CN115882235A - Wave absorbing unit based on high-resistance resonant ring and broadband metamaterial wave absorber - Google Patents
Wave absorbing unit based on high-resistance resonant ring and broadband metamaterial wave absorber Download PDFInfo
- Publication number
- CN115882235A CN115882235A CN202310218623.5A CN202310218623A CN115882235A CN 115882235 A CN115882235 A CN 115882235A CN 202310218623 A CN202310218623 A CN 202310218623A CN 115882235 A CN115882235 A CN 115882235A
- Authority
- CN
- China
- Prior art keywords
- wave
- resonant ring
- absorbing unit
- ring
- wave absorbing
- 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.)
- Granted
Links
Images
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
The invention discloses a wave absorbing unit based on a high-resistance resonant ring and a broadband metamaterial wave absorber, which are formed by periodically arranging a plurality of wave absorbing units, wherein each wave absorbing unit comprises a medium matrix with a certain height; the resonant rings are sleeved outside the medium base body and are arranged at equal intervals along the height of the medium base plate; and the metal reflecting layer is attached to the bottom of the dielectric substrate. The microwave broadband absorption device realizes microwave broadband absorption, has good absorption effect on both TE polarized waves and TM polarized waves, and has stable absorption rate in a larger incident angle range; the invention is easy to expand to microwave low frequency band, wide working frequency band, good absorption effect, simple structure, thin thickness, simple technology and low cost in preparation, and can be widely applied to the fields of electromagnetic protection and compatibility, radar stealth and the like.
Description
Technical Field
The invention belongs to the technical field of electromagnetic metamaterials and microwave absorbers, and particularly relates to a wave absorbing unit based on a high-resistance resonant ring and a broadband metamaterial wave absorber.
Background
In recent years, researches on electromagnetic metamaterials such as left-handed materials, materials with near-zero refractive index, left-handed transmission lines, active left-handed transmission lines, super surfaces and the like reveal a plurality of novel and unique electromagnetic properties, show wide application prospects and attract wide attention.
On the other hand, with the rapid development of high and new technologies, the wave-absorbing material and the wave-absorbing device have urgent application requirements in the dual-purpose field of military and civilian, and the wave-absorbing device based on the traditional material cannot well meet the increasing requirements on performance and size. In 1028, landy et al propose to realize perfect absorption of microwaves by using a metamaterial for the first time, provide a new possible way for developing a high-performance wave absorber, and become a research hotspot. Because the application range of narrow-band absorption is limited, the metamaterial wave absorber gradually expands from single-frequency absorption to multi-frequency absorption and broadband absorption, and the current common methods comprise: a plurality of metal structures with different resonant frequencies, a multi-layer composite structure, a loaded lumped resistor, a resistive film and the like are introduced, but the methods have the defects of unsatisfactory low-frequency-band wave absorbing effect, complex structure, high manufacturing cost and the like.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made keeping in mind the above problems and/or problems occurring in the prior art.
One of the purposes of the invention is to provide a broadband metamaterial wave absorber based on a high-resistance resonant ring, which is easy to realize better absorption effect in a microwave low-frequency band, has a wide working frequency band, a simple structure and a thin thickness, and has the advantages of simple technology and low cost in preparation.
In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a inhale ripples unit based on high resistance resonant ring which characterized in that: the wave absorbing unit comprises a wave absorbing material and a wave absorbing material,
a dielectric substrate having a height;
the resonant rings are sleeved outside the medium base body and are arranged at equal intervals along the height of the medium base body; and (c) a second step of,
and the metal reflecting layer is attached to the bottom of the medium substrate.
As a preferable scheme of the wave absorbing unit based on the high-resistance resonant ring, the wave absorbing unit comprises the following components: the dielectric matrix is in a cubic structure, and the side length is 2.8 to 3.0mm.
As a preferable scheme of the wave absorbing unit based on the high-resistance resonant ring, the wave absorbing unit comprises the following components: the dielectric substrate is prepared from FR-4, the dielectric constant is 4.3, and the loss tangent is 0.025.
As a preferable scheme of the wave absorbing unit based on the high-resistance resonant ring, the wave absorbing unit comprises the following components: the resonant ring is in a square annular structure, the side length of an inner ring is 2.8 to 3.0mm, the side length of an outer ring is 3.0 to 3.2mm, and the thickness of the resonant ring is 0.15 to 0.25mm.
As a preferable scheme of the wave absorbing unit based on the high-resistance resonant ring, the wave absorbing unit comprises the following components: the resonance ring is prepared from a low-conductivity material, and the conductivity is 0.1 to 0.5S/m.
As a preferable scheme of the wave absorbing unit based on the high-resistance resonant ring, the wave absorbing unit comprises the following components: the distance between the adjacent resonance rings is 0.05-0.15mm.
As a preferable scheme of the wave absorbing unit based on the high-resistance resonant ring, the wave absorbing unit comprises the following components: the material of the metal reflecting layer comprises one of copper, gold, silver and iron.
As a preferable scheme of the wave absorbing unit based on the high-resistance resonant ring, the wave absorbing unit comprises the following components: the thickness of the metal reflecting layer is larger than the skin depth of incident electromagnetic waves.
The invention also aims to provide a broadband metamaterial wave absorber which is formed by periodically arranging a plurality of wave absorbing units based on the high-resistance resonant ring.
As a preferable scheme of the broadband metamaterial wave absorber, the broadband metamaterial wave absorber comprises the following components: the wave absorbing units are in rectangular arrays on the same plane, and the distance between the wave absorbing units is 0.1mm.
Compared with the prior art, the invention has the following beneficial effects:
the working frequency of the broadband metamaterial wave absorber provided by the invention covers all wave bands of L, S, C and X and most Ku wave bands, and less broadband absorbers covering the L wave band at the present stage. Compared with a method of loading lumped resistors and replacing metal patterns with resistor films, the method is easy to achieve a better absorption effect in a microwave low frequency range and has a wider working frequency band.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
FIG. 1 is a schematic structural diagram of a broadband metamaterial absorber according to the present invention;
FIG. 2 is a schematic structural diagram of a wave-absorbing unit according to the present invention;
FIG. 3 is a schematic diagram of a single high resistance square resonator ring structure;
FIG. 4 is an absorptance plot of a broadband metamaterial absorber of example 1;
FIG. 5 is a graph of the absorption rates of TE and TM waves of the broadband metamaterial wave absorber in example 1 at oblique incidence of 40 degrees;
FIG. 6 is an absorptance plot of a broadband metamaterial absorber of example 2;
FIG. 7 is an absorptance plot of a broadband metamaterial absorber of example 3;
FIG. 8 is an absorptance plot of a comparative example 1 absorber;
FIG. 9 is an absorptance profile of a comparative example 2 absorber;
FIG. 10 is an absorptance profile of a comparative example 3 absorber.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, specific embodiments thereof are described in detail below with reference to examples of the specification.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
As shown in fig. 1, a first embodiment of the present invention provides a broadband metamaterial wave absorber 200 based on a high-resistance resonant ring, where the wave absorber 200 is formed by a plurality of wave absorbing units 100 in a two-dimensional rectangular array (the number of array structures does not affect wave absorption), and a distance between adjacent wave absorbing units 100 is 0.1mm.
The wave absorbing unit 100 is composed of a medium base 101, a resonant ring 102 and a metal reflecting layer 103. The dielectric substrate is of a cube structure, and the side length l is 3.0mm; the dielectric substrate is made of FR-4, the dielectric constant is 4.3, and the loss tangent is 0.025;
the resonance ring 102 is a square ring structure, the side length a of the inner ring is 3.0mm, the side length b of the outer ring is 3.2mm, and the thickness c is 0.2mm; the resonant ring structure is prepared from a high-resistivity material, and the conductivity of the material is 0.2S/m (only a composite material meeting the conductivity parameter requirement is needed).
The resonant rings 102 are embedded on the dielectric substrate 101 at equal intervals, the interval d between adjacent resonant rings 102 is 0.1mm, and in the embodiment, 9 resonant rings 102 are embedded in the dielectric substrate.
The bottom of the dielectric substrate 101 is coated with a copper metal reflective layer 103 with a thickness t of 0.036mm.
The absorption rate equation: a (A)ω)＝1-R(ω)-T(ω) And is the frequency. The wave absorber has a copper reflecting layer applied to its bottom to reflect the electromagnetic waves almost completely and has a transmittance T: (ω) Is zero, R: (ω) Can be represented as | S by S parameter 11 | 2 . The absorption rate formula becomes A: (ω)＝1-|S 11 | 2 。
The wave absorbing performance of the broadband metamaterial absorber 200 obtained in this embodiment 1 is obtained by using numerical simulation software CST and HFSS. Fig. 4 is an absorptance diagram at normal incidence, and fig. 5 is an absorptance diagram of TE polarized waves and TM polarized waves at oblique incidence of 40 °. As can be seen from FIG. 4, the wave absorber realizes an absorption rate of more than 90% at 0.89GHz to 17.01GHz, covers all bands of L, S, C and X and most of Ku bands, and has an effective absorption bandwidth of 16.12GHz. As can be seen from fig. 5, at 40 ° oblique incidence, the absorber can still maintain stable absorption rate for TE polarized wave and TM polarized wave.
Example 2
In this embodiment 2, on the basis of embodiment 1, the size of the resonant ring 102 is adjusted to have an inner ring side length a of 2.9mm, an outer ring side length b of 3.1mm, and a width c of 0.25mm. Other conditions were the same as in example 1.
The wave absorbing property is shown in figure 6. It can be seen that the wave absorber realizes the absorption rate of more than 90% in 1.52GHz to 2.72GHz and 3.98GHz to 20GHz, and realizes efficient broadband absorption in a microwave low frequency range.
Example 3
In this embodiment 3, on the basis of embodiment 1, the conductivity of the material used for the resonant ring 102 is changed to 0.3S/m (only the composite material meeting the conductivity parameter requirement is needed). Other conditions were the same as in example 1.
The wave absorbing property is shown in figure 7. It can be seen that the wave absorber realizes the absorption rate of more than 90% in 0.94GHz to 2.06GHz and 3.3GHz to 20GHz, and realizes efficient broadband absorption in a microwave low-frequency range.
Comparative example 1
In comparative example 1, the dimensions of the resonant ring 102 were adjusted such that the inner ring side length a was 3.5mm, the outer ring side length b was 3.7mm, and the width c was 0.1mm, based on example 1. Other conditions were the same as in example 1.
The wave absorbing property is shown in figure 8. It can be seen that the wave absorber realizes absorption rate of more than 90% in 2.76GHz to 7.54GHz, and the effective absorption bandwidth is only 4.78GHz, which is greatly reduced compared with the embodiment 1.
Comparative example 2
In comparative example 2, the shapes of the resonant ring 102 and the dielectric substrate 101 were changed to cylindrical shapes based on example 1. Other conditions were the same as in example 1.
The wave absorbing property is shown in figure 9. It can be seen that the wave absorbers realize absorption rate of more than 90% in 2.36GHz to 5.68GHz and 8.44GHz to 20GHz, and do not realize effective absorption in the microwave low-frequency L wave band.
Comparative example 3
In comparative example 3, on the basis of example 1, the conductivities of the materials used in the resonant ring are respectively changed to 5S/m, 10S/m and 20S/m (namely, the composite materials respectively meet the conductivity parameter requirements). Other conditions were the same as in example 1.
The wave absorbing property is shown in figure 10. It can be seen that, with the increase of the conductivity, the operating frequency moves to high frequency, the absorption efficiency becomes worse, the absorption bandwidth of the wave absorber at the microwave low frequency band is gradually reduced, and finally, effective broadband absorption is not realized.
The broadband metamaterial wave absorber based on the high-resistance resonant ring provided by the invention realizes better absorption in a low-frequency microwave band, has an effective absorption bandwidth of 16.12GHz (0.89GHz to 17.01GHz), covers all wave bands of L, S, C and X and most of Ku wave bands, has the characteristic of polarization insensitivity, and can still keep stable absorption rate when obliquely incident at 40 degrees. The working frequency of the wave absorber is expanded to the low frequency band of microwave, the working frequency band is wide, the absorption effect is good, the structure is simple, the thickness is thin, the preparation has the advantages of simple technology and low cost, and the wave absorber can be widely applied to the fields of electromagnetic protection and compatibility, radar stealth and the like.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a inhale ripples unit based on high resistance resonant ring which characterized in that: the wave absorbing unit (100) comprises a wave absorbing material,
a dielectric substrate (101) having a height;
the resonance rings (102) are sleeved outside the medium base body (101) and are arranged at equal intervals along the height of the medium base body (101); and the number of the first and second groups,
and the metal reflecting layer (103) is attached to the bottom of the dielectric substrate (101).
2. The high-resistance resonant ring-based wave-absorbing unit of claim 1, wherein: the dielectric matrix (101) is in a cube structure, and the side length is 2.8-3.0 mm.
3. The high-resistance resonant ring-based wave-absorbing unit of claim 2, wherein: the dielectric substrate (101) is prepared from FR-4, the dielectric constant is 4.3, and the loss tangent is 0.025.
4. The wave absorbing unit based on the high-resistance resonant ring as claimed in any one of claims 1 to 3, wherein: the resonance ring (102) is in a square annular structure, the side length of an inner ring is 2.8-3.0 mm, the side length of an outer ring is 3.0-3.2mm, and the thickness of the resonance ring is 0.15-0.25mm.
5. The high-resistance resonant ring-based wave-absorbing unit of claim 4, wherein: the resonance ring (102) is made of a low-conductivity material, and the conductivity is 0.1 to 0.5S/m.
6. The high-resistance resonant ring-based wave-absorbing unit of claim 5, wherein: the distance between the adjacent resonance rings (102) is 0.05 to 0.15mm.
7. The wave absorbing unit based on the high-resistance resonant ring as claimed in any one of claims 1 to 3, wherein: the material of the metal reflecting layer (103) comprises one of copper, gold, silver and iron.
8. The high resistance resonant ring-based wave absorbing element according to claim 7, wherein: the thickness of the metal reflecting layer (103) is larger than the skin depth of incident electromagnetic waves.
9. A broadband metamaterial wave absorber is characterized in that: the broadband metamaterial wave absorber (200) is formed by periodically arranging a plurality of wave absorbing units (100) based on the high-resistance resonant ring according to any one of claims 1 to 8.
10. The broadband metamaterial wave absorber of claim 9, wherein: the wave-absorbing units (100) are in rectangular arrays on the same plane, and the distance between the wave-absorbing units (100) is 0.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310218623.5A CN115882235B (en) | 2023-03-09 | 2023-03-09 | Wave absorbing unit based on high-resistance resonant ring and broadband metamaterial wave absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310218623.5A CN115882235B (en) | 2023-03-09 | 2023-03-09 | Wave absorbing unit based on high-resistance resonant ring and broadband metamaterial wave absorber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115882235A true CN115882235A (en) | 2023-03-31 |
| CN115882235B CN115882235B (en) | 2023-07-21 |
Family
ID=85762097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310218623.5A Active CN115882235B (en) | 2023-03-09 | 2023-03-09 | Wave absorbing unit based on high-resistance resonant ring and broadband metamaterial wave absorber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115882235B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013016900A1 (en) * | 2011-07-29 | 2013-02-07 | 深圳光启高等理工研究院 | Man-made microstructure and artificial electromagnetic material |
| US20190067806A1 (en) * | 2017-06-27 | 2019-02-28 | Florida State University Research Foundation, Inc. | Metamaterials, Radomes Including Metamaterials, and Methods |
| CN109830809A (en) * | 2019-02-21 | 2019-05-31 | 南京邮电大学 | A kind of multi-layer annular Terahertz Meta Materials wave absorbing device |
| CN113161755A (en) * | 2021-04-08 | 2021-07-23 | 厦门大学 | Structural function integrated wave-transmitting cover embedded with electromagnetic metamaterial and preparation method thereof |
| CN113437528A (en) * | 2021-07-07 | 2021-09-24 | 东莞理工学院 | Broadband wave-absorbing metamaterial with adjustable narrow-band reflection window |
| CN114865327A (en) * | 2022-04-22 | 2022-08-05 | 电子科技大学 | Attenuator composed of resonant ring array |
| CN217215088U (en) * | 2022-04-19 | 2022-08-16 | 桂林电子科技大学 | Temperature-adjustable terahertz absorber based on composite all-dielectric |
-
2023
- 2023-03-09 CN CN202310218623.5A patent/CN115882235B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013016900A1 (en) * | 2011-07-29 | 2013-02-07 | 深圳光启高等理工研究院 | Man-made microstructure and artificial electromagnetic material |
| US20190067806A1 (en) * | 2017-06-27 | 2019-02-28 | Florida State University Research Foundation, Inc. | Metamaterials, Radomes Including Metamaterials, and Methods |
| CN109830809A (en) * | 2019-02-21 | 2019-05-31 | 南京邮电大学 | A kind of multi-layer annular Terahertz Meta Materials wave absorbing device |
| CN113161755A (en) * | 2021-04-08 | 2021-07-23 | 厦门大学 | Structural function integrated wave-transmitting cover embedded with electromagnetic metamaterial and preparation method thereof |
| CN113437528A (en) * | 2021-07-07 | 2021-09-24 | 东莞理工学院 | Broadband wave-absorbing metamaterial with adjustable narrow-band reflection window |
| CN217215088U (en) * | 2022-04-19 | 2022-08-16 | 桂林电子科技大学 | Temperature-adjustable terahertz absorber based on composite all-dielectric |
| CN114865327A (en) * | 2022-04-22 | 2022-08-05 | 电子科技大学 | Attenuator composed of resonant ring array |
Non-Patent Citations (1)
| Title |
|---|
| 郑益田; 郑宗华; 陈庆彬: "兆赫兹频段多频磁负超材料的设计和特性研究", 电子元件与材料 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115882235B (en) | 2023-07-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110504553B (en) | Multilayer ultra-wideband wave absorber compounded by electric loss material and magnetic material | |
| CN106207480B (en) | Complete polarization single-pass band bilateral inhales wave bands complex Meta Materials and antenna house | |
| CN110504549B (en) | Graphene-based absorption-transmission integrated frequency selection surface | |
| EP2573864B1 (en) | Man-made microstructure and artificial electromagnetic material | |
| CN112928492B (en) | Tunable optical transparent broadband metamaterial wave absorber based on water layer | |
| CN103700951A (en) | Composite media double-layer FSS (Frequency Selective Surface) structure SRR (Split Ring Resonator) metal layer ultra-light and thin wave-absorbing material | |
| CN109921192A (en) | A kind of low frequency wave transparent high-frequency wideband inhales the frequency screening device of wave | |
| CN111048907A (en) | Wave-absorbing and wave-transmitting integrated frequency selection surface with ultra-wide transparent wave band | |
| CN109586039A (en) | Inhale/pass through characteristic graphite alkene and select compound metamaterial periodic structure and antenna house frequently | |
| CN111403917A (en) | Ultra-thin broadband metamaterial wave absorber unit | |
| CN108346860B (en) | Light-permeable structural broadband wave-absorbing material with water as loss medium | |
| CN206313139U (en) | The wave absorbing device of the bandwidth expanded based on high refractive index medium coating high impedance surface | |
| Tu et al. | A miniaturized frequency selective rasorber with tunable passband | |
| CN113314850B (en) | 2.5D multilayer frequency selective surface | |
| CN106329150B (en) | Wave-absorbing metamaterial | |
| CN110707435B (en) | L-frequency-band broadband wave absorber | |
| CN115882235A (en) | Wave absorbing unit based on high-resistance resonant ring and broadband metamaterial wave absorber | |
| CN111224242B (en) | Wave-absorbing and wave-transmitting integrated frequency selective surface with anisotropic wave-transmitting band | |
| CN108767482A (en) | A kind of frequency-selective surfaces structure applied to ultra-wideband antenna | |
| CN116826390A (en) | Ultra-wideband large-angle-domain metamaterial wave absorber | |
| CN116315730A (en) | Multilayer high-performance ultra-wideband wave absorbing structure | |
| CN209822859U (en) | Rectangular microstrip antenna based on metamaterial dielectric substrate | |
| Dewani et al. | Transmission bandwidth enhancement using lateral displacement in a thin flexible single layer double sided FSS | |
| CN212162089U (en) | Ultra-thin broadband metamaterial wave absorber unit | |
| Cheng et al. | Compact interdigital microstrip band pass filter |
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 |