CN203180054U - Broadband ultrahigh frequency RFID label antenna used for metal surface - Google Patents
Broadband ultrahigh frequency RFID label antenna used for metal surface Download PDFInfo
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- CN203180054U CN203180054U CN 201320181043 CN201320181043U CN203180054U CN 203180054 U CN203180054 U CN 203180054U CN 201320181043 CN201320181043 CN 201320181043 CN 201320181043 U CN201320181043 U CN 201320181043U CN 203180054 U CN203180054 U CN 203180054U
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- rfid label
- patch
- parasitic patch
- label antenna
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Abstract
This utility model discloses a broadband ultrahigh frequency RFID label antenna used for a metal surface. The broadband ultrahigh frequency RFID label antenna comprises an RFID label chip, a short circuit chip, a drive patch, a feeder line, a first parasitic patch and a second parasitic patch. The first parasitic patch and the second parasitic patch are relatively coupled to the two sides of the drive patch. The first parasitic patch is coupled to the drive patch at a position 1mm away from the drive patch. The second parasitic patch is coupled to the drive patch at a position 2mm away from drive patch. The RFID label chip is arranged on the feeder line. The size of the feeder line is 3mm*30mm. The size of the drive patch is 34mm*85.5mm. The size of the first parasitic patch is 34mm*85mm. The size of the second parasitic patch is 34mm*84.5mm. The RFID label antenna employs a 1.66mm FR4 dielectric slab with a dielectric constant of 4.4. The broadband ultrahigh frequency RFID label antenna completely covers the frequency domain of an ultrahigh frequency RFID system and has an antenna power reflection coefficient lower than -7dB within the frequency domain of the ultrahigh frequency RFID system. The electronic label can be pasted on the surface of a metal to be used and is worth of being generalized.
Description
Technical field
The utility model relates to a kind of RFID label antenna, relates in particular to a kind of broadband UHF RFID label antenna for the metal surface.
Background technology
Radio RF recognition technology is the non-contact automatic identification technology that utilizes RF-wise to carry out, it has the precision height, adaptive capacity is strong, anti-interference many advantages such as strong, in recent years, along with the RFID technology of low frequency and high frequency gradually by commercialization widely, (840-960MHz) REID are because decipherment distance is far away, accuracy rate is high for hyperfrequency, speed is fast, has waited until widely and has paid close attention to.
A basic rfid system comprises read write line.3 parts of electronic tag and data management system, wherein label antenna is the rfid system key position, the quality that it and chip impedance are mated has very big influence to systematic function.The label antenna main performance index comprises the reflection coefficient of power of antenna, size, reading/writing distance and antenna are to compatibility of adhesion object etc., what use more RFID label antenna now is the printed dipole sub antenna, but in a lot of occasions, the RFID label antenna need stick on the metallicity object, the dipole label antenna that is widely used in this case is because antenna impedance, directional diagrams etc. can great changes will take place, so the dipole antenna performance sharply descends, thereby the label antenna that is used for metal object is designed to focus and difficult point for current RFID label antenna research, because all historical reasons, the frequency of the hyper band rfid system that each country distributes is all different, thereby designs one and cover all frequency ranges of ultrahigh frequency RFID system fully (840-960MHz) broadband label antenna is necessary.
The utility model content
The purpose of this utility model provides a kind of simple in structure, easy to use with regard to being in order to address the above problem, and can be used for a kind of broadband UHF RFID label antenna for the metal surface of metal object.
In order to achieve the above object, the utility model has adopted following technical scheme:
The broadband UHF RFID label antenna that is used for the metal surface, comprise RFID label chip, short-circuit piece, driving paster, feeder line, first parasitic patch and second parasitic patch, described first parasitic patch and described second parasitic patch are coupled in the both sides of described driving paster respectively, described first parasitic patch and described driving paster 1mm at interval are coupled, described second parasitic patch and described driving paster 2mm at interval are coupled, and described RFID label chip is arranged on the described feeder line.
Particularly, described feeder line is of a size of 3mm * 30mm, and described driving patch size is 34mm * 85.5mm, and described first parasitic patch is of a size of 34mm * 85mm, and described second parasitic patch is of a size of 34mm * 84.5mm.
Particularly, described RFID label antenna adopts 1.6mm FR4 dielectric-slab, and described dielectric-slab dielectric constant is 4.4.
The beneficial effects of the utility model are:
The utility model is used for the broadband UHF RFID label antenna of metal surface, with respect to most printed dipole sub antenna, it has covered the frequency range of ultrahigh frequency RFID system fully, and the frequency range internal antenna reflection coefficient of power of ultrahigh frequency RFID system all-below the 7dB, this electronic tag can stick on metal object surface.
Description of drawings
Fig. 1 is the utility model antenna structure view.
Among the figure: the 1-RFID label chip, the 2-short-circuit piece, 3-drives paster, 4-feeder line, 5-first parasitic patch, 6-second parasitic patch.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, the broadband UHF RFID label antenna that is used for the metal surface, comprise RFID label chip 1, short-circuit piece 2, drive paster 3, feeder line 4, first parasitic patch 5 and second parasitic patch 6, first parasitic patch 5 and second parasitic patch 6 are coupled in the both sides that drive paster 3 respectively, first parasitic patch 5 is coupled with driving paster 3 interval 1mm, second parasitic patch 6 is coupled with driving paster 3 interval 2mm, and RFID label chip 1 is arranged on the feeder line 4.
Feeder line 4 is of a size of 3mm * 30mm, drives paster 3 and is of a size of 34mm * 85.5mm, and first parasitic patch 5 is of a size of 34mm * 85mm, and second parasitic patch 6 is of a size of 34mm * 84.5mm.
The RFID label antenna adopts 1.6mm FR4 dielectric-slab, and the dielectric-slab dielectric constant is 4.4.
Use the operation principle of a kind of broadband UHF RFID label antenna for the metal surface of the utility model as follows:
The utility model is used for the big or small the same of the size of ground panel of broadband UHF RFID label antenna of metal surface and dielectric-slab, the RFID label chip is arranged on the feeder line, can effectively regulate the impedance of antenna by the position of adjusting the RFID label chip, regulate the RFID label chip and can change real part to the distance on the feeder line, adjusting RFID label chip can change imaginary part to the distance of feeder line lower end, thereby can well realize the conjugate impedance match of antenna impedance and the impedance of RFID label chip.The RFID label chip that adopts adopts the RI-UHF-STRAP-08 of Texas Instruments, and the parallel impedance real part of this chip and imaginary part are respectively 380 Ω and 2.8pf, and the unlatching power of this chip is-13dBm.
The utility model by increase by two the coupling parasitic patch excite two new modes to improve the bandwidth of label antenna, the half of power of antenna can reach 148MHz, the reflection coefficient of power of antenna in ultrahigh frequency RFID system frequency scope, all-below the 7dB.
Claims (3)
1. the broadband UHF RFID label antenna that is used for the metal surface, comprise RFID label chip, short-circuit piece, driving paster and feeder line, it is characterized in that: also comprise first parasitic patch and second parasitic patch, described first parasitic patch and described second parasitic patch are coupled in the both sides of described driving paster respectively, described first parasitic patch and described driving paster 1mm at interval are coupled, described second parasitic patch and described driving paster 2mm at interval are coupled, and described RFID label chip is arranged on the described feeder line.
2. the broadband UHF RFID label antenna for the metal surface according to claim 1, it is characterized in that: described feeder line is of a size of 3mm * 30mm, described driving patch size is 34mm * 85.5mm, described first parasitic patch is of a size of 34mm * 85mm, and described second parasitic patch is of a size of 34mm * 84.5mm.
3. the broadband UHF RFID label antenna for the metal surface according to claim 1 is characterized in that: described RFID label antenna adopts 1.6mm FR4 dielectric-slab, and described dielectric-slab dielectric constant is 4.4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320181043 CN203180054U (en) | 2013-04-11 | 2013-04-11 | Broadband ultrahigh frequency RFID label antenna used for metal surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320181043 CN203180054U (en) | 2013-04-11 | 2013-04-11 | Broadband ultrahigh frequency RFID label antenna used for metal surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203180054U true CN203180054U (en) | 2013-09-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320181043 Expired - Fee Related CN203180054U (en) | 2013-04-11 | 2013-04-11 | Broadband ultrahigh frequency RFID label antenna used for metal surface |
Country Status (1)
| Country | Link |
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| CN (1) | CN203180054U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105490013A (en) * | 2015-12-31 | 2016-04-13 | 上海炘璞电子科技有限公司 | Radio frequency identification antenna |
| CN108574138A (en) * | 2017-03-09 | 2018-09-25 | 南京理工大学 | The microstrip-fed harmonics restraint wideband patch antenna of compact type |
| CN108593713A (en) * | 2018-04-20 | 2018-09-28 | 武汉理工大学 | Passive and wireless paster antenna sensor based on RFID technique and wireless measurement method |
| CN111613890A (en) * | 2020-06-11 | 2020-09-01 | 维沃移动通信有限公司 | Antenna structure and electronic equipment |
-
2013
- 2013-04-11 CN CN 201320181043 patent/CN203180054U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105490013A (en) * | 2015-12-31 | 2016-04-13 | 上海炘璞电子科技有限公司 | Radio frequency identification antenna |
| CN108574138A (en) * | 2017-03-09 | 2018-09-25 | 南京理工大学 | The microstrip-fed harmonics restraint wideband patch antenna of compact type |
| CN108593713A (en) * | 2018-04-20 | 2018-09-28 | 武汉理工大学 | Passive and wireless paster antenna sensor based on RFID technique and wireless measurement method |
| CN111613890A (en) * | 2020-06-11 | 2020-09-01 | 维沃移动通信有限公司 | Antenna structure and electronic equipment |
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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: 20130904 Termination date: 20140411 |