CN108777353A - A kind of high isolation low-cross polarization Double-polarization micro-strip array antenna - Google Patents
A kind of high isolation low-cross polarization Double-polarization micro-strip array antenna Download PDFInfo
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- CN108777353A CN108777353A CN201810505402.5A CN201810505402A CN108777353A CN 108777353 A CN108777353 A CN 108777353A CN 201810505402 A CN201810505402 A CN 201810505402A CN 108777353 A CN108777353 A CN 108777353A
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- 238000002955 isolation Methods 0.000 title claims abstract description 26
- 238000005388 cross polarization Methods 0.000 title claims abstract description 25
- 230000003071 parasitic effect Effects 0.000 claims abstract description 41
- 230000005855 radiation Effects 0.000 claims description 25
- 230000005540 biological transmission Effects 0.000 claims description 6
- 239000004020 conductor Substances 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000004677 Nylon Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 238000007639 printing Methods 0.000 claims description 3
- 238000003491 array Methods 0.000 claims description 2
- 239000006260 foam Substances 0.000 claims description 2
- 239000011810 insulating material Substances 0.000 claims description 2
- 229920002521 macromolecule Polymers 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 230000008878 coupling Effects 0.000 abstract description 9
- 238000010168 coupling process Methods 0.000 abstract description 9
- 238000005859 coupling reaction Methods 0.000 abstract description 9
- 230000004888 barrier function Effects 0.000 abstract description 3
- 239000000758 substrate Substances 0.000 abstract description 3
- 230000009977 dual effect Effects 0.000 description 6
- 230000010287 polarization Effects 0.000 description 6
- 238000004891 communication Methods 0.000 description 2
- 230000001808 coupling effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000024241 parasitism Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- 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
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
- H01Q1/523—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between antennas of an array
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/061—Two dimensional planar arrays
- H01Q21/065—Patch antenna array
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- Waveguide Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The present invention relates to antenna technical fields, and in particular to be a kind of high isolation low-cross polarization Double-polarization micro-strip array antenna.The micro-strip array antenna includes dielectric layer, feed layer and the fixing piece between parasitic layer, radiating layer, parasitic layer and radiating layer；Antenna provided by the invention improves the coupling efficiency of feed using high-k substrate, H-shaped slot-coupled structure, reduces gap size, improves interport isolation and cross polarization level；Introduce the impedance bandwidth that parasitic patch has widened antenna；Higher antenna gain is obtained by 2 × 2 array structure；By designing more sparse parallelly feeding network and carrying out barrier in the intensive place's arrangement metallic vias of feeder line, reduces the mutual coupling between feeder line to further increase interport isolation, reduce cross polarization level.
Description
Technical field
The present invention relates to antenna technical fields, and in particular to be a kind of high isolation low-cross polarization dual-polarized, microstrip array
Antenna.
Background technology
In recent years, since frequency spectrum resource increasingly consumes, communications-intensive degree is constantly promoted, and single-polarized antenna cannot
Modern communications are enough fully met in the demand of the availability of frequency spectrum, anti-interference etc., therefore dual polarized antenna comes into being.It is bipolar
Change antenna and be capable of providing the orthogonal linear polarization of two-way or circularly polarised wave, channeling is realized by polarity diversity, improves frequency profit
With rate and capacity of communication system；Anti-interference ability is improved by polarizing to switch, the scattering properties of target, the propagation of signal are special in addition
Property and antenna Transceiver Features it is related with polarization, therefore, dual polarized antenna has very heavy in antenna research field
The meaning wanted.Microstrip antenna have many advantages, such as simple in structure, low section, be easily integrated with it is conformal, thus quickly grow, using wide
It is general, be compared with frequently with dual polarized antenna form.
The main performance of dual polarized antenna is embodied in interport isolation and cross polarization level.Bulk it is limited or
Altogether in the case of radiating aperture, the isolation between double polarized micro strip antenna port is generally poor, and polarization purity is not high, using all kinds of couplings
The antenna for closing feed structure and mixed structure improves antenna performance, and general double polarized micro strip antenna interport isolation can reach
30~40dB, cross polarization level are less than -20dB.After constituting aerial array, due to the mutual coupling between radiation array element, feeding network
Between coupling and spurious radiation interport isolation and cross polarization level can be caused further to deteriorate.
Invention content
The object of the present invention is to provide a kind of high isolation low-cross polarization Double-polarization micro-strip array antenna, this kind of antenna has
The characteristics of dual polarised radiation, interport isolation are high, cross polarization level is low, bandwidth, high gain can be achieved.
The technical scheme is that：
A kind of high isolation low-cross polarization Double-polarization micro-strip array antenna, including parasitic layer, radiating layer, parasitic layer and radiation
Dielectric layer, feed layer and fixing piece between layer, from top to bottom, antenna top layer are parasitic layer, and parasitic layer includes parasitic patch
With second medium plate, parasitic patch is printed on the lower surface of second medium plate；Radiating layer includes radiation patch and first medium plate,
Radiation patch is printed on the upper surface of first medium plate；The medium in dielectric layer between parasitic layer and radiating layer is air；Institute
It states radiating layer and parasitic layer is used to form external electromagenetic wave radiation；Feed layer be located at radiating layer in the following, including the first current feed department,
Second current feed department, third dielectric-slab, earth plate and metallic vias, earth plate are close to first medium plate, are third below earth plate
Dielectric-slab, is the first current feed department and the second current feed department below third dielectric-slab, and the feed layer is used for radiating layer and parasitism
Layer feed-in electromagnetic wave signal.It is fixed by fixing piece 5 between each layer dielectric-slab.
The shape of the parasitic patch and radiation patch is circle, and number is four, parasitic patch and radiation patch
Center correspond；The second layer dielectric-slab and third layer dielectric-slab are closely pressed together by earth plate, are connected firmly
It is integrated；
It is etched with eight H-shaped gaps on earth plate, T-shaped placement between each two H-shaped gap forms one group, is divided into four
Group；First current feed department is made of first port and first transmission line, by first port to the first current feed department feed-in electromagnetism
Wave signal；Second current feed department is made of second port and second transmission line, by second port to the second current feed department feed-in
Electromagnetic wave signal.
The radiation patch, parasitic patch, the first current feed department, the second current feed department and earth plate are metallic conductor thin slice,
It is laid on dielectric-slab by applying copper printing technology.
Beneficial effects of the present invention are：
Antenna provided by the invention improves the coupling effect of feed using high-k substrate, H-shaped slot-coupled structure
Rate reduces gap size, improves interport isolation and cross polarization level；Introduce the impedance that parasitic patch has widened antenna
Bandwidth；Higher antenna gain is obtained by 2 × 2 array structure；By design more sparse parallelly feeding network and
The intensive place's arrangement metallic vias of feeder line carries out barrier, reduces the mutual coupling between feeder line to further increase interport isolation, drops
Low-cross polarization level.
Description of the drawings
Fig. 1 is the overall structure diagram of the present invention；
Fig. 2 is the vertical view (a) and side view (b) of a cell array antenna in dotted line frame in Fig. 1；
Fig. 3 is the vertical view of feed layer in the present invention.
Specific implementation mode
The embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.
Fig. 1 is the overall structure diagram of the present invention, and Fig. 2 is a cell array antenna in dotted line frame shown in Fig. 1
Vertical view (a) and side view (b), Fig. 3 be the vertical view of feed layer of the present invention.
From the figure, it can be seen that high isolation low-cross polarization Double-polarization micro-strip array antenna provided by the invention includes radiation
Dielectric layer 4 between layer 1, parasitic layer 2, feed layer 3, radiating layer 1 and parasitic layer 2 and fixing piece 5.Wherein radiating layer includes four
Piece radiation patch 11 and first medium plate 12, parasitic layer include four parasitic patch 21 and second medium plate 22, and feed layer 3 includes
First current feed department 31, the second current feed department 32, third dielectric-slab 33, earth plate 34 and metallic vias 35, radiating layer 1 and parasitic layer 2
Between dielectric layer 4 medium be air.Wherein, radiation patch 11 includes four patches including four chip units, parasitic patch 21
Blade unit, the first current feed department 31, the second current feed department 32 and earth plate 34 are metallic conductor thin slice, are applied by applying copper printing technology
It is located on dielectric-slab；The dielectric constant of first medium plate 12 is ε1(ε1=2.2), thickness T1(T1=5mm), second medium plate
22 dielectric constant is ε2(ε2=2.2), thickness T2(T2=1mm), the dielectric constant of third dielectric-slab 33 is ε3(ε3=6),
Thickness is T3(T3=0.8mm)；It is fixed by fixing piece 5 between each layer dielectric-slab, the fixing piece 5 is nylon column or Buddhist nun
Imperial screw.
As shown in Fig. 2, four radiation patch, 11, four parasitic patch 21 are all made of circular configuration in the present embodiment, it is practical
The shapes with 90 ° of rotational symmetry features such as square may be used in situation.In the present embodiment, first medium plate 12 and second
The medium in dielectric layer between dielectric-slab 22 is air, and spacing is H (H=11mm), can also be used in actual conditions foam,
Other insulating materials such as macromolecule plate replace air, to reduce the breakdown probability of antenna；First medium plate 12 and third medium
Plate 33 is pressed together tightly by earth plate 34.It is projected in vertical direction, radiation patch 11 and parasitic patch 21
Projection centre coincide.
As shown in figure 3, feed layer 3 includes the first current feed department 31, the second current feed department 32, third dielectric-slab 33, earth plate 34
And metallic vias 35.Wherein the first current feed department 31 includes first port 311 and first transmission line 312, and the second current feed department 32 includes
Second port 321 and second transmission line 322；Earth plate 34 is metallic conductor thin slice, is etched with eight H-shaped gaps 341 above, often
Two T-shaped placements in H-shaped gap form one group, are divided into four groups；First current feed department 31, the second current feed department 32 and H on earth plate 34
The intersection point in shape gap is projected about radiation patch central symmetry.Other other three groups in the present invention in addition to Fig. 2 also meet it is above-mentioned
Criterion.Metallic vias 35 is to penetrate six groups of aperture battle arrays of third dielectric-slab 33, and every group of aperture battle array is located between two twin leads
Midpoint, aperture inner wall be coated with metal.First current feed department 31 is encouraged by first port 311, downward along first T-branch
It transmits, encourages four H-shaped gaps 341 on earth plate respectively after two T-branches of the second level are divided into four tunnels, and will be electric
Magnetic energy coupling is transmitted in the radiation patch 11 of radiating layer 1 and the parasitic patch 21 of parasitic layer 2, to encourage the one of antenna
A polarization field；Second current feed department 32 is encouraged by second port 321, is transmitted downwards along first T-branch, by the two of the second level
A T-branch is divided into the four H-shaped gaps 341 encouraged respectively behind four tunnels on earth plate, and couple electromagnetic energy is transmitted to spoke
It penetrates in the radiation patch 11 of layer 1 and the parasitic patch 21 of parasitic layer 2, to encourage another polarization field of antenna.
The present invention uses high-k (ε3=6.0) substrate, H-shaped slot-coupled structure improve the coupling effect of feed
Rate reduces gap size, improves interport isolation and cross polarization level；It is presented additionally by the parallel connection for designing more sparse
Simultaneously at feeder line intensive place, arrangement metallic vias carries out barrier to electric network, reduces the mutual coupling between feeder line to further increase between port
Isolation reduces cross polarization level.
In the present embodiment, dual polarized antenna is devised with the method for the present invention, through actual test, two feed ends of antenna
The input terminal reflection loss of mouth is less than -10dB in 2.2~2.7GHz frequency ranges, and relative bandwidth reaches 20%.In above-mentioned frequency
Isolation is surveyed within the scope of rate, at two feed ports of antenna and is higher than 45dB, and each port actual measurement gain is higher than 12dBi, each to hold
Cross polarization level is less than -30dB in the arbitrary polarized actual measurement greatest irradiation direction of mouth.
By adjusting radiation patch, parasitic patch and the size for coupling gap, can design with similar performance, for not
With the double polarization array antenna of frequency range.
Claims (7)
1. a kind of high isolation low-cross polarization Double-polarization micro-strip array antenna, it is characterised in that：The micro-strip array antenna includes
Dielectric layer, feed layer and fixing piece between parasitic layer, radiating layer, parasitic layer and radiating layer；From top to bottom, antenna top layer is
Parasitic layer, parasitic layer include parasitic patch and second medium plate, and parasitic patch is printed on the lower surface of second medium plate；Radiating layer
Including radiation patch and first medium plate, radiation patch is printed on the upper surface of first medium plate；Between parasitic layer and radiating layer
Dielectric layer in medium be air；The radiating layer and parasitic layer are used to form external electromagenetic wave radiation；Feed layer is located at
Radiating layer is in the following, include the first current feed department, the second current feed department, third dielectric-slab, earth plate and metallic vias, earth plate is close to the
One dielectric-slab, is third dielectric-slab below earth plate, is the first current feed department and the second current feed department below third dielectric-slab, described
Feed layer is used for radiating layer and parasitic layer feed-in electromagnetic wave signal；It is fixed by fixing piece between each layer dielectric-slab；
The shape of the parasitic patch and radiation patch is circle, and number is four, in parasitic patch and radiation patch
The heart corresponds；The second layer dielectric-slab and third layer dielectric-slab are closely pressed together by earth plate, and it is one to connect firmly
Body；
It is etched with eight H-shaped gaps on earth plate, T-shaped placement between each two H-shaped gap forms one group, is divided into four groups；Institute
It states the first current feed department to be made of first port and first transmission line, be believed to the first current feed department feed-in electromagnetic wave by first port
Number；Second current feed department is made of second port and second transmission line, by second port to the second current feed department feed-in electromagnetism
Wave signal.
2. high isolation low-cross polarization Double-polarization micro-strip array antenna according to claim 1, it is characterised in that：The radiation
Patch, parasitic patch, the first current feed department, the second current feed department and earth plate are metallic conductor thin slice, by applying copper printing technology
It is laid on dielectric-slab.
3. high isolation low-cross polarization Double-polarization micro-strip array antenna according to claim 1, it is characterised in that：Described first
The permittivity ε of dielectric-slab1=2.2, thickness T1=5mm, the permittivity ε of second medium plate2=2.2, thickness T2=1mm, the
The dielectric constant of three dielectric-slabs is ε3=6, thickness T3=0.8mm；When in the dielectric layer between first medium plate and second medium plate
Medium be air when, spacing H=11mm.
4. high isolation low-cross polarization Double-polarization micro-strip array antenna according to claim 1, it is characterised in that：Described four
The shapes with 90 ° of rotational symmetry features such as square may be used in parasitic patch.
5. high isolation low-cross polarization Double-polarization micro-strip array antenna according to claim 1, it is characterised in that：It may be used
This kind of insulating materials of foam, macromolecule plate is instead of air as Jie in dielectric layer between first medium plate and second medium plate
Matter.
6. high isolation low-cross polarization Double-polarization micro-strip array antenna according to claim 1, it is characterised in that：The fixation
Part is nylon column or nylon screw.
7. being existed according to high isolation low-cross polarization Double-polarization micro-strip array antenna, feature described in claim 1 to 6 any bar
In：Also there is metallic vias, the metallic vias is to penetrate six groups of aperture battle arrays of third dielectric-slab, and every group of aperture battle array is located at two
Midpoint between twin lead, aperture inner wall are coated with metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810505402.5A CN108777353A (en) | 2018-05-24 | 2018-05-24 | A kind of high isolation low-cross polarization Double-polarization micro-strip array antenna |
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| CN201810505402.5A CN108777353A (en) | 2018-05-24 | 2018-05-24 | A kind of high isolation low-cross polarization Double-polarization micro-strip array antenna |
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Family
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| CN201810505402.5A Pending CN108777353A (en) | 2018-05-24 | 2018-05-24 | A kind of high isolation low-cross polarization Double-polarization micro-strip array antenna |
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Cited By (30)
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| CN109687116A (en) * | 2019-02-01 | 2019-04-26 | 桂林电子科技大学 | The minimized wide-band wide-beam circularly-polarizedmicrostrip microstrip antenna of C-band |
| CN110707426A (en) * | 2019-10-29 | 2020-01-17 | 天津大学 | A broadband high-gain compressed high-order mode dual-polarized differential antenna loaded with vias |
| CN110797654A (en) * | 2019-12-03 | 2020-02-14 | 惠州硕贝德无线科技股份有限公司 | High-isolation antenna between same frequency bands and micro base station |
| CN111180868A (en) * | 2019-12-30 | 2020-05-19 | 中国电子科技集团公司第十四研究所 | Satellite-borne SAR dual-polarization microstrip radiation subarray antenna |
| CN111276812A (en) * | 2020-03-16 | 2020-06-12 | 成都天锐星通科技有限公司 | Multi-layer microstrip antenna array element and antenna array surface |
| CN111326852A (en) * | 2020-02-28 | 2020-06-23 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Low-profile two-dimensional wide-angle scanning circularly polarized phased array antenna |
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