CN110797666A - Wave absorber regulated and controlled by gravity field and frequency selection function reconfigurable device - Google Patents
Wave absorber regulated and controlled by gravity field and frequency selection function reconfigurable device Download PDFInfo
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- CN110797666A CN110797666A CN201911069689.2A CN201911069689A CN110797666A CN 110797666 A CN110797666 A CN 110797666A CN 201911069689 A CN201911069689 A CN 201911069689A CN 110797666 A CN110797666 A CN 110797666A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
- H01Q17/007—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems with means for controlling the absorption
Abstract
The invention discloses a gravity field regulated wave absorber and a frequency selection function reconfigurable device, which comprise a bottom layer metal reflecting plate and a medium structure above the metal plate, wherein three layers of metal resonance structures are arranged on the surface, the inside and the bottom layer of the medium structure, and a communicating part is arranged between the surface and the inside and can be used for supplying silver to flow. The surface metal resonance structure is connected by a resistor, and a layer of glass medium covers the surface of the medium structure. Through special design, the position of mercury is changed under the action of a gravity field by rotating the device, so that the device fundamentally changes in the property of the device and is switched between an ultra-wideband wave absorber and frequency selection. The invention uses a simple operation means, and realizes the purpose of convenient regulation and control only by rotating the device. The processing material of the device is easy to obtain, and the device is small and exquisite, flexible in design and wide in application scene.
Description
Technical Field
The invention relates to a device, in particular to a wave absorber regulated by a gravity field and a frequency selection function reconfigurable device, and belongs to the field of radio communication and microwave devices.
Background
As an emerging periodic material based on artificial synthesis, meta-materials are often used for perfect imaging or for making wave absorbers, frequency selection, etc. because they have many novel properties, such as negative reflectivity, negative refractive index, etc., which generate many physical phenomena that are not conceivable. The metamaterial wave absorber is generally composed of units which are periodically arranged, has a small physical size, can absorb electromagnetic waves of a specific frequency band in the forms of electric resonance and magnetic resonance, and is further developed recently to be used for various civil and military fields such as electromagnetic interference prevention, electromagnetic stealth and the like. The wave absorber can be used as a new military device, can be used as a surface coating of various vehicles and weapons in the military, can be hidden in the radar detection, can prevent the opposite side from detecting the personnel of the opposite side, has high military value, and can also be used for reducing RCS of various flying units such as missiles and the like. In the civil field, a large number of electronic products need to work under the condition of no electromagnetic interference, and a small-sized wave absorber can effectively meet the requirements in the aspects of detection, medical treatment and the like, and particularly avoids unnecessary electromagnetic interference in the communication field to further improve the communication quality. As a metamaterial device, the single-frequency point and narrow-band absorption and selection cannot meet the requirements of current development, so that the requirement of an ultra-wideband device is met, the current device lacks efficient frequency regulation and control means, the temperature or a centralized original piece is inconvenient to regulate and control, the actual application range of the device is limited to a great extent, other means are not needed for gravity field regulation and control, and great advantages are achieved in the convenience of regulation and control.
Disclosure of Invention
The invention aims to solve the technical problem of providing a wave absorbing device for gravitational field regulation and a reconfigurable device with frequency selection function, and realizing dynamic regulation and control of device types by using a simple gravitational field regulation and control means and rotating the device.
The invention adopts the following technical scheme for solving the technical problems:
the invention provides a gravity field regulated wave absorber and a frequency selection function reconfigurable device, which comprises a bottom layer metal reflecting plate and a medium structure above the metal plate, wherein three layers of metal resonance structures are arranged on the surface, the inside and the bottom layer of the medium structure, a communicating part is arranged between the surface and the inside, and the position of mercury is changed under the action of a gravity field by rotating the device, so that the dynamic regulation and control of the property of the device are realized.
The switching technology of the wave absorber and frequency selection function reconfigurable device based on the gravity field regulation and control ultra-wide band wave absorber and the gravity field regulation and control uses a convenient regulation and control means, and the switching between the ultra-wide band wave absorber and the frequency selection can be realized by rotating the device, so that the property of the device is changed, and the convenience of the regulation and control means is realized. The processing material of the device is easy to obtain, and the device is small and exquisite, flexible in design and wide in application scene.
As a further technical scheme of the invention, the device is provided with a pipeline for mercury to flow in the center of a medium structure between the surface metal resonance structure and the middle layer metal resonance structure.
The invention also provides a glass cover plate, wherein the glass cover plate is provided with a plurality of metal structures, the metal structures on the surface are connected with each other through micro resistors, the metal structures on the middle layer are provided with grooves for storing mercury, the metal structures on the surface are connected with each other through micro resistors, a part of mercury flows out after the micro resistors are attached to the glass cover plate, the grooves for storing the mercury are reserved between the metal structures on the middle layer, the volumes of the mercury stored in the two grooves are equal, and the depth of the grooves is equal to the.
It is characterized in that the device has two states of non-rotation and vertical rotation:
when the device does not rotate, the middle layer groove is positioned below the inner part of the medium structure, the surface groove is positioned above the inner part of the medium structure, electromagnetic waves are incident from the surface layer direction, under the action of a gravitational field, the middle layer groove is filled with mercury, the property of the mercury is equal to that of the metal back plate, and the device is in a wave absorber state;
when the device vertically rotates, the middle layer groove is located above the inside of the medium structure, the surface groove is located below the inside of the medium structure, electromagnetic waves are incident from the surface layer direction, the surface layer groove is filled with mercury under the action of a gravitational field, the mercury enables the resistors to be in short circuit, a complete metal structure is formed, and the device is in a frequency selection state.
The regulation and control mode is realized by rotation, and the position of mercury in the medium structure is changed due to the rotation, so that the dynamic regulation and control of the device types are realized.
As a further technical scheme of the invention, the surface metal resonance structure is formed by cutting off a plurality of structures from two square metal structures with the side length of 8 and 3.7mm, wherein the structures are respectively four cuboids with the length of 1.2mm and the width of 0.75mm, four cuboids with the length of 1.5mm and the width of 1mm, four cuboids with the length of 1mm and the width of 0.35mm and a cylinder with the radius of 3.3mm, the height of each cuboid is 0.0089mm, and the resistance bridged between every two adjacent cuboids is 160 omega; the middle-layer metal resonance structure consists of three square rings and a cuboid, the outer diameters of the three square rings are respectively 5mm, 3.5 mm and 2.6mm, the inner diameters of the three square rings are respectively 3.9 mm, 2.9 mm and 2mm, the length and the width of the cuboid are both 1mm, and the height of the cuboid is both 0.01 mm; the bottom metal resonance structure comprises a square ring and a ring, the external diameter of the square ring is 2.8mm, the internal diameter is 2.4mm, the external diameter of the ring is 4.4mm, the internal diameter is 3.4mm, and the height of the ring is 0.01 mm.
As a further technical scheme of the invention, the material of the medium structure is FR-4.
As a further technical scheme of the invention, the material of the metal reflecting plate is copper.
As a further technical scheme of the invention, the surface cover plate is made of glass.
Compared with the prior art, the invention adopting the technical scheme has the following technical effects:
(1) the gravity field controlled wave absorber and the frequency selection function reconfigurable device use a novel gravity field control mode by rotating the device, thereby achieving the purpose of controllable device types.
(2) The method for realizing the regulation and control of the device types is simple, the change of the device types can be realized only by rotating, and the defects of complex regulation and control, complex control mode and the like are overcome.
(3) The ultra-wideband absorption device is ingenious in design, achieves the ultra-wideband absorption effect, and has the advantages of being easy to obtain processing materials, novel in design, popular in structure, strong in practicability, excellent in application prospect and the like.
Drawings
Fig. 1 is a front view of the structural unit of the present invention when not rotated.
Fig. 2 is a front view of the structural unit when the present invention is vertically rotated.
Fig. 3 is a side (perspective) view of a structural unit of the present invention.
FIG. 4 is a front view of an intermediate layer of a building block when vertically rotated in accordance with the present invention.
Fig. 5 is a front view of an underlying structural unit of the present invention.
Fig. 6 is a perspective view of the present invention.
Fig. 7 is a front view of a periodic building block arrangement (2 x 2) of the present invention.
FIG. 8 is a graph showing the absorption curve of the electromagnetic wave when the electromagnetic wave is vertically incident without rotation according to the present invention.
FIG. 9 is a graph showing the reflection and transmission curves of the electromagnetic wave when the electromagnetic wave is vertically incident upon the vertical rotation according to the present invention.
Description of the drawings: 1-a pipeline for water and silver to flow through, 2-an intermediate layer metal resonance structure, 3-a surface layer metal resonance structure and a resistor, 4-a medium structure, 5-a surface layer groove formed between a glass cover plate and the metal resonance structure, 6-a bottom surface metal resonance structure, 7-a pipeline, 8-a gap and 9-an intermediate layer groove.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the attached drawings:
the invention provides a gravity field regulated wave absorber and a frequency selection function reconfigurable device, which comprise a bottom layer metal reflecting plate and a medium structure above the metal plate, wherein the surface, the inside and the bottom layer of the medium structure are provided with three layers of metal resonance structures, and a communication part is arranged between the surface and the inside and can be used for supplying water and silver to flow, as shown in figures 1 to 6. The surface metal resonance structure is connected by a resistor, and a layer of glass medium is arranged on the surface of the medium structure. The inside mercury that has held of pipeline, through rotatory this device, the position and the shape of mercury can change, mend metal structure respectively in two kinds of states and act as metal backplate and metal resonance structure, realized the regulation and control of device kind.
The device of the invention has two states of non-rotation and vertical rotation during operation:
when the device does not rotate, the middle layer groove is positioned below the inner part of the medium structure, the surface groove is positioned above the inner part of the medium structure, electromagnetic waves are incident from the surface layer direction, under the action of a gravitational field, the middle layer groove is filled with mercury, the property of the mercury is equal to that of the metal back plate, and the device is in a wave absorber state; when the device vertically rotates, the middle layer groove is located above the inside of the medium structure, the surface groove is located below the inside of the medium structure, electromagnetic waves are incident from the surface layer direction, the surface layer groove is filled with mercury under the action of a gravitational field, the mercury enables the resistors to be in short circuit, a complete metal structure is formed, and at the moment, the device is in a frequency selection state.
In the invention, the device is changed by changing the position of mercury in a way of arranging a pipeline and increasing a groove in a medium structure, and the device is rotated, so that the dynamic regulation and control of the device type are realized, and the device is formed by arranging periodic structural units, as shown in figure 7.
The technical solution of the present invention is further illustrated by the following specific examples:
the gravity field regulated wave absorber and the frequency selection function reconfigurable device have the following two working states: when the medium structure is in a non-rotating state, the schematic diagram of the surface structure is shown in fig. 1, the middle layer groove is positioned below the inner part of the medium structure, the surface groove is positioned above the inner part of the medium structure, and electromagnetic waves are incident from the surface layer direction; when in the vertical rotation state, the schematic diagram of the surface structure is shown in fig. 2, the middle layer groove is located above the inside of the dielectric structure, the surface groove is located below the inside of the dielectric structure, the electromagnetic wave is incident from the surface layer direction, and the relevant parameters in all the diagrams are shown in table 1.
According to the gravity field controlled wave absorber and the frequency selection function reconfigurable device, due to the fact that certain technical difficulty exists in actual manufacturing, a 3D printing mode is adopted in actual manufacturing, and in actual application, mercury may have the problem that mercury cannot be completely placed and laid flat, and a method of flushing hydrochloric acid steam can be used.
The wave absorber regulated by the gravity field and the frequency selection function reconfigurable device have the advantages that the medium structure and the metal structure are changed, and the types of the devices, such as a polarization converter and the like, can be expanded and changed.
TABLE 1 parameters associated with the wave absorber
As shown in fig. 8 and 9, the curves of the two operating states of the device are the absorption curves obtained in TM and TE modes, and the electromagnetic waves are incident in the surface layer direction during operation, because the device is polarization insensitive to the incident electromagnetic waves. In the absorption formula a (ω) ═ 1-R (ω) -T (ω), R (ω) represents reflectance, T (ω) represents transmittance, and T (ω) is 0 since the bottom layer is a complete metal reflective plate in the absorber state, a (ω) ═ 1-R (ω). FIG. 8 is a graph of the device when not rotated, when the device is not rotated, the reflectivity in the frequency band of 9.58 to 17.48GHz is lower than-10 dB, the absorptivity is higher than 90%, and the absorption peak at the absorption frequency point of 12.15GHz is 98.57%, so that ultra-wideband absorption is realized; FIG. 9 is a graph showing the vertical rotation of the device, wherein the device has a reflectivity higher than-1 dB and a transmittance lower than-10 dB in the frequency bands of 0 to 2.61GHz and 6.5 to 11.2GHz, i.e., the electromagnetic waves in the frequency bands are prevented from passing, and a reflectivity lower than-10 dB and a transmittance higher than-1 dB in the frequency bands of 3.8 to 5.6GHz, i.e., the electromagnetic waves in the frequency bands can pass, when the device is vertically rotated. Therefore, the purpose of regulating the device types can be achieved by rotating the device.
After specific design (shape design), the device type of the invention can be regulated and controlled. The main absorption and frequency selection are caused by a medium structure, a metal resonance structure and mercury together, and the regulation and control of device types are realized by a relatively ingenious means.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to further illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, which is intended to be protected by the appended claims. The scope of the invention is defined by the claims and their equivalents.
Claims (8)
1. The wave absorber and the frequency selection function reconfigurable device controlled by the gravity field are characterized in that: the metal reflecting plate comprises a metal reflecting plate arranged on the bottom layer and a medium structure above the metal reflecting plate, wherein three layers of metal resonance structures are sequentially distributed on the medium structure from the outside to the inside, a pipeline for supplying water silver to flow is arranged between the surface metal resonance structure and the internal metal resonance structure, all resonance units of the surface metal resonance structure are connected through a resistor, and a layer of glass medium is coated outside the resonance units; the wave absorber regulated and controlled by the gravity field and the frequency selection function reconfigurable device are rotated to be switched between the ultra-wideband wave absorber and frequency selection under the action of the gravity field.
2. The wave absorbing device and frequency-selective function reconfigurable device for gravitational field regulation and control according to claim 1, characterized in that: the device is provided with a pipeline for mercury to flow between the surface metal resonance structure and the middle layer metal resonance structure in the center of a medium structure between the two layers.
3. The wave absorbing device capable of regulating and controlling gravity field and the reconfigurable device with frequency selection function according to claim 2 are characterized in that micro resistors are connected between the surface metal structures, a groove for storing part of common mercury flows out after the micro resistors are attached to the glass cover plate, a groove for storing mercury is reserved between the metal structures in the middle layer, the volumes of the mercury which can be stored in the two grooves are equal, and the depth of the groove is equal to the height of the two layers of metal resonance structures.
4. The wave absorbing device regulated by the gravity field and the reconfigurable device with the frequency selection function according to claim 2 are characterized in that: the device has two states of non-rotation and vertical rotation:
when the device does not rotate, the middle layer groove is positioned below the inner part of the medium structure, the surface groove is positioned above the inner part of the medium structure, electromagnetic waves are incident from the surface layer direction, under the action of a gravitational field, the middle layer groove is filled with mercury, the property of the mercury is equal to that of the metal back plate, and the device is in a wave absorber state;
when the device vertically rotates, the middle layer groove is located above the inside of the medium structure, the surface groove is located below the inside of the medium structure, electromagnetic waves are incident from the surface layer direction, the surface layer groove is filled with mercury under the action of a gravitational field, the mercury enables the resistors to be in short circuit, a complete metal structure is formed, and the device is in a frequency selection state.
5. The wave absorbing device regulated by the gravity field and the reconfigurable device with the frequency selection function according to claim 2 are characterized in that: the surface metal resonance structure is formed by cutting off a plurality of structures from two square metal structures with the side length of 8mm and 3.7mm, namely four cuboids with the length of 1.2mm and the width of 0.75mm, four cuboids with the length of 1.5mm and the width of 1mm, four cuboids with the length of 1mm and the width of 0.35mm and a cylinder with the radius of 3.3mm, the height of each cuboid is 0.0089mm, and the resistance of a bridge joint between every two adjacent cuboids is 160 omega; the middle-layer metal resonance structure consists of three square rings and a cuboid, the outer diameters of the three square rings are respectively 5mm, 3.5 mm and 2.6mm, the inner diameters of the three square rings are respectively 3.9 mm, 2.9 mm and 2mm, the length and the width of the cuboid are both 1mm, and the height of the cuboid is both 0.01 mm; the bottom metal resonance structure comprises a square ring and a ring, the external diameter of the square ring is 2.8mm, the internal diameter is 2.4mm, the external diameter of the ring is 4.4mm, the internal diameter is 3.4mm, and the height of the ring is 0.01 mm.
6. The wave absorbing device and frequency-selective function reconfigurable device for gravitational field regulation and control of claim 1, wherein the material of the medium structure is FR-4.
7. The wave absorbing device and frequency-selective function reconfigurable device for gravitational field regulation and control of claim 1, wherein the metal resonant structure is made of copper.
8. The wave absorbing device and frequency-selective function reconfigurable device for gravitational field regulation and control of claim 1, wherein the material of the surface cover plate is glass.
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| CN111900546A (en) * | 2020-08-18 | 2020-11-06 | 西安电子科技大学 | Hybrid-mechanism electromagnetic super-surface for wide-band wide-angle RCS reduction |
| CN112290222A (en) * | 2020-09-27 | 2021-01-29 | 南京大学 | Programmable anisotropic coded super surface |
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