CN108879109A - The ultra wide band angle stabilization Salisbury for loading FSS inhales wave screen - Google Patents
The ultra wide band angle stabilization Salisbury for loading FSS inhales wave screen Download PDFInfo
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- CN108879109A CN108879109A CN201810691205.7A CN201810691205A CN108879109A CN 108879109 A CN108879109 A CN 108879109A CN 201810691205 A CN201810691205 A CN 201810691205A CN 108879109 A CN108879109 A CN 108879109A
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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
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- 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
- H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
The invention proposes the ultra wide band angle stabilization Salisbury of load FSS to inhale wave screen, for solving to inhale the poor technical problem of wave screen stability in the case of all angles electromagnetic wave incident of the existing technology, including the three layers of dielectric-slab stacked gradually from top to bottom, wherein high impedance surface is printed in the upper surface of first layer dielectric-slab, M × N number of periodic arrangement reflector element is printed in the upper surface of second layer dielectric-slab, the lower surface of third layer dielectric-slab is printed with metal floor, reflector element, which is used, returns font structure by what first party ring patch and the second party ring patch being nested in first party ring patch ring formed；One rectangular aperture is set on each side of first party ring patch and second party ring patch, the first and second Chip-Rs are loaded on gap respectively, are respectively set on the inside or outside of first party ring patch and each side of second party ring patch about the first Chip-R and the second Chip-R be symmetrical multipair or at least a pair of of metal minor matters.
Description
Technical field
The invention belongs to microwave technical field, the ultra wide band angle stabilization Salisbury for being related to loading FSS inhales wave screen, can
Applied in the electromagnetic protections such as electromagnetic interference, electromagnetic radiation field.
Background technique
Nineteen fifty-two, the W.W.Salisbury of MIT Radiation Laboratory, which has been invented, is named after one's own name physics suction wave knot
There is Jaumann wave-absorber and breadboardin wave-absorber in succession later in structure.Researcher, which studies, at present more is
Salisbury inhales wave screen, and Salisbury inhales wave screen and is mainly composed of high impedance surface, medium and metal floor, thickness
The substantially a quarter of centre frequency corresponding wavelength.Salisbury, which inhales wave screen, the characteristics of simple structure, suction wavestrip width.
Frequency-selective surfaces (FSS) are a kind of two-dimensional and periodic surfaces that can be reflected electromagnetic wave or be transmitted,
Itself does not absorb energy, can but efficiently control reflection and the transmission performance of electromagnetic wave.Frequency-selective surfaces are according to right
The frequency response characteristic of electromagnetic wave can be divided into two classes：One kind is band resistance type frequency-selective surfaces, to the electromagnetic wave in stopband
Show total reflection characteristic；Another kind of is bandpass-type frequency-selective surfaces, shows total transmissivity spy to the electromagnetic wave in passband
Property.Due to this unique spa-tial filter properties, frequency-selective surfaces have very big application value in engineering field, wherein one
A important application direction is exactly electromagnetic protection field.
In recent years, with the continuous development of microwave technology, absorbent structure is broken through in the absorption bottleneck of low frequency end, widens suction wave
Bandwidth has become electromagnetic wave absorption field urgent problem to be solved.In view of actual application environment, electromagnetic wave is not ideal
Vertical incidence, but suction wave screen is arbitrarily incident on from all directions, so incident angle stability is also electromagnetic wave absorption screen field
Urgent problem to be solved.About inhale wave screen inhale wavestrip it is wide widen in terms of research have many people and give the side of efficiently solving
Case, such as 2015, analogy is easily strong et al. to be delivered in ELECTRONIC COMPONENTS AND MATERIALS the 6th phase of volume 34
The Salisbury of one entitled insertion frequency-selective surfaces inhales the article of wave screen design, discloses and a kind of inhales in Salisbury
The suction wave screen of loaded frequency selective surface in the medium of wave screen, the suction wave screen is by three layers of medium board group stacking gradually from top to bottom
At the upper surface of top layer dielectric-slab is printed with high impedance surface, and the lower surface of underlying dielectric plate is printed with metal floor, in middle layer
The upper surface of dielectric-slab is printed with by two square ring patches time font structure nested up constituted, and is returning font structure
One rectangular aperture is set on each side, is loaded with Chip-R on gap, is made of high impedance surface, medium and earth plate
Salisbury inhales wave screen structure, and wherein high impedance surface can allow the electromagnetic wave almost loss-free incidence for being incident on absorbent structure
Into absorbent structure, metal floor play a part of reflection, allow the electromagnetic wave come in after quarter-wave distance again
Backtracking reaches and cancels out each other between electromagnetic wave incident wave and back wave so that the total distance that electromagnetic wave is passed by is half-wavelength
Effect, the design using periodic arrangement metal patch unit design flexibility, can oneself need frequency range in
Resonance frequency point is set and various structures combine and provide the characteristic of multiple resonance frequency points, the suction wave of wave screen is inhaled in conjunction with Salisbury
Characteristic has been finally reached in 3.5GHz~18.5GHz frequency range the broadband suction wave that (relative bandwidth 136%) effectively inhales wave
Effect.However the design still has improved space in terms of inhaling wave screen incidence angle stability.
Summary of the invention
It is an object of the invention in view of the deficiency of the prior art, propose that the ultra wide band angle of load FSS is steady
Determine Salisbury and inhale wave screen, inhales wave screen stability in the case of all angles electromagnetic wave incident of the existing technology for solving
Poor technical problem.
To achieve the above object, the technical scheme adopted by the invention is as follows：
The ultra wide band angle stabilization Salisbury for loading FSS inhales wave screen, including the first medium stacked gradually from top to bottom
Plate 1, second medium plate 2 and third dielectric-slab 3；The upper surface of the first medium plate 1 is printed with high impedance surface 4；Described second
The upper surface of dielectric-slab 2 is printed with M × N number of periodic arrangement reflector element 5, wherein M >=3, N >=3, the reflector element 5 are adopted
With including the Back Word type being made of first party ring patch 51 and the second party ring patch 52 that is nested in 51 ring of first party ring patch
Structure is respectively arranged a rectangular aperture on four sides of the first party ring patch 51, is loaded with the first Chip-R on gap
R1 53 is respectively arranged a rectangular aperture on four sides of the second party ring patch 52, is loaded with the second Chip-R on gap
R2 54；The lower surface of the third dielectric-slab 3 is printed with metal floor 6；The inside on described 51 4 sides of first party ring patch or
Outside is provided with about the symmetrical multipair metal minor matters of the first Chip-R R1 53；Described 52 4 sides of second party ring patch
Inner or outer side is provided with about symmetrical at least a pair of of the metal minor matters of the second Chip-R R2 54.
The ultra wide band angle stabilization Salisbury suction wave screen of above-mentioned load FSS, the first party ring patch 51, four
The rectangular aperture being arranged on side, positioned at the middle position in each edge lengths direction；The second party ring patch 52 is set on four sides
The rectangular aperture set, positioned at the middle position in each edge lengths direction.
The ultra wide band angle stabilization Salisbury suction wave screen of above-mentioned load FSS, the first party ring patch 51, four
The multipair metal minor matters being arranged on side, positioned at the inside of the first party ring patch 51；The second party ring patch 52, four sides
At least a pair of of metal minor matters of upper setting, positioned at the inside of the second party ring patch 52.
The ultra wide band angle stabilization Salisbury suction wave screen of above-mentioned load FSS, the first party ring patch 51, four
Length direction in upper the first Chip-R R1 53 loaded is vertical with length direction when place, is arranged on the inside of four sides
The height of multipair metal minor matters is successively decreased from centre to two sides constant gradient, and the height of longest metal minor matters is less than the first Chip-R
The length of R1 53；The second party ring patch 52, the length direction of the second Chip-R R2 54 loaded on four sides with
The length direction on place side is vertical, and the height of longest metal minor matters is less than the length of the second Chip-R R2 54.
The ultra wide band angle stabilization Salisbury of above-mentioned load FSS inhales wave screen, the first party ring patch 51 and second party
Ring patch 52, the metal minor matters on the inside of adjacent edge are not overlapped.
The ultra wide band angle stabilization Salisbury suction wave screen of above-mentioned load FSS, the second party ring patch 52, two
Diagonal line is overlapped with two diagonal lines of first party ring patch 51.
Compared with prior art, the present invention having the following advantages that：
The inner or outer side setting that the present invention forms four sides of the annular patch in two sides of reflector element is multipair or a pair of
Metal minor matters, metal minor matters are symmetrical about the resistance loaded on the side of place, highly successively decrease from centre to two sides constant gradient, and longest
The height of metal minor matters is less than the length of corresponding Chip-R, and all metal minor matters are not overlapped, and forms complete central symmetry knot
Structure does not change the absorbing property of incident electromagnetic wave with the variation of incidence angle, compared with prior art, effectively increases suction wave
The incidence angle stability of screen.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is the structural schematic diagram of reflector element of the present invention；
Fig. 3 is the reflection coefficient simulation comparison figure of the present invention and the prior art in 0~35GHz frequency range；
Fig. 4 is the present invention and the prior art simulation result of incidence angle within the scope of 0~45 ° in 0~40GHz frequency range
Figure.
Specific embodiment
In the following with reference to the drawings and specific embodiments, present invention is further described in detail.
Referring to Fig.1, overall structure includes that the first medium plate 1, second medium plate 2 and third stacked gradually from top to bottom is situated between
Scutum 3.
The upper surface of the first medium plate 1 is printed with high impedance surface 4, and high impedance surface selects 377 Ω/square film
Resistance, because the film resistor resistance value is identical as the resistance value of space wave impedance, so that electromagnetic wave can almost loss-free entrance
Absorbent structure.
The upper surface of the second medium plate 2 is printed with M × N number of periodic arrangement reflector element 5, wherein M=N=
10, the distance between each reflector element is 0.4mm, and referring to Fig. 2, it includes by 51 He of first party ring patch which, which uses,
What the second party ring patch 52 being nested in 51 ring of first party ring patch formed goes back to font structure, and the side of first party ring patch 51
Long L1 is 10.4mm, and ring width W1 is 0.4mm, and the side length L2 of second party ring patch 52 is 2.8mm, and ring width W2 is 0.4mm, and second
Two diagonal lines of square ring patch 52 are overlapped with two diagonal lines of first party ring patch 51, this time font structure is for generating two
The dimensional parameters of a resonance frequency point, first party ring patch 51 and second party ring patch 52 are the average perimeter and its institute according to patch
The corresponding wavelength of corresponding resonance frequency equal principle determines, in 51 4 edge lengths directions of first party ring patch
Meta position installs a rectangular aperture, and the long L3 being loaded on the rectangular aperture positioned at 51 inside of first party ring patch is 2mm, wide
W3 is the first Chip-R 53 of 1.2mm, and the length direction of first Chip-R R1 53 is vertical with the length direction on place side
And first Chip-R R1 53 spacing of the length no more than first party ring patch 51 and second party ring patch 52, resistance R1
For 20 Ω, one rectangular aperture is set in the middle position in 52 4 edge lengths directions of second party ring patch, on the rectangular aperture
Being loaded with the long L4 being located on the inside of second party ring patch 52 is 1.1mm, and wide W4 is the second Chip-R 54 of 0.2mm, this second
The length direction of Chip-R R2 54 is vertical with the length direction on place side and the length of the second Chip-R R2 54 cannot surpass
The half of direction patch side length in second party ring patch 52 is crossed, resistance R2 is 300 Ω, the first Chip-R 53 and the second patch electricity
The Chip-R of model 0805 and 0402, the first Chip-R 53 of load and the second Chip-R is respectively adopted in resistance R2 54
54 contribute to consume the electromagnetic wave for being incident on absorbent structure, are divided into S1 between the two sides of the first Chip-R R1 53
To be symmetrical at 0.4mm, two pairs of metal minor matters must be set, and the length of the first Chip-R R1 53 with close to the first Chip-R
The difference in height of the metal minor matters of R1 53 and the difference in height of these two pair metal minor matters are equal, i.e. h1=0.7mm, and the first patch electricity
The metal minor matters of resistance 53 two sides R1 setting do not overlap, and it is at 0.2mm that S2 is divided between the two sides of the second Chip-R R2 54
It is symmetrical that a pair of of metal minor matters, and the length of the second Chip-R R2 54 and the difference in height of adjacent metal minor matters and this must be set
Metal minor matters are equal with the difference in height on the side, i.e. h2=0.35mm, and the metal minor matters of 54 two sides the second Chip-R R2 setting
It does not overlap, the loading method of all metal minor matters and each metal minor matters is provided to increase the symmetry of reflector element 5, adds
It is the area in order to reduce reflector element 5 on the inside of the metal minor matters and the Chip-R side of being all located at ring patch of load, improves structure
Utilization rate, adjacent metal minor matters be not overlapped be because if minor matters be overlapped then angle stability variation.
The lower surface of the third dielectric-slab 3 is printed with metal floor 6, and metal floor selects metallic copper, and metallic copper can be with
It reflects the electromagnetic wave come in is entered, allows and returned into the electromagnetic wave come in by the road quarter-wave distance Hou Zaiyuan
It returns, so that the total distance that electromagnetic wave is passed by is half-wavelength, has the function that cancel out each other between electromagnetic wave incident wave and back wave.
The first medium plate 1 and third dielectric-slab 3, using dielectric constant square plate all the same, thickness point
Not Wei H1=3.4mm, H3=0.8mm, side length D=10.8mm, dielectric constant 1.1, it is entire that the two dielectric-slabs play support
The effect of absorbent structure, the second medium plate 2 is also using square plate, thickness H2=0.8mm, side length D=10.8mm,
Dielectric constant is 2.65, according to industrial practical, for pcb board, the parameter and dielectric constant of itself be it is relatively-stationary,
We select F4B (dielectric constant 2.65, with a thickness of 0.8mm), and the thickness of entire absorbent structure is the suction wave knot according to design
The suction wave frequency section of structure determines, because we want to design one kind and can be realized in 8.99GHz~34.66GHz band limits
The ultra wide band angle stabilization absorbent structure of wave is effectively inhaled, the center that we inhale the thickness of wave screen using Salisbury and it works
Have 1/4 relationship between the corresponding wavelength of frequency, may finally determine Salisbury inhale wave screen with a thickness of 5mm, loading
In the Salisbury absorbent structure unit of FSS, total reflection characteristic is presented in FSS, can be regarded as a reflecting surface, generates one
A absorption peak, so FSS own resonance feature is not merely considered, it is also contemplated that high impedance surface 4 arrives when determining the position of FSS
Whether the distance of FSS matches with the working frequency corresponding wavelength of FSS, because absorbent structure itself is by certain after loading FSS
Degree influences, and response curve will be a certain deviation with discreet value, so to come in conjunction with concrete condition after determining loading position
The size of FSS is adjusted, finally loads Back Word type structure in the position for being 3.4mm apart from high impedance surface 4, because of second medium plate
2 thickness is fixed, so the thickness of H3 is 0.8mm.
The course of work of entire absorbent structure can be divided into two parts, first is that electromagnetic wave is almost so lossless that enter suction wave knot
Structure, that is, high impedance surface 4 play the role of, and the two electromagnetism wave energy for being into absorbent structure are depleted, that is, metal
The effect that all Chip-R collective effects of floor 6 and load play, wherein the ultra wide band angle stabilization that the present invention designs
Inhaling the ultra wide band in wave is mainly on the basis of existing technology to increase the average perimeter of first party ring patch 51 and by second
The average perimeter of square ring patch 52 reduces, and achievees the purpose that spread bandwidth with this, angle stabilization is by load in certain
The metal minor matters of rule distribution are realized to improve the centre symmetry of total.
Below in conjunction with l-G simulation test, technical effect of the invention is described further：
1, simulated conditions and content：
Using business simulation software HFSS_15.0 to the prior art and the incident electromagnetic wave of the invention in 0~40GHz frequency range
Reflection coefficient carry out simulation calculation, as a result as shown in figure 3, the figure is the prior art and reflection coefficient simulation comparison of the invention
Figure, and simulation calculation is carried out to reflection coefficient of the embodiment in 0~45° angle domain, as a result as shown in figure 4, Fig. 4 (a) is existing
There is stickogram of the technology in 0~45° angle domain, Fig. 4 (b) is stickogram of the present invention in 0~45° angle domain.
2, analysis of simulation result：
Referring to Fig. 3, the centre frequency of embodiment is 21.8GHz, -8dB inhale wavestrip wide frequency ranges be 8.99GHz~
34.66GHz, absolute bandwidth 25.67GHz realize ultra wide band microwave absorbing property, and the centre frequency for the original technology that compares is
It is 3.5GHz~18.5GHz that 11GHz, -8dB, which inhale wavestrip wide frequency ranges, and absolute bandwidth 15GHz, the present invention is by absolute bandwidth
10.67GHz is improved, so that the suction wavestrip for effectively having widened absorbent structure is wide.
Referring to Fig. 4, by the tendency of curve in Fig. 4 (a) and Fig. 4 (b), it can will be apparent that finding out walking for curve in Fig. 4 (b)
Gesture is more consistent relative to the tendency of curve in Fig. 4 (a), and explanatory diagram 4 (b) is that the structure that the present invention designs has good incidence
Angle angle stability has reached the original intention of our designs.
The above simulation result explanation, the present invention realize ultra wide band angle stabilization microwave absorbing property.
Above description is only the embodiment of the present invention, does not constitute any limitation of the invention, it is clear that for this field
For professional, after having understood the content of present invention and principle, it may all carry out without departing from the principles of the invention
Various modifications and variations in form and details, but these modifications and variations based on inventive concept are still in power of the invention
Within the protection scope that benefit requires.
Claims (6)
1. the ultra wide band angle stabilization Salisbury for loading FSS inhales wave screen, including the first medium plate stacked gradually from top to bottom
(1), second medium plate (2) and third dielectric-slab (3)；The upper surface of the first medium plate (1) is printed with high impedance surface (4)；
The upper surface of the second medium plate (2) is printed with M × N number of periodic arrangement reflector element (5), wherein M >=3, N >=3,
It includes by first party ring patch (51) and the second party ring being nested in first party ring patch (51) ring that the reflector element (5), which uses,
Patch (52) composition returns font structure, and a rectangular aperture is respectively arranged on four sides of the first party ring patch (51), stitches
It is loaded with the first Chip-R R1 (53) in gap, a rectangular slits are respectively set on four sides of the second party ring patch (52)
Gap is loaded with the second Chip-R R2 (54) on gap；The lower surface of the third dielectric-slab (3) is printed with metal floor (6)；
It is characterized in that：The first party ring patch is provided on the inside or outside of (51) four sides about the first Chip-R R1 (53)
Symmetrical multipair metal minor matters；It is provided on the inside or outside of (52) four sides of the second party ring patch about the second patch electricity
Hinder R2 (54) symmetrical at least a pair of of metal minor matters.
2. the ultra wide band angle stabilization Salisbury of load FSS according to claim 1 inhales wave screen, it is characterised in that：Institute
State first party ring patch (51), the rectangular aperture being arranged on four sides, positioned at the middle position in each edge lengths direction；Described
Two side's ring patches (52), the rectangular aperture being arranged on four sides, positioned at the middle position in each edge lengths direction.
3. the ultra wide band angle stabilization Salisbury of load FSS according to claim 2 inhales wave screen, it is characterised in that：Institute
First party ring patch (51) is stated, the multipair metal minor matters being arranged on four sides are located at the inside of the first party ring patch (51)；
The second party ring patch (52), at least a pair of of the metal minor matters being arranged on four sides, is located at the second party ring patch (52)
Inside.
4. the ultra wide band angle stabilization Salisbury of load FSS according to claim 3 inhales wave screen, it is characterised in that：Institute
State length when first party ring patch (51), four length directions in upper the first Chip-R R1 (53) loaded and place
Direction is vertical, and the height for the multipair metal minor matters being arranged on the inside of four sides is successively decreased from centre to two sides constant gradient, and longest metal
Length of the height of minor matters less than the first Chip-R R1 (53)；The second party ring patch (52) loads on four sides
The length direction of second Chip-R R2 (54) is vertical with the length direction on place side, and the height of longest metal minor matters is less than
The length of two Chip-R R2 (54).
5. the ultra wide band angle stabilization Salisbury of load FSS according to claim 4 inhales wave screen, it is characterised in that：Institute
First party ring patch (51) and second party ring patch (52) are stated, the metal minor matters on the inside of adjacent edge are not overlapped.
6. the ultra wide band angle stabilization Salisbury of load FSS according to claim 1 inhales wave screen, it is characterised in that：Institute
Second party ring patch (52) is stated, two diagonal lines are overlapped with two diagonal lines of first party ring patch (51).
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Cited By (7)
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| 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 |
| CN110132446A (en) * | 2019-05-27 | 2019-08-16 | 电子科技大学 | A kind of electromagnetic oven temp measuring system based on the load super surface of thermistor electromagnetism |
| CN110366361A (en) * | 2019-08-06 | 2019-10-22 | 集美大学 | A kind of wave absorbing device based on super surface |
| CN112164896A (en) * | 2020-09-23 | 2021-01-01 | 中国人民解放军空军工程大学 | Low-frequency ultra-wideband wave absorber based on magnetic material and lumped device |
| CN113612031A (en) * | 2021-07-30 | 2021-11-05 | 苏州大学 | Flexible reflection enhanced surface structure for vehicle-mounted radar test and preparation method thereof |
| CN113839214A (en) * | 2021-09-17 | 2021-12-24 | 电子科技大学 | Passive sub-wavelength absorber for cylindrical electromagnetic waves |
| CN114204279A (en) * | 2021-12-14 | 2022-03-18 | 中南大学 | Resistance loading quad ring ultra wide band absorbing structure |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110132446A (en) * | 2019-05-27 | 2019-08-16 | 电子科技大学 | A kind of electromagnetic oven temp measuring system based on the load super surface of thermistor electromagnetism |
| CN110132446B (en) * | 2019-05-27 | 2020-07-21 | 电子科技大学 | Electromagnetic oven temperature measurement system based on loading thermistor electromagnetic super-surface |
| CN110366361A (en) * | 2019-08-06 | 2019-10-22 | 集美大学 | A kind of wave absorbing device based on super surface |
| CN112164896A (en) * | 2020-09-23 | 2021-01-01 | 中国人民解放军空军工程大学 | Low-frequency ultra-wideband wave absorber based on magnetic material and lumped device |
| CN113612031A (en) * | 2021-07-30 | 2021-11-05 | 苏州大学 | Flexible reflection enhanced surface structure for vehicle-mounted radar test and preparation method thereof |
| CN113839214A (en) * | 2021-09-17 | 2021-12-24 | 电子科技大学 | Passive sub-wavelength absorber for cylindrical electromagnetic waves |
| CN113839214B (en) * | 2021-09-17 | 2022-11-22 | 电子科技大学 | Passive sub-wavelength absorber for cylindrical electromagnetic waves |
| CN114204279A (en) * | 2021-12-14 | 2022-03-18 | 中南大学 | Resistance loading quad ring ultra wide band absorbing structure |
| CN114204279B (en) * | 2021-12-14 | 2022-08-26 | 中南大学 | Resistance loading quad ring ultra wide band absorbing structure |
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