CN202677426U - Ultrahigh frequency reader-writer - Google Patents
Ultrahigh frequency reader-writer Download PDFInfo
- Publication number
- CN202677426U CN202677426U CN 201220276347 CN201220276347U CN202677426U CN 202677426 U CN202677426 U CN 202677426U CN 201220276347 CN201220276347 CN 201220276347 CN 201220276347 U CN201220276347 U CN 201220276347U CN 202677426 U CN202677426 U CN 202677426U
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- frequency
- writer
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Abstract
The utility model provides an ultrahigh frequency reader-writer, comprising a control module, a microwave radio frequency module and a base-band processing module which are connected successively; wherein the microwave radio frequency module comprises a transmitting module and a receiving module; the transmitting module comprises a radio frequency local oscillator circuit, a balance-to-unbalance converter, a preamplifier, a power amplifier, a radio frequency low pass filter, a directional coupler, and a radio frequency interface which are electrically connected successively; and the receiving module comprises a balance-to-unbalance converter, and a balance frequency mixing circuit which are electrically connected successively. The ultrahigh frequency reader-writer of the utility model has the beneficial effects of simple structure and reduced cost.
Description
Technical field
The utility model relates to the radio frequency identification equipment field, especially relates to a kind of ultrahigh frequency reader-writer.
Background technology
Ultrahigh frequency carries out radio communication by antenna and RFID electronic tag, can realize reading or write operation tag recognition code and internal storage data.Typical read-write includes high-frequency model (transmitter and receiver), control module and reader antenna.The RFID radio-frequency (RF) identification is a kind of contactless automatic identification technology, and it is automatically identified destination object and obtain related data by radiofrequency signal, and identification work need not manual intervention, can work in various rugged surroundings.The RFID technology can be identified high-speed moving object and can identify simultaneously a plurality of labels, and is swift and convenient to operate.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 simple in structure, ultrahigh frequency reader-writer of reducing cost.
The technical solution of the utility model is: ultrahigh frequency reader-writer, comprise the control module, microwave radio module and the baseband processing module that link to each other successively,
Described microwave radio module comprises transmitter module and receiver module,
Transmitter module comprises successively the radio-frequency (RF) local oscillator circuit that is electrically connected, equilibrates to imbalance converter, prime amplifier, power amplifier, radio frequency low-pass filter, directional coupler, radio frequency interface,
Receiver module comprise successively be electrically connected equilibrate to imbalance converter, balanced mixing circuit.
Further, described baseband processing module comprises filtering circuit, amplifying circuit and the shaping circuit that is electrically connected successively.
Further, described radio-frequency (RF) local oscillator circuit is by interior controlled oscillator and phase-locked loop circuit in the RFID chip, and the outer coupling temperature compensating crystal oscillator of RFID chip consists of, and the carrier signal of 920-925MHz is provided.
Further, described RFID chip is AS3993.
Advantage and the good effect that the utlity model has are: simple in structure, reduction cost.
Description of drawings
Fig. 1 is theory diagram of the present utility model.
Embodiment
As shown in Figure 1, the utility model comprises control module, microwave radio module and the baseband processing module that links to each other successively,
Described microwave radio module comprises transmitter module and receiver module, and described transmitter module is electrically connected with described control module,
Transmitter module comprises successively the radio-frequency (RF) local oscillator circuit that is electrically connected, equilibrates to imbalance converter, prime amplifier, power amplifier, radio frequency low-pass filter, directional coupler, radio frequency interface,
Receiver module comprise successively be electrically connected equilibrate to imbalance converter, balanced mixing circuit,
Described radio-frequency (RF) local oscillator circuit is by interior controlled oscillator and phase-locked loop circuit in the RFID chip, and the outer coupling temperature compensating crystal oscillator of RFID chip consists of, and the carrier signal of 920-925MHz is provided, and described RFID chip is AS3993.
Described baseband processing module comprises filtering circuit, amplifying circuit and the shaping circuit that is electrically connected successively, filtering circuit carries out bandpass filtering to baseband signal, amplifying circuit amplifies baseband signal, and shaping circuit is by using high speed voltage comparator and Schmidt trigger to provide final digital signal as control module.
Transmitter module is received control module control, for read write line provides carrier signal, and output to electronic tag after carrier signal processed, receive simultaneously the reflected signal input receiver module of electronic tag, receiver module is processed the reflected signal that returns of electronic tag, and the output baseband signal is after baseband processing module is processed baseband signal, the accessible useful signal of controlled module reverts to signal the raw information of electronic tag.
More than an embodiment of the present utility model is had been described in detail, but described content only is preferred embodiment of the present utility model, can not be considered to be used to limiting practical range of the present utility model.All equalizations of doing according to the utility model application range change and improve etc., all should still belong within the patent covering scope of the present utility model.
Claims (4)
1. ultrahigh frequency reader-writer is characterized in that: comprise the control module, microwave radio module and the baseband processing module that link to each other successively,
Described microwave radio module comprises transmitter module and receiver module,
Transmitter module comprises successively the radio-frequency (RF) local oscillator circuit that is electrically connected, equilibrates to imbalance converter, prime amplifier, power amplifier, radio frequency low-pass filter, directional coupler, radio frequency interface,
Receiver module comprise successively be electrically connected equilibrate to imbalance converter, balanced mixing circuit.
2. ultrahigh frequency reader-writer according to claim 1 is characterized in that: described baseband processing module comprises filtering circuit, amplifying circuit and the shaping circuit that is electrically connected successively.
3. ultrahigh frequency reader-writer according to claim 1, it is characterized in that: described radio-frequency (RF) local oscillator circuit is by interior controlled oscillator and phase-locked loop circuit in the RFID chip, the outer coupling temperature compensating crystal oscillator of RFID chip consists of, and the carrier signal of 920-925MHz is provided.
4. ultrahigh frequency reader-writer according to claim 3, it is characterized in that: described RFID chip is AS3993.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220276347 CN202677426U (en) | 2012-06-08 | 2012-06-08 | Ultrahigh frequency reader-writer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220276347 CN202677426U (en) | 2012-06-08 | 2012-06-08 | Ultrahigh frequency reader-writer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202677426U true CN202677426U (en) | 2013-01-16 |
Family
ID=47498314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220276347 Expired - Fee Related CN202677426U (en) | 2012-06-08 | 2012-06-08 | Ultrahigh frequency reader-writer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202677426U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103208025A (en) * | 2013-04-27 | 2013-07-17 | 成都九洲电子信息系统股份有限公司 | Ultrahigh-frequency radio frequency identification device (RFID) reader baseband signal processing and modulating circuit |
-
2012
- 2012-06-08 CN CN 201220276347 patent/CN202677426U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103208025A (en) * | 2013-04-27 | 2013-07-17 | 成都九洲电子信息系统股份有限公司 | Ultrahigh-frequency radio frequency identification device (RFID) reader baseband signal processing and modulating circuit |
| CN103208025B (en) * | 2013-04-27 | 2016-03-16 | 成都九洲电子信息系统股份有限公司 | Ultrahigh frequency RFID reader baseband signal process and modulation circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130116 Termination date: 20130608 |