CN201270037Y - Ultra-high frequency RFID card reader - Google Patents
Ultra-high frequency RFID card reader Download PDFInfo
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- CN201270037Y CN201270037Y CNU2008201342557U CN200820134255U CN201270037Y CN 201270037 Y CN201270037 Y CN 201270037Y CN U2008201342557 U CNU2008201342557 U CN U2008201342557U CN 200820134255 U CN200820134255 U CN 200820134255U CN 201270037 Y CN201270037 Y CN 201270037Y
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- card reader
- antenna
- reader
- card
- high frequency
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Abstract
The utility model relates non-contact information identification transmitting technology, in particular to a UHF RF identifying card-reader comprising a control unit and an RF transceiving unit. The control unit and the RF transceiving unit are both arranged on a circuit board I; and the RF transceiving unit is connected with an antenna by a cable. The card-reader adopts a transistor and a lumped component to replace the chip so as to realize the miniaturization and modularization of the card-reader and largely reduce the manufacturing cost of card-reader; therefore, the card-reader can be applied to the non-special fields and the common consumer has the ability to buy the card-reader and then read out the commodity information at home; the application is convenient and the application range of the card-reader is expanded. As the antenna is directly connected with the card-reader to realize the integration of the card-reader module and the antenna, the defect that the antenna is needed to be bought and arranged after the card-reader is bought is eliminated, and the use is more convenient and prompt.
Description
Technical field
The utility model relates to a kind of contactless information Recognition transmission technology, particularly relates to a kind of super high frequency radio frequency identification card reader.
Background technology
Radio-frequency (RF) identification (RFID, Radio Frequency Identification) technology is a kind of noncontact tag information Recognition transmission technology, rfid system generally is made up of card reader (or read write line), label and antenna, it is to utilize wireless radio frequency mode to carry out the noncontact bidirectional data communication, to reach the purpose of Target Recognition and swap data.Difference according to working frequency range, rfid system can also be divided into low frequency (LF), high frequency (HF), ultrahigh frequency (UHF) three classes, because super high frequency technique (UHF) has advantages such as operating distance is far away, communication speed is fast, cost is low, size is little, become the emphasis of current rfid system development.
At present, the uhf band RFID card reader product on the market mainly is divided into two kinds: first kind is desk-top card reader, and second kind is integrated single-chip card reader.Desk-top card reader volume is big, and the price height is mainly used in the far Distance RFID system, and range of application is narrow; The price comparison of integrated single-chip card reader is expensive, is mainly used on the handheld device, and range of application is narrow.
Application number is that 200610049668.0 Chinese invention patent discloses a kind of superhigh frequency rediofrequency identical label reader, it uses quadrature non-coherent demodulation technology to receive and detects the data message (amplitude modulation or phase modulation) that RFID tag back scattering electromagnetic wave carries, both save complicated receiver local oscillator phase locking circuit, also realized higher receiver sensitivity and Card Reader distance far away.Though it has guaranteed the safe, stable and reliable of reader work, but because the functional module of this read write line needs many peripheral circuit supports and adopts chip design, so complex structure, the cost of manufacture costliness, make most consumers be difficult to bear, limited the range of application and the upgrading of card reader greatly.
The utility model content
The purpose of this utility model is exactly in order to solve weak point of the prior art, and a kind of super high frequency radio frequency identification card reader is provided, and has not only realized miniaturization, modularization, and greatly reduce the cost of card reader under the prerequisite that guarantees job stability.
For realizing the utility model purpose, the utility model provides a kind of super high frequency radio frequency recognition read-write machine, comprises control module and Transmit Receive Unit, and control module and Transmit Receive Unit all are located on the circuit board 1, and Transmit Receive Unit is connected by cable 3 with antenna.
Described Transmit Receive Unit comprises oscillator, power amplifier, directional coupler, automatic gain amplifier, frequency mixer and the low-frequency amplifier that is integrated on the circuit board 1, the signal output part of described oscillator is connected with the signal output part of power amplifier and an input end of frequency mixer respectively, directional coupler is connected with the signal output part of power amplifier and the signal input part of automatic gain amplifier respectively, the signal output part of automatic gain amplifier is connected with another input end of frequency mixer, and the signal output part of frequency mixer is connected with low-frequency amplifier.
Transistor in the described oscillator adopts germanium silicon transistor, the resonator employing sound table resonator in the oscillator.
Transistor in the described power amplifier adopts three grades of transistors.
Transistor in the described automatic gain amplifier adopts dual gate FET.
Transistor in the described frequency mixer adopts dual gate FET.
Preferred version of the present invention is:
Antenna is installed in circuit board I goes up or be installed on the circuit board II that parallels with circuit board I, circuit board I is connected by screw with circuit board II.
Described antenna adopt dull and stereotyped inverted F antenna (Planar Inverted F Antenna, PIFA) or little loop antenna.
The beneficial effects of the utility model are:
1, the super high frequency radio frequency recognition read-write machine that provides of the utility model, adopt transistor and lamped element to substitute the use of chip, miniaturization, the modularization of card reader have been realized, greatly reduce the cost of card reader, make it no longer only be applicable to specific area, be in after general consumer have the ability to buy fully and read the information of commodity, easy to use, enlarged the range of application of card reader.
2, the utility model directly is connected antenna with card reader, realizes the integral structure of card reader module and antenna, has saved and has bought the defective that also will buy and fix up an aerial wire after the card reader, uses convenient, quick.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Structural representation when Fig. 2 is the utility model application;
Fig. 3 is a principle of work synoptic diagram of the present utility model;
Fig. 4 is the circuit diagram of oscillator;
Fig. 5 is the circuit diagram of power amplifier;
Fig. 6 is the circuit diagram of automatic gain amplifier;
Fig. 7 is the circuit diagram of frequency mixer;
Fig. 8 is the circuit diagram of low-frequency amplifier.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is done explanation in further detail.
As shown in Figure 1 and Figure 2, the super high frequency radio frequency recognition read-write machine of present embodiment, comprise control module and Transmit Receive Unit, control module and Transmit Receive Unit all are integrated on the circuit board 1, antenna is integrated on the antenna circuit board 2, circuit board 1 is fixedlyed connected with antenna circuit board 2 by screw 4, and antenna is connected the transmission that has realized radiofrequency signal by cable 3 with Transmit Receive Unit.Antenna select for use dull and stereotyped inverted F antenna (PlanarInverted F Antenna, PIFA) or little loop antenna.
During use, circuit board 1 and circuit board 2 encapsulation realize that antenna is connected with the integral type of circuit board 1 in the enclosure.Circuit board 2 one sides of card reader are aimed at electronic tag, turn on the power switch, get final product the data message in the reading tag.
Transmit Receive Unit comprises sound table oscillator, power amplifier, directional coupler, automatic gain amplifier, frequency mixer and the low-frequency amplifier that is integrated on the circuit board 1; Control module is the single-chip microcomputer that is integrated on the circuit board 1.As shown in Figure 3, principle of work of the present utility model is: at first sound table oscillator sends the 915MHz local oscillated signal, and this signal is divided into two-way, and one the tunnel gives three grades of transistor amplifiers as transmitting, and one the tunnel gives frequency mixer as local oscillation signal.Transmit and amplify, with the biasing of the modulation signal oxide-semiconductor control transistors amplifying circuit that comes from single-chip microcomputer, obtain am signals in this way simultaneously through three grades of transistor amplifiers.This transmits and passes to antenna port by directional coupler, and promptly card reader will transmit and send to label; Antenna also will receive tag card and return next signal when transmitting, this label signal that receives is passed to automatic gain amplifier again by directional coupler, sound is shown local oscillation signal that oscillator sends and passed to frequency mixer together through the received signal that AGC amplifies, obtain baseband signal through after the demodulation of frequency mixer, with baseband signal three grades of amplifications of low-frequency amplifier, give single-chip microcomputer then and decode, promptly finished whole Signal Processing process.
As shown in Figure 4, sound table oscillator is formed the bikini oscillatory circuit by germanium silicon transistor harmony table resonator, send the 915MHz local oscillated signal, U1 and U2 are homemade commercially available, germanium silicon transistor that model is 2SC3356, germanium silicon transistor U1 is as oscillating tube, germanium silicon transistor U2 is as the buffering isolated amplifier, and sound table resonator U3 is used for fixing oscillation frequency.
As shown in Figure 5, power amplifier adopts three grades of transistors to amplify, and T1, T2, T3 are that NEC makes, model is the transistor of 2SC3357, and totally three grades, output power is 200Mw.
Directional coupler is used to control the flow direction that transmits with received signal, can only flow to antenna through transmitting of three grades of transistor amplifiers amplifications, and the signal that is received by antenna can only enter into automatic gain amplifier.
As shown in Figure 6, it is the dual gate FET of BF909 that automatic gain amplifier adopts Philip manufacturing, model, and VT is a gain-controlled voltage.Control the grid of U1 with the Single-chip Controlling signal, amplifying signal to receive on another grid of U1.
As shown in Figure 7, it is the dual gate FET of BF998R that frequency mixer adopts Philip manufacturing, model, to produce the local oscillator end LO of local oscillation signal and two grids that are added to dual gate FET respectively through the radio-frequency head RF of the received signal of amplifying by the bikini oscillatory circuit, obtain intermediate-freuqncy signal from drain electrode.
As shown in Figure 8, it is the phase inverter of SN74LVC3GU04 that low-frequency amplifier adopts TI production, model, builds one three grades reverse low-frequency amplifier circuit, realizes three grades of amplifications to baseband signal.
The volume of the double-gated transistor that the utility model adopted be in the prior art receiving chip 1/3, because the utility model has adopted germanium silicon transistor, three grades of transistors and double-gated transistor, its cost chip more of the prior art is compared, with low cost, volume reduces, transistor performance more of the prior art more, so card reader of the present utility model has really realized modularization, miniaturization, low price, high-performance.
Should be noted that at last: above embodiment is only in order to explanation the technical solution of the utility model but not it is limited; although the utility model is had been described in detail with reference to the foregoing description; those of ordinary skill in the field are to be understood that: still can make amendment or be equal to replacement embodiment of the present utility model; and do not break away from any modification of the utility model spirit and scope or be equal to replacement, all should be encompassed in the claim protection domain of the present utility model.
Claims (8)
1, a kind of super high frequency radio frequency identification card reader, it is characterized in that: described card reader comprises control module and Transmit Receive Unit, and control module and Transmit Receive Unit all are located on the circuit board (1), and Transmit Receive Unit is connected by cable (3) with antenna.
2, super high frequency radio frequency identification card reader according to claim 1, it is characterized in that: described Transmit Receive Unit comprises the oscillator that is integrated on the circuit board (1), power amplifier, directional coupler, automatic gain amplifier, frequency mixer and low-frequency amplifier, the signal output part of described oscillator is connected with the signal output part of power amplifier and an input end of frequency mixer respectively, directional coupler is connected with the signal output part of power amplifier and the signal input part of automatic gain amplifier respectively, the signal output part of automatic gain amplifier is connected with another input end of frequency mixer, and the signal output part of frequency mixer is connected with low-frequency amplifier.
3, super high frequency radio frequency identification card reader according to claim 2, it is characterized in that: the transistor in the described oscillator adopts germanium silicon transistor, the resonator employing sound table resonator in the oscillator.
4, super high frequency radio frequency identification card reader according to claim 2, it is characterized in that: the transistor in the described power amplifier adopts three grades of transistors.
5, super high frequency radio frequency identification card reader according to claim 2, it is characterized in that: the transistor in the described automatic gain amplifier adopts dual gate FET.
6, super high frequency radio frequency identification card reader according to claim 2, it is characterized in that: the transistor in the described frequency mixer adopts dual gate FET.
7, super high frequency radio frequency identification card reader according to claim 1, it is characterized in that: described antenna is integrated on the antenna circuit board (2), and circuit board (1) is connected by screw (4) with circuit board (2).
8, according to claim 1 or 7 described super high frequency radio frequency identification card reader, it is characterized in that: described antenna adopts dull and stereotyped inverted F antenna or little loop antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201342557U CN201270037Y (en) | 2008-09-23 | 2008-09-23 | Ultra-high frequency RFID card reader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201342557U CN201270037Y (en) | 2008-09-23 | 2008-09-23 | Ultra-high frequency RFID card reader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201270037Y true CN201270037Y (en) | 2009-07-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201342557U Expired - Lifetime CN201270037Y (en) | 2008-09-23 | 2008-09-23 | Ultra-high frequency RFID card reader |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201270037Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111815926A (en) * | 2020-05-14 | 2020-10-23 | 中国气象局气象探测中心 | System and method for meteorological data wireless transmission |
-
2008
- 2008-09-23 CN CNU2008201342557U patent/CN201270037Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111815926A (en) * | 2020-05-14 | 2020-10-23 | 中国气象局气象探测中心 | System and method for meteorological data wireless transmission |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: WANG ZHENG Free format text: FORMER OWNER: HUIZHOU EVERAY TECHNOLOGIES CO., LTD. Effective date: 20120525 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 516003 HUIZHOU, GUANGDONG PROVINCE TO: 100085 HAIDIAN, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120525 Address after: 100085, 2B-605, bright city, No. 1, Nongda South Road, Beijing, Haidian District Patentee after: Wang Zheng Address before: 1906, room 516003, DESAY building, 12 Yunshan West Road, Jiangbei, Guangdong, Huizhou Patentee before: Huizhou Everay Technologies Co.,Ltd. |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Huizhou Everay Technologies Co.,Ltd. Assignor: Wang Zheng Contract record no.: 2012990000577 Denomination of utility model: Ultra-high frequency RFID card reader Granted publication date: 20090708 License type: Exclusive License Record date: 20120807 |
|
| ASS | Succession or assignment of patent right |
Owner name: RUIXIN KELIAN (BEIJING) ELECTRONIC TECHNOLOGY CO., Free format text: FORMER OWNER: WANG ZHENG Effective date: 20140709 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140709 Address after: 100085, Beijing, Haidian District on the road No. 26, Zhongguancun venture building, room 317 Patentee after: Core technology (Beijing) Electronic Technology Co., Ltd. Address before: 100085, 2B-605, bright city, No. 1, Nongda South Road, Beijing, Haidian District Patentee before: Wang Zheng |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Huizhou Everay Technologies Co.,Ltd. Assignor: Wang Zheng Contract record no.: 2012990000577 Denomination of utility model: Ultra-high frequency RFID card reader Granted publication date: 20090708 License type: Exclusive License Record date: 20120807 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Guan Chao Inventor after: Ma Yan Inventor before: Guan Chao Inventor before: Ma Yan Inventor before: Wang Zheng |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: GUAN CHAO MA YAN WANG ZHENG TO: GUAN CHAO MA YAN |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090708 |