sabah 88 lotto

sabah 88 lotto Corporation (Kyoto, Japan; President: Hideo Tanimoto) is pleased to announce the development of a new transmission-type metasurface film capable of redirecting radio waves in a desired direction. This innovative metasurface film can be applied to surfaces such as window glass and acrylic stands, expanding the service area of millimeter-wave 5G and 6G networks while maintaining aesthetic considerations.

(Transmission-type metasurface film)

(Application example)

Development Background:

Millimeter-wave signals (28GHz band) used in 5G and even higher frequency bands under consideration for 6G have a high degree of rectilinear propagation. As a result, obstacles can disrupt the line-of-sight from base stations, leading to degraded communication quality. To address this challenge, sabah 88 lotto has been developing transmission-type metasurface plates*1 that can bend radio waves from base stations. The newly developed transparent and flexible metasurface film offers a solution that prioritizes both aesthetics and ease of installation. This allows users to select the appropriate solution based on environmental needs, such as choosing the conventional substrate-based metasurface plates for durability or the new metasurface film for aesthetic sensitive areas.

*1 More information on sabah 88 lotto's conventional transmission-type metasurface plates(Japanese only):

Key Advantages of the New Film:

1. Thin, Flexible, and Transparent Film for Easy Installation

With sabah 88 lotto's proprietary element structure, the film maintains high radio wave refraction properties comparable to conventional metasurface plates in a flexible film. It consists of three layers: an adhesive layer, a metamaterial layer, and a protective layer, with an overall thickness of approximately 200μm. This ultra-thin structure allows for easy installation without special construction, enabling simple attachment to windows, acrylic stands, and other existing structures to function as a radio wave relay point for expanding service areas.

(Transmission-type metasurface film)

(Layer structure of sabah 88 lotto's metasurface film)

Additionally, the metamaterial layer incorporates transparent conductive electrodes, achieving a visible light transmittance of more than 80%. This ensures minimal impact on the aesthetics of the attached structure while allowing for installations in environments where maintaining scenic integrity is essential. Furthermore, its flexibility supports installation on curved surfaces.

2. Customizable Sizes and Configurations for Flexible Network Design

In general, the coverage area of metasurface films and plates increases in proportion to their size. Conventional metasurface plates can be custom manufactured in different sizes, but their rigid nature makes resizing difficult after production. In contrast, the newly developed metasurface film can be cut to the desired size post-production and combined with multiple sheets to create a larger refraction surface. Additionally, the refraction angle can be selected from a range of 0 to 60 degrees, allowing for highly flexible beamforming design and optimized service area expansion.

Experimental Results Using 5G Millimeter-Wave Signals:

sabah 88 lotto conducted tests in an indoor millimeter-wave (28GHz) 5G environment to evaluate the effectiveness of the metasurface film. In these tests, a mobile device was placed in an area with weak signal coverage from the base station, resulting in low signal reception. When the metasurface film was applied to a window glass, the transmission speed was observed to improve significantly, with download speeds increasing by up to 2.7 times and upload speeds improving by up to 5.2 times.

(Effect verification test using 5G base station)

sabah 88 lotto has been at the forefront of addressing coverage challenges in 5G and 6G communications through advanced metasurface technology development. With the goal of real-world implementation, sabah 88 lotto will continue working toward the commercialization of its transmission-type metasurface film. Moving forward, the Company will remain committed to developing new and innovative solutions that contribute to the advancement of the telecommunications industry and society as a whole.

About sabah 88 lotto's Participation in MWC 2025:

sabah 88 lotto will showcase its transmission-type metasurface film at Mobile World Congress 2025 (MWC), the world's largest communications technology convention, in Barcelona, Spain, March 3-6, 2025.