CN105490013A - Radio frequency identification antenna - Google Patents
Radio frequency identification antenna Download PDFInfo
- Publication number
- CN105490013A CN105490013A CN201511030053.9A CN201511030053A CN105490013A CN 105490013 A CN105490013 A CN 105490013A CN 201511030053 A CN201511030053 A CN 201511030053A CN 105490013 A CN105490013 A CN 105490013A
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- CN
- China
- Prior art keywords
- coupling
- rfid antenna
- radiant body
- module
- radiation module
- 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.)
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
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- Waveguide Aerials (AREA)
Abstract
The invention provides a radio frequency identification antenna. The radio frequency identification antenna comprises an insulating substrate, a radiation module and a coupling module, wherein the radiation module is arranged on the insulating substrate; the coupling module is arranged on the insulating substrate, positioned on the two sides of the radiation module and spaced from the radiation module; and the coupling module and the radiation module are arranged in a horizontal line shape. The radio frequency identification antenna has the advantages of high gain, high bandwidth, omnidirectional coupling, wide radiation range, simple structure, relatively low thickness, convenient manufacturing and installing, and the like.
Description
Technical field
The present invention relates to microwave antenna art field, particularly, relate to the RFID antenna of a kind of broadband, omnidirectional's coupling.
Background technology
RFID is the abbreviation of radio RF recognition technology (RadioFrequencyIdentification), RFID is commonly called as electronic tag, RFID technique is that of rising from nineteen nineties utilizes radiofrequency signal to carry out contactless two-way communication, automatically identifies destination object and obtains the wireless communication technology of relevant information.Along with the progress of science and technology, RFID has related to the various aspects of people's daily life, be widely used in the various fields such as industrial automation, business automation, the management of traffic s operation control, the traffic surveillance and control system, Auto Express-way Toll Collector System, Item Management, production line balance automation, gate control system, financial transaction, storehouse management, livestock management, vehicle anti-theft etc. of such as train, RFID technique will become a basic technology of Future Information social construction.
Rfid system normally comprises multiple RFID label tag, the RFID reader with label antenna that at least one communicates with this RFID label tag and the calculation element for controlling this RFID reader.Normally, RFID label tag is made up of RFID label antenna and label chip; RFID reader comprises: for energy or information being provided to the transmitter of RFID label tag and being used for receiving from RFID label tag the receiver of identity and out of Memory; The information that calculation element process is obtained by RFID reader.The transmitter of RFID reader exports RF (RadioFrequency, radio frequency) signal via label antenna, thus generates an electromagnetic field, and this electromagnetic field makes RFID label tag return the RF signal of carry information.
In an rfid tag, the radio wave signal that electromagnetism place produces is sent to label chip via its RFID label antenna, and the current signal of label chip is sent in space by RFID label antenna.Therefore, current signal coupling in one end of RFID label antenna and label chip, radio wave signal coupling in the other end and space.Therefore, the key property of RFID label antenna comprises two aspects, on the one hand for describing the characteristic of the relative label chip of RFID label antenna, i.e. impedance operator, on the other hand for describing the relation property of the radio wave in sky RFID label antenna and space, i.e. radiation characteristic.In RFID label antenna, the Specifeca tion speeification about impedance operator has input impedance, and the major parameter about radiation characteristic has omni-directional, gain (gain), polarization, efficiency etc.
For adapting to the demand of modern communications equipment, the research and development of RFID antenna are mainly carried out towards several aspect, are respectively and reduce size, broadband and multiband work, intelligent Pattern control etc.And omni-directional radio frequency identification antenna in the market all exists, and radiation efficiency is lower, polarization mode is single, bandwidth is narrower, easily by problems such as environmental interference.
Summary of the invention
For defect of the prior art, the object of the present invention is to provide a kind of RFID antenna, this RFID antenna has high-gain, large bandwidth, omnidirectional's coupling, radiation direction is wide, structure is simple, thinner thickness, be convenient to manufacture and the advantage such as installation.
According to an aspect of the present invention, provide a kind of RFID antenna, it is characterized in that, described RFID antenna comprises: insulated substrate; Radiation Module, is arranged on described insulated substrate; Coupling module, is arranged on described insulated substrate, is positioned at the both sides of described Radiation Module, and with described Radiation Module separately, described coupling module and described Radiation Module are that yi word pattern is arranged.
Preferably, described Radiation Module comprises the first radiant body, and described first radiant body comprises: main part; And at least two coupling parts, by described main part side longitudinal extension, described coupling part is connected in same plane internal short-circuit with described main part.
Preferably, described first radiant body comprises two coupling parts, and two described coupling parts lay respectively at the both lateral sides of described main part, forms U-shaped with described main part.
Preferably, the longitudinal length of described coupling part is greater than 0.5 times of the lateral length of described main part, is less than 2 times of the lateral length of described main part.
Preferably, described main part and described coupling part are made by metal material.
Preferably, the spacing between described Radiation Module and described coupling module is greater than 0.001 times of described RFID antenna operation wavelength, is less than 0.01 times of described RFID antenna operation wavelength.
Preferably, described Radiation Module also comprises the second radiant body, and described first radiant body is parallel to each other and interval is arranged.
Preferably, described second radiant body is identical with the structure of described first radiant body.
Preferably, the spacing between described first radiant body and described second radiant body is greater than 0.001 times of described RFID antenna operation wavelength, is less than 0.01 times of described RFID antenna operation wavelength.
Preferably, described first radiant body is connected by the radio-frequency joint of unbalanced feed with described second radiant body.
Preferably, described coupling module at least comprises two coupling bodies, and the side of described Radiation Module is provided with and is at least provided with a described coupling body.
Preferably, the structure of described coupling body is identical with the structure of described first radiant body.
Preferably, the side of described Radiation Module is provided with multiple described coupling body, and between described multiple coupling body, parallel between two and interval is arranged.
Preferably, in described multiple coupling body, spacing is between any two greater than 0.001 times of described RFID antenna operation wavelength, is less than 0.01 times of described RFID antenna operation wavelength.
Preferably, the coupling body of described Radiation Module both sides is symmetrical along the cross central line of described Radiation Module.
RFID antenna of the present invention is arranged at the both sides of Radiation Module by coupling module, and with described Radiation Module separately, in yi word pattern arrangement structure, expanded the angular range of radiation in the near-field region of radiation; And make gain larger in the far-field region of radiation by the superposition of each coupling module, effectively improve decipherment distance, thus at least there is high-gain, large bandwidth, omnidirectional's coupling, radiation direction is wide, structure is simple, thinner thickness, be convenient to the advantages such as manufacture and installation.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is the structural representation of RFID antenna of the present invention; And
Fig. 2 is the radiant body of RFID antenna of the present invention and the structural representation of coupling body.
Reference numeral
1 insulated substrate
21 first radiant bodies
22 second radiant bodies
31 main parts
32 coupling parts
41,42,43,44,45,46 coupling bodies
51,52,53,54,55,56,57 spacing
Embodiment
Below in conjunction with drawings and Examples, technology contents of the present invention is described further.
It should be noted that, " longitudinal direction " that define herein is in embodiments of the present invention the Y-direction in figure, and " transverse direction " is the X-direction in diagram.
Please also refer to Fig. 1 and Fig. 2, which respectively show the structural representation of the structural representation of RFID antenna of the present invention and the radiant body of RFID antenna and coupling body.In the preferred embodiment shown in Fig. 1 and Fig. 2, RFID antenna of the present invention comprises insulated substrate 1, Radiation Module and coupling module.
Insulated substrate 1 provides physical support to described Radiation Module and described coupling module.
Radiation Module is arranged on insulated substrate 1.In the preferred embodiment shown in Fig. 1, described Radiation Module comprises the first radiant body 21 and the second radiant body 22.Second radiant body 22 is identical with the structure of the first radiant body 21, and the first radiant body 21 is parallel to each other and interval is arranged.Preferably, the spacing 51 between the first radiant body 21 and the second radiant body 22 is greater than 0.001 times of described RFID antenna operation wavelength, is less than 0.01 times of described RFID antenna operation wavelength, thus improves the intensity of Energy Coupling.Be connected by the radio-frequency joint of unbalanced feed between first radiant body 21 with the second radiant body 22, form the symmetrical dipole structure of unbalanced feed structure.
In an embodiment of the present invention, the second radiant body 22 is identical with the structure of the first radiant body 21, includes main part 31 and at least two coupling parts 32.Refer to Fig. 2, in the embodiment depicted in figure 2, the shape of main part 31 is roughly rectangular.First radiant body 21 comprises two coupling parts 32.Two coupling parts 32 lay respectively at the both lateral sides of main part 31, two coupling parts 32 by main part 31 side longitudinal extension (Fig. 1 and embodiment illustrated in fig. 2 in, two coupling parts 32 are upwards extended by the upside in theme portion 31).Preferably, the development length of two coupling parts 32 (namely in Fig. 1 along the length of Y-direction) is identical, and is parallel to each other, and forms U-shaped with main part 31.Preferably, the longitudinal length of coupling part 32 is greater than 0.5 times of the lateral length of main part 31, is less than 2 times of the lateral length of main part 31.Main part 31 and coupling part 32 are preferably made by metal material.Coupling part 32 conducts electricity with main part 31 and is connected.Preferably, coupling part 32 is connected in same plane internal short-circuit with main part 31.
Coupling module is arranged on insulated substrate 1, is positioned at the both sides of described Radiation Module, and with described Radiation Module separately, described coupling module and described Radiation Module are that yi word pattern is arranged.Described coupling module at least comprises two coupling bodies, and the side of described Radiation Module is provided with and is at least provided with a coupling body.
Specifically, in the preferred embodiment shown in Fig. 1, described coupling module comprises six coupling bodies.The side (side relative with the first radiant body 21 side) that the side (side relative with the second radiant body 22 side) of the first radiant body 21 is provided with three coupling bodies 41,42 and 43, second radiant body 22 is provided with three coupling bodies 44,45 and 46.Preferably, be between the first radiant body 21, second radiant body 22 and coupling body 41,42,43,44,45 and 46 and be arranged in parallel, make to be parallel tight setting between its parallel coupled line.
Preferably, the spacing between described Radiation Module and described coupling module is greater than 0.001 times of described RFID antenna operation wavelength, is less than 0.01 times of described RFID antenna operation wavelength, thus improves the intensity of Energy Coupling.In the embodiment shown in fig. 1, the spacing between described Radiation Module and described coupling module is the spacing 52 between coupling body 43 and the first radiant body 21 or the spacing 53 between coupling body 44 and the second radiant body 22.
Further, for embodiment illustrated in fig. 1, between the multiple coupling bodies 41,42 and 43 being arranged at the side of the first radiant body 21, interval is arranged between two; Also be that interval is arranged between two between the multiple coupling bodies 44,45 and 46 being arranged at the side of the second radiant body 22.Preferably, in multiple coupling body, spacing (spacing 54,55,56,57 namely in Fig. 1 between coupling body 41 and 42 or between coupling body 42 and 43 or between coupling body 44 and 45 or between coupling body 45 and 46) is between any two greater than 0.001 times of described RFID antenna operation wavelength, be less than 0.01 times of described RFID antenna operation wavelength, thus improve the intensity of Energy Coupling.
In embodiment shown in this Fig. 1, the structure of coupling body 41,42,43,44,45 and 46 is preferably identical with the structure of the second radiant body 22 with the first radiant body 21.The coupling body 41,42 and 43 of the first radiant body 21 side and the coupling body 44,45 and 46 of the second radiant body 22 side are symmetrical along the cross central line of spacing between the first radiant body 21 and the second radiant body 22.
It should be noted that, in other embodiments of the invention, the quantity of coupling body can change.Such as, in some embodiments of the invention, the side of the first radiant body 21 only can be provided with a coupling body, and the side of the second radiant body 22 is also only provided with a coupling body; Or the side of the first radiant body 21 can be provided with two coupling bodies, the side of the second radiant body 22 is also provided with two coupling bodies.In addition, the quantity of the coupling body of the first radiant body 21 side also can be different from the coupling body quantity of the second radiant body 22 side, and such as, the side of the first radiant body 21 is provided with three coupling bodies, and the side of the second radiant body 22 is provided with two coupling bodies.Above-described embodiment all can be achieved, and does not repeat them here.
In summary, RFID antenna of the present invention is arranged at the both sides of Radiation Module by coupling module, and with described Radiation Module separately, in yi word pattern arrangement structure, expanded the angular range of radiation in the near-field region of radiation; And make gain larger in the far-field region of radiation by the superposition of each coupling module, effectively improve decipherment distance, thus at least there is high-gain, large bandwidth, omnidirectional's coupling, radiation direction is wide, structure is simple, thinner thickness, be convenient to the advantages such as manufacture and installation.
Although the present invention with preferred embodiment disclose as above, but itself and be not used to limit the present invention.Those skilled in the art, without departing from the spirit and scope of the present invention, when doing various changes and amendment.Therefore, the scope that protection scope of the present invention ought define depending on claims is as the criterion.
Claims (15)
1. a RFID antenna, is characterized in that, described RFID antenna comprises:
Insulated substrate;
Radiation Module, is arranged on described insulated substrate;
Coupling module, is arranged on described insulated substrate, is positioned at the both sides of described Radiation Module, and with described Radiation Module separately, described coupling module and described Radiation Module are that yi word pattern is arranged.
2. RFID antenna according to claim 1, is characterized in that, described Radiation Module comprises the first radiant body, and described first radiant body comprises:
Main part; And
At least two coupling parts, by described main part side longitudinal extension, described coupling part is connected in same plane internal short-circuit with described main part.
3. RFID antenna according to claim 2, is characterized in that, described first radiant body comprises two coupling parts, and two described coupling parts lay respectively at the both lateral sides of described main part, forms U-shaped with described main part.
4. RFID antenna according to claim 2, is characterized in that, the longitudinal length of described coupling part is greater than 0.5 times of the lateral length of described main part, is less than 2 times of the lateral length of described main part.
5. RFID antenna according to claim 2, is characterized in that, described main part and described coupling part are made by metal material.
6. RFID antenna according to claim 1, is characterized in that, the spacing between described Radiation Module and described coupling module is greater than 0.001 times of described RFID antenna operation wavelength, is less than 0.01 times of described RFID antenna operation wavelength.
7. RFID antenna according to any one of claim 1 to 6, is characterized in that, described Radiation Module also comprises the second radiant body, and described first radiant body is parallel to each other and interval is arranged.
8. RFID antenna according to claim 7, is characterized in that, described second radiant body is identical with the structure of described first radiant body.
9. RFID antenna according to claim 7, it is characterized in that, spacing between described first radiant body and described second radiant body is greater than 0.001 times of described RFID antenna operation wavelength, is less than 0.01 times of described RFID antenna operation wavelength.
10. RFID antenna according to claim 7, is characterized in that, described first radiant body is connected by the radio-frequency joint of unbalanced feed with described second radiant body.
11. RFID antenna according to any one of claim 1 to 6 or 8 to 10, it is characterized in that, described coupling module at least comprises two coupling bodies, and the side of described Radiation Module is provided with and is at least provided with a described coupling body.
12. RFID antenna according to claim 11, is characterized in that, the structure of described coupling body is identical with the structure of described first radiant body.
13. RFID antenna according to claim 11, is characterized in that, the side of described Radiation Module is provided with multiple described coupling body, and between described multiple coupling body, parallel between two and interval is arranged.
14. RFID antenna according to claim 13, is characterized in that, in described multiple coupling body, spacing is between any two greater than 0.001 times of described RFID antenna operation wavelength, is less than 0.01 times of described RFID antenna operation wavelength.
15. RFID antenna according to claim 13, is characterized in that, the coupling body of described Radiation Module both sides is symmetrical along the cross central line of described Radiation Module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511030053.9A CN105490013A (en) | 2015-12-31 | 2015-12-31 | Radio frequency identification antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511030053.9A CN105490013A (en) | 2015-12-31 | 2015-12-31 | Radio frequency identification antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105490013A true CN105490013A (en) | 2016-04-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511030053.9A Pending CN105490013A (en) | 2015-12-31 | 2015-12-31 | Radio frequency identification antenna |
Country Status (1)
| Country | Link |
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| CN (1) | CN105490013A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080122628A1 (en) * | 2005-06-16 | 2008-05-29 | Manabu Kai | RFID tag antenna and RFID tag |
| US20100039232A1 (en) * | 2008-08-12 | 2010-02-18 | Industrial Technology Research Institute | Radio-frequency identificaton (rfid) antenna, tags and communications systems using the same |
| CN201601219U (en) * | 2009-12-29 | 2010-10-06 | 中兴通讯股份有限公司 | Card sender and built-in antenna thereof |
| CN102074785A (en) * | 2009-11-19 | 2011-05-25 | 艾迪讯科技股份有限公司 | RF (Radio-Frequency) identification tag antenna with double-ended open-coupling structure and design method thereof |
| CN102110872A (en) * | 2011-03-10 | 2011-06-29 | 江苏拓元科技发展有限公司 | Radio frequency identification tag antenna applicable to non-metallic surface |
| CN202205889U (en) * | 2011-09-06 | 2012-04-25 | 惠州硕贝德无线科技股份有限公司 | Microwave frequency band RFID (Radio Frequency Identification Device) tag antenna applied to nonmetal surface |
| CN102544725A (en) * | 2012-03-28 | 2012-07-04 | 浙江大学 | Metal embedded-type ultrahigh frequency radio frequency identification antenna |
| CN203180054U (en) * | 2013-04-11 | 2013-09-04 | 成都摩宝网络科技有限公司 | Broadband ultrahigh frequency RFID label antenna used for metal surface |
| CN205646138U (en) * | 2015-12-31 | 2016-10-12 | 上海炘璞电子科技有限公司 | Radio -frequency identification antenna |
-
2015
- 2015-12-31 CN CN201511030053.9A patent/CN105490013A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080122628A1 (en) * | 2005-06-16 | 2008-05-29 | Manabu Kai | RFID tag antenna and RFID tag |
| US20100039232A1 (en) * | 2008-08-12 | 2010-02-18 | Industrial Technology Research Institute | Radio-frequency identificaton (rfid) antenna, tags and communications systems using the same |
| CN102074785A (en) * | 2009-11-19 | 2011-05-25 | 艾迪讯科技股份有限公司 | RF (Radio-Frequency) identification tag antenna with double-ended open-coupling structure and design method thereof |
| CN201601219U (en) * | 2009-12-29 | 2010-10-06 | 中兴通讯股份有限公司 | Card sender and built-in antenna thereof |
| CN102110872A (en) * | 2011-03-10 | 2011-06-29 | 江苏拓元科技发展有限公司 | Radio frequency identification tag antenna applicable to non-metallic surface |
| CN202205889U (en) * | 2011-09-06 | 2012-04-25 | 惠州硕贝德无线科技股份有限公司 | Microwave frequency band RFID (Radio Frequency Identification Device) tag antenna applied to nonmetal surface |
| CN102544725A (en) * | 2012-03-28 | 2012-07-04 | 浙江大学 | Metal embedded-type ultrahigh frequency radio frequency identification antenna |
| CN203180054U (en) * | 2013-04-11 | 2013-09-04 | 成都摩宝网络科技有限公司 | Broadband ultrahigh frequency RFID label antenna used for metal surface |
| CN205646138U (en) * | 2015-12-31 | 2016-10-12 | 上海炘璞电子科技有限公司 | Radio -frequency identification antenna |
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| PB01 | Publication | ||
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Application publication date: 20160413 |