CN112821062B - Ultra-thin absorption type antenna house - Google Patents
Ultra-thin absorption type antenna house Download PDFInfo
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- CN112821062B CN112821062B CN202011489602.XA CN202011489602A CN112821062B CN 112821062 B CN112821062 B CN 112821062B CN 202011489602 A CN202011489602 A CN 202011489602A CN 112821062 B CN112821062 B CN 112821062B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
- H01Q1/427—Flexible radomes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
- H01Q17/008—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems with a particular shape
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Abstract
The invention discloses an ultrathin absorption type antenna housing, which comprises: the absorption unit comprises a medium substrate, an upper metal layer attached to one side surface of the medium substrate and a lower metal layer attached to the other side surface of the medium substrate; the upper metal layer comprises a first metal component, the lower metal layer comprises a second metal component, the first metal component is connected with the second metal component through a metalized through hole, and the first metal component and the second metal component form a first plane spiral structure; the first metal assembly is rotated to obtain a third metal assembly, the second metal assembly is rotated to obtain a fourth metal assembly, and the third metal assembly and the fourth metal assembly form a second planar spiral structure. According to the invention, the radome has a low profile, has an ultrathin effect, can independently control the absorption frequency band, realizes in-band transmission of multi-frequency band and out-of-band absorption, can be applied to a radar system, and realizes the function of a stealth radome.
Description
Technical Field
The invention relates to the technical field of microwaves, in particular to an ultrathin absorption type antenna housing.
Background
With the continuous development of the detection technology, the radar stealth technology has become one of the research hotspots of scholars at home and abroad. The radar system can generate strong scattering to expose a target when working, and the research on the invisible antenna housing is very important for solving the problem. The conventional antenna cover generally uses a band-pass frequency selective surface, so that electromagnetic waves in an in-band mode, i.e., an operating frequency band of the antenna, are transmitted, and electromagnetic waves out of the band are scattered to other directions. Nowadays, in order to reduce the radar scattering cross section and reduce the probability of discovering a target, some antenna covers containing wave-transparent windows and capable of absorbing out-of-band electromagnetic waves are paid great attention, and therefore the stealth function of the antenna covers is achieved. However, due to the operating characteristics of the frequency selective surface, there are problems that the cross section is large and the absorption frequency cannot be independently controlled, and further improvement is required.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the ultrathin absorption type radome, which has the advantages of low radome profile, ultrathin effect, capability of independently controlling absorption frequency bands, realization of in-band transmission and double-frequency-band out-of-band absorption, application to a radar system and realization of the function of a stealth radome. To achieve the above objects and other advantages in accordance with the present invention, there is provided an ultra-thin absorption type radome comprising:
the absorption unit comprises a medium substrate, an upper metal layer attached to one side surface of the medium substrate and a lower metal layer attached to the other side surface of the medium substrate;
the upper metal layer comprises a first metal component, the lower metal layer comprises a second metal component, the first metal component is connected with the second metal component through a metalized through hole, and the first metal component and the second metal component form a first plane spiral structure;
the first metal assembly is rotated to obtain a third metal assembly, and the structure of the third metal assembly is the same as that of the first metal assembly and is different in size;
and the second metal assembly is rotated to obtain a fourth metal assembly, the structure of the fourth metal assembly is the same as that of the second metal assembly, and the size of the fourth metal assembly is different from that of the second metal assembly, and the third metal assembly and the fourth metal assembly form a second planar spiral structure.
Preferably, the first metal component includes a first metal strip having two ends fixedly connected with metal rings, a second metal strip having one end fixedly connected with a metal ring, and a third metal strip having two ends fixedly connected with metal rings and a middle end loaded with a lumped resistor and a solder table.
Preferably, the second metal component includes two fourth metal strips with metal rings fixedly connected to two ends and a fifth metal strip with metal rings fixedly connected to one end.
Preferably, the first planar spiral structure and the second planar spiral structure operate at different out-of-band absorption frequencies, and the first planar spiral structure operates at a first absorption frequency f 1 The second planar helical structure operates at a second absorption frequency f 2 。
Preferably, the absorption unit includes a first group of planar spiral structures and a second group of planar spiral structures, the first group of planar spiral structures is formed by first metal components and third metal components which are arranged in different ways, and the second group of planar spiral structures is formed by second metal components and fourth metal components which are arranged in different ways.
Preferably, the first group of planar spiral structures includes a first metal pattern, a second metal pattern, a third metal pattern, a fourth metal pattern, a fifth metal pattern, a sixth metal pattern, a seventh metal pattern, an eighth metal pattern, a ninth metal pattern, a tenth metal pattern, an eleventh metal pattern, a twelfth metal pattern, a thirteenth metal pattern, a fourteenth metal pattern, a fifteenth metal pattern, and a sixteenth metal pattern, the second group of planar spiral structures includes a seventeenth metal pattern, an eighteenth metal pattern, a nineteenth metal pattern, a twentieth metal pattern, a twenty-first metal pattern, a twenty-second metal pattern, a twenty-third metal pattern, a twenty-fourth metal pattern, a twenty-fifth metal pattern, a twenty-sixth metal pattern, a twenty-seventh metal pattern, a twenty-eighth metal pattern, a twenty-ninth metal pattern, a thirtieth metal pattern, a thirty-eleventh metal pattern, and a thirty-second metal pattern, the first metal pattern, the second metal pattern, the third metal pattern, and the fourth metal pattern are located on the same diagonal line, the first metal pattern and the second metal pattern are symmetrically arranged around the fourth metal pattern, and the fourth metal pattern is rotated at 180 degrees around the center point of the first metal pattern; the third metal pattern and the fourth metal pattern are in mirror symmetry and are arranged at intervals; a fifth metal pattern, a sixth metal pattern, a seventh metal pattern, an eighth metal pattern on the other diagonal line; the fifth metal pattern and the sixth metal pattern are in mirror symmetry and are arranged at intervals; the seventh metal pattern, the eighth metal pattern, the fifth metal pattern, the sixth metal pattern and the fourth metal pattern are obtained by rotating 180 degrees around the central point of the square absorption unit; the seventh metal pattern and the eighth metal pattern are in mirror symmetry and are arranged at intervals; the first metal pattern and the second metal pattern are arranged in a mirror symmetry mode at intervals, and the third metal pattern, the fourth metal pattern, the fifth metal pattern, the sixth metal pattern, the seventh metal pattern, the eighth metal pattern and the mirror symmetry mode correspond to the other diagonal line.
Preferably, the ninth metal pattern and the tenth metal pattern are obtained by rotating the first metal pattern and the second metal pattern by 90 degrees clockwise around the central point of the quarter-cycle unit, keeping the patterns unchanged, and changing the size of the patterns; the eleventh metal pattern and the twelfth metal pattern are obtained by clockwise rotating the third metal pattern and the fourth metal pattern by 90 degrees around the central point of the quarter-cycle unit, keeping the patterns unchanged and changing the size of the patterns; the thirteenth metal pattern and the fourteenth metal pattern are obtained by rotating the fifth metal pattern and the sixth metal pattern by 90 degrees anticlockwise around the central point of the quarter-cycle unit, keeping the patterns unchanged and changing the size of the patterns; the fifteenth metal pattern and the sixteenth metal pattern are obtained by rotating the seventh metal pattern and the eighth metal pattern by 90 degrees anticlockwise around the central point of the quarter-cycle unit, keeping the patterns unchanged and changing the size.
Preferably, the first metal pattern, the second metal pattern, the third metal pattern, the fourth metal pattern, the fifth metal pattern, the sixth metal pattern, the seventh metal pattern, the eighth metal pattern, the ninth metal pattern, the tenth metal pattern, the eleventh metal pattern, the twelfth metal pattern, the thirteenth metal pattern, the fourteenth metal pattern, the fifteenth metal pattern, the sixteenth metal pattern are arranged in the same manner as the corresponding seventeenth metal pattern, the eighteenth metal pattern, the nineteenth metal pattern, the twentieth metal pattern, the twenty-first metal pattern, the twenty-second metal pattern, the twenty-third metal pattern, the twenty-fourth metal pattern, the twenty-fifth metal pattern, the twenty-sixth metal pattern, the twenty-seventh metal pattern, the twenty-eighth metal pattern, the twenty-ninth metal pattern, the thirty-third metal pattern and the thirty-second metal pattern, and the eight planar spiral structures working in the first absorption frequency band f1 are distributed along two diagonal lines through the connection of metallized through holes, and the corresponding first metal pattern, second metal pattern, third metal pattern, fourth metal pattern, fifth metal pattern, sixth metal pattern, seventh metal pattern, eighth metal pattern, seventeenth metal pattern, eighteenth metal pattern, nineteenth metal pattern, twentieth metal pattern, twenty-first metal pattern, twenty-second metal pattern, twenty-third metal pattern, twenty-fourth metal pattern, ninth metal pattern, tenth metal pattern, eleventh metal pattern, twelfth metal pattern, thirteenth metal pattern, fourteenth metal pattern, fifteenth metal pattern, sixteenth metal pattern and twenty-fifth metal pattern which are positioned in the 2 nd absorption frequency band f2 are distributed along two diagonal lines, A twenty-sixth metal pattern, a twenty-seventh metal pattern, a twenty-eighth metal pattern, a twenty-ninth metal pattern, a thirty-fifth metal pattern, a thirty-sixth metal pattern, and a thirty-second metal pattern.
Preferably, the first absorption band f 1 And a second absorption band f 2 The frequency bands between the two bands form the pass band of the antenna housing, and any absorption frequency band can be independently controlled by a periodic structure formed by the corresponding eight spiral structures.
Preferably, the antenna housing is of a single-layer structure and absorbs double frequency, and the absorption units form a periodic array by means of m × n arrangement, wherein m is larger than or equal to 1, and n is larger than or equal to 1.
Compared with the prior art, the invention has the beneficial effects that:
(1) The invention can realize independent control of two out-of-band absorption frequency bands through the single-layer dielectric plate.
(2) The antenna housing structure has the characteristic of low section, the thickness of the antenna housing structure is only one layer of dielectric substrate thickness, the wavelength is less than 0.05, and the antenna housing structure has an ultrathin effect.
(3) The invention has certain miniaturization effect.
(4) The invention can realize high wave-transparent in band and wave-absorbing in out-of-band dual-band, and has high wave-transparent efficiency.
(5) The wave absorbing units are symmetrical in structure, so that the antenna housing structure formed by periodically arranging the wave absorbing units has the characteristic of insensitive specific polarization.
(6) The invention is manufactured by adopting a PCB process and is easy to process.
Drawings
Fig. 1 is a schematic diagram of a three-dimensional explosive structure of an ultra-thin absorbing radome according to the present invention;
fig. 2 is a front plan view of an ultra-thin absorbing radome in accordance with the present invention;
fig. 3 is a side plan view of an ultra-thin absorbing radome in accordance with the present invention;
fig. 4 is a side view of an ultra-thin absorbing radome in accordance with the present invention;
fig. 5 is a schematic diagram of a three-dimensional explosion structure of an absorption unit of the ultra-thin absorption type radome according to the present invention;
fig. 6 is a side view of an ultra-thin absorbing radome in accordance with the present invention;
fig. 7 is a wave-absorbing effect diagram of the ultra-thin absorption type radome according to the present invention;
fig. 8 is a wave-transparent effect diagram of the ultra-thin absorption type radome according to the present invention.
In the figure: 100. an absorption unit; 110. Upper metal layer; 120. a lower metal layer; 130. a dielectric substrate; 160. a first metal component; 170. a third metal component; 180. a second metal component; 190. a fourth metal component; 150. a first planar spiral structure; 151. a second planar helical structure; 111. a first metal strip; 112. a second metal strip; 113. a third metal strip; 114. a lumped resistance; 115. a welding table; 121. a fourth metal strip; 122. a fifth metal strip.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-8, an ultra-thin absorbing radome, comprising: the antenna cover is a periodic structure formed by the absorption unit 100, so that the antenna cover can realize dual-band absorption of electromagnetic waves outside a band and transmit the electromagnetic waves inside the band; the upper metal layer 110 includes a first metal element 160, the lower metal layer 120 includes a second metal element 180, the first metal element 160 is connected to the second metal element 180 through a metalized via 140, and the first metal element 160 and the second metal element 180 form a first planar spiral structure 150; the first metal assembly 160 is rotated to obtain a third metal assembly 170, and the third metal assembly 170 has the same structure and different size with the first metal assembly 160; the second metal assembly 180 is rotated to obtain a fourth metal assembly 190, the fourth metal assembly 190 has the same structure and different size with the second metal assembly 180, the third metal assembly 170 and the fourth metal assembly 190 form a second planar spiral structure 151, and the first planar spiral structure 150 and the second planar spiral structure 151 work at different wave-absorbing frequencies, have the same structure but different sizes, and work at different out-of-band absorption frequencies.
Further, the first metal element 160 includes a first metal strip 111 having two ends fixedly connected with metal rings, a second metal strip 112 having one end fixedly connected with metal rings, and a third metal strip 113 having two ends fixedly connected with metal rings and a middle end loaded with a lumped resistor 114 and a bonding pad 115.
Further, the second metal assembly 180 includes two fourth metal strips 121 with metal rings fixed to two ends thereof and a fifth metal strip 122 with a metal ring fixed to one end thereof.
Further, the first planar spiral structure 150 and the second planar spiral structure 151 operate at different out-of-band absorption frequencies, the first planar spiral structure 150 operates at a first absorption frequency f1, and the second planar spiral structure 151 operates at a second absorption frequency f2.
Further, the absorption unit 100 includes a first group of planar spiral structures and a second group of planar spiral structures, the first group of planar spiral structures is formed by the first metal components 160 and the third metal components 170 in different arrangements, and the second group of planar spiral structures is formed by the second metal components 180 and the fourth metal components 190 in different arrangements.
Further, the first group of planar spiral structures includes a first metal pattern 160, a second metal pattern 161, a third metal pattern 162, a fourth metal pattern 163, a fifth metal pattern 164, a sixth metal pattern 165, a seventh metal pattern 166, an eighth metal pattern 167, a ninth metal pattern 170, a tenth metal pattern 171, an eleventh metal pattern 172, a twelfth metal pattern 173, a thirteenth metal pattern 174, a fourteenth metal pattern 175, a fifteenth metal pattern 176, and a sixteenth metal pattern 177, the second group of planar spiral structures includes a seventeenth metal pattern 180, an eighteenth metal pattern 181, a nineteenth metal pattern 182, a twentieth metal pattern 183, a twenty-first metal pattern 184, a twenty-second metal pattern 185, a twenty-third metal pattern 186, a twenty-fourth metal pattern 187, a twenty-fifth metal pattern 190, a twenty-sixth metal pattern 191, a twenty-seventh metal pattern 192, a twenty-eighth metal pattern 193, a twenty-ninth metal pattern 194, a thirty-third metal pattern 195, a thirty-first metal pattern 196, a thirty-second metal pattern 190, a thirty-second metal pattern 160, a twenty-sixth metal pattern 191, a twenty-seventh metal pattern 192, a twenty-eighth metal pattern 193, a thirty-second metal pattern 160, a fourth metal pattern 197, a fourth metal pattern 161, a fourth metal pattern and a fourth metal pattern 177, a fourth metal pattern 161 are symmetrically arranged around the same diagonal line 162, and a fourth metal pattern 161, and a fourth metal pattern 162, and a fourth metal pattern 180, and a fourth metal pattern are arranged around the same square unit, and a fourth metal pattern 162, and a square unit is formed by rotating around the same metal pattern, and a square unit; the third metal pattern 162 and the fourth metal pattern 163 are mirror-symmetrical and spaced apart; the fifth metal pattern 164, the sixth metal pattern 165, the seventh metal pattern 166, and the eighth metal pattern 167 are located on the other diagonal line; the fifth metal pattern 164 and the sixth metal pattern 165 are mirror-symmetrical and are arranged at intervals; the seventh metal pattern 166 and the eighth metal pattern 167 are formed by rotating the fifth metal pattern 164 and the sixth metal pattern 165 by 180 degrees around the center point of the square absorption unit; the seventh metal pattern 166 and the eighth metal pattern 167 are mirror-symmetrical and spaced apart; the first metal pattern 160 and the second metal pattern 161 are arranged in a mirror symmetry mode at intervals, the third metal pattern 162 and the fourth metal pattern 163 are arranged in a mirror symmetry mode with a fifth metal pattern 164, a sixth metal pattern 165, a seventh metal pattern 166 and an eighth metal pattern 167 which correspond to the other diagonal line, the ninth metal pattern 170 and the tenth metal pattern 171 are obtained by clockwise rotating the first metal pattern 160 and the second metal pattern 161 by 90 degrees around the central point of the quarter-cycle unit, the patterns are kept unchanged, and the size of the patterns is changed; the eleventh metal pattern 172 and the twelfth metal pattern 173 are obtained by rotating the third metal pattern 162 and the fourth metal pattern 163 by 90 ° clockwise around the central point of the quarter-cycle unit, keeping the patterns unchanged, and changing the size; the thirteenth metal pattern 174 and the fourteenth metal pattern 175 are formed by rotating the fifth metal pattern 164 and the sixth metal pattern 165 by 90 ° counterclockwise around the central point of the quarter-cycle unit, keeping the patterns unchanged, and changing the size; the fifteenth metal pattern 176 and the sixteenth metal pattern 177 are formed by rotating the seventh metal pattern 166 and the eighth metal pattern 167 around the central point of the quarter-cycle unit by 90 ° counterclockwise, keeping the patterns unchanged, and changing the size, and the planar spiral structure cannot be exactly located on the diagonal line by 90 ° and 180 ° in a mirror symmetry manner in some cases, and has a certain angle deflection, which are all covered by this patent.
Further, the first metal pattern 160, the second metal pattern 161, the third metal pattern 162, the fourth metal pattern 163, the fifth metal pattern 164, the sixth metal pattern 165, the seventh metal pattern 166, the eighth metal pattern 167, the ninth metal pattern 170, the tenth metal pattern 171, the eleventh metal pattern 172, the twelfth metal pattern 173, the thirteenth metal pattern 174, the fourteenth metal pattern 175, the fifteenth metal pattern 176, and the sixteenth metal pattern 177 are arranged in the same manner as the corresponding seventeenth metal pattern 180, the eighteenth metal pattern 181, the nineteenth metal pattern 182, the twentieth metal pattern 183, the twenty-first metal pattern 184, the twenty-second metal pattern 185, the twenty-third metal pattern 186, the twenty-fourth metal pattern 187, the twenty-fifth metal pattern 190, the twenty-sixth metal pattern 191, the twenty-seventh metal pattern 192, the twenty-eighth metal pattern 193, the twenty-ninth metal pattern 194, the thirty-third metal pattern 195, the thirty-first metal pattern 196, and the thirty-second metal pattern 197, and are connected by the metalized via 140, eight planar spiral structures working in the first absorption band f1 are distributed along two diagonal lines, corresponding first metal pattern 160, second metal pattern 161, third metal pattern 162, fourth metal pattern 163, fifth metal pattern 164, sixth metal pattern 165, seventh metal pattern 166, eighth metal pattern 167, seventeenth metal pattern 180, eighteenth metal pattern 181, nineteenth metal pattern 182, twentieth metal pattern 183, twenty-first metal pattern 184, twenty-second metal pattern 185, twenty-third metal pattern 186, twenty-fourth metal pattern 187, ninth metal pattern 170, tenth metal pattern 171, and, an eleventh metal pattern 172, a twelfth metal pattern 173, a thirteenth metal pattern 174, a fourteenth metal pattern 175, a fifteenth metal pattern 176, and a sixteenth metal pattern 177, a twenty-fifth metal pattern 190, a twenty-sixth metal pattern 191, a twenty-seventh metal pattern 192, a twenty-eighth metal pattern 193, a twenty-ninth metal pattern 194, a thirty-third metal pattern 195, a thirty-first metal pattern 196, and a thirty-second metal pattern 197.
Further, the first absorption frequency band f 1 And a second absorption band f 2 The frequency bands between the two antenna covers form a pass band of the antenna cover, and any absorption frequency band can be independently controlled by a periodic structure formed by the corresponding eight spiral structures.
Further, the radome has a single-layer structure and double-frequency absorption, and the absorption units 100 form a periodic array by means of m × n arrangement, wherein m is greater than or equal to 1, and n is greater than or equal to 1.
Referring to fig. 5, as shown in the figure, the absorption unit 100 forms a periodic structure capable of transmitting electromagnetic waves in a band and absorbing electromagnetic waves in a dual-band in a band; the main band is operated in a first absorption frequency band f 1 The periodic structure formed by the eight plane spiral structures transmits electromagnetic waves in the band and absorbs the electromagnetic waves outside the band; said secondary loop operating in a second absorption frequency band f 2 The periodic structure formed by the eight plane spiral structures penetrates through the electromagnetic wave in the band and absorbs the electromagnetic wave outside the band; the first absorption band f 1 And a second absorption band f 2 The frequency bands between the two bands form the pass band of the antenna housing, and any absorption frequency band can be independently controlled by a periodic structure formed by the corresponding eight spiral structures.
Further, referring to fig. 1, the radome is generally in the form of a periodic structure, and as shown in the figure, the absorption unit is a periodic structure unit, and the periodic structure is 3 × 3.
Example two
Further, referring to fig. 7-8, the antenna housing has a periodic structure, fig. 7 shows the absorption efficiency of the antenna housing, and the dual-frequency narrow-band absorption of 90% or more is achieved at 2.06GHz and 2.65GHz, fig. 8 shows the transmission efficiency of the antenna housing, and the wave transmission of 90% or more is achieved in the 2.12GHz-2.55GHz band.
The number of devices and the scale of the processes described herein are intended to simplify the description of the invention, and applications, modifications and variations of the invention will be apparent to those skilled in the art.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (3)
1. An ultra-thin absorptive radome, comprising:
the absorption unit (100) comprises a medium substrate (130), an upper metal layer (110) attached to one side face of the medium substrate (130) and a lower metal layer (120) attached to the other side face of the medium substrate (130);
the upper metal layer (110) comprises a first metal component (160), the lower metal layer (120) comprises a second metal component (180), the first metal component (160) is connected with the second metal component (180) through a metalized via (140), and the first metal component (160) and the second metal component (180) form a first planar spiral structure (150);
the first metal component (160) is rotated by 90 degrees to obtain a third metal component (170), and the structure of the third metal component (170) is the same as that of the first metal component (160) and the third metal component is different in size;
the second metal assembly (180) is rotated by 90 degrees to obtain a fourth metal assembly (190), the structure of the fourth metal assembly (190) is the same as that of the second metal assembly (160) and the fourth metal assembly (190) is different in size, and the third metal assembly (170) and the fourth metal assembly (190) form a second planar spiral structure (151);
the first metal component (160) comprises a first metal strip (111) with two ends fixedly connected with metal rings, a second metal strip (112) with one end fixedly connected with the metal rings and a third metal strip (113) with two ends fixedly connected with the metal rings and a middle end loaded with a lumped resistor (114) and a welding table (115);
the second metal component (180) comprises two fourth metal strips (121) of which two ends are fixedly connected with metal rings and a fifth metal strip (122) of which one end is fixedly connected with a metal ring;
the absorption unit (100) comprises a first group of planar spiral structures and a second group of planar spiral structures, wherein the first group of planar spiral structures are formed by first metal components (160) and third metal components (170) which are arranged in different ways, the second group of planar spiral structures are formed by second metal components (180) and fourth metal components (190) which are arranged in different ways, the first group of planar spiral structures comprise a first metal pattern (160), a second metal pattern (161), a third metal pattern (162), a fourth metal pattern (163), a fifth metal pattern (164), a sixth metal pattern (165), a seventh metal pattern (166), an eighth metal pattern (167), a ninth metal pattern (170), a tenth metal pattern (171), an eleventh metal pattern (172), a twelfth metal pattern (173), a thirteenth metal pattern (174), a fourteenth metal pattern (175), a fifteenth metal pattern (176) and a sixteenth metal pattern (177), and the second group of planar spiral structures comprise a seventeenth metal pattern (180), an eighteenth metal pattern (181), a nineteenth metal pattern (182), a twentieth metal pattern (183), a twenty-first metal pattern (184), a twenty-second metal pattern (185), a twenty-third metal pattern (186), a twenty-fourth metal pattern (187), A twenty-fifth metal pattern (190), a twenty-sixth metal pattern (191), a twenty-seventh metal pattern (192), a twenty-eighth metal pattern (193), a twenty-ninth metal pattern (194), a thirty-third metal pattern (195), a thirty-first metal pattern (196) and a thirty-second metal pattern (197), wherein the first metal pattern (160), the second metal pattern (161), the third metal pattern (162) and the fourth metal pattern (163) are positioned on the same diagonal line, the first metal pattern (160) and the second metal pattern (161) are arranged in a mirror symmetry manner at intervals, and the third metal pattern (162) and the fourth metal pattern (163) are obtained by rotating the first metal pattern (160) and the second metal pattern (161) by 180 degrees around the center point of the square absorption unit; the third metal pattern (162) and the fourth metal pattern (163) are in mirror symmetry and are arranged at intervals; the fifth metal pattern (164), the sixth metal pattern (165), the seventh metal pattern (166) and the eighth metal pattern (167) are positioned on the other diagonal line; the fifth metal pattern (164) and the sixth metal pattern (165) are in mirror symmetry and are arranged at intervals; the seventh metal pattern (166) and the eighth metal pattern (167) are obtained by rotating the fifth metal pattern (164) and the sixth metal pattern (165) for 180 degrees around the central point of the square absorption unit; the seventh metal pattern (166) and the eighth metal pattern (167) are arranged in a mirror symmetry manner at intervals; the first metal pattern (160), the second metal pattern (161), the third metal pattern (162) and the fourth metal pattern (163) are in mirror symmetry with the corresponding fifth metal pattern (164), sixth metal pattern (165), seventh metal pattern (166) and eighth metal pattern (167) on the other diagonal;
the ninth metal pattern (170) and the tenth metal pattern (171) are obtained by clockwise rotating the first metal pattern (160) and the second metal pattern (161) by 90 degrees around the central point of the quarter-cycle unit, keeping the patterns unchanged and changing the sizes; the eleventh metal pattern (172) and the twelfth metal pattern (173) are obtained by clockwise rotating the third metal pattern (162) and the fourth metal pattern (163) by 90 degrees around the central point of the quarter-cycle unit, keeping the patterns unchanged and changing the sizes; the thirteenth metal pattern (174) and the fourteenth metal pattern (175) are obtained by rotating the fifth metal pattern (164) and the sixth metal pattern (165) for 90 degrees in a counterclockwise direction around the central point of the quarter-cycle unit, keeping the patterns unchanged and changing the sizes; the fifteenth metal pattern (176) and the sixteenth metal pattern (177) are obtained by rotating the seventh metal pattern (166) and the eighth metal pattern (167) by 90 degrees in a counterclockwise direction around the central point of the quarter-cycle unit, keeping the patterns unchanged and changing the size;
the first metal pattern (160) to the sixteenth metal pattern (177) and the corresponding seventeenth metal pattern (180) to the thirty-second metal pattern (197) are arranged in the same manner, the first metal pattern (160) to the sixteenth metal pattern (177) and the corresponding seventeenth metal pattern (180) to the thirty-second metal pattern (197) are connected through a metalized via hole (140), the first planar spiral structure (150) and the second planar spiral structure (151) work at different out-of-band absorption frequencies, the first planar spiral structure (150) works at a first absorption frequency f1, and the second planar spiral structure (151) works at a second absorption frequency f2.
2. The ultra-thin absorption radome of claim 1, wherein the frequency band between the first absorption frequency band f1 and the second absorption frequency band f2 constitutes a pass band of the radome, and any absorption frequency band can be independently controlled by a periodic structure composed of eight corresponding helical structures.
3. The ultra-thin absorption type radome of claim 1, wherein the radome has a single-layer structure and double-frequency absorption, and the absorption units (100) form a periodic array by m x n arrangement, wherein m is more than or equal to 1, n is more than or equal to 1.
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| CN202011489602.XA CN112821062B (en) | 2020-12-16 | 2020-12-16 | Ultra-thin absorption type antenna house |
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| CN202011489602.XA CN112821062B (en) | 2020-12-16 | 2020-12-16 | Ultra-thin absorption type antenna house |
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| CN103296403B (en) * | 2012-02-29 | 2017-03-29 | 深圳光启创新技术有限公司 | Metamaterial antenna cover and antenna system |
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| CN104993249A (en) * | 2015-07-23 | 2015-10-21 | 中国人民解放军国防科学技术大学 | Single-passband bilateral wave-absorbing composite metamaterial and radome and antenna system including same |
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