CN111048907A - Wave-absorbing and wave-transmitting integrated frequency selection surface with ultra-wide transparent wave band - Google Patents
Wave-absorbing and wave-transmitting integrated frequency selection surface with ultra-wide transparent wave band Download PDFInfo
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- CN111048907A CN111048907A CN202010029082.8A CN202010029082A CN111048907A CN 111048907 A CN111048907 A CN 111048907A CN 202010029082 A CN202010029082 A CN 202010029082A CN 111048907 A CN111048907 A CN 111048907A
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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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Abstract
The invention provides a wave-absorbing and wave-transmitting integrated frequency selection surface with an ultra-wide wave-transmitting band. The technical scheme is as follows: the FSS unit comprises FSS units which are arranged periodically, and each FSS unit is the same; each FSS cell comprises a three-layer structure, respectively: a first layer, a second layer, and a third layer. The first layer comprises a dielectric plate (1), a metal patch (2) is arranged in the center of the upper surface of the dielectric plate (1), the metal patch (2) is of an N-arm square spiral structure, metal strips (3) are uniformly distributed around the metal patch (2), and each metal strip (3) is connected with the metal patch (3) through a resistor (4); the second layer is an air interlayer (5); the third layer is a wave-transparent layer (6). The invention can realize the ultra-wideband, high transmittance and high angle stability wave-transmitting band, and can generate wave-absorbing characteristic outside the wave-transmitting band. In addition, the invention has simple structure and is easy to process.
Description
Technical Field
The invention belongs to the technical field of electromagnetic periodic structures, and relates to a design of a wave-absorbing and wave-transmitting integrated FSS (frequency selective Surface).
Background
FSS is an effective means for realizing the regulation and control of space electromagnetic waves. Have been widely used in radar and communication systems. The FSS with high transmittance can be used in the fields of antenna covers and the like, and the FSS with high reflectivity can be applied in the fields of electromagnetic protection, electromagnetic shielding and the like. Designing FSS with various characteristics is an important research and development direction in the microwave field.
FSS with ultra-wideband, high transmittance characteristics are commonly applied in stealth radome designs. By designing the FSS into a conical shape, a curved surface and the like and adopting a conformal mode with an antenna, the reduction of an antenna Radar RCS (Radar Cross Section) in a Radar and communication system can be effectively realized. The method has obvious stealth effect on the single-station radar. However, with the wide application of dual-station and multi-station radars, electromagnetic waves which are irradiated by the radars to the antenna housing and reflected to other directions can be received by the radar receiver positioned in the direction, and the RCS effect can be obviously enhanced in some directions, so that the stealth effect of the antenna housing is reduced or the antenna housing is invalid. One desirable solution to reduce dual-war/multi-station RCS is to design the FSS to be wave absorbing outside the FSS passband. Therefore, the concept of wave-absorbing and wave-transmitting integrated FSS is proposed, and attracts attention of a plurality of scholars in recent years.
In radar and communication systems, ultra-wideband generally refers to a relative bandwidth of greater than 20% or 25%. The wider operating bandwidth means a larger information capacity and a stronger interference resistance. Therefore, the wave-absorbing and wave-transmitting integrated FSS antenna housing is expected to have wider wave-transmitting bandwidth. Reference one (q.chen, d.sang, m.guo, and y.fu, "minor details frequency-Selective radar With a Wide Transmission Band Using circular spectral reactor," IEEE Transactions on Antennas and amplification, vol.67, pp.1045) discloses a wave-absorbing and wave-transmitting integrated FSS With an ultra-Wide Transmission Band, which operates at 8.3-11.07 GHz With an insertion loss of less than 1dB, an absolute bandwidth of 3.4GHz, and a relative bandwidth of 30.2%. Within the wave-transparent band, the oblique incidence angle is less than 30 degrees, and the wave-transparent band is relatively stable. In order to realize broadband wave transmission, the FSS adopts a double-layer circular spiral structure with single polarization characteristics to form regular hexagon layout and realize polarization insensitivity, the FSS can realize good broadband characteristics, but the design is complex, and the main upper layer resonance structure is in front-back two-side layout, so that the processing difficulty is high. Reference two (z.wang, j.fu, q.zeng, m.song, and t.a.denidni, "Wide-Band Transmissive Frequency-selective absorber," IEEE Antennas and Wireless transmission signatures, p.1-1) also discloses a wave-absorbing and wave-transmitting integrated FSS having an ultra-Wide transmission Band, where the transmission Band less than 1dB of insertion loss operates at 5.4-7.1GHz, the absolute bandwidth is 1.7GHz, and the relative bandwidth is 27.2%. Within the wave-transparent band, the oblique incidence angle has a relatively stable transparent band within 20 degrees. The upper layer resonance structure of the FSS is a single polarization resonance structure shaped like a dog bone, two orthogonal layouts are formed, polarization insensitivity is achieved, the FSS can achieve good ultra-wideband characteristics, but the angle stability is poor, and the passband characteristics fluctuate greatly along with the increase of an oblique incidence angle. In addition, the upper layer structure of the two FSS is relatively complex because a separate design which is insensitive to polarization is required.
Disclosure of Invention
The invention aims to provide a wave-absorbing and wave-transmitting integrated FSS (frequency selective surface system) with a transmission band with ultra-wide band, high transmittance and high angle stability.
The technical scheme of the invention is as follows: a wave-absorbing and wave-transmitting integrated frequency selection surface with an ultra-wide transmission band comprises FSS units which are periodically arranged, wherein each FSS unit is the same;
each FSS cell comprises a three-layer structure, respectively: a first layer, a second layer, and a third layer.
The first layer comprises a dielectric plate (1), a metal patch (2) is arranged in the center of the upper surface of the dielectric plate (1), the metal patch (2) is of an N-arm square spiral structure, metal strips (3) are uniformly distributed around the metal patch (2), and each metal strip (3) is connected with the metal patch (3) through a resistor (4); the second layer is an air interlayer (5); the third layer is a wave-transparent layer (6).
The invention has the following beneficial effects: the invention discloses a wave-absorbing and wave-transmitting integrated FSS (frequency selective surface system) with ultra-wide band, high transmittance and high-angle stability wave-transmitting band. Compared with the prior art, the invention has the advantages that the first layer is of a single-layer structure, so that the design and the processing are simpler. It is worth emphasizing that the four-arm square single-layer spiral resonant structure has polarization insensitive characteristic, so that the excellent polarization insensitive characteristic can be realized without additional polarization insensitive design. And the structure realizes a wider wave-transparent band.
Drawings
FIG. 1 is a schematic perspective view of a wave-absorbing and wave-transmitting integrated FSS provided by the present invention;
FIG. 2 is a perspective view of a unit structure of the wave-absorbing and wave-transmitting integrated FSS and a schematic structural diagram of a first layer;
FIG. 3 is a three-dimensional exploded view of a third layer of the wave-absorbing and wave-transmitting integrated FSS provided by the invention;
FIG. 4 is a wave-absorbing and wave-transmitting integrated FSS reflection/transmission curve and wave-absorbing rate curve provided by the present invention;
FIG. 5 is a performance curve of the wave-absorbing and wave-transmitting integrated FSS provided by the invention under the condition of oblique incidence of parallel polarized waves;
FIG. 6 is a performance curve of the wave-absorbing and wave-transmitting integrated FSS provided by the invention under the condition of oblique incidence of vertical polarized waves.
Detailed Description
The invention is further illustrated below with reference to the figures and tables.
The specific embodiment discloses a wave-absorbing and wave-transmitting integrated FSS (frequency shift system) with ultra-wideband, high transmittance and high-angle stability transmission bands, which is shown in figure 1 and comprises a three-dimensional structure schematic diagram of 3 units. In practical application, the number of units of the FSS provided by the invention is unlimited, and the number is determined according to requirements. Fig. 2 is a perspective view of a unit structure of the wave-absorbing and wave-transmitting integrated FSS and a schematic structural view of a first layer, which are provided by the invention, wherein the dielectric plate (1) is included, a metal patch (2) is arranged at the center of the upper surface of the dielectric plate, the metal patch (2) is in an N-arm square spiral structure (N is 4 shown in fig. 2), metal strips (3) are uniformly arranged around the metal patch (2), each metal strip (3) is connected with the metal patch (2) through a resistor (4), and the number of the metal strips (3) and the number of the resistors (4) are equal to N. Fig. 3 is a three-dimensional exploded view of a third layer of the wave-absorbing and wave-transmitting integrated FSS provided by the present invention, as shown in the figure, the third layer is a wave-transmitting layer, and includes a metal layer (7), a dielectric plate (8), a metal layer (9), a dielectric plate (10), and a metal layer (11) which are bonded together in sequence, and the structure is a known manner of an FSS with wave-transmitting characteristics, which can be referred to in document three (m.al-journal, n.behdad, "a New technology for Design of Low-Profile, Second-Order, band Frequency Selective surface," IEEE Transactions on Antennas & processing, vol.57, pp.452-459,2009). The polarization insensitive N-arm square spiral structure at the center of the first layer, namely the metal patch (2), is the core of the invention and is mainly used for realizing the characteristics of FSS ultra wide band, high transmittance and high angle stability transmission band. N relatively wide metal strips (3) extend out of the edge of the metal patch (2), and a resistor (4) connected with the metal patch is used for designing the broadband wave-absorbing characteristic outside the wave-transmitting band, wherein the size of the resistance value and the thickness of the air interlayer can be designed according to the requirement of the wave-absorbing band. In addition, the material of the dielectric plate related to FSS provided by the invention is common knowledge in the field, such as Rogers 4350B.
The sizes of the components related to the invention, such as the width and the length of the metal patch (2) and the width and the length of the metal strip (3), can be determined according to actual conditions.
Fig. 4 to 6 are results of simulation experiments. The parameters of the FSS used in the experiment were as follows: the surface of the dielectric plate (1) is a square with the side length of 14mm, the thickness of the air interlayer (5) of the second layer is 8mm, and the thickness of the whole FSS is 10.5 mm. All dielectric sheets were made of Rogers 4350B sheets having a relative dielectric constant of 3.48 and a loss tangent of 0.0037. The metal patch (3) in the first layer is of a 4-arm square spiral structure, the width of each arm is 0.2mm, and the side length of a circumscribed square of the structure is 2.10 mm; the resistance value of the resistor (4) is 100 omega; the width of the metal strip (5) is 1.0mm, and the length is 4.9 mm. All metals in the structure are copper, and the thickness of the copper is 0.035 mm.
FIG. 4 is a wave-absorbing and wave-transmitting integrated FSS reflection/transmission curve and wave-absorbing rate curve provided by the invention. The abscissa is frequency, the left ordinate is reflection coefficient or transmission coefficient, and the right ordinate is wave-absorbing rate. In fig. 4, the curves with triangular marks represent the wave-absorbing rate curves, the curves with diamond marks represent the reflection coefficient curves, and the curves with circular marks represent the transmission coefficient curves. It can be seen that the present invention has an ultra-wide passband; the wave-transparent band range with the insertion loss of 1dB is 8.94GHz-12.48GHz, the absolute bandwidth is 3.1GHz, and the relative bandwidth is 33.1%. Compared with the first reference and the second reference, the wave-absorbing and wave-transmitting integrated frequency selective surface disclosed by the invention has wider relative bandwidth.
Fig. 5 and 6 are performance curves of the wave-absorbing and wave-transmitting integrated FSS provided by the invention under the conditions of parallel polarization and vertical polarization oblique incidence, respectively. The abscissa in the figure is the frequency and the ordinate is the reflection coefficient or transmission coefficient. The curves in fig. 5 and 6 with reflection coefficients at 0 degrees, 15 degrees, 30 degrees and 45 degrees are labeled as: squares, upward triangles, diamonds, and right triangles; the transmission coefficients are respectively given by the indices of the curves at 0 degrees, 15 degrees, 30 degrees and 45 degrees: circular, downward triangular, leftward triangular, and five-pointed star. It can be seen from the figure that the structure disclosed by the invention has relatively stable wave-transparent band performance under the condition that the oblique incidence angle is less than 45 degrees. It can be seen from the curve shapes of fig. 5 and fig. 6 that the FSS provided by the present invention has polarization insensitivity, i.e., the wave-transparent and wave-absorbing properties are substantially consistent in both polarization modes. As can be seen from the 45-degree reflection coefficient or transmission coefficient curve, the FSS provided by the invention has more excellent angle stability.
The ultra-wide transparent band of the FSS provided by the present invention is summarized again below: since the air interlayer of the second layer has little loss effect on the electromagnetic wave, it only serves to separate the first layer from the second layer. It is required for the ultra-wide transparent band that the structures located at the first and third layers have the characteristics of the ultra-wide transparent band. The first layer, the realization of the ultra-wide transparent band is realized mainly by an N-arm square spiral structure with polarization insensitivity, and the structure has strong parallel resonance characteristics in a broadband range. For the third layer, the FSS is a wide transparent band and is mainly used for matching with the ultra-wide transparent band of the first layer; outside the wave-transparent band, the structure exhibits total reflection characteristics.
Claims (1)
1. A wave-absorbing and wave-transmitting integrated frequency selection surface with an ultra-wide transmission band comprises FSS units which are periodically arranged, wherein each FSS unit is the same; it is characterized in that the preparation method is characterized in that,
each FSS cell comprises a three-layer structure, respectively: a first layer, a second layer, and a third layer;
the first layer comprises a dielectric plate (1), a metal patch (2) is arranged in the center of the upper surface of the dielectric plate (1), the metal patch (2) is of an N-arm square spiral structure, metal strips (3) are uniformly distributed around the metal patch (2), and each metal strip (3) is connected with the metal patch (3) through a resistor (4); the second layer is an air interlayer (5); the third layer is a wave-transparent layer (6);
the FSS mentioned above refers to a frequency selective surface.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111769368A (en) * | 2020-07-26 | 2020-10-13 | 中国人民解放军国防科技大学 | Wave-absorbing and wave-transmitting integrated frequency selection surface based on gap type resonator |
| CN111783379A (en) * | 2020-07-26 | 2020-10-16 | 中国人民解放军国防科技大学 | Method for improving transmittance of reconfigurable FSS |
| CN112259970A (en) * | 2020-09-28 | 2021-01-22 | 东莞同济大学研究院 | Broadband wave-transmitting absorption-transmission integrated electromagnetic superstructure |
| CN113314850A (en) * | 2021-05-08 | 2021-08-27 | 南京邮电大学 | 2.5D multilayer frequency selective surface |
| CN113381194A (en) * | 2020-12-25 | 2021-09-10 | 中国航空工业集团公司沈阳飞机设计研究所 | Frequency selective wave absorber |
| CN113690626A (en) * | 2021-08-18 | 2021-11-23 | 电子科技大学 | Wide-angle broadband metamaterial wave-absorbing structure and design method thereof |
| CN113692212A (en) * | 2021-08-23 | 2021-11-23 | 北京大学 | Multilayer wave absorber structure and application thereof |
| CN114336006A (en) * | 2021-11-29 | 2022-04-12 | 中国人民解放军国防科技大学 | Antenna with frequency reconfigurable in-phase reflection characteristic |
| CN114361806A (en) * | 2022-01-11 | 2022-04-15 | 西安电子科技大学 | Miniaturized suction-penetration integrated frequency selective surface |
| CN114498052A (en) * | 2022-02-09 | 2022-05-13 | 西安电子科技大学 | Low-profile broadband super-surface structure with wave-absorbing and wave-transmitting amplitude regulation and control characteristics |
| CN115101944A (en) * | 2022-06-28 | 2022-09-23 | 北京航空航天大学 | Single-passband metamaterial frequency selective surface wave-absorbing structure |
| CN115360526A (en) * | 2022-09-19 | 2022-11-18 | 西安电子科技大学 | Frequency selection super surface structure with double wave-transmitting frequency bands and three wave-absorbing frequency bands |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060227422A1 (en) * | 2005-04-12 | 2006-10-12 | Brian Monacelli | Circular polarizer using frequency selective surfaces |
| CN107946762A (en) * | 2017-11-15 | 2018-04-20 | 哈尔滨工业大学 | X-band based on C-type clamp layer radome wall construction minimizes high wave transparent FSS |
| CN109149099A (en) * | 2018-07-31 | 2019-01-04 | 电子科技大学 | A kind of restructural FSS antenna house of wideband frequency |
| CN109921192A (en) * | 2019-03-06 | 2019-06-21 | 西安电子科技大学 | A kind of low frequency wave transparent high-frequency wideband inhales the frequency screening device of wave |
-
2020
- 2020-01-12 CN CN202010029082.8A patent/CN111048907A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060227422A1 (en) * | 2005-04-12 | 2006-10-12 | Brian Monacelli | Circular polarizer using frequency selective surfaces |
| CN107946762A (en) * | 2017-11-15 | 2018-04-20 | 哈尔滨工业大学 | X-band based on C-type clamp layer radome wall construction minimizes high wave transparent FSS |
| CN109149099A (en) * | 2018-07-31 | 2019-01-04 | 电子科技大学 | A kind of restructural FSS antenna house of wideband frequency |
| CN109921192A (en) * | 2019-03-06 | 2019-06-21 | 西安电子科技大学 | A kind of low frequency wave transparent high-frequency wideband inhales the frequency screening device of wave |
Non-Patent Citations (2)
| Title |
|---|
| QIANG CHEN: "《Frequency-Selective Rasorber With Interabsorption Band Transparent Window and Interdigital Resonator》", 《 IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION》 * |
| QIANG CHEN: "《Miniaturized Frequency-Selective Rasorber With a Wide Transmission Band Using Circular Spiral Resonator》", 《IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION》 * |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111783379A (en) * | 2020-07-26 | 2020-10-16 | 中国人民解放军国防科技大学 | Method for improving transmittance of reconfigurable FSS |
| CN111783379B (en) * | 2020-07-26 | 2024-06-11 | 中国人民解放军国防科技大学 | Method for improving transmittance of reconfigurable FSS |
| CN111769368A (en) * | 2020-07-26 | 2020-10-13 | 中国人民解放军国防科技大学 | Wave-absorbing and wave-transmitting integrated frequency selection surface based on gap type resonator |
| CN112259970B (en) * | 2020-09-28 | 2022-08-09 | 东莞同济大学研究院 | Broadband wave-transmitting absorption-transmission integrated electromagnetic superstructure |
| CN112259970A (en) * | 2020-09-28 | 2021-01-22 | 东莞同济大学研究院 | Broadband wave-transmitting absorption-transmission integrated electromagnetic superstructure |
| CN113381194A (en) * | 2020-12-25 | 2021-09-10 | 中国航空工业集团公司沈阳飞机设计研究所 | Frequency selective wave absorber |
| CN113381194B (en) * | 2020-12-25 | 2023-06-02 | 中国航空工业集团公司沈阳飞机设计研究所 | Frequency selective wave absorber |
| CN113314850A (en) * | 2021-05-08 | 2021-08-27 | 南京邮电大学 | 2.5D multilayer frequency selective surface |
| CN113690626B (en) * | 2021-08-18 | 2022-07-29 | 电子科技大学 | Wide-angle broadband metamaterial wave-absorbing structure and design method thereof |
| CN113690626A (en) * | 2021-08-18 | 2021-11-23 | 电子科技大学 | Wide-angle broadband metamaterial wave-absorbing structure and design method thereof |
| CN113692212A (en) * | 2021-08-23 | 2021-11-23 | 北京大学 | Multilayer wave absorber structure and application thereof |
| CN113692212B (en) * | 2021-08-23 | 2022-08-02 | 北京大学 | Multilayer wave absorber structure and application thereof |
| CN114336006A (en) * | 2021-11-29 | 2022-04-12 | 中国人民解放军国防科技大学 | Antenna with frequency reconfigurable in-phase reflection characteristic |
| CN114361806A (en) * | 2022-01-11 | 2022-04-15 | 西安电子科技大学 | Miniaturized suction-penetration integrated frequency selective surface |
| CN114498052A (en) * | 2022-02-09 | 2022-05-13 | 西安电子科技大学 | Low-profile broadband super-surface structure with wave-absorbing and wave-transmitting amplitude regulation and control characteristics |
| CN115101944A (en) * | 2022-06-28 | 2022-09-23 | 北京航空航天大学 | Single-passband metamaterial frequency selective surface wave-absorbing structure |
| CN115101944B (en) * | 2022-06-28 | 2024-06-07 | 北京航空航天大学 | Single-passband metamaterial frequency selective surface wave absorbing structure |
| CN115360526A (en) * | 2022-09-19 | 2022-11-18 | 西安电子科技大学 | Frequency selection super surface structure with double wave-transmitting frequency bands and three wave-absorbing frequency bands |
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