CN110768020A - Frequency selective surface structure - Google Patents
Frequency selective surface structure Download PDFInfo
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- CN110768020A CN110768020A CN201810832697.7A CN201810832697A CN110768020A CN 110768020 A CN110768020 A CN 110768020A CN 201810832697 A CN201810832697 A CN 201810832697A CN 110768020 A CN110768020 A CN 110768020A
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- frequency selective
- surface structure
- selective surface
- layer
- groove
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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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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
Abstract
The invention discloses a frequency selective surface structure which comprises a supporting layer and a conducting layer, wherein a pattern groove is formed in the surface of one side of the supporting layer, the groove is of a hollow net structure, and the conducting layer is arranged in the pattern groove. Through the structure, the technical problem that the frequency selective surface structure is difficult to be curved in a three-dimensional mode is solved.
Description
Technical Field
The invention relates to the technical field of electromagnetic fields and microwaves, in particular to a frequency selective surface structure.
Background
Frequency Selective Surface (FSS) is widely used in Frequency Selective Surface structures in the microwave and infrared bands, and can be used as filters, radomes, reflective antennas, stealth materials, etc., and as early as the sixty years of the last century, research on Frequency Selective Surface (FSS) has been carried out abroad, and a systematic research theory is available at present. The research on FSS is relatively late in the country and has developed very rapidly in recent years due to the wide field of application of FSS, particularly satellite communications and radar systems, and the potential commercial value. The theory and application of FSS become a development direction in the technical field of microwave and millimeter wave. However, the analysis research on the FSS in China still has a great gap with the foreign countries, and is limited to a few special structural units, and the electromagnetic response characteristic research on a special-shaped structure or a multi-layer conducting layer frequency selection surface structure is rare.
The Frequency Selective Surface (FSS) is a single-screen or multi-screen periodic array structure composed of a large number of passive resonance units, and is composed of periodically arranged metal patch units or periodically arranged aperture units on a metal screen. The frequency selectivity of the filter is derived from the interaction between the periodic structure and the electromagnetic wave, and the filter is a spatial filter which has selective action on the incident angle, the polarization mode and the frequency of the electromagnetic wave. Such surfaces may exhibit total reflection (patch-type metal structure elements) or total transmission (aperture-type metal structure elements) around the resonant frequency of the element. The interaction of FSS and electromagnetic wave shows obvious filtering characteristics of band stop (patch type metal structure unit) or band pass (aperture type metal structure unit). The FSS can filter the frequency of the electromagnetic wave. The response characteristic of the FSS to electromagnetic waves changes with frequency, and the central operating frequency and the bandwidth of the FSS with the same unit structure change under the influence of the magnetic permeability of metal. The incident electromagnetic wave of the band-stop FSS in the central frequency band exhibits a reflection characteristic, while the incident electromagnetic wave of the other frequency bands exhibits a transmission characteristic.
However, the patch type metal structure unit adopts the technical problems that the metal structure unit is convexly attached to the outer surface of the supporting layer, so that the thickness of the patch type metal structure unit is thicker than that of the embedded type metal structure unit, the FSS flexibility is poor, the overall light transmittance is low, the three-dimensional curved surface difficulty is high, the design difficulty is high, and the manufacturing process is complex.
Disclosure of Invention
The invention mainly aims to provide a frequency selective surface structure which is easy to three-dimensionally curve.
In order to achieve the above object, the present invention provides a frequency selective surface structure, which includes a supporting layer and a conductive layer, wherein a pattern groove is formed on a surface of one side of the supporting layer, the groove is a hollow-out mesh structure, and the conductive layer is disposed in the pattern groove.
In one embodiment, the conductive layer includes at least one conductive element.
In one embodiment, the conductive unit is made of metal or graphene.
In one embodiment, the pattern groove includes at least one groove unit.
In one embodiment, the plurality of groove units are arranged periodically or non-periodically.
In one embodiment, there is no space between a plurality of the groove units, or there is a space in at least one direction.
In one embodiment, the groove units are hollow cross-shaped net structures.
In one embodiment, the support layer is made of a flexible polymer organic compound.
In one embodiment, the frequency selective surface structure further comprises a cover layer at least partially covering the conductive layer or/and the cover layer at least partially covering the support layer.
In one embodiment, the cover layer is made of a flexible polymer organic compound.
The embodiment of the invention provides a frequency selective surface structure, wherein a conducting layer is embedded into a pattern groove of a hollowed-out net-shaped mechanism on the surface of a supporting layer to form a conducting layer unit layer, so that the thickness of the whole frequency selective surface structure can be designed to be smaller, the use of materials is reduced, the light transmittance is increased, the ultrathin frequency selective surface structure is realized, and the technical problem that the three-dimensional curved surface of the frequency selective surface structure is difficult is solved.
Drawings
FIG. 1 is a schematic structural diagram of a supporting layer according to an embodiment of the present invention;
FIG. 2 is a schematic view of a supporting layer and a conductive layer structure according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a frequency selective surface structure according to an embodiment of the present invention;
FIG. 4 is a wave-transparent characteristic curve of a band-stop frequency band of a frequency selective surface structure of a millimeter-scale metal structure unit in a microwave region according to an embodiment of the present invention;
FIG. 5 is a wave-transparent characteristic curve of a band-stop frequency band of a frequency selective surface structure of a micron-sized metal structure unit in an infrared wave region according to an embodiment of the present invention;
FIG. 6 is a layout diagram of a frequency selective surface according to an embodiment of the present invention.
Detailed Description
To further illustrate the technical solutions and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the present invention will be made with reference to the accompanying drawings and examples.
Referring to fig. 1 to 3, an embodiment of the invention discloses a frequency selective surface structure, which includes a supporting layer 1 and a conductive layer 2, wherein a pattern groove 11 is formed on a surface of one side of the supporting layer 1, the pattern groove is a hollow mesh structure, and the conductive layer is disposed in the pattern groove 11.
In this embodiment, the frequency selective surface structure is a band stop type frequency selective surface structure.
The support layer 2 is made of a flexible transparent high molecular organic compound (such as polymethacrylate or polyethylene terephthalate), has good flexibility and light transmittance, and can be attached to any curved surface.
The pattern groove comprises at least one groove unit 11, and in the same frequency selection surface structure, a plurality of groove units 11 are not spaced or are spaced in at least one direction; the plurality of groove units 11 are arranged periodically or non-periodically, preferably in an array or a honeycomb. In this embodiment, the groove units 11 are in a hollow cross-shaped mesh structure, and are manufactured on the support layer 1 by an imprinting method. The number of the groove units 11 is determined according to the requirement, such as the size of the support layer 1 or the frequency of the stop band, and may be one or more, and the shape of the pattern of the groove units 11 is designed according to different stop band frequencies.
The conductive layer 2 comprises at least one conductive element, which is a metallic structural element. One or more metal structural units constitute the metal structural unit layer 2, and in particular, the metal structural units may be copper structural units. The metal structure units are formed by embedding molten metal into the groove units 11 in a filling mode, and the surfaces of the metal structure units are flush with the surface of the support layer 1. Thus, the pattern of the metal structure unit corresponds to the groove unit 11.
The conducting layer 2 with the hollow cross-shaped patterns has a low duty ratio, the use of materials is reduced, the light transmittance is improved, and meanwhile, the extremely thin conducting layer 2 has certain flexibility. The manufactured frequency selection surface structure has excellent flexibility, so that the frequency selection surface structure is not influenced by the appearance of an attaching body in the attaching process, the frequency selection surface structure of the structure has high optical transmittance, does not influence the normal view of an attaching surface, can be used as a high-transparency optical window with specific observing and detecting functions, and is simple and easy to implement.
The frequency selective characteristics of the band-stop type frequency selective surface structures of different frequency bands are realized by the characteristics of the conductive units (the patterns, line widths, thicknesses and materials of the conductive units). In this embodiment, the conductive unit layers are arranged in a rectangular array, and the conductive units are made of copper. As shown in fig. 2, 4 and 6, when the thickness of the support layer 1 is 0.1mm, the cross width S1 of the copper structural units (the hollowed cross-shaped mesh structure) is 0.44mm, the length S2 of the cross is 3mm, the line width S6 of the grid lines of the cross is 0.04mm, the thickness is 0.05mm, the space S5 between the grid lines is 0.1mm, the space S4 of the longitudinally adjacent copper structural units is 0.2mm, and the space S3 of the transversely adjacent copper structural units is 0.2mm, the copper structural units are in millimeter level, the frequency band of the frequency selective surface structure of the millimeter copper structural units is in the microwave region, the transmittance at the edge of the channel is steeply reduced, the transmission coefficient is rapidly reduced to-53 dB, and the band rejection performance of the band in the wider band (43.8GHz-46.6GHz) is kept below-20 dB, and the band rejection performance is good. As shown in fig. 2, 5 and 6, when the thickness of the support layer 1 is 30um, the cross width S1 of the copper structural units (hollow cross-shaped mesh structure) is 44um, the cross line length S2 is 300um, the line width S6 of the grid lines of the cross is 4um, the thickness is 15um, the spacing S5 between the grid lines is 10um, the spacing S4 of the longitudinally adjacent copper structural units is 20um, and the spacing S3 of the transversely adjacent copper structural units is 20um, the band rejection frequency band of the frequency selective surface structure of the copper structural units, which is micron-sized copper structural units, is in the infrared wave region, the transmittance at the edge of the channel is abruptly reduced, the reflectance is abruptly increased, the transmission coefficient is rapidly reduced to-47 dB, and the transmission coefficient is kept below-20 dB in a wider frequency band (420GHz-455GHz), so that the suppression performance is good. As can be seen from the above, as the size of the copper structural unit increases, the stopband shifts from the infrared band to the microwave band.
In other embodiments, the conductive layer 2 may also be formed by embedding graphene into the pattern groove, and the graphene has high transparency and is thin, so that the excellent electro-optic effect of the graphene enables the frequency selective surface structure to have high transparency and better flexibility.
The conductive layer 2 is provided with a covering layer 3, and the covering layer 3 can at least partially cover the conductive layer 2 or/and the covering layer 3 at least partially covers the support layer 1 in a fitting manner. In this embodiment, the covering layer 3 is made of a flexible transparent polymer organic compound (such as polymethacrylate or polyethylene terephthalate), and the covering layer 3 is used as a protective layer of the conductive layer 2 to cover the surface of the entire frequency selective surface structure, so as to protect the conductive layer 2 from being corroded by the external environment, thereby increasing the service life and stability of the frequency selective surface structure, and simultaneously enabling the conductive layer 2 to be more tightly attached to the supporting layer 1, and enhancing the adhesion between the conductive layer 2 and the supporting structure.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The frequency selective surface structure is characterized by comprising a supporting layer and a conducting layer, wherein a pattern groove is formed in the surface of one side of the supporting layer, the groove is of a hollow-out net-shaped structure, and the conducting layer is arranged in the pattern groove.
2. The frequency selective surface structure of claim 1, wherein the conductive layer comprises at least one conductive element.
3. The frequency selective surface structure of claim 2, wherein the conductive element is made of metal or graphene.
4. The frequency selective surface structure of claim 1, wherein the patterned grooves comprise at least one groove element.
5. The frequency selective surface structure of claim 4, wherein the plurality of groove units are arranged periodically or non-periodically.
6. The frequency selective surface structure of claim 4, wherein a plurality of said groove elements are spaced apart, either in at least one direction or not.
7. The frequency selective surface structure of claim 4, wherein the groove units are hollowed-out cross-shaped mesh structures.
8. The frequency selective surface structure of claim 1, wherein the support layer is made of a flexible high molecular organic compound.
9. The frequency selective surface structure of claim 1, further comprising a cover layer at least partially covering the conductive layer or/and the cover layer at least partially covering the support layer.
10. The frequency selective surface structure of claim 9, wherein the cover layer is made of a flexible high molecular organic compound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810832697.7A CN110768020A (en) | 2018-07-26 | 2018-07-26 | Frequency selective surface structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810832697.7A CN110768020A (en) | 2018-07-26 | 2018-07-26 | Frequency selective surface structure |
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| CN110768020A true CN110768020A (en) | 2020-02-07 |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1620227A (en) * | 2003-10-01 | 2005-05-25 | 三星Techwin株式会社 | Method of manufacturing substrate for circuit board and smart label having the substrate |
| CN101222840A (en) * | 2008-02-04 | 2008-07-16 | 哈尔滨工业大学 | Electromagnetic shielding optical window with double-layer pane metal gridding structure |
| CN102723541A (en) * | 2012-06-14 | 2012-10-10 | 北京航空航天大学 | Method for optimizing cross-shaped annular slot frequency selection surface unit structural body and conformal antenna housing with low radar cross-section (RCS) |
| US20130207859A1 (en) * | 2010-04-30 | 2013-08-15 | Centre National De La Recherche Scientifique | Compact radiating element having resonant cavities |
| CN103491754A (en) * | 2013-08-30 | 2014-01-01 | 中国科学院长春光学精密机械与物理研究所 | High-performance radar/infrared dual-waveband band-pass frequency selective surface |
| CN104538710A (en) * | 2015-01-23 | 2015-04-22 | 东南大学 | Frequency selection surface structure |
| CN105206904A (en) * | 2015-09-25 | 2015-12-30 | 中国人民解放军空军工程大学 | Double-passband frequency selective surface based on high-dielectric low-loss all-dielectric metamaterial |
| CN106775043A (en) * | 2015-11-24 | 2017-05-31 | 南昌欧菲光科技有限公司 | Touch display unit, pressure sensitive unit and preparation method thereof |
| CN108134207A (en) * | 2017-12-18 | 2018-06-08 | 中国科学院长春光学精密机械与物理研究所 | The production method of conventional patch type curved surface frequency-selective surfaces array |
-
2018
- 2018-07-26 CN CN201810832697.7A patent/CN110768020A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1620227A (en) * | 2003-10-01 | 2005-05-25 | 三星Techwin株式会社 | Method of manufacturing substrate for circuit board and smart label having the substrate |
| CN101222840A (en) * | 2008-02-04 | 2008-07-16 | 哈尔滨工业大学 | Electromagnetic shielding optical window with double-layer pane metal gridding structure |
| US20130207859A1 (en) * | 2010-04-30 | 2013-08-15 | Centre National De La Recherche Scientifique | Compact radiating element having resonant cavities |
| CN102723541A (en) * | 2012-06-14 | 2012-10-10 | 北京航空航天大学 | Method for optimizing cross-shaped annular slot frequency selection surface unit structural body and conformal antenna housing with low radar cross-section (RCS) |
| CN103491754A (en) * | 2013-08-30 | 2014-01-01 | 中国科学院长春光学精密机械与物理研究所 | High-performance radar/infrared dual-waveband band-pass frequency selective surface |
| CN104538710A (en) * | 2015-01-23 | 2015-04-22 | 东南大学 | Frequency selection surface structure |
| CN105206904A (en) * | 2015-09-25 | 2015-12-30 | 中国人民解放军空军工程大学 | Double-passband frequency selective surface based on high-dielectric low-loss all-dielectric metamaterial |
| CN106775043A (en) * | 2015-11-24 | 2017-05-31 | 南昌欧菲光科技有限公司 | Touch display unit, pressure sensitive unit and preparation method thereof |
| CN108134207A (en) * | 2017-12-18 | 2018-06-08 | 中国科学院长春光学精密机械与物理研究所 | The production method of conventional patch type curved surface frequency-selective surfaces array |
Non-Patent Citations (3)
| Title |
|---|
| LETICIA ALONSO-GONZ´ALEZ: "Layer-to-Layer Angle Interlock 3D Woven Bandstop Frequency Selective Surface", 《PROGRESS IN ELECTROMAGNETICS RESEARCH》 * |
| S. N. AZEMI, K. GHORBANI: "3D Frequency Selective Surfaces with Wideband Response", 《THE 2014 INTERNATIONAL WORKSHOP ON ANTENNA TECHNOLOGY》 * |
| WAYNE S. T. ROWE: "3D Frequency Selective Surfaces with Highly Selective Reponses", 《2015 LOUGHBOROUGH ANTENNAS & PROPAGATION CONFERENCE (LAPC)》 * |
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Application publication date: 20200207 |