CN113782963A - Millimeter wave antenna housing with electromagnetic shielding function and manufacturing method thereof - Google Patents
Millimeter wave antenna housing with electromagnetic shielding function and manufacturing method thereof Download PDFInfo
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- CN113782963A CN113782963A CN202111072513.XA CN202111072513A CN113782963A CN 113782963 A CN113782963 A CN 113782963A CN 202111072513 A CN202111072513 A CN 202111072513A CN 113782963 A CN113782963 A CN 113782963A
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- copper foil
- composite material
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- millimeter wave
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000002131 composite material Substances 0.000 claims abstract description 45
- 239000011889 copper foil Substances 0.000 claims abstract description 42
- 239000002184 metal Substances 0.000 claims abstract description 39
- 229910052751 metal Inorganic materials 0.000 claims abstract description 39
- 238000005476 soldering Methods 0.000 claims abstract description 21
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000004744 fabric Substances 0.000 claims description 41
- 239000010453 quartz Substances 0.000 claims description 36
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 13
- 238000012360 testing method Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 7
- 239000004843 novolac epoxy resin Substances 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 239000011888 foil Substances 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000004381 surface treatment Methods 0.000 claims description 3
- 229910000679 solder Inorganic materials 0.000 claims 1
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 12
- 238000003466 welding Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003897 fog Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Images
Classifications
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/526—Electromagnetic shields
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The embodiment of the invention provides a millimeter wave antenna housing with an electromagnetic shielding function and a manufacturing method thereof, relates to the technical field of antenna housings and manufacturing methods thereof, and aims to improve the stealth and wave-transmitting performance of the antenna housing. The antenna housing sequentially comprises from inside to outside: the composite material layer comprises an inner composite material layer, a shielding metal grid, a double-sided conductive copper foil and an outer composite material layer; the composite material layers on the inner side and the outer side are formed by alternately laying the cut composite materials; the metal shielding grid is formed by metal wires; and laying a double-sided conductive copper foil on the inner composite material layer for a circle, hanging soldering tin points, and laying the shielding metal grid on the double-sided conductive copper foil.
Description
Technical Field
The invention relates to the technical field of antenna covers and manufacturing methods thereof, in particular to a millimeter wave antenna cover with an electromagnetic shielding function and a manufacturing method thereof.
Background
The millimeter-level electromagnetic wave detection equipment can capture, position and track a target, and control a guided weapon to fly to the target to realize guidance. The millimeter wave guidance has the advantages of microwave guidance and infrared guidance. The guidance system has small volume, light weight, easy high integration, wide frequency band and high resolution, is difficult to intercept and interfere by an opposite party, has strong anti-jamming capability and capability of distinguishing moving targets from background clutter, has good speed discrimination on the targets, has strong capability of passing smoke, fog, dust and haze, and has better all-weather fighting capability.
However, in the guided missile of millimeter wave instruction guidance, millimeter wave beam guidance and millimeter wave semi-active guidance, the target must be continuously tracked and irradiated by the radar in the flight process, so the survivability is poor, and the application is limited, so that the guided weapon applying the millimeter wave antenna has electromagnetic shielding stealth capability in other wave bands, and has maximum power and maximum transmittance in millimeter wave bands.
Disclosure of Invention
In order to solve the technical problems, the invention provides a millimeter wave antenna housing with an electromagnetic shielding function and a manufacturing method thereof, and aims to improve the stealth and wave-transmitting performance of the antenna housing.
The utility model provides a millimeter wave antenna house with electromagnetic shield function, the antenna house includes from inside to outside in proper order: the composite material layer comprises an inner composite material layer, a shielding metal grid, a double-sided conductive copper foil and an outer composite material layer; the composite material layers on the inner side and the outer side are formed by alternately laying the cut composite materials; the metal shielding grid is formed by metal wires; and laying a double-sided conductive copper foil on the inner composite material layer for a circle, hanging soldering tin points, and laying the shielding metal grid on the double-sided conductive copper foil.
The inner composite material layer is formed by annularly cut quartz fabric and liquid bisphenol A type or solid bisphenol A type or novolac epoxy resin prepreg.
Preferably, the outer composite material layer is formed by petal-shaped cut quartz fabric and liquid bisphenol A type or solid bisphenol A type or novolac epoxy resin prepreg.
The double-sided conductive copper foil is positioned by using a positioning die, and the surface of the double-sided conductive copper foil is provided with interval marks; the interval of the interval marks is within the range of 8mm-12mm, and the distance between the lower edge of the double-sided conductive copper foil and the top of the antenna housing is 110 mm.
Preferably, the shielding metal grid is laid on the double-sided conductive copper foil according to the positions of the soldering tin points.
Wherein, the outer composite material layer is formed by laying composite materials according to the joint crossing angle of 90 degrees.
Preferably, the ring-cut quartz fabric is laid 6 layers.
The petal-shaped cut quartz fabrics are laid in 8 layers, and seams between each layer of quartz fabric and the upper layer of quartz fabric are overlapped in a 90-degree staggered mode.
Preferably, the shielding metal grid is a metal wire transverse and longitudinal grid, the distance between the grids is 8mm-12mm, and the resistance of any two points of the grids is less than or equal to 0.5 omega.
A manufacturing method of a millimeter wave antenna housing with an electromagnetic shielding function adopts the antenna housing and comprises the following steps:
the method comprises the following steps: preparing quartz prepreg cloth, shielding metal wires, copper foils and soldering wires and inspecting;
step two: designing a forming die and processing;
step three: cutting the quartz prepreg cloth into petal shapes and girdle bands;
step four: dressing: laying 5 layers of petal-shaped quartz prepreg cloth and six layers of girdle quartz prepreg cloth on the forming die;
step five: laying a shielding grid: laying a 10mm-20mm double-sided copper foil for one circle, wherein the height of the lower edge of the copper foil from the top of the radome is 110mm, positioning the radome surface by using a positioning die, marking the corresponding position of the copper foil at intervals of 8mm-12mm, hanging tin on the marking point of the copper foil, and taking the covered metal wire as a standard for soldering tin points; laying transverse and longitudinal grids of shielding metal wires, wherein the space between the grids is 8mm-12 mm;
cleaning the soldering points by adopting alcohol, wherein the soldering points are covered by the double-sided copper conducting foil for one circle;
step six: secondary compress: 3 layers of petal prepreg cloth are coated and are in 90-degree staggered lap joint with the seam between the upper layer of cloth;
step seven: curing and forming: sealing the antenna housing by adopting a vacuum bag, curing under the conditions of certain temperature and certain pressure, and demolding and molding;
step eight: carrying out surface treatment on the antenna housing: polishing and spraying paint;
step nine: carrying out wave-transparent function test;
step ten: and (5) performing electromagnetic shielding function test.
The invention provides a millimeter wave antenna housing with an electromagnetic shielding function and a manufacturing method thereof, wherein the manufacturing method comprises the following steps: cutting quartz petals and girdle strips made of composite materials; laying composite material on the mould as the antenna cover shell and the shielding metal grid; sealing a vacuum bag, curing at high temperature and high pressure, and demolding and molding; and (5) carrying out wave-transparent function and electromagnetic shielding function tests and verifying the shielding performance. The antenna housing can improve the standardization and the reliability of the antenna housing; and provides a test method for testing the performance of the antenna housing. The antenna housing for the guided weapon integrates stealth and wave-transmitting performance, and overcomes the defect that the antenna emits millimeter waves and is easy to detect by a local radar; and the antenna still has better permeability in a millimeter wave band, so that the detection effect of the antenna in the antenna housing is ensured. After the quartz fabric prepreg cloth material is matched with the die, the processes of curing, polishing and the like are carried out, so that the radome is stable in structure, light and easy to install, and the problems of complex process, high cost and the like when the radome is required to be manufactured according to weapons of different specifications are solved.
Drawings
Fig. 1 is a schematic structural diagram of a millimeter wave radome with an electromagnetic shielding function according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
Referring to fig. 1, an embodiment of the present invention provides a millimeter wave antenna housing with an electromagnetic shielding function, where the antenna housing sequentially includes, from inside to outside: the composite material layer comprises an inner composite material layer 3, a shielding metal grid 2, a double-sided conductive copper foil 4 and an outer composite material layer 1; the composite materials cut from the inner composite material layer 3 and the outer composite material layer 1 are alternately laid; the metal shielding grid 2 is made of metal wires; and a double-sided conductive copper foil 4 is laid on the inner composite material layer 3 for a circle, soldering tin points are hung, and the shielding metal grid 2 is laid on the double-sided conductive copper foil 4.
The invention provides a millimeter wave antenna housing with an electromagnetic shielding function and a manufacturing method thereof, wherein quartz petals and a girdle band made of composite materials are cut; laying composite material on the mould as the antenna cover shell and the shielding metal grid; sealing a vacuum bag, curing at high temperature and high pressure, and demolding and molding; and (5) carrying out wave-transparent function and electromagnetic shielding function tests and verifying the shielding performance. The antenna housing disclosed by the invention is prepared by matching a quartz fabric prepreg material with a mould and then carrying out processes such as curing and polishing, so that the antenna housing is stable in structure, light and easy to install, and the problems of complex process, high cost and the like when the antenna housing is manufactured according to different specifications of weapons are solved.
In the above embodiment, the inner composite material layer 3 is formed by annularly cut quartz fabric and liquid bisphenol a type or solid bisphenol a type or novolac epoxy resin prepreg.
In the above embodiment, the outer composite material layer 1 is made of a petal-shaped cut quartz fabric and a liquid bisphenol a type or solid bisphenol a type or novolac epoxy resin prepreg.
The structure formed by the quartz fabric and the liquid bisphenol A type or solid bisphenol A type or novolac epoxy resin prepreg has the advantages of high rigidity, reliable structure and smaller weight.
In the above embodiment, the double-sided conductive copper foil 4 is positioned by using a positioning mold to ensure the position accuracy. The surface of the double-sided conductive copper foil 4 is provided with interval marks; the position is convenient to identify, the interval of the interval marks is within the range of 8mm-12mm, and the lower edge of the double-sided conductive copper foil 4 is 110mm away from the top of the antenna housing. Tin is hung on the identification points of the double-sided conductive copper foil 4, and the tin soldering points are not easy to be too many based on covering metal wires. The welding spot is as flat and thin as possible, and the welding spot is cleaned by alcohol.
In the above embodiment, the shielding metal grid 2 is laid on the double-sided conductive copper foil 4 according to the positions of the soldering points.
The outer composite material layer 1 is formed by laying composite materials according to the joint intersection angle of 90 degrees. And laying the shielding metal grid 2 on the double-sided conductive copper foil 4 according to the positioning of the soldering tin points. The number of layers, the thickness and the size of the inner composite material layer 3 and the outer composite material layer 1 of the antenna housing can be freely designed according to a specific carrying platform.
In the above embodiment, the ring-cut quartz fabric was laid 6 layers. The petal-shaped cut quartz fabrics are laid in 8 layers, and seams between each layer of quartz fabric and the upper layer of quartz fabric are overlapped in a 90-degree staggered mode. The shielding metal grid 2 is a metal wire transverse and longitudinal grid, the distance between the grids is 8mm-12mm, and the resistance of any two points of the grids is less than or equal to 0.5 omega.
The embodiment of the invention also provides a manufacturing method of the millimeter wave antenna housing with the electromagnetic shielding function, the method adopts the antenna housing, and the method comprises the following steps:
the method comprises the following steps: preparing quartz prepreg cloth, shielding metal wires, copper foils and soldering wires and inspecting; purchasing and inspecting raw materials, namely composite quartz prepreg cloth, shielding metal wires, copper foils and soldering tin wires, to determine whether the raw materials are qualified;
step two: designing a forming die and processing; designing a forming die and machining according to the specification of the seeker;
step three: cutting the quartz prepreg cloth into petal shapes and girdle bands;
step four: dressing: laying 5 layers of petal-shaped quartz prepreg cloth and 6 layers of girdle quartz prepreg cloth on the forming die;
step five: laying a shielding grid: laying a 10mm-20mm double-sided copper foil for one circle, wherein the height of the lower edge of the copper foil from the top of the radome is 110mm, positioning the radome surface by using a positioning die, marking the corresponding position of the copper foil at intervals of 8mm-12mm, hanging tin on the marking point of the copper foil, and taking the covered metal wire as a standard for soldering tin points; not too much. Laying transverse and longitudinal grids of shielding metal wires, wherein the space between the grids is 8mm-12 mm; the welding spots are as flat and thin as possible, the welding spots are cleaned by alcohol, the resistance of any two points of the shielding grid is less than or equal to 0.5 omega, and the welding spots are covered by the double-sided copper conducting foil for one circle;
cleaning the soldering points by adopting alcohol, wherein the soldering points are covered by the double-sided copper conducting foil for one circle;
step six: secondary compress: 3 layers of petal prepreg cloth are coated and are in 90-degree staggered lap joint with the seam between the upper layer of cloth;
step seven: curing and forming: sealing the antenna housing by adopting a vacuum bag, curing under the conditions of certain temperature and certain pressure, curing at high temperature and high pressure, and demolding and molding;
step eight: carrying out surface treatment on the antenna housing: polishing and spraying paint;
step nine: carrying out wave-transparent function test; and by adopting a far field measurement method, an antenna matched with the antenna housing is arranged on the turntable, the transmitting assembly is started, and the receiving antenna is elevated and connected with the receiver. Under far field conditions, the receiving antenna is more than 14 meters from the transmitting antenna. The signal received by the receiver is transmitted back to the control room through the communication equipment, the computer automatically reads the level data, and the turntable is adjusted to stay at the level peak value of the directional diagram of the receiving antenna;
step ten: and (4) performing an electromagnetic shielding function test, and performing the test by adopting an electromagnetic shielding effectiveness coaxial method.
It will be evident to those skilled in the art that the embodiments of the present invention are not limited to the details of the foregoing illustrative embodiments, and that the embodiments of the present invention are capable of being embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the embodiments being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. Several units, modules or means recited in the system, apparatus or terminal claims may also be implemented by one and the same unit, module or means in software or hardware. The terms first, second, etc. are used to denote names, but not any particular order.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the embodiments of the present invention and not for limiting, and although the embodiments of the present invention are described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the embodiments of the present invention without departing from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a millimeter wave antenna house with electromagnetic shield function which characterized in that, the antenna house includes from inside to outside in proper order: the composite material layer comprises an inner composite material layer, a shielding metal grid, a double-sided conductive copper foil and an outer composite material layer; the inner composite material layer and the outer composite material layer are formed by alternately laying cut composite materials; the metal shielding grid is formed by metal wires; and laying a double-sided conductive copper foil on the inner composite material layer for a circle, hanging soldering tin points, and laying the shielding metal grid on the double-sided conductive copper foil.
2. The millimeter wave radome with the electromagnetic shielding function according to claim 1, wherein the inner composite material layer is formed by annularly cut quartz fabric and liquid bisphenol a type or solid bisphenol a type or novolac epoxy resin prepreg.
3. The millimeter wave radome with the electromagnetic shielding function according to claim 1, wherein the outer composite material layer is formed by petal-shaped cut quartz fabric and liquid bisphenol a type or solid bisphenol a type or novolac epoxy resin prepreg.
4. The millimeter wave radome with the electromagnetic shielding function according to claim 1, wherein the double-sided conductive copper foil is positioned by using a positioning mold, and space marks are arranged on the surface of the double-sided conductive copper foil; the interval of the interval marks is more than or equal to 8 millimeters and less than or equal to 12 millimeters, and the distance between the lower edge of the double-sided conductive copper foil and the top of the antenna housing is more than or equal to 105 millimeters and less than or equal to 115 millimeters.
5. The millimeter wave radome with the electromagnetic shielding function according to claim 1, wherein the shielding metal mesh is laid on the double-sided conductive copper foil according to the position of the solder point.
6. The millimeter wave radome with the electromagnetic shielding function according to claim 1, wherein the outer composite material layer is made of composite materials and is laid according to the joint intersection angle of 90 degrees.
7. The millimeter wave radome having an electromagnetic shielding function according to claim 2, wherein the ring-cut quartz fabric is laid with 6 layers.
8. The millimeter wave radome with the electromagnetic shielding function according to claim 3, wherein the petal-shaped cut quartz fabrics are laid in 8 layers, and seams between each layer of quartz fabric and the upper layer of quartz fabric are overlapped in a 90-degree staggered mode.
9. The millimeter wave radome with the electromagnetic shielding function according to claim 1 or 5, wherein the shielding metal mesh is a metal wire transverse and longitudinal mesh, the mesh spacing is greater than or equal to 8mm and less than or equal to 12mm, and the resistance between any two points of the mesh is less than or equal to 0.5 Ω.
10. A method for manufacturing a millimeter wave radome having an electromagnetic shielding function, wherein the method employs the radome of any one of claims 1 to 9, and comprises the following steps:
the method comprises the following steps: preparing quartz prepreg cloth, shielding metal wires, copper foils and soldering wires and inspecting;
step two: designing a forming die and processing;
step three: cutting the quartz prepreg cloth into petal shapes and girdle bands;
step four: dressing: laying 5 layers of petal-shaped quartz prepreg cloth and 6 layers of girdle quartz prepreg cloth on the forming die;
step five: laying a shielding grid: laying a 10mm-20mm double-sided copper foil for one circle, wherein the height of the lower edge of the copper foil from the top of the radome is 110mm, positioning the radome surface by using a positioning die, marking the corresponding position of the copper foil at intervals of 8mm-12mm, hanging tin on the marking point of the copper foil, and taking the covered metal wire as a standard for soldering tin points; laying transverse and longitudinal grids of shielding metal wires, wherein the space between the grids is 8mm-12 mm;
cleaning the soldering points by adopting alcohol, wherein the soldering points are covered by the double-sided copper conducting foil for one circle;
step six: secondary compress: 3 layers of petal prepreg cloth are coated and are in 90-degree staggered lap joint with the seam between the upper layer of cloth;
step seven: curing and forming: sealing the antenna housing by adopting a vacuum bag, curing under the conditions of certain temperature and certain pressure, and demolding and molding;
step eight: carrying out surface treatment on the antenna housing: polishing and spraying paint;
step nine: carrying out wave-transparent function test;
step ten: and (5) performing electromagnetic shielding function test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111072513.XA CN113782963B (en) | 2021-09-14 | 2021-09-14 | Millimeter wave radome with electromagnetic shielding function and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111072513.XA CN113782963B (en) | 2021-09-14 | 2021-09-14 | Millimeter wave radome with electromagnetic shielding function and manufacturing method thereof |
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| Publication Number | Publication Date |
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| CN113782963A true CN113782963A (en) | 2021-12-10 |
| CN113782963B CN113782963B (en) | 2024-04-02 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007142125A1 (en) * | 2006-06-02 | 2007-12-13 | Mitsubishi Cable Industries, Ltd. | Radio wave shielding partitioning plane material and method for manufacturing same |
| US20100194661A1 (en) * | 2009-01-30 | 2010-08-05 | Raytheon Company | Composite radome and radiator structure |
| CN110808464A (en) * | 2018-08-06 | 2020-02-18 | 航天特种材料及工艺技术研究所 | Wave-transparent/stealth integrated metamaterial structure and antenna housing and antenna window with same |
| CN112968283A (en) * | 2021-02-05 | 2021-06-15 | 北方长龙新材料技术股份有限公司 | Radome with wave-transmitting, stealth and bulletproof functions and forming process thereof |
-
2021
- 2021-09-14 CN CN202111072513.XA patent/CN113782963B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007142125A1 (en) * | 2006-06-02 | 2007-12-13 | Mitsubishi Cable Industries, Ltd. | Radio wave shielding partitioning plane material and method for manufacturing same |
| US20100194661A1 (en) * | 2009-01-30 | 2010-08-05 | Raytheon Company | Composite radome and radiator structure |
| CN110808464A (en) * | 2018-08-06 | 2020-02-18 | 航天特种材料及工艺技术研究所 | Wave-transparent/stealth integrated metamaterial structure and antenna housing and antenna window with same |
| CN112968283A (en) * | 2021-02-05 | 2021-06-15 | 北方长龙新材料技术股份有限公司 | Radome with wave-transmitting, stealth and bulletproof functions and forming process thereof |
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| CN113782963B (en) | 2024-04-02 |
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