CN110911849A - X-waveband circular polarization rotation direction regulator based on super surface - Google Patents
X-waveband circular polarization rotation direction regulator based on super surface Download PDFInfo
- Publication number
- CN110911849A CN110911849A CN201911156743.7A CN201911156743A CN110911849A CN 110911849 A CN110911849 A CN 110911849A CN 201911156743 A CN201911156743 A CN 201911156743A CN 110911849 A CN110911849 A CN 110911849A
- Authority
- CN
- China
- Prior art keywords
- super
- circularly polarized
- pattern layer
- metal pattern
- side arm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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 discloses a super-surface-based X-waveband circular polarization turning regulator, which comprises a plurality of super-surface units arranged in an array, wherein the size of the array is n X n; each super-surface unit comprises a bottom metal layer, a middle medium substrate layer and a metal pattern layer which are sequentially arranged from bottom to top, and the geometric centers of the bottom metal layer, the middle medium substrate layer and the metal pattern layer are positioned on the same central axis. Compared with the traditional circular polarization converter, the X-band circular polarization turning direction regulator has a simple structure and is easy to manufacture; the Z-shaped metal pattern layer is adopted, so that the excellent performance is shown when the metal pattern layer is vertically incident and is incident at a small angle, the excellent performance is also shown when the metal pattern layer is obliquely incident at a large angle, the tolerance on the incident angle is high, the selectivity of the angle can be increased on the premise of keeping the performance of an X wave band unchanged, the problem that the frequency band is extremely rapidly narrowed when the incident angle is larger than 30 degrees is solved, and the practical value is good.
Description
Technical Field
The invention belongs to the technical field of circularly polarized rotating direction equipment, and particularly relates to an X-band circularly polarized rotating direction regulator based on a super surface.
Background
Polarization is one of the basic characteristics of electromagnetic waves and can be divided into linear polarization, circular polarization and elliptical polarization. The circular polarization can be divided into left-hand circular polarization and right-hand circular polarization. Since linearly polarized waves of different orientations can be received by a circularly polarized antenna, the circularly polarized antenna plays an important role in communication systems such as satellites and rockets. With the diversification of application scenes, people hope to change the rotation direction of circularly polarized waves and realize the free regulation and control of polarization.
A metamaterial is a material that is artificially structured, with periodic arrangements of microcells. Different unit structures, materials and arrangement modes can realize different functions, and the design and the function customization are stronger. However, since the metamaterial is a three-dimensional structure, the processing of the sample is difficult. Considering factors such as volume, loss, processing and the like, an ultrathin two-dimensional planar hyperdielectric, namely a super surface, is developed later, and is easier to process and effectively regulate and control. At present, various types of polarization converters with each band based on a super surface are proposed in succession, however, circular polarization converters with the X band are still rare.
The existing circular polarization rotation direction converter based on metamaterials is complex in structure, and Chinese patent 'a circular polarization rotation direction regulator based on an adjustable super surface and a design method thereof' (application date: 20151010; application number: CN 201510654641.3; published date: 20190129; published number: CN105161858B) discloses a circular polarization rotation direction regulator consisting of a circular electric resonance (ELC) structure, a bias circuit and a PIN diode, which can realize polarization state conversion in different frequency bands through the state of a switch, but is complex in structure, low in frequency and narrow in bandwidth.
In addition, the existing polarization converters all have a common defect, and all can only work under the condition of normal incidence or a small incidence angle. For example, in 2017, a "High-efficiency wireless reflection polarization conversion for circular polarized waves" article was published in Journal of Applied Physics by huangxianjing et al, and a linear circular polarization converter was disclosed, in which when electromagnetic waves are vertically incident to the polarization converter, the rotation direction of circular polarization reflected waves is efficiently converted in a frequency band of 8.16GHz-15.32GHz, but when the incident angle is greater than 30 °, the band becomes extremely narrow and cannot be effectively controlled.
Disclosure of Invention
The invention aims to provide a super-surface-based X-waveband circularly polarized turning direction regulator, which solves the problems that the conventional circularly polarized wave regulator is complex in structure and narrow in band extreme speed when the incidence angle is larger than 30 degrees.
The technical scheme adopted by the invention is that the X-waveband circular polarization turning direction regulator based on the super surface comprises a plurality of super surface units which are arranged in an array, wherein the size of the array is n X n, and n is the number;
each super-surface unit comprises a bottom metal layer, a middle medium substrate layer and a metal pattern layer which are sequentially arranged from bottom to top, and the geometric centers of the bottom metal layer, the middle medium substrate layer and the metal pattern layer are positioned on the same central axis.
The present invention is also characterized in that,
the parameter n is more than or equal to 20.
The metal of the bottom layer is copper.
The bottom layer metal is specifically: the width and the length are not less than 10mm and not more than 10.6mm, and the thickness is not less than the skin depth plate body.
The intermediate dielectric substrate is epsilonr＝4.4、μrFR-4 material with a loss tangent tan delta of 0.025 at 1.
The intermediate medium substrate specifically comprises: the width and the length of the plate body are the same as the sizes of the bottom metal and the thickness of the plate body is 3.1 mm.
The metal pattern layer has a conductivity of 5.8 × 107The copper material of S/m is Z-shaped, and specifically comprises a long shaft with a rectangular cross section, wherein two ends of the long shaft are respectively and vertically connected with a side arm a and a side arm b, and the cross sections of the side arm a and the side arm b are square.
The long axis is distributed along any diagonal of the intermediate medium substrate, and the length of the long axis is not less than 2 times of the width of the long axis.
The side arm a and the side arm b are both parallel to the other diagonal of the middle medium substrate, and the side length is the same as the width of the long axis.
The invention has the beneficial effects that:
(1) compared with the traditional circular polarization converter, the X-waveband circular polarization turning direction regulator based on the super surface is simple in structure and easy to manufacture; the Z-shaped metal pattern layer is adopted, so that the excellent performance is shown when the metal pattern layer is vertically incident and is incident at a small angle, the excellent performance is also shown when the metal pattern layer is obliquely incident at a large angle, the tolerance on the incident angle is high, the selectivity of the angle can be increased on the premise of keeping the performance of an X wave band unchanged, the problem that the frequency band is extremely rapidly narrowed when the incident angle is larger than 30 degrees is solved, and the practical value is good.
(2) According to the X-waveband circular polarization turning direction regulator based on the super-surface, the circular polarization converter can change the turning direction of circular polarization reflected waves in a frequency band of 8.18GHz-13.988GHz, and shows excellent performance in an incident angle range of 0-85 degrees, so that the regulator has super-strong angle tolerance.
Drawings
FIG. 1 is a schematic structural diagram of a super-surface based X-band circularly polarized steering regulator according to the present invention;
FIG. 2 is a schematic structural diagram of a super-surface unit in the super-surface based X-band circularly polarized steering regulator according to the present invention;
FIG. 3 is a three-dimensional view of a super-surface unit in a super-surface based X-band circularly polarized steering regulator, wherein FIG. 3(a) is a front view, FIG. 3(b) is a side view, and FIG. 3(c) is a top view;
FIG. 4 is a graph of the reflection coefficient and polarization conversion ratio PCR with frequency at normal incidence to an X-band circularly polarized steering modulator of an embodiment of the present invention, where FIG. 4(a) is a variation of the reflection coefficient and FIG. 4(b) is a variation of the polarization conversion ratio PCR;
FIG. 5 is a graph showing the variation of the bandwidth and the incident angle of the X-band circularly polarized steering controller when the polarization conversion rate is greater than 0.9 according to the embodiment of the present invention;
FIG. 6 is a polarization conversion curve of a left-handed circularly polarized wave incident when the X-band circularly polarized steering controller according to an embodiment of the present invention has different incident angles;
fig. 7 is a polarization conversion rate curve of right-hand circular polarization incident when the X-band circular polarization steering controller of the embodiment of the present invention is at different incident angles.
In the figure, 1 is a bottom metal, 2 is an intermediate medium substrate, 3 is a metal pattern layer, 4 is a super surface unit, 5 is a long shaft, 6 is a side arm a, 7 is a side arm b.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention relates to a super-surface-based X-waveband circular polarization turning direction regulator, which comprises a plurality of super-surface units 4 arranged in an array as shown in figure 1, wherein the size of the array is n X n, and n is the number; as shown in fig. 2, each super-surface unit 4 includes a bottom metal layer 1, an intermediate dielectric substrate 2, and a metal pattern layer 3, which are arranged in sequence from bottom to top, and geometric centers of the bottom metal layer 1, the intermediate dielectric substrate 2, and the metal pattern layer 3 are located on the same central axis.
The parameter n is more than or equal to 20.
The bottom layer metal 1 is made of copper and is made of the same material as the metal pattern layer 3, and the purpose of the bottom layer metal is to ensure that electromagnetic waves cannot transmit; the bottom layer metal 1 is specifically: the width and the length are not less than 10mm and not more than 10.6mm, and the thickness is not less than the skin depth plate body.
The intermediate dielectric substrate 2 is epsilonr＝4.4、μrThe loss is small for FR-4 material with 1 and 0.025 loss tangent tan delta. The method specifically comprises the following steps: the intermediate medium substrate 2 is a plate body with the same width and length as the bottom metal 1 and the thickness of 3.1 mm.
The metal pattern layer 3 has a conductivity of 5.8 × 107The copper material of S/m is Z-shaped, and specifically comprises a long shaft 5 with a rectangular cross section, wherein two ends of the long shaft 5 are respectively and vertically connected with a side arm a6 and a side arm b7, and the cross sections of the side arm a6 and the side arm b7 are square.
The long axis 5 is distributed along any diagonal of the middle medium substrate 2, the long axis 5 is distributed along any diagonal of the middle medium substrate, and the length of the long axis 5 is not less than 2 times of the width of the long axis 5; the side arm a6 and the side arm b7 are both parallel to the other diagonal of the intermediate medium substrate 2, and have the same side length as the long axis width. The performance of the present invention may deteriorate when the length and width are changed.
Examples
Let X waveThe segment circular polarization turning direction regulator comprises a plurality of super surface units 4, the size of the array is n × n, and n is 20; the bottom layer metal 1 is made of copper; the intermediate dielectric substrate 2 is epsilonr＝4.4、μrFR-4 material with a loss tangent tan δ of 0.025 at 1; the metal pattern layer 3 has a conductivity of 5.8 × 107S/m copper material. The specific structure is shown in fig. 2.
Fig. 3(a) - (c), the bottom metal 1 and the intermediate dielectric substrate 2 have the same side length, both are p and p is 10.5 mm; the thickness hd of the bottom layer metal 1 is 0.3mm, and the thickness hm of the intermediate medium substrate 2 is 3.1 mm; the thickness hu of the metal pattern layer 3 is 0.035mm, the long axis 5 is arranged along a diagonal line from the upper left corner to the lower right corner of the substrate material, the long axis 5 is perpendicular to the side arm a6 and the side arm b7, the long axis 5 is rectangular, the length is 6mm, the width is 1.6mm, the side arm a6 and the side arm b7 are square, and the side length is 1.6 mm.
The performance of the X-band circularly polarized steering regulator in the following embodiment is subjected to simulation analysis:
and performing simulation analysis by using CST software, setting the x-y direction as a unit cell boundary condition, setting the z direction as an openand add space boundary condition, and enabling the electromagnetic wave to be incident along the z axis in a reverse direction.
The simulation calculation can obtain: as shown in FIG. 4(a), a reflection coefficient graph of a left-hand circularly polarized wave and a right-hand circularly polarized wave at normal incidence is shown, specifically, the reflection coefficient is plotted on the ordinate and the frequency is plotted on the abscissa, and the co-polarization reflection coefficient r is known--And r++Greater than 0.9 in the frequency band of 8.432GHz-13.036GHz, and the cross coefficient r-+And r+-Less than 0.2 in the range of 8.672GHz-13.508GHz, which shows that the polarizer realizes the regulation of the rotation direction of the circularly polarized wave. As shown in fig. 4(b), the plots of the polarization conversion rates when the left-hand circularly polarized wave and the right-hand circularly polarized wave are vertically incident are shown, wherein the ordinate is the polarization conversion rate, the abscissa is the frequency, and the curves with the solid dot marks and the triangular marks respectively represent the polarization conversion rates when the left-hand circularly polarized wave and the right-hand circularly polarized wave are incident, it can be seen that the polarization conversion rates in the two cases are almost completely overlapped, and the X-band is greater than 0.9 in the range of 8.18GHz-13.988GHz, so that efficient regulation and control can be realized.
The relationship of bandwidth to oblique incidence performance is discussed below. When different incidence angles are taken, numerical simulation can obtain the change of the bandwidth with the polarization conversion rate larger than 0.9 (the bandwidth mentioned below refers to the bandwidth with the polarization conversion rate larger than 0.9) along with the incidence angles, as shown in fig. 5, the horizontal axis is the incidence angle, and the vertical axis is the frequency, and it is found that the influence of the angle on the performance of the converter in the embodiment is different and the influence of the angle on the bandwidth is not monotonous change under two incidence modes of left-handed circular polarized wave and right-handed circular polarized wave; for right-hand circularly polarized waves, corresponding to the curve with the positive triangular mark in fig. 5, when the incident angle is less than 75 °, the bandwidth rapidly decreases with the increase of the angle, reaches the minimum value of 3.756GHz at 75 °, and when the incident angle continues to increase, the bandwidth rapidly increases; for left-handed circularly polarized waves, corresponding to the curve with the solid dot marks in fig. 5, the maximum value of 5.988GHz is obtained when the incident angle is about 30 °, and the bandwidth tends to decrease when the angle increases again, but the decreasing speed is slower, and the minimum value of 5.172GHz is obtained when the incident angle reaches 70 °, and the bandwidth increases when the incident angle increases again.
As shown in fig. 6, the polarization conversion curve for left-handed circularly polarized wave incidence at different incidence angles. For left-handed circularly polarized waves, five angles of incidence angles of 0 degree, 30 degrees, 45 degrees, 70 degrees and 85 degrees are respectively taken; as shown in fig. 7, the polarization conversion curve for right-hand to circularly polarized wave incidence is shown for different incidence angles. For right-hand circularly polarized waves, five angles of incidence angles of 0 degree, 30 degrees, 45 degrees, 75 degrees and 85 degrees are respectively adopted.
By contrast, it is known that the circular polarized wave exhibits good performance for two modes of the X band even at a large angle of incidence. For left-handed circularly polarized waves, the angle has little influence on the polarization conversion rate amplitude in the X wave band, and the bandwidth with the polarization conversion rate more than 0.9 is wider.
As can be seen from fig. 5, when the left-handed circularly polarized wave is incident, the bandwidth reaches the minimum value when the incident angle is equal to 70 °, and with reference to fig. 6, when the incident angle is equal to 70 °, the frequency band with the polarization conversion rate greater than 0.9 is 8.18GHz-11.84GHz, and the circular polarization rotation direction regulation within the frequency band range of 91.5% of the X band can still be realized; and at other angles, the bandwidth coverage is larger, and the effect is more excellent. For right-hand circularly polarized waves, the performance in the X-band is still good, although the bandwidth is narrow.
As can be seen from fig. 5, when the right-handed circularly polarized wave is incident, the bandwidth reaches the minimum value when the incident angle is equal to 75 °, and with reference to fig. 7, when the incident angle is equal to 75 °, the frequency band with the polarization conversion rate greater than 0.9 is 8.144GHz-11.792GHz, and the rotation direction regulation of the circularly polarized wave within the frequency band range of 91.2% of the X band can still be achieved; when the incident angle is larger than 75 °, the bandwidth of the polarization conversion rate larger than 0.9 in the X band is significantly increased, and the performance outside the X band becomes good.
In conclusion, the X-band circularly polarized wave modulator of the present invention has a large tolerance to the incident angle, and can increase the angle selectivity while maintaining the performance of the X-band.
Claims (8)
1. An X-waveband circular polarization turning direction regulator based on a super surface is characterized by comprising a plurality of super surface units (4) which are arranged in an array, wherein the size of the array is n X n, and n is the number;
each super surface unit (4) comprises a bottom metal (1), a middle medium substrate (2) and a metal pattern layer (3) which are sequentially arranged from bottom to top, and the geometric centers of the bottom metal (1), the middle medium substrate (2) and the metal pattern layer (3) are positioned on the same central axis.
2. The super-surface based X-band circularly polarized steering modulator according to claim 1, wherein said parameter n is greater than or equal to 20.
3. The super-surface based X-band circularly polarized steering modulator according to claim 1, wherein the bottom metal (1) is copper.
4. The super-surface-based X-band circularly polarized steering modulator according to claim 3, wherein the bottom metal (1) is specifically: the width and length dimensions are different and are not less than 10mm and not more than 10.6mm, and the thickness is not less than the skin depth plate body.
5. The super-surface based X-band circularly polarized steering modulator according to claim 1, wherein the intermediate dielectric substrate (2) is epsilonr＝4.4、μrFR-4 material with a loss tangent tan delta of 0.025 at 1.
6. The super-surface based X-band circularly polarized steering modulator according to claim 5, wherein the intermediate dielectric substrate (2) is a plate with a width and a length equal to the size of the bottom metal (1) and a thickness of 3.1 mm.
7. The super-surface based X-band circularly polarized steering modulator according to claim 1, wherein the metal pattern layer (3) has a conductivity of 5.8X 107S/m copper material is Z-shaped, and specifically comprises a long shaft (5) with a rectangular cross section, wherein two ends of the long shaft (5) are respectively and vertically connected with a side arm a (6) and a side arm b (7), and the cross sections of the side arm a (6) and the side arm b (7) are square.
8. The super-surface based X-band circularly polarized steering modulator according to claim 7, wherein the long axis (5) is distributed along any diagonal of the intermediate medium substrate (2), and the length of the long axis (5) is not less than 2 times the width of the long axis (5);
the side arm a (6) and the side arm b (7) are both parallel to the other diagonal of the middle medium substrate (2), and the side length is the same as the width of the long shaft (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911156743.7A CN110911849A (en) | 2019-11-22 | 2019-11-22 | X-waveband circular polarization rotation direction regulator based on super surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911156743.7A CN110911849A (en) | 2019-11-22 | 2019-11-22 | X-waveband circular polarization rotation direction regulator based on super surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110911849A true CN110911849A (en) | 2020-03-24 |
Family
ID=69818816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911156743.7A Pending CN110911849A (en) | 2019-11-22 | 2019-11-22 | X-waveband circular polarization rotation direction regulator based on super surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110911849A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113839216A (en) * | 2021-09-24 | 2021-12-24 | 山西大学 | Low-profile broadband circularly polarized antenna based on super surface |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009158279A1 (en) * | 2008-06-24 | 2009-12-30 | The University Of North Carolina At Chapel Hill | High fidelity through hole film, and associated method |
| CN106058481A (en) * | 2016-08-12 | 2016-10-26 | 电子科技大学 | Terahertz reflection-type polarization converter based on Z-shaped super surface |
-
2019
- 2019-11-22 CN CN201911156743.7A patent/CN110911849A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009158279A1 (en) * | 2008-06-24 | 2009-12-30 | The University Of North Carolina At Chapel Hill | High fidelity through hole film, and associated method |
| CN106058481A (en) * | 2016-08-12 | 2016-10-26 | 电子科技大学 | Terahertz reflection-type polarization converter based on Z-shaped super surface |
Non-Patent Citations (2)
| Title |
|---|
| 黄晓俊: "超材料调控电磁波极化特性研究", 《工程科技Ⅰ辑》 * |
| 黄晓俊等: "宽带高效反射电磁波极化调控超表面的实验研究", 《华中师范大学学报（自然科学版）》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113839216A (en) * | 2021-09-24 | 2021-12-24 | 山西大学 | Low-profile broadband circularly polarized antenna based on super surface |
| CN113839216B (en) * | 2021-09-24 | 2023-11-14 | 山西大学 | Low-profile broadband circularly polarized antenna based on super surface |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112201961B (en) | Dual-function super-surface integrated device based on amplitude and phase regulation and design method | |
| EP2688136B1 (en) | Metamaterial polarization converter | |
| CN211126083U (en) | X-band circularly polarized rotating direction regulator with strong angle tolerance | |
| CN1451189A (en) | Dielectric resonator antenna array with steerable elements | |
| CN106848598A (en) | A kind of low scattering high-gain fabry perot cavity antenna based on the super surface of coding | |
| CN110336136B (en) | Wave-absorbing/scattering integrated stealth metamaterial | |
| CN106602246B (en) | Frequency scan antenna based on microwave surface phasmon | |
| CN111064008A (en) | Multi-phase regulation and control integrated scattering wave-transparent integrated electromagnetic coding metamaterial | |
| CN107134659A (en) | High-gain orbital angular momentum array antenna based on multilayer acoustical panel | |
| CN105048100A (en) | 2-bit terahertz anisotropic electromagnetic coding meta-material and application thereof | |
| CN206236797U (en) | The polarization tracking device of grizzly bar shape linear polarized antenna | |
| CN110137689A (en) | A kind of circular polarizer that polarization is changeable | |
| CN110911849A (en) | X-waveband circular polarization rotation direction regulator based on super surface | |
| CN107394412B (en) | Five-frequency-band multiplexing artificial magnetic conductor reflecting plate | |
| CN205178013U (en) | Super material phased array antenna of wide angle beam scanning | |
| CN209804893U (en) | Low-profile high-gain reconfigurable monopole antenna | |
| CN108832304B (en) | Ultrahigh frequency two-phase modulation board with dual-polarized frequency selection surface and use method thereof | |
| CN104347952A (en) | Meta-material and antenna | |
| CN205194854U (en) | Super surperficial circular polarization ware of ultra wide band electromagnetism | |
| CN204793215U (en) | 2 - bit terahertz is super material of anisotropic electromagnetism code now | |
| CN111224242B (en) | Wave-absorbing and wave-transmitting integrated frequency selective surface with anisotropic wave-transmitting band | |
| CN107171076B (en) | Multi-band circular polarizer based on chiral super surface | |
| CN112909553A (en) | Circular polarization transmission array antenna unit based on rotation phase modulation method | |
| CN210957023U (en) | High-performance electromagnetic wave polarization controller based on super surface | |
| CN111555036B (en) | Broadband gradient phase implementation method and metamaterial |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200324 |