CN201466205U - Radio frequency identification tag antenna based on reader placed at high level - Google Patents
Radio frequency identification tag antenna based on reader placed at high level Download PDFInfo
- Publication number
- CN201466205U CN201466205U CN2009201305247U CN200920130524U CN201466205U CN 201466205 U CN201466205 U CN 201466205U CN 2009201305247 U CN2009201305247 U CN 2009201305247U CN 200920130524 U CN200920130524 U CN 200920130524U CN 201466205 U CN201466205 U CN 201466205U
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- antenna
- radio frequency
- frequency identification
- reader
- identification tag
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Abstract
The utility model discloses a radio frequency identification tag antenna based on a reader placed at a high level. The radio frequency identification tag antenna comprises a metal antenna layer and an isotropic medium layer, wherein the metal antenna layer adopts an asymmetric structural deformed dipole antenna which is unsymmetrical horizontally and vertically, to generate a maximum elevation for antenna field gain on a radiation pattern to enable the radio frequency identification label and the reader placed at a high level to provide a longer working distance and to improve the reading efficiency during signal sending and receiving so as to enhance the efficiency of the system. The radio frequency identification tag antenna ensures that an elevation angle is generated on the radiation pattern by adopting the unique asymmetric structural deformed dipole antenna, the antenna field gain at the elevation angle is the largest, to enable the radio frequency identification label and the reader placed at a high level to provide a longer working distance and to improve the reading efficiency during signal sending and receiving, so as to enhance the efficiency and the reliability of the system, and the radio frequency identification tag antenna can be widely applied to the radio frequency identification systems for identity identification, enterprise management, transportation management, logistics and distribution centers.
Description
Technical field
The utility model relates to a kind of label antenna, relates in particular to a kind of radio-frequency (RF) identification (RFID, i.e. RadioFrequency Identification) label antenna.
Background technology
Utilizing radio wave to exchange various data each other on radio-frequency (RF) identification (RFID) overall system with bandwidth.Radio-frequency (RF) identification (RFID) system comprises label and reader, and label comprises unique identifying information (ID), and label is attached on the object.Reader reads identifying information/information is write label from label.
Along with development of market economy, RFID tag is extensive use of by increasing industry owing at a distance, dynamically read the ability of information.For example be used for storehouse management, production line automation, commodity sale in logistics field; Be used for container and parcel management, expressway tol lcollection and Car park payment at traffic and transport field; Be used for the management of flock of sheep, fish, fruit etc. and pet in farming, animal husbandry and fishery, wild animal is followed the tracks of; Be used for pharmaceutical production, patient nursing, medical waste tracking in medical industry; The visualized management that is used for parts and stock in manufacturing industry; RFID tag can also be applied to multiple applications such as books and document management, entrance guard management, location and object tracking, environment sensing and check be false proof.
RFID tag constitutes RFID tag by label antenna and label chip to be needed to obtain energy from the radio frequency beam that reader sends, after over commutation, storage, provide RFID tag required operating voltage, and use the backscattered modulation mode to launch data, it must utilize the signal of the carrier modulation oneself of reader.Label antenna is the Primary Component of RFID electronic labelling system, and the design quality of RFID antenna has bigger influence to the rfid system service behaviour.
The antenna pattern and the label antenna self of at present common RFID antenna are in same plane.As common label is placed horizontal plane, the antenna pattern that gives off of label antenna is also on horizontal plane so thus.
The utility model content
Problem to be solved in the utility model provide a kind of wider bandwidth and higher gain arranged be put in high-order RFID antenna based on reader.
For solving the problems of the technologies described above, the utility model discloses a kind of RFID antenna that is put in a high position based on reader, comprise metal antenna layer and isotropic medium layer, described metal antenna layer be about equal distortion dipole antenna of asymmetric unsymmetric structure up and down, the metal antenna that described metal antenna layer comprises that the metal antenna that is asymmetric " C " shape props up and the below is " one " font props up, between propping up, two metal antennas are the isotropic medium layer, so that on antenna pattern, produce the elevation angle of an antenna gain maximum, thus make RFID tag with place high-order reader that bigger operating distance is provided when transmitting and receiving signal and improve the efficient that the time of reading improves system.
Also be fixed with integrated circuit (IC) chip on the described RFID antenna.
Described RFID antenna is attached on the medium of certain dielectric constant, and preferred described antenna employing etching on dielectric-slab forms, and can certainly be attached directly on the object to be managed.
The beneficial effects of the utility model are: the utility model is by adopting unique unsymmetric structure (about all asymmetric up and down) distortion dipole antenna, make and on antenna pattern, produce an elevation angle, antenna gain maximum on this elevation angle, make RFID tag with place high-order reader that bigger operating distance is provided when transmitting and receiving signal and improve the time of reading, thereby improve the efficient of system. such as, in highway toll collection system, reader generally places the top, expressway, at this moment, the vertical angle that RFID antenna produces, make transfer of data that label and reader are mutual and reader be greatly improved for the time for reading of label. the utility model novelty simple in structure, raw material have been saved, reduced production cost, can only need to obtain required tag antenna structure via simple chemical etching, be easy to production and processing, further reduced production cost, and be easy to produce in batches, the utility model label antenna is compared with the common label antenna, unique radiation vertical angle has more improved operating distance and the efficient that reader places high-order radio-frequency recognition system, increased time for reading, improve the reliability of system, can be widely used in identification, business administration, traffic management, radio-frequency recognition system such as logistics and home-delivery center.
Description of drawings
Fig. 1 a, Fig. 1 b are the schematic diagrames of the utility model specific embodiment RFID label antenna;
Fig. 2 is the reflection coefficient of the utility model specific embodiment RFID antenna and chip link;
Fig. 3 is the E face H face directional diagram of the utility model specific embodiment RFID antenna;
Fig. 4 is the 3D antenna pattern of the utility model specific embodiment RFID antenna;
Fig. 5 is the utility model specific embodiment RFID antenna radar reflection cross section (RCS) resolution chart;
Fig. 6 is the schematic diagram that the utility model specific embodiment RFID antenna is applied in no-stop charging system.
Embodiment
Now with embodiment the utility model is described in further detail in conjunction with the accompanying drawings:
Shown in Fig. 1 a, Fig. 1 b, in the utility model specific embodiment, be put in high-order RFID antenna based on reader, comprise the metal antenna that is asymmetric " C " shape prop up 1 and the metal antenna that is " one " font prop up 2 and isotropic medium layer 3, IC chip 4 is fixed on the antenna by chip location glue.Adding man-hour, antenna only need adopt dielectric-slab by simple chemical etching moulding, the IC chip is fixed on the antenna by chip location glue to get final product again, as can be seen from Figure 1, metal antenna prop up 1 and metal antenna prop up 2 asymmetricly, constitute the dissymmetrical structure up and down of entire antenna; It is asymmetric that metal antenna props up 1 self left and right sides, and it is asymmetric to constitute the entire antenna left and right sides.
With reference to Fig. 2 and Fig. 3, in predetermined communications band, RFID antenna voltage standing wave ratio VSWR performance has well as much as possible realized the nothing consumption transmission of antenna and chip chamber in the present embodiment as can be seen; Like this, the energy that receives of RFID antenna can be transferred to radio frequency identification label chip to greatest extent.Simultaneously, the energy of radio frequency identification label chip also can loss-freely to greatest extent be transferred to RFID antenna.Be omnidirectional antenna on the greatest irradiation direction, realized on the scheduled communication direction, reaching 360 ° and do not had zero transmission that falls into; Like this, RFID tag can be on all directions and the radio-frequency identification reader communication.
With reference to Fig. 4, can see clearly, the radiation direction of antenna has a tangible vertical angle, antenna gain maximum on this elevation angle, thus make RFID tag when transmitting and receiving signal, provide bigger operating distance and the efficient that improves the time raising system that reads with placing high-order reader.
Figure 5 shows that the curve chart of the RCS (RCS) of RFID antenna, RCS is when measuring reader different angles incident RFID tag, measured volume reflection from antenna, as can be seen, with 60 ° of level angles be the volume reflection maximum, this has also reflected the elevation angle that antenna produces from another angle, has realized the maximum transmitted of an angle.
With reference to Fig. 6, provided application example that the described RFID antenna of the utility model embodiment is applied in no-stop charging system. in this application example, reader 5 places arranged above expressway, be positioned at a high position, become 60 ° of angles with the highway plane, the downward radiation signal. the label that is made of the described label antenna of the utility model embodiment is positioned over the automobile cab front end, horizontal positioned, 60 ° radiation signal and the reader 5 of facing upward that is formed by the label antenna radiation carries out transfer of data, than common label can be better and reader carry out communication.
The foregoing description only is the preferred embodiment of stating for explanation the utility model; certainly; the utility model also can have other embodiment; under the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection range of claim of the present utility model.
Claims (4)
1. one kind is put in high-order RFID antenna based on reader, it is characterized in that: describedly be put in high-order RFID antenna based on reader and comprise metal antenna layer and isotropic medium layer, described metal antenna layer be about equal distortion dipole antenna of asymmetric unsymmetric structure up and down, the metal antenna that described metal antenna layer comprises that the metal antenna that is asymmetric " C " shape props up and the below is " one " font props up, between propping up, two metal antennas are the isotropic medium layer, so that on antenna pattern, produce the elevation angle of an antenna gain maximum.
2. be put in high-order RFID antenna based on reader according to claim 1, it is characterized in that: also be fixed with integrated circuit (IC) chip on the described RFID antenna.
3. be put in high-order RFID antenna based on reader as described in claim 2, it is characterized in that: described RFID antenna is attached on the medium.
4. be put in high-order RFID antenna based on reader as described in claim 3, it is characterized in that: described RFID antenna employing etching on dielectric-slab forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201305247U CN201466205U (en) | 2009-04-02 | 2009-04-02 | Radio frequency identification tag antenna based on reader placed at high level |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201305247U CN201466205U (en) | 2009-04-02 | 2009-04-02 | Radio frequency identification tag antenna based on reader placed at high level |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201466205U true CN201466205U (en) | 2010-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201305247U Expired - Fee Related CN201466205U (en) | 2009-04-02 | 2009-04-02 | Radio frequency identification tag antenna based on reader placed at high level |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201466205U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103473588A (en) * | 2013-09-01 | 2013-12-25 | 章伟 | RFID (radio frequency identification device) card capable of controlling working distance in real time and control method |
-
2009
- 2009-04-02 CN CN2009201305247U patent/CN201466205U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103473588A (en) * | 2013-09-01 | 2013-12-25 | 章伟 | RFID (radio frequency identification device) card capable of controlling working distance in real time and control method |
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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: 20100512 Termination date: 20140402 |