CN104993223B - Rfid label antenna - Google Patents
Rfid label antenna Download PDFInfo
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- CN104993223B CN104993223B CN201510315556.4A CN201510315556A CN104993223B CN 104993223 B CN104993223 B CN 104993223B CN 201510315556 A CN201510315556 A CN 201510315556A CN 104993223 B CN104993223 B CN 104993223B
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- antenna
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- rfid label
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Abstract
The invention discloses a kind of RFID label antenna, include the first antenna and the second antenna, the scalable adjusting of distance between described the first antenna and the second antenna; Its reading distance is long, and its reading distance can reach 11-13m after tested; Can stretch, length is adjustable, and it is substantially certain that it can be used for width, but on the packaging kit of indefinite length, there is great practical value, every antenna performance is good, standing-wave ratio is little, return loss is low, it is high to gain and possess omni-directional.
Description
Technical field
The present invention relates to a kind of RFID label antenna.
Background technology
At present, RF identification is RFID(RadioFrequencyIdentification) technology, claim again electronic tag, radio frequency identification, that one can be identified specific objective and be read and write related data by radio signals, and without the communication technology of setting up machinery or optics between recognition system and specific objective and contacting. Conventional passive RFID has low frequency (125k ~ 134.2K), high frequency (13.56Mhz), hyperfrequency (860-960MHz). RFID label antenna is as the important component part of rfid system, and its performance will affect the effect and quality of whole rfid system greatly. The principal element that affects RFID antenna performance comprises the size of antenna, working frequency range, impedance and gain etc. General conventional RFID antenna often adopts bending line style dipole form, is convenient to reduce antenna size and antenna processing. The type antenna radiation pattern is perpendicular to antenna surface, is attached at target object tapered outer surface while therefore use; In the time that the length of object changes thereupon, require antenna also to change thereupon, its gain also changes thereupon, therefore needs to design a antenna that can change according to length, and in addition, its every antenna performance also needs to meet the demands.
Summary of the invention
The object of the invention is to overcome above-described shortcoming, a kind of RFID label antenna is provided.
For achieving the above object, concrete scheme of the present invention is as follows: a kind of RFID label antenna, includes the first antenna and the second antenna, the scalable adjusting of distance between described the first antenna and the second antenna.
The first antenna includes strip the first noumenon, one end of described the first noumenon is provided with the first gain bar, the free end of described the first gain bar is provided with the first gain antenna of an arc, also include two coupling slots, described two coupling slot openings are towards the other end of the first noumenon, described two coupling slots are set in parallel in the first noumenon, and the both sides up and down of described each coupling slot are equipped with jagged serrated slot; Described the second antenna include one second body, the length of described the first noumenon is greater than the second body, one end of described the second body is provided with the second gain bar, the free end of the second gain bar is provided with the second gain antenna of an arc, also include two coupling bars that coordinate with coupling slot of being located at the second body other end, described two coupling bars be arranged in parallel, the both sides up and down of described each coupling bar are equipped with the jagged serrate projections coordinating with serrated slot, when cooperation, described serrate projections is positioned at serrated slot;
Also include T font adjusting rod, be provided with the adjusting recess of an opening towards the first noumenon in described the second body, the horizontal segment of described T font adjusting rod is positioned at and regulates recess;
If the distance of the coupling free end of bar and the interior the inside of coupling slot is L, the free end of establishing the horizontal segment of T font adjusting rod is M with the horizontal range of the interior the inside that regulates recess, described L=M*3.75.
Wherein, one end of described the first noumenon is arcwall face, and radian is identical with the radian of the first gain antenna.
Wherein, one end of described the second body is arcwall face, and radian is identical with the radian of the second gain antenna.
Wherein, described the first gain antenna is identical with the radian of the second gain antenna, is 60 °-80 °.
Wherein, a side of described the first gain antenna is also provided with the 3rd gain bar, and the free end of described the 3rd gain bar is provided with the 3rd gain antenna.
Wherein, the radian of described the 3rd gain bar is identical with the radian size of the first gain bar.
Wherein, the height of described the first noumenon is being less than 10cm.
Wherein, described the first antenna is provided with the isolation channel of strip,
Wherein, described the second antenna and the first antenna are provided with and increase breach frequently.
Beneficial effect of the present invention: 1, reading distance is long, its reading distance can reach 11-13m after tested. The reading distance of common RFID label antenna is all less than 10m. 2, can stretch; Be that length is adjustable, it is substantially certain that it can be used for width, but on the packaging kit of indefinite length, have great practical value. 3, every antenna performance is good, standing-wave ratio is little, return loss is low, it is high to gain and possess omni-directional. Its at hyperfrequency be (860-960MHz) when especially the frequency of about 925MHz is used performance higher.
Brief description of the drawings
Fig. 1 is schematic diagram of the present invention;
Fig. 2 is the schematic diagram after elongation of the present invention;
Fig. 3 is the first antenna schematic diagram of the present invention;
Fig. 4 is the second antenna schematic diagram of the present invention;
Fig. 5 is the schematic diagram that utilizes the RFID label that the present invention makes;
Fig. 6 is testing impedance datagram of the present invention;
Fig. 7 is return loss test data figure of the present invention;
Fig. 8 is directionality test data figure of the present invention;
Description of reference numerals in Fig. 1 to Fig. 8:
1-the first antenna; 11-coupling slot; 12-serrated slot; 13-first bar that gains; 14-the first gain antenna; 15-the 3rd gain bar; 16-the 3rd gain antenna; 17-isolation channel; 18-increases breach frequently;
2-the second antenna; The 21-bar that is coupled; 22-serrate projections; 23-second bar that gains; 24-the second gain antenna; 25-regulates recess;
3-T font adjusting rod;
4-dielectric-slab;
5-label chip;
6-substrate.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation, is not practical range of the present invention is confined to this.
As shown in Figures 1 to 8, a kind of RFID label antenna described in the present embodiment, includes the first antenna 1 and the second antenna 2, the scalable adjusting of distance between described the first antenna 1 and the second antenna 2. Utilize the RFID label of its making to comprise substrate 6, and be located at the RFID label antenna on substrate 6, described the second antenna 2 is provided with dielectric-slab 4, and dielectric-slab 4 is provided with label chip 5, and described label chip 5 is electrically connected with antenna.
A kind of RFID label antenna described in the present embodiment, the first antenna 1 includes strip the first noumenon, one end of described the first noumenon is provided with the first gain bar 13, the free end of described the first gain bar 13 is provided with the first gain antenna 14 of an arc, also include two coupling slots 11, described two coupling slot 11 openings are towards the other end of the first noumenon, and described two coupling slots 11 are set in parallel in the first noumenon, and the both sides up and down of described each coupling slot 11 are equipped with jagged serrated slot 12; Described the second antenna 2 include one second body, the length of described the first noumenon is greater than the second body, one end of described the second body is provided with the second gain bar 23, the free end of the second gain bar 23 is provided with the second gain antenna 24 of an arc, also include two coupling bars 21 that coordinate with coupling slot 11 of being located at the second body other end, described two coupling bars 21 be arranged in parallel, the both sides up and down of described each coupling bar 21 are equipped with the jagged serrate projections 22 coordinating with serrated slot 12, when cooperation, described serrate projections 22 is positioned at serrated slot 12; A kind of RFID label antenna described in the present embodiment, also includes T font adjusting rod 3, is provided with the adjusting recess 25 of an opening towards the first noumenon in described the second body, and the horizontal segment of described T font adjusting rod 3 is positioned at and regulates recess 25; A kind of RFID label antenna described in the present embodiment, the distance of establishing the coupling free end of bar 21 and the interior the inside of coupling slot 11 is L, the free end of establishing the horizontal segment of T font adjusting rod 3 is M with the horizontal range of the interior the inside that regulates recess 25, described L=M*3.75.
It is long that this programme has been realized reading distance by above-mentioned feature, and its reading distance can reach 11-13m after tested. The reading distance of common RFID label antenna is all less than 10m. In addition, it can stretch; Be that length is adjustable, it is substantially certain that it can be used for width, but on the packaging kit of indefinite length, have great use value, realizes note attached in Different Package, in addition, can increase without limitation in theory. Finally, its every antenna performance is good, standing-wave ratio is little, return loss is low, it is high to gain and possess omni-directional. ; When its frequency in 925MHz left and right is used, performance is higher. A kind of RFID label antenna described in the present embodiment, one end of described the first noumenon is arcwall face, and radian is identical with the radian of the first gain antenna 14. So arrange, further improved gain performance, and reduce return loss, increase radiation omni-directional, optimum results is better. A kind of RFID label antenna described in the present embodiment, one end of described the second body is arcwall face, and radian is identical with the radian of the second gain antenna 24. Radian is identical can reduce standing wave formation between two antennas, reduces wave interference, reduces standing-wave ratio. A kind of RFID label antenna described in the present embodiment, described the first gain antenna 14 is identical with the radian of the second gain antenna 24, is 60 °-80 °. By emulation and actual experiment, properties the best of this radian antenna.
A kind of RFID label antenna described in the present embodiment, a side of described the first gain antenna 14 is also provided with the 3rd gain bar 15, and the free end of described the 3rd gain bar 15 is provided with the 3rd gain antenna 16; A kind of RFID label antenna described in the present embodiment, the radian of described the 3rd gain bar 15 is identical with the radian size of the first gain bar 13; In like manner, so arrange, further improved gain performance, and reduce return loss, increase radiation omni-directional, optimum results is better.
A kind of RFID label antenna described in the present embodiment, the height of described the first noumenon is being less than 10cm. A kind of RFID label antenna described in the present embodiment, described the first antenna 1 is provided with the isolation channel 17 of strip, described isolation channel 17 is between two coupling slots 11, a kind of RFID label antenna described in the present embodiment, described the second antenna 2 is provided with and increases breach 18 frequently near the Liang Jiaochu of the one side of the second antenna 2 near two jiaos of places and first antenna 1 of the one side of the first antenna 1. Increase breach 18 frequently and can increase isolation, reduce standing wave and form, make standing-wave ratio approach 1. The antenna of this programme also has good performance aspect omni-directional, and as described in Figure 8, aspect omni-directional, its performance excellence, has 360 degree without the equidistant omni-directional in dead angle. As shown in Figure 7, its return loss performance is outstanding, especially reach-65dB of return loss minimum of a value in the time of 925MHz, all remain in the return loss of whole high band-below 10dB, level all exceedes other similar antenna levels.
Establish through surveying, it uses coverage all to reach 11-13m under different stretch length. Test result is as following table:
In addition, as shown in Figure 6, measured impedance is 11+144j ohm in the time of 925MHz in the input impedance of this antenna measurement, reaches conjugate impedance match with the impedance 11+143j of chip Monza4Dura. Label can reach optimal effectiveness in the time of 925MHz.
The above is only a preferred embodiment of the present invention, and the equivalence of doing according to structure, feature and principle described in patent claim of the present invention therefore all changes or modifies, and is included in the protection domain of patent application of the present invention.
Claims (7)
1. a RFID label antenna, is characterized in that: include the first antenna (1) and the second antenna (2), the scalable adjusting of distance between described the first antenna (1) and the second antenna (2);
Described the first antenna (1) is provided with the isolation channel (17) of strip;
Described the second antenna (2) is provided with and increases breach (18) frequently with the first antenna (1);
The first antenna (1) includes strip the first noumenon, one end of described the first noumenon is provided with the first gain bar (13), the free end of described the first gain bar (13) is provided with first gain antenna (14) of an arc, also include two coupling slots (11), described two coupling slots (11) opening is towards the other end of the first noumenon, described two coupling slots (11) are set in parallel in the first noumenon, and the both sides up and down of described each coupling slot (11) are equipped with jagged serrated slot (12), described the second antenna (2) includes one second body, the length of described the first noumenon is greater than the second body, one end of described the second body is provided with the second gain bar (23), the free end of the second gain bar (23) is provided with second gain antenna (24) of an arc, also include two coupling bars (21) that coordinate with coupling slot (11) of being located at the second body other end, described two coupling bars (21) be arranged in parallel, the both sides up and down of described each coupling bar (21) are equipped with the jagged serrate projections (22) coordinating with serrated slot (12), when cooperation, described serrate projections (22) is positioned at serrated slot (12),
Also include T font adjusting rod (3), be provided with the adjusting recess (25) of an opening towards the first noumenon in described the second body, the horizontal segment of described T font adjusting rod (3) is positioned at and regulates recess (25);
If the distance of the free end of coupling bar (21) and the interior the inside of coupling slot (11) is L, the free end of establishing the horizontal segment of T font adjusting rod (3) is M with the horizontal range of the interior the inside that regulates recess (25), described L=M*3.75.
2. a kind of RFID label antenna according to claim 1, it is characterized in that: one end of described the first noumenon is arcwall face, and radian is identical with the radian of the first gain antenna (14).
3. a kind of RFID label antenna according to claim 1, it is characterized in that: one end of described the second body is arcwall face, and radian is identical with the radian of the second gain antenna (24).
4. a kind of RFID label antenna according to claim 1, is characterized in that: described the first gain antenna (14) is identical with the radian of the second gain antenna (24), is 60 °-80 °.
5. a kind of RFID label antenna according to claim 1, is characterized in that: a side of described the first gain antenna (14) is also provided with the 3rd gain bar (15), and the free end of described the 3rd gain bar (15) is provided with the 3rd gain antenna (16).
6. a kind of RFID label antenna according to claim 5, is characterized in that: the radian of described the 3rd gain bar (15) is identical with the radian size of the first gain bar (13).
7. a kind of RFID label antenna according to claim 1, is characterized in that: the height of described the first noumenon is being less than 10cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510315556.4A CN104993223B (en) | 2015-06-11 | 2015-06-11 | Rfid label antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510315556.4A CN104993223B (en) | 2015-06-11 | 2015-06-11 | Rfid label antenna |
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| CN104993223A CN104993223A (en) | 2015-10-21 |
| CN104993223B true CN104993223B (en) | 2016-05-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104866894A (en) * | 2015-06-11 | 2015-08-26 | 江健良 | Coupling capacitance RFID label provided with isolation groove |
| CN104916906A (en) * | 2015-06-11 | 2015-09-16 | 江健良 | Insertion coupling capacitor RFID tag antenna |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204793164U (en) * | 2015-06-11 | 2015-11-18 | 邝嘉豪 | RFID tag antenna |
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| US20090085750A1 (en) * | 2007-09-27 | 2009-04-02 | 3M Innovative Properties Company | Extended RFID tag |
| US9767405B2 (en) * | 2011-09-08 | 2017-09-19 | Avery Dennison Retail Information Services, Llc | RFID device with elongated structure |
| CN202948467U (en) * | 2012-05-10 | 2013-05-22 | 刘健 | Radio-frequency identification label with frequency tunability |
| CN103855474B (en) * | 2012-12-03 | 2016-12-21 | 鸿富锦精密工业（深圳）有限公司 | Antenna |
| CN103116803B (en) * | 2013-01-29 | 2015-12-02 | 华中科技大学 | Based on the RFID of fractal spring structure, radio-frequency antenna and preparation method |
| CN204205045U (en) * | 2014-09-12 | 2015-03-11 | 晶彩科技股份有限公司 | The structure of slot antenna |
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| CN204793164U (en) * | 2015-06-11 | 2015-11-18 | 邝嘉豪 | RFID tag antenna |
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Inventor after: Zhu Hongyang Inventor after: Yao Aiqin Inventor before: Jiang Jianliang |
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Effective date of registration: 20160408 Address after: 030008 Shanxi Province, Taiyuan city Xueyuan Road District No. three pointed Applicant after: Zhu Hongyang Address before: 523000 Guangdong Province, Dongguan Songshan Lake University Road No. 1 Applicant before: Jiang Jianliang |
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Effective date of registration: 20180206 Address after: Room 3, room 3, room 4301 and 4302, No. 4, No. 32, South Bay North Road, Xiangzhou District, Xiangzhou, Guangdong Patentee after: Zhuhai Global Times Technology Co., Ltd. Address before: 030008 Shanxi Province, Taiyuan city Xueyuan Road District No. three pointed Patentee before: Zhu Hongyang |
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