CN106450777A - Circular polarization microstrip antenna - Google Patents
Circular polarization microstrip antenna Download PDFInfo
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- CN106450777A CN106450777A CN201610783535.XA CN201610783535A CN106450777A CN 106450777 A CN106450777 A CN 106450777A CN 201610783535 A CN201610783535 A CN 201610783535A CN 106450777 A CN106450777 A CN 106450777A
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- radiation patch
- medium substrate
- microstrip antenna
- circular polarization
- polarization microstrip
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- 230000010287 polarization Effects 0.000 title claims abstract description 39
- 230000005855 radiation Effects 0.000 claims abstract description 111
- 239000000758 substrate Substances 0.000 claims abstract description 42
- 239000004020 conductor Substances 0.000 claims description 8
- 230000008878 coupling Effects 0.000 abstract description 7
- 238000010168 coupling process Methods 0.000 abstract description 7
- 238000005859 coupling reaction Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 241001290864 Schoenoplectus Species 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/0428—Substantially flat resonant element parallel to ground plane, e.g. patch antenna radiating a circular polarised wave
-
- 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
-
- 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
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- Waveguide Aerials (AREA)
Abstract
The invention discloses a circular polarization microstrip antenna. The circular polarization microstrip antenna comprises a medium substrate, a first radiation paster, a second radiation paster, a grounding board and a coaxial cable, wherein the medium substrate comprises a first surface and a second surface which are opposite to the first surface, the first radiation paster is attached to the first surface of the medium substrate, the second radiation paster is embedded in the medium substrate and is in parallel with the first radiation paster, the grounding board is attached to the second surface of the medium substrate, and the coaxial cable penetrates through the medium substrate and the second radiation paster to connect with the first radiation paster. According to the circular polarization microstrip antenna, the two radiation pasters and near-field coupling between the two radiation pasters are utilized to expand axial ratio bandwidth of the antenna on the condition that antenna profile height does not increase, the circular polarization microstrip antenna in relatively wide frequency band scope can generate a axial ratio curve having three resonance peaks, circular polarized wave turning directions are consistent, compared with an antenna with same profile height, axial ratio bandwidth of the circular polarization microstrip antenna is improved to a wider mode.
Description
Technical field
A kind of the present invention relates to antenna technical field, in particular it relates to circular polarization microstrip antenna.
Background technology
Circular polarization microstrip antenna has the anti-ageing incoming wave moving back anti-misty rain interference, can accepting any direction and arbitrarily polarize
The features such as, circular polarization microstrip antenna is mainly fed using single feedback method, structure simple, easy to process it is adaptable to such as vehicle-mounted
The directions such as equipment, wechat communication.But, its axial ratio bandwidth of traditional microstrip antenna, often 1% about, is expanded in prior art
The method of antenna axial ratio bandwidth mainly has：One is to adopt couple feed, coplanar wave guide feedback, and the mode such as L-type probe feed can
Axial ratio bandwidth is increased to 30% about, but general gain is relatively low and its structure is not easy to processing and manufacturing；Two is in radiation patch
Increase parasitic patch above piece, increase impedance bandwidth and axial ratio bandwidth using multi-resonant principle, but overall antennas section height
Increased；Three is to increase multiple perturbed structures in radiation patch, forms multiple current paths in chip surface, so that bandwidth is increased
Plus, this method complex structure, design freedom is high.Therefore, design a kind of low section and bandwidth of rejection and axial ratio bandwidth all accord with
The circular polarization microstrip antenna of conjunction demand is significant.
Content of the invention
It is an object of the invention to provide a kind of low section height and circular polarization microstrip antenna of axial ratio bandwidth can be improved.
To achieve these goals, the present invention provides a kind of circular polarization microstrip antenna, including：Medium substrate, including relatively
First surface and second surface；First radiation patch, is attached at the first surface of described medium substrate；Second radiation patch,
It is embedded in described medium substrate, and be arranged in parallel with described first radiation patch；Earth plate, is attached at described medium substrate
Second surface；And coaxial cable, it is arranged in described medium substrate and described second radiation patch to be connected to described first spoke
Penetrate paster.
Alternatively, described second radiation patch is located at 1/2 thickness of described medium substrate.
Alternatively, described first radiation patch is to have the square patch of two the first corner cuts, this two first corner cuts
On the first diagonal of described first radiation patch；Described second radiation patch is to have the square of two the second corner cuts
Paster, this two second corner cuts are located on the first diagonal of described second radiation patch；Described first corner cut and described second
Corner cut is alignd on the thickness direction of described medium substrate.
Alternatively, described first radiation patch offers two circular ports and the class ten being located between this two circular ports
Font hole, described two circular ports are located on the second diagonal of described first radiation patch, and described class cruciform vent includes square
Shape hole and two tri-angle-holed, the center weights of the center of described rectangular opening and described first radiation patch connecting with this rectangular opening
Close, described two tri-angle-holed two long sides being close to described rectangular opening；Two sides are offered on described second radiation patch
Shape hole, this two square openings are located on the second diagonal of described second radiation patch；The center of described circular port and described side
Align on the thickness direction of described medium substrate in the center in shape hole.
Alternatively, the long side of described rectangular opening is parallel with the first diagonal of described first radiation patch, described triangle
Hole is isosceles triangle hole.
Alternatively, a pair of edge of described first radiation patch is respectively formed with that length is identical and different three squares of width
Shape grooving.
Alternatively, described medium substrate and described earth plate are square structure, and the two is equivalently-sized.
Alternatively, described coaxial cable includes inner wire, outer conductor and is arranged on the insulation between inner wire and outer conductor
Layer, described inner wire passes through described medium substrate with described second radiation patch to be connected with described first radiation patch, institute
State outer conductor to be connected with described earth plate.
By technique scheme, the second radiation patch is embedded in medium substrate, is not increasing antenna section height
On the premise of, using the near-field coupling between the first radiation patch and the second radiation patch and two-layer paster, this circular polarisation is micro-
Axial ratio bandwidth with antenna obtains wider lifting.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of description, with following tool
Body embodiment is used for explaining the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the overall structure diagram of the circular polarization microstrip antenna that the present invention provides；
Fig. 2 is the left view of the circular polarization microstrip antenna that the present invention provides；
Fig. 3 is the top view of circular polarization microstrip antenna first radiation patch that the present invention provides；
Fig. 4 is the top view of circular polarization microstrip antenna first radiation patch that the present invention provides；
Fig. 5 is the top view of circular polarization microstrip antenna second radiation patch that the present invention provides；
Fig. 6 is the top view of circular polarization microstrip antenna second radiation patch that the present invention provides；
Fig. 7 is the impedance matching figure of the circular polarization microstrip antenna that the emulation present invention provides；
Fig. 8 is the axle of the circular polarization microstrip antenna that the emulation present invention provides than figure；
Fig. 9 is the directional diagram of the circular polarization microstrip antenna center frequency point that the emulation present invention provides；
Figure 10 is the directional diagram of the circular polarization microstrip antenna center frequency point that the emulation present invention provides.
Specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.It should be appreciated that this place is retouched
The specific embodiment stated is merely to illustrate and explains the present invention, is not limited to the present invention.In the present invention, do not making phase
In the case of anti-explanation, the noun of locality such as " width, length direction, thickness direction " of use typically refers to sit in respective drawings
The direction of " X-axis, Y-axis, Z axis " indication in parameter.
As depicted in figs. 1 and 2, the present invention provides a kind of circular polarization microstrip antenna, including medium substrate 4, the first radiation patch
Piece 1, the second radiation patch 2, earth plate 3 and coaxial cable 5, wherein, this medium substrate 4 be formed with relative first surface and
Second surface, the first radiation patch 1 is attached at the first surface of this medium substrate 4, and the second radiation patch 2 is embedded at medium substrate
In 4, and it be arranged in parallel with the first radiation patch 1, earth plate 3 is attached at the second surface of medium substrate, coaxial cable 5 passes through and is situated between
Matter substrate 4 and the second radiation patch 2, are connected to the first radiation patch 1.By technique scheme, do not increasing antenna section
On the premise of height, using the near-field coupling between two-layer radiation patch and paster to expand the axial ratio bandwidth of antenna, this circle
Polarization micro-strip antenna can produce the axle with three resonance peaks than curve in wider frequency band range, and circularly polarised wave rotation
To consistent, compared with the antenna of equal section height, the axial ratio bandwidth of this circular polarization microstrip antenna obtains wider lifting.
Wherein, in embodiments of the present invention, the first radiation patch 1, the second radiation patch 2 and earth plate 3 is deposited
Copper thickness is SH=0.017mm.Medium substrate 4 and earth plate 3 can be square structure, and the two is equivalently-sized, can
Think 90mm × 90mm.The material of medium substrate 4 can be Rogers R4350B (Rogers R4350B), and electric medium constant is
3.48, relative permeability is 1.0, and loss tangent angle is 0.004, long a width of 90mm, thickness h 0=3mm, and surface is applied copper thickness and is
0.016-0.019mm.Medium substrate 4 adopts this spillage of material angle low, has certain guarantee for radiation efficiency.Second radiation patch
Piece 2 is embedded in medium substrate 4 it is ensured that being be arranged in parallel with the first radiation patch 1, and the first radiation patch 1 and the second radiation patch
Piece 2 is placed in the center of medium substrate 4, further, in order to ensure the coupling between two-layer radiation patch more preferably, will
Second radiation patch 2 is embedded at 1/2 thickness of medium substrate 4.
Wherein, in embodiments of the present invention, as shown in Figure 3 and Figure 4, the first radiation patch 1 is to have two first
The square patch of corner cut 11, this two the first corner cuts 11 are located on the first diagonal of the first radiation patch 1, and length of corner cut is
S1=6.5mm, the perturbation being produced in the first radiation patch 1 using two the first corner cuts 11, is encouraged simultaneously in the first radiation patch 1
Produce degenerate mode to separate, and then produce the higher circular polarisation of a frequency；Additionally, being further opened with two in the first radiation patch 1
Circular port 12 and the class cruciform vent 13 being located between this two circular ports 12, two circular ports 12 are located at the first radiation patch 1
The second diagonal on, distance of center circle the first radiation patch 1 center is respectively x1=9.37mm, x2=13.87mm, two circular port
12 radius is patch2r=4.11mm.Such cruciform vent 13 is located at the center of the first radiation patch 1, two circular ports
The distance in the first radiation patch for 12 center of circle is unequal, opens up class cross bore 13 and circular port in the first radiation patch
12, the entelechy ripple close in order to produce another frequency, to realize between the first radiation patch 1 and the second radiation patch 2
Near-field coupling, class cruciform vent 13 can increase the degree of freedom of design, adjusts in order to more preferable；Specifically, such cruciform vent
13 include rectangular opening 131 and two tri-angle-holed 132 connected, the center of rectangular opening 131 and the first radiation with this rectangular opening 131
The center superposition of paster 1, two tri-angle-holed 132 two long sides being close to rectangular opening 131, and two tri-angle-holed 132 edges
The position on the long side of rectangular opening 131 is arbitrary, and its position is not fixed；The of the long side of rectangular opening 131 and the first radiation patch 1
A pair of linea angulata is parallel, and tri-angle-holed 132 can be isosceles triangle hole.The length and width of above-mentioned rectangular opening 131 are respectively slotx=
The a length of slotx2=4.24mm of waist of 15.96mm, sloty=6.2mm, two tri-angle-holed 132, two tri-angle-holed 132 tight
It is attached to the long side of rectangular opening 131 and be respectively move1=1.7mm and -1.7mm away from rectangular opening 131 center.First radiation patch 1
A pair of edge on be respectively formed with that length is identical and different three rectangular cut 14 of width, and the width of intermediate rectangular grooving is big
In the width of both sides rectangular cut, so can increase the path of electric current, reduce the size of the first radiation patch 1, specifically, three
The length of individual rectangular cut 14 is the 1/7 of institute's trimming length of side, and width is respectively a1=2mm, a2=3.3mm, a3=2mm.
Wherein, in embodiments of the present invention, as shown in Figure 5 and Figure 6, in the same manner, the second radiation patch 2 is to have two
The square patch of individual second corner cut 21, this two the second corner cuts 21 are located on the first diagonal of the second radiation patch 2, corner cut
Length can be SS1=4.8mm, produces the relatively low circle of a frequency using the perturbation that corner cut produces in the second radiation patch 2
Polarize, and the first corner cut 11 is alignd with the second corner cut 21 on the thickness direction of medium substrate 4, to ensure the circular polarisation rotation being formed
To identical it is ensured that whole band limits circular polarisation rotation direction is consistent；Additionally, two square openings 22 are offered on the second radiation patch 2
The circular hole 23 not of uniform size with two, this two square openings 22 are located on the second diagonal of the second radiation patch 2, and two sides
The diagonal in shape hole 22 is mutually perpendicular to the adjacent both sides of the second radiation patch 2, the diagonal line length patch3r of two square openings 22
=3.82mm, two circular hole 23 radiuses not of uniform size are respectively r3=0.9mm, r4=1.5mm.And first radiation patch 1 two
Alignd on the thickness direction of medium substrate 4 with the center of the square opening 22 of the second radiation patch 2 in the center of individual circular port 12.On
State the hole being opened in radiation patch to be used to assist the near-field coupling between the first radiation patch 1 and the second radiation patch 2.?
In other embodiment, two circular ports 12 of the first radiation patch 1 can also be square opening 22 phase with the second radiation patch 2
Corresponding square opening, or the square opening 22 of the second radiation patch 2 can also be two circular ports 12 with the first radiation patch 1
With respect to the corresponding circular port of square opening；In addition, two circular holes 23 not of uniform size are used for feeding in the second radiation patch 2
The passing through of line, its center of circle and diameter need to determine according to the external diameter of the inner wire 51 of the position of feed point and coaxial cable 5.
Wherein, in embodiments of the present invention, coaxial cable 5 includes inner wire 51 and outer conductor 52 inner wire 51 passes through
With the second radiation patch 2 to be connected with the first radiation patch 1, outer conductor 52 is connected medium substrate 4 with earth plate 3, coaxially
The inner wire of cable is cylinder, and radius is 0.6-0.7mm, and outer conductor is hollow cylinder.In the present invention using high-frequency electromagnetic
Simulation software HFSS13.0 carries out simulation analysis, obtains this antenna each parameters optimal size such as following table institute after simulation analysis
Show：
Table 1. present invention each parameters optimal size table
Concrete dimensional parameters according to above-mentioned antenna sections are emulated using high-frequency electromagnetic simulation software HFSS13.0
Analysis, the S to circular polarization microstrip antenna11Parameter and 3dB axle are analyzed than parameter, and its result is as follows：As shown in fig. 7, should
In -10dB, impedance bandwidth is 43MHz to circular polarization microstrip antenna, and relative bandwidth is 2.7%, and frequency range is 1.571GHz-
, there is frequency 1.577GHz, 1.591GHz and 1.608GHz at three in 1.614GHz, these three resonance frequencies are respectively from first
The spoke of the near-field coupling of radiation patch 1 and the second radiation patch 2, the radiation of the second radiation patch 2 and the first radiation patch 1
Penetrate.As shown in figure 8, there is frequency 1.578GHz, 1.595Ghz and 1.611GHz at three, 3dB in above-mentioned circular polarization microstrip antenna
Axial ratio bandwidth is 37.1MHz, and axial ratio bandwidth relatively is 1.576GHz-1.613GHz for 2.33%, 3dB axle than frequency range, is
The twice of equal section height circular polarized antenna axial ratio bandwidth, and in whole frequency range, circular polarisation rotation direction is consistent, is dextrorotation.Figure
9 and Figure 10 is the directional diagram of above-mentioned circular polarization microstrip antenna center frequency point 1.595GHz, as illustrated, the E face of antenna and H face
Directional diagram is similar, and ratio has 14dBi in front and back.Additionally, antenna is much larger than left-handed gain in the dextrorotation gain of this frequency, belong to dextrorotation
Circular polarisation.In addition, above-mentioned circular polarization microstrip antenna is fed by way of coaxial bottom is presented, feeding classification is simple, and this sky
Line structure is simply compact and easy to process.
Describe the preferred embodiment of the present invention above in association with accompanying drawing in detail, but, the present invention is not limited to above-mentioned reality
Apply the detail in mode, in the range of the technology design of the present invention, multiple letters can be carried out to technical scheme
Monotropic type, these simple variant belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to various can
The compound mode of energy no longer separately illustrates.
Additionally, combination in any can also be carried out between the various different embodiment of the present invention, as long as it is without prejudice to this
The thought of invention, it equally should be considered as content disclosed in this invention.
Claims (8)
1. a kind of circular polarization microstrip antenna is it is characterised in that include：
Medium substrate, including relative first surface and second surface；
First radiation patch, is attached at the first surface of described medium substrate；
Second radiation patch, is embedded in described medium substrate, and be arranged in parallel with described first radiation patch；
Earth plate, is attached at the second surface of described medium substrate；And
Coaxial cable, is arranged in described medium substrate and described second radiation patch to be connected to described first radiation patch.
2. circular polarization microstrip antenna according to claim 1 it is characterised in that described second radiation patch be located at given an account of
At 1/2 thickness of matter substrate.
3. circular polarization microstrip antenna according to claim 1 is it is characterised in that described first radiation patch is to have two
The square patch of the first corner cut, this two first corner cuts are located on the first diagonal of described first radiation patch；
Described second radiation patch is to have the square patch of two the second corner cuts, and this two second corner cuts are located at described second
On first diagonal of radiation patch；
Described first corner cut is alignd on the thickness direction of described medium substrate with described second corner cut.
4. circular polarization microstrip antenna according to claim 3 is it is characterised in that offer two in described first radiation patch
Individual circular port and the class cruciform vent being located between this two circular ports, described two circular ports are located at described first radiation patch
The second diagonal on, described class cruciform vent includes rectangular opening and two tri-angle-holed, the described squares connecting with this rectangular opening
The center in shape hole and the center superposition of described first radiation patch, described two tri-angle-holed be close to described rectangular opening two
Long side；
Two square openings and two circular holes not of uniform size are offered on described second radiation patch, this two square openings are located at institute
State on the second diagonal of the second radiation patch；
Alignd on the thickness direction of described medium substrate with the center of described square opening in the center of described circular port.
5. circular polarization microstrip antenna according to claim 4 is it is characterised in that the long side of described rectangular opening and described first
First diagonal of radiation patch is parallel, described tri-angle-holed for isosceles triangle hole.
6. circular polarization microstrip antenna according to claim 3 is it is characterised in that an opposite side of described first radiation patch
It is respectively formed with edge that length is identical and different three rectangular cut of width.
7. circular polarization microstrip antenna according to claim 1 is it is characterised in that described medium substrate and described earth plate are
Square plate, and the two is equivalently-sized.
8. circular polarization microstrip antenna according to claim 1 is it is characterised in that described coaxial cable includes inner wire with outward
Conductor, described inner wire passes through described medium substrate with described second radiation patch to be connected with described first radiation patch,
Described outer conductor is connected with described earth plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610783535.XA CN106450777A (en) | 2016-08-31 | 2016-08-31 | Circular polarization microstrip antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610783535.XA CN106450777A (en) | 2016-08-31 | 2016-08-31 | Circular polarization microstrip antenna |
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Cited By (5)
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|---|---|---|---|---|
| CN107732442A (en) * | 2017-09-13 | 2018-02-23 | 华南理工大学 | A kind of implanted circular polarized antenna applied to Wireless Medical Telemetry |
| CN110233335A (en) * | 2019-05-09 | 2019-09-13 | 哈尔滨工业大学 | Miniaturization low section dual polarized antenna based on artificial magnetic conductor |
| CN112803165A (en) * | 2020-12-30 | 2021-05-14 | 无锡国芯微电子系统有限公司 | Novel broadband single-layer patch antenna |
| CN114614260A (en) * | 2022-02-24 | 2022-06-10 | 西安电子科技大学 | Broadband circularly polarized microstrip antenna with slotted bottom plate and satellite communication terminal |
| CN115275619A (en) * | 2022-08-29 | 2022-11-01 | 重庆大学 | Compact structure's miniature circular polarized antenna of semicircle |
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Cited By (7)
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|---|---|---|---|---|
| CN107732442A (en) * | 2017-09-13 | 2018-02-23 | 华南理工大学 | A kind of implanted circular polarized antenna applied to Wireless Medical Telemetry |
| CN107732442B (en) * | 2017-09-13 | 2023-11-17 | 华南理工大学 | Implantable circularly polarized antenna applied to wireless medical telemetry |
| CN110233335A (en) * | 2019-05-09 | 2019-09-13 | 哈尔滨工业大学 | Miniaturization low section dual polarized antenna based on artificial magnetic conductor |
| CN112803165A (en) * | 2020-12-30 | 2021-05-14 | 无锡国芯微电子系统有限公司 | Novel broadband single-layer patch antenna |
| CN114614260A (en) * | 2022-02-24 | 2022-06-10 | 西安电子科技大学 | Broadband circularly polarized microstrip antenna with slotted bottom plate and satellite communication terminal |
| CN115275619A (en) * | 2022-08-29 | 2022-11-01 | 重庆大学 | Compact structure's miniature circular polarized antenna of semicircle |
| CN115275619B (en) * | 2022-08-29 | 2024-05-10 | 重庆大学 | Semi-circular miniaturized circularly polarized antenna with compact structure |
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