CN112736412A - Hybrid structure of wireless charging antenna and NFC antenna, and electronic device - Google Patents
Hybrid structure of wireless charging antenna and NFC antenna, and electronic device Download PDFInfo
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- CN112736412A CN112736412A CN202011573935.0A CN202011573935A CN112736412A CN 112736412 A CN112736412 A CN 112736412A CN 202011573935 A CN202011573935 A CN 202011573935A CN 112736412 A CN112736412 A CN 112736412A
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- 239000002184 metal Substances 0.000 claims abstract description 6
- 238000010586 diagram Methods 0.000 description 16
- 238000005516 engineering process Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 4
- 238000004891 communication Methods 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
- 230000005611 electricity Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
Abstract
The invention provides a hybrid structure of a wireless charging antenna and an NFC antenna and an electronic device, comprising: the NFC coil and the wireless charging coil, wherein, the NFC coil with the wireless charging coil has the overlap region on same wiring layer, and the NFC coil with the wireless charging coil is in walk the line in the overlap region and use different metal levels. The structure form is suitable for smaller electronic equipment, the occupied area of the wireless charging coil and the NFC coil can be effectively increased, and the NFC card reading distance and the charging efficiency are improved.
Description
Technical Field
The invention relates to the technical field of wireless charging and near field communication, in particular to a hybrid structure of a wireless charging antenna and an NFC antenna and an electronic device.
Background
The wireless charging technology is derived from wireless power transmission, can avoid the direct connection of the electric equipment and the charging equipment, has the characteristics of flexibility, safety, reliability and the like, overcomes the problems of instability of electric contact, limitation of movement of the electric equipment and the like, and becomes an important supplement of a wired power supply mode. The wireless charging technology mainly transmits electric energy in a non-contact mode by means of electromagnetic near field induction, magnetic field resonance, microwave energy transmission and the like. Currently, the Qi standard represented by electromagnetic near field induction is the current mainstream wireless charging technology, and power transmission is realized by generating current through mutual induction of coils at a transmitting end and a receiving end.
NFC (Near Field Communication) is a non-contact identification and interconnection technology, originating from RFID (Radio Frequency identification) technology, and is used to implement point-to-point Near Field Communication between various devices. The NFC technology is widely applied to the fields of wireless payment, data transmission, and the like, and in recent years, with the popularization of smart phone devices, NFC antennas are increasingly designed into wireless terminals.
Generally, the wireless charging antenna and the NFC antenna have the same structural form, such as a wire-wound antenna or a Flexible Printed Circuit (FPC) antenna, and a shielding layer is also required to block an electromagnetic field from penetrating through an antenna body, so as to avoid influencing electronic components, a circuit board or a battery on the back side to form an eddy current effect, thereby bringing potential risks and hazards. Therefore, the wireless charging antenna and the NFC antenna are often mixed together to serve as a receiving coil and share a shielding layer, so that the space is saved and the cost is reduced.
Existing hybrid implementations typically place the wireless charging antenna and the NFC antenna side-by-side or nested within a single plane. However, this design occupies a large area and is not suitable for smaller electronic devices. In addition, the wiring area of the hybrid antenna is limited, and the mismatching of the size of the wireless charging antenna and the NFC antenna with the transmitting-end antenna is caused due to the irregular shape.
Disclosure of Invention
In view of the defects in the prior art, an object of the present invention is to provide a hybrid structure of a wireless charging antenna and an NFC antenna, and an electronic device.
In a first aspect, the present invention provides a hybrid structure of a wireless charging antenna and an NFC antenna, including: the NFC coil and the wireless charging coil, wherein, the NFC coil with the wireless charging coil has the overlap region on same wiring layer, and the NFC coil with the wireless charging coil is in walk the line in the overlap region and use different metal levels.
Optionally, the wireless charging coil comprises: the NFC charging coil and the first wireless charging coil are located on a first wiring layer, and the second wireless charging coil is located on a second wiring layer.
Optionally, there are at least two overlapping areas for the NFC coil and the first wireless charging coil.
Optionally, after the first wireless charging coil extends to the outside of the overlapping area, the first wireless charging coil is electrically connected to the second wireless charging coil located on the second wiring layer through a via hole.
Optionally, a shielding layer is disposed between the first wiring layer and the second wiring layer.
Optionally, the closed shape of the wireless charging coil is rectangular.
Optionally, the closed shape of the wireless charging coil is a circular ring.
Optionally, the closed shape of the NFC coil is rectangular.
Optionally, the wireless charging coil and the NFC coil are each multi-turn coils.
In a second aspect, the invention provides an electronic device comprising a hybrid structure of a wireless charging antenna and an NFC antenna as defined in any one of the first aspects.
Compared with the prior art, the invention has the following beneficial effects:
according to the hybrid structure of the wireless charging antenna and the NFC antenna and the electronic equipment, the NFC coil and the wireless charging coil are arranged on the same wiring layer in an overlapped mode, so that the occupied area of the wireless charging coil and the occupied area of the NFC coil can be effectively increased, the hybrid structure is suitable for smaller electronic equipment, and the NFC card reading distance and the charging efficiency are improved.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a first schematic diagram illustrating a layout manner of a wireless charging antenna and an NFC antenna in the prior art;
fig. 2 is a schematic diagram of a layout manner of a wireless charging antenna and an NFC antenna in the prior art;
fig. 3 is a schematic diagram of a hybrid structure of a wireless charging antenna and an NFC antenna according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a first wiring layer according to a first embodiment of the invention;
fig. 5 is a schematic structural diagram of a second wiring layer in the first embodiment of the invention;
fig. 6 is a schematic diagram of a hybrid structure of a wireless charging antenna and an NFC antenna according to a second embodiment of the present invention;
fig. 7 is a schematic structural diagram of a first wiring layer according to a second embodiment of the present invention;
fig. 8 is a schematic structural diagram of a second wiring layer in the second embodiment of the present invention.
In the figure:
1-a first wireless charging coil;
2-an NFC coil;
3-a second wireless charging coil.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
The wireless charging technology and the NFC technology are applied to various mobile terminals more and more widely, and because the wireless charging antenna and the NFC antenna have the same structure, the wireless charging antenna and the NFC antenna are often mixed together to serve as a receiving coil and a common shielding layer during design, so that the manufacturing cost can be reduced while the equipment space is saved. Fig. 1 is a first schematic diagram illustrating a layout manner of a wireless charging antenna and an NFC antenna in the prior art; fig. 2 is a schematic diagram of a layout manner of a wireless charging antenna and an NFC antenna in the prior art. Referring to fig. 1, the wireless charging antenna and the NFC antenna are designed side by side, the upper end is an NFC coil, and the lower end is a wireless charging coil. Referring to fig. 2, the wireless charging antenna and the NFC antenna are designed in a nested manner, the external part is an NFC coil, and the internal part is a wireless charging coil.
The two main coil arrangements are not difficult to implement on a mobile phone or a notebook because the area is large enough. However, for some wearable devices or internet of things devices, the circuit board area of the wearable devices or the internet of things devices is very limited, and the devices are generally in a strip shape, so that the wireless charging antenna and the NFC antenna can only be arranged in an antenna layout similar to the strip shape or a track shape, and the size difference between the antenna and the transmitting end antenna is too large, so that the coupling coefficient between the transmitting and receiving end antennas is reduced, the system efficiency of wireless charging is affected, and the card reading distance of NFC is reduced.
To above-mentioned problem, the application provides a mixed structure of wireless antenna and NFC antenna that charges, can effectively expand the size of wireless antenna and the NFC antenna that charges, increases the matching degree of receiving terminal and transmitting terminal antenna, finally promotes wireless charging and NFC's electricity performance. The structure of the present application may include: NFC coil and wireless charging coil, wherein, NFC coil and wireless charging coil have the overlap region on same wiring layer, and NFC coil and wireless charging coil walk the line in the overlap region and use different metal levels.
Illustratively, a wireless charging coil includes: the NFC charging coil and the first wireless charging coil are located on a first wiring layer, and the second wireless charging coil is located on a second wiring layer. There are at least two overlapping regions for the NFC coil and the first wireless charging coil.
Illustratively, after the first wireless charging coil extends to the outer side of the overlapping area, the first wireless charging coil is electrically connected with the second wireless charging coil located on the second wiring layer through the via hole.
In this embodiment, two-layer about first wireless charging coil and the wireless charging coil of second pass through the via hole realization is walked the line and is connected in parallel, and in the overlap region with the NFC coil, the NFC coil is laid at first metal level by the individual layer. The first wireless charging coil avoids the NFC coil, and is arranged on the second metal layer, so that the two coils are staggered and do not interfere with each other.
Illustratively, a shielding layer is disposed between the first wiring layer and the second wiring layer.
In this embodiment, the closed shape of wireless charging coil is rectangle, or ring shape, and the closed shape of NFC coil is the rectangle.
It should be noted that the present embodiment does not limit the closed shape of the wireless charging coil and the NFC coil, and the wireless charging coil and the NFC coil may be a multi-turn coil.
This kind of structural style of this embodiment has effectively increased the area that wireless charging coil and NFC coil occupy. Generally, the area of the coil at the transmitting end corresponding to the electronic device is much larger than that of the coil at the receiving end, so that the area of the receiving coil can be effectively increased by the structural form, and the larger the coupling coefficient between the transmitting coil and the receiving coil is, the higher the charging efficiency is and the longer the card reading distance is.
The invention also provides electronic equipment which comprises the mixed structure of the wireless charging antenna and the NFC antenna.
The hybrid structure of the wireless charging antenna and the NFC antenna in the present invention is described in more detail with reference to specific embodiments.
Example one
Fig. 3 is a schematic diagram of a hybrid structure of a wireless charging antenna and an NFC antenna according to a first embodiment of the present invention, and fig. 4 is a schematic diagram of a first wiring layer according to a first embodiment of the present invention; fig. 5 is a schematic structural diagram of a second wiring layer in the first embodiment of the invention. Referring to fig. 3 to 5, the first wireless charging coil 1 and the NFC coil 2 are located on the first wiring layer, the closed shapes of the first wireless charging coil 1 and the NFC coil 2 are both rectangular, and there are two overlapping regions in the first wireless charging coil 1 and the NFC coil 2. Second wireless charging coil 3 is located the second wiring layer, wherein, first wireless charging coil 1 extends to the outside of the overlap area after, is connected with second wireless charging coil 3 electricity that is located the second wiring layer through the via hole (that is to say, first wireless charging coil 1 and second wireless charging coil 2 are walked the line at the overlap area sharing part).
Example two
Fig. 6 is a schematic diagram of a hybrid structure of a wireless charging antenna and an NFC antenna according to a second embodiment of the present invention, and fig. 7 is a schematic diagram of a structure of a first wiring layer according to the second embodiment of the present invention; fig. 8 is a schematic structural diagram of a second wiring layer in the second embodiment of the present invention. Referring to fig. 6 to 8, the first wireless charging coil 1 and the NFC coil 2 are located on the first wiring layer, the closed shapes of the first wireless charging coil 1 are both circular rings, the closed shapes of the NFC coil 2 are both rectangles, and there are four overlapping regions in the first wireless charging coil 1 and the NFC coil 2. Second wireless charging coil 3 is located the second wiring layer, wherein, first wireless charging coil 1 extends to the outside of the overlap area after, is connected with second wireless charging coil 3 electricity that is located the second wiring layer through the via hole (that is to say, first wireless charging coil 1 and second wireless charging coil 2 are walked the line at the overlap area sharing part).
Further, the performance of the wireless charging coil and the NFC coil of independent setting to mixed structure in this application is tested respectively, and the test result is as shown in Table 1.
TABLE 1
When tested independently, the efficiency of wireless charging was 65%. The charging efficiency with the hybrid structure of the present application is 64.5%, which is only reduced by 0.5%.
When the NFC coil is independently tested, the card reading distances of the four card reading modes of the NFC coil are respectively 20mm, 20mm, 22mm and 16 mm. By adopting the hybrid structure, the card reading distances of four card reading modes of the NFC coil are respectively 17mm, 17mm, 18mm and 12mm, and the descending amplitude is smaller in general.
If wiring is performed according to the structure form of fig. 1 or fig. 2, the wireless charging coil and the NFC coil can only occupy a very small area due to the limited area of the wireless charging coil and the NFC coil, the wireless charging coil cannot work basically due to the too small coupling coefficient between the transceiver coil and the NFC coil, and the card reading distance of the NFC coil is weakened to be less than 10 mm.
In summary, compared with independent wireless charging and NFC coils, the hybrid structure of the present application has negligible performance difference, but greatly saves the wiring area.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. A hybrid structure of a wireless charging antenna and an NFC antenna, comprising: the NFC coil and the wireless charging coil, wherein, the NFC coil with the wireless charging coil has the overlap region on same wiring layer, and the NFC coil with the wireless charging coil is in walk the line in the overlap region and use different metal levels.
2. The hybrid structure of a wireless charging antenna and an NFC antenna according to claim 1, wherein the wireless charging coil comprises: the NFC charging coil and the first wireless charging coil are located on a first wiring layer, and the second wireless charging coil is located on a second wiring layer.
3. The hybrid wireless charging antenna and NFC antenna structure of claim 2, wherein there are at least two overlapping regions of the NFC coil and the first wireless charging coil.
4. The hybrid structure of wireless charging antenna and NFC antenna according to claim 3, wherein the first wireless charging coil is electrically connected to the second wireless charging coil on a second wiring layer through a via hole after extending to the outside of the overlapping area.
5. The hybrid structure of a wireless charging antenna and an NFC antenna according to claim 1, wherein a shielding layer is disposed between the first wiring layer and the second wiring layer.
6. The hybrid structure of a wireless charging antenna and an NFC antenna according to any one of claims 1 to 5, wherein the closed shape of the wireless charging coil is rectangular.
7. The hybrid structure of a wireless charging antenna and an NFC antenna according to any one of claims 1 to 5, wherein the closed shape of the wireless charging coil is a circular ring.
8. The hybrid structure of a wireless charging antenna and an NFC antenna according to any of claims 1-5, wherein the closed shape of the NFC coil is rectangular.
9. The hybrid structure of wireless charging antenna and NFC antenna according to any one of claims 1 to 5, wherein the wireless charging coil and the NFC coil are each multi-turn coils.
10. An electronic device, characterized in that it comprises a hybrid structure of a wireless charging antenna and an NFC antenna according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011573935.0A CN112736412A (en) | 2020-12-25 | 2020-12-25 | Hybrid structure of wireless charging antenna and NFC antenna, and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011573935.0A CN112736412A (en) | 2020-12-25 | 2020-12-25 | Hybrid structure of wireless charging antenna and NFC antenna, and electronic device |
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| CN112736412A true CN112736412A (en) | 2021-04-30 |
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| CN202011573935.0A Pending CN112736412A (en) | 2020-12-25 | 2020-12-25 | Hybrid structure of wireless charging antenna and NFC antenna, and electronic device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113451758A (en) * | 2021-06-30 | 2021-09-28 | 安徽华米信息科技有限公司 | Electronic device and control method thereof |
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| CN208539110U (en) * | 2018-08-08 | 2019-02-22 | 无锡村田电子有限公司 | A kind of electronic equipment and its antenna assembly |
| CN208820061U (en) * | 2017-10-12 | 2019-05-03 | 株式会社村田制作所 | Antenna assembly and electronic equipment |
| CN209015853U (en) * | 2018-12-20 | 2019-06-21 | 深圳市创新奇通讯有限公司 | A kind of mobile phone wireless charge coil structure |
| WO2019151693A1 (en) * | 2018-02-02 | 2019-08-08 | 엘지이노텍(주) | Wireless charging receiver for improving antenna performance |
| CN111211407A (en) * | 2018-11-21 | 2020-05-29 | 法雷奥舒适驾驶助手公司 | Antenna assembly and wireless charging device including the same |
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2020
- 2020-12-25 CN CN202011573935.0A patent/CN112736412A/en active Pending
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|---|---|---|---|---|
| US20180159357A1 (en) * | 2012-02-17 | 2018-06-07 | Panasonic Intellectual Property Management Co., Ltd. | Electronic device including non-contact charging module and battery |
| CN103515698A (en) * | 2012-06-28 | 2014-01-15 | 比亚迪股份有限公司 | NFC (Near Field Communication) antenna and electronic equipment |
| CN103840533A (en) * | 2013-12-19 | 2014-06-04 | 苏州旲烔机电科技有限公司 | Vehicle wireless charge emission module |
| CN208820061U (en) * | 2017-10-12 | 2019-05-03 | 株式会社村田制作所 | Antenna assembly and electronic equipment |
| WO2019151693A1 (en) * | 2018-02-02 | 2019-08-08 | 엘지이노텍(주) | Wireless charging receiver for improving antenna performance |
| CN208539110U (en) * | 2018-08-08 | 2019-02-22 | 无锡村田电子有限公司 | A kind of electronic equipment and its antenna assembly |
| CN111211407A (en) * | 2018-11-21 | 2020-05-29 | 法雷奥舒适驾驶助手公司 | Antenna assembly and wireless charging device including the same |
| CN209015853U (en) * | 2018-12-20 | 2019-06-21 | 深圳市创新奇通讯有限公司 | A kind of mobile phone wireless charge coil structure |
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| CN113451758A (en) * | 2021-06-30 | 2021-09-28 | 安徽华米信息科技有限公司 | Electronic device and control method thereof |
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Application publication date: 20210430 |
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