CN111244637A - High-efficiency super-surface unit with dual-polarization reflection phase regulation - Google Patents
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- 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
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Abstract
The invention discloses a high-efficiency super-surface unit with dual-polarization reflection phase regulation, which comprises a surface metal structure layer, an upper dielectric plate layer, a lower metal structure layer, a lower dielectric plate layer and a bottom metal ground, wherein the surface metal structure layer, the upper dielectric plate layer, the lower metal structure layer, the lower dielectric plate layer and the bottom metal ground are sequentially arranged; the surface metal structure layer comprises a first rectangular strip patch, a second rectangular strip patch, a third rectangular strip patch and a fourth rectangular strip patch, wherein the first rectangular strip patch, the second rectangular strip patch, the third rectangular strip patch and the fourth rectangular strip patch are parallel to each other and are all vertically placed; the lower metal structure layer comprises a fifth rectangular strip patch, a sixth rectangular strip patch, a seventh rectangular strip patch and an eighth rectangular strip patch, the fifth rectangular strip patch, the sixth rectangular strip patch, the seventh rectangular strip patch and the eighth rectangular strip patch are parallel to each other, and are placed horizontally. The invention adopts two metal structure layers which are orthogonally arranged, and by changing the size parameters of the metal structure layers, the super-surface basic unit realizes the wide-range reflection phase regulation and control under the irradiation of x-polarization electromagnetic waves and y-polarization electromagnetic waves, the phase change gradients are basically the same, and the unit has high reflection efficiency.
Description
Technical Field
The invention belongs to the technical field of novel artificial electromagnetic materials, and particularly relates to a high-efficiency super-surface unit with dual-polarization reflection phase regulation in a microwave band.
Background
The metamaterial is an artificial composite structure with unique electromagnetic characteristics, and effective regulation and control of electromagnetic waves can be realized by properly designing a material structure in a sub-wavelength range. However, due to the problems of processing, loss and the like caused by the three-dimensional structure of the metamaterial, the further expansion of the metamaterial is limited. Therefore, emerging metasurfaces are formed based on the concept of compressing three-dimensional metamaterials to two dimensions. The super surface and the metamaterial have similar characteristics in the aspect of regulation and control of electromagnetic waves, but the super surface has a lower space dimension, so that the super surface is simple and compact in structure, small in energy loss and better in flexibility in the aspect of application. In order to describe the properties of a hypersurface in a more simplified way, the concept of coding a hypersurface has been proposed in recent years, which enables the modulation of electromagnetic waves by exploiting limited digital states.
The super-surface may introduce a gradient of phase discontinuities over a range much smaller than the wavelength. For a reflective super-surface, when an electromagnetic wave reaches the surface of the structure, different phase changes are generated on different super-surface units, so that the reflected wave of the incident electromagnetic wave can be regulated. Through reasonable design, the reflection-type super surface can realize wider phase coverage and high reflectivity, so the reflection-type super surface is widely applied to the aspects of polarization converters, wave absorbers, holographic devices and the like.
However, most artificial electromagnetic super-surfaces can only regulate electromagnetic waves with a single polarization direction, which limits the application and the reflection performance of the super-surface.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a high-efficiency super-surface unit with dual-polarization reflection phase regulation.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-efficiency super-surface unit with dual-polarization reflection phase regulation comprises a basic unit, a first reflection unit and a second reflection unit, wherein the basic unit comprises a surface metal structure layer, an upper dielectric plate layer, a lower metal structure layer, a lower dielectric plate layer and a bottom metal ground which are sequentially arranged from top to bottom; the surface metal structure layer comprises a first rectangular strip patch, a second rectangular strip patch, a third rectangular strip patch and a fourth rectangular strip patch, wherein the first rectangular strip patch, the second rectangular strip patch, the third rectangular strip patch and the fourth rectangular strip patch are parallel to each other and are all vertically placed; the lower metal structure layer comprises a fifth rectangular strip patch, a sixth rectangular strip patch, a seventh rectangular strip patch and an eighth rectangular strip patch, the fifth rectangular strip patch, the sixth rectangular strip patch, the seventh rectangular strip patch and the eighth rectangular strip patch are parallel to each other, and are placed horizontally.
Further, the periodic side length a of the basic unit is 14-16 mm; the variation ranges of the lengths b of the first rectangular strip patch, the second rectangular strip patch, the third rectangular strip patch and the fourth rectangular strip patch are 5.9-12.5mm, and the variation ranges of the lengths e of the fifth rectangular strip patch, the sixth rectangular strip patch, the seventh rectangular strip patch and the eighth rectangular strip patch are 6.2-8.55 mm; the widths c of the first rectangular strip patch, the second rectangular strip patch, the third rectangular strip patch, the fourth rectangular strip patch, the fifth rectangular strip patch, the sixth rectangular strip patch, the seventh rectangular strip patch and the eighth rectangular strip patch are all 1.4-1.6mm, and the mutual distance d is 2.15-2.35 mm; the thickness h of the upper dielectric plate layer and the lower dielectric plate layer is 0.9-1.1mm, the dielectric constant is 4.1-4.5, the loss tangent is 0.000-0.006, and the upper dielectric plate layer and the lower dielectric plate layer adopt the same medium.
Preferably, the periodic side length a of the basic unit is 15 mm; the variation ranges of the lengths b of the first rectangular strip patch, the second rectangular strip patch, the third rectangular strip patch and the fourth rectangular strip patch are all 6-12.4mm, and the variation ranges of the lengths e of the fifth rectangular strip patch, the sixth rectangular strip patch, the seventh rectangular strip patch and the eighth rectangular strip patch are 6.3-8.45 mm; the widths c of the first rectangular strip patch, the second rectangular strip patch, the third rectangular strip patch, the fourth rectangular strip patch, the fifth rectangular strip patch, the sixth rectangular strip patch, the seventh rectangular strip patch and the eighth rectangular strip patch are all 1.5mm, and the mutual distance d is all 2.25 mm; the thickness h of the upper dielectric plate layer and the lower dielectric plate layer is 1 mm.
Furthermore, the high-efficiency super-surface unit with dual-polarization reflection phase regulation has 4 basic unit states in total; under the irradiation of normal incidence x-polarization or y-polarization electromagnetic waves, 4 kinds of digital state codes with different phases can be independently generated, and the 4 kinds of digital state codes with different phases correspond to the sizes of the surface metal structure layer and the lower metal structure layer of the 4 basic units.
Further, the 4 digital state codes are "0", "1", "2", and "3", respectively, which represent the reflected phase digital states under normal incidence electromagnetic waves, respectively.
Further, in the working states of the 4 basic units, the length b of the first rectangular strip patch (11), the length b of the second rectangular strip patch, the length b of the third rectangular strip patch and the length b of the fourth rectangular strip patch which correspond to '0' are all 6mm, and the length e of the fifth rectangular strip patch, the length e of the sixth rectangular strip patch, the length e of the seventh rectangular strip patch and the length e of the eighth rectangular strip patch are all 6.3 mm; the length b of the '1' corresponding to the first rectangular long strip patch, the second rectangular long strip patch, the third rectangular long strip patch and the fourth rectangular long strip patch is 7.2mm, and the length e of the fifth rectangular long strip patch, the sixth rectangular long strip patch, the seventh rectangular long strip patch and the eighth rectangular long strip patch is 7.04 mm; the length b of the '2' corresponding to the first rectangular long strip patch, the second rectangular long strip patch, the third rectangular long strip patch and the fourth rectangular long strip patch is 8.02mm, and the length e of the fifth rectangular long strip patch, the sixth rectangular long strip patch, the seventh rectangular long strip patch and the eighth rectangular long strip patch is 7.44 mm; the length b of the first rectangular strip patch, the second rectangular strip patch, the third rectangular strip patch and the fourth rectangular strip patch corresponding to the length of 3 is 12.4mm, and the length e of the fifth rectangular strip patch, the sixth rectangular strip patch, the seventh rectangular strip patch and the eighth rectangular strip patch is 8.45 mm.
Compared with the prior art, the invention has the following beneficial effects:
1. the method is different from the traditional scheme of analyzing and designing the super surface by using equivalent medium parameters, analyzes and designs the super surface from the angle of digital coding, and greatly simplifies the design process;
2. according to the invention, by adjusting the size parameters of the basic unit metal structure, a wider reflection phase regulation range is realized, and the reflection efficiency is high.
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 basic unit according to the present invention;
FIG. 2 is a schematic view of the underlying metal structure layer of the basic cell of the present invention;
FIG. 3 is a schematic view of the reverse structure of the basic unit of the present invention;
FIG. 4 is a schematic cross-sectional view of the basic unit of the present invention;
wherein: 1-surface metal structure layer; 11-a first rectangular strip patch, 12-a second rectangular strip patch, 13-a third rectangular strip patch, 14-a fourth rectangular strip patch, 2-an upper dielectric sheet layer, 3-a lower metal structure layer, 31-a fifth rectangular strip patch, 32-a sixth rectangular strip patch, 33-a seventh rectangular strip patch, 34-an eighth rectangular strip patch, 4-a lower dielectric sheet layer, and 5-a bottom metal ground; a is the period side length of the basic unit; b is the length of the rectangular strip patch of the upper metal structure layer; c is the width of the rectangular strip patch; d is the space between the rectangular strip patches; e is the length of the rectangular strip patch of the lower metal structure layer; h is the thickness of the dielectric slab layer;
FIG. 5 is a performance structure of the basic unit of the present invention, in which: FIGS. 5 (a) and 5 (b) are simulation results of a super-surface unit under normal incidence y-polarized electromagnetic wave illumination; FIGS. 5 (c) and 5 (d) are simulation results of a super-surface unit under normal incidence x-polarized electromagnetic wave illumination.
Detailed Description
The present invention will be further described with reference to the following examples.
As shown in fig. 1-4, a high-efficiency super-surface unit with dual-polarization reflection phase control includes a surface metal structure layer 1, an upper dielectric plate layer 2, a lower metal structure layer 3, a lower dielectric plate 4) and a bottom metal ground 5, which are sequentially arranged from top to bottom; the surface metal structure layer 1 comprises a first rectangular strip patch 11, a second rectangular strip patch 12, a third rectangular strip patch 13 and a fourth rectangular strip patch 14, wherein the first rectangular strip patch 11, the second rectangular strip patch 12, the third rectangular strip patch 13 and the fourth rectangular strip patch 14 are parallel to each other and are vertically arranged; the lower metal structure layer comprises a fifth rectangular strip patch 31, a sixth rectangular strip patch 32, a seventh rectangular strip patch 33 and an eighth rectangular strip patch 34, the fifth rectangular strip patch 31, the sixth rectangular strip patch 32, the seventh rectangular strip patch 33 and the eighth rectangular strip patch 34 are parallel to each other, and the lower metal structure layer is placed horizontally.
The periodic side length a of the basic unit is 14-16 mm; the variation ranges of the lengths b of the first rectangular strip patch 11, the second rectangular strip patch 12, the third rectangular strip patch 13 and the fourth rectangular strip patch 14 are all 5.9-12.5mm, and the variation ranges of the lengths e of the fifth rectangular strip patch 31, the sixth rectangular strip patch 32, the seventh rectangular strip patch 33 and the eighth rectangular strip patch 34 are 6.2-8.55 mm; the widths c of the first rectangular strip patch 11, the second rectangular strip patch 12, the third rectangular strip patch 13, the fourth rectangular strip patch 14, the fifth rectangular strip patch 31, the sixth rectangular strip patch 32, the seventh rectangular strip patch 33 and the eighth rectangular strip patch 34 are all 1.4-1.6mm, and the distances d between the first rectangular strip patch 11, the second rectangular strip patch 12, the third rectangular strip patch 13 and the eighth rectangular strip patch 34 are all 2.15-2.35 mm; the thickness h of the upper dielectric slab layer 2 and the lower dielectric slab layer 4 is 0.9-1.1mm, the dielectric constant is 4.1-4.5, the loss tangent is 0.000-0.006, and the upper dielectric slab layer 2 and the lower dielectric slab layer 4 adopt the same medium.
As a preferable scheme, the periodic side length a of the basic unit is 15 mm; the variation ranges of the lengths b of the first rectangular long patch 11, the second rectangular long patch 12, the third rectangular long patch 13 and the fourth rectangular long patch 14 are all 6-12.4mm, and the variation ranges of the lengths e of the fifth rectangular long patch 31, the sixth rectangular long patch 32, the seventh rectangular long patch 33 and the eighth rectangular long patch 34 are 6.3-8.45 mm; the widths c of the first rectangular strip patch 11, the second rectangular strip patch 12, the third rectangular strip patch 13, the fourth rectangular strip patch 14, the fifth rectangular strip patch 31, the sixth rectangular strip patch 32, the seventh rectangular strip patch 33 and the eighth rectangular strip patch 34 are all 1.5mm, and the mutual distances d are all 2.25 mm; the thickness h of the upper dielectric slab layer 2 and the lower dielectric slab layer 4 is 1 mm.
The high-efficiency super-surface unit with dual-polarization reflection phase regulation has 4 basic unit states in total; under the irradiation of normal incidence x-polarization or y-polarization electromagnetic waves, 4 kinds of digital state codes with different phases can be independently generated, and the 4 kinds of digital state codes with different phases correspond to the sizes of the surface metal structure layer 1 and the lower metal structure layer 3 of the 4 basic units. Wherein, the 4 digital state codes are respectively '0', '1', '2' and '3', which respectively represent the reflection phase digital state under the normal incidence electromagnetic wave.
Specifically, in the working states of the 4 basic units, "0" corresponds to the lengths b of the first rectangular long patch 11, the second rectangular long patch 12, the third rectangular long patch 13, and the fourth rectangular long patch 14 being all 6mm, and the lengths e of the fifth rectangular long patch 31, the sixth rectangular long patch 32, the seventh rectangular long patch 33, and the eighth rectangular long patch 34 being all 6.3 mm; the length b of the first rectangular long patch 11, the second rectangular long patch 12, the third rectangular long patch 13 and the fourth rectangular long patch 14 corresponding to "1" is 7.2mm, and the length e of the fifth rectangular long patch 31, the sixth rectangular long patch 32, the seventh rectangular long patch 33 and the eighth rectangular long patch 34 is 7.04 mm; "2" corresponds to the lengths b of the first rectangular long patch 11, the second rectangular long patch 12, the third rectangular long patch 13 and the fourth rectangular long patch 14 being 8.02mm, and the lengths e of the fifth rectangular long patch 31, the sixth rectangular long patch 32, the seventh rectangular long patch 33 and the eighth rectangular long patch 34 being 7.44 mm; the length b of the first rectangular long patch 11, the second rectangular long patch 12, the third rectangular long patch 13 and the fourth rectangular long patch 14 corresponding to "3" is 12.4mm, and the length e of the fifth rectangular long patch 31, the sixth rectangular long patch 32, the seventh rectangular long patch 33 and the eighth rectangular long patch 34 is 8.45 mm.
As shown in fig. 5, when the center frequency is 8GHz, the super-surface unit can realize a reflection phase control range of about 270 ° under the irradiation of the y-polarized electromagnetic wave. Also under x-polarized electromagnetic wave illumination, adjacent digitally encoded super-surface elements are able to achieve a reflection phase difference of close to 90 °. This shows that the cell supports control of the reflected phase for x-and y-polarized incident waves. As can be seen from FIGS. 5 (b) and 5 (d), the reflection amplitudes of the units are both greater than-0.5 dB at 8GHz, which indicates that the super-surface unit can perform high-efficiency reflection on incident electromagnetic waves in two polarization directions.
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 (6)
1. A high efficiency super surface unit with dual polarization reflection phase control which characterized in that: the basic unit comprises a surface metal structure layer (1), an upper dielectric slab layer (2), a lower metal structure layer (3), a lower dielectric slab layer (4) and a bottom metal ground (5) which are sequentially arranged from top to bottom; the surface metal structure layer (1) comprises a first rectangular strip patch (11), a second rectangular strip patch (12), a third rectangular strip patch (13) and a fourth rectangular strip patch (14), wherein the first rectangular strip patch (11), the second rectangular strip patch (12), the third rectangular strip patch (13) and the fourth rectangular strip patch (14) are mutually parallel and are all vertically placed; the lower metal structure layer comprises a fifth rectangular strip patch (31), a sixth rectangular strip patch (32), a seventh rectangular strip patch (33) and an eighth rectangular strip patch (34), and the fifth rectangular strip patch (31), the sixth rectangular strip patch (32), the seventh rectangular strip patch (33) and the eighth rectangular strip patch (34) are parallel to each other and are all horizontally placed.
2. The base unit of claim 1, wherein: the periodic side length a of the basic unit is 14-16 mm; the variation ranges of the lengths b of the first rectangular strip patch (11), the second rectangular strip patch (12), the third rectangular strip patch (13) and the fourth rectangular strip patch (14) are all 5.9-12.5mm, and the variation ranges of the lengths e of the fifth rectangular strip patch (31), the sixth rectangular strip patch (32), the seventh rectangular strip patch (33) and the eighth rectangular strip patch (34) are 6.2-8.55 mm; the width c of the first rectangular long patch (11), the second rectangular long patch (12), the third rectangular long patch (13), the fourth rectangular long patch (14), the fifth rectangular long patch (31), the sixth rectangular long patch (32), the seventh rectangular long patch (33) and the eighth rectangular long patch (34) is 1.4-1.6mm, and the distance d between the first rectangular long patch and the second rectangular long patch is 2.15-2.35 mm; the thickness h of the upper dielectric plate layer (2) and the lower dielectric plate layer (4) is 0.9-1.1mm, the dielectric constant is 4.1-4.5, the loss tangent is 0.000-0.006, and the upper dielectric plate layer (2) and the lower dielectric plate layer (4) adopt the same medium.
3. The base unit of claim 1, wherein: the periodic side length a of the basic unit is 15 mm; the variation ranges of the lengths b of the first rectangular long patch (11), the second rectangular long patch (12), the third rectangular long patch (13) and the fourth rectangular long patch (14) are all 6-12.4mm, and the variation ranges of the lengths e of the fifth rectangular long patch (31), the sixth rectangular long patch (32), the seventh rectangular long patch (33) and the eighth rectangular long patch (34) are 6.3-8.45 mm; the widths c of the first rectangular long patch (11), the second rectangular long patch (12), the third rectangular long patch (13), the fourth rectangular long patch (14), the fifth rectangular long patch (31), the sixth rectangular long patch (32), the seventh rectangular long patch (33) and the eighth rectangular long patch (34) are all 1.5mm, and the distances d between the first rectangular long patch and the second rectangular long patch are all 2.25 mm; the thickness h of the upper dielectric plate layer (2) and the lower dielectric plate layer (4) is 1 mm.
4. The base unit of any one of claims 1-3, wherein: the high-efficiency super-surface unit with dual-polarization reflection phase regulation has 4 basic unit states in total; under the irradiation of normal incidence x-polarization or y-polarization electromagnetic waves, 4 digital state codes with different phases can be independently generated, and the 4 digital state codes with different phases correspond to the sizes of the surface metal structure layer (1) and the lower metal structure layer (3) of 4 basic units.
5. The super surface unit of claim 4, wherein: the 4 digital state codes are respectively '0', '1', '2' and '3', which respectively represent the reflected phase digital states under normal incidence electromagnetic waves.
6. The super surface unit of claim 4, wherein: in the working states of the 4 basic units, the lengths b of the '0' corresponding to the first rectangular long patch (11), the second rectangular long patch (12), the third rectangular long patch (13) and the fourth rectangular long patch (14) are all 6mm, and the lengths e of the fifth rectangular long patch (31), the sixth rectangular long patch (32), the seventh rectangular long patch (33) and the eighth rectangular long patch (34) are all 6.3 mm; "1" corresponds to the lengths b of the first rectangular long patch (11), the second rectangular long patch (12), the third rectangular long patch (13) and the fourth rectangular long patch (14) being 7.2mm, and the lengths e of the fifth rectangular long patch (31), the sixth rectangular long patch (32), the seventh rectangular long patch (33) and the eighth rectangular long patch (34) being 7.04 mm; "2" corresponds to the lengths b of the first rectangular long patch (11), the second rectangular long patch (12), the third rectangular long patch (13) and the fourth rectangular long patch (14) being 8.02mm, and the lengths e of the fifth rectangular long patch (31), the sixth rectangular long patch (32), the seventh rectangular long patch (33) and the eighth rectangular long patch (34) being 7.44 mm; "3" corresponds to the lengths b of the first rectangular long patch (11), the second rectangular long patch (12), the third rectangular long patch (13) and the fourth rectangular long patch (14) being 12.4mm, and the lengths e of the fifth rectangular long patch (31), the sixth rectangular long patch (32), the seventh rectangular long patch (33) and the eighth rectangular long patch (34) being 8.45 mm.
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| CN113690629A (en) * | 2021-08-23 | 2021-11-23 | 北京理工大学 | Transmission lens with independently regulated phase and amplitude and transmission array antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113690629A (en) * | 2021-08-23 | 2021-11-23 | 北京理工大学 | Transmission lens with independently regulated phase and amplitude and transmission array antenna |
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