CN106450793B - A kind of broadband selective wave transparent polarization regulation electromagnetic structure - Google Patents
A kind of broadband selective wave transparent polarization regulation electromagnetic structure Download PDFInfo
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- CN106450793B CN106450793B CN201610817911.2A CN201610817911A CN106450793B CN 106450793 B CN106450793 B CN 106450793B CN 201610817911 A CN201610817911 A CN 201610817911A CN 106450793 B CN106450793 B CN 106450793B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/24—Polarising devices; Polarisation filters
- H01Q15/242—Polarisation converters
Abstract
The invention belongs to technical field of electronic materials, a kind of broadband selective wave transparent polarization regulation electromagnetic structure is provided, the structure includes 5 layers altogether, surface layer and bottom are the metal openings resonant ring of identical size and opening direction is mutually perpendicular to, middle layer is metal dipole, is medium substrate between metal dipole and resonant ring；Diagonally, the metal dipole long axis direction and resonant ring opening direction are in 45 ° of angles to the metal openings resonant ring opening direction.Electromagnetic structure of the present invention has the function of asymmetric transmission characteristic and asymmetric wave transparent, and the simple maturation of preparation process, strong operability, cost is relatively low；The structure is to be able to maintain higher polarization conversion rate, wider polarization conversion frequency band and stable selective wave transparent working frequency range within the scope of 0 ° to 30 ° in incident angle simultaneously.
Description
Technical field
The invention belongs to technical field of electronic materials, are related to electromagnetic structure design, specially a kind of broadband selective wave transparent
Polarization regulation electromagnetic structure.
Background technique
Polarized state is a very important feature of electromagnetic wave, can be to detection target using polarization of electromagnetic wave performance
It identified, encoded and is sampled；Polarization of electromagnetic wave regulation has obtained extensively in high-tech areas such as communication, navigation and radars
Application.Regulation polarization of electromagnetic wave state is always that people want the important goal realized, can regulate and control electromagnetism in nature
The medium of wave polarization state is very limited, and inefficiency.Therefore, polarization of electromagnetic wave state one is controlled by manual method
It is directly that people want the target realized.
Manual electromagnetic structure has become a kind of ideal material that can regulate and control polarization of ele characteristic, passes through artificial electricity
The design of magnetic structure basic cell structure may be implemented to regulate and control polarization of electromagnetic wave.Traditional transmission-type polarization of ele state
The method of regulation includes grating regulation, two color crystal controls and is realized by birefringence effect；But the pole of this type
Change regulation electromagnetic structure and needs complicated design and biggish structural thickness to change the phase of electromagnetic wave to reach polarization regulation
Purpose.Currently, the generally existing polarization of existing polarization regulation electromagnetic structure regulates and controls narrow bandwidth, polarization regulation inefficiency and structure
The problems such as thickness is larger, especially when the incident angle of electromagnetic wave changes, electromagnetic structure is to polarization of electromagnetic wave control
It can extreme degradation.Therefore, reduce structural thickness, carry out the comprehensive polarization of multiple structural forms and regulate and control electromagnetic structure, increase polarization
Regulation bandwidth improves polarization regulation efficiency and improves the technology that the polarization performance of control under incidence angles degree is urgent need to resolve and asks
Topic.
Summary of the invention
It is an object of the invention in view of the deficiency of the prior art, provide a kind of broadband selective wave transparent polarization
Regulate and control electromagnetic structure；The structure have asymmetric transmission characteristic, i.e., when a kind of polarized electromagnetic wave forward entrance with this configuration when,
Polarization conversion occurs for transmitted electromagnetic wave；And when identical polarized electromagnetic wave from it is reversed it is incident with this configuration when, then cannot be by this
Structure, there is a phenomenon where be totally reflected.Meanwhile the structure has the function of asymmetric wave transparent, i.e., when two kinds of polarized wave incidences are by being somebody's turn to do
When structure, in different frequency range polarization conversion occurs for two kinds of electromagnetic waves of transmission；The function can be applied as polarizing control and open
Close-when incidence wave polarized state becomes orthogonal polarisation state, switch is turned on or closes.In addition, the present invention provides polarization
Regulation electromagnetic structure polarization regulation bandwidth, polarization regulation efficiency and in terms of be superior to existing polarization and regulate and control electromagnetism
Structure.
To achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of broadband selective wave transparent polarization regulation electromagnetic structure, which is characterized in that the structure includes 5 layers altogether, surface layer and
Bottom is the metal openings resonant ring of identical size and opening direction is mutually perpendicular to, and middle layer is metal dipole, dipoles scatter
It is medium substrate between son and resonant ring；The metal openings resonant ring opening direction diagonally, the metal pair
Extremely sub- long axis direction and resonant ring opening direction are in 45 ° of angles.
Further, the electromagnetic parameter of the medium substrate are as follows: relative dielectric constant real part range is 3.2~4.6, imaginary part
Range is 0~0.2.
The outside of the metal openings resonant ring is long are as follows: 3.5~6.5mm, inner edge are long are as follows: 0.8~2.0mm, aperture slots
Spacing are as follows: 0.8~1.6mm.
The length of the metal dipole are as follows: 5.0~7.5mm, width are as follows: 1.5~4.5mm.
The period of the polarization regulation electromagnetic structure are as follows: 6.5~8.5mm, structural thickness are as follows: 3.0~6.0mm.
The present invention provides polarization regulation electromagnetic structure and uses PCB (Print Circuit Board, printed circuit board) technique
Periodical metallic pattern array is respectively coated on the medium substrate surface and the back side is formed.
The beneficial effects of the present invention are:
1. the simple maturation of present invention polarization regulation electromagnetic structure manufacture craft, strong operability, cost is relatively low；
2. the present invention polarization regulation electromagnetic structure have Method Based on Asymmetric transfer function, i.e., same polarized wave from positive direction (-
The direction z) it is incident, polarization conversion occurs afterwards with this configuration, when the polarized wave is from negative direction (direction z) incidence, then occurs complete
The phenomenon that reflection；
3. present invention polarization regulation electromagnetic structure has wider polarization conversion frequency band and higher polarization conversion rate；
4. present invention polarization regulation electromagnetic structure has the function of selective wave transparent；
5. present invention polarization regulation electromagnetic structure is to be able to maintain higher polarization within the scope of 0 ° to 30 ° in incident angle
Conversion ratio, wider polarization conversion frequency band and stable selective wave transparent working frequency range；
6. size and structural thickness by reasonably adjusting periodical metallic pattern, present invention is equally suited for other similar
Electromagnetism it is adjusted and controlled.
Detailed description of the invention
Fig. 1 is broadband selective wave transparent of the present invention polarization regulation electromagnetic structure schematic diagram；Wherein, (a) shows for cellular construction
It is intended to, (b) is surface layer resonant ring, (c) be middle layer dipole, (d) is bottom resonant ring；P is periodic cells side length, and 2t is
The overall thickness of structure；The parameter of resonant ring are as follows: a length of a in outside, interior side length b, aperture slots spacing are g；Dipole length is l,
Width is w.
Fig. 2 is the polarization of embodiment 1 regulation electromagnetic structure when electromagnetic wave is incident along the direction-z (positive direction), electromagnetic structure
Transmission coefficient curve；Wherein, transmission coefficient tijSubscript i and j respectively correspond polarized state (i, the j of transmission and incident electromagnetic wave
=u, v), same polarization transmission coefficient tvvAnd tuuIt is overlapped.
Fig. 3 is the polarization of embodiment 1 regulation electromagnetic structure when (opposite direction) is incident in the z-direction for electromagnetic wave, electromagnetic structure
Transmission coefficient curve；Wherein, same polarization transmission coefficient tvvAnd tuuIt is overlapped.
Fig. 4 is that the polarization of embodiment 1 regulates and controls electromagnetic structure in incident angle under the conditions of increasing to 30 ° for 0 °, and electromagnetic wave is along-z
Cross polarization reflection coefficient t when the incidence of directionvuCurve.
Fig. 5 is that the polarization of embodiment 1 regulates and controls electromagnetic structure in incident angle under the conditions of increasing to 30 ° for 0 °, and electromagnetic wave is along-z
Cross polarization reflection coefficient t when the incidence of directionuvCurve.
Specific embodiment
The present invention is described in further details in the following with reference to the drawings and specific embodiments.
Embodiment 1
The present embodiment provides a kind of broadband selective wave transparent polarize regulation electromagnetic structure, which includes 5 layers altogether, surface layer and
Bottom is the metal openings resonant ring of identical size and opening direction is mutually perpendicular to, and middle layer is metal dipole, dipoles scatter
It is medium substrate between son and resonant ring；The metal openings resonant ring opening direction diagonally, the metal pair
Extremely sub- long axis direction and resonant ring opening direction are in 45 ° of angles.The present embodiment is the medium substrate surface coating in t=2.0mm
Periodical metal pattern realization, unit size are as follows: p=7.5mm, a=5.0mm, b=1.4mm, g=1.0mm, l=7.0mm,
W=3.0mm；The electromagnetic parameter range of medium substrate are as follows: relative dielectric constant real part range is 2.0~4.6, and imaginary part range is 0
~0.1.
Above-mentioned polarization regulation electromagnetic structure is emulated, result is as shown in Figures 2 to 5, hangs down in u polarized electromagnetic wave
Under straight incidence, frequency bandwidth of the polarization conversion efficiency greater than 86% is 10.0GHz~12.3GHz；Vertically enter in v polarized electromagnetic wave
It penetrates down, it is 16.6GHz~22.3GHz that polarization conversion efficiency, which is greater than 86% frequency bandwidth,；When electromagnetic wave incident angle increases to 30 °
When, under u polarized wave is incident, frequency bandwidth of the polarization conversion efficiency greater than 76% is 9.8GHz~12.2GHz；V polarized wave is incident
Under, frequency bandwidth of the polarization conversion efficiency greater than 76% is 15.3GHz~21.2GHz.Electromagnetic structure is in two kinds of polarized wave incidences
Under produce different polarization conversion frequency bands, there is selection filtering characteristic, and polarization conversion efficiency and frequency bandwidth can obtain
Reinforce.
Embodiment 2
The present embodiment broadband selective wave transparent polarization regulation electromagnetic structure is the medium substrate surface coating in t=2.5mm
Periodical metal pattern realization, unit size are as follows: p=7.5mm, a=5.0mm, b=1.4mm, g=1.0mm, l=7.0mm,
W=3.0mm；The electromagnetic parameter range of medium substrate are as follows: relative dielectric constant real part range is 2.0~4.6, and imaginary part range is 0
~0.1.
Above-mentioned polarization regulates and controls electromagnetic structure, and under u polarized electromagnetic wave vertical incidence, polarization conversion efficiency is greater than 90% frequency
Bandwidth is 9.8GHz~11.0GHz；Under v polarized electromagnetic wave vertical incidence, polarization conversion efficiency is greater than 90% frequency bandwidth
For 15.7GHz~20.0GHz；When electromagnetic wave incident angle increases to 30 °, under u polarized wave is incident, polarization conversion efficiency is greater than
88% frequency bandwidth is 9.9GHz~11.3GHz；Under v polarized wave is incident, polarization conversion efficiency is greater than 88% frequency bandwidth
For 16.0GHz~20.1GHz.Electromagnetic structure produces different polarization conversion frequency bands in the case where two kinds of polarized waves are incident, has choosing
Filtering characteristic is selected, and polarization conversion efficiency and frequency bandwidth can be strengthened.
Embodiment 3
The present embodiment broadband selective wave transparent polarization regulation electromagnetic structure is the medium substrate surface coating in t=2.5mm
Periodical metal pattern realization, unit size are as follows: p=8.0mm, a=4.8mm, b=1.6mm, g=1.0mm, l=7.0mm,
W=3.0mm；The electromagnetic parameter range of medium substrate are as follows: relative dielectric constant real part range is 2.0~4.6, and imaginary part range is 0
~0.1.
Above-mentioned polarization regulates and controls electromagnetic structure, and under u polarized electromagnetic wave vertical incidence, polarization conversion efficiency is greater than 87% frequency
Bandwidth is 9.8GHz~11.6GHz；Under v polarized electromagnetic wave vertical incidence, polarization conversion efficiency is greater than 87% frequency bandwidth
For 15.8GHz~20.3GHz；When electromagnetic wave incident angle increases to 30 °, under u polarized wave is incident, polarization conversion efficiency is greater than
86% frequency bandwidth is 9.8GHz~12.0GHz；Under v polarized wave is incident, polarization conversion efficiency is greater than 86% frequency bandwidth
For 16.4GHz~20.5GHz.Electromagnetic structure produces different polarization conversion frequency bands in the case where two kinds of polarized waves are incident, has choosing
Filtering characteristic is selected, and polarization conversion efficiency and frequency bandwidth can be strengthened.
Embodiment 4
The present embodiment broadband selective wave transparent polarization regulation electromagnetic structure is the medium substrate surface coating in t=2.3mm
Periodical metal pattern realization, unit size are as follows: p=7.5mm, a=4.8mm, b=1.6mm, g=1.0mm, l=7.0mm,
W=3.0mm；The electromagnetic parameter range of medium substrate are as follows: relative dielectric constant real part range is 2.0~4.6, and imaginary part range is 0
~0.1.
Above-mentioned polarization regulates and controls electromagnetic structure, and under u polarized electromagnetic wave vertical incidence, polarization conversion efficiency is greater than 83% frequency
Bandwidth is 9.8GHz~12.1GHz；Under v polarized electromagnetic wave vertical incidence, polarization conversion efficiency is greater than 83% frequency bandwidth
For 16.1GHz~20.5GHz；When electromagnetic wave incident angle increases to 30 °, under u polarized wave is incident, polarization conversion efficiency is greater than
76% frequency bandwidth is 9.7GHz~12.9GHz；Under v polarized wave is incident, polarization conversion efficiency is greater than 76% frequency bandwidth
For 16.1GHz~21.0GHz.Electromagnetic structure produces different polarization conversion frequency bands in the case where two kinds of polarized waves are incident, has choosing
Filtering characteristic is selected, and polarization conversion efficiency and frequency bandwidth can be strengthened.
The above description is merely a specific embodiment, any feature disclosed in this specification, except non-specifically
Narration, can be replaced by other alternative features that are equivalent or have similar purpose；Disclosed all features or all sides
Method or in the process the step of, other than mutually exclusive feature and/or step, can be combined in any way.
Claims (5)
1. a kind of broadband selective wave transparent polarization regulation electromagnetic structure, which is characterized in that the electromagnetic structure includes 5 layers altogether, surface layer
It is mutually perpendicular to bottom for the metal openings resonant ring and opening direction of identical size, middle layer is metal dipole, metal pair
It is medium substrate extremely between son and resonant ring；The metal openings resonant ring opening direction diagonally, the metal
Dipole long axis direction and resonant ring opening direction are in 45 ° of angles.
2. by the polarization regulation electromagnetic structure of broadband selective wave transparent described in claim 1, which is characterized in that the metal openings are humorous
The outside of vibration ring is long are as follows: 3.5~6.5mm, inner edge are long are as follows: 0.8~2.0mm, aperture slots spacing are as follows: 0.8~1.6mm.
3. by the polarization regulation electromagnetic structure of broadband selective wave transparent described in claim 1, which is characterized in that the metal dipole
Length are as follows: 5.0~7.5mm, width are as follows: 1.5~4.5mm.
4. by the polarization regulation electromagnetic structure of broadband selective wave transparent described in claim 1, which is characterized in that the medium substrate
Electromagnetic parameter are as follows: relative dielectric constant real part range is 3.2~4.6, and imaginary part range is 0~0.2.
5. by the polarization regulation electromagnetic structure of broadband selective wave transparent described in claim 1, which is characterized in that the polarization regulation electricity
The period of magnetic structure are as follows: 6.5~8.5mm, structural thickness are as follows: 3.0~6.0mm.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108511918B (en) * | 2018-03-13 | 2020-08-28 | 东北石油大学 | Electromagnetic wave asymmetric transmission controller based on metamaterial |
| CN109473785B (en) * | 2018-12-21 | 2023-09-08 | 桂林电子科技大学 | Dipole resonance super-surface narrowband polarization converter |
| CN110364821A (en) * | 2019-07-26 | 2019-10-22 | 重庆邮电大学 | Ultra wide band Terahertz asymmetric transmission device |
| CN111725626B (en) * | 2020-07-08 | 2021-07-09 | 南京航空航天大学 | Antenna housing capable of realizing asymmetric transmission and energy isolation of electromagnetic waves through absorption and reconstruction |
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| CN102479988A (en) * | 2011-03-15 | 2012-05-30 | 深圳光启高等理工研究院 | Metamaterial polarization transformer |
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| CN102479988A (en) * | 2011-03-15 | 2012-05-30 | 深圳光启高等理工研究院 | Metamaterial polarization transformer |
| CN102692733A (en) * | 2012-05-24 | 2012-09-26 | 哈尔滨工程大学 | Multimodal cross polarization filter based on metamaterials |
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