CN105140654A - Adjustable-frequency broadband meta-material wave-absorbing structure - Google Patents
Adjustable-frequency broadband meta-material wave-absorbing structure Download PDFInfo
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- CN105140654A CN105140654A CN201510546581.3A CN201510546581A CN105140654A CN 105140654 A CN105140654 A CN 105140654A CN 201510546581 A CN201510546581 A CN 201510546581A CN 105140654 A CN105140654 A CN 105140654A
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Abstract
The invention discloses an adjustable-frequency broadband meta-material wave-absorbing structure, and mainly solves a problem that the adjustable frequency of a broad wave-absorbing frequency band is difficult to achieve in the prior art. The structure mainly comprises a resonance structure (1), a dielectric substrate (2), and a metal floor (3). The resonance structure (1) and the metal floor (3) are respectively located at the upper and lower surfaces of the dielectric substrate (2). The resonance structure (1) consists of a metal square ring (4), a rectangular metal piece (5), a resistor (6), and an inductor (7). The opening of the metal square ring (4) is distributed in a manner of 90-degree rotary symmetry. The rectangular metal piece (5) is symmetrically distributed at the outer side of the metal square ring (4), and is parallel to the corresponding edge of the metal square ring (4). The resistor (6) is located at the opening of the metal square ring (4). The inductor (7) is connected with the corresponding edges of the rectangular metal piece (5) and metal square ring (4). Through the change of resistance and inductance, the structure achieves the continuous and adjustable frequency of a broad wave-absorbing band.
Description
Technical field
The invention belongs to absorbing material technical field, particularly a kind of frequency-adjustable broadband Meta Materials absorbent structure, the present invention can be widely applied in stealth technology, radar and Modern Communication System.
Background technology
In recent years, along with people improve gradually to the attention rate of Meta Materials absorbent structure, the research and design of Meta Materials absorbent structure gets more and more, the performance requirement of people to Meta Materials absorbent structure is also more and more higher, and the common wide frequency band angle insensitive Meta Materials absorbent structure that polarizes cannot meet the demand of Modern Communication System to the Meta Materials absorbent structure of frequency-tunable.At present, although the broadband metamaterial absorbent structure of frequency-adjustable has obtained certain progress, but also need further research and improve, as document " Adjustablelowfrequencyandbroadbandmetamaterialabsorberba sedonmagneticrubberplateandcrossresonator, Y.Z.Cheng, Y.Nie, Y.Wang, andR.Z.Gong, J.Appl.Phys., vol.115, no.6, 064902, 2014 " method realizing the adjustable Meta Materials absorbent structure in broadband based on rubber magnetic sheet at low frequency place proposed in, although the electrical length of the thickness resonator by change medium substrate, achieve the adjustment to inhaling ripple frequency band, but it is wide narrower to inhale wavestrip, manufacturing cost is higher, and control method is unfavorable for practical engineering application.The adjustable Meta Materials absorbent structure of double frequency-band and for example proposed in document " ANewTunableDual-bandMetamaterialAbsorberwithWide-angleTE andTMPolarizationStability, H.Q.Zhai, C.H.Zhan; L.Liu; andC.H.Liang, JournalofElectromagneticWavesandApplications, vol.29; no.6; pp.774-785,2015 ", although adjustability is good, but inhale ripple smaller bandwidth, the demand that ripple is inhaled in broadband cannot be met.And for example number of patent application is 201410582139.1, patent name is the Chinese patent of " the broadband absorbing material loading lamped element ", although propose the method being realized wide-band and wave-absorbing structure by loading resistor or capacity cell, the method cannot realize the frequency adjustment to wide suction ripple frequency band.
Summary of the invention
The object of the invention is to the deficiency existed for above-mentioned prior art, propose a kind of broadband Meta Materials absorbent structure of frequency-adjustable, to realize the adjustment of the suction ripple frequency band to absorbent structure in broadband.
The key problem in technology realizing the object of the invention is: design a kind of frequency-adjustable broadband Meta Materials absorbent structure.It is characterized in that comprising: resonance structure, medium substrate and metal floor:
Described resonance structure and metal base plate lay respectively at upper surface and the lower surface of medium substrate;
Described resonance structure is 90 degree of rotational symmetry structures, is made up of metal Fang Huan, rectangular metal sheet, resistance and inductance;
Described metal Fang Huan has several openings, and resistance is positioned at the opening part of metal Fang Huan, and these two parts are interconnected.
Described rectangular metal sheet is symmetrically distributed in the outside on the limit of metal Fang Huan, and parallel with the corresponding sides of metal Fang Huan, and rectangular metal sheet is interconnected by the corresponding sides of inductance and metal Fang Huan.
As preferably, the opening of described metal Fang Huan is 90 degree of Rotational Symmetries distributions, and number of openings on each limit is identical.
As preferably, the resistance of described resistance is all equal, and the number on every bar limit of metal Fang Huan is identical.
As preferably, the inductance value of described inductance is all equal, and its two ends connect the middle part on the middle part of rectangular metal sheet and the limit of metal Fang Huan respectively.
As preferably, opening number m >=4 of described metal Fang Huan, number n >=4 of rectangular metal sheet, number p >=4 of resistance, number q >=4 of inductance, wherein m, n, p, q are the multiple of 4, and meet m=p, n=q.
Compared with prior art, tool of the present invention has the following advantages:
1, the present invention is owing to introducing rectangular metal sheet, defines new mode of resonance and current path, optimizes broadband character of the present invention and tunable characteristic; In addition the present invention is owing to being loaded with resistance and inductance at key position, suction ripple bandwidth sum can be widened significantly and effectively change resonance electrical length, and by changing the size of resistance value and inductance value, can under the condition keeping wide suction wavestrip wide, effectively realize the adjustment of broadband being inhaled to ripple frequency band, and regulative mode is flexible.
2, the present invention is owing to adopting 90 degree of rotational symmetric resonance structures, makes the present invention have the insensitive characteristic of good polarization.
Accompanying drawing explanation
Fig. 1 is the structure front view of the embodiment of the present invention;
Fig. 2 is the structure side view of the embodiment of the present invention;
Fig. 3 is the suction ripple rate of the embodiment of the present invention under different polarizing angle;
Fig. 4 is the suction ripple rate of the embodiment of the present invention when different resistance values and inductance value.
Specific implementation method
Below in conjunction with embodiment accompanying drawing, the present invention is described further:
Embodiment 1
The broadband Meta Materials absorbent structure of frequency-adjustable, comprising: resonance structure 1, dielectric-slab 2 and metal floor 3:
Described resonance structure 1 and metal base plate 3 lay respectively at upper surface and the lower surface of dielectric-slab 2;
Described resonance structure 1 is 90 degree of rotational symmetry structures, is made up of metal side's ring 4, rectangular metal sheet 5, resistance 6 and inductance 7;
Described metal side ring 4 has several openings, and resistance 6 is positioned at the opening part of metal side's ring 4, and these two parts are interconnected.
Described rectangular metal sheet 5 is symmetrically distributed in the outside on the limit of metal side's ring 4, and parallel with the corresponding sides of metal side's ring 4, and rectangular metal sheet 5 is interconnected by the corresponding sides of inductance 7 with metal side's ring 4.
Embodiment 2
See Fig. 1 and Fig. 2, frequency-adjustable broadband of the present invention Meta Materials absorbent structure, comprising: resonance structure 1, medium substrate 2 and metal floor 3.Wherein:
Described resonance structure 1, is made up of metal side's ring 4, rectangular metal sheet 5, resistance 6 and inductance 7; Described metal side ring 4 material therefor is copper, and its outer length of side is 8mm, and width is 0.4mm, thickness is 0.017mm, the opening number m=4 of metal side's ring 4, these openings are with 90 degree of rotational symmetric formal distributions on four limits of metal side's ring 4, and the number of openings on each limit is 1; Described rectangular metal sheet 5 is symmetrically distributed in the outside of metal side's ring 4, and it is parallel with the corresponding sides of metal side's ring 4, the number n=4 of this rectangular metal sheet 5, the numbering of these 4 rectangular metal sheet is followed successively by 5-1,5-2,5-3,5-4, this rectangular metal sheet 5 material therefor is copper, long and be widely respectively 3mm and 0.4mm, but be not limited to this parameter.
Described medium substrate 2 adopts the FR4 material of double-sided copper-clad, and its dielectric constant is 4.4, and tangent loss angle is 0.02, and the length of the present embodiment medium substrate 2 is 12mm, and width is 12mm, and thickness is 3mm, but is not limited to this parameter.
Described metal floor 3 metal used is copper, and its length is 12mm, and width is 12mm, and thickness is 0.017mm, but is not limited to this parameter.
Described resonance structure 1 and metal base plate 3 lay respectively at upper surface and the lower surface of medium substrate 2.
The number p=4 of described resistance 6, the numbering of these 4 resistance is followed successively by 6-1,6-2,6-3 and 6-4, and the resistance of each resistance 6 is identical, and it is all positioned at the opening part of metal side's ring 4, and these two parts are interconnected; The number q=4 of described inductance 7, the numbering of these 4 inductance 7 is followed successively by 7-1,7-2,7-3,7-4, and the inductance value of each inductance 7 is identical, and its two ends connect the middle part of rectangular metal sheet 5 and the middle part of metal side's ring 4 corresponding sides respectively; The resistance of resistance 6 is 100ohm, 150ohm and 200ohm, and the inductance value of inductance 7 is 0.2nh and 0.4nh, but is not limited to this parameter.
Effect of the present invention further illustrates by following simulation result figure:
Study the polarization characteristic of frequency-adjustable broadband of the present invention Meta Materials absorbent structure: when the polarizing angle of incident wave is increased to 30 degree, 60 degree and 90 degree from 0 degree, emulate the present embodiment, the suction ripple rate result obtained as shown in Figure 3.As can be seen from Figure 3, when the polarizing angle change of incident wave, the suction ripple rate of broadband of the present invention is adjustable Meta Materials absorbent structure and to inhale wavestrip wide substantially constant, illustrates that broadband of the present invention adjustable Meta Materials absorbent structure has the insensitive characteristic of good polarization.
The adjustable wide frequency band characteristic of frequency-adjustable broadband of the present invention Meta Materials absorbent structure is studied: when the value choosing resistance 6 and inductance 7 is respectively 100ohm and 0.4nh, 150ohm and 0.4nh, this three class value of 200ohm and 0.2nh, emulate the present embodiment, the suction ripple rate result obtained as shown in Figure 4.As can be seen from Figure 4, when choosing suitable resistance value and inductance value, broadband of the present invention is adjustable Meta Materials absorbent structure when keeping inhaling bandwidth that ripple rate is greater than 90% and being about 3.5GHz, can realize the continuously adjustabe of wide suction ripple frequency band effectively.
Above-described embodiment result shows, broadband of the present invention is adjustable, and Meta Materials absorbent structure has the insensitive characteristic of good polarization, can realize the continuously adjustabe of wide suction ripple frequency band well simultaneously.
More than describing is only example of the present invention; obviously for those skilled in the art; after having understood content of the present invention and principle; all may when not deviating from the principle of the invention, structure; carry out the various correction in form and details and change, but these corrections based on inventive concept and change are still within claims of the present invention.
Claims (5)
1. frequency-adjustable broadband Meta Materials absorbent structure, comprising: resonance structure (1), dielectric-slab (2) and metal floor (3):
Described resonance structure (1) and metal base plate (3) lay respectively at upper surface and the lower surface of dielectric-slab (2);
Described resonance structure (1) is 90 degree of rotational symmetry structures, is made up of metal Fang Huan (4), rectangular metal sheet (5), resistance (6) and inductance (7);
Described metal Fang Huan (4) has several openings, and resistance (6) is positioned at the opening part of metal Fang Huan (4), and these two parts are interconnected.
Described rectangular metal sheet (5) is symmetrically distributed in the outside on the limit of metal Fang Huan (4), and parallel with the corresponding sides of metal Fang Huan (4), rectangular metal sheet (5) is interconnected by the corresponding sides of inductance (7) with metal Fang Huan (4).
2. frequency-adjustable broadband according to claim 1 Meta Materials absorbent structure, is characterized in that: the opening of described metal Fang Huan (4) is 90 degree of Rotational Symmetries, and number of openings on each limit is identical.
3. frequency-adjustable broadband according to claim 1 Meta Materials absorbent structure, is characterized in that: the resistance of described resistance (6) is all equal, and number on every bar limit of metal Fang Huan (4) is identical.
4. frequency-adjustable broadband according to claim 1 Meta Materials absorbent structure, it is characterized in that: the inductance value of described inductance (7) is all equal, and its two ends connect the middle part of rectangular metal sheet (5) and the middle part of metal Fang Huan (4) corresponding sides respectively.
5. frequency-adjustable broadband according to claim 1 Meta Materials absorbent structure, it is characterized in that: opening number m >=4 of described metal Fang Huan (4), number n >=4 of rectangular metal sheet (5), number p >=4 of resistance (6), number q >=4 of inductance (7), wherein m, n, p, q are the multiple of 4, and meet m=p, n=q.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111817025A (en) * | 2020-09-03 | 2020-10-23 | 浙江科技学院 | Adjustable graphene terahertz frequency selector |
| CN111883934A (en) * | 2020-08-10 | 2020-11-03 | 西安电子科技大学 | Low RCS antenna based on ultra wide band miniaturized wave absorber |
| CN112259970A (en) * | 2020-09-28 | 2021-01-22 | 东莞同济大学研究院 | Broadband wave-transmitting absorption-transmission integrated electromagnetic superstructure |
| CN114221118A (en) * | 2021-12-08 | 2022-03-22 | 哈尔滨工程大学 | Broadband metamaterial structure |
| CN116864994A (en) * | 2023-08-04 | 2023-10-10 | 中南大学 | Double-impedance-layer high-performance wave-absorbing structure |
| CN117878620A (en) * | 2024-02-05 | 2024-04-12 | 中南大学 | Broadband circuit simulation absorber based on multi-ring nested super surface |
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| CN102026531A (en) * | 2010-12-22 | 2011-04-20 | 浙江大学 | Super-matching wave-absorbing material formed by utilizing sheeted cross-shaped metal unit structure |
| CN102800943A (en) * | 2011-05-31 | 2012-11-28 | 深圳光启高等理工研究院 | Dual-polarized antenna and MIMO (multiple input multiple output) antenna with same |
| CN204156097U (en) * | 2014-10-27 | 2015-02-11 | 武汉市工程科学技术研究院 | Load the broadband absorbing material of lamped element |
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| US20030142036A1 (en) * | 2001-02-08 | 2003-07-31 | Wilhelm Michael John | Multiband or broadband frequency selective surface |
| CN102026531A (en) * | 2010-12-22 | 2011-04-20 | 浙江大学 | Super-matching wave-absorbing material formed by utilizing sheeted cross-shaped metal unit structure |
| CN102800943A (en) * | 2011-05-31 | 2012-11-28 | 深圳光启高等理工研究院 | Dual-polarized antenna and MIMO (multiple input multiple output) antenna with same |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111883934A (en) * | 2020-08-10 | 2020-11-03 | 西安电子科技大学 | Low RCS antenna based on ultra wide band miniaturized wave absorber |
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| CN111817025A (en) * | 2020-09-03 | 2020-10-23 | 浙江科技学院 | Adjustable graphene terahertz frequency selector |
| CN111817025B (en) * | 2020-09-03 | 2022-04-29 | 浙江科技学院 | Adjustable graphene terahertz frequency selector |
| CN112259970A (en) * | 2020-09-28 | 2021-01-22 | 东莞同济大学研究院 | Broadband wave-transmitting absorption-transmission integrated electromagnetic superstructure |
| CN114221118A (en) * | 2021-12-08 | 2022-03-22 | 哈尔滨工程大学 | Broadband metamaterial structure |
| CN114221118B (en) * | 2021-12-08 | 2024-03-26 | 哈尔滨工程大学 | Broadband metamaterial structure |
| CN116864994A (en) * | 2023-08-04 | 2023-10-10 | 中南大学 | Double-impedance-layer high-performance wave-absorbing structure |
| CN116864994B (en) * | 2023-08-04 | 2024-01-16 | 中南大学 | Double-impedance-layer high-performance wave-absorbing structure |
| CN117878620A (en) * | 2024-02-05 | 2024-04-12 | 中南大学 | Broadband circuit simulation absorber based on multi-ring nested super surface |
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