CN111403917A - Ultra-thin broadband metamaterial wave absorber unit - Google Patents
Ultra-thin broadband metamaterial wave absorber unit Download PDFInfo
- Publication number
- CN111403917A CN111403917A CN202010368638.6A CN202010368638A CN111403917A CN 111403917 A CN111403917 A CN 111403917A CN 202010368638 A CN202010368638 A CN 202010368638A CN 111403917 A CN111403917 A CN 111403917A
- Authority
- CN
- China
- Prior art keywords
- metal
- square ring
- patch
- side length
- metal square
- 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
- H01Q15/0006—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
-
- 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
- H01Q17/008—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems with a particular shape
Landscapes
- Aerials With Secondary Devices (AREA)
Abstract
The invention discloses an ultrathin broadband metamaterial wave absorber unit which comprises a surface metal structure layer, a middle medium plate layer and a bottom metal ground, wherein the surface metal structure layer, the middle medium plate layer and the bottom metal ground are sequentially arranged, the surface metal structure layer comprises a first metal square ring, a second metal square ring and a first square metal patch, openings are formed in the upper frame and the lower frame of the first metal square ring and the upper frame and the lower frame of the second metal square ring, the openings are connected through a resistance patch to form a closed ring, the first square metal patch is located in the center, and the whole surface metal structure layer is centrosymmetric. The invention realizes the absorption of electromagnetic waves in a relatively wide frequency range by adopting the metal square ring structure loaded with the resistance patch element, and meanwhile, the structure is simple and is easy to process and manufacture.
Description
Technical Field
The invention belongs to the technical field of novel artificial electromagnetic materials, and particularly relates to an ultrathin broadband metamaterial wave absorber unit in a microwave band.
Background
The metamaterial is a three-dimensional artificial composite material and has unique electromagnetic properties compared with natural materials. The metamaterial is formed by periodically or non-periodically arranging basic units with the structure size far smaller than the wavelength. Through reasonably designing and optimizing the structure of the metamaterial unit, any equivalent electromagnetic parameter can be obtained, and the regulation and control space of the electromagnetic wave is widened to a great extent. Due to their rich electromagnetic properties, metamaterials have attracted considerable attention from researchers, and may be used in a variety of applications, such as superlenses, electromagnetic black holes, and perfect absorbers. Besides being capable of working in a microwave frequency band, the metamaterial can also be applied to a terahertz wave band, an infrared wave band, an optical wave band and even an acoustic wave band.
A metamaterial wave absorber is an electromagnetic functional material capable of partially or completely converting incident electromagnetic wave energy into other energy forms. The cross section of the radar scattering can be reduced by absorbing electromagnetic waves, and military stealth and other applications can be realized. The wave absorbing capacity of the metamaterial mainly depends on the resonance characteristics of the metal structures, so that the metamaterial is usually narrowband absorption, and in order to widen the bandwidth of the metamaterial wave absorber, the problem can be solved by arranging a plurality of resonance structures or stacking a plurality of layers of metal structures. But the processing technology is difficult and is not beneficial to practical application.
The design of the absorber aims at achieving high absorption characteristics over a range of frequency bands and the thickness of its structure should be as small as possible.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an ultrathin broadband metamaterial wave absorber unit which adopts a metal square ring structure loaded with a resistance patch element and realizes efficient absorption of electromagnetic waves within a frequency band range of 15.2GHz-36.8 GHz. Compared with a method of stacking multiple layers of metal, the method has the advantages of being ultrathin, simpler in structure and easy to process and manufacture.
In order to achieve the purpose, the invention adopts the following technical scheme:
an ultra-thin broadband metamaterial wave absorber unit is characterized in that: the basic unit comprises a surface metal structure layer, a middle dielectric plate layer and a bottom metal ground which are sequentially arranged from top to bottom; the surface metal structure layer comprises a first metal square ring, a second metal square ring and a first square metal patch, wherein the first metal square ring, the second metal square ring and the first square metal patch are attached to the upper surface of the upper dielectric sheet layer, openings are formed in the upper frame and the lower frame of the first metal square ring and are connected through a first resistor patch and a fourth resistor patch to form a closed loop, openings are formed in the upper frame and the lower frame of the second metal square ring and are connected through a second resistor patch and a third resistor patch to form a closed loop, the first square metal patch is located in the center, and the whole surface metal structure layer is centrosymmetric.
Further, the period side length p of the basic unit is 6.4-6.6 mm; the side length a1 of the outer frame of the first metal square ring is 5.9-6.1mm, the side length a2 of the inner frame of the first metal square ring is 4.7-4.9mm, the side length b1 of the outer frame of the second metal square ring is 4.1-4.3mm, the side length a2 of the inner frame of the second metal square ring is 2.7-2.9mm, the widths g of the openings of the upper frame and the lower frame of the first metal square ring and the second metal square ring are both 0.4-0.6mm, and the side length c of the first square metal patch is 2.2-2.4 mm; the thickness h1 of the middle dielectric slab layer is 1.42-1.62mm, the dielectric constant is 0.8-1.2, and the loss tangent is-0.003-0.003; the thickness h2 of the bottom layer metal ground is 0.09-0.11 mm.
Preferably, the periodic side length p of the basic unit is 6.5 mm; the side length a1 of the outer frame of the first metal square ring is 6.0mm, the side length a2 of the inner frame of the first metal square ring is 4.8mm, the side length b1 of the outer frame of the second metal square ring is 4.2mm, the side length a2 of the inner frame of the second metal square ring is 2.8mm, the widths g of the openings of the upper frame and the lower frame of the first metal square ring and the second metal square ring are both 0.5mm, and the side length c of the first square metal patch is 2.3 mm; the thickness h1 of the middle dielectric slab layer is 1.52 mm; the thickness h2 of the bottom layer metal ground is 0.1 mm.
Further, the resistance values of the resistor patches are respectively set to be 300 Ω of the first resistor patch, 43 Ω of the second resistor patch, 470 Ω of the third resistor patch, and 600 Ω of the fourth resistor patch.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention adopts the metal structure of the loading resistance patch to ensure that the metamaterial realizes the broadband wave-absorbing characteristic.
2. The metamaterial wave absorber unit has certain bandwidth characteristics, and can achieve a wave absorbing function in a wide frequency band.
3. The invention has simple processing and convenient realization, and is easy to prepare and process in a microwave frequency band only by depending on simple metal patterns.
Drawings
FIG. 1 is a schematic front view of a basic unit according to the present invention;
FIG. 2 is a schematic cross-sectional view of a basic unit according to the present invention;
wherein: 1-a surface metal structure layer, 11-a first metal square ring, 12-a second metal square ring, 13-a first square metal patch, 2-a resistor patch, 21-a first resistor patch, 22-a second resistor patch, 23-a third resistor patch, 24-a fourth resistor patch, 3-an intermediate dielectric slab layer and 4-a bottom metal ground layer; p is the periodic side length of the basic unit, a1 is the side length of the outer frame of the first metal square ring, a2 is the side length of the inner frame of the first metal square ring, b1 is the side length of the outer frame of the second metal square ring, b2 is the side length of the inner frame of the second metal square ring, c is the side length of the first square metal patch, h1 is the thickness of the middle medium plate layer, and h2 is the thickness of the grounding metal at the bottom layer;
fig. 3 is a basic unit and a performance result in the present invention, fig. 3 (a) is a perspective view of the basic unit in the present invention, and fig. 3 (b) is a simulation result of the reflection amplitude of the basic unit.
Detailed Description
The present invention will be further described with reference to the following examples.
As shown in fig. 1-2, an ultra-thin broadband metamaterial wave absorber unit is characterized in that: the basic unit comprises a surface metal structure layer 1, a middle dielectric plate layer 3 and a bottom metal ground 4 which are sequentially arranged from top to bottom; the surface metal structure layer 1 comprises a first metal square ring 11, a second metal square ring 12 and a first square metal patch 13, wherein the first metal square ring 11, the second metal square ring 12 and the first square metal patch 13 are attached to the upper surface of the upper dielectric sheet layer 3, openings are formed in the upper frame and the lower frame of the first metal square ring 11 and are connected through a first resistor patch 21 and a fourth resistor patch 24 to form a closed loop, openings are formed in the upper frame and the lower frame of the second metal square ring 12 and are connected through a second resistor patch 22 and a third resistor patch 23 to form a closed loop, the first square metal patch 13 is located in the center, and the whole surface metal structure layer 1 is centrosymmetric.
The periodic side length p of the basic unit is 6.4-6.6 mm; the side length a1 of the outer frame of the first metal square ring 11 is 5.9-6.1mm, the side length a2 of the inner frame of the first metal square ring 11 is 4.7-4.9mm, the side length b1 of the outer frame of the second metal square ring 12 is 4.1-4.3mm, the side length a2 of the inner frame of the second metal square ring 12 is 2.7-2.9mm, the widths g of the openings of the upper and lower frames of the first metal square ring 11 and the second metal square ring 12 are both 0.4-0.6mm, and the side length c of the first square metal patch 13 is 2.2-2.4 mm; the thickness h1 of the middle dielectric slab layer 3 is 1.42-1.62mm, the dielectric constant is 0.8-1.2, and the loss tangent is-0.003-0.003; the thickness h2 of the bottom layer metal ground 4 is 0.09-0.11 mm.
As a preferable scheme, the periodic side length p of the basic unit is 6.5 mm; the side length a1 of the outer frame of the first metal square ring 11 is 6.0mm, the side length a2 of the inner frame of the first metal square ring 11 is 4.8mm, the side length b1 of the outer frame of the second metal square ring 12 is 4.2mm, the side length a2 of the inner frame of the second metal square ring 12 is 2.8mm, the widths g of the openings of the upper and lower frames of the first metal square ring 11 and the second metal square ring 12 are both 0.5mm, and the side length c of the first square metal patch 13 is 2.3 mm; the thickness h1 of the middle dielectric slab layer 3 is 1.52 mm; the thickness h2 of the bottom layer metal ground 4 is 0.1 mm.
As a preferable scheme, the resistance values of the resistive patches 2 are set to 300 Ω of the first resistive patch 21, 43 Ω of the second resistive patch 22, 470 Ω of the third resistive patch 23, and 600 Ω of the fourth resistive patch 24, respectively.
In the invention, the resistance patch 2 is loaded to realize the widening of the absorption frequency band and ensure the strong absorption performance of the basic unit.
As shown in FIG. 3, according to simulation results of a single basic unit, under normal incidence of x-polarized electromagnetic waves, reflection amplitudes of the unit in a frequency range of 15.2GHz-36.8GHz are all less than-10 dB, which indicates that the metamaterial wave absorber unit can realize broadband efficient absorption.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (4)
1. An ultra-thin broadband metamaterial wave absorber unit is characterized in that: the basic unit comprises a surface metal structure layer (1), a middle dielectric slab layer (3) and a bottom metal ground (4) which are sequentially arranged from top to bottom; the surface metal structure layer (1) comprises a first metal square ring (11), a second metal square ring (12) and a first square metal patch (13) which are attached to the upper surface of the upper medium plate layer (3), openings are formed in the upper frame and the lower frame of the first metal square ring, the upper frame and the lower frame of the first metal square ring are connected through a first resistor patch (21) and a fourth resistor patch (24) to form a closed loop, openings are formed in the upper frame and the lower frame of the second metal square ring, the upper frame and the lower frame of the second metal square ring are connected through a second resistor patch (22) and a third resistor patch (23) to form a closed loop, the first square metal patch (13) is located in the center, and the whole surface metal structure layer (.
2. The base unit of claim 1, wherein: the periodic side length p of the basic unit is 6.4-6.6 mm; the side length a1 of the outer frame of the first metal square ring (11) is 5.9-6.1mm, the side length a2 of the inner frame of the first metal square ring (11) is 4.7-4.9mm, the side length b1 of the outer frame of the second metal square ring (12) is 4.1-4.3mm, the side length a2 of the inner frame of the second metal square ring (12) is 2.7-2.9mm, the widths g of the openings of the upper frame and the lower frame of the first metal square ring (11) and the second metal square ring (12) are both 0.4-0.6mm, and the side length c of the first square metal patch (13) is 2.2-2.4 mm; the thickness h1 of the middle dielectric slab layer (3) is 1.42-1.62mm, the dielectric constant is 0.8-1.2, and the loss tangent is-0.003-0.003; the thickness h2 of the bottom layer metal ground (4) is 0.09-0.11 mm.
3. The base unit of claim 1, wherein: the periodic side length p of the basic unit is 6.5 mm; the side length a1 of the outer frame of the first metal square ring (11) is 6.0mm, the side length a2 of the inner frame of the first metal square ring (11) is 4.8mm, the side length b1 of the outer frame of the second metal square ring (12) is 4.2mm, the side length a2 of the inner frame of the second metal square ring (12) is 2.8mm, the widths g of the openings of the upper and lower frames of the first metal square ring (11) and the second metal square ring (12) are both 0.5mm, and the side length c of the first square metal patch (13) is 2.3 mm; the thickness h1 of the middle dielectric slab layer (3) is 1.52 mm; the thickness h2 of the bottom layer metal ground (4) is 0.1 mm.
4. The base unit of claim 1, wherein: the resistance values of the resistor patches (2) are respectively set to be 300 omega for the first resistor patch (21), 43 omega for the second resistor patch (22), 470 omega for the third resistor patch (23) and 600 omega for the fourth resistor patch (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010368638.6A CN111403917A (en) | 2020-05-01 | 2020-05-01 | Ultra-thin broadband metamaterial wave absorber unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010368638.6A CN111403917A (en) | 2020-05-01 | 2020-05-01 | Ultra-thin broadband metamaterial wave absorber unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111403917A true CN111403917A (en) | 2020-07-10 |
Family
ID=71429985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010368638.6A Pending CN111403917A (en) | 2020-05-01 | 2020-05-01 | Ultra-thin broadband metamaterial wave absorber unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111403917A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112054309A (en) * | 2020-09-02 | 2020-12-08 | 中国航空工业集团公司西安飞行自动控制研究所 | Multi-frequency-band electromagnetic wave absorption structure and method |
| CN112072220A (en) * | 2020-07-13 | 2020-12-11 | 宁波大学 | Absorptive broadband band-pass spatial filter |
| CN112332105A (en) * | 2020-11-23 | 2021-02-05 | 航天特种材料及工艺技术研究所 | Metamaterial structure with switchable Ku waveband wave-transparent/shielding states |
| CN113394569A (en) * | 2021-06-30 | 2021-09-14 | 电子科技大学长三角研究院(湖州) | Low-profile dual-band wave-absorbing surface applied to vehicle-mounted radar test environment and manufacturing method thereof |
-
2020
- 2020-05-01 CN CN202010368638.6A patent/CN111403917A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112072220A (en) * | 2020-07-13 | 2020-12-11 | 宁波大学 | Absorptive broadband band-pass spatial filter |
| CN112072220B (en) * | 2020-07-13 | 2021-10-19 | 宁波大学 | Absorptive broadband band-pass spatial filter |
| CN112054309A (en) * | 2020-09-02 | 2020-12-08 | 中国航空工业集团公司西安飞行自动控制研究所 | Multi-frequency-band electromagnetic wave absorption structure and method |
| CN112054309B (en) * | 2020-09-02 | 2023-05-23 | 中国航空工业集团公司西安飞行自动控制研究所 | Multi-band electromagnetic wave absorption structure and absorption method |
| CN112332105A (en) * | 2020-11-23 | 2021-02-05 | 航天特种材料及工艺技术研究所 | Metamaterial structure with switchable Ku waveband wave-transparent/shielding states |
| CN113394569A (en) * | 2021-06-30 | 2021-09-14 | 电子科技大学长三角研究院(湖州) | Low-profile dual-band wave-absorbing surface applied to vehicle-mounted radar test environment and manufacturing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111403917A (en) | Ultra-thin broadband metamaterial wave absorber unit | |
| CN110504549B (en) | Graphene-based absorption-transmission integrated frequency selection surface | |
| CN112952400B (en) | Broadband wave-absorbing structure with high-transmittance wave-transmitting window | |
| CN110416742B (en) | Light and thin broadband wave-absorbing metamaterial | |
| CN108493623B (en) | Sub-wavelength layered three-dimensional broadband wave-absorbing structure based on loss type frequency selective surface | |
| CN107689488B (en) | Frequency selection surface structure applied to ultra-wideband antenna | |
| KR20160013697A (en) | Thin-layer and Wide Bandwidth Electromagnetic Wave Absorber | |
| CN112821081A (en) | Absorption and transmission integrated frequency selective surface with high-frequency broadband wave absorption and low-frequency wave transmission | |
| CN108777359A (en) | Metamaterial antenna cover based on frequency trigger mechanism | |
| WO2007080368A1 (en) | Absorber | |
| CN212162089U (en) | Ultra-thin broadband metamaterial wave absorber unit | |
| CN113922095B (en) | Adjustable suction-permeation integrated conformal frequency selective surface | |
| CN111755835A (en) | Broadband periodic wave absorbing structure based on magnetic substrate | |
| CN111786122A (en) | Reconfigurable wave-absorbing and wave-transmitting integrated FSS with high transmittance | |
| CN114013149B (en) | Microwave and infrared double-stealth composite material | |
| CN113314850B (en) | 2.5D multilayer frequency selective surface | |
| CN109088171B (en) | Wave absorber with broadened bandwidth based on cavity resonance and lumped element | |
| CN111092300A (en) | Indium tin oxide-based amplitude modulation coding reflective basic unit and metamaterial | |
| CN113285233A (en) | F-P cavity antenna based on dielectric-based metamaterial and electronic equipment | |
| CN108400448B (en) | Candy type metamaterial wave absorber | |
| Sheng et al. | Design of frequency selective rasorber with high in-band transmission and wideband absorption properties | |
| CN212230618U (en) | Multi-band active metamaterial wave absorber | |
| CN114498047A (en) | Broadband low-RCS (radar cross section) super-surface structure based on scattering and absorption synergistic effect | |
| CN110380228B (en) | Wave absorbing device based on principle of reflection-free filter | |
| CN109713443B (en) | SIW antenna array loaded with butterfly-like left-handed material units |
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 |