CN204044863U - A kind of active 13.56MHz RFID device - Google Patents
A kind of active 13.56MHz RFID device Download PDFInfo
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- CN204044863U CN204044863U CN201420484407.1U CN201420484407U CN204044863U CN 204044863 U CN204044863 U CN 204044863U CN 201420484407 U CN201420484407 U CN 201420484407U CN 204044863 U CN204044863 U CN 204044863U
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Abstract
The utility model discloses a kind of active 13.56MHz RFID device, comprise body (1), body (1) is provided with SE chip (2), interface and inside antenna (3), this device also comprises radio frequency front end chip (4), described interface comprises power interface (5), for the ISO/IEC7816 interface (6) that operates SE chip (2) and the SPI interface (7) carrying out register parameters setting for radio frequency front-end chip (4), described radio frequency front end chip (4) is coupled with reading and writing device antenna (9) by inside antenna (3) or exterior antenna (8), or radio frequency front end chip (4) is coupled with reading and writing device antenna (9) by the combined antenna of inside antenna (3) and exterior antenna (8).This device by the flexible switching of inside antenna and exterior antenna or can use jointly, makes the noncontact Performance optimization of device, greatly improves to use card demand under different application environment.
Description
Technical field
The utility model relates to 13.56MHz technology for radio frequency field, is specifically related to a kind of active 13.56MHz RFID device of miniaturization.
Background technology
Under the prior art, under the passive contactless ic of 13.56MHz (high frequency) RFID of small size is stuck in the prerequisite meeting complicated noncontact environment for use, area can not be infinitely small.But growing along with 13.56MHz RFID technique and market, there is the demand of contactless IC card miniaturization, such as be placed in wrist strap, but due to card limited area, there is the not good problem of noncontact performance in passive contactless IC card, be difficult to the request for utilization meeting product, so need to use active miniaturization contactless IC card to meet the demands.
The present active scheme of 13.56MHz RFID is mainly used in mobile payment field, as mobile phone payment card SIMPASS, or place radio frequency front end chip and antenna in traditional SIM card, it is placed in mobile phone, can realize noncontact to swipe the card, but its environment for use and size are also limited.The active 13.56MHz RFID device of a kind of miniaturization that the utility model proposes for this problem just.
Utility model content
For the defect existed in prior art, the purpose of this utility model is to provide a kind of active 13.56MHz RFID device, can be better met the application demand of contactless IC card by this device.
For achieving the above object, the technical solution adopted in the utility model is as follows:
A kind of active 13.56MHz RFID device, comprise body, body is provided with SE chip, interface and inside antenna, this device also comprises radio frequency front end chip, described interface comprises power interface, for the ISO/IEC7816 interface that operates SE chip and the SPI interface carrying out register parameters setting for radio frequency front-end chip, described radio frequency front end chip is coupled with reading and writing device antenna by inside antenna or exterior antenna, or radio frequency front end chip is coupled with reading and writing device antenna by the combined antenna of inside antenna and exterior antenna.
Further, a kind of active 13.56MHz RFID device as above, when radio frequency front end chip is connected with inside antenna, inside antenna is connected with the radio frequency I/O of radio frequency front end chip.
Further, a kind of active 13.56MHz RFID device as above, when radio frequency front end chip is connected with exterior antenna, exterior antenna is connected with the radio frequency I/O of radio frequency front end chip.
Further, a kind of active 13.56MHz RFID device as above, when radio frequency front end chip is connected with combined antenna, inside antenna is connected with the radio frequency I/O of radio frequency front end chip with after exterior antenna parallel connection.
Further, a kind of active 13.56MHz RFID device as above, when radio frequency front end chip is connected with combined antenna, inside antenna is connected with the radio frequency I/O of radio frequency front end chip with after exterior antenna series connection.
Further, a kind of active 13.56MHz RFID device as above, described power interface is connected with the power pins of SE chip and radio frequency front end chip respectively, or described power interface is only connected with the power pins of radio frequency front end chip.
Further, a kind of active 13.56MHz RFID device as above, body is circuit board.
Further again, a kind of active 13.56MHz RFID device as above, this device by pad solder on other circuit board.
Further, a kind of active 13.56MHz RFID device as above, is of a size of 8.4mm × 6mm after the encapsulation of this device.
The beneficial effects of the utility model are: active 13.56MHz RFID device of the present utility model, its built-in aerial, and when built-in aerial does not meet the demands, exterior antenna can be switched to, or can application of internal antennas and exterior antenna jointly, meet and use card demand under varying environment.This device can be applied on various wearable device, such as, in wrist-watch, wrist strap, also can be applied in other 13.56MHzRFID active systems, and ensure preferably noncontact performance.
Accompanying drawing explanation
Fig. 1 is the structural drawing of a kind of active 13.56MHz RFID device in the utility model embodiment;
Fig. 2 is the principle of work schematic diagram of a kind of active 13.56MHz RFID device in the utility model embodiment;
Fig. 3 is the connection diagram of radio frequency front end chip and inside antenna in the utility model embodiment;
Fig. 4 is the connection diagram of radio frequency front end chip and exterior antenna in the utility model embodiment;
Fig. 5 is the connection diagram of radio frequency front end chip and combined antenna in the utility model embodiment (inside antenna and exterior antenna in parallel);
Fig. 6 is the connection diagram of radio frequency front end chip and combined antenna (inside antenna and exterior antenna are connected) in the utility model embodiment.
Embodiment
Below in conjunction with Figure of description and embodiment, the utility model is described in further detail.
Fig. 1 shows the structural drawing of a kind of active 13.56MHz RFID device in the utility model embodiment, this device is mainly arranged on four parts of body 1, comprise SE chip 2, radio frequency front end chip 4 interface and inside antenna 3, wherein, interface comprises power interface 5, for the ISO/IEC7816 interface 6 that operates SE chip 2 and the SPI interface 7 carrying out register parameters setting for radio frequency front-end chip 4, described radio frequency front end chip 4 is coupled with reading and writing device antenna 9 by inside antenna 3 or exterior antenna 8, or radio frequency front end chip 4 is coupled with reading and writing device antenna 9 by the combined antenna of inside antenna 3 and exterior antenna 8.
Fig. 2 is the principle of work schematic diagram of a kind of active 13.56MHz RFID device in the utility model embodiment; wherein SE chip 2 (Secure Element chip) has write data and stores the ability of data; content in its storer can read for outside as required conditionally; or for internal information process and judgement; and resolve attack for preventing outside malice; protected data safety, has encryption/decryption algorithm in the chips.It responds to the data received, and sends response data to radio frequency front end chip.
After the signal of radio frequency front end chip 4 to the read write line 10 obtained by antenna-coupled carries out demodulation, and the signal after demodulation is sent to SE chip 2, or the response signal of radio frequency front end chip 4 to the SE chip 2 received sends to read write line 10 by antenna after modulating.
Power interface 5 in interface is for supplying the DC voltage of whole circuit working, in present embodiment, power interface 5 can be connected with the power pins of SE chip 2 and radio frequency front end chip 4 respectively, or be only connected with the power pins of radio frequency front end chip 4, that is, during device busy, external power source directly can power to respectively SE chip 2 and radio frequency front end chip 4 liang of chips by power interface 5, or, power interface 5 powers only to radio frequency front end chip 4, the output voltage of radio frequency front end chip 4 own is powered to SE chip 2, at this moment by SPI (Serial Peripheral Interface--Serial Peripheral Interface (SPI)) interface, the mode of radio frequency front end chip register parameters can be set to SE chip power supply, or control whether to carry out voltage output to SE chip by the mode connecting external control port (as MCU port) at radio frequency front end chip 4, or radio frequency front end chip 4 by the simulation noncontact passage with SE chip signal transmission to SE chip power supply.
Described ISO/IEC7816 interface 6 for operating SE chip 2, such as write sense data.
SPI interface 7 is for arranging the register parameters of radio frequency front end chip 4.
Inside antenna 3 is for the Space Coupling with external reader antenna 9, and data waveform is mutual.
Wherein, the body 1 described in present embodiment is circuit board, and this device can by pad solder (as pcb board) on other circuit board.RFID device of the present utility model can make enough little size, can adapt to more applied environments, and such as, size after this device encapsulation can make 8.4mm × 6mm.
RFID device in present embodiment is by inside antenna 3 or exterior antenna 8 or inside antenna 3 and the data interaction of the combined antenna of exterior antenna 8 be coupled realization and the read write line 10 of reading and writing device antenna 9, meet the noncontact Performance optimization under different environment for use demand conditions, specific as follows:
(1) inside antenna pattern
Inside antenna 3 when device inside meets needed for use, and when not needing to connect exterior antenna 8, when namely radio frequency front end chip 4 is directly connected with inside antenna 3, inside antenna 3 is connected with the radio frequency I/O of radio frequency front end chip 4.
As shown in Figure 3, in figure a pin and b pin represent radio frequency front end chip input export two ends (comprising peripheral circuit), c pin and d pin are the two ends of inside antenna 3 in device, a pin and d pin are linked together, b pin (Antenna2) and c pin (Antenna3) are linked together.
(2) exterior antenna pattern
When inside antenna 3 does not meet the demands, when needing to use exterior antenna 8, when namely radio frequency front end chip 4 is directly connected with exterior antenna 8, exterior antenna 8 is connected with the radio frequency I/O of radio frequency front end chip 4.
As shown in Figure 4, a pin is connected the two ends of exterior antenna 8 with b pin, by unsettled for two of inside antenna 3 pin c and d, does not carry out any connection.
(3) combined antenna pattern
When being used alone inside antenna 3 or exterior antenna 8 does not all meet the demands, when needing common use inner 3 and exterior antenna 8, two kinds of array modes are provided in present embodiment, one is that inside antenna 3 and exterior antenna 8 are in parallel, another kind is that inside antenna 3 and exterior antenna 8 are connected, and namely inside antenna is connected with radio frequency front end chip with after exterior antenna parallel connection or series connection.
(3.1) inside antenna 3 and exterior antenna 8 parallel connection
Now, one end of the radio frequency I/O of radio frequency front end chip 4 is all connected with one end of exterior antenna 8 with one end of inside antenna 3, and the other end of the radio frequency I/O of radio frequency front end chip 4 is all connected with the other end of exterior antenna 8 with the other end of inside antenna 3.
As shown in Figure 5, a pin is connected one end of exterior antenna 8 with c pin, b pin is connected the other end of exterior antenna 8 with d pin.
(3.2) inside antenna 3 and exterior antenna 8 are connected
Now, one end of the radio frequency I/O of radio frequency front end chip 4 is connected with one end of inside antenna 3, and the other end of the radio frequency I/O of radio frequency front end chip 4 is connected with the two ends of exterior antenna 8 respectively with the other end of inside antenna 3.
As shown in Figure 6, a pin is connected one end of exterior antenna 8, d pin is connected the other end of exterior antenna 8, b pin and c pin are linked together.
RFID device of the present utility model, independently application module can be formed by encapsulation, wherein, in process of production, the radio frequency I/O of radio frequency front end chip 4 and the two ends of inside antenna 3 are all in vacant state, when reality uses, then which kind of in above-mentioned several connected mode decision adopt as required, and connect according to above-mentioned connected mode according to selected mode.
Needs illustrate, radio frequency front end chip 4 in present embodiment comprises radio frequency chip itself and peripheral circuit thereof, in side circuit, radio frequency front end chip 4 is being connected with other parts by its peripheral circuit, for in present embodiment, when inside antenna 3 or exterior antenna 8 or combined antenna are connected with the input and output of radio frequency front end chip 4, be all be connected with the peripheral circuit of the radio frequency I/O of radio frequency front end chip 4.In addition, in present embodiment, above-mentioned pin a, b, c, d just schematically illustrate, pin a and b, and the connected mode between c and d can be exchanged.Above-mentioned inside antenna 3 and " inside " of exterior antenna 8 and " outside " is substantial meaning not, just whether is arranged on the inside of device and the explanation that increases to distinguish antenna.
Obviously, those skilled in the art can carry out various change and modification to the utility model and not depart from spirit and scope of the present utility model.Like this, if these amendments of the present utility model and modification belong within the scope of the utility model claim and equivalent technology thereof, then the utility model is also intended to comprise these change and modification.
Claims (9)
1. an active 13.56MHz RFID device, comprise body (1), body (1) is provided with SE chip (2), interface and inside antenna (3), it is characterized in that: this device also comprises radio frequency front end chip (4), described interface comprises power interface (5), for the ISO/IEC7816 interface (6) that operates SE chip (2) and the SPI interface (7) carrying out register parameters setting for radio frequency front-end chip (4), described radio frequency front end chip (4) is coupled with reading and writing device antenna (9) by inside antenna (3) or exterior antenna (8), or radio frequency front end chip (4) is coupled with reading and writing device antenna (9) by the combined antenna of inside antenna (3) and exterior antenna (8).
2. a kind of active 13.56MHz RFID device as claimed in claim 1, it is characterized in that: when radio frequency front end chip (4) is connected with inside antenna (3), inside antenna (3) is connected with the radio frequency I/O of radio frequency front end chip (4).
3. a kind of active 13.56MHz RFID device as claimed in claim 1, it is characterized in that: when radio frequency front end chip (4) is connected with exterior antenna (8), exterior antenna (8) is connected with the radio frequency I/O of radio frequency front end chip (4).
4. a kind of active 13.56MHz RFID device as claimed in claim 1, it is characterized in that: when radio frequency front end chip (4) is connected with combined antenna, be connected with the radio frequency I/O of radio frequency front end chip (4) after inside antenna (3) is in parallel with exterior antenna (8).
5. a kind of active 13.56MHz RFID device as claimed in claim 1, it is characterized in that: when radio frequency front end chip (4) is connected with combined antenna, inside antenna (3) is connected with the radio frequency I/O of radio frequency front end chip (4) with after exterior antenna (8) series connection.
6. the active 13.56MHz RFID device of the one as described in one of claim 1 to 5, it is characterized in that: described power interface (5) is connected with the power pins of SE chip (2) and radio frequency front end chip (4) respectively, or described power interface (5) is only connected with the power pins of radio frequency front end chip (4).
7. the active 13.56MHz RFID device of the one as described in one of claim 1 to 5, is characterized in that: body (1) is circuit board.
8. a kind of active 13.56MHz RFID device as claimed in claim 7, is characterized in that: this device by pad solder on other circuit board.
9. a kind of active 13.56MHz RFID device as claimed in claim 7, is characterized in that: be of a size of 8.4mm × 6mm after the encapsulation of this device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420484407.1U CN204044863U (en) | 2014-08-26 | 2014-08-26 | A kind of active 13.56MHz RFID device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420484407.1U CN204044863U (en) | 2014-08-26 | 2014-08-26 | A kind of active 13.56MHz RFID device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204044863U true CN204044863U (en) | 2014-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420484407.1U Active CN204044863U (en) | 2014-08-26 | 2014-08-26 | A kind of active 13.56MHz RFID device |
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| Country | Link |
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| CN (1) | CN204044863U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104217242A (en) * | 2014-08-26 | 2014-12-17 | 北京握奇数据***有限公司 | Active 13.56MHz RFID (Radio Frequency Identification Device) |
-
2014
- 2014-08-26 CN CN201420484407.1U patent/CN204044863U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104217242A (en) * | 2014-08-26 | 2014-12-17 | 北京握奇数据***有限公司 | Active 13.56MHz RFID (Radio Frequency Identification Device) |
| WO2016029665A1 (en) * | 2014-08-26 | 2016-03-03 | 北京握奇数据***有限公司 | Active 13.56mhz rfid device |
| GB2543465A (en) * | 2014-08-26 | 2017-04-19 | Beijing Watchdata Sys Co Ltd | Active 13.56MHZ RFID device |
| GB2543465B (en) * | 2014-08-26 | 2021-05-05 | Beijing Watchdata Sys Co Ltd | An active RFID device of 13.56MHz |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100102 Beijing city Chaoyang District Wangjing Lize Park No. 101 Qiming International Building 7 Patentee after: Beijing Watchdata Limited by Share Ltd Address before: 100102 Beijing city Chaoyang District Wangjing Lize Park No. 101 Qiming International Building 7 Patentee before: Beijing Woqi Data System Co., Ltd. |