CN107565223A - A kind of stealthy random surface of ultra wide band complete polarization and its design method - Google Patents
A kind of stealthy random surface of ultra wide band complete polarization and its design method Download PDFInfo
- Publication number
- CN107565223A CN107565223A CN201710541953.2A CN201710541953A CN107565223A CN 107565223 A CN107565223 A CN 107565223A CN 201710541953 A CN201710541953 A CN 201710541953A CN 107565223 A CN107565223 A CN 107565223A
- Authority
- CN
- China
- Prior art keywords
- random surface
- mrow
- stealthy
- wide band
- ultra wide
- 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
Landscapes
- Aerials With Secondary Devices (AREA)
Abstract
The invention discloses a kind of stealthy random surface of ultra wide band complete polarization and its design method, cellular construction is upper strata metal patch layer, the continuous metal backing of medium substrate and lower floor, and three sequentially combines；Designed random surface is scattered using theoretical realize of microstrip reflectarray antenna to the non-directional of electromagnetic wave, and each unit structure of random surface is identical, but each unit size is different；The method of HFSS automatic Parametrics modeling is applied to the continuous establishment of this model；Want to realize that the automation of different dimension cells generates and obtains required ordered arrangement, the automatic modeling that random surface is completed in design can be programmed by MATLAB softwares.Random surface design principle difficulty proposed by the present invention is smaller, while having ultra wide band low RCS characteristics, also possesses the insensitive characteristic of polarization；And have extremely low section, thinner thickness, lighter weight, it is easy to process the advantages of, the electromagnetism stealth fields such as each equipment platform and weapon platform can be widely used in.
Description
Technical field
The invention belongs to Electromagnetic Field and Microwave Technology field, more particularly to a kind of stealthy random surface of ultra wide band complete polarization and
Its design method.
Background technology
Stealth technology plays more and more important role in modern military war, more and more multiple in modern military
Miscellaneous electromagnetic environment, the Stealth Fighter of weapon platform fights survival probability to it and penetration ability plays vital effect.
At this stage for the stealth technology comparative maturity of aircraft profile, based on the carrier target such as this current situation, aircraft
RCS (Radar Cross-Section, RCS) can preferably be reduced.It is well known that radar invisible skill
Art beats deep ability and combat survivability for the longitudinal direction of raising armament equipment to be had the function that to hold the balance, and is always military neck
Important research topic in domain.However, with the continuous development of the radar exploration technique, traditional radar stealth technology is no longer
Can meet the needs of modern military, urgently need to change stealth technology.The novel artificial electromagnetism material occurred in recent years
Material, the Stealth Fighter for improving equipment for people provide new thinking.The stealthy equipment designed using Novel manual electromagnetic material
Good stealth effect can be realized, but the material of this kind of stealthy devices use electromagnetic parameter gradual change changes the propagation road of light
Footpath, it is general to be formed using the jacket layer construction of multilayer artificial electromagnetic material, so size is larger, is difficult to prepare, it is limited in reality
Application in the engineering of border.Novel artificial resistance electromagnetic surface is surpassed by what the construction unit cycle arrangement of Novel manual electromagnetic material was formed
Thin array plane, it is the study hotspot of nearly 2 years Novel manual electromagnetic materials.By the structure and the arrangement that adjust sub-wavelength unit
Mode, novel artificial resistance electromagnetic surface can realize the similar unusual electromagnet phenomenon of Novel manual electromagnetic material, and can also realize
The characteristics such as the amplitude of electromagnetic wave, phase, polarization mode, communication mode freely regulate and control.In many applications, novel artificial electromagnetism
Surface can substitute artificial electromagnetic material and realize identical function, and compared to Novel manual electromagnetic material, have structure light
The advantages such as thin, loss is smaller, the simple, handling ease of realization.Therefore, novel artificial resistance electromagnetic surface is by feat of its superior performance,
There is huge development potentiality and important researching value in stealthy field.
Although perfect absorbing material has many advantages compared to traditional absorbing material.First, between the construction unit
Absorb independently of each other, suction ripple rate is not high to periodicity requirements, is advantageous to load the material in the confined space；Secondly, the structure
It is ultra-thin light, it is easily integrated, such as can be embedded on the basis of weight, complexity is not increased in antenna；Finally, the structure
Processing be generally available medium substrate etching form, cost is low, easy to maintenance.However, there is also certain for perfect absorbing material
Defect, preferable microwave absorbing property are existed only in arrowband, and this is as caused by using EMR electromagnetic resonance in its principle.In order to expand work
Bandwidth, the structure of multilayer resonant element can be utilized, but the bandspreading of this method is limited in one's ability, and it is overall to sacrifice
Thickness be cost.Furthermore, it is possible to load the method for lamped element, but material thickness is still added, and add system
Make the complexity of technique, be unfavorable for large-scale production and application.Also a kind of method of loading resistor piece, though do not dramatically increase material
Integral thickness, but Absorber Bandwidth can not be widened on a large scale.
Surface i.e. " the random table formed using the electromagnetic parameter or reflected phase on artificial electromagnetic surface via random distribution
Face ", it can be realized to the astaticism scattering for electromagnetic wave, and is advantageous to the reduction of back scattering, have well hidden
Body performance.Liu R, Ji C, Mock J J et al. periodical literature " Random gradient index
Metamaterials ", Metamaterials, 2008International Workshop on IEEE, 2008:248-250,
It sets about have studied novel artificial resistance electromagnetic surface (Metasurface), make use of the non-uniform Distribution of surface electromagnetic parameter with
To the surface refractive index of the gradient of random distribution, it is irreflexive that this surface covering can make it that back wave is presented on a metal plate
Effect, it can effectively suppress back scattering, but it also needs the achievable broadband Stealth Fighter of further design excellent.
The content of the invention
Goal of the invention：For problem above, the present invention proposes a kind of stealthy random surface of ultra wide band complete polarization and its design
Method, while ensure that random surface has ultra wide band Stealth, the integral thickness of random surface is relatively thin, easy to process；
Freely it can be combined with structures such as the coverings, shell, protective cover of most thickness, so as to play the electrical of its uniqueness
Energy.
Technical scheme：To realize the purpose of the present invention, the technical solution adopted in the present invention is：A kind of ultra wide band complete polarization
Stealthy random surface, including some cellular constructions, the cellular construction include upper strata metal patch layer, medium substrate and lower floor and connected
Continuous metal backing；The upper strata metal patch layer is more foldings bicyclic paster of the etching on surface；The random surface utilizes
Theoretical realize of microstrip reflectarray antenna scatters to the non-directional of electromagnetic wave, and some cellular constructions of random surface are identical, and size is not
Together.
Further, medium substrate uses high-frequency microwave circuit board；Upper strata metal patch layer is that ten thousand word Buddhists print ring.
A kind of design method of the stealthy random surface of ultra wide band complete polarization, specifically includes following steps：
(1) bandwidth of random surface and section requirement needed for, selects suitable chip unit, and provide equivalent electric
Road；
(2) according to the electrical property equivalent circuit of corresponding transmission line, the phase formula of basic structure is drawn, equivalent reactance is public
Formula and phase change rate formula；
(3) by the phase formula of elementary cell, the parameter request of equivalent reactance formula and phase change rate formula, obtain
Go out the parameter area of the basic structure of random surface；
(4) automatic modeling of design completion random surface is programmed by MATLAB softwares；
(5) rapidoprint is selected, designed random surface finished product is produced using copper-clad laminate technology.
Phase formula is：
Equivalent reactance formula is：
Phase change rate formula is：
Wherein, ε0It is the wave impedance of free space, R, L, C are respectively equivalent resistance, equivalent inductance and the equivalent electric of paster
Hold, Q is quality factor, and X is equivalent reactance, ω0It is the resonant frequency of elementary cell, Z0For the free impedance of free space.
Step specifically includes in (4)：
(1) random surface is generated by various sizes of cellular construction after ordered arrangement；
(2) because the limitation of existing antenna size, the number and arrangement mode of required chip unit are limited；
(3) because the function restriction of HFSS and MATLAB softwares, realize that automated procedures need to combine both；
The autochart of correlation is designed in MATLAB, is called in HFSS and then automatically generates required random surface；
(4) chip unit stochastic variable is designed to L, so it is exactly variables L to need random part, other numerical value are fixed
It need not change.
In step (5)：Short transmission line is replaced with high-frequency microwave circuit board, obtains capacitive character metal patch layer, impedance matching
The random surface structure that medium flaggy and inductive metal patch layer are formed；Dielectric-slab and metal patch layer closely connect during processing
Connect, pressed using copper-clad laminate technology；Metal patch is from silver or copper.
Beneficial effect：The present invention also possesses the insensitive spy of polarization while ensure that RCS characteristics low with ultra wide band
Property；And have extremely low section, thinner thickness, lighter weight, it is easy to process the advantages of, each equipment platform can be widely used in
With the electromagnetism stealth field such as weapon platform, so as to play its unique electrical property；In Stealth, electromagnetic compatibility, radiation shield
The field such as covering has very high practical value.
Brief description of the drawings
Fig. 1 is random surface complete structure top view；
Fig. 2 is random surface cellular construction top view；
Fig. 3 is random surface cellular construction side view；
Fig. 4 is the effective transmission line chart of random surface cellular construction；
Fig. 5 is that random surface cellular construction changes phase shift curve map with L；
The mono- static RCS curve map of random surface and metallic plate when Fig. 6 is complete polarization plane wave vertical incidence；
Random surface mono- static RCS curve reduced value curve map when Fig. 7 is complete polarization plane wave vertical incidence；
RCS value curve maps when Fig. 8 is large angle incidence under X polarization；
RCS value curve maps when Fig. 9 is large angle incidence under Y polarization；
The three-dimensional RCS distribution maps of metallic plate when Figure 10 is X polarization plane ripple vertical incidence；
The three-dimensional RCS distribution maps of random surface when Figure 11 is X polarization plane ripple vertical incidence；
The three-dimensional RCS distribution maps of metallic plate when Figure 12 is Y polarization plane ripple vertical incidence；
The three-dimensional RCS distribution maps of random surface when Figure 13 is Y polarization plane ripple vertical incidence.
Embodiment
Technical scheme is further described with reference to the accompanying drawings and examples.
It is the stealthy random surface of ultra wide band complete polarization of the present invention as shown in Figure 1, includes some cellular constructions, the unit knot
Structure includes upper strata metal patch layer, the continuous metal backing of medium substrate and lower floor, and three sequentially combines；And the upper strata
The unit of metal patch layer is that ten thousand word Buddhists print ring, medium substrate F4B.Designed random surface utilizes microstrip reflectarray antenna
Theory is realized to be scattered to the non-directional of electromagnetic wave, and each unit structure of random surface is identical, but each unit size is different.
Similar to microstrip reflection array element, the cellular construction of random surface is also required to meet broadband phase shift standard, adopts herein
With a kind of units for folding twin nuclei, its top view is as shown in Fig. 2 side view is as shown in Figure 3 more.The structure is by medium base
Plate, etching form in the bicyclic paster of more foldings on surface and continuous metal backing.Using F4B as medium substrate, dielectric
Constant 2.65, loss angle tangent 0.001.The length of side and shorter two length of sides of outer shroud are L in the rectangular metal ring structure of upper strata, ring
Line width is W, and two interannulars are away from for G.Unit is emulated using Floquet ports in HFSS13, unit can be obtained
Phase-Shifting Characteristics.
Here the bicyclic unit of more foldings proposed is a dual resonance structure, by dielectric substrate thickness H, metal line width
W, adjusting and optimizing of the interannular away from parameters such as G, dielectric substrate thickness are the thickness that H is 4mm, upper strata metal structure and metal ground plate
It is 0.018mm.The cycle P of unit is chosen for half-wavelength size, i.e. 15mm.It can make it that two resonant frequencies are close to each other,
Reach the target of broadened bandwidth using double resonance.By multiple optimization design, final size is obtained：W=0.55mm, G=
0.4mm.The size L for choosing upper strata metal structure is scanning variable, the unit phase shift curve changed with L is observed, such as Fig. 5 institutes
Show.Because we design target operation frequency range be 6-14GHz, therefore, in figure give unit 6GHz, 7GHz, 8GHz,
Phase shift curve on nine frequencies of 9GHz, 10GHz, 11GHz, 12GHz, 13GHz and 14GHz.
The cellular construction is weighed using the standard of broadband phase-shifting unit：On each frequency, when L is in minimum value and maximum
When changing between value, the maximum phase shift range of unit is above 360 °；Phase shift slope of a curve is smaller, that is to say, that unit it is anti-
Penetrate change unobvious of the phase with size, it is meant that cellular construction is insensitive to mismachining tolerance；The reflected phase of unit with
Unit size change is in once linear relationship, and unit can equably realize phase on each point in change in size effective range
Position compensation.Further, it can be seen that the phase shift curve under different frequency is almost parallel, illustrate the reflected phase and chi of each frequency unit
Very little variation relation is similar, if changing frequency, phase shift curvilinear trend is constant, and simply in the presence of a relative displacement, this property can
So that design becomes easy, the phase shift curve for choosing single frequency point is applicable to whole frequency range.
The design method of the stealthy random surface of ultra wide band complete polarization of the present invention, specifically comprises the following steps：
(1) bandwidth of random surface and section requirement needed for, selects suitable chip unit, and provide simple etc.
Imitate circuit.
To meet the requirement of ultra wide band and low section, individual layer paster structure is selected, its equivalent circuit can be according to circuit analysis
Basic theories is drawn.This circuit is served only for briefly describing operation principle, therefore the numerical value of these electrical components need not be quantified, and is only needed
Qualitative description.
The equivalent circuit of wave filter in the present embodiment is as shown in figure 4, first, the input of two-port network and output impedance
With the free impedance Z of free space0=377 Ω are brought into；Secondly, equivalent circuit is corresponded in structure, Z0Use free space
Free impedance replaces, and electric capacity C realizes its capacitance characteristic, transmission line Z using layer of metal paster12It is realized using one layer of dielectric layer
Impedance operator, inductance L realize its inductance characteristic using layer of metal paster；It is thin metal patch layer to obtain first and third layer, second
Layer is to have certain thickness dielectric layer.
(2) according to the electrical property equivalent circuit of corresponding transmission line, it can be deduced that the phase formula of basic structure, equivalent electric
Anti- formula and phase change rate formula.
The value of electrical component is corresponded in random surface structure by below equation in circuit obtains paster and dielectric layer
Design parameter scope：
Wherein, ε0It is the wave impedance of free space, R, L, C are respectively the equivalent resistance, inductance and electric capacity of paster；Q is matter
The factor is measured, X is equivalent reactance, ω0It is the resonant frequency of elementary cell.
In order to obtain broadband phase shifting component, near resonant frequency, phase change rate should be as flat as possible.Phase change rate
It can write：
Due to the low-k of substrate, it would be desirable to increase substrate thickness further to reduce quality factor and improve phase
The position linearity.Interior Q-RING inserts ten thousand word Buddhists print ring element, is for avoid total phase by introducing another resonant frequency
Position scope is reduced.εrFor the dielectric constant of the particular medium layer of selection, P is the unit periodic dimensions of frequency-selective surfaces, upper strata
The length of side and shorter two length of sides of outer shroud are L in rectangular metal ring structure, and it is D that loop wire is wide, and two interannulars are away from being also G.Pass through
To dielectric substrate thickness H, metal line width D, adjusting and optimizing of the interannular away from parameters such as G, preferable phase shift curve can be obtained.According to
Parallel circuit resonant frequencyObtain resonant frequency and be proportional to unit periodic dimensions P.
(3) by the phase formula of elementary cell, the parameter request of equivalent reactance formula and phase change rate formula, obtain
Go out the parameter area of the basic structure of random surface.
For microstrip reflectarray antenna, the radiating element of reflective array is typically resonance structure, near resonant frequency
Phase place change is obvious, and the dimensional parameters of adjustment unit realize phase shift function.In order to realize the reflective array performance in broadband, microstrip element
Need the Phase-Shifting Characteristics with broadband.This requirement is equally applicable to the design of random surface unit.The weighing apparatus of broadband phase-shifting unit
Amount standard has following three points normative reference：(1) in the frequency band applied, the maximum phase shift range of unit should meet 360 °,
So ensure the scattered of reflected phase to greatest extent, the direction of back wave will more disorderly and more unsystematic diffusing reflection effect it is brighter
It is aobvious；(2) the phase shift curve linear degree of unit should be preferable, and the preferable unit of the linearity changes at random in size effective range
When can realize uniform phase compensation on difference；(3) the phase shift curve of phase-shifting unit can not have larger slope, change
Speech is exactly that its curve should have smaller than shallower, because phase shift slope of a curve is the symbol of fabrication tolerance susceptibility
The unit of some slopes will not acutely change radiating phase when manufacturing because of unavoidable slight error.
The design parameter of the stealthy random surface of ultra wide band complete polarization proposed in the present embodiment is as shown in table 1, the structure by
Medium substrate, etch the ten thousand word Buddhists on surface and print ring-like paster and continuous metal backing composition.Using F4B as medium base
The thickness of plate, dielectric constant 2.65, loss angle tangent 0.001, dielectric substrate thickness H, upper strata metal structure and metal ground plate
Degree is 0.018mm.The cycle P of unit is chosen for half-wavelength size, i.e. 15mm, and upper strata metal structure length is L, the wide W of loop wire,
Two interannulars are away from for G.The shape of design is not unique, and the structure of the present embodiment is to complete the result after parameter optimization.As being in Fig. 1
The schematic top plan view of random surface complete structure, herein from the array structure of 10*10 unit composition, specific element number can
Visual field, which is closed, to be needed to determine, such as table 1.
Table 1
| Parameter name | H | D | G | P |
| Parameter value | 4mm | 0.55mm | 0.4mm | 15mm |
The cellular construction is weighed with the standard of broadband phase-shifting unit：On each frequency, when L is in minimum value and maximum
Between when changing, the maximum phase shift range of unit is above 360 °；Phase shift slope of a curve is smaller, that is to say, that the reflection of unit
Phase is with the change unobvious of size, it is meant that cellular construction is insensitive to mismachining tolerance；The reflected phase of unit is with list
Elemental size change is in once linear relationship, and unit can equably realize phase on each point in change in size effective range
Compensation.Further, it can be seen that the phase shift curve under different frequency is almost parallel, illustrate the reflected phase and size of each frequency unit
Variation relation it is similar, if changing frequency, phase shift curvilinear trend is constant, and simply in the presence of a relative displacement, this property can be with
Design is set to become easy, the phase shift curve for choosing single frequency point is applicable to whole frequency range.
(4) automatic modeling of design completion random surface is programmed by MATLAB softwares.
The each unit structure of random surface is identical, but each unit size is different.The method of HFSS automatic Parametrics modeling
Suitable for the continuous establishment of this model, particularly with the structure that model of element is complicated, there is very high efficiency.Want to realize not
Automation with dimension cells generates and obtains required ordered arrangement, needs exist for being programmed by MATLAB softwares and sets
Meter.
Thinking and requirement are as follows：(1) random surface generates after being arranged by various sizes of cellular construction via sequence；(2)
Due to the limitation of existing antenna size, the number and arrangement mode of the chip unit of required generation are similarly obtained limitation；(3)
Because the function restriction of HFSS and MATLAB softwares, realize that required automated procedures need to combine both；In MATLAB
Related autochart is designed, is finally called in HFSS and then automatically generates required random surface；(4) paster
Unit stochastic variable is designed to L, so it is exactly variables L to need random part, in addition other numerical value are fixed
It need not change.
(5) suitable rapidoprint is selected, designed random surface finished product is produced using copper-clad laminate technology.
The processing exemplar on selection surface includes 10*10 unit a period of time, first layer and second layer metal paster from conductive
The splendid metal of performance, optimal material are silver, and resistivity is 15.86 ρ/n Ω m, and typically from copper, resistivity is 16.78 ρ/n
Ω m, you can have preferable effect.Paster thickness control has no significant effect, paster in 35um-70um to structure electrical property
Pattern form using printed circuit board (PCB) national regulation (QJ3103-99) standard technology etching be made.The dielectric-slab in intermediate layer needs
Meet the relative dielectric constant requirement derived during design, while ensure that loss angle tangent is as relatively low as possible, carried in the present invention
The structure gone out selects F4B high-frequency microwave circuit board, works well.Dielectric-slab and metal patch layer need closely to connect during processing
Connect, pressed using in printed circuit board (PCB) national regulation (GB4722-84) using copper-clad laminate standard technique.
Wherein, intermediate layer uses high-frequency microwave circuit board, its type selecting and equivalent transmission line model in step (2), may be selected
F4B high-frequency microwave circuit boards.It should be noted to be typically chosen n*n (n is positive integer) individual unit compositions during random surface actual processing
Complete structure is to embody its cyclophysis.
Random surface unit integrally has fully rotating symmetry characteristic, and this characteristic assigns its certain polarizer stability.
It also has certain angle stability simultaneously, but is not full symmetric because the size of random surface each unit is random, so
Angle wants have obvious stability when element number is enough big.
Emulated by the softwares of HFSS 13, random surface and gold when being complete polarization plane wave vertical incidence as shown in Figure 6
Belong to the mono- static RCS curve of plate, random surface mono- static RCS curve reduced value when being complete polarization plane wave vertical incidence as shown in Figure 7.
Visible random surface has significant Stealth Fighter in Fig. 6 and Fig. 7, and its stealthy frequency band is right with a width of 12GHz from 6GHz-18GHz
Reach 100% in relative bandwidth of the center frequency point 10GHz reduced value more than 5dB, the stealthy platform of whole X-band is completely covered
Conventional frequency range, the aerodiscone antenna for being also covered by whole 6-18GHz often use frequency range, far beyond typically stealthy relative in the prior art
Bandwidth.Maximum reduced value is 30.3dB, with radar equation calculate understand, when RCS decline 30.3dB, the detectable distance of radar can under
Drop 82.5%, therefore, in whole frequency range, Stealth Fighter has obtained the lifting arrived very much.
Meanwhile be as shown in Figure 8 RCS values during large angle incidence under X polarization, it is that wide-angle enters under Y polarizes as shown in Figure 9
RCS values when penetrating, the visible random surface also has certain angle stability from Fig. 8 and Fig. 9.
When being X polarization plane ripple vertical incidence as shown in Figure 10, the three-dimensional RCS distribution maps of metallic plate, are X as shown in figure 11
The three-dimensional RCS distribution maps of random surface, it is Y polarization plane ripple vertical incidence as shown in figure 12 during polarization plane ripple vertical incidence
When, the three-dimensional RCS distribution maps of metallic plate, when being Y polarization plane ripple vertical incidence as shown in figure 13, the three-dimensional RCS of random surface
Distribution map.Figure 10 to Figure 13 is the random surface three-dimensional RCS distribution maps in the case of electromagnetic wave vertical incidence, can intuitively be drawn
Relative to metallic plate, the scattering peak of random surface is in random mixed and disorderly distribution, thus back scattering substantially weakens, it was demonstrated that this is random
Surface has preferable stealth effect.
Claims (8)
- A kind of 1. stealthy random surface of ultra wide band complete polarization, it is characterised in that：Including some cellular constructions, the cellular construction bag Include upper strata metal patch layer, the continuous metal backing of medium substrate and lower floor；The upper strata metal patch layer is etching on surface The bicyclic paster of more foldings；The random surface is scattered using theoretical realize of microstrip reflectarray antenna to the non-directional of electromagnetic wave, Some cellular constructions of random surface are identical, and size is different.
- 2. the stealthy random surface of ultra wide band complete polarization according to claim 1, it is characterised in that：The medium substrate uses High-frequency microwave circuit board.
- 3. the stealthy random surface of ultra wide band complete polarization according to claim 1, it is characterised in that：The upper strata metal patch Layer prints ring for ten thousand word Buddhists.
- A kind of 4. design method of the stealthy random surface of ultra wide band complete polarization, it is characterised in that：Specifically include following steps：(1) bandwidth of random surface and section requirement needed for, selects suitable chip unit, and provide equivalent circuit；(2) according to the electrical property equivalent circuit of corresponding transmission line, draw the phase formula of basic structure, equivalent reactance formula with And phase change rate formula；(3) by the phase formula of elementary cell, the parameter request of equivalent reactance formula and phase change rate formula, draw with The parameter area of the basic structure on machine surface；(4) automatic modeling of design completion random surface is programmed by MATLAB softwares；(5) rapidoprint is selected, designed random surface finished product is produced using copper-clad laminate technology.
- 5. the design method of the stealthy random surface of ultra wide band complete polarization according to claim 4, it is characterised in that：The phase Position formula be：Equivalent reactance formula is：<mrow> <mi>x</mi> <mo>=</mo> <mo>-</mo> <mfrac> <mrow> <mo>(</mo> <mi>&omega;</mi> <mi>C</mi> <mo>-</mo> <mfrac> <mn>1</mn> <mrow> <mi>&omega;</mi> <mi>L</mi> </mrow> </mfrac> <mo>)</mo> </mrow> <mrow> <mo>&lsqb;</mo> <msup> <mrow> <mo>(</mo> <mi>&omega;</mi> <mi>C</mi> <mo>-</mo> <mfrac> <mn>1</mn> <mrow> <mi>&omega;</mi> <mi>L</mi> </mrow> </mfrac> <mo>)</mo> </mrow> <mn>2</mn> </msup> <mo>+</mo> <mfrac> <mn>1</mn> <msup> <mi>R</mi> <mn>2</mn> </msup> </mfrac> <mo>&rsqb;</mo> </mrow> </mfrac> </mrow>Phase change rate formula is：<mrow> <msub> <mi>&epsiv;</mi> <mn>0</mn> </msub> <mo>=</mo> <mfrac> <mrow> <mn>4</mn> <msub> <mi>RQZ</mi> <mn>0</mn> </msub> </mrow> <mrow> <msub> <mi>&omega;</mi> <mn>0</mn> </msub> <mrow> <mo>(</mo> <msup> <mi>R</mi> <mn>2</mn> </msup> <mo>-</mo> <msubsup> <mi>Z</mi> <mn>0</mn> <mn>2</mn> </msubsup> <mo>)</mo> </mrow> </mrow> </mfrac> </mrow>Wherein, ε0It is the wave impedance of free space, R, L, C are respectively equivalent resistance, equivalent inductance and the equivalent capacity of paster, and Q is Quality factor, X are equivalent reactances, ω0It is the resonant frequency of elementary cell, Z0For the free impedance of free space.
- 6. the design method of the stealthy random surface of ultra wide band complete polarization according to claim 4, it is characterised in that：The step Suddenly specifically included in (4)：(1) random surface is generated by various sizes of cellular construction after ordered arrangement；(2) because the limitation of existing antenna size, the number and arrangement mode of required chip unit are limited；(3) because the function restriction of HFSS and MATLAB softwares, realize that automated procedures need to combine both；In MATLAB Related autochart is designed, is called in HFSS and then automatically generates required random surface；(4) chip unit stochastic variable is designed to L, so it is exactly variables L to need random part, other numerical value are fixed and are not required to Change.
- 7. the design method of the stealthy random surface of ultra wide band complete polarization according to claim 4, it is characterised in that：The step Suddenly in (5)：Replace short transmission line with high-frequency microwave circuit board, obtain capacitive character metal patch layer, impedance matching medium flaggy and The random surface structure that inductive metal patch layer is formed；Dielectric-slab and metal patch layer closely connect during processing, using covering copper Foil laminate technology presses.
- 8. the design method of the stealthy random surface of ultra wide band complete polarization according to claim 4, it is characterised in that：The step Suddenly in (5)：Metal patch is from silver or copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710541953.2A CN107565223A (en) | 2017-07-05 | 2017-07-05 | A kind of stealthy random surface of ultra wide band complete polarization and its design method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710541953.2A CN107565223A (en) | 2017-07-05 | 2017-07-05 | A kind of stealthy random surface of ultra wide band complete polarization and its design method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107565223A true CN107565223A (en) | 2018-01-09 |
Family
ID=60972670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710541953.2A Pending CN107565223A (en) | 2017-07-05 | 2017-07-05 | A kind of stealthy random surface of ultra wide band complete polarization and its design method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107565223A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108879108A (en) * | 2018-07-06 | 2018-11-23 | 电子科技大学 | A kind of restructural phased array antenna RCS reduction method that polarized based on scattering |
| CN109687161A (en) * | 2018-12-29 | 2019-04-26 | 电子科技大学 | A kind of rotary-type broadband ultra wide band transmissive arrays antenna of low RCS polarization |
| CN112952405A (en) * | 2021-01-27 | 2021-06-11 | 中国传媒大学 | Research method of ultra-wideband fully-polarized electric scanning array technology |
| CN113506992A (en) * | 2021-05-31 | 2021-10-15 | 中国人民解放军空军工程大学 | Concave-convex curved carpet stealth coat and design method thereof |
| CN113745841A (en) * | 2021-07-29 | 2021-12-03 | 中国人民解放军92728部队 | Conformal electromagnetic stealth super surface and design method thereof |
| CN113871884A (en) * | 2021-08-16 | 2021-12-31 | 西安电子科技大学 | Random phase gradient multi-polarization independent wide-angle RCS (radar cross section) reduced super surface |
| CN115241653A (en) * | 2022-07-27 | 2022-10-25 | 中国船舶重工集团公司第七二四研究所 | Reflection-type ultra-wideband low-RCS phase gradient super-surface |
| JP7385000B2 (en) | 2019-08-06 | 2023-11-21 | 広州方邦電子股▲ふん▼有限公司 | Scattering films and electronic devices containing scattering films |
| CN117559141A (en) * | 2023-11-01 | 2024-02-13 | 广东技术师范大学 | Transparent broadband metamaterial wave absorber based on topological optimization and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006098587A1 (en) * | 2005-03-15 | 2006-09-21 | Electronics And Telecommunications Research Institute | Freuqency selective surface for the filtering of freuqency band and design method thereof |
| CN102299697A (en) * | 2011-05-31 | 2011-12-28 | 许河秀 | Composite right/left handed transmission line and design method thereof as well as duplexer based on transmission line |
| CN103178352A (en) * | 2013-03-05 | 2013-06-26 | 电子科技大学 | Multi-frequency single negative-permittivity metamaterial and preparation method thereof |
| CN103582399A (en) * | 2012-08-03 | 2014-02-12 | 深圳光启创新技术有限公司 | Broadband wave-absorbing metamaterial |
| CN204011735U (en) * | 2014-02-24 | 2014-12-10 | 东南大学 | Individual layer broadband random surface |
| US9431709B2 (en) * | 2012-04-03 | 2016-08-30 | Wemtec, Inc. | Artificial magnetic conductor antennas with shielded feedlines |
-
2017
- 2017-07-05 CN CN201710541953.2A patent/CN107565223A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006098587A1 (en) * | 2005-03-15 | 2006-09-21 | Electronics And Telecommunications Research Institute | Freuqency selective surface for the filtering of freuqency band and design method thereof |
| CN102299697A (en) * | 2011-05-31 | 2011-12-28 | 许河秀 | Composite right/left handed transmission line and design method thereof as well as duplexer based on transmission line |
| US9431709B2 (en) * | 2012-04-03 | 2016-08-30 | Wemtec, Inc. | Artificial magnetic conductor antennas with shielded feedlines |
| CN103582399A (en) * | 2012-08-03 | 2014-02-12 | 深圳光启创新技术有限公司 | Broadband wave-absorbing metamaterial |
| CN103178352A (en) * | 2013-03-05 | 2013-06-26 | 电子科技大学 | Multi-frequency single negative-permittivity metamaterial and preparation method thereof |
| CN204011735U (en) * | 2014-02-24 | 2014-12-10 | 东南大学 | Individual layer broadband random surface |
Non-Patent Citations (2)
| Title |
|---|
| JIE CHEN ET AL.: "Reduction of Radar Cross Section Based on a Metasurface", 《PROGRESS IN ELECTROMAGNETICS RESEARCH》 * |
| 周禹龙等: "双频频率选择表面及其在微带天线宽带RCS 减缩中的应用", 《电 子 与 信 息 学 报》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108879108A (en) * | 2018-07-06 | 2018-11-23 | 电子科技大学 | A kind of restructural phased array antenna RCS reduction method that polarized based on scattering |
| CN109687161A (en) * | 2018-12-29 | 2019-04-26 | 电子科技大学 | A kind of rotary-type broadband ultra wide band transmissive arrays antenna of low RCS polarization |
| JP7385000B2 (en) | 2019-08-06 | 2023-11-21 | 広州方邦電子股▲ふん▼有限公司 | Scattering films and electronic devices containing scattering films |
| CN112952405A (en) * | 2021-01-27 | 2021-06-11 | 中国传媒大学 | Research method of ultra-wideband fully-polarized electric scanning array technology |
| CN112952405B (en) * | 2021-01-27 | 2022-11-18 | 中国传媒大学 | Research method of ultra-wideband fully-polarized electric scanning array technology |
| CN113506992A (en) * | 2021-05-31 | 2021-10-15 | 中国人民解放军空军工程大学 | Concave-convex curved carpet stealth coat and design method thereof |
| CN113506992B (en) * | 2021-05-31 | 2022-07-22 | 中国人民解放军空军工程大学 | Concave-convex curved carpet camouflage and design method thereof |
| CN113745841A (en) * | 2021-07-29 | 2021-12-03 | 中国人民解放军92728部队 | Conformal electromagnetic stealth super surface and design method thereof |
| CN113745841B (en) * | 2021-07-29 | 2023-08-29 | 中国人民解放军92728部队 | Conformal electromagnetic stealth subsurface and design method thereof |
| CN113871884A (en) * | 2021-08-16 | 2021-12-31 | 西安电子科技大学 | Random phase gradient multi-polarization independent wide-angle RCS (radar cross section) reduced super surface |
| CN115241653A (en) * | 2022-07-27 | 2022-10-25 | 中国船舶重工集团公司第七二四研究所 | Reflection-type ultra-wideband low-RCS phase gradient super-surface |
| CN117559141A (en) * | 2023-11-01 | 2024-02-13 | 广东技术师范大学 | Transparent broadband metamaterial wave absorber based on topological optimization and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107565223A (en) | A kind of stealthy random surface of ultra wide band complete polarization and its design method | |
| CN104993249B (en) | Single-pass band bilateral inhales ripple and is combined Meta Materials and its antenna house and antenna system | |
| CN102176543B (en) | Cross spiral frequency selective surface (FSS) structure with dual band characteristics and construction method thereof | |
| CN107394410A (en) | The dimension of one kind 2.5 closes ring-like frequency-selective surfaces structure and its design method | |
| Pourzadi et al. | A directivity-enhanced directional coupler using epsilon negative transmission line | |
| Li et al. | A novel FSS structure with high selectivity and excellent angular stability for 5G communication radome | |
| Alibakhshi | Introducing the new wideband small plate antennas with engraved voids to form new geometries based on CRLH MTM-TLs for wireless applications | |
| Lin et al. | Design and analysis of super-wide bandpass filters using a novel compact meta-structure | |
| Yu et al. | Miniaturized wide-angle rasorber with a wide interabsorption high transparent bandpass based on multiple 2.5-D resonators | |
| CN102811595B (en) | Broadband wave-absorbing material | |
| CN102637958A (en) | Composite left-right-hand transmission line type narrow band wide-range frequency scan antenna | |
| CA2936482C (en) | Metamaterial electromagnetic bandgap structures | |
| CN207052765U (en) | The dimension of one kind 2.5 closes ring-like frequency-selective surfaces structure | |
| Yang et al. | Compact effective surface plasmon polariton frequency splitter based on substrate integrated waveguide | |
| CN206962014U (en) | A kind of mimo antenna based on the decoupling of artificial electromagnetic Meta Materials | |
| CN106876975A (en) | A kind of individual layer double frequency assembled unit and the frequency-selective surfaces containing the unit | |
| CN107681252A (en) | A kind of method that Compact high-gain antenna is made using sub-wavelength period disresonance structure coating | |
| CN114122743B (en) | Wave absorbing/transmitting device with miniaturized units | |
| Zeng | Compact electromagnetic band-gap structures (EBG) and its applications in antenna systems | |
| CN211404744U (en) | Strong coupling frequency selection surface structure insensitive to incident electromagnetic wave full angle | |
| Sudhendra et al. | FSS radomes for antenna RCS reduction | |
| CN108808257A (en) | The controllable super surface of refractive index | |
| Kamiya et al. | Study of EBG structures using Metamaterial Technology | |
| Mollah et al. | Investigation of novel tapered hybrid defected ground structure (DGS) | |
| Yelizarov et al. | Simulation of a Frequency Selective Surface with Fractal Jerusalem Cross Unit Cells |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180109 |