Radio Wave Reflective Film to Eliminate Indoor 5G/6G Dead Zones

5G mobile communication is now widely used in daily life. Meanwhile, physicists, engineers, and telecom companies are already researching next-gen 6G technology. However, these new standards bring challenges for operators in places like campuses network and industrial IoT settings: higher frequencies mean radio signals weaken faster, making coverage harder—especially in busy areas.

To solve this, a leading Japanese chemical company has developed a transparent, bendable radio wave reflective film. This film excels at both high transparency and scattering radio waves. It reflects and scatters signals, helping 5G and 6G reach every dead zone. MICRON, the supplier of its core material, provided high-performance Copper Metal Mesh Film, ensuring the film’s strong signal reflection and high light transmittance.

The Limits of 5G

We’ve all experienced this: your phone shows full 5G bars outside, but indoors it drops to just two—or even switches to 4G. Inside large buildings or crowded spaces, 5G signals often disappear.

5G uses higher frequencies than 4G LTE—like Sub-6 GHz (3.6 GHz and above) and millimeter-wave (24 GHz and above). Higher-frequency radio waves have shorter wavelengths. They weaken more quickly and are easily blocked by walls or objects. Installing more cell towers or repeaters could fix this, but it’s expensive.

That’s where this new film shines. With 95% light transparency and flexibility, it’s a reliable, cost-effective solution. It works across a wide band (2 GHz to 144 GHz), improving not just millimeter-wave signals but also current Wi-Fi (2.4GHz–5GHz). Its broad compatibility also means it supports future upgrades, saving users from frequent device replacements.

How It Works

The radio wave reflective film contains:

1. A copper metal mesh layer (reflects high-frequency radio waves)
2. Highly transparent adhesive
3. A special protective coating
4. A unique bonding layer

It reflects radio waves in both Sub-6 GHz (like 3.6 GHz+) and millimeter-wave (24 GHz+) ranges—perfect for 5G and future 6G.

The film is transparent and flexible. You can easily apply it like a poster to walls, windows, ceilings, or pillars—without ruining the look. When placed on a wall, it reflects and scatters radio waves, guiding 5G/6G signals into dead zones and improving indoor coverage.

Wide Range of Uses

This film has many potential uses: offices, factories, malls, parking garages—anywhere you need better network coverage. It improves connectivity quickly and cheaply, outperforming traditional towers or repeaters.

1. Solves dead zones behind large factory equipment
2. Boosts signals for phones/tablets in offices, classrooms, etc.
3. Stabilizes coverage in complex temporary spaces (e.g., event halls)
4. Blends seamlessly on building exteriors or billboards in urban areas

Building a Connected Future Together

As a leader in Copper Metal Mesh Film technology, MICRON supplied the core material for this breakthrough reflective film—helping solve high-frequency coverage challenges.

We know reliable, fast wireless connections are vital today. MICRON looks forward to partnering with more innovators to develop cutting-edge communication products. We’ll keep advancing material technology to boost global connectivity and improve lives—building a smarter, more connected world.