CN107257019A - A kind of dual-band dual-circular polarization reconstructable microstrip aerial of single-layer coplanar tree waveguide feed - Google Patents
A kind of dual-band dual-circular polarization reconstructable microstrip aerial of single-layer coplanar tree waveguide feed Download PDFInfo
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- CN107257019A CN107257019A CN201710255386.4A CN201710255386A CN107257019A CN 107257019 A CN107257019 A CN 107257019A CN 201710255386 A CN201710255386 A CN 201710255386A CN 107257019 A CN107257019 A CN 107257019A
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- minor matters
- circular polarization
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
- H01Q5/335—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors at the feed, e.g. for impedance matching
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- Waveguide Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a kind of dual-band dual-circular polarization reconstructable microstrip aerial of single-layer coplanar tree waveguide feed, comprising single-layer medium plate, and the CPW feed structures of the upper surface of single-layer medium plate are attached to, two axisymmetric T-shaped minor matters of low frequency circular polarisation are produced and produce the rotationally symmetrical inverted trapezoidal minor matters of two couples of high frequency circular polarisation.The present invention can realize frequency reconfiguration and circular polarisation reconstruct simultaneously.
Description
Technical field
The invention belongs to reconfigurable antenna studying technological domain in passive device, it is more particularly to a can be in two frequency bands
Upper to realize the single layer microstrip antenna that left-handed and right-handed circular polarization is reconstructed respectively, the antenna is fed by co-planar waveguide (CPW).
Background technology
Reconstructable microstrip aerial is an important directions of current antenna miniaturization and intelligent development, because it is in frequency
There is very big advantage in the flexibility of switching and the diversity of polarization, it is widely used in spectrum reuse field.Restructural
Antenna can exponentially improve system message capacity, while effectively solving the electromagnetic interference in antenna system, improve antenna efficiency.
The same antenna element of reconfigurable antenna requirement can realize some or multiple spies in frequency, polarization or antenna pattern
Property on realize reconstruct, while can also ensure that other characteristics meet design requirement.
In the recent period, domestic and foreign scholars have done the research in many forward positions, such as 2003 University of California Yahya to reconfigurable antenna
Rahmat-Samii and Fan Yang[1]A kind of circular polarisation reconstruct microstrip slot antenna is proposed, by the symmetrical position of rectangular patch
Put fluting and realize that circular polarisation is reconstructed, while passing through coaxial feeding on rectangular patch diagonal with coaxial line.The antenna can be with
The reconstruct of left-handed and right-hand polarization is realized in 4.4GHz-4.8GHz frequency ranges.The same year, Matthias K.Fries and R ü
diger Vahldieck[2]Etc. proposing a kind of polarization reconfigurable antenna microstrip-fed based on sandwich construction, the antenna can be
2.25GHz-2.45GHz realizing linear polarization and left-right-hand circular polarization reconstruct in frequency band, wireless communication field can be widely used for.2012
December in year, Yu Shao and Zhangyou Chen[3]Propose the dual-band dual-circular polarization reconstruct individual layer of a co-planar waveguide list feedback
Microstrip antenna, the antenna is by the way that open loop shape and cross bath realize 2.45GHz and 5.75GHz height respectively respectively on floor
The circular polarisation reconstruct of two frequencies.The antenna is also single layer structure, but using microstrip-fed, impedance bandwidth and axial ratio bandwidth compared with
It is narrow, while the structure of double slit gap can not ensure that it has good antenna pattern.
The content of the invention
For the deficiency of above dual-band dual-circular polarization reconfigurable antenna, goal of the invention of the invention is to provide a kind of individual layer
The dual-band dual-circular polarization reconstructable microstrip aerial of coplanar wave guide feedback, the antenna list of frequency and circular polarisation reconstruct can be realized simultaneously
Meta structure and the feed structure for meeting two frequency-band antenna work, while ensure that antenna has preferable antenna pattern.
The goal of the invention of the present invention is achieved through the following technical solutions：
A kind of dual-band dual-circular polarization reconstructable microstrip aerial of single-layer coplanar tree waveguide feed, comprising single-layer medium plate, and
It is attached to CPW feed structures, two axisymmetric T-shaped minor matters of generation low frequency circular polarisation and the production of the upper surface of single-layer medium plate
Give birth to the rotationally symmetrical inverted trapezoidal minor matters of two couple of high frequency circular polarisation.
CPW feed structures include monopole antenna, second segment microstrip line and first paragraph microstrip line from top to bottom,
The second segment microstrip line and first paragraph microstrip line are up-narrow and down-wide, upper short lower length.
Preferably, T-shaped minor matters are attached on single-layer medium plate by PIN switches.
Preferably, inverted trapezoidal minor matters are attached on single-layer medium plate by PIN switches.
Preferably, the material of single-layer medium plate is the polytetrafluoroethylene (PTFE) that dielectric constant is 2.65.
The beneficial effects of the present invention are：
(1) as a result of single-layer medium plate, CPW feed, printed circuit board (PCB) form, so microstrip antenna keep it is smaller
Electric size (0.33 λL×0.4λL, wherein λLFor the corresponding wavelength of microstrip antenna lowest resonance frequency), realize that microstrip antenna is small-sized
The effect of change；
(2) two-stage microstrip line is employed at CPW feeder lines and makees impedance conversion, it is possible to obtain the impedance band of wider band
It is wide：Low frequency 700MHz (2.7GHz-3.4GHz), high frequency 900MHz (3.6GHz-4.5GHz), reach broadening microstrip antenna bandwidth
Effect；
(3) axisymmetric T-shaped minor matters are introduced when realizing low frequency circular polarisation, circle of the microstrip antenna in low-frequency band is realized
Polarization, left-right rotary 3dB axial ratio bandwidths reach 1.1GHz (2.6GHz-3.7GHz).
(4) centrosymmetric inverted trapezoidal minor matters are introduced when realizing high frequency circular polarisation, microstrip antenna are realized in high frequency
The circular polarisation of band, left-right rotary 3dB axial ratio bandwidths reach 200MHz (3.74GHz-3.94GHz).
(5) this microstrip antenna has stable bidirectional radiation directional diagram, in similar to monopole antenna directional diagram symmetrical
The figure of eight, 3dB or so is reached to the radiation gain at two ends.
(6) radiation patch is using the structure that is printed on one side, and medium substrate is the polytetrafluoroethylene (PTFE) that dielectric constant is 2.65, this
Material be as the most common sheet material of pcb board, it is cheap, it is easy to buy.So, this microstrip antenna low manufacture cost, it is easy to
Processing, can be in batches into production, with larger actual application value.
Brief description of the drawings
Fig. 1 is the structural representation of microstrip antenna described in embodiment, in figure marked as：1--CPW feeding interfaces；2--
One section of microstrip line；3-- second segment microstrip lines；4-- monopole antennas；5-- realizes the left-handed T shape minor matters of low frequency；6-- realizes low
The T-shaped minor matters of frequency dextrorotation；7-- realizes a pair of left-handed inverted trapezoidal minor matters of high frequency；8-- realizes a pair of inverted trapezoidals of high frequency dextrorotation
Minor matters；It is rounded groove in the middle of 11-- floors, floor；12-- single-layer medium plates；13--PIN switch junctions, pass through the connection
Point controls the access situation of each minor matters.
Figure is discussed in detail for microstrip antenna each several part size in embodiment in Fig. 2；
Fig. 3 is the simulated return loss figure in embodiment during microstrip antenna low frequency left-hand circular polarization；
Fig. 4 is axial ratio bandwidth simulation result figure of the microstrip antenna in low frequency left-hand circular polarization in embodiment；
Fig. 5 is simulated return loss figure of the microstrip antenna in antenna high frequency left-hand circular polarization in embodiment；
Fig. 6 is axial ratio bandwidth simulation result figure of the microstrip antenna when antenna is in high frequency left-hand circular polarization in embodiment.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
As shown in figure 1, a kind of dual-band dual-circular polarization restructural of single-layer coplanar tree waveguide feed described by the present embodiment is micro-
Band antenna is made up of four parts：Single-layer medium plate 12, CPW feed structures produce two axisymmetric T-shaped of low frequency circular polarisation
Minor matters, produce the rotationally symmetrical inverted trapezoidal minor matters of two couple of high frequency circular polarisation.Each structure footage parameter is referring to Fig. 2 and table 1.
Table 1
(1) single-layer medium plate 12：The part is used as the medium substrate of whole microstrip antenna, other all microstrip antenna knots
Structure is all attached to the upper surface of medium substrate in the form of printed circuit board (PCB), and the dielectric constant of the single-layer medium plate is 2.65, thickness
Spend for 0.8mm.
(2) CPW feed structures：The microstrip line string of main two sections of up-narrow and down-wide, the upper short lower length in co-planar waveguide in the part
Connection is constituted.Because the impedance of sub-miniature A connector is 50 ohm, in order to realize impedance matching, while meeting in the work of height two frequency bins
Impedance bandwidth requirement, CPW feeder lines are divided into two sections, the lower end of first paragraph microstrip line 2 is used as CPW feeding interfaces 1 and sub-miniature A connector
It is connected, second segment microstrip line 3 is used as impedance transformer.The monopole antenna 4 of the upper termination of second segment microstrip line 3 determines micro-strip
The working band of antenna.Wherein, the length of first paragraph microstrip line 2 is 5.5mm, and the width of first paragraph microstrip line 2 is 2.8mm, the
The length of two sections of microstrip lines 2 is 5mm, the width of second segment microstrip line 2 is 1.2mm, is used as the monopole antenna of radiating element
Length is, in 12.6mm, to which determine the working band of antenna for 2.7GHz-3.5GHz.
(3) low frequency part produces the axisymmetric T-shaped minor matters of left-right rotary polarization：The lateral length of T-shaped minor matters determines circle
The position of axial ratio valley point, longitudinal minor matters length of T-shaped minor matters determines the width of axial ratio bandwidth.Simultaneously, it is necessary to ensure axle
It is more corresponding with impedance bandwidth than bandwidth.Because T-shaped minor matters are in Antenna Operation, the electric current of monopole antenna can sense T-shaped branch
On section, so as to form orthogonal degenerate mode, circular polarisation is produced.T shapes minor matters are realized by PIN switches 13 and accessed, when realizing low frequency
When left-handed T-shaped minor matters 5 are accessed, left-hand circular polarization is produced.Correspondingly, when realizing that the T-shaped minor matters 6 of low frequency dextrorotation are accessed, produce
Right-handed circular polarization.When two T-shaped minor matters are accessed simultaneously, the resonance frequency of antenna can be to high frequency offset, so as to realize frequency weight
Structure, meanwhile, the introducing of T-shaped minor matters does not have destruction antenna point antenna pattern, is still radiated for the symmetrical figure of eight, gain reaches
Arrive 3dB or so.When designing low frequency circular polarisation, in addition it is also necessary to be that the realization of high frequency circular polarisation leaves in view of the limitation of antenna size
Enough spaces, the lateral length that T-shaped minor matters stretch into antenna is that 12.5mm, the longitudinal length of T-shaped minor matters are 9.6mm.
(4) HFS produces the rotationally symmetrical inverted trapezoidal minor matters of left-right rotary polarization：Due to low-and high-frequency circular polarisation minor matters
Stagger placement, so can not to stretch into inner antenna oversize for high frequency minor matters, otherwise there can be interference to low frequency circular polarisation, while influenceing day
The antenna pattern of line.In order to meet the impedance matching of antenna and realize circular polarisation, by observing chip surface electric current, by minor matters
Inverted trapezoidal is designed to, capacitive reactances is formed, while exciting high frequency degenerate mode.Inverted trapezoidal minor matters switch 13 by four PIN and realized
Access, when realizing that a pair of left-handed inverted trapezoidal minor matters 7 of high frequency access, realized a pair of inverted trapezoidal minor matters 8 disconnection of high frequency dextrorotation,
Left-hand circular polarization is realized, otherwise is right-handed circular polarization.The long edge lengths of inverted trapezoidal minor matters are 7mm, and bond length is 2.4mm, with
And trapezoidal a height of 6mm.Less trapezoidal height can be reduced effectively when high frequency minor matters go deep into inner antenna to antenna radiation pattern
Influence, while inverted trapezoidal minor matters formation capacitive reactances, it is possible to achieve antenna widens resistance in the more preferable impedance matching of high frequency treatment
Anti- and axial ratio bandwidth.
The main technical characteristic of this double-frequency double-circularly-poantenna antenna is exactly, using individual layer list feedback microstrip antenna, to realize respectively
The left-right-hand circular polarization reconstruct of 2.7-3.5GHz and 3.7-3.9GHz high-low frequency bands, low frequency practical bandwidth (impedance bandwidth and axle ratio
Bandwidth minimum) 800MHz (27%) is reached, high frequency reaches 200MHz (5%).Meanwhile, radiation patch and feed structure are all flat
Face print structure, is easy to processing, simple in construction.
Microstrip antenna material object is tested using vector network tester, echo when Fig. 3 is low frequency left-hand circular polarization
Loss figure, return loss plot when Fig. 5 is high frequency left-hand circular polarization.In microwave dark room, the far-field radiation direction of antenna is tested
Figure and axial ratio bandwidth, Fig. 4 are the axial ratio bandwidth figure in low frequency left-hand circular polarization；Fig. 6 is in high frequency left-hand circular polarization
Axial ratio bandwidth figure.Proved by testing, the present embodiment can be implemented.
It is understood that for those of ordinary skills, can be with technique according to the invention scheme and its hair
Bright design is subject to equivalent substitution or change, and all these changes or replacement should all belong to the guarantor of appended claims of the invention
Protect scope.
Bibliography
[1]F.Yang and Y.Rahmat-Samii,“A reconfigurable patch antenna using
switchable slots for circular polarization diversity,”IEEE Microw.Wireless
Comp.Lett.,vol.12,no.3,pp.96–98, Mar.2002..
[2]M.K.Fries,M.and R.Vahldieck,“Areconfigurable slot antenna
with switchable polarization,”IEEE Microw.Wireless Compon.Lett.,vol.13,no.11,
pp.490–492,Nov.2003
[3]B.Kim,B.Pan,S.Nikolaou,Y.Kim,J.Papapolymerou and M.M.Tentzeris"A
novel single-feed circular microstrip antenna with reconfigurable
polarization capability",IEEE Trans. Antennas Propag.,vol.56,no.3,pp.630-638
2008。
Claims (5)
1. a kind of dual-band dual-circular polarization reconstructable microstrip aerial of single-layer coplanar tree waveguide feed, comprising single-layer medium plate, and it is attached
The CPW feed structures in the upper surface of single-layer medium plate, two axisymmetric T-shaped minor matters of generation low frequency circular polarisation and generation
The rotationally symmetrical inverted trapezoidal minor matters of two couple of high frequency circular polarisation.
2. a kind of dual-band dual-circular polarization reconstructable microstrip aerial of single-layer coplanar tree waveguide feed according to claim 1, its
It is characterised by that the CPW feed structures include monopole antenna, second segment microstrip line and first paragraph microstrip line from top to bottom, institute
It is up-narrow and down-wide, upper short lower length to state second segment microstrip line and first paragraph microstrip line.
3. a kind of dual-band dual-circular polarization reconstructable microstrip aerial of single-layer coplanar tree waveguide feed according to claim 1, its
It is characterised by that the T-shaped minor matters are attached on single-layer medium plate by PIN switches.
4. a kind of dual-band dual-circular polarization reconstructable microstrip aerial of single-layer coplanar tree waveguide feed according to claim 1, its
It is characterised by that the inverted trapezoidal minor matters are attached on single-layer medium plate by PIN switches.
5. a kind of dual-band dual-circular polarization reconstructable microstrip aerial of single-layer coplanar tree waveguide feed according to claim 1, its
The material for being characterised by the single-layer medium plate is the polytetrafluoroethylene (PTFE) that dielectric constant is 2.65.
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| CN107994326A (en) * | 2017-12-06 | 2018-05-04 | 北京华镁钛科技有限公司 | A kind of U wave band Broadband Circular Polarization Microstrip Antenna |
| CN108666756A (en) * | 2018-06-21 | 2018-10-16 | 福州大学 | A kind of low section wideband directional slot antenna applied to GNSS |
| CN109301470A (en) * | 2018-10-29 | 2019-02-01 | 西安电子科技大学 | The restructural circular polarized antenna of the polarization of low radar cross section |
| CN110911834A (en) * | 2019-12-02 | 2020-03-24 | 成都瑞迪威科技有限公司 | Phased array antenna capable of realizing left-right rotation circular polarization switching |
| CN110994145A (en) * | 2019-12-02 | 2020-04-10 | 重庆邮电大学 | CPW (compact peripheral component interconnect) fed regular polygon nested fractal ultra-wideband antenna |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994326A (en) * | 2017-12-06 | 2018-05-04 | 北京华镁钛科技有限公司 | A kind of U wave band Broadband Circular Polarization Microstrip Antenna |
| CN107994326B (en) * | 2017-12-06 | 2023-10-27 | 北京华镁钛科技有限公司 | U-band broadband circularly polarized microstrip antenna |
| CN108666756A (en) * | 2018-06-21 | 2018-10-16 | 福州大学 | A kind of low section wideband directional slot antenna applied to GNSS |
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| CN109301470A (en) * | 2018-10-29 | 2019-02-01 | 西安电子科技大学 | The restructural circular polarized antenna of the polarization of low radar cross section |
| CN109301470B (en) * | 2018-10-29 | 2020-04-14 | 西安电子科技大学 | Polarization reconfigurable circularly polarized antenna with low radar cross section |
| CN110911834A (en) * | 2019-12-02 | 2020-03-24 | 成都瑞迪威科技有限公司 | Phased array antenna capable of realizing left-right rotation circular polarization switching |
| CN110994145A (en) * | 2019-12-02 | 2020-04-10 | 重庆邮电大学 | CPW (compact peripheral component interconnect) fed regular polygon nested fractal ultra-wideband antenna |
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Application publication date: 20171017 |