CN109687157A - The super surface of controllable suction wave and polarization conversion function based on electric field triggering - Google Patents
The super surface of controllable suction wave and polarization conversion function based on electric field triggering Download PDFInfo
- Publication number
- CN109687157A CN109687157A CN201811617874.6A CN201811617874A CN109687157A CN 109687157 A CN109687157 A CN 109687157A CN 201811617874 A CN201811617874 A CN 201811617874A CN 109687157 A CN109687157 A CN 109687157A
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- wave
- electric field
- super surface
- polarization conversion
- metal patch
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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
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0086—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials
-
- 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
-
- 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
- H01Q15/244—Polarisation converters converting a linear polarised wave into a circular polarised wave
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
- H01Q17/008—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems with a particular shape
Abstract
A kind of super surface of controllable suction wave and polarization conversion function based on electric field triggering, super surface cell including m × n periodic arrangement, super surface cell includes medium substrate, it is printed on the metal patch unit of one side of medium substrate and the metal floor of another side, metal patch unit differs 180 ° by two opening directions and is in the U-shaped metal patch of mirror symmetry, and the metal micro-strip line composition of two U-shaped metal patches of connecting, when the direction of an electric field of incident electromagnetic wave is gradually rotated to x-axis direction from y-axis, that is, U-shaped metal patch opening direction, triggering is inhaled wave rate and is gradually reduced, it triggers simultaneously and realizes electromagnetic wave linear polarization-circular polarisation-linear polarization characteristics, and when the direction of an electric field of incident electromagnetic wave is located on the angle separated time of x-axis and y-axis, polarization conversion rate is best.The present invention can trigger realization suction wave and polarization conversion function by changing electromagnetic wave direction of an electric field respectively, can be used in microwave telecommunication system.
Description
Technical field
The invention belongs to microwave technical fields, are related to a kind of controllable suction wave and polarization conversion function based on electric field triggering
Super surface, can be used for wirelessly communicate and field of radar.
Background technique
Super surface effectively can manipulate electromagnetic wave according to demand as a kind of Novel manual electromagnetic material.In order to full
The requirement of sufficient wireless communication system realizes that inhaling the functions such as wave, polarization conversion has become research hotspot by super surface.Such as:
Authorization Notice No. is 104638382 B of CN, and the patent of entitled " a kind of double frequency Meta Materials wave-absorber " discloses a kind of double frequency
Meta Materials wave-absorber, different using two kinds of structures generations two of metal ring in the metal Fang Huan and metal Fang Huan of its top layer
EMR electromagnetic resonance inhales wave frequency point, but the structure is only able to achieve suction wave energy, can not achieve polarization conversion function.For example, authorization is public
Accusing number is 104577352 B of CN, and entitled " a kind of's microwave frequency band active frequencies select the adjustable polarization converter in surface " is special
Benefit discloses a kind of microwave frequency band active frequencies selection adjustable polarization converter in surface, passes through PIN on control frequency-selective surfaces
The on off operating mode of diode realizes the output of circular polarisation or linear polarised electromagnetic wave, but it can only realize polarization conversion function, can not
It realizes and inhales wave energy.
It is higher and higher to the requirement that system function is integrated with the development of wireless communication system, but existing wave-absorber
It is usually only able to achieve respective function with polarization converter, it is shared there is no structure is realized, therefore can be realized the super of two kinds of functions
Surface has great importance to the integrated of the wireless communication systems such as radar detection.
Summary of the invention
It is an object of the invention in view of the deficiency of the prior art, propose a kind of grasping based on electric field triggering
The super surface of wave and polarization conversion function is inhaled in control, it is intended to only pass through the electric field side for changing incidence wave using same super surface texture
It is realized to triggering respectively and inhales two kinds of functions of wave and polarization conversion.
To achieve the above object, the technical scheme adopted by the invention is as follows:
A kind of super surface of controllable suction wave and polarization conversion function based on electric field triggering, including m × n periodical row
The super surface cell of cloth, m >=2, n >=2, above-mentioned super surface cell include medium substrate 1, are printed on 1 side of medium substrate
The metal patch unit 3 of metal floor 2 and the other side, above-mentioned metal patch unit 3 differ 180 ° by two opening directions and are in
The U-shaped metal patch 31 of mirror symmetry, and the metal micro-strip line 32 of this two U-shaped metal patches 31 of connecting form, and work as incidence
The direction of an electric field of electromagnetic wave is from the positive direction of y-axis, that is, U-shaped metal patch 31 opening direction gradually to negative direction of the x-axis or from y-axis
When negative direction is gradually rotated to positive direction of the x-axis, triggering is inhaled wave rate and is gradually reduced, while triggering and realizing that electromagnetic wave linear polarization-is left-handed
Circular polarisation-linear polarization characteristics, and when the direction of an electric field of incident electromagnetic wave is located on the angle separated time of positive x-axis and negative y-axis, polarization turns
It is best to change rate；When incident electromagnetic wave direction of an electric field from positive direction of the y-axis gradually to positive direction of the x-axis or from negative direction of the y-axis gradually to x
When axis negative direction rotates, triggering is inhaled wave rate and is gradually reduced, while triggering and realizing electromagnetic wave linear polarization-right-handed circular polarization-linear polarization
Characteristic, and when the direction of an electric field of incident electromagnetic wave is located on the angle separated time of positive x-axis and positive y-axis, polarization conversion rate is best.
The super surface of above-mentioned controllable suction wave and polarization conversion function based on electric field triggering, wherein U-shaped metal patch 31,
Using the U-shaped paster structure in side, metal micro-strip line 32, two U-shaped metals using rectangular microstrip structure, in metal patch unit 3
The opening direction of patch 31 is opposite, and this two U-shaped metal patches 31 and the tie point of metal micro-strip line 32 are located at U-shaped metal patch
The midpoint on 31 bottom edge of piece.
The super surface of above-mentioned controllable suction wave and polarization conversion function based on electric field triggering, the suction wave of super surface cell
Frequency faMeetWherein, c is electromagnetic wave spread speed in free space, daIt is first
U-shaped 31 one end of metal patch is to metal micro-strip line connection point length a1+ b/2,32 length a of metal micro-strip line2And second U-shaped gold
Belong to 31 one end of patch to metal micro-strip line connection point length a1The sum of+b/2, εrFor the relative dielectric constant of medium substrate 1；It is above-mentioned
Super surface cell, polarization conversion frequency fpIn reflection frequency range and fp> fa, by the line width w for adjusting U-shaped metal patch bottom edge2
It adjusts the phase difference of two quadrature components of reflection electromagnetic wave and then adjusts polarization conversion frequency fpRange.
Compared with prior art, the present invention having the advantage that
Only by changing the direction of an electric field of incident electromagnetic wave in the present invention, triggering, which realizes, respectively inhales wave and polarization conversion two
Kind function realizes the now function there are two types of super surface using same super surface, realizes that structure is shared compared with prior art,
It is more easier system function integrated.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the embodiment of the present invention；
Fig. 2 is the metal patch cell schematics of the embodiment of the present invention；
Fig. 3 is the suction wave rate simulation result diagram of the embodiment of the present invention；
Fig. 4 is two quadrature component amplitudes, the phase simulation result diagram of the back wave of the embodiment of the present invention；
Fig. 5 is that the axis of the embodiment of the present invention compares simulation result diagram.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, invention is further described in detail.
Referring to Fig.1, the present invention includes the super surface cell of 10 × 10 periodic arrangements, and super surface cell is in the direction x and y
On the arrangement period be 10mm, be made of medium substrate 1, metal floor 2 and metal patch unit 3；The phase of medium substrate 1
To permittivity εr=4.4, with a thickness of 2mm, loss tangent δ=0.02, one side is printed with metal floor 2, separately
One side is printed with metal patch unit 3.
Referring to Fig. 2, metal patch unit 3 differs 180 ° by two opening directions, in mirror symmetry and opposite to each other U-shaped that be open
Metal patch 31, and the metal micro-strip line 32 of this two U-shaped metal patches 31 of connecting form, and inhale wave resonant frequency and meetC is electromagnetic wave spread speed in free space, daFor first U-shaped metal patch 31
One end is to metal micro-strip line connection point length a1+ b/2,32 length a of metal micro-strip line2And second U-shaped 31 one end of metal patch is arrived
Metal micro-strip line connection point length a1The sum of+b/2, εrFor the relative dielectric constant of medium substrate 1, a is taken in the present embodiment1=
2.25mm a2=2.5mm, w1=0.1mm, w2=0.7mm, b=2.5mm, the suction wave frequency rate of the present embodiment are 5.25GHz, polarization
Conversion frequency is 15GHz,.
The working principle of the invention is, when the incident electromagnetic wave propagated along the direction-z is line polarization wave and direction of an electric field is parallel
When y-axis, super surface cell is inhaled in design generates resonance at wave frequency rate, is realized and is inhaled in resonance frequency using the loss of medium substrate
Wave energy；When the incident electromagnetic wave direction of an electric field propagated along the direction-z is located on the angle separated time of x-axis and y-axis, pass through super surface
Unit can generate the x polarization propagated along the direction+z, y two kinds of reflection electromagnetic wave components of polarization simultaneously at polarization conversion frequency,
And the phase difference of two kinds of components has changed 90 ° relative to incident electromagnetic wave, to realize polarization conversion function.For example, incidence wave
For line polarization wave and when direction of an electric field is located on the angle separated time of positive x-axis and positive y-axis, y polarization and the x two component width of polarization of back wave
Degree ratio is about 1:1, andRealize the conversion of linear polarization to right-handed circular polarization；When incidence wave is right-handed circular polarization wave
And direction of an electric field, when being located on the angle separated time of positive x-axis and positive y-axis, y polarization and the x of back wave polarize two component amplitudes than about 1:
1, andRealize the conversion of right-handed circular polarization to linear polarization.
Below by way of emulation experiment, technical effect of the invention is described further.
1, simulated conditions and content.
Below based on the emulation experiment that the embodiment of the present invention is carried out, CST MICROWAVE STUDIO simulation software is utilized
It completes.
Emulation 1, emulates wave-absorbing effect of the embodiment of the present invention under 4.5~6GHz frequency, simulation result is such as
Shown in Fig. 3；
Emulation 2, to the embodiment of the present invention in 14~17GHz frequency range incident electromagnetic wave through super surface cell reflect after
The phase difference of the ratio between two quadrature component amplitudes and two quadrature components is emulated, and simulation result is as shown in Figure 4；
Emulation 3, to the embodiment of the present invention, incident line polarization wave passes through super surface conversion in 14~16.5GHz frequency range
It is emulated at the axis ratio of circular polarisation, simulation result is as shown in Figure 5.
2, analysis of simulation result
Referring to Fig. 3, in the present embodiment, incident electromagnetic wave is line polarization wave and direction of an electric field is parallel to y-axis and remains unchanged, and is entered
Firing angle θ rotates to 60 ° from 0 °, and super surface wave-absorbing effect under 5.25GHz frequency is good.Incidence angle θ within the scope of 0 °~60 °,
Wave rate is inhaled under 5.25GHz frequency greater than 90% in super surface.Referring to Fig. 2, super surface cell is symmetrical about y-axis, therefore incidence angle
It is identical to change variation effect within the scope of with 0 °~-60 ° within the scope of 0 °~60 °, under 5.25GHz frequency, in embodiment
Super surface, when incidence angle θ changes within the scope of -60 °~60 ° inhale wave rate be greater than 90%, therefore, super surface exists in embodiment
Wave-absorbing effect under 5.25GHz frequency is good.
Referring to Fig. 4, in the present embodiment, incident electromagnetic wave is the angle that line polarization wave and direction of an electric field are located at positive x-axis and positive y-axis
On separated time, after incidence wave is reflected by super surface cell, in 14~17GHz frequency range, back wave is parallel to x-axis and y-axis
Two component amplitude ratios in 0.930~0.980 range, phase differenceIn -114.0 °~-72.7 ° ranges
It is interior, therefore the conversion of line polarization wave to circularly polarised wave can be completed.
Referring to Fig. 5, in the present embodiment, incident electromagnetic wave is that line polarization wave and polarization direction and direction of an electric field are located at positive x-axis
On the angle separated time of positive y-axis, after incidence wave is by super surface reflection, line polarization wave is completed in 14~16.5GHz frequency range
To the conversion of right-handed circular polarization wave, Circular polarization ratio is less than 2dB in 14.4~16.2GHz frequency range, and circular polarisation effect is good
It is good.
Above description is only the preferred embodiment of the present invention, is not limited the invention, for the general of this field
For logical technical staff, the several modifications and improvements that can be made under the premise of not departing from innovation thinking of the present invention, but this
A little change all belongs to the scope of protection of the present invention.
Claims (4)
1. a kind of super surface of controllable suction wave and polarization conversion function based on electric field triggering, including m × n periodic arrangement
Super surface cell, m >=2, n >=2, the super surface cell includes medium substrate (1), is printed on medium substrate (1) side
Metal floor (2) and the other side metal patch unit (3), which is characterized in that the metal patch unit (3), by two
Opening direction differs 180 ° and is in the U-shaped metal patch (31) of mirror symmetry, and this two U-shaped metal patches (31) of connecting
Metal micro-strip line (32) composition, when the direction of an electric field of incident electromagnetic wave is from y-axis direction, that is, U-shaped metal patch (31) opening direction
When gradually rotating to x-axis direction, triggering is inhaled wave rate and is gradually reduced, while triggering and realizing electromagnetic wave linear polarization-circular polarisation-linear polarization
Characteristic, and when the direction of an electric field of incident electromagnetic wave is located on the angle separated time of x-axis and y-axis, polarization conversion rate is best.
2. the super surface of the controllable suction wave and polarization conversion function according to claim 1 based on electric field triggering, special
Sign is, the U-shaped metal patch (31), using the U-shaped paster structure in side, the metal micro-strip line (32), using rectangular microstrip
Structure.
3. the super surface of the controllable suction wave and polarization conversion function according to claim 2 based on electric field triggering, special
Sign is that the opening direction of the metal patch unit (3), two U-shaped metal patches (31) therein is opposite, and two U
Type metal patch (31) and the tie point of metal micro-strip line (32) are located at the midpoint on U-shaped metal patch (31) bottom edge.
4. the super surface of the controllable suction wave and polarization conversion function according to claim 1 based on electric field triggering, special
Sign is that the super surface cell inhales wave resonant frequency faCalculation formula are as follows:
Wherein, c is electromagnetic wave spread speed in free space, daFor a U-shaped metal patch length and metal micro-strip line length
The sum of, εrFor the relative dielectric constant of medium substrate；The super surface cell, polarization conversion frequency fpIn reflection frequency range and fp
> fa, by the line width w for adjusting U-shaped metal patch bottom edge2It adjusts the phase difference of two quadrature components of reflection electromagnetic wave and then adjusts
Polarization conversion frequency fpRange.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111129783A (en) * | 2020-01-10 | 2020-05-08 | 山西大学 | Function-reconfigurable metamaterial broadband polarization converter/absorber |
| CN111987473A (en) * | 2020-09-17 | 2020-11-24 | 西安电子科技大学 | Vortex multi-beam super-surface Cassegrain antenna with reconfigurable polarization |
| CN112525095A (en) * | 2020-11-25 | 2021-03-19 | 重庆大学 | Method for realizing super-surface biaxial strain sensing by utilizing polarization-phase-deformation relation |
| CN113809545A (en) * | 2021-10-08 | 2021-12-17 | 中国人民解放军空军工程大学 | Nonlinear wave-absorbing super surface for space electromagnetic waves |
| CN115020989A (en) * | 2022-08-05 | 2022-09-06 | 盛纬伦(深圳)通信技术有限公司 | Chiral metamaterial unit and array capable of tuning linear circular polarization conversion |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111129783A (en) * | 2020-01-10 | 2020-05-08 | 山西大学 | Function-reconfigurable metamaterial broadband polarization converter/absorber |
| CN111129783B (en) * | 2020-01-10 | 2020-12-25 | 山西大学 | Function-reconfigurable metamaterial broadband polarization converter/absorber |
| CN111987473A (en) * | 2020-09-17 | 2020-11-24 | 西安电子科技大学 | Vortex multi-beam super-surface Cassegrain antenna with reconfigurable polarization |
| CN111987473B (en) * | 2020-09-17 | 2021-06-01 | 西安电子科技大学 | Vortex multi-beam super-surface Cassegrain antenna with reconfigurable polarization |
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| CN113809545A (en) * | 2021-10-08 | 2021-12-17 | 中国人民解放军空军工程大学 | Nonlinear wave-absorbing super surface for space electromagnetic waves |
| CN115020989A (en) * | 2022-08-05 | 2022-09-06 | 盛纬伦(深圳)通信技术有限公司 | Chiral metamaterial unit and array capable of tuning linear circular polarization conversion |
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