CN112290222B - Programmable anisotropic coded super surface - Google Patents
Programmable anisotropic coded super surface Download PDFInfo
- Publication number
- CN112290222B CN112290222B CN202011030749.2A CN202011030749A CN112290222B CN 112290222 B CN112290222 B CN 112290222B CN 202011030749 A CN202011030749 A CN 202011030749A CN 112290222 B CN112290222 B CN 112290222B
- Authority
- CN
- China
- Prior art keywords
- metal
- layer
- direct current
- variable capacitance
- capacitance diode
- 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.)
- Active
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
- H01Q15/0006—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
Abstract
A programmable anisotropic coded super surface comprises a super surface basic unit structure, an electrically adjustable variable capacitance diode, a 0 ohm overline resistor and a field programmable gate array; the basic unit structure consists of three metal layers, a first medium layer and a second medium layer are respectively arranged between the three metal layers at intervals, and the metal surface on the uppermost layer is arranged into a middle metal patch and four trapezoid metal patches which are separated from each other at the periphery and are attached to the surface of the first medium layer; the metal patch in the middle of the metal on the uppermost layer is connected with the metal back plate on the middle layer through the metal through holes to serve as a negative electrode of direct current feed, and the trapezoid metal patches separated from the periphery of the metal on the uppermost layer are respectively connected with the four square metal patches on the third layer through the four metal through holes to serve as a positive electrode of direct current feed; the varactor is welded between the uppermost layer of trapezoidal metal patch and the middle metal patch; the voltage at two ends of the variable capacitance diode is controlled by the FPGA; and changing the voltage difference between two ends of the variable capacitance diode to realize capacitance value switching.
Description
Technical Field
The invention relates to a programmable anisotropic coded super-surface design method, and belongs to the field of novel artificial electromagnetic devices.
Background
The novel artificial electromagnetic super surface (super surface for short) is an artificial composite electromagnetic material which is periodically or non-periodically arranged on a two-dimensional plane by a sub-wavelength unit structure. The modulation of the frequency, the amplitude, the phase and the polarization of electromagnetic waves can realize the functions of abnormal reflection, perfect stealth, diffuse reflection and the like, and the method has a plurality of applications in the aspects of high-efficiency lenses, holographic imaging, electromagnetic stealth, antenna design and the like. The programmable anisotropic coding super-surface can dynamically and independently control two orthogonal linear polarization electromagnetic waves in real time, realize the dynamic switching of the number and the angle of multiple beams, realize polarization multiplexing, and can be used for increasing the channel capacity of a signal transmission system.
Disclosure of Invention
The invention aims to realize a multifunctional programmable anisotropic coding super-surface design method for regulating and controlling the scattering property of free space electromagnetic waves. The super-surface is combined with a Field Programmable Gate Array (FPGA), so that two orthogonal linearly polarized electromagnetic waves can be controlled dynamically and independently in real time, and the dynamic switching of the number of multi-beam and the beam angle can be realized. The polarization multiplexing programmable anisotropic coding super-surface can effectively improve the regulation freedom degree of the dynamic adjustable super-surface and increase the channel capacity, and has a plurality of potential applications in the aspects of dynamic signal transmission, holographic imaging, arbitrary beam forming and the like; in particular to achieve feed isolation of both polarizations.
In order to realize the purpose, the invention adopts the following technical scheme: the programmable anisotropic coded super surface comprises a super surface basic unit structure, an electrically adjustable variable capacitance diode, a 0 ohm overline resistor and a Field Programmable Gate Array (FPGA); the super-surface basic unit structure consists of three metal layers, wherein a first medium layer and a second medium layer are respectively arranged between the three metal layers at intervals, and the metal surface on the uppermost layer is arranged into a middle metal patch and four trapezoid metal patches which are separated from each other at the periphery and are attached to the surface of the first medium layer; the metal patch in the middle of the metal on the uppermost layer is connected with the metal back plate on the middle layer through the metal through holes to serve as a negative electrode of direct current feed, and the trapezoid metal patches separated from the periphery of the metal on the uppermost layer are respectively connected with the four square metal patches on the third layer through the four metal through holes to serve as a positive electrode of direct current feed; the electrically adjustable variable capacitance diode in the x-direction is welded between the upper trapezoidal metal patch and the middle metal patch; the voltage at two ends of the electrically adjustable variable capacitance diode is controlled by the FPGA; the capacitance value switching is realized by changing the voltage difference between two ends of the variable capacitance diode, and then the phase distribution is regulated and controlled.
The programmable anisotropic coding super-surface is characterized in that a 0-ohm overline resistance is welded on a third metal layer on the back of a super-surface basic unit and used for connecting four square metal patches to serve as a feed circuit, and feed isolation of two polarizations is achieved.
And the 0 ohm overline resistance is welded on the surface of the third layer of metal to play a role of direct current feed.
The direct current feed positive electrodes of the variable capacitance diodes in the x-direction are directly connected by metal thin strips; the direct current feed positive pole of the y-direction variable capacitance diode is formed by connecting the trapezoid metal patches separated from the periphery of the uppermost layer of metal with a 0 ohm jumper resistor in a combined mode through a metal thin strip, so that the y-direction direct current feed and the x-direction feed are electrically isolated, namely when direct current bias voltage is applied to the y-direction variable capacitance diode, the direct current feed of the x-direction variable capacitance diode is not changed, and the direct current feed of the x-direction variable capacitance diode is independently controlled through the x-direction direct current feed; and vice versa. In actual operation, voltages at two ends of the variable capacitance diode are controlled by the FPGA, capacitance value switching is realized by changing voltage difference at two ends of the variable capacitance diode, phase distribution is regulated, and various complex wave beam regulation functions such as single wave beam, double wave beam, random scattering, wave beam scanning and the like are realized in a dual-polarization state.
The programmable anisotropic coding super surface is characterized in that 0 ohm overline resistance is welded on the back of a super surface basic unit to serve as a feed circuit, and feed isolation of two polarizations can be achieved.
And the 0 ohm overline resistance is welded on the surface of the third layer of metal to play a role of direct current feed. The positive direct current feed electrodes of the varactor diodes in the x-direction are directly connected by a metal strip. The direct current feed positive pole of the y-direction variable capacitance diode is combined and connected with a 0 ohm overline resistor by a metal thin strip, so that the y-direction direct current feed and the x-direction feed are electrically isolated, namely when the y-direction variable capacitance diode is applied with direct current bias voltage, the direct current feed of the x-direction variable capacitance diode is not changed, and the direct current feed of the x-direction variable capacitance diode is independently controlled by the x-direction direct current feed; and vice versa. In actual operation, voltages at two ends of the variable capacitance diode are controlled by the FPGA, capacitance value switching is realized by changing voltage difference at two ends of the variable capacitance diode, phase distribution is regulated, and various complex wave beam regulation functions such as single wave beam, double wave beam, random scattering, wave beam scanning and the like are realized in a dual-polarization state.
Has the advantages that: compared with the prior art, the invention has the following advantages:
1. polarization multiplexing: the programmable anisotropic coding super-surface can realize various complex beam regulation functions such as single beam, double beams, random scattering, beam scanning and the like in a dual-polarized state.
2. Function reconfiguration: the programmable anisotropic coding super-surface is combined with a Field Programmable Gate Array (FPGA), so that two orthogonal linearly polarized electromagnetic waves can be controlled dynamically and independently in real time, and the dynamic switching of the number of multi-beam and the beam angle can be realized.
3. The regulation freedom degree of the dynamic adjustable super surface is effectively improved, and the channel capacity in the dynamic signal transmission process is increased. The design of the programmable anisotropic coding super-surface can dynamically and independently control two orthogonal linearly polarized electromagnetic waves in real time, realize the dynamic switching of the number and the angle of the multi-beam and realize polarization multiplexing.
4. Feed isolation of both polarizations is achieved. The polarization multiplexing programmable anisotropic coding super-surface can effectively improve the regulation freedom degree of a dynamic adjustable super-surface and increase the channel capacity, and has a plurality of applications in the aspects of dynamic signal transmission, holographic imaging, arbitrary beam forming and the like.
Drawings
FIG. 1 is a programmable anisotropic encoded meta-surface design with an inset of a basic cell structure;
FIG. 2 is a design diagram of a basic cell structure, wherein (a) the first dielectric layer is hidden, FIGS. 2(b) - (d) are the planar structure diagrams of three layers of metal, and (e) is the equivalent circuit of a varactor; the second layer of dielectric is also not shown.
FIGS. 3(a) and (b) are the reflection phase and reflection coefficient, respectively, of the cell;
FIG. 4 is a two-dimensional far-field scatter pattern of a 1-bit coded metasurface at different polarization states, (a) - (c) corresponding to different code sequences, resulting in different scatter fields;
FIG. 5 is a graph of cell reflection phase versus capacitance for a varactor in the x-direction for a 2-bit encoded meta-surface in the x-polarization state;
FIG. 6 is a graph of a test relationship between the phase of the super-surface reflection and the bias voltage;
FIG. 7 is a graph of test results for a 1-bit encoded super surface;
Detailed Description
The invention is further described with reference to specific embodiments and the accompanying drawings.
The programmable anisotropic coded super surface consists of a basic unit structure, and the reference numbers are as follows:
in the figure, 1-intermediate metal patch; 2-trapezoidal metal patch; 3-a metal back plate; 4-a third layer of square metal patches; 5-0 ohm flying resistor 6-varactor.
The variable capacitance diode comprises an electrically adjustable variable capacitance diode 6, a 0 ohm overline resistor and a Field Programmable Gate Array (FPGA), wherein the voltage difference at two ends of the variable capacitance diode is controlled by controlling the output level of the FPGA so as to realize capacitance value switching, and further regulate and control phase distribution. And a 0 ohm overline resistor 5 is welded on the back surface of the unit and is used as a direct current feed circuit, so that feed isolation of two polarizations can be realized. The super-surface basic unit structure consists of three layers of metal two-layer media, as shown in figure 2. In order to facilitate clear observation of the internal structure of the cell, the first dielectric layer is hidden in fig. 2(a), and fig. 2(b) - (d) are plan view structures of three metal layers. The middle square metal patch 1 of the first layer of metal (figure 2(b)) is connected with the second layer of metal back plate 3 through metal through holes to be used as a negative electrode of direct current feed, the four separated trapezoidal metal patches 2 are connected with the square metal patch 4 of the third layer through four metal through holes at the periphery to be used as a positive electrode of direct current feed, and the four metal through holes at the periphery are isolated from the second layer of metal back plate 3 through digging round metal patches with the radius of 0.5mm at the periphery of the metal through holes. The electrically adjustable variable capacitance diode is welded between the first layer of trapezoidal metal patch 2 and the middle square metal patch 1. And the 0 ohm overline resistor 5 is welded on the surface of the third layer of metal and plays a role in direct current feeding. The positive direct current feed electrodes of the varactor diodes in the x-direction are directly connected by a metal strip.
The positive electrode of the direct current feed of the y-direction variable capacitance diode is combined and connected with a 0 ohm overline resistor 5 through a metal thin strip 6, so that the y-direction direct current feed and the x-direction feed are electrically isolated, namely when direct current bias voltage is applied to the y-direction variable capacitance diode, the direct current feed of the x-direction variable capacitance diode is not changed, and the direct current feed of the x-direction variable capacitance diode is independently controlled by the x-direction direct current feed; and vice versa. In actual operation, voltages at two ends of the variable capacitance diode are controlled by the FPGA, capacitance value switching is realized by changing voltage difference at two ends of the variable capacitance diode, phase distribution is regulated, and various complex wave beam regulation functions such as single wave beam, double wave beam, random scattering, wave beam scanning and the like are realized in a dual-polarization state.
In the design of the coded super-surface, 1-bit coding adopts two code elements of '0' and '1', which respectively represent the reflection phase of 0 degrees and 180 degrees and the phase difference between the units is 180 degrees; the 2-bit coding comprises four coding units of '00', '01', '10' and '11', and the four coding units respectively correspond to reflection phases of 0 DEG, 90 DEG, 180 DEG and 270 DEG, and have a phase difference of 90 DEG between the units. By analogy, an N-bit coded super-surface comprises 2NCoding units with a phase difference of 360 DEG/2 between the unitsN. To further illustrate the programmable anisotropic coded super surface design method, 1-bit and 2-bit coded super surfaces are designed, and the functions of the coded super surfaces are simulated and tested.
Based on the above unit design, we simulate the unit structure with commercial software CST. The unit structure adopts a periodic boundary condition in the circumferential direction and is set as an open boundary in the longitudinal direction. The varactor is of a model SMV1405-079LF, and an equivalent circuit model is shown in fig. 2(e), where an equivalent resistance R is 0.8 Ω, an equivalent inductance L is 0.7nH, and a capacitance value varies with a bias voltage. When the bias voltage is changed from-30V to 0V, the capacitance value C of the varactor diodeT0.63-2.67 pF. The unit structure period p is 25mm, the thickness h is 3.554mm, and other structure parameters are h1＝0.5mm，t＝0.018mm，a＝21.58mm，b＝5.5mm，c＝9.2mm，w＝10mm，w13mm, 1mm, 0.5mm, and r 13 mm. The metal is selected to have a conductivity of 5.8 × 107S/m copper, F-4B (polytetrafluoroethylene) as a medium, 2.2 of dielectric constant and 0.001 of loss tangent.
First, 1-bit programmable anisotropic coded super-surface design is performed. The phase difference between the 1-bit coded super-surface units satisfies 180 deg. In order to realize function reconfiguration under the dual polarization state, four basic coding units '0/0', '0/1', '1/0' and '1/1' are defined, and respectively represent that the reflection phases are 0 °/0 °, 0 °/180 °, 180 °/0 ° and 180 °/180 °. Wherein the front and back of the slash "/" respectively represent the encoding state and the reflection phase of the cell structure in the x-polarization and y-polarization states. According to the equivalent circuit of the varactor and the electrical adjustable characteristic of the diode, when the capacitance values in the x direction and the y direction of the unit are set to be 1.5pF/1.5pF, the encoding unit '0/0' can be realized at the working frequency point of 3.7 GHz. When the capacitance values of the x-direction and the y-direction of the unit are changed into 1.5pF/1.1pF,1.1pF/1.5pF and 1.1pF/1.1pF, the coding units '0/1', '1/0' and '1/1' are sequentially realized. It is noted that 0 ° and 180 ° do not represent the absolute reflected phase of the cell, and that a 1-bit coded metasurface design can be implemented as long as the two cell states satisfy a phase difference of 180 °. The reflection coefficient and reflection phase curve of the unit structure is shown in fig. 3. At the working frequency point of 3.7GHz, the phase difference between the coding units 1 and 0 is approximately 180 degrees, the amplitude is more than 0.8, and the coding states of the units under the x polarization and the y polarization are independent. That is, the change in capacitance in the x-direction does not affect the reflection phase of the cell in the y-polarization state, and vice versa.
To verify the functionality of the programmable anisotropically encoded super-surface, we used a 16 × 16 basic cell structure to form a total size of 400 × 400mm2And full-wave simulation verification is performed by using commercial software CST. In simulation, the surrounding boundary condition is set as an open boundary, and excitation is plane wave. When excited by x-polarized waves, the functions of single beam, dual beam and random scattering can be realized, as shown in fig. 4. In the case of y-polarization, when the code is varied along the x-direction, a dual beam can be produced at plane xoz, as shown in FIG. 4. And changing the coding sequence, the included angle theta between the double beams and the z axis is changed, and the angle theta is defined as the deflection angle of the double beams. The deflection angle theta satisfies theta-sin-1(λ/Γ), where λ is the free space wavelength and Γ is the period length of the encoded sequence. In the y-polarization state, the encoding period Γ is set to 150mm, 200mm and 250mm respectively, and fig. 4(a) - (c) are two-dimensional far-field scattering patterns of the xoz plane under different encoding periods, at which the dual-beam deflection angles are 33 °, 24 ° and 19 °, respectively, which are consistent with theoretical values.
In order to further verify the strong regulation and control capability of the programmable anisotropic coding super surface of the invention on electromagnetic waves, a 2-bit coding super surface is also designed and realized. Compared with a 1-bit coding super surface, the 2-bit anisotropic coding super surface needs to define four basic coding states of '00', '01', '10' and '11' under x-polarization and y-polarization respectively, so that the working states of 16 units need to be designed. The capacitance value of the variable capacitance diode can be continuously changed along with the direct current bias voltage, so that the continuous change of the reflection phase is realized. When the varactor capacitance values are 1.70pF, 1.37pF, 1.20pF, and 0.75pF, a complete 2-bit encoded super surface can be constructed. Since the change in y-direction capacitance does not affect the reflection phase of the cell under x-polarization, FIG. 5 only shows the curve of the cell reflection phase as a function of the change in x-direction varactor capacitance in the x-polarization state. It can be seen from the figure that at 3.7GHz, the four encoding states reflect approximately 90 ° out of phase. Therefore, the basic unit structure can be used for constructing a 2-bit programmable anisotropic coded super surface, and the upper half-space single-beam scanning can be realized by optimizing the coded sequence, and design examples are not given here. The analysis proves that the programmable anisotropic coded super-surface can be designed to complete different functions under the x and y polarization states, realize polarization multiplexing and greatly increase the channel capacity.
Finally, as experimental verification, the sample was processed and manufactured by the PCB process. The super-surface sample consists of 16 × 16 basic units and has a total size of 400 × 400mm2The varactor is of the type SMV1405-079LF, the 0 ohm over-line resistor is packaged in the form of 0603, and the varactor is welded to the back of the unit and is used as direct current feed and dual-polarization feed isolation. The capacitance of the varactor can be continuously varied from 0.63pF to 2.67pF when the dc bias voltage is varied from-30V to 0V. In the experimental process, the super surface is combined with a Field Programmable Gate Array (FPGA), and the voltage difference at two ends of the variable capacitance diode is controlled by controlling the output level of the FPGA so as to change the capacitance value of the variable capacitance diode. FIG. 6 is a graph of the relationship between the super-surface reflection phase and bias voltage. The reflecting phase under dual polarization is changed along with the bias voltage due to slight deviation of direct current feed in the x-direction and the y-directionThe formation curves are not too coincident, which is mainly due to the difference caused by the direct current feeding mode. We have described above that the dc feed voltage for the x-direction varactor is supplied directly by the metal strip 6, whereas for dc feed isolation in both directions the y-direction varactor is fed by the combination of the metal strip 6 and the 0 ohm resistor 5, which makes the reflected phases in both directions slightly different. Quantitative analysis shows that the phase difference value of the two curves is less than 10 degrees, and the working state of the super-surface is hardly influenced. That is to say, the programmable anisotropic coded super-surface can effectively realize effective feeding to the variable capacitance diodes in two directions (x/y-direction) and perform effective direct current feeding isolation by welding 0 ohm over-line resistance on the back of the unit. In fig. 6, when the dc bias voltage is-1V and-6V, the cell phase difference satisfies 180 °, 1-bit encoding can be realized; for the 2-bit case, the DC bias voltages are set to-1V, -4V, -6V, and-17V, respectively. The samples were tested in a microwave standard dark room. During testing, the transmitting horn antenna and the receiving horn antenna are respectively connected to two ends of the vector network analyzer, and the receiving horn can freely move along the arched mechanical track to measure the half-space scattering field on the super surface. FIG. 7 shows the measurement results of the 1-bit coded super surface, and the coded sequence is written into the super surface sample through FPGA. Experimental results prove that the method can realize a dual-beam scanning function under the x/y-polarization condition, the beam deflection angle is well matched with simulation results, and the accuracy of the anisotropic super-surface design method provided by the invention is proved. Based on the above discussion, the programmable anisotropic coded super-surface has strong regulation and control capability on free space electromagnetic waves, can dynamically and independently control two orthogonal linearly polarized electromagnetic waves in real time, realizes dynamic switching of the number of multiple beams and beam angles, and realizes polarization multiplexing.
The above examples are only preferred embodiments of the present invention, it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several modifications and equivalents may be made, such as implementing other functions of focusing and vortex wave in dual polarization state, or designing polarization insensitive programmable super surface and changing diode type, etc., and these modified and equivalent technical solutions for the claims of the present invention all fall within the protection scope of the present invention.
Claims (1)
1. A programmable anisotropic coded super surface is characterized by comprising a super surface basic unit structure, an electrically adjustable variable capacitance diode, a 0 ohm overline resistor and a field programmable gate array; the super-surface basic unit structure consists of three metal layers, wherein a first medium layer and a second medium layer are respectively arranged between the three metal layers at intervals, and the metal surface on the uppermost layer is arranged into a middle metal patch and four trapezoid metal patches which are separated from each other at the periphery and are attached to the surface of the first medium layer; the metal patch in the middle of the metal on the uppermost layer is connected with the metal back plate on the middle layer through the metal through holes to serve as a negative electrode of direct current feed, and the trapezoid metal patches separated from the periphery of the metal on the uppermost layer are respectively connected with the four square metal patches on the third layer through the four metal through holes to serve as a positive electrode of direct current feed; the electrically adjustable variable capacitance diode is welded between the upper trapezoidal metal patch and the middle metal patch; the voltage at two ends of the electrically adjustable variable capacitance diode is controlled by the FPGA; the capacitance value switching is realized by changing the voltage difference between two ends of the variable capacitance diode, so that the phase distribution is regulated and controlled;
basic unit structure periodp= 25mm, thicknessh= 3.554 mm; the other structural parameters are respectively: second layer dielectric thicknessh 1 =0.5 mm, single layer metal thicknesst = 0.018 mm, long side of trapezoidal metal patcha = 21.58 mm, heightb = 5.5 mm, distance of metal through hole from center of cellc = 9.2 mm, side length of intermediate metal patchw=10 mm, size of square metal patch on third layerw 1 = 3mm, size of gap between trapezoidal metal patches of upper layer structureg= 1mm, radius of metal round hole etched by metal back plater=0.5 mm, and radius of metal viar 1 = 3 mm；
In the programmable anisotropic coding super surface, a 0 ohm overline resistance is welded on a third metal layer on the back of a super surface basic unit and is used for connecting four square metal patches as a feed circuit to realize feed isolation of two polarizations;
the 0 ohm overline resistance is welded on the surface of the third layer of metal, and the function of direct current feed is achieved; the 0 ohm overline resistance is used as a direct current feed circuit under two polarizations, and has the effect of direct current isolation;
xthe direct-current feed anodes of the directional varactors are directly connected by a metal strip;ythe direct current feed positive electrode of the directional variable capacitance diode is formed by connecting a trapezoidal metal patch with a 0 ohm overline resistor in a combined manner by a metal thin strip and separating the periphery of the uppermost metalyEffective direct current feeding in the direction andxthe directional feed being electrically isolated, i.e. pairedyThe direct-current bias voltage applied to the directional varactor is not changedx-a direct current feed of a directional varactor,x-direct current feeding of directional varactors byx-independent control of the directional dc feeds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011030749.2A CN112290222B (en) | 2020-09-27 | 2020-09-27 | Programmable anisotropic coded super surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011030749.2A CN112290222B (en) | 2020-09-27 | 2020-09-27 | Programmable anisotropic coded super surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112290222A CN112290222A (en) | 2021-01-29 |
| CN112290222B true CN112290222B (en) | 2021-10-08 |
Family
ID=74421463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011030749.2A Active CN112290222B (en) | 2020-09-27 | 2020-09-27 | Programmable anisotropic coded super surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112290222B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113726381B (en) * | 2021-08-30 | 2022-10-18 | 上海无线电设备研究所 | Dynamic beam scanning transmission type coding super-surface array |
| CN113991311B (en) * | 2021-09-03 | 2022-09-23 | 南京大学 | Time-coded super surface for generating arbitrary polarization |
| CN114267952B (en) * | 2021-12-31 | 2022-09-30 | 湖南大学 | 1bit dual-polarization digital coding unit and beam scanning array antenna system |
| CN115480325A (en) * | 2022-10-10 | 2022-12-16 | 成都信息工程大学 | Liquid immersion super surface for strong polarization light field regulation and control and design method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58102535A (en) * | 1981-12-15 | 1983-06-18 | Fujitsu Ltd | Electrode resistance evaluation method for micro-electrode |
| JP2008204684A (en) * | 2007-02-19 | 2008-09-04 | Matsushita Electric Ind Co Ltd | Jumper chip component and its manufacturing method |
| CN102308436A (en) * | 2008-11-19 | 2012-01-04 | 泰科电子服务股份有限公司 | Tunable metamaterial antenna structures |
| CN204375902U (en) * | 2015-01-30 | 2015-06-03 | 深圳光启高等理工研究院 | A kind of power splitter |
| CN104900212A (en) * | 2015-07-01 | 2015-09-09 | 友达光电股份有限公司 | Wiring structure for GOA (Gate driver On Array) circuit |
| CN110797666A (en) * | 2019-11-05 | 2020-02-14 | 南京邮电大学 | Wave absorber regulated and controlled by gravity field and frequency selection function reconfigurable device |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5920292A (en) * | 1996-12-20 | 1999-07-06 | Ericsson Inc. | L-band quadrifilar helix antenna |
| WO1999066501A1 (en) * | 1998-06-15 | 1999-12-23 | Seagate Technology Llc | Disc drive having charge feedback driven microactuator |
| CN102324623B (en) * | 2011-08-31 | 2014-05-28 | 华南理工大学 | Dual-band biorthogonal phase output power division feed network |
| US9785300B2 (en) * | 2013-06-05 | 2017-10-10 | Spreadtrum Communications (Shanghai) Co., Ltd. | Touch detection method and device |
| CN103794879B (en) * | 2014-01-23 | 2016-02-03 | 电子科技大学 | The miniaturized H face omnidirectional scanning beam switchable antenna perpendicular to antenna plane |
| CN103872454B (en) * | 2014-03-25 | 2016-02-03 | 电子科技大学 | For the anti-multipath jamming antenna of GNSS |
| EP2927756A1 (en) * | 2014-04-03 | 2015-10-07 | ETA SA Manufacture Horlogère Suisse | Clock movement provided with a drive mechanism for an analogue indicator with periodic or intermittent movement |
| CN204803655U (en) * | 2015-04-08 | 2015-11-25 | 王军 | Steam boiler assembly for electric iron that has water level monitoring vocal music prompt facility |
| JP2019057832A (en) * | 2017-09-21 | 2019-04-11 | 株式会社フジクラ | Antenna device |
-
2020
- 2020-09-27 CN CN202011030749.2A patent/CN112290222B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58102535A (en) * | 1981-12-15 | 1983-06-18 | Fujitsu Ltd | Electrode resistance evaluation method for micro-electrode |
| JP2008204684A (en) * | 2007-02-19 | 2008-09-04 | Matsushita Electric Ind Co Ltd | Jumper chip component and its manufacturing method |
| CN102308436A (en) * | 2008-11-19 | 2012-01-04 | 泰科电子服务股份有限公司 | Tunable metamaterial antenna structures |
| CN204375902U (en) * | 2015-01-30 | 2015-06-03 | 深圳光启高等理工研究院 | A kind of power splitter |
| CN104900212A (en) * | 2015-07-01 | 2015-09-09 | 友达光电股份有限公司 | Wiring structure for GOA (Gate driver On Array) circuit |
| CN110797666A (en) * | 2019-11-05 | 2020-02-14 | 南京邮电大学 | Wave absorber regulated and controlled by gravity field and frequency selection function reconfigurable device |
Non-Patent Citations (1)
| Title |
|---|
| Active Anisotropic Coding Metasurface with Independent Real-Time Reconfigurability for Dual Polarized Waves;Ke Chen;《ADVANCED MATERIALS TECHOLOGIES 》;20191219;正文下标第1-8页，图1-4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112290222A (en) | 2021-01-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112290222B (en) | Programmable anisotropic coded super surface | |
| Xu et al. | Dual-mode transmissive metasurface and its applications in multibeam transmitarray | |
| Sievenpiper et al. | Two-dimensional beam steering using an electrically tunable impedance surface | |
| DE602005002187T2 (en) | Medium with controllable refractive properties | |
| Wang et al. | Wideband Fabry-Perot resonator antenna with two complementary FSS layers | |
| Sievenpiper et al. | A tunable impedance surface performing as a reconfigurable beam steering reflector | |
| Clemente et al. | 1-Bit reconfigurable unit cell based on PIN diodes for transmit-array applications in $ X $-Band | |
| CN106299717B (en) | Microwave band programmable 1-bit anisotropic super surface | |
| RU2705941C1 (en) | Ferrite reinforced with metamaterial | |
| CN100561797C (en) | A kind of negative refracting power microwave medium material and preparation method thereof | |
| Lee et al. | Design of novel thin frequency selective surface superstrates for dual-band directivity enhancement | |
| MX2011001903A (en) | Metamaterials for surfaces and waveguides. | |
| CN110703463B (en) | Reconfigurable optical transparent basic unit and super surface | |
| CN110034410B (en) | Multifunctional nonlinear super surface | |
| CN113067163B (en) | Full-space programmable digital coding metamaterial and control method thereof | |
| CN105552569A (en) | Ultra-thin transmission gradient super-surface-based polarization separator | |
| Das et al. | Free-space focusing at C-band using a flat fully printed multilayer metamaterial lens | |
| Kakhki et al. | Dual complementary source magneto-electric dipole antenna loaded with split ring resonators | |
| Dawar et al. | Bandwidth enhancement of RMPA using ENG metamaterials at THz | |
| CN103579773A (en) | Metamaterial, radome with same and antenna system | |
| Niu et al. | Dual-band and dual-polarized programmable metasurface unit with independent channels | |
| CN116191047A (en) | Space-time coding electromagnetic super-surface with polarization and scattering pattern combined regulation and control | |
| Nguyen et al. | A two-bit reflectarray element using cut-ring patch coupled to delay lines | |
| Weng et al. | Design and experiment of one dimension and two dimension metamaterial structures for directive emission | |
| Elmansouri et al. | Wide-Angle Flattened Luneburg Lens for Millimeter-Wave Beam Steering Applications |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |