CN114449812A - Vehicle-mounted screen with built-in low-orbit satellite communication antenna and manufacturing method thereof - Google Patents
Vehicle-mounted screen with built-in low-orbit satellite communication antenna and manufacturing method thereof Download PDFInfo
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- CN114449812A CN114449812A CN202210123463.1A CN202210123463A CN114449812A CN 114449812 A CN114449812 A CN 114449812A CN 202210123463 A CN202210123463 A CN 202210123463A CN 114449812 A CN114449812 A CN 114449812A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0247—Electrical details of casings, e.g. terminals, passages for cables or wiring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a vehicle-mounted screen with a built-in low-orbit satellite communication antenna and a manufacturing method thereof; the vehicle-mounted screen with the built-in low-orbit satellite communication antenna comprises a vehicle-mounted screen body, a protective cover plate and a low-orbit satellite high-frequency communication antenna, wherein the protective cover plate is arranged on the periphery of the vehicle-mounted screen body; the wire layer is provided with wires with the width of 5-25 mu m, and the interval between the wires is also 5-25 mu m; the substrate is made of a material with low resolution to transparence; the substrate is at least one layer. The invention adopts the conducting wires with the diameter of 5-25 μm, and the interval between the conducting wires is also 5-25 μm, thereby greatly reducing the overall size of the antenna. The huge and heavy dish satellite receiving antenna is changed into a low-orbit satellite antenna with low identification degree, transparence, lightness, portability, high efficiency, stability and competitive price.
Description
Technical Field
The invention relates to a vehicle-mounted screen with an antenna, in particular to a vehicle-mounted screen with a built-in low-orbit satellite communication antenna and a manufacturing method thereof.
Background
With the rapid and vigorous development of 5G communication networks and low-orbit satellites, in areas where optical fiber broadband cannot be laid or 5G stations cannot be constructed, broadband services of high-quality low-orbit satellites play a very critical role, especially in the aspects of military affairs, emergency rescue, unmanned driving, remote medical treatment, geological and hydrological monitoring, remote mountain education and the like.
The receiving antenna of the low-orbit satellite with high quality, high reliability, high portability and competitive price is one of the key factors for determining the commercialization and mass popularization.
The conventional satellite dish has many disadvantages, such as volume, that the conventional passive receiving dish is a metal curved surface, the diameter of the curved surface is generally above 60cm to 120cm, the feed end of the antenna is above 30cm long, and in addition, an additional metal support is required to support the fixed elevation angle and the self weight, so the volume can exceed 60cmx60cmx30 cm. The weight of the antenna metal framework based on the volume can reach more than ten kilograms or dozens of kilograms. If mechanical elevation and free angle scanning are added, the volume and weight are increased. Appearance conventional satellite reception is limited in use arrangement based on volume or weight factors. Opaque metallic entities, visibly apparent. Therefore, the large, heavy, and elevation and free angle rotation-requiring mechanical beam scanning technology, coupled with the high price, directly limits the market development for vehicular, small aircraft and other mobile satellite communications, as well as for mass portable satellite communications.
The inventor searches patent literature with application number CN201910110617.1 AND name a miniaturized ADS-B satellite-borne analog multi-beam receiving antenna according to a search keyword "abstract (satellite AND antenna AND (small or light)) AND specification (low orbit)", AND the patent literature still adopts the traditional structure, AND the size cannot be effectively reduced.
Therefore, the inventor of the present invention has considered that innovative technology is required to design the structure of the antenna so that the size of the antenna can be greatly reduced to realize high frequency communication of low orbit satellites.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a vehicle-mounted screen with a built-in low-orbit satellite communication antenna and a manufacturing method thereof.
The purpose of the invention is realized by the following technical scheme:
the invention discloses a vehicle-mounted screen with a built-in low-orbit satellite communication antenna, which comprises a vehicle-mounted screen body, a protective cover plate and a low-orbit satellite high-frequency communication antenna, wherein the protective cover plate is arranged on the periphery of the vehicle-mounted screen body; the wire layer is provided with wires with the width of 5-25 mu m, and the interval between the wires is also 5-25 mu m; the substrate is made of a material with low resolution to transparence; the substrate is at least one layer.
Preferably, the substrate further comprises a driving circuit disposed on the side of the substrate, the conducting wire has two terminal pins electrically connected to the driving circuit, and a closed loop is formed on the surface of the substrate.
Preferably, the base material has two or more layers or two or more pieces, and the wires of each layer or each piece of base material are connected in series to form a closed antenna loop.
Preferably, the substrate is the ultra-thin glass below 50um of thickness, is equipped with the through-hole that the aperture is less than 60um, and the downthehole wall has the copper facing for the wire on different substrate surfaces is connected.
Preferably, the bearing surface connected with the protective cover plate is a front windshield and a rear windshield of a vehicle, or a vehicle-mounted instrument and a navigation and intelligent interactive center control platform positioned in front of a driving seat.
The invention discloses a manufacturing method of a vehicle-mounted screen with a built-in low-orbit satellite communication antenna, which comprises the processing steps of the low-orbit satellite high-frequency communication antenna, and specifically comprises the following steps:
manufacturing a stainless steel screen, manufacturing a required wire pattern on a stainless steel plate by film sensitization and etching, and forming a screen pattern by sand blasting to manufacture the stainless steel screen;
secondly, taking ultrathin glass with the aperture smaller than 60 mu m, the inner wall of the through hole plated with copper and the thickness of less than 50 mu m as a base material, firstly carrying out ultrasonic and plasma cleaning, then using a stainless steel wire mesh and matching with a high-resolution photosensitive material, and carrying out silk-screen printing on the front surface and the back surface of the base material by using a material containing low-temperature sintered nano silver paste or nano copper paste;
thirdly, sintering and curing the front side and the back side of the substrate to form a conductor layer;
step four, measuring the film thickness and the flatness of the saw teeth, the burrs and the circuits of the conducting wire layer by using a microscope and film thickness measuring equipment, if the measuring result meets the detection standard, putting the base material into an electrolytic bath, and coating a layer of nickel on the surface of the circuit again in an electroplating way so as to achieve the purpose of preventing oxidation; if the measurement result does not meet the detection standard, the vacuum ion beam machine is used for trimming the unqualified edges and burrs on the metal circuit, then the magnetorheological machine is used for polishing the thickness of the metal circuit on the wire layer to achieve the uniform thickness, then the base material is placed into an electrolytic bath, and a layer of nickel is coated on the surface of the circuit again in an electroplating mode to achieve the purpose of preventing oxidation.
Preferably, the wire layer further comprises the following processing steps: and step five, after the electroplating of the base material is finished, finishing the line edge of the wire layer by using a vacuum ion beam machine tool, polishing the surface of the line by using a magneto-rheological machine tool, and measuring signals.
Preferably, the method further comprises a binding step, wherein the binding step comprises the following processing steps: and step six, finishing the binding process of the base material and the FPC board provided with the control chip and the circuit in the step five through the FPC flat cable and the ACF anisotropic conductive adhesive film, and finishing the processing of the whole low-orbit satellite high-frequency communication antenna.
Preferably, the base material is more than two layers, and the method further comprises the following attaching step: and step seven, packaging the substrate which is drilled with the through hole and plated with copper in the inner wall of the hole together in a plane full-lamination mode.
Preferably, the method further comprises the following steps: and step eight, attaching the low-orbit satellite high-frequency communication antenna completed in the step seven to the back surface of the protective cover plate of the vehicle-mounted screen of the curved surface in a curved surface full-laminating mode in a manner of curved surface full-laminating equipment and a curved surface cover plate fixing jig.
Compared with the prior art, the invention has the beneficial effects that: the invention adopts the conducting wires with the diameter of 5-25 μm, and the interval between the conducting wires is also 5-25 μm, thereby greatly reducing the overall size of the antenna. The huge and heavy dish satellite receiving antenna is changed into a low-orbit satellite antenna with low identification degree, transparence, lightness, portability, high efficiency, stability and competitive price. Through the innovative screen printing and silk-screen printing technology and the material capable of sintering the nano silver paste or the nano copper paste at low temperature, and the innovative production process and the electronic scanning technology, the dish-shaped antenna needing continuous rotation scanning is changed into an ultrathin fixed antenna with low identification degree to transparence, plane or curved surface, the difficulty of antenna installation is greatly reduced, and the portable antenna has good portability. Furthermore, the cost of the low-orbit satellite antenna can be greatly reduced through innovative material technology and special process method. The vehicle-mounted screen with the built-in low-orbit satellite communication antenna greatly improves the product value and competitiveness, makes great contribution to the fields of intelligent automobile and vehicle networking and unmanned driving, and provides an important step for real unmanned driving (fifth level).
Drawings
FIG. 1 is a schematic diagram of a vehicle-mounted screen with a built-in low-orbit satellite communication antenna according to the present invention;
FIG. 2 is an exploded perspective view of the low-orbit satellite high-frequency communication antenna of the embodiment of FIG. 1;
fig. 3 is a schematic plan view and a partial enlarged view of a low-orbit satellite high-frequency communication antenna according to another embodiment of the invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely by the following embodiments, which are only a part of the embodiments of the present invention, but not all of them. 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.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the embodiments of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the invention. As used in the description of embodiments of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It is emphasized that the structure in the drawings is schematically shown after being enlarged, and the enlargement scale of each department is different, so as to more clearly express the structural principle of the device in work.
As shown in fig. 1 to 2, the vehicle-mounted screen with the built-in low-orbit satellite communication antenna of the invention comprises a vehicle-mounted screen body 1, a protective cover plate 2 arranged on the periphery of the vehicle-mounted screen body 1, and a low-orbit satellite high-frequency communication antenna 3 arranged on the back surface (or the back surface of the protective cover plate) of the vehicle-mounted screen body 1, wherein the low-orbit satellite high-frequency communication antenna 3 comprises a base material 30 and a conductor layer 31 arranged on the front surface and the back surface of the base material 30, and the conductor layer 31 is used for receiving low-orbit satellite signals; the wire layer 31 is provided with wires with the width of 5-25 μm, and the interval between the wires is also 5-25 μm; the substrate 30 is a low resolution to transparent material; the substrate is at least one layer.
The device further comprises a driving circuit 33 arranged on the side of the substrate, the conducting wire is provided with two terminal pins electrically connected with the driving circuit, and a closed loop is formed on the surface of the substrate. Wherein, substrate 30 can be the ultra-thin glass below 50um of thickness, is equipped with the through-hole that the aperture is less than 60um, and the downthehole wall has the copper facing for the wire on different substrate surfaces is connected.
During specific installation, the bearing surface connected with the protective cover plate 2 can be a front windshield and a rear windshield of a vehicle, or a vehicle-mounted instrument and a navigation and intelligent interactive center control platform positioned in front of a driving seat.
Fig. 3 is a schematic plan view and a partial enlarged view of a low-orbit satellite high-frequency communication antenna according to another embodiment of the invention, showing a specific shape of a conductor layer. The grid area is coated with nano silver paste or nano copper paste.
In other embodiments, the substrate may have two or more layers, and the wires of each layer or each substrate are connected in series to form a closed antenna loop.
The invention discloses a manufacturing method of a vehicle-mounted screen with a built-in low-orbit satellite communication antenna, which comprises the processing steps of the low-orbit satellite high-frequency communication antenna, and specifically comprises the following steps:
manufacturing a stainless steel screen, manufacturing a required wire pattern on a stainless steel plate by film sensitization and etching, and forming a screen pattern by sand blasting to manufacture the stainless steel screen; the sandblasting treatment can suppress halation generated during plate making, improve plate making resolution, and improve print paste permeability by improving print paste wettability.
Secondly, taking ultrathin glass with the aperture smaller than 60 mu m, the inner wall of the through hole plated with copper and the thickness of less than 50 mu m as a base material, firstly carrying out ultrasonic and plasma cleaning, then using a stainless steel wire mesh and matching with a high-resolution photosensitive material, and carrying out silk-screen printing on the front surface and the back surface of the base material by using a material containing low-temperature sintered nano silver paste or nano copper paste;
thirdly, sintering and curing the front side and the back side of the substrate to form a conductor layer;
step four, measuring the film thickness and the flatness of the saw teeth, the burrs and the circuits of the conducting wire layer by using a microscope and film thickness measuring equipment, if the measuring result meets the detection standard, putting the base material into an electrolytic bath, and coating a layer of nickel on the surface of the circuit again in an electroplating way so as to achieve the purpose of preventing oxidation; if the measurement result does not meet the detection standard, the vacuum ion beam machine is used for trimming the unqualified edges and burrs on the metal circuit, then the magnetorheological machine is used for polishing the thickness of the metal circuit on the wire layer to achieve the uniform thickness, then the base material is placed into an electrolytic bath, and a layer of nickel is coated on the surface of the circuit again in an electroplating mode to achieve the purpose of preventing oxidation.
The sand blasting treatment comprises the following steps: the abrasive is sprayed together with a medium onto the surface of the stainless steel, and the surface is abraded by colliding with the surface of the stainless steel. As the medium used in the blasting process, air or water is generally used, and among them, air is preferably used as the medium.
Abrasive particles (abrasives) sprayed in the sand spraying process, plastic, glass, carbon random, alumina, silica alumina and the like. The particle size of the abrasive is generally 20-4000 mesh, preferably 100-2000 mesh.
Second, the pressure of the abrasive jet as the grinding condition is generally 0.05 to 0.7MPa, preferably 0.1 to 0.5MPa, under air pressure. The blasting process is usually performed at room temperature, but may be performed under heating. The time for the blasting process, when the area is 200mm × 200mm, is usually about 5 to 300 seconds, preferably about 20 to 150 seconds.
Thirdly, by grinding the shape of the grooves in this way, the surface of the stainless steel has innumerable grooves with a roughness of 0.05-20 μm, which may be a pear-blossom or wave-like pattern, as viewed from the entire surface of the stainless steel.
More specifically, the wire layer further comprises the following processing steps: and step five, after the electroplating of the base material is finished, finishing the line edge of the wire layer by using a vacuum ion beam machine tool, polishing the surface of the line by using a magneto-rheological machine tool, and measuring signals.
More specifically, the method further comprises a binding step, wherein the binding step comprises the following processing steps:
and step six, finishing the binding process of the base material and the FPC board provided with the control chip and the circuit in the step five through the FPC flat cable and the ACF anisotropic conductive adhesive film, and finishing the processing of the whole low-orbit satellite high-frequency communication antenna.
More specifically, the base material is more than two layers, and the method further comprises the following attaching step: and step seven, packaging the substrate which is drilled with the through hole and plated with copper in the inner wall of the hole together in a plane full-lamination mode.
More specifically, the method further comprises the following steps: and step eight, attaching the low-orbit satellite high-frequency communication antenna completed in the step seven to the back surface of the protective cover plate of the vehicle-mounted screen of the curved surface in a curved surface full-laminating mode in a manner of curved surface full-laminating equipment and a curved surface cover plate fixing jig.
In summary, the invention employs 5-25 μm conductive wires, and the spacing between the conductive wires is also 5-25 μm, so as to greatly reduce the overall size of the antenna. The huge and heavy dish satellite receiving antenna is changed into a low-orbit satellite antenna with low identification degree, transparence, lightness, portability, high efficiency, stability and competitive price. Through the innovative screen printing and silk-screen printing technology and the material capable of sintering the nano silver paste or the nano copper paste at low temperature, and the innovative production process and the electronic scanning technology, the dish-shaped antenna needing continuous rotation scanning is changed into an ultrathin fixed antenna with low identification degree to transparence, plane or curved surface, the difficulty of antenna installation is greatly reduced, and the portable antenna has good portability. Furthermore, the cost of the low-orbit satellite antenna can be greatly reduced through innovative material technology and special process method. The vehicle-mounted screen with the built-in low-orbit satellite communication antenna not only greatly improves the product value and competitiveness, but also makes great contribution to the field of intelligent automobile and vehicle networking and unmanned driving, and provides an important step for real unmanned driving (fifth level).
The technical contents of the present invention are further illustrated by the examples only for the convenience of the reader, but the embodiments of the present invention are not limited thereto, and any technical extension or re-creation based on the present invention is protected by the present invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. The vehicle-mounted screen with the built-in low-orbit satellite communication antenna comprises a vehicle-mounted screen body, a protective cover plate and a low-orbit satellite high-frequency communication antenna, wherein the protective cover plate is arranged on the periphery of the vehicle-mounted screen body; the wire layer is provided with wires with the width of 5-25 mu m, and the interval between the wires is also 5-25 mu m; the substrate is made of a material with low resolution to transparence; the substrate is at least one layer.
2. The vehicular screen of claim 1, further comprising a driving circuit disposed on a side of the substrate, wherein the conductive wire has two terminal pins electrically connected to the driving circuit, and a closed loop is formed on the surface of the substrate.
3. The vehicle screen of claim 2, wherein the substrate has two or more layers, and the wires of each layer or each substrate are connected in series to form a closed antenna loop.
4. The vehicular screen of claim 3, wherein the substrate is ultra-thin glass with a thickness of 50um or less, and has through holes with a diameter of less than 60um, and the inner walls of the through holes are plated with copper for connecting wires on the surfaces of different substrates.
5. The vehicular screen with built-in low-orbit satellite communication antenna of claim 4, wherein the bearing surface connected with the protective cover plate is a front windshield, a rear windshield, or a central control platform for vehicle instruments, navigation and intelligent interaction in front of the driver's seat.
6. The method for manufacturing the vehicle-mounted screen with the built-in low-orbit satellite communication antenna as claimed in any one of claims 1 to 5, which is characterized by comprising the following processing steps of the low-orbit satellite high-frequency communication antenna:
manufacturing a stainless steel screen, manufacturing a required wire pattern on a stainless steel plate by film sensitization and etching, and forming a screen pattern by sand blasting to manufacture the stainless steel screen;
secondly, taking ultrathin glass with the aperture smaller than 60 mu m, the inner wall of the through hole plated with copper and the thickness of less than 50 mu m as a base material, firstly carrying out ultrasonic and plasma cleaning, then using a stainless steel wire mesh and matching with a high-resolution photosensitive material, and carrying out silk-screen printing on the front surface and the back surface of the base material by using a material containing low-temperature sintered nano silver paste or nano copper paste;
thirdly, sintering and curing the front side and the back side of the substrate to form a conductor layer;
step four, measuring the film thickness and the flatness of the saw teeth, the burrs and the circuits of the conducting wire layer by using a microscope and film thickness measuring equipment, if the measuring result meets the detection standard, putting the base material into an electrolytic bath, and coating a layer of nickel on the surface of the circuit again in an electroplating way so as to achieve the purpose of preventing oxidation; if the measurement result does not meet the detection standard, the vacuum ion beam machine is used for trimming the unqualified edges and burrs on the metal circuit, then the magnetorheological machine is used for polishing the thickness of the metal circuit on the wire layer to achieve the uniform thickness, then the base material is placed into an electrolytic bath, and a layer of nickel is coated on the surface of the circuit again in an electroplating mode to achieve the purpose of preventing oxidation.
7. The method of manufacturing according to claim 6, wherein the wire layer further comprises the processing steps of:
and step five, after the electroplating of the base material is finished, the line edge of the conducting wire layer is required to be trimmed by using a vacuum ion beam machine, the surface of the line is polished by using a magneto-rheological machine, and the signal measurement work is required.
8. The manufacturing method according to claim 7, further comprising a binding step, the binding step comprising the processing steps of:
and step six, finishing the binding process of the base material and the FPC board provided with the control chip and the circuit in the step five through the FPC flat cable and the ACF anisotropic conductive adhesive film, and finishing the processing of the whole low-orbit satellite high-frequency communication antenna.
9. The method according to claim 8, wherein the base material has two or more layers, and further comprising the step of:
and step seven, packaging the substrate which is drilled with the through hole and plated with copper in the inner wall of the hole together in a plane full-lamination mode.
10. The manufacturing method according to claim 9, characterized by further comprising the steps of:
and step eight, attaching the low-orbit satellite high-frequency communication antenna completed in the step seven to the back surface of the protective cover plate of the vehicle-mounted screen of the curved surface in a curved surface full-laminating mode in a manner of curved surface full-laminating equipment and a curved surface cover plate fixing jig.
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| CN202210123463.1A CN114449812B (en) | 2022-02-10 | 2022-02-10 | Manufacturing method of vehicle-mounted screen of built-in low-orbit satellite communication antenna |
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| CN202210123463.1A CN114449812B (en) | 2022-02-10 | 2022-02-10 | Manufacturing method of vehicle-mounted screen of built-in low-orbit satellite communication antenna |
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| JP3211259U (en) * | 2017-04-20 | 2017-06-29 | 日本エレクトロニクス・サービス株式会社 | RFID data carrier for car individual management |
| CN109904594A (en) * | 2019-02-12 | 2019-06-18 | 上海航天电子有限公司 | A kind of spaceborne simulation multi-beam receiving antenna of miniaturization ADS-B |
| CN110212294A (en) * | 2019-06-04 | 2019-09-06 | 深圳市环波科技有限责任公司 | A kind of transparent antenna based on narrow linewidth conductive pattern |
| CN110401035A (en) * | 2019-07-17 | 2019-11-01 | 上海汽车集团股份有限公司 | A kind of vehicle-mounted antenna system with FM band radiation cellular antenna isolator |
| CN113097697A (en) * | 2019-12-23 | 2021-07-09 | 上海华测导航技术股份有限公司 | High-precision satellite navigation and communication combined antenna based on new material |
| JP2021129220A (en) * | 2020-02-13 | 2021-09-02 | 旭化成株式会社 | Transparent antenna and RF tag |
| CN213989197U (en) * | 2020-12-11 | 2021-08-17 | 深圳市维力谷无线技术股份有限公司 | Vehicle-mounted satellite antenna |
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