CN206516765U - NFC antenna circuit for all-metal frame wrist-watch - Google Patents
NFC antenna circuit for all-metal frame wrist-watch Download PDFInfo
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- CN206516765U CN206516765U CN201621467313.9U CN201621467313U CN206516765U CN 206516765 U CN206516765 U CN 206516765U CN 201621467313 U CN201621467313 U CN 201621467313U CN 206516765 U CN206516765 U CN 206516765U
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- 239000002184 metal Substances 0.000 title claims abstract description 30
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 30
- 230000006698 induction Effects 0.000 claims abstract description 36
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 230000003321 amplification Effects 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 230000000191 radiation effect Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a kind of NFC antenna circuit for all-metal frame wrist-watch, including the all-metal NFC antenna body provided with distributing point, balun converter, the first amplifying circuit, the second amplifying circuit, match circuit and back-end circuit for handling aerial signal, induction coil is installed on the inside of all-metal NFC antenna body；The input of balun converter is connected with distributing point, first output end of balun converter is connected with the input of the first amplifying circuit, match circuit is connected between second output end of balun converter and the first terminals of induction coil, second terminals of induction coil are connected with the input of the second amplifying circuit, and the output end of the output end of the second amplifying circuit and the first amplifying circuit is connected with back-end circuit respectively.The utility model diode has unilateral conduction, ensure that leading in induction coil, electric current was maximum, the induction field of generation is most strong, so as to strengthen the radiation effect of the electromagnetic wave of all-metal NFC antenna body generation.
Description
Technical field
The utility model is related to a kind of NFC antenna circuit for all-metal frame wrist-watch.
Background technology
With the development and the improvement of people's living standards of science and technology, people are to the functional requirement of wrist-watch also more and more higher.Hand
Table early stage is mainly used in the time of checking, the ornament of body-worn is developed into later, now, and many intelligent watch are even with logical
Communication function.It is existing can communication intelligent wrist-watch be usually provided with antenna, still, due to the small volume of wrist-watch, the electricity that antenna is produced
The radiation effect of magnetic wave is poor, causes the communication effect of wrist-watch poor, therefore, it is necessary to provide a kind of new antenna circuit to solve
Above mentioned problem.
Utility model content
The purpose of this utility model is to provide a kind of being used for for radiation effect for the electromagnetic wave that can strengthen antenna generation
The NFC antenna circuit of all-metal frame wrist-watch.
To achieve these goals, the technical scheme that the utility model is used is as follows：
A kind of NFC antenna circuit for all-metal frame wrist-watch, includes the all-metal NFC antenna of the frame as wrist-watch
Body, the all-metal NFC antenna body is provided with the inside of distributing point, the all-metal NFC antenna body and is provided with sensing
Coil, the induction coil includes the first terminals and the second terminals；The NFC antenna circuit also include balun converter,
First amplifying circuit, the second amplifying circuit, match circuit and the back-end circuit for handling aerial signal；The balun converter
Including input, the first output end and the second output end, the input of the balun converter is connected with the distributing point, described
First output end of balun converter is connected with the input of first amplifying circuit, the second output of the balun converter
Be connected with the match circuit between end and the first terminals of the induction coil, the second terminals of the induction coil with
The input connection of second amplifying circuit, the output of the output end of second amplifying circuit and first amplifying circuit
End is connected with the back-end circuit respectively.
It is preferred that, the match circuit includes the first electric capacity, the second electric capacity and the first inductance, and first inductance includes the
One terminals and the second terminals, first electric capacity, institute are connected between the first terminals and ground wire of first inductance
State and second electric capacity be connected between the second terminals of the first inductance and ground wire, the first terminals of first inductance with
The second output end connection of the balun converter, the second terminals of first inductance connect with the first of the induction coil
Line end is connected.
It is preferred that, the induction coil is by a wires around 5-6 turn coils are formed, and the cross section of each turn coil is straight
Footpath is 0.2mm, is to be connected in series with two diodes, two in 0.1mm, each turn coil per the distance between two adjacent rings coil
Line between the center of individual diode passes through the center of the induction coil, when the induction coil is powered, and electric current is from every
The anode of one diode flows to the negative electrode of each diode.
It is preferred that, first amplifying circuit and the second amplifying circuit include the first amplifier, the second amplifier, the 3rd
Amplifier, the first to the 6th resistance and adjustable resistance, the input of the positive input formation amplifying circuit of first amplifier
End, is connected with first resistor, the first amplification between the negative input of first amplifier and the output end of the first amplifier
The adjustable resistance, the output end of the first amplifier are connected between the negative input of the negative input of device and the second amplifier
Second resistance, the negative-phase input and the 3rd amplifier of the 3rd amplifier are connected between the negative-phase input of the 3rd amplifier
Output end between be connected with 3rd resistor, the output end of the output end formation amplifying circuit of the 3rd amplifier, the second amplifier
Negative-phase input and the second amplifier output end between connection and the 4th resistance, the output end of the second amplifier puts with the 3rd
The 5th resistance is connected between the positive input of big device, the 6th is connected between the positive input and ground wire of the 3rd amplifier
Resistance.The induction coil is scribbling the copper that a layer thickness is 0.5mm on the positive surface of all-metal frame wrist-watch.
Compared with prior art, the utility model exists for the beneficial effect of the NFC antenna circuit of all-metal frame wrist-watch
In：Diode described in the utility model has unilateral conduction, ensure that in induction coil and leads to electric current maximum, generation
Induction field is most strong, so as to strengthen the radiation effect of the electromagnetic wave of all-metal NFC antenna body generation.
Brief description of the drawings
Fig. 1 is the circuit structure block diagram for the NFC antenna circuit that the utility model is used for all-metal frame wrist-watch；
Fig. 2 is the circuit theory diagrams of the first amplifying circuit described in the utility model or the second amplifying circuit；
Fig. 3 is the circuit theory diagrams of match circuit described in the utility model；
Fig. 4 is induction coil configuration schematic diagram described in the utility model.
Embodiment
The utility model is further described below with reference to specific embodiment.
Refer to shown in Fig. 1 to Fig. 4, the utility model provides a kind of NFC antenna circuit for all-metal frame wrist-watch,
All-metal NFC antenna body including the frame as wrist-watch, the all-metal NFC antenna body is provided with distributing point, described
Induction coil is installed, the induction coil includes the first terminals and the second terminals on the inside of all-metal NFC antenna body；
The NFC antenna circuit also includes balun converter, the first amplifying circuit, the second amplifying circuit, match circuit and for handling
The back-end circuit of aerial signal；The balun converter includes input, the first output end and the second output end, and the balun turns
The input of parallel operation is connected with the distributing point, and the first output end of the balun converter is defeated with first amplifying circuit
Enter end connection, described is connected between the second output end of the balun converter and the first terminals of the induction coil
With circuit, the second terminals of the induction coil are connected with the input of second amplifying circuit, the second amplification electricity
The output end on road and the output end of first amplifying circuit are connected with the back-end circuit respectively.
Wherein, the match circuit includes the first electric capacity C1, the second electric capacity C2 and the first inductance L, the first inductance L bags
The first terminals and the second terminals are included, first electricity is connected between the first terminals and ground wire of the first inductance L
Hold C1, the second electric capacity C2 is connected between the second terminals and ground wire of the first inductance L, the first inductance L's
First terminals are connected with the second output end of the balun converter, the second terminals and the sense of the first inductance L
The first terminals of coil are answered to connect.
In the utility model, the induction coil is surround by a wires and forms 5-6 turn coils, each turn coil
Cross-sectional diameter is 0.2mm, is to be connected in series with two in 0.1mm, each turn coil per the distance between two adjacent rings coil
Line between diode, the center of two diodes passes through the center of the induction coil, when the induction coil is powered,
Electric current flows to the negative electrode of each diode from the anode of each diode.
First amplifying circuit and the second amplifying circuit described in the utility model include the first amplifier A1, the second amplifier
A2, the 3rd amplifier A3, the first to the 6th resistance and adjustable resistance Rg, the positive input formation of the first amplifier A1 are put
The input of big circuit, is connected with the between the negative input of the first amplifier A1 and the first amplifier A1 output end
One resistance R1, the adjustable electric is connected between the first amplifier A1 negative input and the second amplifier A2 negative input
Rg is hindered, second resistance R2, the 3rd are connected between the first amplifier A1 output end and the 3rd amplifier A3 negative-phase input
3rd resistor R3 is connected between amplifier A3 negative-phase input and the 3rd amplifier A3 output end, the 3rd amplifier A3's
The output end of output end formation amplifying circuit, between the second amplifier A2 negative-phase input and the second amplifier A2 output end
Connection and the 4th resistance R4, the 5th is connected between the second amplifier A2 output end and the 3rd amplifier A3 positive input
The 6th resistance R6 is connected between resistance R5, the 3rd amplifier A3 positive input and ground wire.
In practical application, the interference in order to avoid induction coil to wrist-watch screen, the induction coil is close to described
A layer thickness is scribbled on the positive surface of all-metal frame wrist-watch and is 0.5mm copper, so that the water ripples for reducing wrist-watch screen show
As.The back-end circuit includes radio circuit, microprocessor and its peripheral circuit etc..
In summary, diode described in the utility model has unilateral conduction, ensure that leading in induction coil
Electric current is maximum, and the induction field of generation is most strong, so as to strengthen the radiation effect of the electromagnetic wave of all-metal NFC antenna body generation.
Schematically the utility model and embodiments thereof are described above, the description does not have restricted, accompanying drawing
Shown in be also one of embodiment of the present utility model, actual structure is not limited thereto.So, if this area
Those of ordinary skill enlightened by it, do not departing from the case that the utility model creates objective, designed without creative
The frame mode similar to the technical scheme and embodiment, all should belong to protection domain of the present utility model.
Claims (5)
1. a kind of NFC antenna circuit for all-metal frame wrist-watch, it is characterised in that the full gold including the frame as wrist-watch
Belong to NFC antenna body, the all-metal NFC antenna body is provided with distributing point, and the inner side of the all-metal NFC antenna body is pacified
Equipped with induction coil, the induction coil includes the first terminals and the second terminals；The NFC antenna circuit also includes balun
Converter, the first amplifying circuit, the second amplifying circuit, match circuit and the back-end circuit for handling aerial signal；The bar
Human relations converter includes input, the first output end and the second output end, input and the distributing point of the balun converter
Connection, the first output end of the balun converter is connected with the input of first amplifying circuit, the balun converter
The second output end and the induction coil the first terminals between be connected with the match circuit, the of the induction coil
Two terminals are connected with the input of second amplifying circuit, the output end of second amplifying circuit and first amplification
The output end of circuit is connected with the back-end circuit respectively.
2. it is used for the NFC antenna circuit of all-metal frame wrist-watch as claimed in claim 1, it is characterised in that the matching electricity
Road includes the first electric capacity, the second electric capacity and the first inductance, and first inductance includes the first terminals and the second terminals, described
First electric capacity, the second terminals and the ground of first inductance are connected between the first terminals and ground wire of first inductance
Second electric capacity, the second output end of the first terminals of first inductance and the balun converter are connected between line
Connection, the second terminals of first inductance are connected with the first terminals of the induction coil.
3. it is used for the NFC antenna circuit of all-metal frame wrist-watch as claimed in claim 2, it is characterised in that the line of induction
Circle is by a wires around 5-6 turn coils are formed, and the cross-sectional diameter of each turn coil is 0.2mm, per two adjacent rings coil
The distance between be 0.1mm, the line between two diodes, the center of two diodes is connected in series with each turn coil
By the center of the induction coil, when the induction coil is powered, electric current flows to each from the anode of each diode
The negative electrode of individual diode.
4. it is used for the NFC antenna circuit of all-metal frame wrist-watch as claimed in claim 3, it is characterised in that described first puts
Big circuit and the second amplifying circuit include the first amplifier, the second amplifier, the 3rd amplifier, the first to the 6th resistance and can
Resistance is adjusted, the input of the positive input formation amplifying circuit of first amplifier, the negative sense of first amplifier is defeated
Enter and be connected with first resistor, the negative input of the first amplifier and the second amplifier between end and the output end of the first amplifier
Negative input between connect the adjustable resistance, the negative-phase input of the output end of the first amplifier and the 3rd amplifier it
Between be connected with second resistance, be connected between the negative-phase input of the 3rd amplifier and the output end of the 3rd amplifier the 3rd electricity
Resistance, the output end of the output end formation amplifying circuit of the 3rd amplifier, the negative-phase input of the second amplifier and the second amplifier
Output end between connection with the 4th resistance, between the output end of the second amplifier and the positive input of the 3rd amplifier connect
There is the 5th resistance, the 6th resistance is connected between the positive input and ground wire of the 3rd amplifier.
5. it is used for the NFC antenna circuit of all-metal frame wrist-watch as claimed in claim 3, it is characterised in that the line of induction
Enclose and the copper that a layer thickness is 0.5mm is being scribbled on the positive surface of all-metal frame wrist-watch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621467313.9U CN206516765U (en) | 2016-12-29 | 2016-12-29 | NFC antenna circuit for all-metal frame wrist-watch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621467313.9U CN206516765U (en) | 2016-12-29 | 2016-12-29 | NFC antenna circuit for all-metal frame wrist-watch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206516765U true CN206516765U (en) | 2017-09-22 |
Family
ID=59863638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621467313.9U Withdrawn - After Issue CN206516765U (en) | 2016-12-29 | 2016-12-29 | NFC antenna circuit for all-metal frame wrist-watch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206516765U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069240A (en) * | 2016-12-29 | 2017-08-18 | 昆山睿翔讯通通信技术有限公司 | NFC antenna circuit for all-metal frame wrist-watch |
| CN112967429A (en) * | 2021-03-12 | 2021-06-15 | 青岛中瑞车联电子科技有限公司 | NFC lock control system and method |
-
2016
- 2016-12-29 CN CN201621467313.9U patent/CN206516765U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107069240A (en) * | 2016-12-29 | 2017-08-18 | 昆山睿翔讯通通信技术有限公司 | NFC antenna circuit for all-metal frame wrist-watch |
| CN107069240B (en) * | 2016-12-29 | 2024-03-19 | 昆山睿翔讯通通信技术有限公司 | NFC antenna circuit for all-metal frame watch |
| CN112967429A (en) * | 2021-03-12 | 2021-06-15 | 青岛中瑞车联电子科技有限公司 | NFC lock control system and method |
| CN112967429B (en) * | 2021-03-12 | 2022-08-12 | 青岛中瑞车联电子科技有限公司 | NFC lock control system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 215300 Room 009, No. 55, Shengchuang Road, Yushan Town, Kunshan, Suzhou, Jiangsu Province Patentee after: KUNSHAN RUIXIANG XUNTONG COMMUNICATION TECHNOLOGY Co.,Ltd. Country or region after: China Patentee after: KUNSHAN INNOVATION RESEARCH INSTITUTE OF XIDIAN University Address before: 215300 No.268 Dengyun Road, high tech Zone, Kunshan City, Suzhou City, Jiangsu Province Patentee before: KUNSHAN RUIXIANG XUNTONG COMMUNICATION TECHNOLOGY Co.,Ltd. Country or region before: China Patentee before: KUNSHAN INNOVATION RESEARCH INSTITUTE OF XIDIAN University |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170922 Effective date of abandoning: 20240319 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20170922 Effective date of abandoning: 20240319 |