CN103401074B - Broadband circularly-polarized slot antenna applied to radio frequency identification system - Google Patents
Broadband circularly-polarized slot antenna applied to radio frequency identification system Download PDFInfo
- Publication number
- CN103401074B CN103401074B CN201310294193.1A CN201310294193A CN103401074B CN 103401074 B CN103401074 B CN 103401074B CN 201310294193 A CN201310294193 A CN 201310294193A CN 103401074 B CN103401074 B CN 103401074B
- Authority
- CN
- China
- Prior art keywords
- gap
- metal
- ground plate
- metal band
- horizontal
- 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 claims abstract description 68
- 229910052751 metal Inorganic materials 0.000 claims abstract description 68
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 239000000758 substrate Substances 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims description 2
- 230000010287 polarization Effects 0.000 description 13
- 230000005855 radiation Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Landscapes
- Waveguide Aerials (AREA)
Abstract
The invention discloses a broadband circularly-polarized slot antenna applied to a radio frequency identification system. The broadband circularly-polarized slot antenna comprises a metal substrate, a metal grounding plate, coplanar waveguide transmission wires and an SMA connector, wherein the metal grounding plate covers the metal substrate; the SMA connector is arranged on one side of the metal grounding plate; an I-shaped chamfer is arranged on the left lower corner of the metal grounding plate; a U-shaped micro-strip gap is opened in the middle of the metal grounding plate; the lower part of the U-shaped micro-strip gap is connected with the two coplanar waveguide transmission wires; a metal strip of the metal grounding plate is reserved between the two coplanar waveguide transmission wires; one end of the metal strip is connected with the SMA connector. Compared with the prior art, the broadband circularly-polarized slot antenna applied to the radio frequency identification system disclosed by the invention is simple in structure and easy to process, can realize the planarization of the antenna and is good for the conforming of the antenna and a carrier.
Description
Technical field
The present invention relates to one kind is applied to the broadband circle polarized slot antenna of radio-frequency recognition system, can be used for 2.4GHz radio frequency and know
The transmitting of other system and receiver module.
Background technology
Radio-frequency recognition system (RFID) is a kind of non-contacting automatic identification technology, and its general principle is to utilize radiofrequency signal
With Space Coupling (inductance and electromagnetic coupled) transmission characteristic, realize the automatic identification to identified object.Have wide as one
The technology of general application prospect, RFID product has been widely used in the various fields such as society, economy, national defence in recent years, false proof
Played an important role with aspects such as security control, traffic control, logistics and stock controls, and improve modern service industry,
Manufacture the efficiency of management of industry and the commercial values such as industry, medical and health, military affairs, postal service.
By reader, label and computer controls terminal three part form typical radio-frequency recognition system.Label carries
Different identity informations, this information is read at a distance by reader and passes computer controls terminal back and is managed collectively.?
In rfid system, particularly in the middle of storehouse management and logistics management, label often places that orientation is irregular, general reader
Antenna adopts single antenna, and the Research of Antenna Polarization is single, and beam coverage is narrow, tends not to meet to all irregular
The goods and materials label placed carries out non-blind area management and control and Region control management.For solving the above problems, the present invention proposes a kind of broadband
Circular polarized antenna, this antenna has wider circular polarisation bandwidth and good antenna pattern, significantly improves the performance of system, its
Planar structure is easy to and other carrier is conformal.
Content of the invention
The invention aims to providing one kind to be applied to the broadband circle polarized slot antenna of radio-frequency recognition system.
For reaching above-mentioned purpose, the present invention is to implement according to technical scheme below：
One kind is applied to the broadband circle polarized slot antenna of radio-frequency recognition system, including medium substrate, metal ground plate, coplanar
Waveguide transmission line and sub-miniature A connector, metal ground plate overlays on medium substrate, and sub-miniature A connector is arranged at metal ground plate, institute
State the metal ground plate lower left corner and be provided with " I " type corner cut；" u "-shaped microstrip gap is offered, " U " in the middle part of described metal ground plate
Shaped microstrip gap bottom connects two coplanar waveguide transmission lines, leaves the gold of metal ground plate in the middle of two coplanar waveguide transmission lines
Belong to band, one end of described metal band is connected with sub-miniature A connector.
Further, described " u "-shaped microstrip gap is made up of not wide horizontal gap and two identical vertical clearance gap,
The not wide structure of horizontal gap is made up of two different rectangular apertures of size, and the difference of size is in order to produce circularly polarised wave；
Two vertical lap seams are made up of the rectangle of identical size, and two vertical lap seams form " u "-shaped with the two ends UNICOM of horizontal gap respectively
Microstrip gap.
Preferably, described metal band is made up of a horizontal metal band and a vertical metal band, horizontal metal
Band becomes inverted "L" shaped with vertical metal band, and horizontal metal band stretches into " u "-shaped gap and metal ground plate short circuit, vertically gold
Belong to strap end to be connected with sub-miniature A connector.
Compared with prior art, beneficial effects of the present invention are：
1st, because the " u "-shaped microstrip gap employing coplanar waveguide transmission line feed and the metal with " I " shape corner cut connect
Floor panel structure, it is achieved that the broadband circular polarization characteristics of antenna, has wider circular polarisation bandwidth compared to existing circular polarized antenna.
Inventive antenna structure is simple, is easily worked.
2nd, the coplanar waveguide transmission line of the present invention, " u "-shaped microstrip gap and metal floor are printed on the side of medium substrate,
Achieve the planarization of antenna, conformal beneficial to antenna and carrier.
Brief description
Fig. 1 is the top view of the present invention；
Fig. 2 is the front view of the present invention；
Fig. 3 is the structure chart of the " u "-shaped microstrip gap of the present invention；
Fig. 4 is the return loss plot figure of inventive antenna；
Fig. 5 be the present invention in main radiation direction axle than with frequency variation curve figure；
Fig. 6 be the present invention in main radiation direction right-handed circular polarization gain with frequency variation curve figure；
Fig. 7 is that the present invention is operated in the right-handed circular polarization of H face and left-hand circular polarization directional diagram during 2.3GHz；
Fig. 8 is that inventive antenna is operated in the right-handed circular polarization of H face and left-hand circular polarization directional diagram during 2.4GHz；
Fig. 9 is that inventive antenna is operated in the right-handed circular polarization of H face and left-hand circular polarization directional diagram during 2.5GHz；
In figure：1st, medium substrate；2nd, metal ground plate；21st, " I " type corner cut；3rd, coplanar waveguide transmission line；31st, level gold
Belong to band；32nd, vertical metal bar；4th, " u "-shaped microstrip gap；41st, horizontal gap；42nd, vertical clearance gap；5th, sub-miniature A connector.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment the invention will be further described, here invention illustrative examples
And explanation is used for explaining the present invention, but not as a limitation of the invention.
As shown in Figure 1 and Figure 2, one kind is applied to the broadband circle polarized slot antenna of radio-frequency recognition system, including medium substrate 1,
Metal ground plate 2, coplanar waveguide transmission line 3 and sub-miniature A connector 5, metal ground plate 2 overlays on medium substrate 1, and sub-miniature A connector 5 is arranged
In one side of metal ground plate 2, described metal ground plate 2 lower left corner is provided with " I " type corner cut 21；Described metal ground plate 2
Middle part offers " u "-shaped microstrip gap 4, and " u "-shaped microstrip gap 4 bottom connects two coplanar waveguide transmission lines 3, two coplanar ripples
Lead the metal band leaving metal ground plate in the middle of transmission line 3, described one end of metal band is connected with sub-miniature A connector 5.
As shown in figure 3, described " u "-shaped microstrip gap 4 is by not wide horizontal gap 41 and two identical vertical lap seams
Gap 42 forms, and the not wide structure of horizontal gap 41 is made up of two different rectangular apertures of size, and the difference of size is in order to produce
Raw circularly polarised wave；Two vertical lap seams 42 are made up of the rectangle of identical size, two vertical lap seams 42 respectively with horizontal gap 41
Two ends UNICOM forms " u "-shaped microstrip gap 4, and the centre frequency of antenna circular polarisation is mainly determined by the girth of " u "-shaped microstrip gap 4
Fixed.
Preferably, described metal band is made up of a horizontal metal band 31 and a vertical metal band 32, level
Metal band 31 becomes inverted "L" shaped with vertical metal band 32, and horizontal metal band 31 stretches into " u "-shaped gap and metal ground plate 2
Short circuit, vertical metal band 32 end is connected with sub-miniature A connector 5.
A kind of embodiment, medium substrate 1 is the FR4 plate of material that one layer of relative dielectric constant is 4.4, and the length of plate of material is
44 millimeters, width is 44 millimeters, highly for 1 millimeter；Medium substrate 1 top layer type metal earth plate 2, metal ground plate 2 length
For 44 millimeters, width is 44 millimeters, and metal ground plate 2 lower left corner cuts a length of 20 millimeters, a width of 4 millimeters " I " shape corner cut 21.
Etching coplanar waveguide transmission line 3 and " u "-shaped microstrip gap 4 on medium substrate 1 top-level metallic earth plate 2.Coplanar
A length of 20 millimeters of the horizontal strip 31 of waveguide transmission line 3 central metal band, a width of 1 millimeter；A length of 25 millimeters of vertical strip 32,
A width of 2.2 millimeters, vertical strip 32 and both sides metal ground plate 2 are respectively at a distance of 0.8 millimeter.The horizontal joint of " u "-shaped microstrip gap 4
Gap 41 by one a length of 18.1 millimeters, wide 4 millimeters of narrow slit and one a length of 16.9 millimeters, a width of 7 millimeters of wide seam composition；Two hang down
Straight slot 42 is equivalently-sized, all a length of 5 millimeters, a width of 3 millimeters.
Medium substrate 1 top layer prints metal ground plate 2, cuts " I " shape corner cut 21 in metal ground plate 2 lower left corner, and etches
Coplanar waveguide transmission line 3 and " u "-shaped microstrip gap 4, size is as described above, be finally welded on coplanar ripple by the inner core of sub-miniature A connector 5
Lead on transmission line 3, the crust of sub-miniature A connector 5 is welded on metal ground plate 2, and complete the present invention is applied to radio-frequency recognition system
The making of broadband circle polarized slot antenna.
The present invention can be further illustrated by following emulation：
1st, emulation content
Damaged using the echo that simulation software is applied to the broadband circle polarized slot antenna of radio-frequency recognition system to above-described embodiment
Consumption, axle ratio, gain, far field radiation pattern carry out simulation calculation.
2nd, simulation result
Fig. 4 is the return loss plot figure of inventive antenna.Be can be seen that by Fig. 4, the 10dB impedance band of inventive antenna
A width of 1050MHz (2.07-3.12GHz), can cover radio-frequency recognition system 2.4GHz frequency range completely.
Fig. 5 is the axle of the main radiation direction of inventive antenna than the curve map changing with frequency.As seen in Figure 5 originally
Invention antenna is in main radiation direction axle than 600MHz a width of less than the band of 3dB (2.17-2.77GHz).Can obtain in conjunction with Fig. 5
The circular polarisation bandwidth of operation of inventive antenna is 600MHz (2.17-2.77GHz), has broadband circle polarized characteristic.
Fig. 6 be this antenna in main radiation direction right-handed circular polarization gain with frequency variation curve figure.As seen in Figure 6
Inventive antenna right-handed circular polarization gain in circular polarisation bandwidth of operation (2.17-2.77GHz) is more than 3dB.
Fig. 7, Fig. 8, Fig. 9 are respectively the H face dextrorotation circle of selected 2.3GHz, 2.4GHz and 2.5GHz in circular polarisation frequency range
Polarization (RHCP) and left-hand circular polarization (LHCP) directional diagram.As can be seen from the figure antenna is in the main radiation direction of each frequency range all
Achieve circular polarisation, thus the present invention is applied to the broadband circle polarized slot antenna of radio-frequency recognition system and has good circular polarisation
Radiation characteristic.
Technical scheme is not limited to the restriction of above-mentioned specific embodiment, and every technology according to the present invention scheme is done
The technology deformation going out, each falls within protection scope of the present invention.
Claims (2)
1. a kind of broadband circle polarized slot antenna being applied to radio-frequency recognition system, including medium substrate (1), metal ground plate
(2), coplanar waveguide transmission line (3) and sub-miniature A connector (5), metal ground plate (2) overlays on medium substrate (1), and sub-miniature A connector (5) sets
Be placed in one side of metal ground plate (2) it is characterised in that：Described metal ground plate (2) lower left corner is provided with " I " type corner cut
(21)；" u "-shaped microstrip gap (4) is offered, " u "-shaped microstrip gap (4) bottom connects two in the middle part of described metal ground plate (2)
Bar coplanar waveguide transmission line (3), leaves the metal band of metal ground plate in the middle of two coplanar waveguide transmission lines (3), described
One end of metal band is connected with sub-miniature A connector (5), described " u "-shaped microstrip gap (4) by not wide horizontal gap (41) and
Two identical vertical clearance gap (42) compositions, the not wide structure of horizontal gap (41) is by the different rectangular aperture group of two sizes
Become；Two vertical clearance gap (42) are made up of the rectangle of identical size, two vertical clearance gap (42) respectively with horizontal gap (41)
Two ends UNICOM formed " u "-shaped microstrip gap (4).
2. the broadband circle polarized slot antenna being applied to radio-frequency recognition system according to claim 1 it is characterised in that：Institute
The metal band stated is made up of a horizontal metal band (31) and a vertical metal band (32), horizontal metal band (31) and hang down
Straight metal band (32) becomes inverted "L" shaped, and horizontal metal band (31) stretches into " u "-shaped microstrip gap and metal ground plate (2) short circuit,
Vertical metal band (32) end is connected with sub-miniature A connector (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310294193.1A CN103401074B (en) | 2013-07-15 | 2013-07-15 | Broadband circularly-polarized slot antenna applied to radio frequency identification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310294193.1A CN103401074B (en) | 2013-07-15 | 2013-07-15 | Broadband circularly-polarized slot antenna applied to radio frequency identification system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103401074A CN103401074A (en) | 2013-11-20 |
| CN103401074B true CN103401074B (en) | 2017-02-15 |
Family
ID=49564648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310294193.1A Expired - Fee Related CN103401074B (en) | 2013-07-15 | 2013-07-15 | Broadband circularly-polarized slot antenna applied to radio frequency identification system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103401074B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647155B (en) * | 2014-01-07 | 2015-06-10 | 哈尔滨工业大学 | Low-axial-ratio broadband circularly polarized micro-strip antenna |
| CN103746188B (en) * | 2014-01-15 | 2015-06-24 | 哈尔滨工业大学 | Dual circularly polarized S-band printed antenna based on gap perturbation |
| CN104269609B (en) * | 2014-09-16 | 2019-03-15 | 深圳汉阳天线设计有限公司 | A kind of slot antenna using resonant feed structure |
| CN105990673A (en) * | 2015-02-09 | 2016-10-05 | 青岛大学 | Method for realizing miniaturization and broadbandization of printed slot-type mobile phone antenna |
| CN106252833B (en) * | 2016-07-29 | 2019-03-15 | 西安电子科技大学 | A kind of low section broadband UHF RFID antenna |
| CN106207415A (en) * | 2016-07-29 | 2016-12-07 | 西安电子科技大学 | One is applied to radio-frequency recognition system broadband line poliarizing antenna |
| CN109860991B (en) * | 2017-11-30 | 2022-10-11 | 新加坡国立大学 | Conformal broadband circularly polarized capsule antenna |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101038983A (en) * | 2006-03-13 | 2007-09-19 | 中国科学院电子学研究所 | Variable frequency coupling feeder apparatus for wide-band microstrip aerial |
| CN201117806Y (en) * | 2007-11-12 | 2008-09-17 | 杭州电子科技大学 | Coplanar wave-guide single point power feeding back cavity circular-polarization antenna |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8704719B2 (en) * | 2010-11-23 | 2014-04-22 | General Motors Llc | Multi-function antenna |
| US8957817B2 (en) * | 2011-06-06 | 2015-02-17 | University Of Dayton | Miniaturized and reconfigurable CPW square-ring slot antenna including ferroelectric BST varactors |
-
2013
- 2013-07-15 CN CN201310294193.1A patent/CN103401074B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101038983A (en) * | 2006-03-13 | 2007-09-19 | 中国科学院电子学研究所 | Variable frequency coupling feeder apparatus for wide-band microstrip aerial |
| CN201117806Y (en) * | 2007-11-12 | 2008-09-17 | 杭州电子科技大学 | Coplanar wave-guide single point power feeding back cavity circular-polarization antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103401074A (en) | 2013-11-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103401074B (en) | Broadband circularly-polarized slot antenna applied to radio frequency identification system | |
| CN102130373A (en) | Miniaturized radio frequency identification label and microstrip patch antenna therein | |
| CN103515710B (en) | Dual-frequency-band slot antenna based on half-mode substrate integrated waveguide | |
| EP2797165A1 (en) | Rfid tag aerial with ultra-thin dual-frequency microstrip patch aerial array | |
| CN201966324U (en) | Radio frequency identification double-frequency tag antenna | |
| CN105305040A (en) | Antenna used for anti-metal tag and antenna signal transmitting and receiving method | |
| CN104362426A (en) | Broadband UHF (ultra-high frequency) RFID (radio frequency identification) reader antenna | |
| CN204497366U (en) | Wireless radio frequency discrimination RFID label antenna | |
| CN102820531A (en) | RFID (radio frequency identification) tag antenna with compensation structure, RFID tag and system | |
| CN112164861B (en) | Miniaturized foldable ultrahigh-frequency anti-metal anti-liquid tag antenna | |
| CN104916907A (en) | Ultra-wideband monopole antenna with three band rejection characteristics | |
| CN203456593U (en) | Double-frequency-band slot antenna based on half-mode substrate integrated waveguides | |
| CN105375099A (en) | A two-frequency band antenna and a signal transmitting and receiving method of the antenna | |
| KR101459768B1 (en) | Antenna | |
| CN202205887U (en) | RFID tag antenna with compensation structure, RFID tag and RFID system | |
| CN208336496U (en) | A kind of wide band high-gain circular polarisation RFID antenna | |
| CN202503104U (en) | Ultrathin dual-band microstrip patch antenna array RFID tag antenna | |
| Zhang et al. | Design of antennas for rfid application | |
| KR101349519B1 (en) | Antenna | |
| Mathew et al. | A modified bow-tie antenna for dual band RFID applications | |
| CN203932311U (en) | A kind of four trap UWB antennas based on EBG structure | |
| CN212647516U (en) | Novel dual-frequency smart card | |
| CN217641792U (en) | Microstrip slot antenna with low cross polarization | |
| CN212162074U (en) | Large-range uniform magnetic field RFID near field antenna based on multi-unit coupling | |
| CN104681934A (en) | Four-notch UWB (ultra wide band) antenna based on EBG (electromagnetic band gap) structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170215 |