CN111355034A - Double-passband wave-transmitting structure with wave absorbing function - Google Patents
Double-passband wave-transmitting structure with wave absorbing function Download PDFInfo
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- CN111355034A CN111355034A CN202010195231.8A CN202010195231A CN111355034A CN 111355034 A CN111355034 A CN 111355034A CN 202010195231 A CN202010195231 A CN 202010195231A CN 111355034 A CN111355034 A CN 111355034A
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- 239000010410 layer Substances 0.000 claims abstract description 123
- 239000006260 foam Substances 0.000 claims abstract description 12
- 239000002344 surface layer Substances 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims description 11
- 230000009977 dual effect Effects 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims 1
- 238000009413 insulation Methods 0.000 claims 1
- 230000005428 wave function Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000012937 correction Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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
- H01Q15/0026—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 said selective devices having a stacked geometry or having multiple layers
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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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- Aerials With Secondary Devices (AREA)
Abstract
The invention relates to a dual-passband wave-transmitting structure with a wave-absorbing function, which comprises a skin layer, a foam layer, a loss layer and an FSS layer, wherein the skin layer, the loss layer, the skin layer, the foam layer, the skin layer, a frequency selection surface layer and the skin layer are sequentially arranged from top to bottom, and are bonded together.
Description
Technical Field
The invention relates to the technical field of radar wave transmission, in particular to a dual-passband wave transmission structure with a wave absorbing function.
Background
On various weaponry equipped with radar sensor, all improve radar system's low detectability through the antenna house that constitutes by special radar wave-transparent structure. Traditional radar wave-transparent structure does not possess low detectability, and traditional radar wave-absorbing structure is though having obvious effect to the low detectability improvement of radar, but traditional radar wave-absorbing structure is unsuitable to be applied to the antenna house.
The traditional radar wave-absorbing structure mainly comprises impedance layers and metal substrates which are arranged at intervals of dielectric layers, and the Salisbury screen mainly comprises a single-layer impedance layer at present, so that the wave-absorbing characteristic can be realized only at a single resonance frequency point; the Jaumann wave-absorbing structure formed by the multiple impedance layers can realize the wave-absorbing characteristics of multiple resonance frequency points through the superposition of the impedance layers, and the wave-absorbing bandwidth is expanded; the wave-absorbing structure formed by the impedance film etched with the units or the circuit layer loaded with the lumped elements can have broadband radar wave-absorbing characteristics in a thinner structure thickness. However, the substrate of the radar wave-absorbing structure is completely covered by the metal layer, and due to the existence of the metal layer, the wave-absorbing structure is not suitable for being used as a structure of an antenna housing.
The current Ku and Ka dual-passband wave-transmitting structure is realized by applying a Frequency Selective Surface (FSS) technology, namely the structure is formed by metal unit array films with medium layers at intervals, so that the characteristics of transmitting waves at the radar working waveband and reflecting electromagnetic waves of other wavebands can be obtained, the out-of-band low detectable characteristic is obtained by shape design, and the structure forming the radome has no wave absorption characteristic. Due to the influence of factors such as aerodynamic shape, the low detectivity performance of the antenna housing is insufficient.
Therefore, in order to overcome the above disadvantages, a dual-passband wave-transmitting structure with a wave-absorbing function is required to be provided.
Disclosure of Invention
Technical problem to be solved
The invention aims to solve the technical problem that the existing radar wave-absorbing structure is not suitable for the antenna housing and the FSS antenna housing with wave-transmitting Ku and Ka frequency bands and has insufficient low detectability.
(II) technical scheme
In order to solve the technical problem, the invention provides a dual-passband wave-transmitting structure with a wave-absorbing function, which comprises a skin layer, a foam layer, a loss layer and an FSS layer, wherein the skin layer, the loss layer, the skin layer, the foam layer, the skin layer, a frequency selection surface layer and the skin layer are sequentially arranged from top to bottom, and the layers are bonded together.
As a further explanation of the present invention, it is preferable that the loss layer is constituted by basic units of loss layers arranged alternately and periodically in a two-dimensional plane, and strong absorption performance for electromagnetic waves with an external band is realized by close arrangement of the units of loss layers.
As a further description of the present invention, preferably, the loss layer basic unit is a three-pole metal patch welded with a resistor, a line width of each dipole in the three-pole metal patch is W1, a side length is W2, an included angle between the dipole and the three-pole metal patch is 120 °, a resistance value of the resistor is r, a value range of W1 is 0.1-0.2 mm, a value range of W2 is 5-10 mm, and a value range of r is 200-300 Ω, so that miniaturization of the structure is achieved, and a wave absorbing function is achieved in a low frequency band.
As a further description of the present invention, preferably, two loss layer basic units are spliced together to form a loss layer array unit with R1 as a center distance, wherein the value range of R1 is 5-10 mm.
As a further description of the present invention, it is preferable that the lossy layer array unit has a vertical arrangement period of D1 and a horizontal arrangement period of D2 to form a lossy layer array, where D1 has a value range of 10-15 mm and D2 has a value range of 15-20 mm.
As a further explanation of the present invention, it is preferable that the FSS layer is formed of basic units of FSS layers arranged alternately and periodically in a two-dimensional plane, and the interaction of electromagnetic waves shows the properties of transmitting waves in Ku and Ka bands and reflecting electromagnetic waves in low frequency bands.
As a further description of the present invention, preferably, two FSS layer basic units are spliced together to form an FSS layer array unit with R2 as a center distance, wherein the value range of R2 is 5-10 mm.
As a further description of the present invention, it is preferable that the FSS layer array unit forms the FSS layer array with a vertical arrangement period of D3 and a horizontal arrangement period of D4, wherein D3 has a value ranging from 5 to 10mm, and D4 has a value ranging from 10 to 15 mm.
(III) advantageous effects
The technical scheme of the invention has the following advantages:
according to the invention, the wave-transmitting FSS layer in Ku and Ka frequency bands and the FSS layer reflected in other frequency bands are organically combined with the loss layer with wave-absorbing characteristics in other frequency bands in a frequency domain, so that the dual functions of low-frequency band wave-absorbing and Ku and Ka frequency band wave-transmitting can be realized simultaneously, out-of-band wave-absorbing is realized on the Ku and Ka band wave-transmitting structure, the normal work of a Ku and Ka band radar system is ensured, the out-of-band radar scattering cross section is reduced, and out-of-band scattering is inhibited. Meanwhile, the wave-transmitting structure comprises multiple layers of glass fiber reinforced plastic material layers, and is suitable for high-strength working environments.
Drawings
FIG. 1 is a cross-sectional structural view of a dual passband wave-transmitting structure of the present invention;
FIG. 2 is a diagram of the basic cell structure of the lossy layer of the present invention;
FIG. 3 is a block diagram of a lossy layer array element of the invention;
FIG. 4 is a diagram of a lossy layer array structure of the present invention;
FIG. 5 is a diagram of the basic unit structure of the FSS layer of the present invention;
FIG. 6 is a diagram of an FSS layer array element structure of the present invention;
FIG. 7 is a diagram of an FSS layer array architecture of the present invention;
fig. 8 is a schematic diagram of the wave-transmitting/reflecting performance of the dual-passband wave-transmitting structure of the present invention.
In the figure: 1. a skin layer; 2. a foam layer; 3. a lossy layer; 31. a lossy layer basic cell; 32. a lossy layer array unit; 33. an array of lossy layers; 4. an FSS layer; 41. an FSS layer basic unit; 42. an FSS layer array unit; 43. an FSS layer array; 5. a metal unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The utility model provides a bi-pass band wave-transparent structure with inhale ripples function, as shown in figure 1, including skin layer 1, foam blanket 2, loss layer 3 and frequency selection superficial layer 4, radar wave-absorbing structure is multilayer structure, down is skin layer 1, loss layer 3, skin layer 1, foam blanket 2, skin layer 1, frequency selection superficial layer 4 and skin layer 1 from the last in proper order, bonds between each layer and is in the same place.
Referring to fig. 1 to 4, the skin layer 1 is a glass fiber material. The foam layer 2 is made of foam plate materials, the loss layer 3 is made of loss layer basic units 31 which are arranged in a two-dimensional plane in a crossed periodic repeated mode, the two loss layer basic units 31 are spliced together by taking R1 as a center distance to form a loss layer array unit 32, and the value range of R1 is 5-10 mm; the loss layer array unit 32 forms a loss layer array 33 with a vertical arrangement period of D1 and a horizontal arrangement period of D2, wherein the value range of D1 is 10-15 mm, and the value range of D2 is 15-20 mm. The loss layer basic unit 31 is welded with a three-pole metal patch of the resistor device 5, the line width of each dipole in the three-pole metal patch is W1, the side length is W2, the mutual included angle is 120 degrees, the resistance value of the resistor device 5 is r, the value range of W1 is 0.1-0.2 mm, the value range of W2 is 5-10 mm, and the value range of r is 200-300 omega, and through the size setting, the structure can be miniaturized, and the wave absorbing function can be realized in a specific frequency band; through the arrangement, the loss layer 3 becomes a resistance type frequency selection surface, and the parameters of the loading resistor of the layer are changed, so that the wave absorbing characteristic of a specific frequency band can be influenced.
With reference to fig. 5 to 7, the frequency selective surface layer 4 is formed by FSS layer basic units 41 arranged in a two-dimensional plane in a crossed periodic and repeated manner, and two FSS layer basic units 41 are spliced together to form an FSS layer array unit 42 by taking R2 as a center distance, wherein the value range of R2 is 5 to 10 mm; the FSS layer array unit 42 forms an FSS layer array 43 with the arrangement period in the vertical direction being D3 and the arrangement period in the horizontal direction being D4, wherein the value range of D3 is 5-10 mm, and the value range of D4 is 10-15 mm; the FSS basic unit 41 is an internal and external nested regular hexagon, the side length of the external hexagon is L1, the side length of the internal hexagon is L2, the value range of L1 is 2-3 mm, and the value range of L2 is 1-2 mm; small fractal hexagons are arranged at the hexagonal ends of the FSS basic unit 41, the side length of each small fractal hexagon is L3, and the value range of L3 is 0.3-0.6 mm; hexagonal annular gaps are formed in the outer hexagon, the inner hexagon and the small fractal hexagon of the FSS basic unit 41, the gap widths of the outer hexagon and the small fractal hexagonal annular gaps are W3, the gap width of the inner hexagonal annular gap is W4, and the value ranges of W3 and W4 are 0.1-0.3 mm.
With reference to fig. 1 and 8, when the wave-transparent structure of the present invention is used, electromagnetic wave signals with various frequencies enter from the outer side of the uppermost skin layer 1, sequentially pass through the wave-absorbing structure formed by combining the skin layer 1 and the loss layer 3, the skin layer 1, the foam layer 2, and the frequency-filtering structure formed by combining the skin layer 1 and the frequency-selective surface layer 4. The wave absorbing structure formed by combining the skin layer 1 and the loss layer 3 absorbs electromagnetic wave signals reflected by the frequency selective surface, the frequency selective structure performs frequency selective filtering on the incident electromagnetic wave signals, reflects the electromagnetic wave signals outside Ku and Ka frequency bands, selects the electromagnetic waves of the Ku and Ka frequency bands to pass through, and finally realizes that only the electromagnetic wave signals of the Ku and Ka frequency bands are output by the lowest skin layer 1 through creative structural design and hundreds of experimental corrections.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The utility model provides a bi-pass band wave-transparent structure with inhale wave function which characterized in that: the self-insulation composite material comprises a skin layer (1), a foam layer (2), a loss layer (3) and an FSS layer (4), wherein the skin layer (1), the loss layer (3), the skin layer (1), the foam layer (2), the skin layer (1), a frequency selection surface layer (4) and the skin layer (1) are sequentially arranged from top to bottom, and the layers are bonded together.
2. The dual passband wave-transmitting structure with the wave absorbing function of claim 1, wherein: the loss layer (3) is formed of loss layer basic units (31) which are repeatedly arranged in a two-dimensional plane with a cross period.
3. The dual passband wave-transmitting structure with the wave absorbing function of claim 2, wherein: the loss layer basic unit (31) is a tripolar metal patch welded with a resistor device (5), the line width of each dipole in the tripolar patch is W1, the side length is W2, the mutual included angle is 120 degrees, the resistance value of the resistor device (5) is r, the value range of W1 is 0.1-0.2 mm, the value range of W2 is 5-10 mm, and the value range of r is 200-300 omega.
4. The dual passband wave-transmitting structure with the wave absorbing function of claim 3, wherein: the two loss layer basic units (31) are spliced together to form a loss layer array unit (32) by taking R1 as a center distance, wherein the value range of R1 is 5-10 mm.
5. The dual passband wave-transmitting structure with the wave absorbing function of claim 4, wherein: the loss layer array unit (32) forms a loss layer array (33) with the arrangement period in the vertical direction being D1 and the arrangement period in the horizontal direction being D2, wherein the value range of D1 is 10-15 mm, and the value range of D2 is 15-20 mm.
6. The dual passband wave-transmitting structure with the wave absorbing function of claim 1, wherein: the FSS layer (4) is formed of FSS layer basic units (41) which are alternately and periodically arranged in a two-dimensional plane.
7. The dual passband wave-transmitting structure with the wave absorbing function of claim 6, wherein: the two FSS layer basic units (41) are spliced together by taking R2 as a center distance to form an FSS layer array unit (42), wherein the value range of R2 is 5-10 mm.
8. The dual passband wave-transmitting structure with the wave absorbing function of claim 7, wherein: the FSS layer array unit (42) forms an FSS layer array (43) with the arrangement period in the vertical direction being D3 and the arrangement period in the horizontal direction being D4, wherein the value range of D3 is 5-10 mm, and the value range of D4 is 10-15 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010195231.8A CN111355034B (en) | 2020-03-19 | 2020-03-19 | Dual-passband wave-transmitting structure with wave absorbing function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010195231.8A CN111355034B (en) | 2020-03-19 | 2020-03-19 | Dual-passband wave-transmitting structure with wave absorbing function |
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| CN111355034A true CN111355034A (en) | 2020-06-30 |
| CN111355034B CN111355034B (en) | 2022-05-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112350066A (en) * | 2020-10-28 | 2021-02-09 | 北京环境特性研究所 | Filtering structure and radome |
| CN113087541A (en) * | 2021-03-19 | 2021-07-09 | 西安交通大学 | Wave-transparent/wave-absorbing composite layered aerogel and preparation method and application thereof |
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| CN107946763A (en) * | 2017-12-26 | 2018-04-20 | 航天科工武汉磁电有限责任公司 | One kind inhales ripple wave transparent integration metamaterial antenna cover and its application |
| CN110416738A (en) * | 2019-08-05 | 2019-11-05 | 深圳光启尖端技术有限责任公司 | A wave-absorbing metamaterial structure and aircraft |
| CN110729567A (en) * | 2019-10-24 | 2020-01-24 | 北京环境特性研究所 | Wave absorbing device with controllable X-waveband pass band |
-
2020
- 2020-03-19 CN CN202010195231.8A patent/CN111355034B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107946763A (en) * | 2017-12-26 | 2018-04-20 | 航天科工武汉磁电有限责任公司 | One kind inhales ripple wave transparent integration metamaterial antenna cover and its application |
| CN110416738A (en) * | 2019-08-05 | 2019-11-05 | 深圳光启尖端技术有限责任公司 | A wave-absorbing metamaterial structure and aircraft |
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Non-Patent Citations (1)
| Title |
|---|
| LAN LU等: "A Novel Dual Bandpass Frequency Selective Surface", 《2019 INTERNATIONAL APPLIED COMPUTATIONAL ELECTROMAGNETICS SOCIETY SYMPOSIUM - CHINA (ACES)》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112350066A (en) * | 2020-10-28 | 2021-02-09 | 北京环境特性研究所 | Filtering structure and radome |
| CN112350066B (en) * | 2020-10-28 | 2023-05-16 | 北京环境特性研究所 | Filtering structure and radar antenna housing |
| CN113087541A (en) * | 2021-03-19 | 2021-07-09 | 西安交通大学 | Wave-transparent/wave-absorbing composite layered aerogel and preparation method and application thereof |
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| CN111355034B (en) | 2022-05-24 |
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