CN104485515A - A broadband absorbing material loaded with lumped elements - Google Patents
A broadband absorbing material loaded with lumped elements Download PDFInfo
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- CN104485515A CN104485515A CN201410582139.1A CN201410582139A CN104485515A CN 104485515 A CN104485515 A CN 104485515A CN 201410582139 A CN201410582139 A CN 201410582139A CN 104485515 A CN104485515 A CN 104485515A
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Abstract
The invention relates to a broadband absorbing material loaded with lumped elements. The broadband absorbing material comprises a substrate material and an annular metal wire arranged on the substrate material. A cross-shaped metal wire is arranged in the ring of the annular metal wire. The annular metal wire can be in the shape of a circular ring, a square ring or a hexagon ring. The upper, lower, left and right four ends of the cross-shaped metal wire are respectively connected in series with a resistor/ a capacitor. The places, corresponding to the upper, lower, left and right four ends of the cross-shaped metal wire, of annular metal wire are respectively connected in series with a resistor/ a capacitor. The broadband absorbing material is of 90-degree rotational symmetry in the structure, can overcome polarization sensitivity of electromagnetic waves very well, and has higher absorptivity for the electromagnetic waves in relatively-wide broadband.
Description
Technical field
The present invention relates to absorbing material field, refer to a kind of broadband absorbing material loading lamped element particularly, for electromagnetic protection and absorption.
Background technology
Along with the development of the hyundai electronics science and technologies such as communication, radar, electromagnetic wave application is more and more general.Meanwhile, electromagnetic harm comprises electromagnetic interference, electromagnetic radiation receives much attention.There are some researches show Electromagnetic Radiation on Environment, the impact of organism increases day by day.Such as, aircraft may be subject to Electromagnetic Interference and cannot normally take off or land; Electronic instrument for diagnosing and curing diseases device is cisco unity malfunction under the interference of mobile phone, and the household electrical appliance such as mobile phone, computer also may exist the electromagnetic hazard to user.Therefore, design a kind of advanced function material and carry out the important topic that electromagnetic wave absorption emittance has become material science.
Absorbing material typically refers to a kind of class material that effectively can absorb incident electromagnetic wave and can decay, and it is by the various different losses mechanism of material, incident electromagnetic wave is changed into heat energy or other forms of energy and reaches the object of inhaling ripple.Absorbing material has structural type and application type, and the former is spliting type mainly, and foam type is plate etc., and the latter has binding agent, and absorbent is composited, and the ability of inhaling ripple is main relevant with the kind of absorbent.
At present, traditional microwave absorbing material mainly adopts ferrite, it is high that it has absorption frequency range, the features such as absorptivity is high, and matching thickness is thin, according to the rule that electromagnetic wave is propagated from low magnetic steering high magnetic conductance direction at medium, utilize high magnetic conductivity ferrite guide electromagnetic waves, by resonance, the emittance of a large amount of electromagnetic wave absorption, then by coupling, electromagnetic power conversion is become heat energy.But be difficult to realize broadband absorb, the defects such as it is low that existing absorbing material exists absorption efficiency, and absorption band is narrow, and thickness is thicker.
Summary of the invention
The object of the invention is overcome above-mentioned the deficiencies in the prior art and provide a kind of broadband absorbing material loading lamped element, relatively for the present situation that the absorbing material absorption band of prior art is narrower, absorbing material of the present invention structurally has 90 degree of Rotational Symmetry characteristics, can overcome polarization of electromagnetic wave sensitiveness well.
The technical scheme realizing the object of the invention employing is: a kind of broadband absorbing material loading lamped element, comprise base material, and the annular metal line be located on base material, be provided with cross metal wire in the ring of described annular metal line, described annular metal line is annulus, square ring or hexagonal rings; The end, four, upper and lower, left and right of described cross metal wire is in series with resistance/capacitance respectively, and described annular metal line is also in series with resistance/capacitance with the corresponding position, four ends, upper and lower, left and right of cross metal wire.
In technique scheme, described cross metal wire is that metal wire head and the tail are connected to form cross, and in the line of cross metal wire, space is also in crosswise.
The present invention structurally has 90 degree of Rotational Symmetry characteristics, can overcome polarization of electromagnetic wave sensitiveness well, and have higher absorptivity to electromagnetic wave in broad frequency band.
Accompanying drawing explanation
Fig. 1 is double frequency-band absorbing material structural representation.
Fig. 2 is the double frequency-band absorbing material structural representation of frequency-adjustable.
Fig. 3 be loading resistor of the present invention open up wide band absorbing material structural representation.
Fig. 4 be loading capacitance of the present invention open up wide band absorbing material structural representation.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
The microwave absorbing property that the present invention is first narrower according to the frequency band of existing absorbing material, utilize combined method to design and a kind ofly absorb frequency double frequency-band absorbing material closely, and then suitable position loads lamped element (resistance or electric capacity) and realizes the object widening absorption band.
As shown in figures 1-4, the present invention's absorbing material used comprises base material and is located at the annular metal line on base material, and metal wire is made up of copper, and base material is polytetrafluoroethylene (FR4).Be provided with cross metal wire in the ring of annular metal line, annular metal line is annulus, square ring or hexagonal rings, and cross metal wire is that metal wire head and the tail are connected to form cross, and in the line of cross metal wire, space is also in crosswise.
The present invention loads the structure of the broadband absorbing material of lamped element, the first step designs to utilize combined method to design the very close double frequency absorbent structure of good frequency, according to design object, devise the double frequency absorbing material (specifically seeing Fig. 1) of three kinds of different structures, in FIG, the structure of outside realizes the absorption of low frequency, and the structure of the inside realizes the absorption of high frequency points, and will ensure can not interfere with each other between two frequency bins.
In Fig. 1 (a), 1. outside annulus realizes the absorption of low frequency, the inner cross absorption 2. realizing high frequency points;
In Fig. 1 (b), 1. outside Fang Huan realizes the absorption of low frequency, the inner cross absorption 2. realizing high frequency points;
In Fig. 1 (c), 1. outside hexagonal rings realizes the absorption of low frequency, the inner cross absorption 2. realizing high frequency points;
In order to realize the controllability of absorption band, in the present invention, the structure that have employed size and the adjustment internal spider changing outer annular structure realizes, from equivalent electric circuit theory, this way is changing the inductance of outer annular structure and cross structure to change resonant frequency point, and concrete structure as shown in Figure 2.
In Fig. 2 (a), by outside annulus 1. the adjustment of radius and metal line-width realize absorbing the frequency adjustment of low frequency, realize the frequency adjustment of absorbing high-frequency point by increasing internal spider type structure length 2..
In Fig. 2 (b), by external parties ring 1. the adjustment of the length of side and metal line-width realize absorbing the frequency adjustment of low frequency, realize the frequency adjustment of absorbing high-frequency point by increasing internal spider type structure length 2..
In Fig. 2 (c), by outside hexagonal rings 1. the adjustment of the length of side and metal line-width realize absorbing the frequency adjustment of low frequency, realize the frequency adjustment of absorbing high-frequency point by increasing internal spider type structure length 2..
Complete the design of the close dual-frequency point absorbing material of said frequencies, and realize on the controlled basis of frequency, second step on above designed double frequency absorbing material, loads lamped element (resistance or electric capacity) carry out broadening absorption band, and the end, four, upper and lower, left and right of cross metal wire is in series with resistance/capacitance respectively, annular metal line is also in series with resistance/capacitance with the corresponding position, four ends, upper and lower, left and right of cross metal wire.Concrete structure as shown in Figure 3 and Figure 4.
In Fig. 3 (a), come to widen absorption band in fact by loading resistor R1 on outside annulus loading resistor R2 and internal spider type structure.
In Fig. 3 (b), come to widen absorption band in fact by loading resistor R1 on external parties ring loading resistor R2 and internal spider type structure.
In Fig. 3 (c), come to widen absorption band in fact by loading resistor R1 on outside hexagonal rings loading resistor R2 and internal spider type structure.
In Fig. 4 (a), come to widen absorption band in fact by loading capacitance C1 on outside annulus loading capacitance C2 and internal spider type structure.
In Fig. 4 (b), come to widen absorption band in fact by loading capacitance C1 on external parties ring loading capacitance C2 and internal spider type structure.
In Fig. 4 (c), come to widen absorption band in fact by loading capacitance C1 on outside hexagonal rings loading capacitance C2 and internal spider type structure.
In the process of loading resistor and electric capacity, resistance (R1 ≠ R2) and the electric capacity (C1 ≠ C2) of different size can be selected according to actual needs, also resistance and electric capacity can be carried in simultaneously (R1C1 combination in same structure, or R1C2 combines, or R2C1 combines, or R2C2), outside loop configuration and inner cross-shaped configuration can load equal-sized resistance (R1=R2) and electric capacity (C1=C2), also can load resistance (R1 ≠ R2) and the electric capacity (C1 ≠ C2) of different size.
Claims (2)
1. one kind loads the broadband absorbing material of lamped element, it is characterized in that: comprise base material, and the annular metal line be located on base material, be provided with cross metal wire in the ring of described annular metal line, described annular metal line is annulus, square ring or hexagonal rings; The end, four, upper and lower, left and right of described cross metal wire is in series with resistance/capacitance respectively, and described annular metal line is also in series with resistance/capacitance with the corresponding position, four ends, upper and lower, left and right of cross metal wire.
2. load the broadband absorbing material of lamped element according to claim 1, it is characterized in that: described cross metal wire is that metal wire head and the tail are connected to form cross, and in the line of cross metal wire, space is also in crosswise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410582139.1A CN104485515A (en) | 2014-10-27 | 2014-10-27 | A broadband absorbing material loaded with lumped elements |
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| CN201410582139.1A CN104485515A (en) | 2014-10-27 | 2014-10-27 | A broadband absorbing material loaded with lumped elements |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106058478A (en) * | 2016-05-15 | 2016-10-26 | 武汉理工大学 | High-low frequency compatible tunable broadband wave-absorbing composite meta-material |
| CN106973561A (en) * | 2016-01-14 | 2017-07-21 | 武汉碧海云天科技股份有限公司 | Magnetic field shielding Meta Materials |
| CN106972277A (en) * | 2016-01-14 | 2017-07-21 | 武汉碧海云天科技股份有限公司 | Electromagnetism Meta Materials |
| CN107834209A (en) * | 2017-12-06 | 2018-03-23 | 哈尔滨理工大学 | A kind of wide angle polarizes insensitive Terahertz three with absorber |
| CN110544832A (en) * | 2019-08-23 | 2019-12-06 | 南京理工大学 | Dynamic camouflage super-surface with double-frequency point electromagnetic characteristic capable of being actively and electrically adjusted |
| CN110797655A (en) * | 2019-11-13 | 2020-02-14 | 北京环境特性研究所 | Flexible electromagnetic structure with controllable pass band |
| CN111029788A (en) * | 2019-12-11 | 2020-04-17 | 中国电子科技集团公司第十四研究所 | Broadband metamaterial wave-absorbing structure with angle and polarization insensitivity |
| CN112072323A (en) * | 2020-09-03 | 2020-12-11 | 浙江科技学院 | Terahertz switch based on metal and vanadium dioxide |
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| WO2005084096A1 (en) * | 2004-03-01 | 2005-09-09 | Nitta Corporation | Electromagnetic wave absorber |
| 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 |
| 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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| WO2005084096A1 (en) * | 2004-03-01 | 2005-09-09 | Nitta Corporation | Electromagnetic wave absorber |
| 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 |
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| HAN YE等: ""Microwave Absorbers Made of Arrays of Square Loops with Lumped Resistors through Optimization with Genetic Algorithm Approach"", 《GENERAL ASSEMBLY AND SCIENTIFIC SYMPOSIUM 2014》 * |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106973561A (en) * | 2016-01-14 | 2017-07-21 | 武汉碧海云天科技股份有限公司 | Magnetic field shielding Meta Materials |
| CN106972277A (en) * | 2016-01-14 | 2017-07-21 | 武汉碧海云天科技股份有限公司 | Electromagnetism Meta Materials |
| CN106972277B (en) * | 2016-01-14 | 2024-03-19 | 武汉碧海云天科技股份有限公司 | Electromagnetic metamaterial |
| CN106973561B (en) * | 2016-01-14 | 2024-03-22 | 武汉碧海云天科技股份有限公司 | Magnetic field shielding metamaterial |
| CN106058478A (en) * | 2016-05-15 | 2016-10-26 | 武汉理工大学 | High-low frequency compatible tunable broadband wave-absorbing composite meta-material |
| CN107834209A (en) * | 2017-12-06 | 2018-03-23 | 哈尔滨理工大学 | A kind of wide angle polarizes insensitive Terahertz three with absorber |
| CN110544832A (en) * | 2019-08-23 | 2019-12-06 | 南京理工大学 | Dynamic camouflage super-surface with double-frequency point electromagnetic characteristic capable of being actively and electrically adjusted |
| CN110797655A (en) * | 2019-11-13 | 2020-02-14 | 北京环境特性研究所 | Flexible electromagnetic structure with controllable pass band |
| CN111029788A (en) * | 2019-12-11 | 2020-04-17 | 中国电子科技集团公司第十四研究所 | Broadband metamaterial wave-absorbing structure with angle and polarization insensitivity |
| CN112072323A (en) * | 2020-09-03 | 2020-12-11 | 浙江科技学院 | Terahertz switch based on metal and vanadium dioxide |
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Application publication date: 20150401 |