CN105529520B - Ultra wide band circular polarisation anti-metal is easy to the RFID label antenna of impedance adjusting - Google Patents
Ultra wide band circular polarisation anti-metal is easy to the RFID label antenna of impedance adjusting Download PDFInfo
- Publication number
- CN105529520B CN105529520B CN201610064020.4A CN201610064020A CN105529520B CN 105529520 B CN105529520 B CN 105529520B CN 201610064020 A CN201610064020 A CN 201610064020A CN 105529520 B CN105529520 B CN 105529520B
- Authority
- CN
- China
- Prior art keywords
- metal
- patch
- radiation patch
- semi
- easy
- 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.)
- Expired - Fee Related
Links
- 239000002184 metal Substances 0.000 title claims abstract description 62
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 62
- 230000005855 radiation Effects 0.000 claims abstract description 46
- 239000000758 substrate Substances 0.000 claims abstract description 26
- 230000010287 polarization Effects 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 4
- 230000006854 communication Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- H01Q1/2216—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 used in interrogator/reader equipment
-
- 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
-
- 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
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
- H01Q13/085—Slot-line radiating ends
Landscapes
- Waveguide Aerials (AREA)
Abstract
The invention discloses the RFID label antenna that a kind of ultra wide band circular polarisation anti-metal is easy to impedance adjusting, including radiation patch, medium substrate, grounded metal patch and label chip, the radiation patch is arranged on the upper surface of medium substrate, and the grounded metal patch is arranged on the lower surface of medium substrate；The top of the radiation patch is provided with a semi-circular groove, and the semi-circular groove is internally embedded a semi-circular shape microstrip feed line and a rectangular microstrip feeder line being connected with semi-circular shape microstrip feed line, and the label chip is welded on semi-circular shape microstrip feed line；A L-shaped groove is provided with the middle part of the radiation patch, the lower part of radiation patch sets the short-circuit via of a connection radiation patch upper strata and grounded metal patch lower floor.The label antenna of the present invention covers worldwide ultrahigh frequency RFID application bands, and 3dB axial ratio bandwidths are wider, and stable performance can be kept in more complex environment.
Description
Technical field
The present invention relates to a kind of RFID label antenna, especially a kind of ultra wide band circular polarisation anti-metal is easy to impedance adjusting
RFID label antenna, belongs to RFID antenna technical field.
Background technology
Radio frequency identification (Radio Frequency Identification, RFID) technology, also known as radio frequency identification.It is
A kind of contactless automatic identification technology realized using electromagnetic wave.RFID system is made of reader, label and antenna.
In RFID system, electronic tag captures the radio frequency energy emitted from reader antenna by label antenna, and
For activating label chip work, the data message stored by chip is then being transmitted to by reader antenna by label antenna
Received.In whole radio frequency identification communication process, label antenna has highly important effect.
In fields such as retail business, logistics, super high frequency radio frequency identification (UHF-RFID) technology is applied more and more extensive.It is right
In frequency range used in ultrahigh frequency RFID, there are different frequency range approval standards, such as the 840MHz- that China uses in different countries
845MHz and 920MHz-925MHz, and the frequency range of North America is 902MHz-928MHz.Therefore, ultrahigh frequency RFID covering the whole world is designed
Had very important significance using the ultra wide band label antenna of frequency range (840MHz-960MHz).
In present market, most RFID system but works as label using the reader antenna of circular polarisation
Using linear polarization antenna when, very big polarization mismatch just occurs in communication process, thus greatly reducing reading away from
From.Even when reader antenna is also to use linear polarization, the position that the label antenna of linear polarization is placed is slightly mispositioned and will go out
Now complete polarization mismatch, so as to cannot communicate.
In many actual application environments, labeling requirement is adhered on the metal surface.Due to reflection of the metal to electromagnetic wave,
When label antenna is close to metal, change that the impedance matching of antenna, radiation efficiency, directionality all occur, the reading of label away from
From greatly reducing.Therefore the label antenna for designing an anti-metal be in the market there is an urgent need to.
The RFID label chip of present in the market application is all the property that the high capacitive reactance of Low ESR is presented, and to realize impedance
Match somebody with somebody, realize the transimission power of maximum, label antenna must be designed to the reactance of the high induction reactance of Low ESR.Since different label chips have
Different impedance values, therefore design is easy to the label antenna that impedance is adjusted and is highly desirable.
The content of the invention
The purpose of the present invention is to solve the defects of the above-mentioned prior art, there is provided a kind of ultra wide band circular polarisation anti-metal
Be easy to impedance adjusting RFID label antenna, the label antenna have ultra wide band, circular polarisation, anti-metal, be easy to impedance adjusting
Advantage, and worldwide ultrahigh frequency RFID application bands are covered, 3dB axial ratio bandwidths are wider.
The purpose of the present invention can be reached by adopting the following technical scheme that：
Ultra wide band circular polarisation anti-metal is easy to the RFID label antenna of impedance adjusting, including radiation patch, medium substrate, connects
Ground metal patch and label chip, the radiation patch are arranged on the upper surface of medium substrate, and the grounded metal patch is set
In the lower surface of medium substrate；The top of the radiation patch is provided with a semi-circular groove, and the semi-circular groove is internally embedded
One semi-circular shape microstrip feed line and a rectangular microstrip feeder line being connected with semi-circular shape microstrip feed line, the label chip weldering
It is connected on semi-circular shape microstrip feed line；A L-shaped groove is provided with the middle part of the radiation patch, the lower part of radiation patch sets one
Connect the short-circuit via of radiation patch upper strata and grounded metal patch lower floor.
As a preferred embodiment, the radiation patch, grounded metal patch and short-circuit via are made of copper product,
The medium substrate uses FR4 medium substrates.
As a preferred embodiment, the Monza4 of the model Impinj companies of the label chip, the label chip exist
The threshold power of input impedance and -17.4dBm when working frequency is 915MHz with 11-j143 Ω.
As a preferred embodiment, the size of the radiation patch is 58mm × 58mm.
As a preferred embodiment, the planar dimension of the medium substrate is identical with the size of grounded metal patch, is
68mm × 68mm, and the thickness of medium substrate is 1.6mm.
As a preferred embodiment, the radius of the semi-circular groove is 25mm.
As a preferred embodiment, the annulus outer radius of the semi-circular shape microstrip feed line is 22.36mm, and inside radius is
20.39mm；The length of the rectangular microstrip feeder line is 17.3mm, width 2.6mm.
As a preferred embodiment, the lower surface of the label chip for square microstrip feed line connecting line, the micro-strip
The length of feeder line connecting line is 2mm.
As a preferred embodiment, the big rectangle length of the L-shaped groove is 29.5mm, and small rectangle length is 7mm, big rectangle
Width with small rectangle is 3mm.
As a preferred embodiment, the distance between lower edge of the center of the short-circuit via and radiation patch is
4mm, radius 1mm.
The present invention has following beneficial effect relative to the prior art：
1st, label antenna of the invention is provided with a semi-circular groove on the top of radiation patch, and in the semi-circular groove
Portion is embedded in a semi-circular shape microstrip feed line and a rectangular microstrip feeder line, can be with by varying the length of rectangular microstrip feeder line
Adjust the impedance of label antenna, the label chip matches impedances for being allowed to and using；A L-shaped is provided with the middle part of radiation patch
Groove, more preferable circular polarization pattern can be inspired by L-shaped groove；One short-circuit via is set in the lower part of radiation patch, is passed through
Short-circuit via connection radiation patch upper strata and grounded metal patch lower floor, realize one using grounded metal patch as label antenna
Partial function, to achieve the purpose that anti-metal.
2nd, label antenna of the invention uses microstrip lines feeding classification, is made grounded metal patch by short-circuit via
For a part for label antenna, when working in metal surface, performance will not only have an impact, but also due to the increasing on metal ground
Conference produces the gain of bigger, adds reading distance on the contrary.
3rd, label antenna of the invention shows by test, -10dB return loss bandwidth ultrahigh frequency RFID system covering the whole world
Unite frequency range, the axial ratio bandwidth of 3dB also completely covers the 920MHz-925MHz frequency ranges of US bands and China, therefore can be
Stable performance is more kept in complex environment.
Brief description of the drawings
Fig. 1 is the label antenna overlooking structure figure of the present invention.
Fig. 2 is the label antenna side block diagram of the present invention.
Fig. 3 is the label antenna input reactance figure of the present invention.
Fig. 4 is the label antenna input resistance figure of the present invention.
Fig. 5 is the test chart of the label antenna reflection coefficient of power of the present invention.
Fig. 6 is the label antenna axial ratio bandwidth figure of the present invention.
Fig. 7 is that the label antenna of the present invention is placed in the gain diagram of different size of metal surface.
Wherein, 1- radiation patch, 2- medium substrates, 3- grounded metal patches, 4- label chips, 5- semi-circular grooves, 6- half
Circular ring shape microstrip feed line, 7- rectangular microstrip feeder lines, 8-L shape grooves, 9- short circuit vias.
Embodiment
With reference to embodiment and attached drawing, the present invention is described in further detail, but embodiments of the present invention are unlimited
In this.
Embodiment 1：
As depicted in figs. 1 and 2, the label antenna of the present embodiment includes radiation patch 1, medium substrate 2, grounded metal patch
3 and label chip 4, the radiation patch 1 be arranged on the upper surface of medium substrate 2, the grounded metal patch 3 is arranged on medium
The lower surface of substrate 2, i.e., radiation patch 1 exists in upper strata, medium substrate 2 in intermediate layer, grounded metal patch 3 as metal
Lower floor；
The top of the radiation patch 1 is provided with a semi-circular groove 5, and the semi-circular groove 5 is internally embedded a semicircle
Annular microstrip feed line 6 and a rectangular microstrip feeder line 7 being connected with semi-circular shape microstrip feed line 6, are presented by semi-circular shape micro-strip
Line 6 and rectangular microstrip feeder line 7 can carry out couple feed to radiation patch 1, can by varying the length of rectangular microstrip feeder line 7
To adjust the impedance of label antenna；
The label chip 4 is welded on semi-circular shape microstrip feed line 6, the model Impinj companies of the label chip 4
Monza4, the input impedance and -17.4dBm of the chip of the model when working frequency is 915MHz with 11-j143 Ω
Threshold power；
The middle part of the radiation patch 1 is provided with a L-shaped groove 8, and more preferable circular polarisation mould can be inspired by L-shaped groove 8
Formula, and the lower part of radiation patch 1 sets the short-circuit via 9 of connection 3 lower floor of 1 upper strata of radiation patch and grounded metal patch,
Grounded metal patch 3 is used as to a part for label antenna by short-circuit via 9, to achieve the purpose that anti-metal, when label day
When line works in metal surface, performance will not only have an impact, but also since the increase of grounded metal patch 3 can produce bigger
Gain, add reading distance on the contrary；
In the present embodiment, the radiation patch 1, grounded metal patch 3 and short-circuit via 9 are made of copper product,
The medium substrate 2 uses FR4 medium substrates；The size of the radiation patch 1 is 58mm × 58mm, the medium substrate 2
Planar dimension is identical with the size of grounded metal patch 3, is 68mm × 68mm, and the thickness of medium substrate 2 is 1.6mm；Institute
The radius for stating semi-circular groove 5 is 25mm, and the annulus outer radius of the semi-circular shape microstrip feed line 6 is 22.36mm, and inside radius is
20.39mm, the length of the rectangular microstrip feeder line 7 is 17.3mm, and width 2.6mm, the lower surface of the label chip 4 is just
Square microstrip feed line connecting line, the length of the microstrip feed line connecting line is 2mm；The big rectangle length of the L-shaped groove 8 is
29.5mm, small rectangle length are 7mm, and the width of big rectangle and small rectangle is 3mm；It is described short circuit via 9 center with
The distance between lower edge of radiation patch 1 is 4mm, radius 1mm.
Mainly controlled from the foregoing it can be that the impedance of label antenna is adjusted by the length of rectangular microstrip feeder line 7；Such as
Shown in Fig. 3 and Fig. 4, when the length increase of rectangular microstrip feeder line 7, the input reactance and resistance of label antenna increase；Also,
It is best with used 4 impedance matching of label chip when the length of rectangular microstrip feeder line 7 is 17.3mm.
The reflection coefficient of power test curve of the label antenna of the present embodiment as shown in figure 5, from the figure, it can be seen that-
10dB bandwidth ultrahigh frequency RFID system frequency band covering the whole world.
The label antenna axial ratio bandwidth curve of the present embodiment is as shown in fig. 6, from the figure, it can be seen that the axial ratio bandwidth of 3dB
Also the 920MHz-925MHz frequency ranges of US bands and China be completely covers.
The label antenna of the present embodiment is placed in the gain contrast of different size of metal surface as shown in fig. 7, with metal
The increase of area, the gain of label antenna tend towards stability also with increase when metallic area is more than 200mm × 200mm, it is seen that
The label antenna of the present embodiment is when metal surface works with farther reading distance.
In conclusion the label antenna of the present invention is provided with a semi-circular groove on the top of radiation patch, and in the semicircle
Shape groove is internally embedded a semi-circular shape microstrip feed line and a rectangular microstrip feeder line, by varying the length of rectangular microstrip feeder line
Degree, can adjust the impedance of label antenna, the label chip matches impedances for being allowed to and using；It is provided with the middle part of radiation patch
One L-shaped groove, more preferable circular polarization pattern can be inspired by L-shaped groove；One short-circuit mistake is set in the lower part of radiation patch
Hole, connects radiation patch upper strata and grounded metal patch lower floor by short-circuit via, realizes using grounded metal patch as label
The function of a part for antenna, to achieve the purpose that anti-metal.
The above, is only patent preferred embodiment of the present invention, but the protection domain of patent of the present invention is not limited to
This, any one skilled in the art is in the scope disclosed in patent of the present invention, the skill of patent according to the present invention
Art scheme and its inventive concept are subject to equivalent substitution or change, belong to the protection domain of patent of the present invention.
Claims (10)
1. ultra wide band circular polarisation anti-metal is easy to the RFID label antenna of impedance adjusting, it is characterised in that：Including radiation patch, it is situated between
Matter substrate, grounded metal patch and label chip, the radiation patch are arranged on the upper surface of medium substrate, the grounded metal
Patch is arranged on the lower surface of medium substrate；The top of the radiation patch is provided with a semi-circular groove, the semi-circular groove
A semi-circular shape microstrip feed line and a rectangular microstrip feeder line being connected with semi-circular shape microstrip feed line are internally embedded, by logical
The length for changing rectangular microstrip feeder line is crossed, to adjust the impedance of label antenna, the label chip is welded on semi-circular shape micro-strip
On feeder line；A L-shaped groove is provided with the middle part of the radiation patch, circular polarization pattern is inspired by L-shaped groove, under radiation patch
Portion sets the short-circuit via of a connection radiation patch upper strata and grounded metal patch lower floor, and radiation patch is connected by short-circuit via
Piece upper strata and grounded metal patch lower floor, realize the function using grounded metal patch as a part for label antenna, to reach
The purpose of anti-metal.
2. ultra wide band circular polarisation anti-metal according to claim 1 is easy to the RFID label antenna of impedance adjusting, its feature
It is：The radiation patch, grounded metal patch and short-circuit via are made of copper product, and the medium substrate uses FR4
Medium substrate.
3. ultra wide band circular polarisation anti-metal according to claim 1 is easy to the RFID label antenna of impedance adjusting, its feature
It is：The Monza4 of the model Impinj companies of the label chip, the label chip have when working frequency is 915MHz
There are the input impedance of 11-j143 Ω and the threshold power of -17.4dBm.
4. it is easy to the RFID tag day of impedance adjusting according to claim 1-3 any one of them ultra wide band circular polarisation anti-metal
Line, it is characterised in that：The size of the radiation patch is 58mm × 58mm.
5. it is easy to the RFID tag day of impedance adjusting according to claim 1-3 any one of them ultra wide band circular polarisation anti-metal
Line, it is characterised in that：The planar dimension of the medium substrate is identical with the size of grounded metal patch, is 68mm × 68mm,
And the thickness of medium substrate is 1.6mm.
6. it is easy to the RFID tag day of impedance adjusting according to claim 1-3 any one of them ultra wide band circular polarisation anti-metal
Line, it is characterised in that：The radius of the semi-circular groove is 25mm.
7. ultra wide band circular polarisation anti-metal according to claim 6 is easy to the RFID label antenna of impedance adjusting, its feature
It is：The annulus outer radius of the semi-circular shape microstrip feed line is 22.36mm, inside radius 20.39mm；The rectangular microstrip feedback
The length of line is 17.3mm, width 2.6mm.
8. ultra wide band circular polarisation anti-metal according to claim 7 is easy to the RFID label antenna of impedance adjusting, its feature
It is：The lower surface of the label chip is square microstrip feed line connecting line, and the length of the microstrip feed line connecting line is
2mm。
9. it is easy to the RFID tag day of impedance adjusting according to claim 1-3 any one of them ultra wide band circular polarisation anti-metal
Line, it is characterised in that：The big rectangle length of the L-shaped groove is 29.5mm, and small rectangle length is 7mm, big rectangle and small rectangle
Width is 3mm.
10. it is easy to the RFID tag day of impedance adjusting according to claim 1-3 any one of them ultra wide band circular polarisation anti-metal
Line, it is characterised in that：The distance between the center of the short circuit via and the lower edge of radiation patch are 4mm, and radius is
1mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610064020.4A CN105529520B (en) | 2016-01-29 | 2016-01-29 | Ultra wide band circular polarisation anti-metal is easy to the RFID label antenna of impedance adjusting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610064020.4A CN105529520B (en) | 2016-01-29 | 2016-01-29 | Ultra wide band circular polarisation anti-metal is easy to the RFID label antenna of impedance adjusting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105529520A CN105529520A (en) | 2016-04-27 |
| CN105529520B true CN105529520B (en) | 2018-04-20 |
Family
ID=55771602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610064020.4A Expired - Fee Related CN105529520B (en) | 2016-01-29 | 2016-01-29 | Ultra wide band circular polarisation anti-metal is easy to the RFID label antenna of impedance adjusting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105529520B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9665821B1 (en) * | 2016-12-19 | 2017-05-30 | Antennasys, Inc. | Long-range surface-insensitive passive RFID tag |
| CN108281773A (en) * | 2017-01-06 | 2018-07-13 | 重庆邮电大学 | A kind of customized circular polarisation anti-metal UHF RFID label antennas |
| CN106876866B (en) * | 2017-03-15 | 2023-09-29 | 浙江悦和科技有限公司 | Insulating plug with RFID tag |
| CN107104267A (en) * | 2017-04-18 | 2017-08-29 | 华南师范大学 | A kind of RFID paster antennas of embedded couple feed |
| CN107634333A (en) * | 2017-09-22 | 2018-01-26 | 北京邮电大学 | A UHF radio frequency identification anti-metal circular polarisation label antenna |
| CN109754054A (en) * | 2018-12-31 | 2019-05-14 | 上海仪电特镭宝信息科技有限公司 | A kind of high temperature resistant anti-metal electronic tag and packaging technology |
| CN109509960B (en) * | 2019-01-22 | 2023-09-22 | 公安部交通管理科学研究所 | Ultrahigh frequency RFID anti-metal tag antenna |
| CN110289479B (en) * | 2019-05-16 | 2020-10-30 | 宁波大学 | Ultrahigh frequency RFID tag antenna with reconfigurable directional diagram |
| CN111211399B (en) * | 2020-03-04 | 2021-10-26 | 电子科技大学 | Metal-resistant ultrahigh frequency electronic tag antenna conformal to petroleum pipe sleeve wall |
| CN115799827B (en) * | 2023-02-07 | 2023-05-05 | 广东工业大学 | Circularly polarized compact full duplex antenna and wireless communication device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008016327A1 (en) * | 2006-08-01 | 2008-02-07 | Agency For Science, Technology And Research | Antenna for near field and far field radio frequency identification |
| CN104319470A (en) * | 2014-10-16 | 2015-01-28 | 浙江大学 | Long-reading-distance RFID (Radio Frequency Identification) tag antenna easy for impedance matching |
| CN104868241A (en) * | 2015-05-19 | 2015-08-26 | 上海大学 | Miniature ultrahigh frequency anti-metal multipurpose RFID label antenna |
| CN204809386U (en) * | 2015-07-28 | 2015-11-25 | 湖南智龙物联网技术有限公司 | Work and add groove type of falling F directional aerial in semi -circle of WLAN double frequency -band |
| CN205488482U (en) * | 2016-01-29 | 2016-08-17 | 华南师范大学 | RFID tag antenna that easy impedance of anti metal of ultra wide band circular polarization was adjusted |
-
2016
- 2016-01-29 CN CN201610064020.4A patent/CN105529520B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008016327A1 (en) * | 2006-08-01 | 2008-02-07 | Agency For Science, Technology And Research | Antenna for near field and far field radio frequency identification |
| CN104319470A (en) * | 2014-10-16 | 2015-01-28 | 浙江大学 | Long-reading-distance RFID (Radio Frequency Identification) tag antenna easy for impedance matching |
| CN104868241A (en) * | 2015-05-19 | 2015-08-26 | 上海大学 | Miniature ultrahigh frequency anti-metal multipurpose RFID label antenna |
| CN204809386U (en) * | 2015-07-28 | 2015-11-25 | 湖南智龙物联网技术有限公司 | Work and add groove type of falling F directional aerial in semi -circle of WLAN double frequency -band |
| CN205488482U (en) * | 2016-01-29 | 2016-08-17 | 华南师范大学 | RFID tag antenna that easy impedance of anti metal of ultra wide band circular polarization was adjusted |
Non-Patent Citations (1)
| Title |
|---|
| A Slot Loaded Circularly Polarized Patch Antenna for UHF RFID Reader;Chow-Yen-Desmond Sim等;《IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION》;20121031;第60卷(第10期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105529520A (en) | 2016-04-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105529520B (en) | Ultra wide band circular polarisation anti-metal is easy to the RFID label antenna of impedance adjusting | |
| CN205488482U (en) | RFID tag antenna that easy impedance of anti metal of ultra wide band circular polarization was adjusted | |
| Son et al. | Design of RFID tag antennas using an inductively coupled feed | |
| CN101593866B (en) | Dielectric resonance UHF RFID label antenna provided with T-shaped matching network | |
| CN206349489U (en) | A kind of double-decker broadband UHF RFID anti-metal tag antennas | |
| CN207441958U (en) | A UHF radio frequency identification anti-metal tag antenna | |
| CN102437421A (en) | Anti-metal tag antenna applied in RFID (radio frequency identification device) system on UHF (ultra high frequency) band | |
| CN107104267A (en) | A kind of RFID paster antennas of embedded couple feed | |
| CN103515700B (en) | A kind of RFID antenna | |
| CN108321512A (en) | A kind of ultra wide band anti-metal UHF RFID label antennas with symmetrical structure | |
| JP2014533057A (en) | Antenna structure and RFID transponder system provided with antenna structure | |
| CN101517828A (en) | Antenna for an RFID transponder and RFID transponder | |
| CN105140632B (en) | A kind of bending Dipole RFID Tag Antenna inductively fed | |
| EP2323075B1 (en) | RFID tag antenna using double-open ends coupler structure | |
| WO2016127595A1 (en) | Radio frequency identification (rfid) tag antenna | |
| CN106961002B (en) | Planar two axial mode helical antenna suitable for RFID tag | |
| CN102509872A (en) | UHF (ultra high frequency) RFID (radio frequency identification device) electronic label antenna | |
| CN104347945A (en) | Broadband UHF (Ultra High Frequency) RFID (Radio Frequency Identification Device) electronic tag antenna and electronic tag | |
| KR100980779B1 (en) | Apparatus of Chip Antenna For Ultra-Wide-Band Applications | |
| CN208570901U (en) | A kind of compact wideband circular polarisation back cavity type RFID reader antenna | |
| CN103633429A (en) | High-orientation RFID tag antenna capable of being integrated in parcel express bill | |
| WO2018149247A1 (en) | Radio frequency identification (rfid) tag antenna and implementation method therefor | |
| CN108281773A (en) | A kind of customized circular polarisation anti-metal UHF RFID label antennas | |
| CN204558640U (en) | A kind of ultrahigh frequency broadband circular polarization RFID reader antenna | |
| Park et al. | Design of UHF radio frequency identification metal tag antenna using T‐shaped slot |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180420 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |