CN211700574U - Reflection type super-surface unit with circular polarization dual functions - Google Patents
Reflection type super-surface unit with circular polarization dual functions Download PDFInfo
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- CN211700574U CN211700574U CN202020460174.7U CN202020460174U CN211700574U CN 211700574 U CN211700574 U CN 211700574U CN 202020460174 U CN202020460174 U CN 202020460174U CN 211700574 U CN211700574 U CN 211700574U
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Abstract
The invention discloses a reflective super-surface unit with circular polarization dual functions, which comprises a surface metal structure layer, a middle medium layer and a bottom metal ground which are sequentially arranged; the surface metal structure layer comprises a first metal folding line, a second metal folding line, a third metal folding line and a fourth metal folding line, the folding line sections on the two sides of each metal folding line are parallel to the middle folding line section, and the adjacent metal folding lines are orthogonally arranged. By changing the size parameters of the four metal fold lines, the unit can respectively realize phase modulation and amplitude regulation of reflected waves in different frequency bands. The super-surface unit can realize left-hand polarization reflected waves with different phases at a frequency point of 13.5GHz under the incidence of left-hand polarization electromagnetic waves; at 16.5GHz, the unit can reflect right-handed polarized electromagnetic waves with opposite handedness, and can regulate and control the amplitude of the reflected waves.
Description
Technical Field
The invention belongs to the technical field of novel artificial electromagnetic materials, and particularly relates to a reflective super-surface unit with circular polarization dual functions in a microwave section.
Background
The metamaterial is formed by repeatedly arranging three-dimensional composite structures in a certain mode, and specific electromagnetic properties can be given to the metamaterial by artificially designing the shape, the size, the arrangement mode and the like of the composite structures. The super surface is a two-dimensional form of a metamaterial, the thickness of the super surface is far smaller than the wavelength, so that the super surface is smaller in volume and lower in loss, and processing and integration are facilitated. And the super surface also has singular electromagnetic characteristics, and the phase, amplitude and polarization mode of electromagnetic waves can be effectively regulated and controlled.
The circularly polarized wave is an instantaneous rotating field with equal amplitude, and is divided into left-hand circular polarization and right-hand circular polarization according to the propagation direction of the electromagnetic wave instantaneous electric field vector. The circularly polarized wave has good anti-interference performance and small propagation attenuation in rain and snow, so that stable transmission and reception of communication signals can be realized.
At present, most of the super-surface units can realize phase modulation by designing different material structures, but amplitude cannot be regulated and controlled simultaneously.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a reflective super-surface unit with circular polarization dual functions. Under the incidence of left-hand polarization electromagnetic waves, the unit respectively realizes dual functions of modulating the reflection phase of left-hand circularly polarized emission and regulating and controlling the reflection amplitude of right-hand circularly polarized emission in different frequency bands by controlling the size parameters of the four metal fold lines.
In order to achieve the purpose, the invention adopts the following technical scheme:
a reflective super-surface unit with circular polarization dual functions is characterized in that: the super-surface unit comprises a surface metal structure layer, a middle medium layer and a bottom metal ground which are sequentially arranged from top to bottom; the surface metal structure layer comprises a first metal folding line, a second metal folding line, a third metal folding line and a fourth metal folding line, wherein the first metal folding line, the second metal folding line, the third metal folding line and the fourth metal folding line are attached to the upper surface of the middle medium layer, the folding line sections on the two sides of each metal folding line are parallel to the middle folding line section, and the adjacent metal folding lines are orthogonally arranged.
Furthermore, the periodic side length p of the super-surface unit is 9-11mm, and the lengths a of the broken line sections on the two sides of the first metal broken line are both 2.7-2.9 mm; the length b of the broken line sections on the two sides of the second metal broken line is 2.45-2.65 mm; the length c of the broken line segments on the two sides of the third metal broken line is 1.5-1.7 mm; the length d of the broken line segments on the two sides of the fourth metal broken line is 1.4-1.6 mm; the lengths e of middle broken line sections of the first metal broken line, the second metal broken line, the third metal broken line and the fourth metal broken line are all 2.9-3.1mm, and the variation ranges of the lengths f of the broken line sections connected with the middle broken line sections on the two sides are all 0-2.5 mm; the width w of each broken line segment of the first metal broken line, the second metal broken line, the third metal broken line and the fourth metal broken line is 0.2-0.4mm, and the distance g between the broken line segments on the two sides and the unit frame is 0.3-0.5 mm; the thickness h of the intermediate dielectric layer is 2.9-3.1mm, the dielectric constant is 2.05-2.45, and the loss tangent is-0.002-0.004.
Preferably, the periodic side length p of the super-surface unit is 10mm, and the lengths a of the broken line segments on the two sides of the first metal broken line are both 2.8 mm; the length b of the broken line segments on the two sides of the second metal broken line is 2.55 mm; the length c of the broken line segments on the two sides of the third metal broken line is 1.6 mm; the length d of the broken line segments on the two sides of the fourth metal broken line is 1.5 mm; the lengths e of middle broken line sections of the first metal broken line, the second metal broken line, the third metal broken line and the fourth metal broken line are all 3.0mm, and the variation ranges of the lengths f of the broken line sections connected with the middle broken line sections on the two sides are all 0-2.4 mm; the width w of each broken line segment of the first metal broken line, the second metal broken line, the third metal broken line and the fourth metal broken line is 0.3mm, and the distance g between the broken line segments on the two sides and the unit frame is 0.4 mm; the thickness h of the middle dielectric layer is 3.0 mm.
The super-surface basic unit has 10 basic states, and under irradiation of left-handed circularly polarized incident waves, the basic unit can perform phase control from left-handed circularly polarized incident to left-handed circularly polarized reflection near a 13.5GHz frequency point by changing the length f of a broken line section formed by connecting broken line sections on two sides of a first metal broken line, a second metal broken line, a third metal broken line and a fourth metal broken line with a middle broken line section, the phase range reaches 350 degrees, and meanwhile, amplitude control from left-handed circularly polarized incident to right-handed circularly polarized reflection near 16.5GHz can be performed.
Further, the operating states of the 10 types of super-surface units respectively correspond to the lengths f =0.0mm, f =0.4mm, f =0.6mm, f =0.8mm, f =1.0mm, f =1.2mm, f =1.5mm, f =1.6mm, f =1.9mm and f =2.4mm of the broken line segment of the two sides of the first metal broken line, the second metal broken line, the third metal broken line and the fourth metal broken line connected with the middle broken line segment.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the emitting of left-handed circular polarized waves and right-handed circular polarized waves can be realized respectively in two frequency ranges by utilizing a specific metal shape;
2. the invention realizes the wider reflection phase response range and the regulation and control of the reflection amplitude by changing the size parameters of the metal broken lines;
3. the invention has simple processing and convenient realization, and is easy to prepare and process in a microwave frequency band only by depending on simple metal patterns.
Drawings
FIG. 1 is a schematic front view of a super-surface unit according to the present invention;
FIG. 2 is a schematic cross-sectional structural view of a super-surface unit in accordance with the present invention;
wherein: 1-surface metal structure, 11-first metal fold line, 12-second metal fold line, 13-third metal fold line, 14-fourth metal fold line, 2-middle dielectric layer and 3-bottom metal ground; p is the periodic side length of the super-surface unit, a is the length of the broken line sections on the two sides of the first metal broken line, b is the length of the broken line sections on the two sides of the second metal broken line, c is the length of the broken line sections on the two sides of the third metal broken line, d is the length of the broken line sections on the two sides of the fourth metal broken line, e is the length of the broken line section in the middle of the metal broken line, f is the length of the broken line section connecting the broken line sections on the two sides of the metal broken line and the broken line section in the middle of the metal broken line, w is the width of each broken line section of the metal broken line, g is the distance between the.
FIG. 3 is a simulation result of a super-surface unit of the present invention, wherein: FIGS. 3 (a) and 3 (b) are the reflected phase and amplitude responses for left-hand polarized incident-left-hand polarized emergent; fig. 3 (c) and 3 (d) are the reflected phase and amplitude responses for left-handed polarized incident-right-handed polarized exit.
Detailed Description
The present invention will be further described with reference to the following examples.
As shown in fig. 1-2, a reflective super-surface unit with dual functions of circular polarization is characterized in that: the super-surface unit comprises a surface metal structure layer 1, a middle medium layer 2 and a bottom metal ground 3 which are sequentially arranged from top to bottom; the surface metal structure layer comprises a first metal folding line 11, a second metal folding line 12, a third metal folding line 13 and a fourth metal folding line 14 which are attached to the upper surface of the middle medium layer 2, the folding line sections on the two sides of each metal folding line are parallel to the middle folding line section, and the adjacent metal folding lines are orthogonally arranged.
The periodic side length p of the super-surface unit is 9-11mm, and the lengths a of the broken line segments on the two sides of the first metal broken line 11 are both 2.7-2.9 mm; the length b of the broken line segments on the two sides of the second metal broken line 12 is 2.45-2.65 mm; the length c of the broken line segments on the two sides of the third metal broken line 13 is 1.5-1.7 mm; the length d of the broken line segments on the two sides of the fourth metal broken line 14 is 1.4-1.6 mm; the lengths e of middle broken line sections of the first metal broken line 11, the second metal broken line 12, the third metal broken line 13 and the fourth metal broken line 14 are all 2.9-3.1mm, and the variation ranges of the lengths f of the broken line sections connected with the middle broken line sections on the two sides are all 0-2.5 mm; the width w of each broken line segment of the first metal broken line 11, the second metal broken line 12, the third metal broken line 13 and the fourth metal broken line 14 is 0.2-0.4mm, and the distance g between the broken line segments at two sides and the unit frame is 0.3-0.5 mm; the thickness h of the intermediate dielectric layer 2 is 2.9-3.1mm, the dielectric constant is 2.05-2.45, and the loss tangent is-0.002-0.004.
As a preferable scheme, the periodic side length p of the super-surface unit is 10mm, and the lengths a of the broken line segments on both sides of the first metal broken line 11 are both 2.8 mm; the length b of the broken line segments on the two sides of the second metal broken line 12 is 2.55 mm; the length c of the broken line segments on the two sides of the third metal broken line 13 is 1.6 mm; the length d of the broken line segments on the two sides of the fourth metal broken line 14 is 1.5 mm; the lengths e of middle broken line sections of the first metal broken line 11, the second metal broken line 12, the third metal broken line 13 and the fourth metal broken line 14 are all 3.0mm, and the variation ranges of the lengths f of the broken line sections connected with the middle broken line sections on the two sides are all 0-2.4 mm; the width w of each broken line segment of the first metal broken line 11, the second metal broken line 12, the third metal broken line 13 and the fourth metal broken line 14 is 0.3mm, and the distance g between the broken line segments on the two sides and the unit frame is 0.4 mm; the thickness h of the intermediate dielectric layer 2 is 3.0 mm.
The super-surface unit has 10 basic states, and can perform phase regulation from left-handed circular polarization incidence to left-handed circular polarization reflection near a 13.5GHz frequency point under irradiation of left-handed circular polarization incident waves by changing the length f of a broken line section formed by connecting broken line sections on two sides of a first metal broken line 11, a second metal broken line 12, a third metal broken line 13 and a fourth metal broken line 14 with a middle broken line section, wherein the phase range reaches 350 degrees, and meanwhile, amplitude control from left-handed circular polarization incidence to right-handed circular polarization reflection can be performed near 16.5 GHz.
Specifically, the operating states of the 10 types of super-surface units correspond to lengths f =0.0mm, f =0.4mm, f =0.6mm, f =0.8mm, f =1.0mm, f =1.2mm, f =1.5mm, f =1.6mm, f =1.9mm, and f =2.4mm of broken line segments connecting two side broken line segments of the first metal broken line 11, the second metal broken line 12, the third metal broken line 13, and the fourth metal broken line 14, respectively, with the middle broken line segment.
As shown in fig. 3, under the irradiation of the left-hand polarized electromagnetic wave, the unit can realize the switching of two functions of regulating and controlling the phase and modulating the amplitude in different frequency bands. As can be seen from fig. 3 (a) and 3 (b), at the frequency point of 13.5GHz, the unit can regulate and control the phase response of the left-hand polarized reflected wave, the controllable phase range covers 350 °, the reflection amplitudes are all greater than 0.9dB, and a 2-bit digitally encoded super-surface can be further realized. In fig. 3 (c) and 3 (d), the cell can emit circularly polarized waves with opposite handedness at a frequency around 16.5GHz, and the amplitude of the right-hand polarized reflected wave can be modulated in the range of 0.73-0.061 dB.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (5)
1. A reflective super-surface unit with circular polarization dual functions is characterized in that: the super-surface unit comprises a surface metal structure layer (1), a middle dielectric layer (2) and a bottom metal ground (3) which are sequentially arranged from top to bottom; the surface metal structure layer comprises a first metal folding line (11), a second metal folding line (12), a third metal folding line (13) and a fourth metal folding line (14), wherein the first metal folding line, the second metal folding line, the third metal folding line and the fourth metal folding line are attached to the upper surface of the middle medium layer (2), the two side folding lines of each metal folding line are parallel to the middle folding line, and the adjacent metal folding lines are orthogonally arranged.
2. The super surface unit of claim 1, wherein: the periodic side length p of the super-surface unit is 9-11mm, and the lengths a of the broken line segments on the two sides of the first metal broken line (11) are both 2.7-2.9 mm; the length b of the broken line segments at the two sides of the second metal broken line (12) is 2.45-2.65 mm; the length c of the broken line segments on the two sides of the third metal broken line (13) is 1.5-1.7 mm; the length d of the broken line segments on the two sides of the fourth metal broken line (14) is 1.4-1.6 mm; the lengths e of middle broken line sections of the first metal broken line (11), the second metal broken line (12), the third metal broken line (13) and the fourth metal broken line (14) are all 2.9-3.1mm, and the variation ranges of the lengths f of the broken line sections connected with the middle broken line sections on the two sides are all 0-2.5 mm; the width w of each broken line segment of the first metal broken line (11), the second metal broken line (12), the third metal broken line (13) and the fourth metal broken line (14) is 0.2-0.4mm, and the distance g between the broken line segments at two sides and the unit frame is 0.3-0.5 mm; the thickness h of the intermediate dielectric layer (2) is 2.9-3.1mm, the dielectric constant is 2.05-2.45, and the loss tangent is-0.002-0.004.
3. The super surface unit of claim 1, wherein: the periodic side length p of the super-surface unit is 10mm, and the lengths a of the broken line segments on the two sides of the first metal broken line (11) are both 2.8 mm; the length b of the broken line segments on the two sides of the second metal broken line (12) is 2.55 mm; the length c of the broken line segments on the two sides of the third metal broken line (13) is 1.6 mm; the length d of the broken line segments on the two sides of the fourth metal broken line (14) is 1.5 mm; the lengths e of middle broken line sections of the first metal broken line (11), the second metal broken line (12), the third metal broken line (13) and the fourth metal broken line (14) are all 3.0mm, and the variation ranges of the lengths f of the broken line sections connected with the middle broken line sections on the two sides are all 0-2.4 mm; the width w of each broken line segment of the first metal broken line (11), the second metal broken line (12), the third metal broken line (13) and the fourth metal broken line (14) is 0.3mm, and the distance g between the broken line segments on the two sides and the unit frame is 0.4 mm; the thickness h of the intermediate medium layer (2) is 3.0 mm.
4. The super surface unit of claim 1, wherein: the super-surface unit has 10 basic states, and the basic unit can perform phase regulation from left-handed circular polarization incidence to left-handed circular polarization reflection near a frequency point of 13.5GHz under irradiation of left-handed circular polarization incident waves by changing the length f of a broken line section formed by connecting broken line sections on two sides of a first metal broken line (11), a second metal broken line (12), a third metal broken line (13) and a fourth metal broken line (14) with a middle broken line section, wherein the phase range reaches 350 degrees, and meanwhile, amplitude control from left-handed circular polarization incidence to right-handed circular polarization reflection near 16.5GHz can be performed.
5. The super surface unit of claim 4, wherein: the working states of the 10 super-surface units respectively correspond to the lengths f =0.0mm, f =0.4mm, f =0.6mm, f =0.8mm, f =1.0mm, f =1.2mm, f =1.5mm, f =1.6mm, f =1.9mm and f =2.4mm of the broken line segments of the two sides of the first metal broken line (11), the second metal broken line (12), the third metal broken line (13) and the fourth metal broken line (14) which are connected with the middle broken line segment.
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| CN202020460174.7U CN211700574U (en) | 2020-04-01 | 2020-04-01 | Reflection type super-surface unit with circular polarization dual functions |
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