CN202551031U - NFC (near field communication) terminal capable of increasing NFC communication distance - Google Patents
NFC (near field communication) terminal capable of increasing NFC communication distance Download PDFInfo
- Publication number
- CN202551031U CN202551031U CN2012201131069U CN201220113106U CN202551031U CN 202551031 U CN202551031 U CN 202551031U CN 2012201131069 U CN2012201131069 U CN 2012201131069U CN 201220113106 U CN201220113106 U CN 201220113106U CN 202551031 U CN202551031 U CN 202551031U
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- nfc
- throw switch
- pole double
- chip
- duplexer
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Abstract
The utility model discloses an NFC (near field communication) terminal capable of increasing the NFC communication distance. The NFC terminal comprises an NFC chip, a duplexer, an NFC antenna, a simulated single-pole double-throw switch, a power amplifier and a baseband chip. A signal transmitting end of the NFC chip is connected with a moving contact of the simulated single-pole double-throw switch, a first fixed contact of the simulated single-pole double-throw switch is connected with a first signal end of the duplexer, and a second fixed contact of the simulated single-pole double-throw switch is connected with the first signal end of the duplexer through the power amplifier. A signal receiving end of the NFC chip is connected with a second signal end of the duplexer, a third signal end of the duplexer is connected with the NFC antenna, and a control end of the simulated single-pole double-throw switch and an enabling control end of the power amplifier are both connected with the baseband chip. The baseband chip is used for controlling on and off states of the simulated single-pole double-throw switch to correspondingly control on and off of the power amplifier, so that users can freely select proper NFC communication distance according to operating environments.
Description
Technical field
The utility model relates to the NFC communication technical field, particularly a kind of NFC terminal that increases the NFC communication distance.
Background technology
As shown in Figure 1, it is the structured flowchart at existing NFC terminal, and it comprises NFC chip 101, duplexer 102, NFC antenna 103 and baseband chip 104.First signal end 1 of the signal transmitting terminal 1 connection duplexer 102 of NFC chip 101 ', the secondary signal end 2 of the signal receiving end 2 connection duplexers 102 of NFC chip 101 ', the 3rd signal end 3 of duplexer 102 ' connection NFC antenna 103.The signal of NFC chip emission by duplexer 102 coupling feeding to NFC antenna 103; Launch through NFC antenna 103; The signal that NFC antenna 103 receives is transferred to the signal receiving end of NFC chip 101 through duplexer 102, by baseband chip this signal is handled.
At present, increasing being used in the mobile phone of NFC (near-field communication) function, the application of NFC mainly is divided into: snap gauge is intended (being that the NFC terminal is as being read equipment) and point-to-point (i.e. two NFC end point point to-point communications).In two kinds of application, the communication distance of NFC all has only about 5cm.This communication distance can't satisfy some special application requirements; Such as: when two mobile phones use the NFC function to intercourse business card; When perhaps two mobile phones use the NFC function to carry out Bluetooth pairing; Need with two mobile phones paste very near, otherwise can not realize above-mentioned functions, this has brought inconvenience for use of user.Therefore the communication distance that how to increase the NFC terminal has become the distance problem that solution is badly in need of in this area.
The utility model content
In view of the weak point of above-mentioned prior art, the purpose of the utility model is to provide a kind of NFC terminal of the NFC of increasing communication distance, to solve existing NFC terminal communication apart from short problem.
In order to achieve the above object, the utility model has been taked following technical scheme:
A kind of NFC terminal that increases the NFC communication distance; It comprises NFC chip, duplexer, NFC antenna, simulation single-pole double-throw switch (SPDT), be used for power amplifier that the signal with the emission of NFC chip amplifies and the conducting state that is used to control the simulation single-pole double-throw switch (SPDT), and the baseband chip that opens and closes according to the corresponding control power amplifiers of conducting state of simulation single-pole double-throw switch (SPDT);
The armature contact of the signal transmitting terminal connection mode endorsement double-pole double throw switch of said NFC chip, first fixed contact of said simulation single-pole double-throw switch (SPDT) connects first signal end of duplexer; Second fixed contact of simulation single-pole double-throw switch (SPDT) connects first signal end of duplexer through power amplifier;
The signal receiving end of said NFC chip connects the secondary signal end of duplexer, and the 3rd signal end of duplexer connects the NFC antenna;
The control end of said simulation single-pole double-throw switch (SPDT) connects a GPIO mouth of baseband chip, the 2nd GPIO mouth that enables control end connection baseband chip of power amplifier; The NFC chip is connected with baseband chip.
In the NFC terminal of above-mentioned increase NFC communication distance, also comprise RF receiving and transmission module and radio-frequency antenna, said radio-frequency antenna, RF receiving and transmission module, baseband chip connect successively.
In the NFC terminal of above-mentioned increase NFC communication distance, said power amplifier is the power amplifier of 5dbm for gain.
In the NFC terminal of above-mentioned increase NFC communication distance, said NFC terminal is a mobile phone.
Compared to prior art; The NFC terminal of the increase NFC communication distance that the utility model provides; Comprise power amplifier and baseband chip that NFC chip, duplexer, NFC antenna, simulation single-pole double-throw switch (SPDT), signal amplify; Through the conducting state of baseband chip control simulation single-pole double-throw switch (SPDT), and according to the corresponding control power amplifiers open and close of the conducting state of simulating single-pole double-throw switch (SPDT); Promptly when the armature contact of baseband chip control simulation single-pole double-throw switch (SPDT) connected first fixed contact, control power amplifiers was closed simultaneously, does not increase the NFC communication distance at NFC terminal this moment; When the armature contact of baseband chip control simulation single-pole double-throw switch (SPDT) connects second fixed contact; Control power amplifiers is opened simultaneously; This moment, power amplifier amplified the signal of NFC chip emission; Increase the NFC communication distance at NFC terminal, make the user freely to select the NFC communication distance that is fit to according to environment for use.
Description of drawings
Fig. 1 is the structured flowchart at existing NFC terminal.
Fig. 2 increases the structured flowchart at the NFC terminal of NFC communication distance for the utility model.
Embodiment
The utility model provides a kind of NFC terminal of the NFC of increasing communication distance, for purpose, technical scheme and the effect that makes the utility model is clearer, clear and definite, below develops simultaneously embodiment to the utility model further explain with reference to accompanying drawing.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
See also Fig. 2, it increases the structured flowchart at the NFC terminal of NFC communication distance for the utility model.As shown in the figure, the NFC terminal that the utility model provides comprises NFC chip 110, duplexer 120, NFC antenna 130, simulation single-pole double-throw switch (SPDT) 140, power amplifier 150 and baseband chip 160.
Wherein, said NFC chip 110 comprises signal transmitting terminal 1 and signal receiving end 2, is respectively applied for to transmit and receive signal.Said power amplifier 150 is used for the signal of NFC chip 110 emissions is amplified, and sends to duplexer 120.
Duplexer 120 is used for the signal that transmits and receives isolated; Guarantee reception and emission operate as normal simultaneously; It comprises three signal ends, is respectively: first signal end 1 ', secondary signal end 2 ' and the 3rd signal end 3 ', first signal end 1 ' be used to the receive signal of NFC chip 110 emissions; Secondary signal end 2 ' be used for the signal of NFC antenna 130 the is sent to signal receiving end 2 of NFC chip 110; The 3rd signal end 3 ' be used for receiving and transmitting signal, the signal that is about to NFC chip 110 sends to NFC antenna 130, and the signal that receives NFC antenna 130.
Baseband chip 160 is used to control the conducting state of simulation single-pole double-throw switch (SPDT) 140, and opens and closes according to the corresponding control power amplifiers 150 of conducting state of simulation single-pole double-throw switch (SPDT) 140.
Among the utility model embodiment; The armature contact a of the signal transmitting terminal 1 connection mode endorsement double-pole double throw switch 140 of NFC chip 110; The first fixed contact b of said simulation single-pole double-throw switch (SPDT) 140 connect first signal end 1 of duplexer 120 ', the second fixed contact c of simulation single-pole double-throw switch (SPDT) 140 through power amplifier 150 connect first signal end 1 of duplexers 120 '.In the present embodiment; From first signal end 1 of signal transmitting terminal 1 to the duplexer 120 of NFC chip 110 ' be the signal transmitting chain of NFC chip 110; And transmitting chain is become two-way through simulation single-pole double-throw switch (SPDT) 140; One tunnel process power amplifier 150 amplifies signal prolongs the NFC communication distance, and power amplifier 150 is only passed through on another road, and its communication distance is the proper communication distance.
The secondary signal end 2 of the signal receiving end 2 connection duplexers 120 of said NFC chip 110 ', the 3rd signal end 3 of duplexer 120 ' connection NFC antenna 130; NFC chip 110 is connected with baseband chip 160, controls the signal that NFC chips 110 transmit or handle 110 receptions of NFC chip by baseband chip 160.In the present embodiment, the secondary signal end 2 from the signal receiving end 2 of NFC chip 110 to duplexer 120 ' be the reception link of NFC chip 110, receive signal from NFC antenna 130.
The control end e of said simulation single-pole double-throw switch (SPDT) 140 connects a GPIO mouth GIPO1 of baseband chip 160; Send control signal by baseband chip 160; The conducting state of control simulation single-pole double-throw switch (SPDT) 140; The 2nd GPIO mouth GIPO2 that enables control end EN connection baseband chip 160 of power amplifier 150; When baseband chip 160 is simulated the conducting state of single-pole double-throw switch (SPDT) 140 in control, the open and close of corresponding control power amplifiers 150, its control principle will be described in detail at the back literary composition.
Among the utility model embodiment, the NFC terminal also comprises RF receiving and transmission module 170 and radio-frequency antenna 180, and said radio-frequency antenna 180, RF receiving and transmission module 170, baseband chip 160 connect successively, by the signal of baseband chip 160 processing RF receiving and transmission modules 170.
In the specific implementation, said NFC terminal is a mobile phone, and power amplifier 150 is the power amplifier 150 of 5dbm for gain, and the centre frequency of power amplifier 150 is 13.56MHz, and its operating frequency is 13.553MHz ~ 13.567MHz.These parameters are in the NFC standard, the operating frequency of NFC and work bandwidth.
Below be that mobile phone is an application implementation example with the NFC terminal, the operation principle of the utility model is elaborated:
The user in use; The conducting state of simulation single-pole double-throw switch (SPDT) 140 can be set through mobile phone menu; As in mobile phone menu, being provided with " increasing the NFC communication distance " and " not increasing the NFC communication distance " two options, when the user selected " increasing the NFC communication distance ", the armature contact a of baseband chip 160 control simulation single-pole double-throw switch (SPDT)s 140 was connected with the second fixed contact c; Control power amplifiers 150 is opened simultaneously; Power amplifier 150 is started working,, the NFC communication distance is increased because power amplifier 150 has the gain of 5dbm.In like manner; When the user selected " not increasing the NFC communication distance ", the armature contact a of baseband chip 160 control simulation single-pole double-throw switch (SPDT)s 140 was connected with the first fixed contact b, and control power amplifiers 150 is closed simultaneously; Power amplifier 150 is quit work; At this moment, owing to there is not access power amplifier 150, it is normal that the communication distance of NFC recovers.
In sum, the NFC terminal of the increase NFC communication distance that the utility model provides, through the conducting state of baseband chip control simulation single-pole double-throw switch (SPDT), and according to the corresponding control power amplifiers open and close of the conducting state of simulating single-pole double-throw switch (SPDT); Promptly when the armature contact of baseband chip control simulation single-pole double-throw switch (SPDT) connected first fixed contact, control power amplifiers was closed simultaneously, does not increase the NFC communication distance at NFC terminal this moment; When the armature contact of baseband chip control simulation single-pole double-throw switch (SPDT) connects second fixed contact; Control power amplifiers is opened simultaneously; This moment, power amplifier amplified the signal of NFC chip emission; Increase the NFC communication distance at NFC terminal, make the user freely to select the NFC communication distance that is fit to according to environment for use.
It is understandable that; Concerning those of ordinary skills; Can be equal to replacement or change according to the technical scheme and the utility model design thereof of the utility model, and all these changes or replacement all should belong to the protection range of the appended claim of the utility model.
Claims (4)
1. NFC terminal that increases the NFC communication distance; It is characterized in that; Comprise NFC chip, duplexer, NFC antenna, simulation single-pole double-throw switch (SPDT), be used for power amplifier that the signal with the emission of NFC chip amplifies and the conducting state that is used to control the simulation single-pole double-throw switch (SPDT), and the baseband chip that opens and closes according to the corresponding control power amplifiers of conducting state of simulation single-pole double-throw switch (SPDT);
The armature contact of the signal transmitting terminal connection mode endorsement double-pole double throw switch of said NFC chip, first fixed contact of said simulation single-pole double-throw switch (SPDT) connects first signal end of duplexer; Second fixed contact of simulation single-pole double-throw switch (SPDT) connects first signal end of duplexer through power amplifier;
The signal receiving end of said NFC chip connects the secondary signal end of duplexer, and the 3rd signal end of duplexer connects the NFC antenna;
The control end of said simulation single-pole double-throw switch (SPDT) connects a GPIO mouth of baseband chip, the 2nd GPIO mouth that enables control end connection baseband chip of power amplifier; The NFC chip is connected with baseband chip.
2. the NFC terminal of increase NFC communication distance according to claim 1 is characterized in that also comprise RF receiving and transmission module and radio-frequency antenna, said radio-frequency antenna, RF receiving and transmission module, baseband chip connect successively.
3. the NFC terminal of increase NFC communication distance according to claim 1 is characterized in that said power amplifier is the power amplifier of 5dbm for gain.
4. according to the NFC terminal of the described increase of claim 1 to 3 NFC communication distance, it is characterized in that said NFC terminal is a mobile phone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201131069U CN202551031U (en) | 2012-03-23 | 2012-03-23 | NFC (near field communication) terminal capable of increasing NFC communication distance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201131069U CN202551031U (en) | 2012-03-23 | 2012-03-23 | NFC (near field communication) terminal capable of increasing NFC communication distance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202551031U true CN202551031U (en) | 2012-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201131069U Expired - Fee Related CN202551031U (en) | 2012-03-23 | 2012-03-23 | NFC (near field communication) terminal capable of increasing NFC communication distance |
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| Country | Link |
|---|---|
| CN (1) | CN202551031U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111510534A (en) * | 2020-04-29 | 2020-08-07 | 维沃移动通信有限公司 | Electronic equipment |
| CN112803958A (en) * | 2021-04-09 | 2021-05-14 | 四川科道芯国智能技术股份有限公司 | NFC-SIM system, control method and mobile terminal |
| CN114202333A (en) * | 2020-09-17 | 2022-03-18 | Oppo广东移动通信有限公司 | Near field communication control method and device, electronic equipment and storage medium |
-
2012
- 2012-03-23 CN CN2012201131069U patent/CN202551031U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111510534A (en) * | 2020-04-29 | 2020-08-07 | 维沃移动通信有限公司 | Electronic equipment |
| CN114202333A (en) * | 2020-09-17 | 2022-03-18 | Oppo广东移动通信有限公司 | Near field communication control method and device, electronic equipment and storage medium |
| CN112803958A (en) * | 2021-04-09 | 2021-05-14 | 四川科道芯国智能技术股份有限公司 | NFC-SIM system, control method and mobile terminal |
| CN112803958B (en) * | 2021-04-09 | 2021-08-03 | 四川科道芯国智能技术股份有限公司 | NFC-SIM system, control method and mobile terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121121 Termination date: 20150323 |
|
| EXPY | Termination of patent right or utility model |