Countermeasures for Wireless LAN Network Interference in the 5G Era: Composite Use Cases of Non-combustible Aluminum Sheets + Radio Wave Absorbing Body Box / Heat Insulating Transparent Electromagnetic Wave Shielding Film.
1) "Wireless LAN Access Point Storage Box" - Controls the direction of radio wave emission to prevent interference, and prevents interference caused by reflections on metal floor surfaces within the ceiling, 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 high light selectivity with a light efficiency of 1.4 (for 73FG), which is unmatched by other companies, demonstrating high heat-reflective properties while remaining transparent. It is a high-performance mirror type that can reflect infrared rays, with 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 combination with the adjustment of the installation position of the "Wireless LAN Access Point Storage Box," high attenuation effects are observed in cases of exterior walls: metal curtain walls / structural floors: metal deck plates, etc. 3) In cases where the exterior wall is RC (reinforced concrete) and 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 with a light efficiency of 1.4 (in the case of 73FG), which is unmatched by other companies, and demonstrates 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 of exterior walls: metal curtain walls and structural floors: metal deck plates, etc.
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Applications/Examples of results
【Features】 "Wireless LAN Access Point Storage Box" ● Easy adjustment and relocation of AP position after installation when used on ceilings or walls. Thickness can be adjusted according to the frequency band used, 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 glass surfaces of the atrium on 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 deck plate above 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 outer surface of the box. A non-combustible aluminum sheet is applied to the outer surface 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 the interior. Additionally, by adjusting the position of the access points, 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 designated 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 materials must meet the following key points: ◎ They must not ignite. ◎ They must not undergo harmful deformation, melting, cracking, or other damage that is detrimental to fire safety. ◎ They must not emit harmful smoke or gas that could impede evacuation. ● Each performance is defined by the time elapsed 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 Ministry of Construction Notification No. 1400 and Ministry of Land, Infrastructure, Transport and Tourism Notification No. 1178, as determined by the Minister of Land, Infrastructure, Transport and Tourism) and the construction method.
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You can select the operating frequency with board thickness adjustment.
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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 cutting and installation at the site easy 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 is easy, facilitating installation at the 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 manufactured in suitable thicknesses depending on the applicable frequency. - Wireless LAN access points stored in the ceiling can cause interference due to reflected waves from the deck plate in the ceiling; the radio wave absorption box cuts off upward radio waves, enhances the directionality of downward radio waves, and absorbs excess radio waves. - Installation on adjacent partition walls in the same floor tenant achieves 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 exhibit excellent and original features across various fields, including home appliances, precision equipment, medical devices, construction, and transportation, as well as in areas such as equipment parts, special rooms, and architectural panels, thereby serving everyone effectively. "Reflecting the times and exploring the next generation" is our pride in our continuous development capabilities that lead the industry. We offer a variety of electromagnetic wave countermeasure products. Furthermore, to carry out these measures effectively and efficiently, we have established a system that allows us to conduct electromagnetic wave environment measurements, field surveys, construction advice, and shielding work consistently. Technology is not born overnight. Our employees cherish a proactive attitude towards "technologies that no one is doing," "technologies that are deemed impossible," and "unique technologies." In development, not everything is successful; in fact, failures are more common. However, it is also true that the byproduct technologies born from challenges support our company today.