CN212033252U - Broadband wave-absorbing metamaterial, antenna housing and antenna system - Google Patents
Broadband wave-absorbing metamaterial, antenna housing and antenna system Download PDFInfo
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- CN212033252U CN212033252U CN202020922476.1U CN202020922476U CN212033252U CN 212033252 U CN212033252 U CN 212033252U CN 202020922476 U CN202020922476 U CN 202020922476U CN 212033252 U CN212033252 U CN 212033252U
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Abstract
The utility model provides a broadband ripples metamaterial, antenna house and antenna system of inhaling. The broadband wave-absorbing metamaterial comprises: a substrate; a plurality of electrically conductive geometric construction layers set gradually in the superpose direction, and electrically conductive geometric construction layer sets up on the base plate, and a plurality of electrically conductive geometric construction layers include: the first conductive geometric structure layer comprises a plurality of first conductive geometric structure units which are arranged in an array, the first conductive geometric structure units comprise at least two first conductive rings which are not connected with each other, and the sizes of the at least two first conductive rings are sequentially reduced; the second conductive geometric structure layer comprises a plurality of second conductive geometric structure units which are arranged in an array, the second conductive geometric structure units comprise at least three second conductive rings which are not connected with each other, and the sizes of the at least three second conductive rings are reduced in sequence. The technical scheme of the utility model the antenna house among the prior art can't restrain the electromagnetic wave outside the operating frequency range and lead to the unable problem of normally working of electromagnetic equipment has been solved.
Description
Technical Field
The utility model relates to an electromagnetic wave filtering field particularly, relates to a broadband ripples metamaterial, antenna house and antenna system of inhaling.
Background
With the continuous development of modern electromagnetic technology, the division of electromagnetic spectrum is more and more fine, and the boundary is more and more unclear. Meanwhile, the development of electromagnetic technology brings great convenience to human life and also generates electromagnetic pollution. At present, the absorption and protection of electromagnetic waves are an important means for treating electromagnetic pollution. C. The filtering structure with high absorption of X, Ku and K wave bands can effectively improve the working environment of radio equipment and reduce electromagnetic pollution.
The filtering structure in the prior art can realize the wave absorbing function, but the capacitance inductance in the filtering structure can change along with the change of the incident angle of the electromagnetic wave after the incident angle of the electromagnetic wave changes, which leads to the change of the loop resonance and influences the wave absorbing performance of the filtering structure, thus leading the antenna cover not to inhibit the electromagnetic wave outside the working frequency band and leading to the problem that the antenna system can not work normally.
In other words, there is a problem in the prior art that the antenna housing cannot suppress electromagnetic waves outside the operating frequency band, which results in the electromagnetic device not working normally.
SUMMERY OF THE UTILITY MODEL
A primary object of the utility model is to provide a broadband ripples metamaterial, antenna house and antenna system of inhaling to solve the problem that the outer electromagnetic wave of the unable suppression working frequency channel of antenna house among the prior art and lead to the unable normal work of electromagnetic equipment.
In order to achieve the above object, according to the utility model discloses an aspect provides a wave-absorbing metamaterial is inhaled to broadband, and wave-absorbing metamaterial includes in the broadband: a substrate; a plurality of electrically conductive geometric construction layers set gradually in the superpose direction, and electrically conductive geometric construction layer sets up on the base plate, and a plurality of electrically conductive geometric construction layers include: the first conductive geometric structure layer comprises a plurality of first conductive geometric structure units which are arranged in an array, the first conductive geometric structure units comprise at least two first conductive rings which are not connected with each other, and the sizes of the at least two first conductive rings are sequentially reduced; the second conductive geometric structure layer comprises a plurality of second conductive geometric structure units which are arranged in an array, the second conductive geometric structure units comprise at least three second conductive rings which are not connected with each other, and the sizes of the at least three second conductive rings are reduced in sequence.
Further, the projections of the first conductive geometry unit and the second conductive geometry unit in the stacking direction at least partially coincide.
Further, the first conductive geometric structural unit comprises two first conductive rings, and the two first conductive rings are concentrically arranged.
Further, the first conductive ring is a polygonal ring or a circular ring.
Furthermore, the first conductive ring located on the outer side of the two first conductive rings is a regular quadrilateral ring, and the first conductive ring located on the inner side of the two first conductive rings is a circular ring.
Furthermore, the second conductive geometric structural unit includes three second conductive rings, and the three second conductive rings are concentrically arranged.
Further, all of the three second conductive rings are polygonal rings.
Further, the innermost second conductive ring of the three second conductive rings is a regular hexagonal ring, and the two second conductive rings except for the innermost second conductive ring are regular quadrilateral rings.
Further, the first conductive geometric structure unit and the second conductive geometric structure unit are both in a regular quadrilateral structure.
Furthermore, the substrate comprises a plurality of dielectric layers, the dielectric layers and the conductive geometric structure layers are sequentially and alternately arranged, and the dielectric layers are arranged between every two adjacent conductive geometric structure layers.
According to the utility model discloses an on the other hand provides an antenna house, inhale ripples metamaterial including the broadband, the ripples metamaterial is inhaled to the broadband for foretell broadband.
According to the utility model discloses an on the other hand provides an antenna system, include the antenna and establish the antenna house on the antenna, the antenna house is foretell antenna house.
Use the technical scheme of the utility model, the broadband is inhaled ripples metamaterial interval arrangement's electrically conductive geometric construction layer of multilayer and is adjusted antenna material's dielectric constant and magnetic permeability, the thickness of protective material has been reduced when having improved protective material's mechanical strength, when making the electromagnetic wave pass through this broadband and inhale ripples metamaterial, the electromagnetic wave forms resonance effect in the broadband is inhaled ripples metamaterial and has improved the wave energy of penetrating, thereby make the electromagnetic wave energy high efficiency of working frequency channel pass through ripples, and can effectively be ended to the electromagnetic wave of non-working frequency channel, and like this, material filtering structure can not change after the incident angle of electromagnetic wave changes and influence its performance of inhaling ripples, thereby solved the outer electromagnetic wave of working frequency channel and lead to the unable problem of normal work of antenna system of inhabitation of antenna house.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic cross-sectional structural view of a first embodiment of a broadband wave-absorbing metamaterial according to the present invention;
figure 2 shows a cross-sectional view of a first conductive geometric structural layer of the broadband absorbing metamaterial of figure 1;
fig. 3 shows a schematic view of the first conductive geometry unit of the first conductive geometry layer of fig. 2 connected to a substrate;
figure 4 shows a cross-sectional view of a second electrically conductive geometric structural layer of the broadband absorbing metamaterial of figure 1;
fig. 5 shows a schematic view of the second conductive geometry unit of the second conductive geometry layer of fig. 4 connected to a substrate;
fig. 6 shows a front view (without showing a substrate) of the assembled first and second conductive geometric units of the broadband absorbing metamaterial of fig. 1;
FIG. 7 is a partial perspective view of the broadband wave-absorbing metamaterial shown in FIG. 1;
FIG. 8 shows a TE polarization S11 curve (where the incident angle is 0 to 40) when a transverse electric wave (TE wave) is irradiated to the broadband wave-absorbing metamaterial of FIG. 1;
FIG. 9 shows a plot of TM polarization S11 (where the incident angle is 0 to 40 °) when transverse magnetic waves (TM waves) are irradiated onto the broadband absorbing metamaterial of FIG. 1; and
fig. 10 shows a schematic diagram of a second embodiment of the first conductive geometric structure unit of the first conductive geometric structure layer of the broadband wave-absorbing metamaterial according to the present invention.
Wherein the figures include the following reference numerals:
10. a substrate; 11. a dielectric layer; 21. a first conductive geometric structure layer; 210. a first conductive geometric structure unit; 211. a first conductive ring; 22. a second conductive geometric structure layer; 220. a second conductive geometry unit; 221. a second conductive ring.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Description of the drawings: the blank regions in the hexagon and the regular quadrangle in fig. 2 to 5 and fig. 10 are all the hollow regions between the adjacent conductive rings of the first conductive geometric structure unit 210 or the second conductive geometric structure unit 220.
The embodiment of the utility model provides an in, antenna system includes the antenna and establishes the antenna house on the antenna.
The embodiment of the utility model provides an in, the antenna house includes the broadband and inhales ripples metamaterial.
The utility model discloses a provide a broadband of wide angle territory dual polarization wide band and inhale ripples metamaterial in embodiment of the utility model, this broadband inhales ripples metamaterial includes current loss material micro-structure, also is electrically conductive geometric construction layer promptly, for example electrically conductive printing ink, resistance such as resistive material are at the material of 10 ~ 1000 omega/sq, and the medium stromatolite (base plate 10 includes a plurality of dielectric layers 11 promptly, and 11 intervals on a plurality of dielectric layers set up). The current lossy material microstructure is comprised of a closed current lossy material line that is centrosymmetric and attached to a dielectric slab (i.e., dielectric layer 11). The utility model discloses a broadband wave-absorbing metamaterial in the embodiment of the utility model reaches wide band wide angle territory C, X, Ku, the high absorptive purpose of K wave band. The utility model discloses a broadband ripples meta-material is inhaled by two-dimensional frequency selection surface combination forms, simple structure, has avoided using loss metal material micro-structure to produce electric capacity and inductance in close scheme, and electric capacity C and inductance L take place acutely to change when the angle changes and influence the performance problem to and because its structure is small, the problem that the processing degree of difficulty is big. In addition, the utility model discloses replace metal construction with current loss material, realized the purpose of wide band (for example 4 to 27GHz) absorption.
The TE wave is a transverse wave of the electromagnetic waves, and the TM wave is a longitudinal wave of the electromagnetic waves.
The utility model discloses reach the embodiment of the utility model provides a broadband ripples meta-material that absorbs wave. The broadband wave-absorbing metamaterial comprises a substrate 10 and a plurality of conductive geometric structure layers. Wherein the plurality of conductive geometric structure layers are sequentially arranged in the stacking direction, the conductive geometric structure layers are arranged on the substrate 10, and the plurality of conductive geometric structure layers include a first conductive geometric structure layer 21 and a second conductive geometric structure layer 22. The first conductive geometric structure layer 21 includes a plurality of first conductive geometric structure units 210 arranged in an array, each of the first conductive geometric structure units 210 includes at least two first conductive rings 211 that are not connected to each other, and the at least two first conductive rings 211 decrease in sequence. The second conductive geometric structure layer 22 includes a plurality of second conductive geometric structure units 220 arranged in an array, each of the second conductive geometric structure units 220 includes at least three second conductive rings 221 that are not connected to each other, and the at least three second conductive rings 221 decrease in sequence.
According to the arrangement, the dielectric constant and the magnetic conductivity of the antenna material can be adjusted by the multiple layers of conductive geometric structure layers arranged at intervals in the broadband wave-absorbing metamaterial, the mechanical strength of the protective material is improved, and the thickness of the protective material is reduced, so that when electromagnetic waves pass through the broadband wave-absorbing metamaterial, the electromagnetic waves form a resonance effect in the broadband wave-absorbing metamaterial and wave-transmitting energy is improved, the electromagnetic waves in a working frequency band can be transmitted efficiently, and the electromagnetic waves in a non-working frequency band can be effectively stopped, therefore, the broadband wave-absorbing metamaterial cannot change after the incident angle of the electromagnetic waves changes to influence the wave-absorbing performance of the broadband wave-absorbing metamaterial, and the problem that the antenna system cannot work normally due to the fact that the antenna housing cannot restrain the electromagnetic waves outside the working frequency band is solved.
Alternatively, the material of each conductive geometric structure layer may be conductive plastic, conductive rubber, conductive composite material, conductive liquid, conductive powder or other material with conductive property.
Specifically, as shown in fig. 1, fig. 6 and fig. 7, in an embodiment of the present invention, the broadband wave-absorbing metamaterial includes two conductive geometric structure layers. Wherein the two conductive geometric structure layers are sequentially arranged in the stacking direction, the conductive geometric structure layers are arranged on the substrate 10, and the two conductive geometric structure layers comprise a first conductive geometric structure layer 21 and a second conductive geometric structure layer 22. The first conductive geometric structure layer 21 includes a plurality of first conductive geometric structure units 210 arranged in an array, the first conductive geometric structure units 210 include at least two first conductive rings 211 that are not connected to each other, and sizes of the at least two first conductive rings 211 are sequentially reduced. The second conductive geometric structure layer 22 includes a plurality of second conductive geometric structure units 220 arranged in an array, the second conductive geometric structure units 220 include at least three second conductive rings 221 that are not connected to each other, and sizes of the at least three second conductive rings 221 decrease sequentially.
As shown in fig. 1, in the embodiment of the present invention, the first conductive geometric structure layer 21 and the second conductive geometric structure layer 22 are respectively disposed on the corresponding dielectric layers 11, the bottom of the broadband wave-absorbing metamaterial is further provided with a metal back plate, and the first conductive geometric structure layer 21 is closer to the metal back plate than the second conductive geometric structure layer 22.
The first conductive geometry units 210 and the second conductive geometry units 220 are arranged in a periodic row and column (3 rows by 3 columns).
In the above arrangement, the two conductive geometric structure layers arranged at intervals of the broadband wave-absorbing metamaterial can well adjust the dielectric constant and the magnetic permeability of the antenna material, the mechanical strength of the protective material is improved, and the thickness of the protective material is reduced, so that when electromagnetic waves pass through the broadband wave-absorbing metamaterial, the electromagnetic waves can well form a resonance effect in the broadband wave-absorbing metamaterial to improve wave-transmitting energy, so that the electromagnetic waves in a working frequency band can be transmitted efficiently, and the electromagnetic waves in a non-working frequency band can be effectively blocked, therefore, the material filtering structure cannot change after the incident angle of the electromagnetic waves changes to influence the wave-absorbing performance of the material filtering structure, and the problem that the antenna system cannot work normally due to the fact that the antenna housing cannot inhibit the electromagnetic waves outside the working frequency band is solved.
Of course, in alternative embodiments not shown in the drawings, the plurality of first conductive geometry units 210 may be arranged in a periodic row-column arrangement or the plurality of second conductive geometry units 220 may be arranged in a periodic row-column arrangement, as the case may be.
To facilitate understanding of the embodiment of the present invention, the first conductive geometric structure layer 21 includes 9 first conductive geometric structure units 210 arranged in a periodic manner (arranged in 3 rows × 3 columns); the second conductive geometry layer 22 includes 9 second conductive geometry units 220 arranged periodically (in 3 rows by 3 columns).
Of course, in alternative embodiments not shown in the drawings, the number of first conductive geometry units 210 and second conductive geometry units 220 may also be arranged according to actual needs.
Specifically, as shown in fig. 3 and fig. 5, the structural period of the metamaterial is 30mm, that is, the length L1 of the minimum unit of the dielectric layer 11 under the first conductive geometric structural unit 210 is 30mm, and the length L2 of the minimum unit of the dielectric layer 11 under the second conductive geometric structural unit 220 is 30 mm.
Specifically, in order to improve the wave-transmitting performance of the electromagnetic package to the maximum extent and enable the electromagnetic wave in the working frequency band to efficiently penetrate through the broadband wave-absorbing metamaterial, the projection portions of the areas where the first conductive geometric structure unit 210 and the second conductive geometric structure unit 220 are located in the stacking direction are overlapped.
According to the arrangement, when the electromagnetic waves are incident to the broadband wave-absorbing metamaterial, a more obvious resonance effect can be formed in the broadband wave-absorbing metamaterial, and the wave transmission energy of the electromagnetic waves can be further improved, so that the purpose of efficient wave transmission is achieved.
Of course, in an alternative embodiment not shown in the drawings of the present invention, the projections of the areas where the first conductive geometry unit 210 and the second conductive geometry unit 220 are located in the stacking direction may be set to completely coincide according to the actual situation.
Specifically, as shown in fig. 2 and 3, the first conductive geometry unit 210 includes two first conductive rings 211, and the two first conductive rings 211 are concentrically arranged.
In the above arrangement, an even gap is formed between the two first conducting rings 211, which is convenient for controlling and adjusting the resonance frequency of the equivalent LC circuit, so that the broadband wave-absorbing metamaterial has better band-pass wave-transmitting performance.
Of course, in an alternative embodiment of the present invention, a non-uniform gap may be formed between the two first conductive rings 211.
In an embodiment of the present invention, the first conductive ring 211 is a polygonal ring or a circular ring.
Alternatively, the polygonal ring may be a three-sided ring, a four-sided ring, a six-sided ring, an eight-sided ring, but is not limited to the above-described shape.
Specifically, as shown in fig. 2 and 3, in the embodiment of the present invention, the first conductive ring 211 located at the outer side of the two first conductive rings 211 is a regular quadrilateral ring, and the first conductive ring 211 located at the inner side of the two first conductive rings 211 is a circular ring.
Specifically, as shown in fig. 3, in the embodiment of the present invention, the length of the edge of the first conductive ring 211 located outside is a1, and the length of the edge of the first conductive ring 211 located outside is a2, where a1 is not less than 8mm and not more than 13mm, and a2 is not less than 7mm and not more than 10 mm.
Specifically, as shown in FIG. 3, the outer diameter of the first conductive ring 211 located inside is a3, and the inner diameter of the first conductive ring 211 located inside is a4, where a3 is 5mm or more and 8mm or less, and a4 is 3mm or more and 7mm or less.
Specifically, in the embodiment of the present invention, the resistance of the first conductive ring 211 located on the outer side is r1, wherein r1 is greater than or equal to 10 Ω/sq and less than or equal to 500 Ω/sq, and the resistance of the first conductive ring 211 located on the inner side is r2, wherein r2 is greater than or equal to 20 Ω/sq and less than or equal to 200 Ω/sq.
In the above arrangement, the two first conductive rings 211 are equivalent to two LC oscillating circuits with different response frequencies. Electromagnetic waves in a frequency band between the response frequencies of the two LC oscillating circuits have high transmittance, and electromagnetic waves in a frequency band outside the two response frequencies are suppressed, so that the electromagnetic waves in an operating band can pass through the broadband wave-absorbing metamaterial, and the electromagnetic waves in a non-operating frequency band are suppressed. Therefore, the electromagnetic wave in the non-working frequency band cannot penetrate through the antenna housing, and the interference of the electromagnetic wave in the non-working frequency band on the normal work of the antenna is avoided. The antenna housing made of the broadband wave-absorbing metamaterial can ensure the normal operation of the antenna.
Specifically, as shown in fig. 4 and 5, the second conductive geometry unit 220 includes three second conductive rings 221, and the three second conductive rings 221 are concentrically arranged. The arrangement can improve the symmetry of the second conductive geometric structure unit 220, so that the broadband wave-absorbing metamaterial has similar band-pass filtering performance on transverse electric wave TE waves and transverse magnetic wave TM waves.
In the embodiment of the present invention, the three second conductive rings 221 are polygonal rings.
Specifically, as shown in fig. 4 and 5, in the embodiment of the present invention, the innermost second conductive ring 221 of the three second conductive rings 221 is a regular hexagonal ring, and the two second conductive rings 221 except for the innermost second conductive ring 221 are regular quadrilateral rings.
Specifically, as shown in FIG. 5, the length of the outer edge of the regular hexagonal ring is b5, and the length of the inner edge of the regular hexagonal ring is b6, wherein b5 is not less than 4mm and not more than 6mm, and b6 is not less than 2mm and not more than 4 mm.
Specifically, as shown in fig. 5, of the two second conductive rings 221 in the regular quadrilateral ring, the length of the edge of the second conductive ring 221 located on the outer side is b1, and the length of the edge of the second conductive ring 221 located on the outer side is b 2; the length of the edge of the second conductive ring 221 located at the inner side is b3, and the length of the edge of the second conductive ring 221 located at the inner side is b4, where b1 is greater than or equal to 10mm and less than or equal to 13mm, b2 is greater than or equal to 8mm and less than or equal to 11mm, b3 is greater than or equal to 7mm and less than or equal to 10mm, and b4 is greater than or equal to 6mm and less than or equal to 9 mm.
Specifically, the square resistance of the innermost second conductive loop 221 is r5, wherein r5 is greater than or equal to 20 Ω/sq and is less than or equal to 1000 Ω/sq; among the two second conductive rings 221 in the shape of regular quadrilateral rings, the square resistance of the second conductive ring 221 positioned at the outer side is r3, wherein r3 is more than or equal to 10 Ω/sq and is less than or equal to 100 Ω/sq; of the two second conductive rings 221 in the shape of regular quadrilateral rings, the square resistance of the second conductive ring 221 located at the inner side is r4, wherein r4 is greater than or equal to 20 Ω/sq and less than or equal to 1000 Ω/sq.
As shown in fig. 2 to 5, in an embodiment of the present invention, the first conductive geometric structure unit 210 and the second conductive geometric structure unit 220 are both regular quadrilateral structures.
The above arrangement may form regular first conductive geometry cells 210 and second conductive geometry cells 220, facilitating the periodic row-column arrangement of the first conductive geometry cells 210 and second conductive geometry cells 220.
In the above arrangement, the three second conductive rings 221 are equivalent to three LC oscillating circuits with different response frequencies. Electromagnetic waves in frequency bands among the response frequencies of the three LC oscillating circuits have high transmittance, and electromagnetic waves in frequency bands other than the three response frequencies are suppressed, so that the electromagnetic waves in the working band can pass through the broadband wave-absorbing metamaterial, and the electromagnetic waves in the non-working band are suppressed. Therefore, the electromagnetic wave in the non-working frequency band cannot penetrate through the antenna housing, and the interference of the electromagnetic wave in the non-working frequency band on the normal work of the antenna is avoided. The antenna housing made of the broadband wave-absorbing metamaterial can ensure the normal operation of the antenna.
Example one
As shown in fig. 2 to 5, in the first embodiment of the present invention, the broadband wave-absorbing metamaterial includes a substrate 10 and two conductive geometric structure layers. The substrate 10 comprises two dielectric layers 11, the two dielectric layers 11 and two conductive geometric structure layers are sequentially and alternately arranged, and the dielectric layer 11 is arranged between the two adjacent conductive geometric structure layers; the first conductive geometric structure layer 21 includes nine first conductive geometric structure units 210 arranged in an array (arranged in three rows and three columns), each first conductive geometric structure unit 210 includes two first conductive rings 211 that are not connected to each other, and the two first conductive rings 211 decrease in sequence; the second conductive geometric structure layer 22 includes nine second conductive geometric structure units 220 arranged in an array (arranged in three rows and three columns), each second conductive geometric structure unit 220 includes three second conductive rings 221 that are not connected to each other, and the three second conductive rings 221 decrease in sequence. Specifically, as shown in fig. 3, in the first embodiment of the present invention, the length of the side a1 of the outer edge of the first conductive ring 211 located at the outer side is 12.7mm, and the length of the side a2 of the inner edge of the first conductive ring 211 located at the outer side is 8.5 mm.
Specifically, as shown in fig. 3, in the first embodiment of the present invention, the outer diameter a3 of the first conductive ring 211 located inside is 8mm, and the inner diameter a4 of the first conductive ring 211 located inside is 6 mm.
Specifically, in the first embodiment of the present invention, the sheet resistance r1 of the first conductive ring 211 located at the outer side is 20 Ω/sq, and the sheet resistance r2 of the first conductive ring 211 located at the inner side is 50 Ω/sq.
Specifically, as shown in fig. 5, in the first embodiment of the present invention, the innermost second conductive ring 221 of the three second conductive rings 221 is a regular hexagonal ring, the outer edge length b5 of the regular hexagonal ring is 3.5mm, and the inner edge length b6 of the regular hexagonal ring is 2.5 mm.
Specifically, as shown in fig. 5, in the first embodiment of the present invention, in the two second conductive rings 221 in the shape of regular quadrilateral rings, the side length b1 of the outer edge of the second conductive ring 221 located at the outer side is 11.3mm, and the side length b2 of the inner edge of the second conductive ring 221 located at the outer side is 10.6 mm; the side length b3 of the outer edge of the inner second conductive ring 221 is 9.9mm, and the side length b4 of the inner edge of the inner second conductive ring 221 is 7.1 mm.
Specifically, in the first embodiment of the present invention, the sheet resistance of the innermost second conductive ring 221 is r5 is 300 Ω/sq; of the two second conductive rings 221 in the shape of regular quadrilateral rings, the square resistance r3 of the second conductive ring 221 located at the outer side is 50 Ω/sq; of the two second conductive rings 221 in the shape of regular quadrilateral rings, the square resistance r4 of the inner second conductive ring 221 is 700 Ω/sq.
Preferably, the two dielectric layers 11 are made of PMI (polymethacrylimide) foam, both dielectric coefficients are 1.14, and both loss tangent values are 0.004.
As shown in fig. 1, the thickness h1 of the dielectric layer 11 supporting the first conductive geometric structure layer 21 is 4mm, and the thickness h2 of the dielectric layer 11 supporting the second conductive geometric structure layer 22 is 4 mm.
In other alternative embodiments, the dielectric layer 11 may also be made of one of a ceramic material, a ferroelectric material, a ferrite material, or a ferromagnetic material.
It should be noted that, within the range of the above parameter values, by appropriately changing the above parameter values, the broadband wave-absorbing metamaterial can realize broadband wave absorption of 4-27 GHz.
Fig. 8 shows a polarization S11 (insertion loss) curve of a transverse electric wave (TE wave) irradiated to the broadband wave-absorbing metamaterial in the above embodiment; fig. 9 shows a polarization S11 (insertion loss) curve of transverse magnetic waves (TM waves) when irradiated to a broadband absorbing metamaterial in the above embodiments. The insertion loss is also referred to as an electromagnetic wave transmission coefficient.
As can be seen from fig. 8 and 9, when the electromagnetic waves (TE waves, TM waves) are irradiated to the material, the transmission coefficients of the electromagnetic waves in the frequency range of 4 to 28GHZ are both less than-7 dB, indicating a good out-of-band suppression effect in this frequency range. From the results, the broadband wave-absorbing metamaterial in the embodiment basically achieves the purpose of broadband wide-angle-area absorption in a wide-angle-area range of 0-40 degrees.
Example two
The second embodiment is different from the first embodiment in that:
as shown in fig. 10, in the second embodiment of the present invention, the two first conductive rings 211 in the first conductive geometric structural unit 210 are regular quadrilateral rings.
Specifically, as shown in fig. 10, in the second embodiment of the present invention, the side length a5 of the outer edge of the inner first conductive ring 211 is 8mm, and the side length a6 of the inner edge of the inner first conductive ring 211 is 6 mm.
Of course, in an alternative embodiment not shown in the drawings of the present invention, the two first conductive rings 211 in the first conductive geometric structural unit 210 may be configured as circular rings according to actual situations.
From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: the two conductive geometric structure layers (the first conductive geometric structure layer and the second conductive geometric structure layer) arranged at intervals of the material filtering structure can adjust the dielectric constant and the magnetic conductivity of an antenna material, the mechanical strength of a protection material is improved, meanwhile, the thickness of the protection material is reduced, when electromagnetic waves pass through the broadband wave-absorbing metamaterial, the electromagnetic waves form a resonance effect in the broadband wave-absorbing metamaterial to improve wave-transmitting energy, the electromagnetic waves in a working frequency band can be transmitted efficiently, and the electromagnetic waves in a non-working frequency band can be effectively blocked, so that the material filtering structure cannot change after the incident angle of the electromagnetic waves changes to influence the wave-absorbing performance of the material filtering structure, and the problem that the antenna system cannot normally work due to the fact that the antenna housing cannot inhibit the electromagnetic waves outside the working frequency band is solved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. A broadband wave-absorbing metamaterial is characterized by comprising:
a substrate (10);
a plurality of conductive geometric structure layers arranged in sequence in a stacking direction, the conductive geometric structure layers being arranged on the substrate (10), the plurality of conductive geometric structure layers comprising:
the first conductive geometric structure layer (21) comprises a plurality of first conductive geometric structure units (210) arranged in an array, the first conductive geometric structure units (210) comprise at least two first conductive rings (211) which are not connected with each other, and the sizes of the at least two first conductive rings (211) are sequentially reduced;
the second conductive geometric structure layer (22) comprises a plurality of second conductive geometric structure units (220) which are arranged in an array, the second conductive geometric structure units (220) comprise at least three second conductive rings (221) which are not connected with each other, and the sizes of the at least three second conductive rings (221) are sequentially reduced.
2. The broadband wave absorbing metamaterial according to claim 1, wherein projections of the first conductive geometry unit (210) and the second conductive geometry unit (220) in the stacking direction at least partially coincide.
3. The broadband wave-absorbing metamaterial according to claim 1, wherein the first conductive geometric structure unit (210) comprises two first conductive rings (211), and the two first conductive rings (211) are concentrically arranged.
4. The broadband wave-absorbing metamaterial according to claim 3, wherein the first conductive ring (211) is a polygonal ring or a circular ring.
5. The broadband wave-absorbing metamaterial according to claim 4, wherein the outer one (211) of the two first conductive rings (211) is a regular quadrilateral ring, and the inner one (211) of the two first conductive rings (211) is a circular ring.
6. The broadband wave absorbing metamaterial according to any one of claims 1 to 5, wherein the second conductive geometric structure unit (220) comprises three second conductive rings (221), and the three second conductive rings (221) are concentrically arranged.
7. The broadband wave-absorbing metamaterial according to claim 6, wherein all three of the second conductive rings (221) are polygonal rings.
8. The broadband wave-absorbing metamaterial according to claim 7, wherein the innermost second conductive ring (221) of the three second conductive rings (221) is a regular hexagonal ring, and the two second conductive rings (221) except the innermost second conductive ring (221) are regular quadrilateral rings.
9. The broadband wave-absorbing metamaterial according to any one of claims 1 to 5, wherein the first conductive geometric structure unit (210) and the second conductive geometric structure unit (220) are both of a regular quadrilateral structure.
10. The broadband wave-absorbing metamaterial according to any one of claims 1 to 5, wherein the substrate (10) comprises a plurality of dielectric layers (11), the dielectric layers (11) and the conductive geometric structure layers are sequentially arranged alternately, and the dielectric layer (11) is arranged between two adjacent conductive geometric structure layers.
11. An antenna housing comprises a broadband wave-absorbing metamaterial, and is characterized in that the broadband wave-absorbing metamaterial is as claimed in any one of claims 1 to 10.
12. An antenna system comprising an antenna and a radome provided on the antenna, wherein the radome is the radome of claim 11.
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| CN202020922476.1U CN212033252U (en) | 2020-05-27 | 2020-05-27 | Broadband wave-absorbing metamaterial, antenna housing and antenna system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023159637A1 (en) * | 2022-02-28 | 2023-08-31 | 京东方科技集团股份有限公司 | Frequency selective surface unit, frequency selective surface structure, electronic device, and radome |
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2020
- 2020-05-27 CN CN202020922476.1U patent/CN212033252U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023159637A1 (en) * | 2022-02-28 | 2023-08-31 | 京东方科技集团股份有限公司 | Frequency selective surface unit, frequency selective surface structure, electronic device, and radome |
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