised in that the Wireless charging coil (2)
With the same side that NFC coils (3) are arranged at the substrate (1), the dorsal surface of the substrate (1) is provided with ferrite dielectric-slab (5).
4. wireless charging as claimed in claim 2 and near field communication means, it is characterised in that the Wireless charging coil (2)
It is double-decker with NFC coils (3), upper and lower two-layer is respectively symmetrically the both sides for being arranged at the substrate (1), the substrate (1)
The Wireless charging coil (2) of dorsal surface and NFC coils (3) it is outer, be provided with ferrite dielectric-slab (5).
5. wireless charging as claimed in claim 2 and near field communication means, it is characterised in that the Wireless charging coil (2)
It is placed in the NFC coils (3) outside.
6. wireless charging as claimed in claim 2 and near field communication means, it is characterised in that the Wireless charging coil (2)
It is placed in the NFC coils (3) internal.
7. wireless charging as claimed in claim 2 and near field communication means, it is characterised in that the Wireless charging coil (2)
It is round screw thread shape with NFC coils (3), the close-shaped of suppression coil (4) is circular rings.
8. wireless charging as claimed in claim 2 and near field communication means, it is characterised in that the Wireless charging coil (2)
It is square spiral shape with NFC coils (3), the close-shaped of suppression coil (4) is Q-RING.
9. wireless charging as claimed in claim 2 and near field communication means, it is characterised in that the suppression coil (4) is at least
It is single-turn circular coil.
10. wireless charging as claimed in claim 2 and near field communication means, it is characterised in that the Wireless charging coil (2)
Multiturn coil is respectively with NFC coils (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611202116.9A CN106788616A (en) | 2016-12-22 | 2016-12-22 | A kind of wireless charging and near field communication means suitable for mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611202116.9A CN106788616A (en) | 2016-12-22 | 2016-12-22 | A kind of wireless charging and near field communication means suitable for mobile terminal |
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| CN106788616A true CN106788616A (en) | 2017-05-31 |
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| CN201611202116.9A Pending CN106788616A (en) | 2016-12-22 | 2016-12-22 | A kind of wireless charging and near field communication means suitable for mobile terminal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108847327A (en) * | 2018-06-12 | 2018-11-20 | 上海安费诺永亿通讯电子有限公司 | A kind of NFC and wireless charging electric wire coil structures and a kind of expansible NFC coil |
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| US20150116178A1 (en) * | 2012-03-13 | 2015-04-30 | Nanomag Co., Ltd. | Combined radio frequency identification (rfid) and wireless charging electromagnetic wave absorber, combined rfid and wireless charging wireless antenna including same, and method for manufacturing same |
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2016
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| CN202435145U (en) * | 2011-10-12 | 2012-09-12 | 台湾东电化股份有限公司 | Induction module shared by near field communication and wireless charging |
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| CN104040835A (en) * | 2012-01-09 | 2014-09-10 | K电力株式会社 | The Reciving Set For The Wireless Charging System |
| US20150116178A1 (en) * | 2012-03-13 | 2015-04-30 | Nanomag Co., Ltd. | Combined radio frequency identification (rfid) and wireless charging electromagnetic wave absorber, combined rfid and wireless charging wireless antenna including same, and method for manufacturing same |
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| CN108847327A (en) * | 2018-06-12 | 2018-11-20 | 上海安费诺永亿通讯电子有限公司 | A kind of NFC and wireless charging electric wire coil structures and a kind of expansible NFC coil |
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Application publication date: 20170531 |