CN106169649A - A kind of Ultrathin high gain reading and writing device antenna battle array for rfid system - Google Patents
A kind of Ultrathin high gain reading and writing device antenna battle array for rfid system Download PDFInfo
- Publication number
- CN106169649A CN106169649A CN201610771594.5A CN201610771594A CN106169649A CN 106169649 A CN106169649 A CN 106169649A CN 201610771594 A CN201610771594 A CN 201610771594A CN 106169649 A CN106169649 A CN 106169649A
- Authority
- CN
- China
- Prior art keywords
- microstrip line
- antenna
- high gain
- writing device
- battle array
- 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.)
- Withdrawn
Links
Classifications
-
- 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
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
Abstract
The present invention is a kind of Ultrathin high gain reading and writing device antenna battle array for rfid system, it is characterised in that: antenna body is pcb board；Described pcb board includes antenna system, substrate and is attached to the substrate lower floor copper sheet paper tinsel as antenna ground plate；Described antenna system includes that interconnective feed line part, earth plate and several micro-strip paster antennas, described feed line part include power splitter and the microstrip line being attached thereto, and described microstrip line is connected two inputs of formation with micro-strip paster antenna；Described feed line circuit pack at least contains two-stage merit separation structure, the microstrip line being connected with first order merit separation structure is in bending distribution, and forming the microstrip line of said two input in afterbody merit separation structure is that the feed distribution of lengths of 90 ° of vertical distribution and microstrip line makes the phase contrast of two inputs be 90 °.The present invention uses rational feeding classification and patch form, realizes the related electric performance of antenna array further with the character of substrate, enhances disguise and the stability of antenna, and antenna thickness is greatly reduced simultaneously, it is achieved that Ultrathin high gain antenna array.
Description
Technical field
The present invention relates to RFID label antenna, particularly relate to a kind of Ultrathin high gain reading and writing device antenna for rfid system
Battle array.
Background technology
RFID (Radio Frequency Identification) REID, is that one utilizes radio frequency to lead to
Reliable existing non-contact automatic identification technology, it includes electronic tag, two major parts of read write line, with the label of coding
Contactless data transmission is carried out by antenna, to complete the automatic identification process of certain distance with read write line.As quick, real
Time, the new and high technology of accurate acquisition and process information and the basis of message standardization, by universally acknowledged for this century ten big
One of important technology.In order to quickly read the information on label in longer operating distance, the system of high band is just enjoying pass
Note, and RFID label antenna is part the most variable in rfid system, how to realize antenna by the thickness of reduction antenna
Miniaturization in signal gain and design, conformalization, low cost, low-loss actual requirement are all difficulties of the prior art
Point, so optimizing design RFID label antenna to occupy critical role in whole rfid system.
For solving the problem of above-mentioned existence, the present invention uses the feeding classification carrying out micro-electric wire bending to make antenna small-sized
Changing, use the patch form of circular patch to strengthen its radianting capacity, the character of last combined base realizes the increasing to antenna array
Benefit, enhances disguise and the stability of antenna on the whole, and antenna thickness is greatly reduced simultaneously, it is achieved that Ultrathin high gain sky
Linear array.
Summary of the invention
It is an object of the invention to overcome the shortcoming of prior art, it is provided that a kind of Ultrathin high gain for rfid system is read
Write device antenna array.
For solving high-gain that above-mentioned a kind of Ultrathin high gain reading and writing device antenna battle array for rfid system designs, small-sized
Change, low cost and low-loss technical problem.
Present invention employs techniques below measure:
A kind of Ultrathin high gain reading and writing device antenna battle array for rfid system, antenna body is pcb board；Described pcb board bag
Include antenna system, substrate and be attached to the substrate lower floor copper sheet paper tinsel as antenna ground plate；Described antenna system includes interconnecting mutually
Feed line part, earth plate and several micro-strip paster antennas connect, described feed line part includes power splitter and is attached thereto
Microstrip line, described microstrip line be connected with micro-strip paster antenna formation two inputs；Described feed line circuit pack at least contains
Having two-stage merit separation structure, the microstrip line being connected with first order merit separation structure is in bending distribution, shape in afterbody merit separation structure
The microstrip line becoming said two input is the phase place that the feed distribution of lengths of 90 ° of vertical distribution and microstrip line makes two inputs
Difference is 90 °.
As improving further, described feed line contains three grades of merit separation structures, and described antenna is defeated by a total port
Entering energy, described three grades of merit separation structures input energy eight equal parts the most at last.
As improving further, described power splitter is microstrip line power splitter, and described each power splitter is by point ends such as power
Point ports such as energy is halved by mouth, described each power are connected by the input of microstrip line with next stage power splitter.
As improving further, the vertical length defining every grade of described merit separation structure microstrip line is d, wherein d be 15mm～
25mm, the output microstrip line horizontal continuation total length defined in described first order merit separation structure is L1, wherein L1Length
For the half-wavelength of free space, the output microstrip line horizontal continuation total length defined in the power divider structure of the described second level is
L2, wherein L2The quarter-wave of a length of free space.
As improving further, the most curved after the microstrip line of the left output port of described power splitter is the most horizontal-extending
Folding forms the signal input of described circular patch left port, and the microstrip line level of the right output port of described power splitter extends to the right
After bend again level vertically upward and extend and then formed the signal input of described circular patch right output port to the left, adjust right output port the
The most horizontal-extending length makes the phase contrast of two inputs be 90 °.
As improving further, subsidiary isolation resistance in described each power splitter, its resistance value is 100 Europe.
As improving further, described substrate dielectric constant is 4.3, and loss tangent angle is 0.0035, and thickness is
3.05mm, material is copper.
As improving further: described micro-strip paster antenna is circular patch, and described circular patch is by the electric current of input
Being converted into electromagnetic wave, the radius of definition circular patch is r, and wherein r is in the range of 45mm～48mm, described circular patch Working mould
Formula is TM11 pattern.
As improving further, described microstrip line can be divided into the first microstrip line and the second microstrip line, described first microstrip line
Characteristic impedance be 50 Ω, the width defining described first microstrip line is w1, wherein w1In the range of 5.8mm～6.3mm；Described
The characteristic impedance of the second microstrip line is 70.71 Ω, wherein w2In the range of 2.8mm～3.4mm.Compared with prior art, originally
Invention has the advantage that
1, in feeding classification, microstrip line uses the mode of appropriateness bending downwards to make the feed section compact conformation of antenna, it is ensured that
Antenna integrally-built miniaturization.
2, its radiation characteristic of micro-strip paster antenna used depends on gap, therefore uses circular patch can improve radiation effect
Rate, increases bandwidth, can increase again radianting capacity simultaneously.
3, select substrate its there is higher dielectric constant, there is low-loss characteristic simultaneously, in this, as antenna
Make the guided wave signals wavelength reduction being and reach more than 50%.
Accompanying drawing explanation
Accompanying drawing 1 is the present invention overall schematic for the Ultrathin high gain reading and writing device antenna battle array of rfid system；
Accompanying drawing 2 is the present invention antenna schematic diagram for the Ultrathin high gain reading and writing device antenna battle array of rfid system；
Detailed description of the invention
With detailed description of the invention, the present invention is described in further detail below in conjunction with the accompanying drawings.
A kind of Ultrathin high gain reading and writing device antenna battle array for rfid system, antenna body is pcb board；Described pcb board bag
Include antenna system 10, substrate 20 and be attached to the substrate lower floor copper sheet paper tinsel 30 as antenna ground plate；Described antenna system 10 is wrapped
Including interconnective feed line part 12, earth plate 30 and several micro-strip paster antennas 11, described feed line part includes merit
Dividing device and the microstrip line 121 being attached thereto, described microstrip line 121 is connected two inputs of formation with micro-strip paster antenna 11；Institute
Stating feed line 12 and at least contain two-stage merit separation structure, the microstrip line being connected with first order merit separation structure is in bending distribution, finally
In one-level merit separation structure formed said two input microstrip line be 90 ° of vertical distribution and input microstrip line feed length divide
Cloth makes the phase contrast of two inputs be 90 °.
A kind of Ultrathin high gain reading and writing device antenna battle array for rfid system, including antenna 10, substrate 20 and earth plate
30, described antenna 10 and earth plate 30 are fixing with the upper and lower surface of substrate 20 to be connected, if described antenna 10 include feed line 12 with
Dry micro-strip paster antenna 11, described feed line 12 includes power splitter and the microstrip line 121 being attached thereto, described microstrip line 121
Two inputs of formation it are connected with micro-strip paster antenna 11；Described feed line 12 at least contains two-stage merit separation structure, first order merit
The microstrip line of separation structure, in bending distribution, forms the microstrip line 121 of said two input in 90 ° in afterbody merit separation structure
The distribution of distribution and microstrip line 121 makes the phase contrast of two inputs be 90 °.
Refer to Fig. 1 and Fig. 2, in embodiment, described feed line 12 is containing three grades of merit separation structures, and described antenna 10 passes through
One total port input energy, described three grades of merit separation structures input energy eight equal parts the most at last.Described power splitter is microstrip line merit
Dividing device, point ports such as energy is halved by described each power splitter by point ports such as power, described each power pass through micro-strip
Line 121 is connected with the input of next stage power splitter.Subsidiary isolation resistance, the resistance of described isolation resistance in described power splitter
Value is 100 Europe, and described power splitter is symmetrical.In embodiment, operating frequency is in the range of 902～928MHz, it is preferred that work
Working frequency selects 915MHz, when operating frequency is 915MHz, defines the vertical length of every grade of described merit separation structure microstrip line 121
For d, wherein d is 15mm～25mm, it is preferred that d is 20mm.Define the defeated of power splitter 41 in described first order merit separation structure 40
Going out microstrip line 121 horizontal continuation total length is L1, wherein L1For 160mm～165mm, it is preferred that L1For 164mm, its length
It is about 1/2nd of free space wavelength, defines the output microstrip line of power splitter 51 in described second level power divider structure 50
121 horizontal continuation total lengths are L2, wherein L2For 80mm～85mm, it is preferred that L2For 82mm, its length is about the most empty
Between wavelength 1/4th.Microstrip line 121 part in described first order merit separation structure 40 bends to input direction, and described the
Microstrip line 121 part in two grades of merit separation structures 50 only includes single horizontal component and single vertical component.By power splitter
Energy in part realizes the gain of aerial radiation, adds isolation resistance and can effectively hinder branch port reflected signal to other ports
Impact, improve the stability of power splitter, and reasonably microstrip line distribution and length arrange and also ensure that antenna entirety is tied
The miniaturization of structure makes feeder structure compacter.
Refer to Fig. 1 and Fig. 2, in embodiment, microstrip line 121 level to the left of the left output port of described power splitter 61 is prolonged
After stretching, bending vertically upward extends the signal input forming described circular patch left port, the right output port of described power splitter 61
Microstrip line 121 level extend to the right after bending vertically upward extend again level and extend and then formed described circular patch 11 to the left
The signal input of right output port, microstrip line 121 circle segment of left and right port forms the partial shape of " square ", adjusts right-hand member
Microstrip line 121 distance makes two with the twice that difference is right output port horizontal-extending length for the first time of microstrip line 121 distance of left end
The phase contrast of individual port is 90 ° and then forms circular polarization radiation, a length of S that definition right output port is the most horizontal-extending, in conjunction with
Frequency is finely adjusted and finally show that about as S=13.7mm, the phase contrast of port is 90 °, the now twice of S i.e. 27.4mm etc.
In 1/4th length relative to medium medium wavelength.By with third level power divider structure after microstrip line length and shape tie
The numerical value of sum of fundamental frequencies rate carries out debugging the stablizing of phase contrast ensureing antenna left and right port signal.
Refer to Fig. 1, in embodiment, described substrate 20 dielectric constant is higher, and dielectric constant is 4.3, loss tangent angle
Being 0.0035, thickness is 3.05mm, and material is copper, and described substrate thickness is very thin, and the support in this, as antenna makes guided wave believe
The reduction of number wavelength reaches more than 50%, and is lost less.
Refer to Fig. 1 and Fig. 2, in embodiment, described micro-strip paster antenna 11 is circular patch or square patch, excellent
Choosing, select circular patch, the electric current of input is converted into electromagnetic wave, the radius of definition circular patch 11 by described circular patch 11
For r, wherein r is in the range of 45mm～48mm, it is preferred that r is 45.5mm, and described circular patch 11 works in TM11 pattern, its
Radiation efficiency is about 94%, and gain is about 7.1dB, and band is wider than 1%.Described microstrip line can be divided into the first microstrip line and second micro-
Band wire, the characteristic impedance of described first microstrip line is 50 Ω, and the width defining described first microstrip line is w1, wherein w1Scope
For 5.8mm～6.3mm, it is preferred that w1For 6.2mm；The characteristic impedance of described second microstrip line is 70.71 Ω, described second micro-
Band wire is used for connecting power splitter part.The form using circular patch has bigger surface relative to the microstrip antenna of other forms
As Ji, the girth in gap is bigger, is greatly improved radianting capacity.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement etc. done, within should be included in the scope of protection of the invention.
Claims (9)
1. the Ultrathin high gain reading and writing device antenna battle array for rfid system, it is characterised in that: antenna body is pcb board；Institute
State pcb board include antenna system, substrate and be attached to the substrate lower floor copper sheet paper tinsel as antenna ground plate；Described antenna system bag
Include interconnective feed line part, earth plate and several micro-strip paster antennas, described feed line part include power splitter and
The microstrip line being attached thereto, described microstrip line is connected two inputs of formation with micro-strip paster antenna；Described feed line line part
Dividing and at least contain two-stage merit separation structure, the microstrip line being connected with first order merit separation structure is in bending distribution, and afterbody merit is divided
The microstrip line forming said two input in structure is that the feed distribution of lengths of 90 ° of vertical distribution and microstrip line makes two inputs
The phase contrast of end is 90 °.
Ultrathin high gain reading and writing device antenna battle array for rfid system the most according to claim 1, it is characterised in that: described
Feed line contains three grades of merit separation structures, and described antenna is by total port input energy, and described three grades of merit separation structures are final
Will input energy eight equal parts.
Ultrathin high gain reading and writing device antenna battle array for rfid system the most according to claim 2, it is characterised in that: described
Power splitter is microstrip line power splitter, and energy is halved by described each power splitter by point ports such as power, described each power
Decile port is connected by the input of microstrip line with next stage power splitter.
Ultrathin high gain reading and writing device antenna battle array for rfid system the most according to claim 3, it is characterised in that: definition
The vertical length of every grade of described merit separation structure microstrip line is d, and wherein d is 15mm～25mm, defines described first order merit separation structure
In output microstrip line horizontal continuation total length be L1, wherein L1The half-wavelength of a length of free space, define described
Output microstrip line horizontal continuation total length in two grades of power divider structures is L2, wherein L2A length of free space four
/ mono-wavelength.
Ultrathin high gain reading and writing device antenna battle array for rfid system the most according to claim 4, it is characterised in that: described
Described circular patch left port it is bent to form vertically upward after the microstrip line of the left output port of power splitter is the most horizontal-extending
Signal inputs, and the microstrip line level of the right output port of described power splitter bends level vertically upward after extending to the right again and prolongs to the left
Put in and form the signal input of described circular patch right output port, adjust for the first time the most horizontal-extending length of right output port make two defeated
The phase contrast entering end is 90 °.
6., according to the arbitrary described Ultrathin high gain reading and writing device antenna battle array for rfid system of Claims 1 to 5, its feature exists
In: subsidiary isolation resistance in described each power splitter, its resistance value is 100 Europe.
Ultrathin high gain reading and writing device antenna battle array for rfid system the most according to claim 1, it is characterised in that: described
Substrate dielectric constant be 4.3, loss tangent angle is 0.0035, and thickness is 3.05mm, and material is copper.
Ultrathin high gain reading and writing device antenna battle array for rfid system the most according to claim 1, it is characterised in that: described
Micro-strip paster antenna be circular patch, the electric current of input is converted into electromagnetic wave by described circular patch, definition circular patch
Radius is r, and wherein the radius value of r is 45mm～48mm, and described circular patch mode of operation is TM11 pattern.
Ultrathin high gain reading and writing device antenna battle array for rfid system the most according to claim 1, it is characterised in that: described
Microstrip line can be divided into the first microstrip line and the second microstrip line, and the characteristic impedance of described first microstrip line is 50 Ω, defines described
The width of one microstrip line is w1, wherein w1In the range of 5.8mm～6.3mm；The characteristic impedance of described second microstrip line is 70.71
Ω, wherein w2In the range of 2.8mm～3.4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610771594.5A CN106169649A (en) | 2016-08-30 | 2016-08-30 | A kind of Ultrathin high gain reading and writing device antenna battle array for rfid system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610771594.5A CN106169649A (en) | 2016-08-30 | 2016-08-30 | A kind of Ultrathin high gain reading and writing device antenna battle array for rfid system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106169649A true CN106169649A (en) | 2016-11-30 |
Family
ID=57376994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610771594.5A Withdrawn CN106169649A (en) | 2016-08-30 | 2016-08-30 | A kind of Ultrathin high gain reading and writing device antenna battle array for rfid system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106169649A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106911012A (en) * | 2017-04-01 | 2017-06-30 | 华侨大学 | A kind of high-gain reading and writing device antenna of fitting room rfid system |
| CN106953174A (en) * | 2017-03-21 | 2017-07-14 | 厦门致联科技有限公司 | One kind is anti-to misread antenna |
| CN107123851A (en) * | 2017-04-01 | 2017-09-01 | 厦门致联科技有限公司 | A kind of fitting room RFID system reading and writing device antenna based on miniaturization technology |
| CN109378581A (en) * | 2018-11-22 | 2019-02-22 | 厦门大学 | A kind of circular microstrip paster antenna radiating double frequency whirlpool wave |
| WO2019041180A1 (en) * | 2017-08-30 | 2019-03-07 | Star Systems International Limited | An antenna for use in electronic communication systems |
| CN110707419A (en) * | 2019-08-17 | 2020-01-17 | 嘉兴诺艾迪通信科技有限公司 | Directional antenna for filling of zenith communication blind area and ground noise suppression |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07176944A (en) * | 1993-12-20 | 1995-07-14 | Fujitsu General Ltd | Microstrip antenna |
| JP2001267835A (en) * | 2000-03-17 | 2001-09-28 | Toshiba Corp | Circularly polarized wave microstrip antenna and cross polarization component reducing method to be used for the antenna |
| JP2006311478A (en) * | 2005-03-31 | 2006-11-09 | Furukawa Electric Co Ltd:The | Circular polarizing microstrip antenna and circular polarizing microstrip antenna apparatus |
| US20100207830A1 (en) * | 2009-02-18 | 2010-08-19 | Harris Corporation | Planar antenna having multi-polarization capability and associated methods |
| CN201994425U (en) * | 2011-03-14 | 2011-09-28 | 上海旌泓通信技术有限公司 | High-grain circularly polarized radio frequency identification (RFID) antenna |
| CN103165988A (en) * | 2013-03-13 | 2013-06-19 | 电子科技大学 | Broadband circularly-polarized radio frequency identification (RFID) reader antenna |
| CN104993245A (en) * | 2015-06-25 | 2015-10-21 | 常州吉赫射频电子技术有限公司 | S-waveband communication-in-motion double-frequency circularly polarized micro-strip antenna and array thereof |
| CN206225536U (en) * | 2016-08-30 | 2017-06-06 | 厦门致联科技有限公司 | A kind of Ultrathin high gain reading and writing device antenna battle array for rfid system |
-
2016
- 2016-08-30 CN CN201610771594.5A patent/CN106169649A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07176944A (en) * | 1993-12-20 | 1995-07-14 | Fujitsu General Ltd | Microstrip antenna |
| JP2001267835A (en) * | 2000-03-17 | 2001-09-28 | Toshiba Corp | Circularly polarized wave microstrip antenna and cross polarization component reducing method to be used for the antenna |
| JP2006311478A (en) * | 2005-03-31 | 2006-11-09 | Furukawa Electric Co Ltd:The | Circular polarizing microstrip antenna and circular polarizing microstrip antenna apparatus |
| US20100207830A1 (en) * | 2009-02-18 | 2010-08-19 | Harris Corporation | Planar antenna having multi-polarization capability and associated methods |
| CN201994425U (en) * | 2011-03-14 | 2011-09-28 | 上海旌泓通信技术有限公司 | High-grain circularly polarized radio frequency identification (RFID) antenna |
| CN103165988A (en) * | 2013-03-13 | 2013-06-19 | 电子科技大学 | Broadband circularly-polarized radio frequency identification (RFID) reader antenna |
| CN104993245A (en) * | 2015-06-25 | 2015-10-21 | 常州吉赫射频电子技术有限公司 | S-waveband communication-in-motion double-frequency circularly polarized micro-strip antenna and array thereof |
| CN206225536U (en) * | 2016-08-30 | 2017-06-06 | 厦门致联科技有限公司 | A kind of Ultrathin high gain reading and writing device antenna battle array for rfid system |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106953174A (en) * | 2017-03-21 | 2017-07-14 | 厦门致联科技有限公司 | One kind is anti-to misread antenna |
| CN106953174B (en) * | 2017-03-21 | 2023-04-28 | 厦门致联科技有限公司 | Misreading prevention antenna |
| CN106911012A (en) * | 2017-04-01 | 2017-06-30 | 华侨大学 | A kind of high-gain reading and writing device antenna of fitting room rfid system |
| CN107123851A (en) * | 2017-04-01 | 2017-09-01 | 厦门致联科技有限公司 | A kind of fitting room RFID system reading and writing device antenna based on miniaturization technology |
| CN107123851B (en) * | 2017-04-01 | 2020-02-21 | 厦门致联科技有限公司 | Fitting room RFID system reader-writer antenna based on miniaturization technology |
| WO2019041180A1 (en) * | 2017-08-30 | 2019-03-07 | Star Systems International Limited | An antenna for use in electronic communication systems |
| US10862220B2 (en) | 2017-08-30 | 2020-12-08 | Star Systems International Limited | Antenna for use in electronic communication systems |
| CN109378581A (en) * | 2018-11-22 | 2019-02-22 | 厦门大学 | A kind of circular microstrip paster antenna radiating double frequency whirlpool wave |
| CN109378581B (en) * | 2018-11-22 | 2021-03-12 | 厦门大学 | Microstrip circular patch antenna for radiating double-frequency vortex wave |
| CN110707419A (en) * | 2019-08-17 | 2020-01-17 | 嘉兴诺艾迪通信科技有限公司 | Directional antenna for filling of zenith communication blind area and ground noise suppression |
| CN110707419B (en) * | 2019-08-17 | 2023-10-24 | 嘉兴诺艾迪通信科技有限公司 | Directional antenna for zenithal communication blind area filling and ground noise suppression |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106169649A (en) | A kind of Ultrathin high gain reading and writing device antenna battle array for rfid system | |
| US8196829B2 (en) | Chip module, sim card, wireless device and wireless communication method | |
| US9104954B2 (en) | Radiofrequency transponder device with optimized passive resonant circuit | |
| US7633445B2 (en) | Radio frequency identification tag and antenna for radio frequency identification tag | |
| US8077115B2 (en) | Antenna device, radio tag reader and article management system | |
| CN102130373A (en) | Miniaturized radio frequency identification label and microstrip patch antenna therein | |
| CN108598667B (en) | Compact broadband circularly polarized back cavity type RFID reader antenna | |
| CN206349489U (en) | A kind of double-decker broadband UHF RFID anti-metal tag antennas | |
| US20120261478A1 (en) | Rfid tag | |
| CN206225536U (en) | A kind of Ultrathin high gain reading and writing device antenna battle array for rfid system | |
| CN208570901U (en) | A kind of compact wideband circular polarisation back cavity type RFID reader antenna | |
| CN104866893B (en) | Coupling capacitance RFID label tag | |
| CN104979618B (en) | RFID label | |
| CN106654524A (en) | Double-layer structured broadband UHF RFID anti-metal tag antenna | |
| CN102035071A (en) | RFID (Radio Frequency Identification) reader antenna with double-frequency circular polarization features | |
| CN101527391A (en) | Plate-shaped feeding air-dielectric patch antenna | |
| CN103715498A (en) | Small circularly-polarized anti-metal tag antenna based on split resonant ring | |
| KR101237905B1 (en) | Rfid reader antenna | |
| CN202817177U (en) | Plane opening double-ring antenna of near-field RFID reader-writer used for UHF frequency range | |
| CN102820535A (en) | Near-field radio frequency identification (RFID) reader plane opening dual-ring antenna for ultra high frequency (UHF) band | |
| CN104377454B (en) | A kind of micro-strip yagi aerial and hand-held set | |
| CN104993223B (en) | Rfid label antenna | |
| CN104577343A (en) | Compact dual-circular-polarization RFID (radio frequency identification) microstrip antenna | |
| CN107230820A (en) | A kind of ultra-high frequency RFID label antenna of T-shaped matching impedance structure | |
| KR101237906B1 (en) | Rfid reader antenna |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20161130 |
|
| WW01 | Invention patent application withdrawn after publication |