CN107394414A - Wave absorbing device based on double-layer magnetic media implementation low-frequency range broadened bandwidth - Google Patents
Wave absorbing device based on double-layer magnetic media implementation low-frequency range broadened bandwidth Download PDFInfo
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- CN107394414A CN107394414A CN201710584624.6A CN201710584624A CN107394414A CN 107394414 A CN107394414 A CN 107394414A CN 201710584624 A CN201710584624 A CN 201710584624A CN 107394414 A CN107394414 A CN 107394414A
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- wave absorbing
- absorbing device
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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
- H01Q17/008—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems with a particular shape
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Abstract
The present invention provides a kind of wave absorbing device based on double-layer magnetic media implementation low-frequency range broadened bandwidth.The wave absorbing device includes medium substrate (1) and is close to the metallic plate (2) of medium substrate (1) lower surface, also include the period surface metal pattern (3) positioned at medium substrate (1) upper surface, the medium substrate (4) being additionally included in above the period surface metal pattern, in addition to the period surface metal pattern (5) positioned at medium substrate (4) upper surface.The wave absorbing device of the present invention has the different magnetizing mediums of cycle metal pattern using two kinds of surfaces, and both magnetizing mediums are longitudinally superimposed, and solves the problems, such as to inhale wavestrip width in L frequency ranges.
Description
Technical field
The present invention relates to a kind of wave absorbing device of double-layer magnetic media implementation low-frequency range broadened bandwidth, belong to Meta Materials wave absorbing device and set
The technical field of meter.
Background technology
Microwave wave absorbing device, it is a kind of functional material for being capable of effective electromagnetic wave absorption as its name suggests, 2008, Landy
Et al. absorbing property is prepared close to 100% wave absorbing device according to the EMR electromagnetic resonance characteristic of Meta Materials, but frequency band is very narrow, it
Wave absorbing device is quickly grown afterwards, with deepening continuously for research, various stable polarizations, wide-angle, broadband and multiband
Meta Materials wave-absorber is suggested in succession, and is applied to that physical protection, information security, target be stealthy and antenna structure design
Reduction design etc..
But most of wave absorbing device working frequency is ground to low-frequency range wave absorbing device of the working frequency in L frequency ranges in X-band at this stage
Study carefully it is less, although the wave absorbing device of high band can be all especially big by uniform zoom to low-frequency range, thickness and unit size.
In L frequency ranges and wave plate thickness is inhaled no more than on the premise of 2mm, wants to realize that the suction ripple of broad frequency band is more difficult.
The content of the invention
Technical problem：The technical problem to be solved in the present invention is to provide a kind of double-layer magnetic media implementation low-frequency range broadened bandwidth
Wave absorbing device, how to expand frequency bandwidth on the premise of L frequency ranges and thickness are no more than 2mm.Main target be realize thickness of thin,
Frequency band is low, with wide, insensitive and wide-angle the Meta Materials wave absorbing device of polarization.
Technical scheme：The wave absorbing device of the double-layer magnetic media implementation low-frequency range broadened bandwidth of the present invention, under the wave absorbing device includes
Layer medium substrate and the metallic plate for being close to medium substrate lower surface, in addition to positioned at the middle level of layer dielectric upper surface of base plate week
Phase surface metal structure, and upper layer medium substrate on the middle level period surface metal structure, positioned at top dielectric
The upper strata period surface metal structure of upper surface of base plate；
Wherein：
Described layer dielectric substrate, for material therefor in 1GHz-2GHz frequency ranges, magnetic conductivity drops to 5.88 from 7.9, is situated between
For electric constant near 24, thickness is 0.6 ± 0.05mm.
Described upper layer medium substrate, for material therefor in 1GHz-2GHz frequency ranges, magnetic conductivity drops to 4.12 from 4.76,
Dielectric constant is close to 16 but changes less, and thickness is 1.4 ± 0.05mm.
Described middle level period surface metal structure and upper strata period surface metal structure is metal side's ring structure, but chi
Very little difference.
The square ring outer ring length of side of the middle level period surface metal structure is 6.5 ± 0.1mm, and the square ring inner ring length of side is 0.6
±0.1mm。
The described upper strata period surface metal structure side ring outer ring length of side is 7.6 ± 0.1mm, and the square ring inner ring length of side is 1.5
±0.1mm。
The wave absorbing device unit size is (10 ± 0.1) mm* (10 ± 0.1) mm, and wave absorbing device thickness is 2 ± 0.1mm, metallic plate
All it is copper foil with middle level period surface metal structure and upper strata period surface metal structure, thickness is 0.02 ± 0.005mm.
The absorptivity calculation formula of the wave absorbing device is A (ω)=1-R (ω), and wherein R (ω) is wave absorbing device input reflection system
Square of several modulus value, ω are frequency.
Beneficial effect：
1st, the wave absorbing device based on double-layer magnetic media implementation low-frequency range broadened bandwidth of the invention, by two different magnetic materials
Material is applied in Meta Materials wave absorbing device, by being mutually matched between two layers of magnetizing mediums, from the angle broadening L-band of dielectric material
The bandwidth of wave absorbing device.
2nd, the wave absorbing device based on double-layer magnetic media implementation low-frequency range broadened bandwidth of the invention, in two layers of dielectric surface
Cycle metal structure is pasted, the impedance being more easy to double layer of metal structure to wave absorbing device is adjusted.
3rd, the wave absorbing device based on double-layer magnetic media implementation low-frequency range broadened bandwidth of the invention is operated in L frequency ranges, and shows rank
The design of the wave absorbing device of section L frequency ranges is less.
4th, the wave absorbing device thickness based on double-layer magnetic media implementation low-frequency range broadened bandwidth of the invention is 2mm, very thin thickness,
And unit size is 10mm*10mm, unit size is small, and the wave absorbing device is insensitive to polarizing.
Brief description of the drawings
Fig. 1 is the overall structure signal of the wave absorbing device based on double-layer magnetic media implementation low-frequency range broadened bandwidth in the present invention
Figure,
Fig. 2 is the dielectric constant curve map of layer dielectric substrate material therefor in Fig. 1,
Fig. 3 is the permeability curcve figure of layer dielectric substrate material therefor in Fig. 1,
Fig. 4 is the dielectric constant curve map of Fig. 1 medium substrate material therefors at the middle and upper levels,
Fig. 5 is the permeability curcve figure of Fig. 1 medium substrate material therefors at the middle and upper levels,
Fig. 6 is two layers of cycle metal structure pattern schematic diagram in Fig. 1,
Fig. 7 is the suction ripple rate figure of embodiment 1.
Have in figure：Layer dielectric substrate 1, metallic plate 2, middle level cycle metal structure 3, upper layer medium substrate 4, upper strata cycle
Metal structure 5.
Embodiment
A kind of wave absorbing device based on double-layer magnetic media implementation low-frequency range broadened bandwidth of the present invention, the wave absorbing device are situated between including lower floor
Matter substrate 1 and the metallic plate 2 for being close to layer dielectric base lower surface, in addition to the week positioned at the upper surface of layer dielectric substrate 1
Phase surface metal structure 3, the upper layer medium substrate 4 being additionally included in above the period surface metal structure 3, in addition to positioned at upper
The upper strata period surface metal structure 5 of layer medium substrate 4 upper surface.
Preferably, for the material therefor of layer dielectric substrate 1 in 1GHz-2GHz frequency ranges, magnetic conductivity drops to 5.88 from 7.9,
Dielectric constant is near 24.Described medium substrate 4, in 1GHz-2GHz frequency ranges, magnetic conductivity drops to material therefor from 4.76
4.12, dielectric constant is close to 16 and changes little.
Preferably, middle level cycle metal structure 3, upper strata cycle metal structure 5 are metal side's ring structure, but size is not
Together, can be by the size of two layers of cycle metal structure pattern of regulation, the impedance for adjusting whole wave absorbing device is allowed to and free space
Match somebody with somebody.
Preferably, the metallic plate 2 of bottom and middle level cycle metal structure 3, upper strata cycle metal structure 5 are all copper foil, thick
Spend for 0.02mm.
The absorptivity calculation formula of the wave absorbing device is generally：A (ω)=1-R (ω)-T (ω), here because bottom is
Metallic plate 2, then passed through without ripple, transmissivity zero, the suction ripple rate calculation formula in the present invention is A (ω)=1-R (ω).
Illustrated below according to encompassed content.
Embodiment 1：
A kind of wave absorbing device based on double-layer magnetic media implementation low-frequency range broadened bandwidth, as shown in Figure 1.On two layer medium substrate
As shown in fig. 6, wave absorbing device unit size is 10mm*10mm, the thickness of layer dielectric substrate is the cycle metal structure on surface
0.6mm, the square ring outer ring length of side of layer dielectric substrate surface is 6.5mm, and the square ring inner ring length of side is 0.6mm；Upper layer medium substrate
Thickness be 1.4mm, the square ring outer ring length of side on upper layer medium substrate surface is 7.6mm, and the square ring inner ring length of side is 1.5mm.
The wave absorbing device of double-layer magnetic media implementation low-frequency range broadened bandwidth in this example is in electromagnetic simulation software HFSS.13
Modeling and simulating show that Fig. 7 is the suction ripple rate curve map in this example, it can be seen from figure 7 that wave absorbing device is in 1.25GHz-
1.98GHz realizes more than 0.85 suction ripple rate, so the wave absorbing device realizes the band for inhaling the 730MHz of ripple rate more than 0.85 in L frequency ranges
It is wide.
In summary, the wave absorbing device of the invention based on double-layer magnetic media implementation low-frequency range broadened bandwidth can be realized in L frequency ranges
A width of 730MHz of the corresponding suction wavestrip of ripple rate more than 0.85 or so is inhaled, and dielectric substrate thickness only has 2mm, the wave absorbing device band is wide
Thickness of thin, it may be advantageously applied in engineering practice.
Claims (8)
- A kind of 1. wave absorbing device based on double-layer magnetic media implementation low-frequency range broadened bandwidth, it is characterised in that：Under the wave absorbing device includes Layer medium substrate (1) and the metallic plate (2) for being close to layer dielectric substrate (1) lower surface, in addition to it is located at layer dielectric substrate (1) the middle level period surface metal structure (3) of upper surface, and in the middle level period surface metal structure (3) above upper Layer medium substrate (4), the upper strata period surface metal structure (5) positioned at upper layer medium substrate (4) upper surface.
- 2. the wave absorbing device of double-layer magnetic media implementation low-frequency range broadened bandwidth according to claim 1, it is characterised in that：It is described Layer dielectric substrate (1), material therefor is in 1GHz-2GHz frequency ranges, and magnetic conductivity drops to 5.88 from 7.9, and dielectric constant exists Near 24, thickness is 0.6 ± 0.05mm.
- 3. the wave absorbing device of double-layer magnetic media implementation low-frequency range broadened bandwidth according to claim 1, it is characterised in that：It is described Upper layer medium substrate (4), material therefor is in 1GHz-2GHz frequency ranges, and magnetic conductivity drops to 4.12 from 4.76, and dielectric constant connects Nearly 16 but change it is little, thickness is 1.4 ± 0.05mm.
- 4. the wave absorbing device of double-layer magnetic media implementation low-frequency range broadened bandwidth according to claim 1, it is characterised in that：It is described Middle level period surface metal structure (3) and upper strata period surface metal structure (5) be metal side's ring structure, but size is not Together.
- 5. the wave absorbing device of double-layer magnetic media implementation low-frequency range broadened bandwidth according to claim 4, it is characterised in that：It is described The square ring outer ring length of side of middle level period surface metal structure (3) is 6.5 ± 0.1mm, and the square ring inner ring length of side is 0.6 ± 0.1mm.
- 6. the wave absorbing device of double-layer magnetic media implementation low-frequency range broadened bandwidth according to claim 4, it is characterised in that：It is described The square ring outer ring length of side of upper strata period surface metal structure (5) be 7.6 ± 0.1mm, the square ring inner ring length of side is 1.5 ± 0.1mm.
- 7. the wave absorbing device of double-layer magnetic media implementation low-frequency range broadened bandwidth according to claim 1, it is characterised in that：The suction Ripple device unit size is (10 ± 0.1) mm* (10 ± 0.1) mm, and wave absorbing device thickness is 2 ± 0.1mm, metallic plate (2) and middle level week Phase surface metal structure (3) and upper strata period surface metal structure (5) are all copper foil, and thickness is 0.02 ± 0.005mm.
- 8. the wave absorbing device of double-layer magnetic media implementation low-frequency range broadened bandwidth according to claim 1, it is characterised in that：The suction The absorptivity calculation formula of ripple device is A (ω)=1-R (ω), and wherein R (ω) is the flat of the modulus value of wave absorbing device input reflection coefficient Side, ω is frequency.
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| CN109546352A (en) * | 2018-12-12 | 2019-03-29 | 浙江大学 | A kind of super matching absorbing material of the two waveband being made of secondary wavelength resonance structure |
| CN113054443A (en) * | 2021-03-23 | 2021-06-29 | 广东顺德西安交通大学研究院 | Low-frequency wave absorber |
| WO2023163363A1 (en) * | 2022-02-25 | 2023-08-31 | 재단법인 파동에너지 극한제어연구단 | Low frequency broadband absorber |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109546352A (en) * | 2018-12-12 | 2019-03-29 | 浙江大学 | A kind of super matching absorbing material of the two waveband being made of secondary wavelength resonance structure |
| CN113054443A (en) * | 2021-03-23 | 2021-06-29 | 广东顺德西安交通大学研究院 | Low-frequency wave absorber |
| CN113054443B (en) * | 2021-03-23 | 2024-02-06 | 广东顺德西安交通大学研究院 | Low-frequency wave absorber |
| WO2023163363A1 (en) * | 2022-02-25 | 2023-08-31 | 재단법인 파동에너지 극한제어연구단 | Low frequency broadband absorber |
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| KR102599456B1 (en) * | 2022-02-25 | 2023-11-08 | 재단법인 파동에너지 극한제어 연구단 | Low frequency broadband absorber |
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