CN201348786Y - Supersensitive radio frequency identification device - Google Patents
Supersensitive radio frequency identification device Download PDFInfo
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- CN201348786Y CN201348786Y CNU2009200785711U CN200920078571U CN201348786Y CN 201348786 Y CN201348786 Y CN 201348786Y CN U2009200785711 U CNU2009200785711 U CN U2009200785711U CN 200920078571 U CN200920078571 U CN 200920078571U CN 201348786 Y CN201348786 Y CN 201348786Y
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- phase shifter
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- rfid device
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Abstract
The utility model discloses a supersensitive radio frequency identification device, which comprises a reader, a sending antenna, a receiving antenna and a passive tag, wherein, the reader is connected with the sending antenna to transmit continuous carrier wave signals; reflection carrier waves reflected by the passive tag are received by the receiving antenna; the receiving antenna is connected with the reader, and transmitted carrier wave signals of the receiving antenna are sent to the reader; one way of the reader is connected with the sending antenna through a coupler; and the other way is serially connected with an attenuator and a phase shifter, and then combined with the receiving antenna through a combiner so as to be connected with the reader. The utility model overcomes the deficiency of the prior art that the continuous carrier wave signals transmitted by the reader interfere reflection carrier wave signals of the passive tag so as to reduce the sensitivity of radio frequency identification; and therefore, the radio frequency identification device provided by the utility model has the advantages of great reduction in background carrier wave signals received by the reader, high sensitivity, simple structure, miniature size, compactness and wide range of application, and can be widely applied to the fields using radio frequency identification, such as supermarkets, warehouses, logistics, automobile identification and the like.
Description
Technical field
The utility model relates to the device of the read-out recording carrier that adopts electromagnetic radiation, is specifically related to highly sensitive rfid device.
Background technology
Radio-frequency (RF) identification (RFID) technology is a kind of contactless automatic identification technology, and its ultimate principle is to utilize the coupling of radiofrequency signal and space thereof, transport property, realize to static or move in the automaton identification of article to be identified.
Radio-frequency recognition system generally is made up of two parts, i.e. electronic tag and reader.Realize space (contactless) coupling of radiofrequency signal between electronic tag and the reader by coupling element, in coupling channel,, realize the transmission of energy, the exchange of data according to sequential relationship.Electronic tag is called radio-frequency (RF) tag, transponder, data carrier again, and electronic tag is the real data carrier of radio-frequency recognition system attached on the article to be identified.Reader is called readout device again, reader can be read/write or read apparatus only, when being used in the article to be identified that are attached with electronic tag pass through its read range, automatically in contactless mode the agreement identifying information in the electronic tag is taken out, thereby realize automatic identify objects or collect the function of article mark information automatically.Generally speaking, electronic tag is made up of label antenna and label special chip.According to the difference of electronic tag power supply mode, can be divided into two kinds of active label (Active tag) and passive labels (Passive tag), battery is housed in the active label, passive label does not have internal battery.The energy of the electric wave that passive label dependence label antenna receives to provide energy to label.
Reader is simple relatively to the communication of passive label, and as shown in Figure 1, passive label receives reader and therefrom extracts the information of communication for the self energizing while from the carrier signal that emitting antenna sends.Communication from the passive label to the reader as shown in Figure 2, make passive label work with regard to more complicated, and reader need not stop to launch the continuous carrier signal, otherwise passive label does not have energy to keep work.Passive label forms reflection carrier signal power by control passive label antenna and reaches the order ground that diffuses information to reader, the passive tag reflects carrier signal energy is little, and the reflection carrier signal of the passive label that reader can receive is just fainter, the continuous carrier that reflects the emission of carrier signal and reader simultaneously is fully with frequently, reader need extract the reflection carrier signal of relatively very faint passive label from very strong background carrier wave, reduce the sensitivity of radio-frequency (RF) identification.Especially in a single aerial system, because the isolation of circulator is undesirable, the mismatch in various degree of emitting antenna, so the carrier signal strength that emitting antenna leaks is just bigger, reduces the sensitivity of radio-frequency (RF) identification especially greatly.
Be called in the CN200510003797.1 patent documentation of " strengthening the device that radio frequency identification signal receives " on 07 19th, 2006 disclosed names, disclose a kind of device of strengthening radio frequency identification signal, but this prior art is by increasing the receiving antenna quantity of reader, the receiving antenna area that increases reader improves radio-frequency (RF) identification sensitivity, exist big, the complex structure of volume, limited to by environment, simultaneously the deficiency that background signal and useful signal are amplified.
Summary of the invention
The utility model has overcome the deficiencies in the prior art, and the device of the radio-frequency (RF) identification that improves sensitivity is provided.
For solving above-mentioned technical matters, the utility model by the following technical solutions:
A kind of highly sensitive rfid device, comprise reader, emitting antenna, receiving antenna, passive label, reader links to each other with emitting antenna, launch the continuous carrier signal, the reflection carrier wave of passive tag reflects is received antenna and receives, receiving antenna links to each other with the reader emission, and sends into reader; Reader is through one the tunnel linking to each other with emitting antenna behind the coupling mechanism, and other one the tunnel connects behind attenuator, the phase shifter and receiving antenna is connected into reader after through the combiner merging more successively.
Further technical scheme is that attenuator is an electrically controlled attenuator, and phase shifter is a voltage controlled phase shifter, between voltage controlled phase shifter and the combiner, and the electric-controlled switch of also having connected.
Further technical scheme is that electrically controlled attenuator, voltage controlled phase shifter, electric-controlled switch are controlled by the master cpu of reader.
Further technical scheme is that electrically controlled attenuator is the PIN diode attenuator.
Further technical scheme is that voltage controlled phase shifter is any one of varactor phase shifter, circulator phase shifter or three decibels electric bridge phase shifter.
Further technical scheme is that electric-controlled switch is a pin diode switch.
Further technical scheme be electric-controlled switch be the AS193-73LF of SKYWORKS company or MACOM company MASWSS0181 any one.
Further technical scheme be combiner be the MAPDCC0001 of MACOM company or ANAREN company PD0810J5050S2 any one.
Further technical scheme is to adopt circulator, and described emitting antenna and receiving antenna are merged.
Further technical scheme is that circulator is the MAFRIN0497 of MACOM company.
Compared with prior art, the beneficial effects of the utility model are to have subtracted the background carrier signal that reader receives greatly, rfid device highly sensitive, and simple in structure, compact, and usable range is wide.
Description of drawings
Fig. 1 is the structural representation of reader to the communication of passive label.
Fig. 2 be in the prior art passive label to the structural representation of the communication of reader.
Fig. 3 is the structural representation of passive label of the present utility model to the communication of reader.
Fig. 4 is the synoptic diagram of the utility model embodiment 1.
Fig. 5 is the synoptic diagram of the utility model embodiment 2.
Embodiment
Below in conjunction with accompanying drawing the utility model is further elaborated.
Embodiment 1
As shown in Figure 4, a kind of highly sensitive rfid device, comprise reader, emitting antenna, receiving antenna, passive label, reader links to each other with emitting antenna by coupling mechanism, launch the continuous carrier signal, the reflection carrier wave of passive tag reflects is received antenna and receives, receiving antenna links to each other with combiner; Reader is through one the tunnel linking to each other with emitting antenna behind the coupling mechanism, and other one the tunnel connects successively is connected into reader behind the AS193-73LF electric-controlled switch of PIN diode attenuator, varactor phase shifter, SKYWORKS company with after the MAPDCC0001 combiner merging of receiving antenna by MACOM company again.
The ultimate principle of present embodiment is the carrier signal from the reader emission, after behind the AS193-73LF electric-controlled switch of coupling mechanism processing, PIN diode attenuator, varactor phase shifter, SKYWORKS company, it is identical to obtain a carrier signal amplitude that receives with receiving antenna, but the signal that phase place is opposite goes to offset the carrier signal of receiving antenna with this signal.The background carrier signal that receives has just weakened greatly, and the signal of tag reflection has just detected easily.Before each the reading, disconnect electric-controlled switch earlier, detect carrier amplitude and phase place that receiving antenna receives.When receiving label signal, connect electric-controlled switch, control electrically controlled attenuator and voltage controlled phase shifter produce and suitably offset the carrier wave that signal receives with counteracting.
Embodiment 2
As shown in Figure 5, a kind of highly sensitive rfid device uses circulator, and emitting antenna and receiving antenna are merged into a transceiving integrated antenna.Circulator is the MAFRIN0497 of MACOM company.Coupling mechanism links to each other with the emission port of circulator, and antenna links to each other with the antenna port of circulator, and the receiving port of circulator links to each other with combiner.Antenna is launched the continuous carrier signal, and the reflection carrier wave of passive tag reflects is received by antenna.Reader is through one the tunnel linking to each other with circulator behind the coupling mechanism, and other one the tunnel connects behind the MASWSS0181 electric-controlled switch of PIN diode attenuator, three decibels electric bridge phase shifter, MACOM company successively is connected into reader after the electromagnetic wave merging of receiving by the PD0810J5050S2 combiner and the circulator of ANAREN company with circulator again.
The ultimate principle of present embodiment is the carrier signal from the reader emission, after behind the MASWSS0181 electric-controlled switch of coupling mechanism processing, PIN diode attenuator, three decibels electric bridge phase shifter, MACOM company, it is identical to obtain a carrier signal amplitude of receiving with circulator, but the signal that phase place is opposite goes to offset the carrier signal that circulator receives with this signal.The background carrier signal that receives has just weakened greatly, and the signal of tag reflection has just detected easily.
Claims (10)
1, a kind of highly sensitive rfid device, comprise reader, emitting antenna, receiving antenna, passive label, reader links to each other with emitting antenna, launch the continuous carrier signal, the reflection carrier wave of passive tag reflects is received antenna and receives, receiving antenna links to each other with the reader emission, and sends into reader; It is characterized in that reader through one the tunnel linking to each other with emitting antenna behind the coupling mechanism, other one the tunnel connects behind attenuator, the phase shifter and receiving antenna is connected into reader after through the combiner merging more successively.
2, highly sensitive rfid device according to claim 1 is characterized in that described attenuator is an electrically controlled attenuator, and phase shifter is a voltage controlled phase shifter, between voltage controlled phase shifter and the combiner, and the electric-controlled switch of also having connected.
3, highly sensitive rfid device according to claim 2 is characterized in that described electrically controlled attenuator, voltage controlled phase shifter, electric-controlled switch controlled by the master cpu of reader.
4, highly sensitive rfid device according to claim 3 is characterized in that described electrically controlled attenuator is the PIN diode attenuator.
5, highly sensitive rfid device according to claim 3 is characterized in that described voltage controlled phase shifter is any one of varactor phase shifter, circulator phase shifter or three decibels electric bridge phase shifter.
6, highly sensitive rfid device according to claim 3 is characterized in that described electric-controlled switch is a pin diode switch.
7, highly sensitive rfid device according to claim 3, it is characterized in that described electric-controlled switch be the AS193-73LF of SKYWORKS company or MACOM company MASWSS0181 any one.
8, highly sensitive rfid device according to claim 3, it is characterized in that described combiner be the MAPDCC0001 of MACOM company or ANAREN company PD0810J5050S2 any one.
9, according to claim 1 to the described highly sensitive rfid device of the arbitrary claim of claim 8, it is characterized in that adopting circulator, described emitting antenna and receiving antenna are merged.
10, require described highly sensitive rfid device according to claim 9, it is characterized in that described circulator is the MAFRIN0497 of MACOM company.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200785711U CN201348786Y (en) | 2009-01-08 | 2009-01-08 | Supersensitive radio frequency identification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200785711U CN201348786Y (en) | 2009-01-08 | 2009-01-08 | Supersensitive radio frequency identification device |
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| Publication Number | Publication Date |
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| CN201348786Y true CN201348786Y (en) | 2009-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2009200785711U Expired - Lifetime CN201348786Y (en) | 2009-01-08 | 2009-01-08 | Supersensitive radio frequency identification device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101794370A (en) * | 2010-04-09 | 2010-08-04 | 深圳市远望谷信息技术股份有限公司 | Method and device for remotely testing receiver sensitivity of radio frequency identification reader |
| CN103218644A (en) * | 2013-05-08 | 2013-07-24 | 岳流锋 | Carrier-wave-cancelled ultrahigh-frequency electronic tag reader |
| CN106299691A (en) * | 2016-08-09 | 2017-01-04 | 中国舰船研究设计中心 | There is two-stage and offset the dual-mode antenna co-located coupled interference restraining device of function |
| CN108011644A (en) * | 2017-11-29 | 2018-05-08 | 浙江大华技术股份有限公司 | A kind of method and device for eliminating adjacent-channel interference |
| CN108596322A (en) * | 2018-06-11 | 2018-09-28 | 上海双十信息科技有限公司 | A kind of ultrahigh frequency RFID device and method of label independence energy supply |
| CN109525279A (en) * | 2018-10-16 | 2019-03-26 | 北京千方科技股份有限公司 | A kind of self-interference cancellation element, frequency read/write and radio-frequency recognition system |
| CN110112539A (en) * | 2019-05-31 | 2019-08-09 | 无锡品冠物联科技有限公司 | A kind of signal transmitting apparatus and signal shift antenna |
| CN110889480A (en) * | 2019-12-23 | 2020-03-17 | 浙江悦和科技有限公司 | Passive sensing circuit and control method thereof |
| CN111614364A (en) * | 2020-05-22 | 2020-09-01 | 南方科技大学 | RFID reader-writer and carrier suppression method thereof |
| CN113346922A (en) * | 2021-06-30 | 2021-09-03 | 广州市埃特斯通讯设备有限公司 | Prevent ETC antenna device of adjacent channel interference |
-
2009
- 2009-01-08 CN CNU2009200785711U patent/CN201348786Y/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101794370B (en) * | 2010-04-09 | 2012-01-11 | 深圳市远望谷信息技术股份有限公司 | Method and device for remotely testing receiver sensitivity of radio frequency identification reader |
| CN101794370A (en) * | 2010-04-09 | 2010-08-04 | 深圳市远望谷信息技术股份有限公司 | Method and device for remotely testing receiver sensitivity of radio frequency identification reader |
| CN103218644A (en) * | 2013-05-08 | 2013-07-24 | 岳流锋 | Carrier-wave-cancelled ultrahigh-frequency electronic tag reader |
| CN103218644B (en) * | 2013-05-08 | 2017-03-15 | 岳流锋 | A kind of super high frequency electronic label read/write of carrier wave cancellation |
| CN106299691A (en) * | 2016-08-09 | 2017-01-04 | 中国舰船研究设计中心 | There is two-stage and offset the dual-mode antenna co-located coupled interference restraining device of function |
| CN106299691B (en) * | 2016-08-09 | 2019-03-15 | 中国舰船研究设计中心 | Inhibit device with the co-located coupled interference of dual-mode antenna that two-stage offsets function |
| CN108011644B (en) * | 2017-11-29 | 2019-11-19 | 浙江大华技术股份有限公司 | A kind of method and device for eliminating adjacent-channel interference |
| CN108011644A (en) * | 2017-11-29 | 2018-05-08 | 浙江大华技术股份有限公司 | A kind of method and device for eliminating adjacent-channel interference |
| CN108596322A (en) * | 2018-06-11 | 2018-09-28 | 上海双十信息科技有限公司 | A kind of ultrahigh frequency RFID device and method of label independence energy supply |
| CN108596322B (en) * | 2018-06-11 | 2023-12-15 | 上海双十信息科技有限公司 | Ultrahigh frequency RFID device and method with independent energy supply of labels |
| CN109525279A (en) * | 2018-10-16 | 2019-03-26 | 北京千方科技股份有限公司 | A kind of self-interference cancellation element, frequency read/write and radio-frequency recognition system |
| CN110112539A (en) * | 2019-05-31 | 2019-08-09 | 无锡品冠物联科技有限公司 | A kind of signal transmitting apparatus and signal shift antenna |
| CN110889480A (en) * | 2019-12-23 | 2020-03-17 | 浙江悦和科技有限公司 | Passive sensing circuit and control method thereof |
| CN111614364A (en) * | 2020-05-22 | 2020-09-01 | 南方科技大学 | RFID reader-writer and carrier suppression method thereof |
| CN111614364B (en) * | 2020-05-22 | 2022-03-01 | 南方科技大学 | RFID reader-writer and carrier suppression method thereof |
| CN113346922A (en) * | 2021-06-30 | 2021-09-03 | 广州市埃特斯通讯设备有限公司 | Prevent ETC antenna device of adjacent channel interference |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHENGDU JIUZHOU ELECTRONIC INFORMATION SYSTEM CO., Free format text: FORMER NAME: CHENGDU JIUZHOU ELECTRONIC INFORMATION SYSTEMS CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 610000 A2, Tianfu Software Park, 765 Tianfu Road, Chengdu high tech Zone, Sichuan Patentee after: Chengdu Jiuzhou Electronic Information System Co., Ltd. Address before: 610000 A2, Tianfu Software Park, 765 Tianfu Road, Chengdu high tech Zone, Sichuan Patentee before: Chengdu Jiuzhou Electronic Information Systems Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091118 |