CN109994827A - Slot-coupled circular polarized antenna based on super surface - Google Patents
Slot-coupled circular polarized antenna based on super surface Download PDFInfo
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- CN109994827A CN109994827A CN201711485571.9A CN201711485571A CN109994827A CN 109994827 A CN109994827 A CN 109994827A CN 201711485571 A CN201711485571 A CN 201711485571A CN 109994827 A CN109994827 A CN 109994827A
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- rectangle
- dielectric plate
- super surface
- slot
- circular polarized
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—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
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
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Abstract
The present invention discloses a kind of slot-coupled circular polarized antenna based on super surface, including top dielectric plate, metal and layer dielectric plate, metal it is arranged between top dielectric plate and layer dielectric plate, the upper surface of top dielectric plate is provided with super surface, it is etched with to metal the cross gap an of hollow out, the lower surface of layer dielectric plate is provided with feed layer.Super surface is made of 16 4 × 4 rectangle junior units, is respectively provided with spaced slot between each rectangle junior unit, and the side length of each rectangle junior unit is respectively less than 1/10th wavelength；Feed layer is made of four L shape feeder lines, and clearance distance, four input ports of the long side of four L shape feeder lines as antenna are equipped between the L shape feeder line that the short side of each L shape feeder line is arranged in a mutually vertical manner and two are parallel to each other.The present invention so that antenna increases a resonance point, and then has broadened the beamwidth of antenna by the way that a super surface is arranged on top dielectric plate.
Description
Technical field
The present invention relates to technical field of satellite communication more particularly to a kind of slot-coupled circular polarisation days based on super surface
Line.
Background technique
The phase between satellite and ground may be implemented as very important a part in satellite system composition in antenna system
Mutual communication and ground are in face of the transmission etc. of remote control and the telemetry command of satellite, and therefore, the stability and reliability of antenna system are very
Determine whether satellite can the scheduled task of successful execution in big degree, it can be seen that the superiority and inferiority of antenna performance is to navigation system
Performance has tremendous influence.So the design of satellite antenna also becomes a vital research topic.Industry is it is found that circle
Poliarizing antenna can reduce the loss in ionosphere with the influence of anti-multipath fading.Moreover, to the position of receiving antenna and transmitting antenna
It puts and does not require, so circular polarized antenna is well suited for using in mobile communications.Currently, the research of circular polarized antenna increasingly by
To concern, the very heated handful of circular polarized antenna being especially applied in the compatible satellite navigation of multisystem.However, existing circular polarisation day
The beamwidth of antenna characteristic of line is bad, therefore the beamwidth of antenna characteristic up for further improving circular polarized antenna.
Summary of the invention
The main object of the present invention provides a kind of slot-coupled circular polarized antenna based on super surface, it is intended to solve existing circle
The bad technical problem of the beamwidth of antenna characteristic of poliarizing antenna.
To achieve the above object, the present invention provides a kind of slot-coupled circular polarized antenna based on super surface, including it is upper
Layer dielectric-slab, metal and layer dielectric plate, be arranged between top dielectric plate and layer dielectric plate to the metal, it is described
The upper surface of top dielectric plate is provided with super surface, is etched with to the metal the empty cross gap of thread, the lower layer
The lower surface of dielectric-slab is provided with feed layer, in which: and the super surface is made of 16 4 × 4 rectangle junior units, each
A spaced slot is provided between rectangle junior unit, the side length of each rectangle junior unit is respectively less than 1/10th waves
Long, each rectangle junior unit is rectangle copper sheet；The feed layer is made of four L shape feeder lines, and each L shape feeder line is by square
Shape copper sheet is made, and gap is equipped between the L shape feeder line that the short side of each L shape feeder line is arranged in a mutually vertical manner and two are parallel to each other
Distance, four input ports of the long side of four L shape feeder lines as antenna；It is made of rectangle copper sheet to the metal, it is described
The rectangle copper sheet of rectangle junior unit, the rectangle copper sheet of L shape feeder line, metal ground rectangle copper sheet thickness it is all the same.
Preferably, described 16 4 × 4 rectangle junior units include four the first rectangle junior units, eight the second rectangles
Junior unit and four third rectangle junior units, each corner on the super surface is respectively by a first rectangle junior unit structure
At being set side by side two the second rectangle junior units between every two the first rectangle junior unit, four third rectangle junior units settings
In the rectangle that eight the second rectangle junior units surround.
Preferably, the length of the first rectangle junior unit is L1=12.55, width W1=12.55；The super surface
The length of four the second rectangle junior units in the left and right sides be L2=10.3, width is W1=12.55, the super surface
The length of four the second rectangle junior units in upper and lower two sides is L2=10.3, width is W1=12.55；Third rectangle junior unit
Length be L2=10.3, width W2=10.3.
Preferably, the cross gap is made of two empty rectangular apertures of thread, the length L of each rectangular apertures
=22.8mm, width Ws=3.2mm.
Preferably, the long side of the L shape feeder line is La=36.82, short side Lb=8.9mm, width Wf=2.18mm,
Clearance distance between the short side of two L shape feeder lines being parallel to each other is S=6mm.
Preferably, the rectangle copper sheet on the metal ground with a thickness of 35 μm.
Preferably, the center of the upper surface of top dielectric plate is arranged in the super surface, and the cross gap is carved
In the center of layer dielectric plate, the center of the lower surface of layer dielectric plate is arranged in the feed layer for erosion.
Preferably, plate used by the top dielectric plate be RO5880, dielectric constant 2.2, thickness H1For
3.038mm。
Preferably, plate used by the layer dielectric plate be RO5880, dielectric constant 2.2, thickness H2For
1.524mm。
Preferably, the top dielectric plate, metal and layer dielectric plate be the equal rectangle of side length, the rectangle
Length is L=84mm, width W=84mm.
Compared to the prior art, the slot-coupled circular polarized antenna of the present invention based on super surface is by introducing super table
Face so that antenna increases a resonance point, and then has broadened the beamwidth of antenna.In addition, four L shape feeder lines for constituting feed layer are mutual
Be vertically arranged so that four input ports are symmetrical, the signal amplitude of each input port input is identical and phase according to
Secondary 90 degree of difference, not only makes antenna have good directional characteristic and circular polarization characteristics, it is weak can to effectively antagonize signal multipath
Effect, and there is good antenna gain.
Detailed description of the invention
Fig. 1 is the schematic perspective view of the slot-coupled circular polarized antenna preferred embodiment the present invention is based on super surface；
Fig. 2 is the structural schematic diagram on the super surface being arranged on top dielectric plate；
Fig. 3 is the structural schematic diagram on the metal ground being arranged between top dielectric plate and layer dielectric plate；
Fig. 4 is the structural schematic diagram that the feed layer of layer dielectric plate lower surface is arranged in；
Fig. 5 is the emulation schematic diagram of the reflection coefficient of the slot-coupled circular polarized antenna the present invention is based on super surface；
Fig. 6 is emulation schematic diagram of the axis than result of the slot-coupled circular polarized antenna the present invention is based on super surface.
The object of the invention is realized, functional characteristics and advantage will will join together in specific embodiment part in conjunction with the embodiments
It is described further according to attached drawing.
Specific embodiment
Further to illustrate the technical means and efficacy of the invention taken to reach above-mentioned purpose, below in conjunction with attached drawing
And preferred embodiment, a specific embodiment of the invention, structure, feature and its effect are described in detail.It should be appreciated that this
Locate described specific embodiment to be only used to explain the present invention, be not intended to limit the present invention.
Shown in referring to Fig.1, Fig. 1 is the solid of the slot-coupled circular polarized antenna preferred embodiment the present invention is based on super surface
Structural schematic diagram.In the present embodiment, the slot-coupled circular polarized antenna based on super surface includes top dielectric plate 11, gold
Possession 12 and layer dielectric plate 13,12 lower surface and the layer dielectric plates 13 that top dielectric plate 11 is set of metal ground
Between upper surface.In the present embodiment, plate used by the top dielectric plate 11 be RO5880, it is dielectric constant 2.2, thick
Spend H1For 3.038mm.Plate used by the layer dielectric plate 13 is RO5880, dielectric constant 2.2, thickness H2For
1.524mm.The metal 12 be rectangle copper sheet, with a thickness of 35 μm.Top dielectric plate 11, metal 12 and layer dielectric plate
13 be the equal rectangle of side length, it is preferable that the length of the rectangle is L=84mm, width W=84mm.The top dielectric
Plate 11 and metal between 12 and metal be all made of seamless overlapped way between 12 and layer dielectric plate 13 and be arranged one
Rise, the seamless overlapped way with referring to the top dielectric plate 11 and metal between 12 and metal 12 and layer dielectric
There is no air or the filling of other foams between plate 13, but directly contacts the mode of setting.Fig. 1 is by top dielectric plate 11, metal
The distance between ground 12, layer dielectric plate 13 have been unfolded, so as to clearly show the structure between each component part of antenna.
In the present embodiment, the upper surface of the top dielectric plate 11 is provided with a super surface 10, specifically, described super
The center of the upper surface of top dielectric plate 11 is arranged in surface 10.12 it is etched with the empty cross of thread to the metal
Gap 120, specifically, the cross gap 120 are etching in the center of layer dielectric plate 13.The layer dielectric plate 13
Lower surface be provided with feed layer 130, specifically, the centre bit of the lower surface of layer dielectric plate 13 is arranged in the feed layer 130
It sets.It is understood that the super surface 10 also can be set the other positions in the upper surface of top dielectric plate 11, described ten
Cabinet frame gap 120 can also etch the other positions in layer dielectric plate 13, and the feed layer 130 also can be set in layer dielectric
The other positions of the lower surface of plate 13, but that respective center is not arranged is good for the feed performance of antenna.Therefore, this implementation
Example is by the central point O on super surface 101, super surface 10 central point O2With the central point O of feed layer 1303It is vertical to be in same
In the broad-band slot coupling circular polarized antenna center perpendicular bisector on, to promote the feed performance of antenna.
Refering to what is shown in Fig. 2, Fig. 2 is the structural schematic diagram on the super surface 10 being arranged on top dielectric plate 11.In this implementation
In example, the super surface 10 is made of 16 4 × 4 rectangle junior units, each rectangle junior unit is rectangle copper sheet, should
The thickness of rectangle copper sheet with metal 12 thickness it is identical, be 35 μm.Interval is provided between each rectangle junior unit
Gap, the spaced slot are preferably g=3.2mm, and the side length of each rectangle junior unit is respectively less than 1/10th wavelength.It is described
Super surface 10 is a square, it is preferable that the side length of the square is Lp=48.4mm.16 4 × 4 rectangles are small
Unit includes four the first rectangle junior units, eight the second rectangle junior units and four third rectangle junior units, the super table
Each corner in face 10 is made of a first rectangle junior unit respectively, is set side by side two between every two the first rectangle junior unit
A second rectangle junior unit, four third rectangle junior units constitute the middle position that super surface 10 is arranged in a rectangle, it may be assumed that four
A third rectangle junior unit is arranged in the rectangle that eight the second rectangle junior units surround.Preferably, the first rectangle junior unit
Length is L1=12.55, width W1=12.55；Wherein, the length of four the second rectangle junior units in the left and right sides is L2=
10.3, width is W1=12.55, the length of four the second rectangle junior units in upper and lower two sides is L2=10.3, width is W1
=12.55；The length of third rectangle junior unit is L2=10.3, width W2=10.3.Antenna of the present invention is by introducing
Super surface 10 so that antenna increases a resonance point, and then has broadened the beamwidth of antenna.
Refering to what is shown in Fig. 3, Fig. 3 be the metal being arranged between top dielectric plate 11 and layer dielectric plate 13 12 structure
Schematic diagram.In the present embodiment, it 12 is made of rectangle copper sheets to the metal, it is preferred that the length L=of the rectangle copper sheet
84mm, width W=84mm, with a thickness of 35 μm；The metal 12 center be etched with the empty cross seam of a thread
Gap 120, the cross gap 120 are made of two empty rectangular apertures of thread, it is preferable that the length L of each rectangular apertures=
22.8mm, width Ws=3.2mm.
Refering to what is shown in Fig. 4, Fig. 4 is the structural schematic diagram that the feed layer 130 of 13 lower surface of layer dielectric plate is arranged in.At this
In example, the center of 13 lower surface of layer dielectric plate is arranged in the feed layer 130, which is presented by four L shapes
Line composition, each L shape feeder line have rectangle copper sheet to be made, the thickness of the rectangle copper sheet with metal 12 thickness it is identical,
It is 35 μm.Preferably, the long side of each L shape feeder line is La=36.82, short side Lb=8.9mm, width Wf=2.18mm.
The clearance distance between L shape feeder line that the short side of each L shape feeder line is arranged in a mutually vertical manner and two are parallel to each other, the clearance gap
From preferably S=6mm.The long side of four L shape feeder lines is defeated as broad-band slot of the present invention coupling four of circular polarized antenna
Inbound port P1、P2、P3And P4.In the present embodiment, by giving four input port P1、P2、P3And P4The broad-band slot is given respectively
Circular polarized antenna feed-in (input) amplitude is identical for coupling, phase successively differs 90 ° of signal, the broad-band slot coupling circular polarisation
Antenna can radiate circular polarisation electromagnetic wave.In the present embodiment, if giving four input port P1、P2、P3And P4Apply phase respectively
Position is 0 °, and -90 °, -180 °, -270 ° of signal, then broad-band slot coupling circular polarized antenna of the present invention is right-handed circular polarization
Antenna；If giving four input port P1、P2、P3And P4Applying phase respectively is 0 °, 90 °, 180 °, and 270 ° of signal, then this hair
The bright broad-band slot coupling circular polarized antenna is exactly left-hand circular polarization antenna.Since the signal amplitude of each port input is identical
And phase successively differs 90 degree, so broad-band slot coupling circular polarized antenna has good antenna direction characteristic and entelechy
Change characteristic, the weak effect of signal multipath can be effectively antagonized.
Referring again to Fig. 1, the feed layer 130, layer dielectric plate 13 and the metal with cross gap 120 12 constitute
Slot-coupled antenna, therefore of the present invention passed through by a slot-coupled based on the slot-coupled circular polarized antenna on super surface
The super surface 10 of antenna and one 4 × 4 rectangle junior unit composition forms.Wherein, when to four input port P1、P2、P3And P4
Applying phase respectively is 0 °, and -90 °, -180 °, the feed layer 130 of -270 ° of signal, four L shape feeder lines composition is fed to antenna
It is converted into electromagnetic wave, electromagnetic wave by the metal in slot-coupled antenna 12 is coupled on super surface 10, then will by super surface 10
Electromagnetic wave energy is radiate.
Referring to Figure 5, Fig. 5 is the emulation of the reflection coefficient of the slot-coupled circular polarized antenna the present invention is based on super surface
Schematic diagram.In the present embodiment, the reflection coefficient (| S11 |) of circular polarized antenna is coupled to broad-band slot by electromagnetic simulation software
It is emulated, as shown in figure 5, available, the present invention is based on the S parameter curves of the slot-coupled circular polarized antenna on super surface.Ginseng
It examines shown in Fig. 5, is in 2.96GHz to 4.16GHz in working frequency range, the reflection coefficient of antenna (| S11 |) is in -10dB hereinafter, saying
The relative bandwidth of the bright slot-coupled circular polarized antenna provided by the invention based on super surface can achieve 33.7%, to realize
The broadband character of antenna.
Referring to shown in Fig. 6, Fig. 6 is emulation of the axis than result of the slot-coupled circular polarized antenna the present invention is based on super surface
Schematic diagram.In the present embodiment, it is emulated by the axis ratio that electromagnetic simulation software couples circular polarized antenna to broad-band slot, such as
Shown in Fig. 6, the available axis the present invention is based on the slot-coupled circular polarized antenna on super surface compares result curve.With reference to Fig. 6 institute
Show, is in 2.4GHz to 5.9GHz in working frequency range, the axis of antenna illustrates provided by the invention based on super table than being both less than 3dB
The slot-coupled circular polarized antenna in face has good circular polarisation performance in working frequency range.
Due to it is of the present invention based on the slot-coupled circular polarized antenna on super surface by introducing super surface 10 so that day
Line increases a resonance point, and then has broadened the beamwidth of antenna.In addition, four L shape feeder lines for constituting feed layer 13 are mutually perpendicular to set
It sets, so that four input ports are symmetrical, the signal amplitude of each input port input is identical and phase successively differs
90 degree, not only makes antenna of the present invention that there are good directional characteristic and circular polarization characteristics, signal multipath can be effectively antagonized
Weak effect, and there is good antenna gain.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure made by bright specification and accompanying drawing content or equivalent function transformation, are applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of slot-coupled circular polarized antenna based on super surface, including top dielectric plate, metal and layer dielectric plate,
It is arranged between top dielectric plate and layer dielectric plate to the metal, which is characterized in that the upper surface of the top dielectric plate
It is provided with super surface, is etched with to the metal the empty cross gap of thread, the lower surface setting of the layer dielectric plate
There is feed layer, in which:
The super surface is made of 16 4 × 4 rectangle junior units, is provided between one between each rectangle junior unit
Space gap, the side length of each rectangle junior unit are respectively less than 1/10th wavelength, each rectangle junior unit is rectangle copper
Piece；
The feed layer is made of four L shape feeder lines, and each L shape feeder line is made of rectangle copper sheet, each L shape feeder line it is short
While being arranged in a mutually vertical manner and being equipped with clearance distance between L shape feeder line that two are parallel to each other, the long side of four L shape feeder lines is as day
Four input ports of line；
It is made of rectangle copper sheet to the metal, rectangle copper sheet, the gold of the rectangle copper sheet of the rectangle junior unit, L shape feeder line
The thickness of the rectangle copper sheet in possession is all the same.
2. as described in claim 1 based on the slot-coupled circular polarized antenna on super surface, which is characterized in that described 16 4
× 4 rectangle junior unit includes four the first rectangle junior units, eight the second rectangle junior units and four small lists of third rectangle
Member, each corner on the super surface are made of a first rectangle junior unit respectively, between every two the first rectangle junior unit
Two the second rectangle junior units are set side by side, the square that eight the second rectangle junior units surround is arranged in four third rectangle junior units
In shape.
3. as claimed in claim 2 based on the slot-coupled circular polarized antenna on super surface, which is characterized in that first rectangle
The length of junior unit is L1=12.55, width W1=12.55；The second rectangle junior unit of the left and right sides four on the super surface
Length be L2=10.3, width is W1=12.55, the second rectangle junior unit of two sides up and down four on the super surface
Length is L2=10.3, width is W1=12.55；The length of third rectangle junior unit is L2=10.3, width W2=
10.3。
4. as described in claim 1 based on the slot-coupled circular polarized antenna on super surface, which is characterized in that the cross seam
Gap is made of two empty rectangular apertures of thread, the length L of each rectangular apertures=22.8mm, width Ws=3.2mm.
5. as described in claim 1 based on the slot-coupled circular polarized antenna on super surface, which is characterized in that the L shape feeder line
Long side be La=36.82, short side Lb=8.9mm, width Wf=2.18mm, the short side of two L shape feeder lines being parallel to each other
Between clearance distance be S=6mm.
6. as described in claim 1 based on the slot-coupled circular polarized antenna on super surface, which is characterized in that the metal ground
Rectangle copper sheet with a thickness of 35 μm.
7. such as the slot-coupled circular polarized antenna as claimed in any one of claims 1 to 6 based on super surface, which is characterized in that institute
The center that the upper surface of top dielectric plate is arranged in super surface is stated, the cross gap etching is in layer dielectric plate
The center of the lower surface of layer dielectric plate is arranged in heart position, the feed layer.
8. as claimed in claim 7 based on the slot-coupled circular polarized antenna on super surface, which is characterized in that the top dielectric
Plate used by plate is RO5880, dielectric constant 2.2, thickness H1For 3.038mm.
9. as claimed in claim 8 based on the slot-coupled circular polarized antenna on super surface, which is characterized in that the layer dielectric
Plate used by plate is RO5880, dielectric constant 2.2, thickness H2For 1.524mm.
10. as claimed in claim 7 based on the slot-coupled circular polarized antenna on super surface, which is characterized in that the upper layer is situated between
Scutum, metal and layer dielectric plate be the equal rectangle of side length, the length of the rectangle is L=84mm, width W=
84mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711485571.9A CN109994827A (en) | 2017-12-30 | 2017-12-30 | Slot-coupled circular polarized antenna based on super surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711485571.9A CN109994827A (en) | 2017-12-30 | 2017-12-30 | Slot-coupled circular polarized antenna based on super surface |
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| Publication Number | Publication Date |
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| CN109994827A true CN109994827A (en) | 2019-07-09 |
Family
ID=67110990
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| CN201711485571.9A Pending CN109994827A (en) | 2017-12-30 | 2017-12-30 | Slot-coupled circular polarized antenna based on super surface |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110854527A (en) * | 2019-11-07 | 2020-02-28 | 电子科技大学 | Dual-polarized high-performance broadband antenna based on super surface and array thereof |
| CN112332079A (en) * | 2020-03-13 | 2021-02-05 | 华南理工大学 | Double-linear polarization double-beam base station antenna based on super surface |
| CN112615148A (en) * | 2020-12-08 | 2021-04-06 | 南京邮电大学 | Ultra-wideband circularly polarized super-surface antenna based on novel hybrid feed network |
| CN114243302A (en) * | 2021-12-01 | 2022-03-25 | 西北工业大学 | Low-profile dual-circular-polarization broadband antenna based on super-surface structure |
| CN115173074A (en) * | 2022-07-11 | 2022-10-11 | 河海大学 | Broadband compact circularly polarized antenna based on super surface and method |
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2017
- 2017-12-30 CN CN201711485571.9A patent/CN109994827A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110854527A (en) * | 2019-11-07 | 2020-02-28 | 电子科技大学 | Dual-polarized high-performance broadband antenna based on super surface and array thereof |
| CN112332079A (en) * | 2020-03-13 | 2021-02-05 | 华南理工大学 | Double-linear polarization double-beam base station antenna based on super surface |
| CN112332079B (en) * | 2020-03-13 | 2021-11-19 | 华南理工大学 | Double-linear polarization double-beam base station antenna based on super surface |
| CN112615148A (en) * | 2020-12-08 | 2021-04-06 | 南京邮电大学 | Ultra-wideband circularly polarized super-surface antenna based on novel hybrid feed network |
| CN112615148B (en) * | 2020-12-08 | 2023-06-20 | 南京邮电大学 | Ultra-wideband circularly polarized super-surface antenna based on novel hybrid feed network |
| CN114243302A (en) * | 2021-12-01 | 2022-03-25 | 西北工业大学 | Low-profile dual-circular-polarization broadband antenna based on super-surface structure |
| CN115173074A (en) * | 2022-07-11 | 2022-10-11 | 河海大学 | Broadband compact circularly polarized antenna based on super surface and method |
| CN115173074B (en) * | 2022-07-11 | 2024-06-21 | 河海大学 | Broadband compact circularly polarized antenna based on super surface and method |
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