CN102332634A - Dual-mode antenna for radio frequency identification and radio frequency identification device - Google Patents
Dual-mode antenna for radio frequency identification and radio frequency identification device Download PDFInfo
- Publication number
- CN102332634A CN102332634A CN2010102240139A CN201010224013A CN102332634A CN 102332634 A CN102332634 A CN 102332634A CN 2010102240139 A CN2010102240139 A CN 2010102240139A CN 201010224013 A CN201010224013 A CN 201010224013A CN 102332634 A CN102332634 A CN 102332634A
- Authority
- CN
- China
- Prior art keywords
- antenna
- radio frequency
- frequency
- dual
- frequency identification
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Near-Field Transmission Systems (AREA)
Abstract
The invention relates to a radio frequency identification (RFID) dual-mode antenna for a high-frequency (HF) and ultrahigh-frequency (UHF) ticket checking system, which is mainly used for realizing the high-isolation design, perfect compatibility and no mutual impact of two types of different-frequency-band antennas. The radio frequency antenna comprises an HF closed-loop antenna and an UHF ceramic antenna array. The ceramic antenna array is controlled to switch by a micro control unit (MCU) through radio frequency switches, so as to enable antenna branches to be conducted by turns. On the premise that the magnetic induction lines of the HF antenna is not affected, the goal that the two types of different-frequency-band antennas work at the same time is realized. The RFID dual-mode antenna has the advantages that the problem in the electromagnetic compatibility of a UH radio frequency antenna can be solved, the evenness of ticket reading is guaranteed, the situation of misreading is precluded and the safety of ticket check is ensured.
Description
Technical field
The present invention relates to the radio frequency identification applied technical field, particularly a kind of radio frequency bill the swipe the card dual-mode antenna and radio frequency identification device in field of being used for.
Background technology
Radio frequency identification (RFID) is a kind of contactless automatic identification technology.In rfid system, identifying information leaves in the electric data carrier, and electric data carrier becomes transponder.The identifying information of depositing in the transponder is read by reader, and in some applications, reader not only can be read the information of depositing, and can transponder write data, and the bipartite radio communication of passing through of read-write realizes.
RFID is divided into low frequency (LF), high frequency (HF), hyperfrequency (UHF), microwave (MW) by the difference of applying frequency; Corresponding representative frequency is respectively: below the low frequency 135KHz, high frequency 13.56MHz, hyperfrequency 860M-960MHz, microwave 2.4G, and 5.8G.
According to the difference of RF-coupled mode, RFID can be divided into inductance coupling high mode (magnetic coupling) and backscattering coupled modes (electromagnetic field couples) two big classes.
Wherein, the carrier frequency of inductance coupling high mode
(being also referred to as operating frequency) is for 13.56MHz with less than the frequency range of 135kHz.The transponder of inductance coupling high mode nearly all is passive, and energy obtains from reader.Because the magnetic field intensity that reader produces receives the strictness restriction of Electro Magnetic Compatibility related standards, so the operating distance between reader and the transponder is very near, generally below one meter.
Superfrequency (UHF) and hyperfrequency (SHF) adopt RFID backscattering coupled modes.When electromagnetic wave ran into extraterrestrial target (transponder), its energy part was by target absorption, and another part is dispersed into all directions with different intensity.In the energy of scattering, a part has been scattered back transmitting antenna (transmitting antenna also is a reception antenna thus), and is received by this antenna and to amplify to received signal and handle, and can obtain target for information about.
Respond to this magnetic field owing to the HF bill utilizes inductance coupling high for received energy, wavelength is longer, belongs to the inductive type antenna, therefore needs more conductive material to realize.And the UHF bill can obtain identical near-field energy equally at an easy rate, and efficient and cost benefit are higher.Therefore, UHF can than HF more easily be used for the near field more efficiently, this means that the UHF system can be included in liquid and tenor high ambient than reading the more information that HF can read at complex environment more.
Along with the development of technology, the UHF technical advantage is more and more obvious, and its overall application is also irresistible.The common use of HF and UHF also becomes the demand in epoch.Therefore the bimodulus application system of developing HF and UHF is necessary.
Patent 200820118681.1 provides a kind of radio frequency identifying antenna module; Comprise substrate; Be arranged at block antenna and plated circuit microstrip antenna on the substrate; And the plated circuit microstrip antenna is around this bulk antenna, and wherein block antenna for example is a ultra-high frequency antenna, and the printed circuit microstrip antenna for example is a high frequency antenna.Improved the operating frequency range of Anneta module through the antenna co-operation of two different frequency ranges.Yet; The problem that causes the antenna of different frequency range to interfere with each other easily like its described radio frequency identifying antenna module; And, because single ultra-high frequency antenna exists the inhomogeneous of signal strength signal intensity in limitation and the induction range of identified region when identification radio frequency bill, the reading height and can reduce of antenna in some zone; It is range limited to make the radio frequency bill swipe the card, the phenomenon that also is easy to generate radio frequency bill mistake brush and leaks brush.
Moreover; Patent application 200410039489.x provides a kind of antenna suitching type radio frequency reading target automatic positioning equipment and localization method; Automatic positioning equipment comprises radio-frequency card reader and the radio frequency card reading antennas that single-chip data treatment circuit, radio-frequency transmissions circuit, RF receiving circuit are formed, and a plurality of antennas are connected with radio-frequency card reader through antenna switcher.A plurality of radio-frequency antennas be installed in to search the predetermined point position in target zone of living in; Antenna switcher is switched the radio frequency card reading antennas according to the switching command that receives; Read the radio frequency marking card of different azimuth, the target that has radio frequency marking card in is on a large scale searched and located.But patent application 200410039489.x is because it is used for the radio frequency positioning field; Purpose is to realize searching automatically and locating of internal object on a large scale; Its device and the size of power all are not suitable for the radio frequency bill field of swiping the card, and can not solve in the prior art because the even radio frequency bill mistake brush that brings of inequality signal and leak the problem of brushing in the antenna induction scope.
Defective in view of above-mentioned existing radio frequency identifying antenna exists the invention provides a kind of dual-mode antenna and radio frequency identification device.
Summary of the invention
The present invention provides a kind of dual-mode antenna that is used for radio frequency identification; Be applied to the RFID dual-mode antenna of HF and UHF ticket-checking system; Realize the height isolation of two different frequency range antenna; Compatible and be independent of each other, and improve the uniformity of signal in the induction range of radio-frequency antenna, solve because the inhomogeneous radio frequency bill mistake brush that brings of signal and the problem of leaking brush in the radio-frequency antenna induction range.
The technical scheme that the present invention solves the problems of the technologies described above is following: a kind of dual-mode antenna that is used for radio frequency identification; Comprise substrate, be arranged on inductance coupling high closed loop antenna and backscattering coupled antenna array on the substrate; Backscattering coupled antenna array comprises n (n >=2; N is an integer) individual antenna subelement, said adjacent antenna subelement is distributed in HF antenna central authorities to differ 360 °/n even angle; Said backscattering coupled antenna array also comprises and is used for the in turn radio frequency diverter switch of each antenna subelement of conducting, and the control circuit that switches of control radio frequency diverter switch.
The invention has the beneficial effects as follows: adopt the compound mode of above-mentioned aerial array to give the sufficient diffraction of the magnetic line of force space of 13.56MHz antenna; Under the prerequisite that does not influence the inductance coupling high mode; Realize the backscattering coupling of oneself, realized the use of dual-mode antenna co-operation; And owing to each antenna subelement evenly distributes, and take turns to operate, can reduce the phase mutual interference of each antenna subelement of uhf band through diverter switch; And guaranteed the uniformity of signal in uhf band antenna induction scope; Realize that induction range is comprehensive, even,, effectively stopped owing to the even radio frequency bill that brings of inequality signal reads the phenomenon that the bill mistake is brushed and leakage is brushed that highly reduction produces in some zone apart from moderate purpose; Guarantee the fail safe of ticket checking; Because HF and two band antennas of UHF are arranged on the same substrate, save the space in addition, met the swipe the card needs of miniaturization of radio frequency bill.
On the basis of technique scheme, the present invention can also do following improvement.
Further, said backscattering coupled antenna array is the ceramic antenna array.
The present invention also provides a kind of radio frequency identification device, comprises radio frequency signal processing circuit, and the aforesaid dual-mode antenna that is connected with said radio frequency signal processing circuit is arranged.
Further, said inductance coupling high closed loop antenna is the HF band antenna, and said backscattering coupled antenna array is the uhf band antenna.
Further, said radio frequency signal processing circuit comprises the HF read circuit that is connected and is used to read the HF frequency band signals with the HF band antenna, and is connected and is used to read the UHF read circuit of uhf band signal with the uhf band antenna.
Description of drawings
Fig. 1 is a kind of embodiment of dual-mode antenna of the present invention (is example with 4 cell arrays) structural representation;
Fig. 2 is the bill area schematic of embodiment among Fig. 1;
Fig. 3 is a kind of radio frequency identification device structured flowchart of the present invention;
Fig. 4 is the fundamental diagram of inductance coupling high closed loop antenna in an embodiment of the present invention;
Fig. 5 is the fundamental diagram of backscattering coupled antenna array in an embodiment of the present invention;
Fig. 6 reads distance range sign sketch map for bill in an embodiment of the present invention;
Fig. 7 is a single ceramic read range sketch map in an embodiment of the present invention;
Fig. 8 is an array antenna read range sketch map in an embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing principle of the present invention and characteristic are described, institute gives an actual example and only is used to explain the present invention, is not to be used to limit scope of the present invention.
As shown in Figure 1; A kind of bimodulus radio-frequency antenna comprises a closed loop radio-frequency antenna 11 and a ceramic RF aerial array 12 of being arranged on the same pcb board, wherein; Radio-frequency antenna 11 is the inductance coupling high closed loop antenna; Be operated in high frequency HF frequency range, radio-frequency antenna array 12 is backscattering coupled antenna array, is operated in the superfrequency uhf band.
Described ceramic antenna array 12 comprises the ceramic antenna subelement (13,14,15 of 4 915MHz; 16) be arranged at closed loop radio-frequency antenna 11 central authorities, be evenly distributed on 360 ° the circle, each antenna subelement is responsible for the induction region around own; And each antenna subelement is through RF switch (17; 18) be connected with control circuit, take turns conducting, promptly avoided interfering with each other between each sub-antennas unit with very fast switching frequency.The compound mode of said ceramic antenna array; Give the sufficient diffraction of the magnetic line of force space of 13.56MHz antenna, under the prerequisite that does not influence antenna 11 inductance coupling high modes, realized the backscattering coupling of oneself; Reach both and work simultaneously, the purpose that is independent of each other.
As shown in Figure 2, when two different band antennas will be worked simultaneously, when the radio frequency bill of HF frequency range 13.56MHz appears at the I district; The II district, III district, any place in IV district; Because antenna 11 can not receive the influence of aerial array 12; All have the coupling magnetic line of force in whole zone, the radiofrequency signal of HF frequency range is easy to sensed, and information is passed to reader carries out reprocessing.When the radio frequency bill of uhf band 915MHz appeared at inclined to one side I district or central area, if I district's antenna 13 just conductings this moment, antenna was in state of activation; The bill chips is activated, and information is passed to reader, accomplishes reading of information; At this moment the antenna in other districts will not participated in the conducting that this is taken turns; Can not be activated, this takes turns a then meeting conducting antenna 13 of conducting, and the next round conducting still can be from antenna 13 beginnings.If the radio frequency bill of 915MHz appears at inclined to one side I district; And this moment, I district antenna just broke off; II district antenna 14 is started working, owing to do not read radiofrequency signal, conducting state will continue in turn at 14 duration of works; Antenna 15 will be continued conducting scanning, up to next round antenna 13 be activated read radiofrequency signal till.Because switching frequency is than higher, the radio frequency bill appears at induction zone, and this zone will be by scanning for several times, the situation that therefore brush can not occur leaking.
It is obvious that; The number of the ceramic antenna subelement that ceramic antenna array 12 comprises can be n; N is the arbitrary integer more than or equal to 2, and n ceramic antenna subelement is arranged at closed loop radio-frequency antenna 11 central authorities, and adjacent ceramic antenna subelement distributes with the even angle that differs 360 °/n.
As shown in Figure 3, the present invention also provides a kind of radio frequency identification device, comprises HF frequency range read circuit, uhf band read circuit, and the aforesaid dual-mode antenna that is connected with said radio frequency signal processing circuit is arranged.
Like the fundamental diagram of inductance coupling high closed loop antenna among a kind of embodiment of Fig. 4, bill transponder 22, comprising the HF coil antenna with reply chip.Reader 21 comprises the peripheral HF closed loop antenna 23 among the present invention.Because the wavelength of HF frequency is longer, is about 22.1m, to compare distance between reader and the transponder and want big many, the magnetic line of force that HF closed loop antenna 23 is produced passes the bill antenna, on discounted note, produces induced voltage and comes transmission information.Therefore, the principle of induction of HF can be described as the transmission of inductance coupling high mode realization information.
Among the present invention among a kind of embodiment the fundamental diagram of backscattering coupled antenna array see Fig. 5; Bill chip energy is provided by reader; UHF aerial array 31 emitted power P1 arrive bill antenna 32 after space attenuation; A power part that arrives is absorbed by the bill transponder, and a part is reflected, and the part that is reflected is received by reader antenna 31.Therefore the UHF aerial array is the transmission that realizes information through the mode of backscattering coupling.
Fig. 6 reads distance range sign sketch map for bill in an embodiment of the present invention, because volume restrictions, single ceramic antenna can guarantee certain height that reads in the scope of radius 25mm around it, as shown in Figure 7; The limitation in the zone of swiping the card of single ceramic antenna makes that swiping the card of bill is range limited, can not satisfy the particular user custom;
Adopt many antennas to take turns to operate to make the district that can swipe the card to be evenly distributed on the antenna surface, can guarantee certain height that reads on every side in the scope of radius 60mm, as shown in Figure 8, guarantee that each zone all can brush.
In contrast to many radio-frequency antennas of patent application 200410039489.x and will search the technical scheme of the predetermined point position in target zone of living in being contained in; In can only solving on a large scale, it has the problem that the target of radio frequency marking card is searched and located; Can not reach and make in the antenna induction scope signal even, the problem of avoiding radio frequency bill mistake brush and leaking brush.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. dual-mode antenna that is used for radio frequency identification; Comprise substrate, be arranged on inductance coupling high closed loop antenna and backscattering coupled antenna array on the substrate; It is characterized in that; Said backscattering coupled antenna array comprises n antenna subelement, and n is the integer more than or equal to 2, and said adjacent antenna subelement is distributed in inductance coupling high closed loop antenna central authorities to differ 360 °/n even angle; Said backscattering coupled antenna array also comprises and is used for the in turn radio frequency diverter switch of each antenna subelement of conducting, and the control circuit that switches of control radio frequency diverter switch.
2. dual-mode antenna according to claim 1 is characterized in that, said backscattering coupled antenna array is a backscattering coupling ceramic antenna array.
3. a radio frequency identification device comprises radio frequency signal processing circuit, it is characterized in that, also includes the dual-mode antenna according to claim 1 or claim 2 that is connected with said radio frequency signal processing circuit.
4. radio frequency identification device according to claim 3 is characterized in that, said inductance coupling high closed loop antenna is the HF band antenna, and said backscattering coupled antenna array is the uhf band antenna.
5. radio frequency identification device according to claim 4; It is characterized in that; Described radio frequency signal processing circuit comprises the HF read circuit that is connected and is used to read the HF frequency band signals with the HF band antenna, and is connected and is used to read the UHF read circuit of uhf band signal with the uhf band antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102240139A CN102332634A (en) | 2010-07-12 | 2010-07-12 | Dual-mode antenna for radio frequency identification and radio frequency identification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102240139A CN102332634A (en) | 2010-07-12 | 2010-07-12 | Dual-mode antenna for radio frequency identification and radio frequency identification device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102332634A true CN102332634A (en) | 2012-01-25 |
Family
ID=45484322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102240139A Pending CN102332634A (en) | 2010-07-12 | 2010-07-12 | Dual-mode antenna for radio frequency identification and radio frequency identification device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102332634A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103679223A (en) * | 2012-09-21 | 2014-03-26 | 中兴通讯股份有限公司 | RFID tag issuing method and device |
| CN105764029A (en) * | 2016-04-19 | 2016-07-13 | 福州市佳璞电子商务有限公司 | RFID transceiver, video positioning system based on RFID, and video positioning method based on RFID |
| WO2016141600A1 (en) * | 2015-03-12 | 2016-09-15 | 田艺儿 | 3d wireless radio-frequency identification antenna |
| WO2017023885A1 (en) * | 2015-08-01 | 2017-02-09 | Neology, Inc. | Detachable radio frequency identification switch tag |
| US10102685B2 (en) | 2011-05-06 | 2018-10-16 | Neology, Inc. | Self declaring device for a vehicle using restrict traffic lanes |
| US10140568B2 (en) | 2011-05-06 | 2018-11-27 | Neology, Inc. | RFID switch tag |
| US10262167B2 (en) | 2008-01-31 | 2019-04-16 | Smartrac Technology Fletcher, Inc. | Detachable radio frequency identification switch tag |
| US10339436B2 (en) | 2015-05-21 | 2019-07-02 | Smartrac Technology Fletcher, Inc. | Multi-frequency radio frequency identification tag |
| US10885418B2 (en) | 2011-05-06 | 2021-01-05 | Neology, Inc. | Detachable radio frequency identification switch tag |
| US11403506B2 (en) | 2015-05-21 | 2022-08-02 | Neology, Inc. | Detachable radio frequency identification switch tag |
| US11948035B2 (en) | 2011-05-06 | 2024-04-02 | Neology, Inc. | RFID switch tag |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1577965A (en) * | 2003-07-29 | 2005-02-09 | 株式会社日立国际电气 | Bifrequency shared antenna apparatus |
| CN101038618A (en) * | 2006-12-01 | 2007-09-19 | 华南理工大学 | Intelligent antenna system of RFID reading machine |
| JP2007311955A (en) * | 2006-05-17 | 2007-11-29 | Dainippon Printing Co Ltd | Noncontact ic tag with rear metallic layer |
| CN101299486A (en) * | 2008-06-18 | 2008-11-05 | 北京邮电大学 | RFID reader-writer antenna capable of overlapping high-frequency and ultrahigh frequency as well as microwave frequency band |
| CN101408947A (en) * | 2007-10-09 | 2009-04-15 | 西门子公司 | Wireless radio frequency identification reader-writer and method for implementing antenna switch |
| US20100007570A1 (en) * | 2008-04-07 | 2010-01-14 | Edmond Sardariani | Small profile antenna and rfid device having same |
-
2010
- 2010-07-12 CN CN2010102240139A patent/CN102332634A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1577965A (en) * | 2003-07-29 | 2005-02-09 | 株式会社日立国际电气 | Bifrequency shared antenna apparatus |
| JP2007311955A (en) * | 2006-05-17 | 2007-11-29 | Dainippon Printing Co Ltd | Noncontact ic tag with rear metallic layer |
| CN101038618A (en) * | 2006-12-01 | 2007-09-19 | 华南理工大学 | Intelligent antenna system of RFID reading machine |
| CN101408947A (en) * | 2007-10-09 | 2009-04-15 | 西门子公司 | Wireless radio frequency identification reader-writer and method for implementing antenna switch |
| US20100007570A1 (en) * | 2008-04-07 | 2010-01-14 | Edmond Sardariani | Small profile antenna and rfid device having same |
| CN101299486A (en) * | 2008-06-18 | 2008-11-05 | 北京邮电大学 | RFID reader-writer antenna capable of overlapping high-frequency and ultrahigh frequency as well as microwave frequency band |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10262167B2 (en) | 2008-01-31 | 2019-04-16 | Smartrac Technology Fletcher, Inc. | Detachable radio frequency identification switch tag |
| US10388079B2 (en) | 2011-05-06 | 2019-08-20 | Neology, Inc. | Self declaring device for a vehicle using restrict traffic lanes |
| US11334782B2 (en) | 2011-05-06 | 2022-05-17 | Neology, Inc. | Detachable radio frequency identification switch tag |
| US10671904B2 (en) | 2011-05-06 | 2020-06-02 | Neology, Inc. | RFID switch tag |
| US10733812B2 (en) | 2011-05-06 | 2020-08-04 | Neology, Inc. | Self declaring device for a vehicle using restrict traffic lanes |
| US11948035B2 (en) | 2011-05-06 | 2024-04-02 | Neology, Inc. | RFID switch tag |
| US10147034B2 (en) | 2011-05-06 | 2018-12-04 | Neology, Inc. | RFID switch tag |
| US11775795B2 (en) | 2011-05-06 | 2023-10-03 | Neology, Inc. | Detachable radio frequency identification switch tag |
| US10262253B2 (en) | 2011-05-06 | 2019-04-16 | Neology, Inc. | RFID switch tag |
| US11250647B2 (en) | 2011-05-06 | 2022-02-15 | Neology, Inc. | Self declaring device for a vehicle using restrict traffic lanes |
| US10885418B2 (en) | 2011-05-06 | 2021-01-05 | Neology, Inc. | Detachable radio frequency identification switch tag |
| US10102685B2 (en) | 2011-05-06 | 2018-10-16 | Neology, Inc. | Self declaring device for a vehicle using restrict traffic lanes |
| US10140568B2 (en) | 2011-05-06 | 2018-11-27 | Neology, Inc. | RFID switch tag |
| CN103679223A (en) * | 2012-09-21 | 2014-03-26 | 中兴通讯股份有限公司 | RFID tag issuing method and device |
| WO2016141600A1 (en) * | 2015-03-12 | 2016-09-15 | 田艺儿 | 3d wireless radio-frequency identification antenna |
| US10339436B2 (en) | 2015-05-21 | 2019-07-02 | Smartrac Technology Fletcher, Inc. | Multi-frequency radio frequency identification tag |
| US11403506B2 (en) | 2015-05-21 | 2022-08-02 | Neology, Inc. | Detachable radio frequency identification switch tag |
| US11809937B2 (en) | 2015-05-21 | 2023-11-07 | Neology, Inc. | Detachable radio frequency identification switch tag |
| US10679115B2 (en) | 2015-05-21 | 2020-06-09 | Smartrac Technology Fletcher, Inc. | Multi-frequency radio frequency identification tag |
| WO2017023885A1 (en) * | 2015-08-01 | 2017-02-09 | Neology, Inc. | Detachable radio frequency identification switch tag |
| CN105764029B (en) * | 2016-04-19 | 2021-11-26 | 福州佳璞辨溯科技有限公司 | RFID-based video positioning system and positioning method |
| CN105764029A (en) * | 2016-04-19 | 2016-07-13 | 福州市佳璞电子商务有限公司 | RFID transceiver, video positioning system based on RFID, and video positioning method based on RFID |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102332634A (en) | Dual-mode antenna for radio frequency identification and radio frequency identification device | |
| EP1901202B1 (en) | RF Tag reader and reading method | |
| CN101233700B (en) | RFID reader and RFID system | |
| CN203084751U (en) | RFID mobile communication terminal | |
| CN204537194U (en) | A kind of magnetic-coupled mode of high-frequency electrical that utilizes provides the dual-frequency label of energy for ultrahigh-frequency tag | |
| CN103198283A (en) | Harmonic radio frequency identification system | |
| CN101465468A (en) | Radio frequency identification electronic label antenna with EBG structure | |
| CN101278443A (en) | Antenna system | |
| CN201966314U (en) | Dual-band RF antenna and wireless RFID device | |
| CN202121074U (en) | Antenna for radio frequency identification devices (RFID) readers and RFID reader | |
| KR20100044781A (en) | Method and device for the contact-free transmission of data from and/or to a plurality of data or information carriers, preferably in the form of reid tags | |
| CN101763498A (en) | Area control circuit for passive ultra high frequency radio frequency identification | |
| CN101183431A (en) | Wireless communication system and wireless communication method | |
| CN102236780A (en) | Card reader for high-frequency wireless smart card | |
| CN203276293U (en) | Intelligent positioning management device for test tube | |
| CN105576358A (en) | Label antenna suitable for IT device | |
| CN201936313U (en) | Radio frequency card reading equipment for realizing near field communication | |
| CN106127091A (en) | A kind of intelligent UHFRFID reader based on DSP | |
| Preradovic et al. | Low cost chipless RFID systems | |
| CN102024174A (en) | Radio frequency identification (RFID) tag chip and RFID tag | |
| CN201838006U (en) | Electronic scanning card reader | |
| KR101116133B1 (en) | Device using shelf-shaped antenna | |
| CN2702535Y (en) | Antenna switching type radio-frequency scan object automatic positioning device | |
| CN203813029U (en) | Tag antenna and corresponding optical disc | |
| CN102820519A (en) | Antenna system of RFID reader |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120125 |