CN107579352B - Ultra-wideband frequency selective surface suitable for antenna housing - Google Patents
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Abstract
The invention provides an ultra-wideband frequency selection surface suitable for an antenna housing, which is used for solving the technical problems of overhigh working frequency band and poor edge steep-drop characteristic of the existing ultra-wideband frequency selection surface. The invention realizes the low-frequency ultra-wide transmission performance and the edge steep-drop characteristic, and can be applied to the antenna housing design of platforms such as communication systems, radars, aircrafts and the like.
Description
Technical Field
The invention belongs to the technical field of microwaves, and relates to an ultra-wideband frequency selection surface suitable for an antenna housing, which can be applied to the antenna housing design of platforms such as communication systems, radars, aircrafts and the like.
Background
The frequency selective surface is a two-dimensional periodic surface capable of reflecting or transmitting an electromagnetic wave, which does not absorb energy by itself, but effectively controls the reflection and transmission properties of the electromagnetic wave. Frequency selective surfaces can be classified into two categories according to the frequency response characteristics to electromagnetic waves: one is a band-stop type frequency selective surface which exhibits a total reflection characteristic to electromagnetic waves in a stop band; another is a band-pass type frequency selective surface which exhibits a full transmission characteristic to electromagnetic waves in the pass band. Due to the unique spatial filtering characteristic, the frequency selective surface has great application value in the engineering field, and one important application direction is the antenna housing.
With the development of modern electronic technology, various electronic devices are used excessively, the surrounding environment is flooded with a large amount of electromagnetic radiation, and normal communication devices are also affected by the increasingly worsened electromagnetic environment. In modern communication, radar, aircraft and other systems, it is often desirable that electromagnetic waves within an antenna operating frequency band can smoothly penetrate through a frequency selective surface radome, so that a local antenna can normally operate, and electromagnetic waves outside the antenna operating frequency band are restrained to a certain extent, so that the local antenna cannot enter the interior of the radome, namely, the local antenna has an anti-interference capability. In the systems, in order to ensure the normal operation of the antenna, the frequency selective surface radome is required to be transparent in the antenna operating frequency band, and has the characteristics of small in-band insertion loss, good stability and the like; good reflection characteristics are required outside the operating band of the antenna to reduce interference of clutter with the antenna. In order to minimize the influence of out-of-band noise on the antenna, the transition bandwidth in-band and out-of-band of the frequency selective radome should be as narrow as possible, which requires that the frequency selective radome has good edge steepness characteristics.
In the existing research, the research on the transmission performance of the ultra-wideband frequency selective surface mostly focuses on the X-band and above, and for the S, L band and below, the research on the frequency selective surface mostly considers the transmission capability of the frequency selective surface to the electromagnetic wave in the working frequency range, and the transmission bandwidth is very limited. In addition, in the existing ultra-wideband frequency selective surface, a design that realizes an excellent edge steepness characteristic is rare. How to design a frequency selection surface having both low-frequency ultra-wide transmission performance and excellent edge steep drop characteristics is a problem to be solved urgently.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides an ultra-wideband frequency selection surface suitable for an antenna housing, which is used for solving the technical problems of overhigh working frequency band and poor edge steep drop characteristic of the existing ultra-wideband frequency selection surface.
In order to achieve the purpose, the invention adopts the technical scheme that:
the ultra-wideband frequency selection surface comprises M multiplied by N passive resonance units which are periodically arranged, wherein M is larger than or equal to 3, N is larger than or equal to 3, each passive resonance unit comprises an upper first medium plate 1, an upper second medium plate 3, a first foam interlayer 4, a middle medium plate 6, a second foam interlayer 7, a lower first medium plate 8 and a lower second medium plate 10 which are sequentially stacked from top to bottom, a first circular patch 2 is printed at the center position of the upper surface of the upper second medium plate 3, a curved patch 5 consisting of four metal folding lines 51 is printed at the center position of the upper surface of the middle medium plate 6, the four metal folding lines 51 are rotationally and symmetrically arranged at 90 degrees and are connected at symmetrical points, and a second circular patch 9 is printed at the center position of the upper surface of the lower second medium plate 10.
The ultra-wideband frequency selective surface suitable for the radome is characterized in that the upper first dielectric slab 1, the upper second dielectric slab 3, the middle dielectric slab 6, the lower first dielectric slab 8 and the lower second dielectric slab 10 are square slabs with the same specification and dielectric constant, the thickness H1 is 0.3-0.5 mm, the side length D is 14.8-15.5 mm, and the dielectric constant is 2-2.6.
The first foam interlayer 4 and the second foam interlayer 7 are made of cuboid light-weight high-strength foam materials with the same specification and dielectric constant, the cross section of each of the cuboid light-weight high-strength foam materials is a square with the side length equal to that of the five dielectric slabs, the height H2 is 8.5-9.5 mm, and the dielectric constant is 1.1.
The ultra wide band frequency selective surface suitable for the antenna housing is characterized in that the circle center of the first annular patch 2 is located at the center of the upper second dielectric plate 3, the inner diameter is 6.6-6.9 mm, and the outer diameter is 7-7.3 mm.
The four metal folding lines 51 are symmetrically located at the center of the middle-layer dielectric slab 6, each metal folding line 51 is composed of a first L-shaped branch 511, a wavy folding line 512, a second L-shaped branch 513, a third L-shaped branch 514 and a fourth L-shaped branch 515 which are sequentially arranged, short branches of the first L-shaped branch 511 are flush with short branches of the fourth L-shaped branch 515, and the centers of the outer edges of the four metal folding lines are coincident with the center of the edge of the middle-layer dielectric slab 6 where the edge is located.
The ultra wide band frequency selective surface suitable for the antenna housing is characterized in that the circle center of the second annular patch 9 is located at the center of the lower second dielectric plate 10, the inner diameter is 6.2-6.5 mm, and the outer diameter is 6.6-6.9 mm.
Compared with the prior art, the invention has the following advantages:
1. the invention adopts the unit structure which is sequentially stacked from top to bottom, realizes the cascade connection of the first circular patch, the zigzag line patch and the second circular patch, the circular patch and the zigzag line patch have different frequency responses to incident electromagnetic waves, and realizes the ultra-wideband transmission characteristic and the edge steep drop characteristic by utilizing the coupling action among the patches, thereby ensuring that the interference outside the working frequency band is effectively inhibited, and not influencing the original radiation characteristic of the antenna in the working frequency band.
2. The zigzag line patch adopted by the invention is composed of four metal broken lines, each metal broken line comprises four L-shaped branches and wave-shaped broken lines, the current path is prolonged, the working frequency of the frequency selection surface is effectively reduced, the unit size is reduced, the unit period is far shorter than the working wavelength, and the adverse effect of a high-order resonance mode on the performance is inhibited.
3. The first circular patch, the zigzag line patch and the second circular patch are in rotational symmetry structures, and for TE and TM polarized waves in an incident angle range of 0-45 degrees, transmission frequency bands are stable and smooth, insertion loss is small, and stability is good.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the overall structure of the passive resonance unit according to the present invention;
FIG. 3 is a schematic structural view of a metal fold line according to the present invention;
FIG. 4 is a transmission coefficient diagram under irradiation of different polarized waves in an angular range of 0 to 45 degrees in example 1 of the present invention;
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
Example 1
Referring to fig. 1, the ultra-wideband frequency selective surface includes 10 × 10 periodically arranged passive resonance elements.
Referring to fig. 2, the passive resonance unit includes an upper first dielectric plate 1, an upper second dielectric plate 3, a first foam interlayer 4, a middle dielectric plate 6, a second foam interlayer 7, a lower first dielectric plate 8 and a lower second dielectric plate 10, which are sequentially stacked from top to bottom, a first circular patch 2 is printed at a central position of an upper surface of the upper second dielectric plate 3, a circle center of the first circular patch 2 is located at a center of the upper second dielectric plate 3, an inner diameter size is 6.8mm, an outer diameter size is 7.2mm, a meander line patch 5 composed of four metal meander lines 51 is printed at a central position of the upper surface of the middle dielectric plate 6, the four metal meander lines 51 are connected at a central point of the middle dielectric plate 6 and are rotationally and symmetrically arranged at 90 degrees with the point as a symmetry point, a second circular patch 9 is printed at a central position of an upper surface of the lower second dielectric plate 10, a circle center of the second circular patch is located at a center of the lower second dielectric plate 10, the inner diameter size is 6.4mm, the outer diameter size is 6.8mm, the first circular patch 2 and the second circular patch 9 are different in size, high-order frequency response is achieved, transition bandwidth is reduced, out-of-band suppression effect is improved, the first circular patch 2, the zigzag line patch 5 and the second circular patch 9 are of a rotational symmetric structure, stability of frequency selection surface performance is improved, the upper first dielectric plate 1, the upper second dielectric plate 3, the middle dielectric plate 6, the lower first dielectric plate 8 and the lower second dielectric plate 10 are square plates with the same specification and dielectric constant, the thickness H1 is 0.4mm, the side length D is 15mm, the dielectric constant is 2.2, the first foam interlayer 4 and the second foam interlayer 7 are made of cuboid light high-strength PMI foam materials with the same specification and dielectric constant, the cross section shape of the square plates is equal in size to the five dielectric plates, height H2 ═ 8.8mm, and the dielectric constant was 1.1.
Referring to fig. 3, the metal folding line 51 is composed of a first "L" shaped branch segment 511, a wavy folding line 512, a second "L" shaped branch segment 513, a third "L" shaped branch segment 514 and a fourth "L" shaped branch segment 515 which are sequentially arranged, a short branch of the first "L" shaped branch segment 511 is flush with a short branch of the fourth "L" shaped branch segment 515, the center of the outer edge of the first "L" shaped branch segment is coincident with the center of the edge of the middle layer plate 6 where the edge is located, metal folding lines of adjacent passive resonance units are connected with each other at unit junctions, a short branch length L1 of the first "L" shaped branch segment 511 is 0.7mm, a long branch length L2 is 5.5mm, a short branch length L3 of the wavy folding line 512 is 0.9mm, a long branch length L4 is 5mm, a short branch length L6 of the second "L" shaped branch segment 513 is 4.5mm, a long branch length L2 is 514.5 mm, a third "L3875 mm, a short branch length L" 3 is 64.9 mm, the short branch length L10 of the fourth L-shaped branch 515 is 1.3mm, the long branch length L9 is 6.7mm, the line width W of the metal folding line 51 is 0.2mm, and the metal folding line 51 is composed of four L-shaped branches and a wave-shaped folding line, so that the current path is prolonged, the working frequency is reduced, and the unit period is reduced.
Example 2, the structure of this example is the same as example 1, and only the following parameters were adjusted:
the thickness H1 of the upper first dielectric slab 1, the upper second dielectric slab 3, the middle dielectric slab 6, the lower first dielectric slab 8 and the lower second dielectric slab 10 is 0.3mm, the side length D is 14.8mm, the dielectric constant is 2, the height H2 of the first foam interlayer 4 and the second foam interlayer 7 is 8.5mm, the inner diameter of the first circular patch 2 is 6.6mm, the outer diameter is 7mm, the first L-shaped branch 511, the short branch length L1 is 0.6mm, the long branch length L2 is 5mm, the long branch length L4 of the wavy broken line 512 is 4.5mm, the short branch length L6 of the second L-shaped branch 513 is 4mm, the long branch length L5 is 5.4mm, the short branch length L7 of the third L-shaped branch 514 is 0.8mm, the long branch length L8 is 4.9mm, the short branch length L10 of the fourth L-shaped branch 515 is 1mm, the long branch length L9 is 6.7mm, the inner diameter of the second circular patch 9 is 6.2mm, and the outer diameter is 6.6 mm.
Example 3, the structure of this example is the same as example 1, and only the following parameters were adjusted:
the thickness H1 of the upper first dielectric slab 1, the upper second dielectric slab 3, the middle dielectric slab 6, the lower first dielectric slab 8 and the lower second dielectric slab 10 is 0.5mm, the side length D is 15.5mm, the dielectric constant is 2.6, the height H2 of the first foam interlayer 4 and the second foam interlayer 7 is 9.5mm, the inner diameter of the first annular patch 2 is 6.9mm, the outer diameter is 7.4mm, the first L-shaped branch section 511, the short branch length L1 is 0.8mm, the long branch length L2 is 5.7mm, the long branch length L4 of the wavy broken line 512 is 5.1mm, the short branch length L6 of the second L-shaped branch 513 is 5.4mm, the long branch length L5 is 5.6mm, the short branch length L7 of the third L-shaped branch 514 is 1mm, the long branch length L8 is 6mm, the short branch length L10 of the fourth L-shaped branch 515 is 1.2mm, the long branch length L9 is 7mm, the inner diameter of the second circular patch 9 is 6.5mm, and the outer diameter is 6.9 mm.
The technical effects of the invention are further explained by combining simulation tests as follows:
1. simulation conditions and contents:
the transmission coefficients under TE and TM polarized wave irradiation in the angle range of 0 to 45 ° in example 1 were simulated by commercial simulation software HFSS _15.0, and the results are shown in fig. 4, where fig. 4(a) is a transmission coefficient graph under TE polarized wave irradiation in the angle range of 0 to 45 ° in example 1, and fig. 4(b) is a transmission coefficient graph under TM polarized wave irradiation in the angle range of 0 to 45 ° in example 1.
2. And (3) simulation result analysis:
referring to fig. 4(a), in embodiment 1, the center frequency is 2.16GHz, the transmission passband frequency range is 0.51 to 3.81GHz, and for electromagnetic waves incident in an angular domain of 0 to 45 ° in this passband frequency range, the insertion loss of the frequency selective surface under the irradiation of TE polarized waves is less than 3dB, the relative frequency bandwidth reaches 153%, an ultra-wide transmission characteristic is realized, and meanwhile, the transmission passband edge has a steep drop characteristic, the transmission coefficient rapidly drops to-55 dB, and remains below-15 dB in a wider frequency band, and the out-of-band rejection performance is good.
Referring to fig. 4(b), the transmission performance of example 1 under TM polarized wave irradiation is substantially the same as that of fig. 4(a), a steep drop characteristic is also realized at the passband edge, the transmission coefficient rapidly drops to-45 dB, and remains below-10 dB in a wider frequency band thereafter, and the out-of-band rejection performance is good.
The simulation results show that the invention realizes the low-frequency ultra-wide transmission characteristic, has good edge steep-drop characteristic and can keep stable performance for the electromagnetic waves incident at different angles and polarization modes.
The foregoing description is only an example of the present invention and does not constitute any limitation to the present invention, and it will be apparent to those skilled in the art that various modifications and variations in form and detail may be made without departing from the principle of the present invention after understanding the content and principle of the present invention, but these modifications and variations are within the scope of the claims of the present invention.
Claims (5)
1. An ultra-wideband frequency selective surface suitable for an antenna housing comprises M multiplied by N passive resonance units which are periodically arranged, wherein M is more than or equal to 3, N is more than or equal to 3, and the ultra-wideband frequency selective surface is characterized in that: the passive resonance unit comprises an upper first dielectric plate (1), an upper second dielectric plate (3), a first foam interlayer (4), a middle dielectric plate (6), a second foam interlayer (7), a lower first dielectric plate (8) and a lower second dielectric plate (10) which are sequentially stacked from top to bottom, wherein a first circular patch (2) is printed at the center of the upper surface of the upper second dielectric plate (3), a zigzag line patch (5) consisting of four metal zigzag lines (51) is printed at the center of the upper surface of the middle dielectric plate (6), the four metal zigzag lines (51) are arranged in a 90-degree rotational symmetry manner and are connected at symmetrical points, the symmetrical points are located at the center of the middle dielectric plate (6), and each metal zigzag line (51) consists of a first L-shaped branch node (511), a wave-shaped folding line (512), a second L-shaped branch node (513) and a second L-shaped branch node (513) which are sequentially arranged, The third L-shaped branch (514) and the fourth L-shaped branch (515) are arranged, the short branch of the first L-shaped branch (511) is flush with the short branch of the fourth L-shaped branch (515), and the center of the outer edge of the first L-shaped branch is superposed with the center of the edge of the middle-layer dielectric slab (6) where the edge is located; and a second annular patch (9) is printed at the center of the upper surface of the lower second dielectric plate (10).
2. An ultra-wideband frequency selective surface for a radome of claim 1, wherein: the first dielectric slab (1) of upper strata, upper second dielectric slab (3), middle level dielectric slab (6), first dielectric slab (8) of lower floor and lower floor second dielectric slab (10), adopt the equal square panel of specification and dielectric constant, its thickness H1 is 0.3mm ~ 0.5mm, and length of a side D is 14.8 ~ 15.5mm, and the dielectric constant is 2 ~ 2.6.
3. An ultra-wideband frequency selective surface for a radome of claim 1, wherein: the first foam interlayer (4) and the second foam interlayer (7) are made of cuboid light-weight high-strength foam materials with the same specification and dielectric constant, the cross section of each foam interlayer is a square with the side length equal to that of the five dielectric slabs, the height H2 is 8.5-9.5 mm, and the dielectric constant is 1.1.
4. An ultra-wideband frequency selective surface for a radome of claim 1, wherein: the circle center of the first circular patch (2) is located at the center of the upper second dielectric slab (3), the inner diameter is 6.6-6.9 mm, and the outer diameter is 7-7.4 mm.
5. An ultra-wideband frequency selective surface for a radome of claim 1, wherein: the circle center of the second annular patch (9) is located at the center of the lower second dielectric slab (10), the inner diameter is 6.2-6.5 mm, and the outer diameter is 6.6-6.9 mm.
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| CN108897331A (en) * | 2018-05-11 | 2018-11-27 | 安徽尼古拉电子科技有限公司 | A kind of aircraft altitude control method and system based on Radar Technology |
| CN108832303B (en) * | 2018-06-07 | 2019-11-15 | 西安电子科技大学 | A kind of frequency-selective surfaces that high angle is stable |
| CN108963395B (en) * | 2018-07-20 | 2019-07-16 | 西安电子科技大学 | A kind of miniaturization band resistance type frequency-selective surfaces |
| CN109449601B (en) * | 2018-10-31 | 2020-10-02 | 宋应龙 | Ultra-wideband frequency selection surface unit based on low-pass and band-pass multilayer coupling |
| CN110034408A (en) * | 2019-04-24 | 2019-07-19 | 西安电子科技大学 | A kind of broad passband 3D frequency-selective surfaces |
| CN110854543B (en) * | 2019-11-15 | 2021-03-30 | 电子科技大学 | Dual-frequency broadband wide-angle circularly polarized grid based on miniaturized unit |
| CN110994172B (en) * | 2019-12-26 | 2021-04-27 | 西安邮电大学 | Antenna housing based on wide stop band low frequency multilayer frequency selective surface |
| CN114976660B (en) * | 2021-02-23 | 2024-06-21 | 西安电子科技大学 | Band-pass type frequency selection surface with ultra-wideband suppression characteristic |
| CN113889767B (en) * | 2021-04-16 | 2024-08-20 | 哈尔滨工业大学 | Liquid crystal tunable super surface with narrow transition bandwidth |
| CN113540784B (en) * | 2021-06-21 | 2022-09-30 | 西安电子科技大学 | Integrated broadband frequency selection antenna cover with heat dissipation characteristic and mobile communication system |
| CN114843725B (en) * | 2022-05-16 | 2023-11-03 | 江苏电子信息职业学院 | Ultra-wideband wide-angle band-stop type frequency selective surface |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7639206B2 (en) * | 2008-05-05 | 2009-12-29 | University Of Central Florida Research Foundation, Inc. | Low-profile frequency selective surface based device and methods of making the same |
| CN105846017A (en) * | 2016-04-19 | 2016-08-10 | 成都德杉科技有限公司 | Frequency selective surface structure with wide passband and ultra-wide stopband |
| CN106887710A (en) * | 2017-03-07 | 2017-06-23 | 西安电子科技大学 | Improve the frequency-selective surfaces structure of angle stability |
-
2017
- 2017-08-11 CN CN201710686760.6A patent/CN107579352B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7639206B2 (en) * | 2008-05-05 | 2009-12-29 | University Of Central Florida Research Foundation, Inc. | Low-profile frequency selective surface based device and methods of making the same |
| CN105846017A (en) * | 2016-04-19 | 2016-08-10 | 成都德杉科技有限公司 | Frequency selective surface structure with wide passband and ultra-wide stopband |
| CN106887710A (en) * | 2017-03-07 | 2017-06-23 | 西安电子科技大学 | Improve the frequency-selective surfaces structure of angle stability |
Non-Patent Citations (2)
| Title |
|---|
| A New Technique for Design of Low-Profile,Second-Order, Bandpass Frequency Selective Surfaces;Mudar Al-Joumayly;《IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION》;20090228;第57卷(第2期);全文 * |
| 小型化频率选择表面研究;王秀芝;《中国博士学位论文全文数据库》;20141231(第9期);第10页 * |
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