CN201374070Y - Ultrahigh frequency RFID reader module - Google Patents
Ultrahigh frequency RFID reader module Download PDFInfo
- Publication number
- CN201374070Y CN201374070Y CN200820235425U CN200820235425U CN201374070Y CN 201374070 Y CN201374070 Y CN 201374070Y CN 200820235425 U CN200820235425 U CN 200820235425U CN 200820235425 U CN200820235425 U CN 200820235425U CN 201374070 Y CN201374070 Y CN 201374070Y
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- circuit
- rfid
- reader module
- radio frequency
- ultrahigh frequency
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Abstract
The utility model aims to provide an ultrahigh frequency RFID reader module and solve the technical problems of simplifying the structure and reducing the cost. The utility model adopts the following technical proposal that: the ultrahigh frequency RFID reader module comprises a microwave radio frequency circuit, a baseband processing circuit and a power supply circuit, wherein the microwave radio frequency circuit is formed by a transmitting circuit and a receiving circuit. Compared with the prior art, the utility model adopts an integrated circuit chip and a modular structure, and has small volume and low cost, the working frequency band is 860 to 960 MHz, the reading and writing functions accord with an electronic tag of ISO18000-6B/6C protocol, and the reading and writing distance is more than 1.2 meters, and the modules can be conveniently embedded into various products by external interface units.
Description
Technical field
The utility model relates to the read write line of a kind of radio frequency identification equipment, particularly a kind of radio frequency identification equipment.
Background technology
The effect of the reader/writer module of radio frequency discrimination RFID equipment is to electronic tag launched microwave energy, the work of excited electrons label, say the word simultaneously to electronic tag, electronic tag is obtained microwave energy back reflection signal, read write line carries out demodulation, amplification, decoding and decoding by the echoed signal that tag reflection is returned to be handled, reading of the fixed data of realization label stored and the data of data field also can be rewritten the data in the data field.In radio-frequency recognition system, the working frequency range of read write line is 860MHz～960MHz, can closely read and write the content in the electronic tag that satisfies the ISO18000-6B/6C agreement, and send the information of the electronic tag read and write to radio frequency identification (RFID) terminal.The read write line complex structure of prior art, cost are higher.
Summary of the invention
The purpose of this utility model provides a kind of ultrahigh frequency radio frequency identification (RFID) reader module, and the technical solution problem is simplified structure, reduces cost.
The utility model is by the following technical solutions: a kind of ultrahigh frequency radio frequency identification (RFID) reader module, and described ultrahigh frequency radio frequency identification (RFID) reader module comprises microwave radio circuit, baseband processing circuitry and feed circuit, the microwave radio circuit is made of radiating circuit and receiving circuit.
After the signal that the carrier wave combiner circuit of the utility model radiating circuit produces inputs to after buffering is amplified and equilibrates to imbalance converter, again through prime amplifier, power amplifier, radio frequency low-pass filter, directional coupler to antenna connector.
Carrier wave combiner circuit of the present utility model is by voltage controlled oscillator in the RFID chip and phase-locked loop circuit, and the outer coupling temperature compensating crystal oscillator of RFID chip constitutes.
RFID chip of the present utility model adopts AS3990.
The signal that the antenna of the utility model receiving circuit receives through the directivity coupling mechanism, equilibrate to imbalance converter, balanced mixing circuit, filtering circuit to digital shaping circuit.
Baseband processing circuitry of the present utility model adopts field programmable gate array, single-chip microcomputer.
The utility model field programmable gate array adopts APA150, and single-chip microcomputer adopts C8051F023.
Feed circuit of the present utility model provide 3.3V power supply for single-chip microcomputer, for field programmable gate array provides 3.3V and 2.5V power supply, for the RFID chip provides 5.3V power supply, for the lawnmower amplifier provides 3V power supply, for radio-frequency power amplifier provides 4.2V power supply.
The working frequency range of the utility model microwave radio circuit is 860MHz～960MHz.
The utility model compared with prior art, adopt integrated circuit (IC) chip, modular organization, volume is little, and cost is low, and working frequency range is 860MHz～960MHz, the read-write electronic tag that meets the ISO18000-6B/6C agreement, reading/writing distance is greater than 1.2 meters, and by the external interface unit, module can be embedded in the various product easily.
Description of drawings
Fig. 1 is the microwave radio modular circuit schematic diagram of the utility model embodiment.
Fig. 2 is encoding and decoding and the protocol treatment circuit block diagram of the utility model embodiment.
Fig. 3 is encoding and decoding and the protocol treatment circuit schematic diagram of the utility model embodiment.
Fig. 4 is feed circuit and the peripheral interface circuit schematic diagram of the utility model embodiment.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.Ultrahigh frequency radio frequency identification (RFID) reader module of the present utility model comprises microwave radio circuit, baseband processing circuitry and feed circuit.
The function of microwave radio part is: the emission radio-frequency carrier, activate label by the carrier wave microwave energy, and the data information transfer that will be modulated to carrier wave is given label; Receive the data message that label returns simultaneously.For the electronic tag that meets ISO 18000-6B agreement, microwave radio is partly finished modulating/demodulating, the shaping of data.For the electronic tag that meets ISO 18000-6C agreement, the AS3990 chip of microwave radio part is not only finished modulating/demodulating, the shaping of data, also can start the lower layer protocol processor of its chip internal, finishes the encoding and decoding of label data.The function of Base-Band Processing part is: data protocol is handled, is communicated by letter with PCT.
As shown in Figure 1, the microwave radio circuit is divided into radiating circuit and receiving circuit.Radiating circuit: voltage controlled oscillator and phase-locked loop circuit in the RFID chip U200AS3990, U200 mates temperature compensating crystal oscillator X200S5032 outward, and 20MHZ constitutes the carrier wave combiner circuit.Signal after carrier wave is synthetic amplifies through U200 chip internal buffering, exports to by the 32nd, 33 pin of U200 chip and equilibrates to imbalance converter W201.The input end of prime amplifier U202 (the 4th pin) connects the output terminal (the 1st pin) of W201.The input end of power amplifier U203 (the 6th pin) connects the output terminal (the 1st pin) of U202, constitutes the final stage power amplification circuit.The input end of radio frequency low-pass filter (W3) (the 1st pin) connects the output terminal (the 12nd pin) of U203.The input end of directional coupler W202 (the 1st pin) connects the output terminal (the 3rd pin) of W3, and the output terminal of directional coupler (the 2nd pin) connects antenna connector.The signal that the antenna of receiving circuit receives through directivity coupling mechanism W202, equilibrate to the receiving cable in the imbalance converter W200 to U200, receiving cable is balanced mixing circuit, filtering circuit and digital shaping circuit.The working frequency range of radio-frequency module is 860MHz～960MHz.
As shown in Figures 2 and 3, baseband processing circuitry is by on-site programmable gate array FPGA APA150, single-chip microprocessor MCU C8051F023, and peripheral circuit is formed jointly.The parallel port IO of AS3990 (0:7) is corresponding with single-chip microcomputer P1 mouth to link to each other, and wherein IO2, IO3, IO5, IO6, IRQ (the 40th pin) link to each other with the IO pin of FPGA as serial port.FPGA links to each other with the P3 mouth of single-chip microcomputer by the 3rd～9 and 18,19 these 8 mouth lines, like this, builds the passage of radio frequency part and baseband portion.
The data that meet ISO 18000-6C agreement after the AS3990 decoding, directly send single-chip microcomputer to handle by the P1 mouth.The data that meet ISO 18000-6B agreement after AS3990 finishes the demodulation shaping, are given FPGA decoding, after the FPGA decoding finishes, send into single-chip microcomputer by the P3 mouth.When outwards sending data, be an above-mentioned inverse process.
As shown in Figure 4, feed circuit are the power supply of MCU, FPGA, RFID chip, lawnmower amplifier and radio-frequency power amplifier.Wherein, the operating voltage of MCU is 3.3V, and the operating voltage of FPGA is 3.3V and 2.5V, and the different magnitude of voltage of this two-way is exported after by two-way voltage stabilizing chip U105 voltage stabilizing.The operating voltage of RFID chip is 5.3V, is provided by the external interface power supply, by 23,24, the 25 pin access of interface JP101.The operating voltage of radio-frequency power amplifier is 4.2V, is provided by the external interface power supply, by 18,19, the 20 pin access of interface JP101.The operating voltage of lawnmower amplifier is 3V, is provided by the output terminal of low-dropout regulator U205.
The reader/writer module course of work of the present utility model: energized, after opening the ultrahigh frequency radio frequency identification (RFID) reader module and enabling, the each several part circuit is started working, and the ultrahigh frequency radio frequency identification (RFID) reader module is carried out corresponding actions according to the instruction that PCT sends.Under the control of control terminal, when read-write ISO 18000-6C label, MCU starts carrier wave combiner circuit, encoding and decoding and the reception/radiating circuit in the RFID chip, open the feed circuit of lawnmower amplifier U205 simultaneously, and the Enable Pin (the 2nd pin) and the offset side (the 22nd pin) of radio-frequency power amplifier, entire circuit enters duty, and the data of encoding and decoding are interaction process between MCU and RFID chip.When read-write ISO 18000-6B label, the shaping filter of label data is finished by the internal circuit of RFID chip, and the encoding and decoding of label data, analysis are finished jointly by FPGA and MCU.
Claims (9)
1. ultrahigh frequency radio frequency identification (RFID) reader module, it is characterized in that: described ultrahigh frequency radio frequency identification (RFID) reader module comprises microwave radio circuit, baseband processing circuitry and feed circuit, and the microwave radio circuit is made of radiating circuit and receiving circuit.
2. ultrahigh frequency radio frequency identification (RFID) reader module according to claim 1, it is characterized in that: after the signal that the carrier wave combiner circuit of described radiating circuit produces inputs to after buffering is amplified and equilibrates to imbalance converter, again through prime amplifier, power amplifier, radio frequency low-pass filter, directional coupler to antenna connector.
3. ultrahigh frequency radio frequency identification (RFID) reader module according to claim 2 is characterized in that: described carrier wave combiner circuit is by voltage controlled oscillator in the RFID chip and phase-locked loop circuit, and the outer coupling temperature compensating crystal oscillator of RFID chip constitutes.
4. ultrahigh frequency radio frequency identification (RFID) reader module according to claim 3 is characterized in that: described RFID chip adopts AS3990.
5. according to each described ultrahigh frequency radio frequency identification (RFID) reader module in the claim 1 to 4, it is characterized in that: the signal that the antenna of described receiving circuit receives through the directivity coupling mechanism, equilibrate to imbalance converter, balanced mixing circuit, filtering circuit to digital shaping circuit.
6. ultrahigh frequency radio frequency identification (RFID) reader module according to claim 5 is characterized in that: described baseband processing circuitry adopts field programmable gate array, single-chip microcomputer.
7. ultrahigh frequency radio frequency identification (RFID) reader module according to claim 6 is characterized in that: described field programmable gate array adopts APA150, and single-chip microcomputer adopts C8051F023.
8. ultrahigh frequency radio frequency identification (RFID) reader module according to claim 7, it is characterized in that: described feed circuit provide 3.3V power supply for single-chip microcomputer, for field programmable gate array provides 3.3V and 2.5V power supply, for the RFID chip provides 5.3V power supply, for the lawnmower amplifier provides 3V power supply, for radio-frequency power amplifier provides 4.2V power supply.
9. ultrahigh frequency radio frequency identification (RFID) reader module according to claim 8 is characterized in that: the working frequency range of described microwave radio circuit is 860MHz～960MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820235425U CN201374070Y (en) | 2008-12-19 | 2008-12-19 | Ultrahigh frequency RFID reader module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820235425U CN201374070Y (en) | 2008-12-19 | 2008-12-19 | Ultrahigh frequency RFID reader module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201374070Y true CN201374070Y (en) | 2009-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200820235425U Expired - Lifetime CN201374070Y (en) | 2008-12-19 | 2008-12-19 | Ultrahigh frequency RFID reader module |
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| CN (1) | CN201374070Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255627A (en) * | 2011-03-25 | 2011-11-23 | 苏州奥奎拉电子科技有限公司 | Method for realizing UBox high-speed wireless transmission of data acquisition device |
| CN103606003A (en) * | 2013-12-05 | 2014-02-26 | 上海坤锐电子科技有限公司 | Automatic detuning voltage stabilizing circuit for radio frequency identification tag chip |
| CN103971147A (en) * | 2014-05-23 | 2014-08-06 | 中山达华智能科技股份有限公司 | Ultra-high frequency RFID (Radio Frequency Identification) read-write module |
| CN107292373A (en) * | 2017-06-22 | 2017-10-24 | 深圳逗号互联科技有限公司 | One kind miniaturization hyperfrequency read/write circuit module |
-
2008
- 2008-12-19 CN CN200820235425U patent/CN201374070Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255627A (en) * | 2011-03-25 | 2011-11-23 | 苏州奥奎拉电子科技有限公司 | Method for realizing UBox high-speed wireless transmission of data acquisition device |
| CN103606003A (en) * | 2013-12-05 | 2014-02-26 | 上海坤锐电子科技有限公司 | Automatic detuning voltage stabilizing circuit for radio frequency identification tag chip |
| CN103606003B (en) * | 2013-12-05 | 2016-04-27 | 上海坤锐电子科技有限公司 | The automatic off resonance mu balanced circuit of radio frequency identification label chip |
| CN103971147A (en) * | 2014-05-23 | 2014-08-06 | 中山达华智能科技股份有限公司 | Ultra-high frequency RFID (Radio Frequency Identification) read-write module |
| CN107292373A (en) * | 2017-06-22 | 2017-10-24 | 深圳逗号互联科技有限公司 | One kind miniaturization hyperfrequency read/write circuit module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091230 |