Countermeasures for Wireless LAN Network Interference in the 5G Era: Composite Use of Non-combustible Aluminum Sheets + Radio Wave Absorbing Body Box / Heat Insulating Transparent Electromagnetic Wave Shielding Film Examples.
1) "Wireless LAN Access Point Storage Box" - Controls the direction of radio wave emission to prevent interference and avoids interference caused by reflections from metal floor surfaces in ceilings, making it essential for ceiling-mounted access points. - Allows for easy adjustment and relocation of the AP position after installation. - Thickness can be adjusted according to the frequency band used, enabling optimal radio wave absorption. 2) "Heat-Reflective Transparent Electromagnetic Wave Shield Window Film" - Reflects over 90% of infrared rays (solar heat) contained in sunlight and cuts 99% of ultraviolet (UV) rays. - Offers a unique light efficiency of 1.4 with high light selectivity (for 73FG), demonstrating excellent heat-reflective properties while remaining transparent. It is a high-performance mirror type that can reflect infrared rays, with a visible light reflection rate of less than 10%, preserving appearance, and provides an electromagnetic wave (electric field wave) shielding effect of 25-30 dB. - When used in combination with the adjustment of the installation position of the "Wireless LAN Access Point Storage Box," high attenuation effects can be observed for exterior walls: metal curtain walls / structural floors: metal floors such as deck plates. 3) In cases where the exterior wall is RC (reinforced concrete) or ALC (autoclaved lightweight concrete), there is no shielding performance, so a composite measure involving the installation of non-combustible aluminum sheets will be implemented.
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basic information
"Wireless LAN AP Storage Box" ● This is a composite countermeasure product made with our "non-combustible aluminum sheet" [F☆☆☆☆/non-combustible: NM-1776] and "radio wave absorbing IT foam." "Heat Shielding Transparent Electromagnetic Wave Shielding Window Film" ● Reflects over 90% of infrared rays (solar heat) contained in sunlight and cuts 99% of ultraviolet (UV) rays. ● It has a high light selectivity (1.4 light efficiency in the case of 73FG) that is unmatched by other companies, demonstrating high heat shielding properties while remaining transparent. ● Despite being a high-performance mirror type that can reflect infrared rays, it has a visible light reflectance of less than 10%, preserving appearance, and provides an electromagnetic wave (electric field wave) shielding effect of 25-30 dB. When used in conjunction with the adjustment of the installation position of the "Access Point Storage Box," high attenuation effects can be observed in cases where the exterior wall is a metal curtain wall and the structural floor is a metal deck plate, etc.
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Applications/Examples of results
【Features】 'Wireless LAN Access Point Storage Box' ● Easy adjustment and relocation of the AP position after installation when used on ceilings or walls. Thickness can be adjusted according to the operating frequency band, allowing for optimal radio wave absorption. 【Construction Achievements】 'Wireless LAN Access Point Storage Box' ● Used in bulk for 200 units in an IT company's headquarters building. 'Heat Shielding Electromagnetic Wave Shield SS Window Film' ● Installed on the atrium glass surfaces of the 1st and 2nd floors of an IT office building to prevent interference from outdoor public LAN.
Detailed information
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Wireless LAN Access Point Housing Box Prevents reflection from the metal floor of the upper deck plate of the access point installed in the ceiling, while adjusting the area below to prevent indoor spreading interference.
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Non-combustible aluminum sheet applied to the exterior of the box. A non-combustible aluminum sheet is applied to the exterior of the absorber box to prevent radio wave leakage.
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By using foam radio wave absorbing material inside the box, we prevent multipath within. Additionally, by adjusting the position of the access point, we limit the radio wave emission area in the lower room and prevent interference between access points.
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Window Glass Surface: Shield Window Film By applying shield window film to the window glass surface, we reduce the intrusion of external waves and improve the indoor radio environment.
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[Regarding Fireproof Certification] Fireproof Material Certification (Non-combustible: NM-1776) Non-combustible certification is required for construction under interior restrictions. 1) Fireproof materials are those materials defined or certified by the Minister of Land, Infrastructure, Transport and Tourism according to their performance classifications of non-combustible, quasi-non-combustible, and flame-retardant. ● When subjected to heat from a typical fire, the following points must be met: ◎ It must not ignite. ◎ It must not undergo harmful deformation, melting, cracking, or other damage that is hazardous from a fire prevention standpoint. ◎ It must not emit harmful smoke or gases that could be dangerous during evacuation. ● Each performance is determined by the time after heating begins. ◎ Non-combustible performance: 20 minutes after heating begins ◎ Quasi-non-combustible performance: 10 minutes after heating begins ◎ Flame-retardant performance: 5 minutes after heating begins 2) Fireproof performance is certified based on the combination of the substrate material (as per the Ministry of Construction Notification No. 1400, non-combustible materials are defined by the amendments to Notification No. 1400 and Notification No. 1178 by the Minister of Land, Infrastructure, Transport and Tourism) and the construction method.
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You can select the operating frequency by adjusting the board thickness.
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The foam type radio wave absorber IT foam easily improves the radio wave environment. It is a radio wave absorber made from olefin-based resin foam, demonstrating excellent effectiveness in suppressing wideband characteristics, making it easy to cut and install on-site, and reducing multipath effects. It can absorb radio waves over a wide frequency range from 300 MHz to 110 GHz and excels in radio wave absorption performance for oblique incidence. Cutting and processing are easy, facilitating installation on-site. - It is an electromagnetic wave control material and radio wave absorber effective for wireless and radio technology, as well as EMC and noise countermeasures. - Made primarily from polyolefin-based resin and carbon, it can be produced in suitable thicknesses depending on the applicable frequency. - Wireless LAN access points stored in ceilings can cause interference due to reflected waves from the deck plate within the ceiling; the radio wave absorption box cuts upward radio waves, enhances the directionality of downward radio waves, and absorbs excess radio waves. - Installation on adjacent partition walls within the same floor tenant ensures prevention of radio wave interference and secures channels.
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Internal of the radio wave absorption partition
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Comparison of transparency of shield window films
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Company information
Our mission is to add our unique ideas and know-how to the new materials that are continuously emerging, in order to meet the needs of various industries, and to propose them as new products with added functionalities. Our functional composite materials demonstrate excellent and original capabilities across various fields, including home appliances, precision instruments, medical equipment, construction, and transportation, as well as in areas such as equipment parts, special rooms, and architectural panels, thereby contributing to society. Our pride lies in our development capabilities that continue to lead the industry, reflecting the times and exploring the next generation. We offer a wide range of products for electromagnetic wave countermeasures. Furthermore, we have established a system that allows us to consistently provide everything necessary for effective and efficient implementation, from on-site electromagnetic wave environment measurement and surveys to construction advice and shielding work. Technology is not born overnight. Our employees value a proactive attitude, especially when it comes to "technologies that no one else is doing," "technologies that are deemed impossible," and "unique technologies." Not everything in development is successful; in fact, failures are more common. However, it is also true that the byproduct technologies born from these challenges support our company today.