CN105514599A - Ultrahigh frequency electronic tag antenna - Google Patents
Ultrahigh frequency electronic tag antenna Download PDFInfo
- Publication number
- CN105514599A CN105514599A CN201610055648.8A CN201610055648A CN105514599A CN 105514599 A CN105514599 A CN 105514599A CN 201610055648 A CN201610055648 A CN 201610055648A CN 105514599 A CN105514599 A CN 105514599A
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- antenna
- electronic tag
- ultrahigh frequency
- frequency electronic
- tag antenna
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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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Details Of Aerials (AREA)
Abstract
The invention discloses an ultrahigh frequency electronic tag antenna, which belongs to the production technology field of electronic tags, and comprises a medium base plate and an ultrahigh frequency electronic tag antenna which is loaded on the surface of the medium base plate, radiating antennas are further symmetrically arranged on the surface of the medium base plate, and comprise bending structures and loading wires, and the bending structures are formed by alternately connecting wide wires and narrow wires. The ultrahigh frequency electronic tag antenna further comprises T-type matching structures which are symmetrically arranged, the T-type matching structures are embedded into the radiating antennas which are symmetrically arranged, and are used to feed for the radiating antennas, feed ports are arranged on openings of the T-type matching structures which are symmetrically arranged, electronic tag chips are welded on the feed ports, and the radiating antennas and the T-type matching structures are bonded on the medium base plate through a curable adhesion film. The ultrahigh frequency electronic tag antenna is simple in structure, cheap in price, excellent in gain effect and easy to match with chips.
Description
Technical field
The invention belongs to technical field of RFID, belong to electronic tag manufacture technology field, be specifically related to a kind of ultrahigh frequency electronic tag antenna.
Background technology
Rfid system is a kind of contactless automatic recognition system, and it identifies destination object automatically by rf wireless signal, and obtains related data.According to the wave frequency that rfid system uses, RFID can be divided into low frequency, high frequency and hyperfrequency.Super high frequency radio frequency identification (UHFRFID) technology has that decipherment distance is far away, recognition accuracy is high, recognition speed is fast, antijamming capability is strong, long service life, can penetrate nonmetallic materials and the feature such as operation strategies is wide.It is that the identity that can be widely used in the aspects such as personnel, animal, article identifies automatically in order to realize digitlization, informationization and carry out automatically gathering the brand-new management means of one released to the characteristic such as attribute, state, numbering of object.Thus the development of UHFRFID system is the emphasis of current rfid system development.
UHFRFID system can be different because applying its composition different, but be substantially all made up of these three parts of electronic tag, read write line and application system, and wherein electronic tag is generally made up of label antenna and label chip.Label antenna is very important to UHFRFID system, is the critical component determining UHFRFID systematic function.Therefore, designing the suitable antenna type that impedance can be mated with chip, is the target of research and designing antenna person.In addition, in order to ensure the maximum power transfer between antenna and chip, good impedance matching must must be guaranteed.Also should meet that size is little, structure is simple, cost is low and be easy to combine with other objects simultaneously.
At present, tag antenna design is mainly for miniaturized and impedance matching, and the type of some of them label antenna, as bent dipole, folded dipole, helical antenna etc.These label antennas are all class dipole antennas.Although structure is different, their performance is similar to dipole antenna.Usually, the method for amendment dipole structure is often used to the size reducing antenna, and usual not too large degree affects the performance of antenna.But the usual bandwidth of these label antennas is not wide, and a region of hyperfrequency can only be covered.In addition, their size is not enough little.
Summary of the invention
In view of this, the present invention in order to overcome exist in miniaturized label antenna complex structure, cost is higher, gain is less, not easily with the shortcoming such as chip mates, a kind of ultrahigh frequency electronic tag antenna based on folding line symmetrical structure is provided, and adopts T-shaped matching network to carry out feed to antenna.The present invention effectively can increase antenna feed impedance by adopting the antenna of symmetrical structure, improves antenna radiation efficiency; Simultaneously by folding line, reduce the size of antenna on the one hand; Can adjust input impedance on the other hand, make it mate with label chip.Select symmetrical bending dipole effectively can produce omni-directional pattern in the present invention, T-shaped matching structure then can adjust input impedance neatly and make label chip in wider bandwidth, realize the conjugate impedance match of impedance, and its method also can widen the beamwidth of antenna simultaneously.
The present invention is solved the problem by following technological means:
A kind of ultrahigh frequency electronic tag antenna, comprises medium substrate and the ultrahigh frequency electronic tag antenna loading on medium substrate surface, and described medium substrate surface is also provided with symmetrical radiating antenna, and described radiating antenna comprises bending structure and loaded line;
Described bending structure is formed by connecting by wide line, narrow line interval;
Also comprise symmetrically arranged T-shaped matching structure, described T-shaped matching structure embeds in described symmetrically arranged radiating antenna, and described T-shaped matching structure is used for carrying out feed to radiating antenna, and described symmetrically arranged T-shaped matching structure opening part is provided with feed port;
Described ultrahigh frequency electronic tag antenna is by transmission line or waveguide signal, the junction of described ultrahigh frequency electronic tag antenna and transmission line or waveguide is plane port, described plane port is described T-shaped matching structure opening part, and described plane port is feed port;
Described feed port is welded with electronic label chip;
Described radiating antenna and T-shaped matching structure are pasted onto on medium substrate by curable adhesion membrane.
Further, described medium substrate is rectangle, and comprise two positive and negatives be oppositely arranged, described electronic label antenna is arranged on the front of described medium substrate.
Further, described medium substrate is epoxy resin fiberglass substrate, its relative atmospheric dielectric constant 4.4 ~ 4.6, thickness 1.6mm, and dielectric loss angle tangent is 0.02.
Further, the radio circuit that described electronic label antenna and electronic label chip form, its resonance frequency is 925MHz.
Further, described radiating antenna is copper conductive metallic material, and thickness is 0.035mm.
Further, described antenna current feed port is located at the opening part of T-shaped matching structure symmetrical short-circuit line.
Further, the mode that described feed port 3 encourages is lump port energisation mode.
Beneficial effect of the present invention is as follows:
1, the invention provides a kind of based on width bending lines separately and the label antenna of symmetrical structure, and adopt T-shaped matching network to carry out feed to antenna, overcome exist in miniaturized label antenna complex structure, cost is higher, gain is less, not easily with the shortcoming such as chip mates.
2, in the present invention by being provided with the symmetrical expression radiating antenna of width bending lines separately and loaded line composition, reduce the size of antenna on the one hand; Can adjust input impedance on the other hand, make it mate with label chip.
3, symmetrical bending dipole is selected effectively can to produce omni-directional pattern in the present invention, T-shaped matching structure then can adjust input impedance neatly and make label chip in wider bandwidth, realize the conjugate impedance match of impedance, and its method also can widen the beamwidth of antenna simultaneously.
4, the size by changing T-shaped coupling in the present invention can regulate mating between antenna with label chip easily, the impedance of this antenna, the particularly imaginary part of input impedance, held stationary in uhf band, to obtain and chip impedance good mating in wider frequency section, thus expand the bandwidth of antenna, achieve the target of UHFRFID frequency range covering the whole world and the many standards of compatibility.
Accompanying drawing explanation
Fig. 1 is the structural representation of the ultrahigh frequency electronic tag antenna that the present invention proposes;
In figure: 1, electronic label antenna; 2, medium substrate; 3, feed port; 4, T-shaped matching structure; 5, radiating antenna.
Embodiment
In describing the invention, it will be appreciated that, orientation or the position relationship of the instruction such as term " " center ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", " outward " they be based on orientation shown in the drawings or position relationship; be only the present invention for convenience of description and simplified characterization; instead of instruction or imply the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
Term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, except as otherwise noted, the implication of " multiple " is two or more.
Below with reference to accompanying drawing, the present invention is described in detail, as shown in Figure 1: a kind of ultrahigh frequency electronic tag antenna described in the present embodiment, comprise medium substrate 1 and the electronic label antenna 2 loading on medium substrate 1 surface, described medium substrate 1 surface is also provided with symmetrical radiating antenna 5, described radiating antenna 5 comprises bending structure and loaded line, and described bending structure is formed by connecting by wide line, narrow line interval; In the present invention, the width of described wide line is wider than the width of narrow line, and concrete different widths is how many, can adjust according to actual conditions and user's request.Particularly, bending structure can be shown in accompanying drawing 1, the bending structure connected and composed by vertical line, horizontal line interval, also can be oblique line, straight line, curve be formed by connecting at equal intervals or continuously, be not limited to the bending structure shown in the drawings of the present embodiment.
The bending structure that radiating antenna 5 adopts wide line, narrow line interval is formed by connecting and loaded line, as radiant body, when have alternating current by time, just can there is electromagnetic radiation.When frequency is low, the radiation of antenna is fainter; Frequency is higher, and the ability of aerial radiation is larger.In the structure of this antenna, Electric and magnetic fields is distributed in the same space, and the two energy can be made directly to transform, and electromagnetic energy can distally radiation.
Also comprise symmetrically arranged T-shaped matching structure 4, described T-shaped matching structure 4 embeds in described symmetrically arranged radiating antenna 5, described T-shaped matching structure 4 is for carrying out feed to radiating antenna 5, and described symmetrically arranged T-shaped matching structure circuit 4 opening part is provided with feed port 3;
When regulate described T-shaped matching structure 4 body vertical width, body horizontal width and body vertical direction and horizontal direction and horizontal direction end points distance time, can adjust input impedance, thus mate, there is very large flexibility.Along with the increase of the numerical value of the distance of body vertical width, body horizontal width and body vertical direction and horizontal direction and horizontal direction end points, the imaginary part of input impedance and real part are in increase tendency, so can according to the value requirement of input impedance being regulated qualitatively to these parameters.The value simultaneously adjusting these parameters is also less on radiance impact.
Described ultrahigh frequency electronic tag antenna 2 is by transmission line or waveguide signal, described ultrahigh frequency electronic tag antenna 2 is plane port with the junction of transmission line or waveguide, in the present invention, described plane port is arranged on the inside of antenna model, namely described plane port is described T-shaped matching structure 4 opening part, and described plane port is feed port 3;
Described feed port 3 is welded with electronic label chip;
Described radiating antenna 5 is pasted onto on medium substrate 2 by curable adhesion membrane.
In further improvement of the present invention, described medium substrate 2 comprises two positive and negatives be oppositely arranged, and described electronic label antenna 1 is arranged on the front of described medium substrate 2.
In further improvement of the present invention, described medium substrate 2 is epoxy resin fiberglass substrate, its relative atmospheric dielectric constant 4.4 ~ 4.6, thickness 1.6mm, and dielectric loss angle tangent is 0.02.
In further improvement of the present invention, the radio circuit that described electronic label antenna 1 forms with electronic label chip, its resonance frequency is 925MHz.
In further improvement of the present invention, described radiating antenna 5 is copper conductive metallic material, and thickness is 0.035mm.Owing to the requirement of antenna structure conductor part being all generally selection good conductor, therefore the employing of radiating antenna 5 described in the present invention has the copper of unique electric conductivity.
In further improvement of the present invention, the position of described antenna current feed port 3 is selected in the opening part of T-shaped matching structure 4 symmetrical short-circuit line, can realize impedance conjugate impedance match by adding T-shaped matching structure 4 near antenna feed point.
In further improvement of the present invention, the mode that described feed port 3 encourages is lump port energisation mode.
A specific embodiment of the present invention is as follows:
In the present invention, the working frequency range scope of electronic label antenna 1 is used in uhf band, described uhf band is ultra-high frequency wireless wave frequency ranges, current China ultrahigh frequency electronic tag work covering frequence scope is 860MHz ~ 960MHz, and the resonance frequency arranging electronic label antenna 1 of the present invention is 925MHz.Design dipole antenna when centre frequency 925MHz, its aerial signal reflection coefficient of port loss (S
11) in optimizing process, reach minimum value, illustrate that impedance matching is good, therefore, in the present embodiment, resonance frequency is 925MHz.
A kind of ultrahigh frequency electronic tag antenna, comprise medium substrate 2 and the electronic label antenna 1 loading on medium substrate 2 surface, described medium substrate 2 comprises two positive and negatives be oppositely arranged, and described electronic label antenna 1 is arranged on the front of described medium substrate 2; Described medium substrate 2 is epoxy resin fiberglass substrate, its relative atmospheric dielectric constant 4.4 ~ 4.6, thickness 1.6mm, and dielectric loss angle tangent is 0.02.Described electronic label antenna 1, the material of main part arranging antenna is semi-conducting material.Usually be all use good conductor at the conductor part of actual antennas structure, as metallic copper, copper has unique electric conductivity.Therefore, this label antenna selects copper conductive metallic material, and thickness is 0.035mm, and is pasted onto on described medium substrate by curable adhesion membrane.
Described medium substrate 2 is also symmetrically arranged with radiating antenna 5, and described radiating antenna 5 comprises bending structure and loaded line, and described bending structure is formed by connecting by wide line, narrow line interval; In practical operation, wide line width only needs larger than narrow line-width, and greatly how much concrete width can adjust according to actual conditions.Described radiating antenna 5 as radiant body, when have alternating current by time, just can there is electromagnetic radiation.When frequency is low, the radiation of antenna is fainter; Frequency is higher, and the ability of aerial radiation is larger.In structure of the present invention, Electric and magnetic fields is distributed in the same space, and the two energy can be made directly to transform, and electromagnetic energy can distally radiation.
Described symmetrically arranged radiating antenna 5 is connected with symmetrically arranged T-shaped matching structure 4, and described T-shaped matching structure 4 is for carrying out feed to radiating antenna 5; By regulating the width of the length and width in T-shaped matching structure 4 and T-shaped body can adjust input impedance, thus mate, there is very large flexibility.Along with the increase of the value of the width of the length and width in T-shaped matching structure 4 and T-shaped body, the imaginary part of input impedance and real part are in increase tendency, so can according to the value requirement of input impedance being regulated qualitatively to these parameters.The value simultaneously adjusting these parameters is also less on radiance impact.Described symmetrically arranged T-shaped matching structure 4 opening part is provided with feed port 3, and the mode that described feed port 3 encourages is lump port energisation mode; Described feed port 3 is welded with electronic label chip.
In the present invention, consider impedance transformation and mate factor, described radiating antenna 5 adopts symmetrically arranged wide line, bending structure that narrow line interval is formed by connecting and loaded line form.In radiating antenna 5, the lines at wide line, narrow line interval have contrary current potential in the electric current of bending continuously, can provide the reactance of capacitive and perception, they are cancelled out each other, and cause resonance frequency to reduce simultaneously, thus effectively can reduce antenna size, thus realize the miniaturization of label antenna.Meanwhile, also can be adjusted accordingly input impedance by the width changing bending number and folding line, make it mate with label chip.Wherein the loaded line of radiating antenna 5 also can produce electric capacity and inductance, and these electric capacity and the input impedance of inductance on antenna have conclusive impact.
The present invention adopts simple folding line dipole-type structure and T matching network structure to design, and the size after optimization reduces greatly, and antenna has, and gain is large, structure is simple, cost is low and chip impedance mates the advantages such as better.In a word, this label antenna has certain theory and practical application meaning for ultrahigh frequency RFID system.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (7)
1. a ultrahigh frequency electronic tag antenna, comprise medium substrate and the ultrahigh frequency electronic tag antenna loading on medium substrate surface, it is characterized in that: described medium substrate surface is also provided with symmetrical radiating antenna, and described radiating antenna comprises bending structure and loaded line;
Described bending structure is formed by connecting by wide line, narrow line interval;
Also comprise symmetrically arranged T-shaped matching structure, described T-shaped matching structure embeds in described symmetrically arranged radiating antenna, and described T-shaped matching structure is used for carrying out feed to radiating antenna, and described symmetrically arranged T-shaped matching structure opening part is provided with feed port;
Described ultrahigh frequency electronic tag antenna is by transmission line or waveguide signal, the junction of described ultrahigh frequency electronic tag antenna and transmission line or waveguide is plane port, described plane port is described T-shaped matching structure opening part, and described plane port is feed port;
Described feed port is welded with electronic label chip;
Described radiating antenna and T-shaped matching structure are pasted onto on medium substrate by curable adhesion membrane.
2. a kind of ultrahigh frequency electronic tag antenna according to claim 1, is characterized in that: described medium substrate is rectangle, comprise two positive and negatives be oppositely arranged, described electronic label antenna is arranged on the front of described medium substrate.
3. a kind of ultrahigh frequency electronic tag antenna according to claim 1, is characterized in that: described medium substrate is epoxy resin fiberglass substrate, its relative atmospheric dielectric constant 4.4 ~ 4.6, thickness 1.6mm, and dielectric loss angle tangent is 0.02.
4. a kind of ultrahigh frequency electronic tag antenna according to claim 1, is characterized in that: the radio circuit that described electronic label antenna and electronic label chip form, and its resonance frequency is 925MHz.
5. a kind of ultrahigh frequency electronic tag antenna according to claim 1, is characterized in that: described radiating antenna is copper conductive metallic material, and thickness is 0.035mm.
6. a kind of ultrahigh frequency electronic tag antenna according to claim 1, is characterized in that: described antenna current feed port is located at the opening part of T-shaped matching structure symmetrical short-circuit line.
7. a kind of ultrahigh frequency electronic tag antenna according to claim 1, is characterized in that: the energisation mode of described feed port is the excitation of lump port.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610055648.8A CN105514599A (en) | 2016-01-27 | 2016-01-27 | Ultrahigh frequency electronic tag antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610055648.8A CN105514599A (en) | 2016-01-27 | 2016-01-27 | Ultrahigh frequency electronic tag antenna |
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| CN105514599A true CN105514599A (en) | 2016-04-20 |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106022436A (en) * | 2016-05-12 | 2016-10-12 | 安徽晶太信息科技有限公司 | Butterfly transponder and production method thereof |
| CN106602284A (en) * | 2016-11-30 | 2017-04-26 | 南京邮电大学 | Small-scale metal-resistant broadband tag antenna |
| CN107230820A (en) * | 2017-07-19 | 2017-10-03 | 珠海晶通科技有限公司 | A kind of ultra-high frequency RFID label antenna of T-shaped matching impedance structure |
| CN107799871A (en) * | 2016-09-02 | 2018-03-13 | 半导体元件工业有限责任公司 | Radio frequency identification (RFID) labels device |
| CN108064115A (en) * | 2016-11-08 | 2018-05-22 | 韩国科学技术院 | Printed circuit board and manufacturing methods with antenna and electromagnetism tunnel embedding structure |
| CN108256368A (en) * | 2016-12-28 | 2018-07-06 | 航天信息股份有限公司 | The generation method and device of two-port network |
| CN108767448A (en) * | 2018-06-08 | 2018-11-06 | 河南师范大学 | A kind of small size double frequency list feedback omnidirectional antenna |
| CN108879092A (en) * | 2018-06-08 | 2018-11-23 | 河南师范大学 | A kind of novel small size omnidirectional antenna |
| CN109272096A (en) * | 2018-11-28 | 2019-01-25 | 深圳华云数码有限公司 | A kind of antenna and electronic tag |
| CN109409484A (en) * | 2018-10-19 | 2019-03-01 | 威海北洋光电信息技术股份公司 | Double-round switchable layer Patcho antenna device based on RFID |
| CN110137678A (en) * | 2019-04-18 | 2019-08-16 | 宁波大学 | A kind of voltage-multiplying type radio frequency RECTIFYING ANTENNA |
| CN112151935A (en) * | 2019-06-27 | 2020-12-29 | 亘冠智能技术（杭州）有限公司 | Liquid insensitive ultrahigh frequency RFID flexible tag antenna |
| CN112949808A (en) * | 2021-03-04 | 2021-06-11 | 江苏科睿坦电子科技有限公司 | Tag antenna and tag |
| CN113285206A (en) * | 2021-05-26 | 2021-08-20 | 湖南工程学院 | Miniaturized omnidirectional UHF-RFID (ultra high frequency-radio frequency identification) tag antenna and preparation method thereof |
| CN114861850A (en) * | 2022-07-05 | 2022-08-05 | 南京隼眼电子科技有限公司 | Electronic label |
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| CN1716693A (en) * | 2004-07-02 | 2006-01-04 | 深圳市华阳微电子有限公司 | Method for producing superhigh frequency electronic label antenna and electronic label and antenna |
| CN101090175A (en) * | 2007-07-18 | 2007-12-19 | 北京邮电大学 | Superhigh frequency RFID universal label antenna of capacitor and inductance coupled |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106022436A (en) * | 2016-05-12 | 2016-10-12 | 安徽晶太信息科技有限公司 | Butterfly transponder and production method thereof |
| CN107799871A (en) * | 2016-09-02 | 2018-03-13 | 半导体元件工业有限责任公司 | Radio frequency identification (RFID) labels device |
| CN108064115A (en) * | 2016-11-08 | 2018-05-22 | 韩国科学技术院 | Printed circuit board and manufacturing methods with antenna and electromagnetism tunnel embedding structure |
| CN106602284A (en) * | 2016-11-30 | 2017-04-26 | 南京邮电大学 | Small-scale metal-resistant broadband tag antenna |
| CN108256368A (en) * | 2016-12-28 | 2018-07-06 | 航天信息股份有限公司 | The generation method and device of two-port network |
| CN107230820A (en) * | 2017-07-19 | 2017-10-03 | 珠海晶通科技有限公司 | A kind of ultra-high frequency RFID label antenna of T-shaped matching impedance structure |
| CN108767448A (en) * | 2018-06-08 | 2018-11-06 | 河南师范大学 | A kind of small size double frequency list feedback omnidirectional antenna |
| CN108879092A (en) * | 2018-06-08 | 2018-11-23 | 河南师范大学 | A kind of novel small size omnidirectional antenna |
| CN109409484A (en) * | 2018-10-19 | 2019-03-01 | 威海北洋光电信息技术股份公司 | Double-round switchable layer Patcho antenna device based on RFID |
| CN109272096A (en) * | 2018-11-28 | 2019-01-25 | 深圳华云数码有限公司 | A kind of antenna and electronic tag |
| CN110137678A (en) * | 2019-04-18 | 2019-08-16 | 宁波大学 | A kind of voltage-multiplying type radio frequency RECTIFYING ANTENNA |
| CN112151935A (en) * | 2019-06-27 | 2020-12-29 | 亘冠智能技术（杭州）有限公司 | Liquid insensitive ultrahigh frequency RFID flexible tag antenna |
| CN112949808A (en) * | 2021-03-04 | 2021-06-11 | 江苏科睿坦电子科技有限公司 | Tag antenna and tag |
| CN112949808B (en) * | 2021-03-04 | 2022-10-11 | 江苏科睿坦电子科技有限公司 | Tag antenna and tag |
| CN113285206A (en) * | 2021-05-26 | 2021-08-20 | 湖南工程学院 | Miniaturized omnidirectional UHF-RFID (ultra high frequency-radio frequency identification) tag antenna and preparation method thereof |
| CN113285206B (en) * | 2021-05-26 | 2022-06-07 | 湖南工程学院 | Miniaturized omnidirectional UHF-RFID (ultra high frequency-radio frequency identification) tag antenna and preparation method thereof |
| CN114861850A (en) * | 2022-07-05 | 2022-08-05 | 南京隼眼电子科技有限公司 | Electronic label |
| CN114861850B (en) * | 2022-07-05 | 2022-09-02 | 南京隼眼电子科技有限公司 | Electronic label |
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