CN206490172U - Super high frequency radio frequency recognizes antenna - Google Patents
Super high frequency radio frequency recognizes antenna Download PDFInfo
- Publication number
- CN206490172U CN206490172U CN201720118269.9U CN201720118269U CN206490172U CN 206490172 U CN206490172 U CN 206490172U CN 201720118269 U CN201720118269 U CN 201720118269U CN 206490172 U CN206490172 U CN 206490172U
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- China
- Prior art keywords
- antenna
- paster
- infrabasal plate
- bottom plate
- capacitive
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Abstract
Antenna is recognized the utility model discloses a kind of super high frequency radio frequency, include bottom plate, it is installed with infrabasal plate and upper substrate on bottom plate successively from top to bottom, the upper and lower surface of infrabasal plate is respectively fixed with capacitive paster and radiation patch, the upper surface of upper substrate is fixed with parasitic patch, there is feed line to sequentially pass through bottom plate and infrabasal plate from top to bottom and be connected with capacitive paster, capacitive paster, radiation patch and parasitic patch are respectively rectangular configuration, and corner cut is respectively equipped with relative two jiaos.The utility model circular polarized antenna and microstrip structure, it is a kind of circular polarized antenna applied to ultrahigh-frequency radio-frequency identification system, 865~928MHz frequency range can be covered, and realizes miniaturization, low-loss design object, by emulation and actual test, design requirement has been reached.
Description
Technical field
The utility model is related to field of antenna, specifically a kind of super high frequency radio frequency identification antenna.
Background technology
REID is also radio frequency identification, belongs to one kind of the communication technology, is entered using 1-100GHz microwave
Row short distance identification communication, recognizes specific objective by radio signal and reads and writes related data, without identifying system with it is specific
Mechanical or optical contact is set up between target, REID has been obtained widely in fields such as service industry, safety applications
Using.
Radio-frequency recognition system includes 3 basic parts：Label, read write line and main frame.Label provides object data, read-write
Device is collected information from label and communicated with grid.Radio-frequency recognition system operates mainly in 125 kHz, 13.56 MHz,
The MHz of 433.92 MHz, 869MHz, 902~928, several frequency ranges such as 2.45 GHz and 5.8 GHz.
Antenna is as a crucial part in radio-frequency recognition system, and it enables label and read write line directly to carry out
Information exchange, and minimize, low loss antenna is its growing trend.
At present, existing radio frequency identification reader antenna has a variety of multi-forms and structure, such as flat plane antenna, spiral day
Line, dipole antenna etc., use linear polarization mode mostly, easily produce mismatch phenomenon, the frequency range of existing antenna covering is not
Enough width, it is impossible to fully meet the use of uhf-range, in addition, miniaturization, low loss antenna are its growing trend, it is existing
There is antenna to also have room for promotion.
Microstrip antenna is widely used because having the advantages that small volume, lightweight, cost are low, feeding classification is flexible,
But due to its narrower bandwidth, limit its application in practice.
Utility model content
The purpose of this utility model is that this practicality is new in the prior art, linear polarization mode easily produces mismatch phenomenon
Type provides a kind of super high frequency radio frequency identification antenna, using circular polarized antenna and microstrip structure, is that one kind is applied to super high frequency radio frequency
The circular polarized antenna of identifying system, can cover 865~928 MHz frequency range, and realize miniaturization, it is low-loss
Design object, by emulation and actual test, has reached design requirement.
The technical solution of the utility model is as follows：
A kind of super high frequency radio frequency recognizes antenna, includes bottom plate, it is characterised in that：On described bottom plate from top to bottom successively
Infrabasal plate and upper substrate are installed with, the upper and lower surface of the infrabasal plate is respectively fixed with capacitive paster and radiation patch, institute
The upper surface for stating upper substrate is fixed with parasitic patch, have feed line sequentially pass through from top to bottom described bottom plate and infrabasal plate and with
The capacitive paster is connected, and the capacitive paster, radiation patch and parasitic patch are respectively rectangular configuration, and relative two
Angle is respectively equipped with corner cut.
Described super high frequency radio frequency identification antenna, it is characterised in that：The corner of the infrabasal plate and upper substrate passes through respectively
Pin is sequentially fixed on described bottom plate.
Described super high frequency radio frequency identification antenna, it is characterised in that：The external bottom plate of described pin and infrabasal plate with
And it is respectively installed with supporting bead between the infrabasal plate and upper substrate.
The beneficial effects of the utility model：
1st, the utility model is the microstrip antenna of a radio-frequency recognition system, by way of to rectangular patch corner cut, real
Single-point feedback circular polarisation is showed；
2nd, the utility model increases the bandwidth of antenna by the way of dual-layer atenna and Capacitance Coupled feed, can be applied to surpass
High frequency field；
3rd, radio-frequency antenna of the present utility model uses FR4 sheet materials, low with manufacturing cost, simple and reliable for structure, uses model
Enclose wide, the features such as strong adaptability, and with larger bandwidth, preferable circular polarization characteristics can be widely used in radio frequency identification
In system.
Brief description of the drawings
Fig. 1 is the utility model structure sectional view.
Fig. 2 is the utility model part-structure sectional view.
Fig. 3 is the structure top view of infrabasal plate in the utility model.
Fig. 4 is the structural representation of parasitic patch in the utility model.
Fig. 5 is capacitive paster and the structural representation of radiation patch in the utility model.
Embodiment
Referring to accompanying drawing, a kind of super high frequency radio frequency recognizes antenna, includes fixed successively from top to bottom on bottom plate 1, bottom plate 1 pacify
Equipped with infrabasal plate 2 and upper substrate 3, the upper and lower surface of infrabasal plate 1 is respectively fixed with capacitive paster 5 and radiation patch 6, upper substrate 3
Upper surface be fixed with parasitic patch 4, have feed line 7 sequentially pass through from top to bottom bottom plate 1 and infrabasal plate 2 and with capacitive paster 5
It is connected, capacitive paster 5, radiation patch 6 and parasitic patch 4 are respectively rectangular configuration, and are respectively equipped with and cut at relative two jiaos
Angle.
In the utility model, the corner of infrabasal plate 2 and upper substrate 3 is sequentially fixed on bottom plate 1 by pin 8 respectively.
Supporting bead 9 is respectively installed between the external bottom plate of pin 8 and infrabasal plate 2 and infrabasal plate 2 and upper substrate 3.
The utility model is further described below in conjunction with accompanying drawing：
Referring to Fig. 1-3, the size of bottom plate 1 is 24 × 24mm, the size of infrabasal plate 2 and upper substrate 3 is 20 × 20 ×
1.5mm, choose relative dielectric constant for 4.4 FR4 plates as medium substrate, between infrabasal plate 2 and upper substrate 3 between distance by
The height of supporting bead 9 adjusts and is fixed as 1.55mm.Between the distributing point of feed line 7 and the center of infrabasal plate 2 away from
From the mm of d=4.45.
There is corner cut at two in parasitic patch 4, its patch size and corner cut size are referring to Fig. 4.
There is corner cut at two in capacitive paster 5 and radiation patch 6, its patch size and corner cut size are referring to Fig. 5.
Each physical dimension of antenna is to analyze to determine with calculating by antenna theory, passes through 3 D electromagnetic simulation software
HFSS is emulated, and constantly carries out one group of desired result that parameter adjustment is obtained.
The selection of medium substrate material is most important to design microstrip antenna, and size, performance to antenna have larger
Influence.The thickness effect bandwidth of medium substrate, using thicker substrate, can increase bandwidth.When relative dielectric constant reduces,
Bound reduction of the medium substrate to field, electromagnetic field radiation increase, bandwidth also accordingly increases.But this sheet material is typically relatively more high
Expensive, it is difficult to realize high performance-price ratio, the present invention is used as medium substrate using cheap FR4 plates.
The circular polarisation of antenna：Circularly polarised wave is by two amplitudes are equal, phase difference is ± 90 ° two line polarization wave structures
Into.The present invention realizes circular polarisation using some feed rectangular microstrip antenna, when rectangular microstrip antenna additional letter on the diagonal
And after separative element, the resonant frequency of the polarization orthogonal degenerate mode of excitation is offset, by constantly adjusting separative element
Size, it is possible to achieve advanced 45 ° of the phase of a mould, another mould phase falls behind 45 °, you can realize circularly polarised wave.
The bandwidth of antenna：Microstrip antenna limits its application in practice due to its narrower bandwidth.In order to realize broadening
The bandwidth of microstrip antenna, touch the mark requirement, using dual-layer atenna, and lower floor's feed layer antenna is again attached on main paster, main paster
Plus a parasitic patch, main paster fed by electromagnetic coupled to parasitic patch, and the resonance of two paster antennas is made during design
Centre frequency is different, and each resonant bandwidth intersects, and makes the overall bandwidth broadening of whole antenna, this certain layer
Introduce mainly extension axial ratio bandwidth.
The quality factor q of microstrip antenna has a certain impact to bandwidth, needs to drop low reactance-resistance ratio to obtain larger bandwidth.Adopt
After dual-layer atenna, the thickness increase of air dielectric substrate, the length increase of coaxial feed probe correspondingly makes the inductance of probe
Value increase.In order to reduce inductance, compensated by capacitive plates couple feed, so as to drop low reactance-resistance ratio, increase bandwidth.Electric capacity is pasted
Piece uses thin rectangular copper plate, and the capacitance of paster is changed by changing the length of side of paster, it is possible to realized very with coaxial probe
Good matching, so that the bandwidth of broadening antenna significantly.
Antenna return loss and the emulation of axle ratio：Return loss and the emulation of axle ratio are carried out to the antenna, it can be seen that 800~
S11 is less than -15 dB in 930MHz frequency range, with wider bandwidth, meets design requirement.860~935
In MHz frequency range, the axle ratio of antenna is less than 3 dB, specific good circular polarization characteristics.Can be with from the gain diagram of antenna
See, the antenna radiates maximum on the direction of θ=0 °, its gain maximum reaches 8.59 dBi, show the antenna have compared with
Good directionality and gain.
Claims (3)
1. a kind of super high frequency radio frequency recognizes antenna, include bottom plate, it is characterised in that：It is solid successively from top to bottom on described bottom plate
Dingan County is equipped with infrabasal plate and upper substrate, and the upper and lower surface of the infrabasal plate is respectively fixed with capacitive paster and radiation patch, described
The upper surface of upper substrate is fixed with parasitic patch, have feed line sequentially pass through from top to bottom described bottom plate and infrabasal plate and with institute
State capacitive paster to be connected, the capacitive paster, radiation patch and parasitic patch are respectively rectangular configuration, and at relative two jiaos
It is respectively equipped with corner cut.
2. super high frequency radio frequency according to claim 1 recognizes antenna, it is characterised in that：The four of the infrabasal plate and upper substrate
Angle is sequentially fixed on described bottom plate by pin respectively.
3. super high frequency radio frequency according to claim 2 recognizes antenna, it is characterised in that：The external bottom plate of described pin
Supporting bead is respectively installed between infrabasal plate and the infrabasal plate and upper substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720118269.9U CN206490172U (en) | 2017-02-09 | 2017-02-09 | Super high frequency radio frequency recognizes antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720118269.9U CN206490172U (en) | 2017-02-09 | 2017-02-09 | Super high frequency radio frequency recognizes antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206490172U true CN206490172U (en) | 2017-09-12 |
Family
ID=59765212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720118269.9U Expired - Fee Related CN206490172U (en) | 2017-02-09 | 2017-02-09 | Super high frequency radio frequency recognizes antenna |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206490172U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109244650A (en) * | 2018-10-25 | 2019-01-18 | 苏州博海创业微系统有限公司 | Wide-beam circularly-polarizedmicrostrip microstrip antenna and array |
| WO2020024115A1 (en) * | 2018-07-31 | 2020-02-06 | 华为技术有限公司 | Chip assembly and terminal device |
| CN112909538A (en) * | 2021-01-13 | 2021-06-04 | 宁波大学 | High-frequency RFID reader-writer antenna |
-
2017
- 2017-02-09 CN CN201720118269.9U patent/CN206490172U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020024115A1 (en) * | 2018-07-31 | 2020-02-06 | 华为技术有限公司 | Chip assembly and terminal device |
| CN109244650A (en) * | 2018-10-25 | 2019-01-18 | 苏州博海创业微系统有限公司 | Wide-beam circularly-polarizedmicrostrip microstrip antenna and array |
| CN112909538A (en) * | 2021-01-13 | 2021-06-04 | 宁波大学 | High-frequency RFID reader-writer antenna |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170912 Termination date: 20180209 |