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Radio Frequency Friendly Covers

Designed for data transfer and inductive charging

Installed from Cadiz to Connecticut

Radio frequency friendly manhole and trench covers

Following demand for Radio Frequency (RF) friendly covers, Fibrelite has developed a range of FRP GRP composite manhole and trench covers, specifically designed (and independently tested) to support data transfer between antennas underground and aboveground and inductive wireless charging.

Key applications include belowground 5G and Wi-Fi, remote underground monitoring systems/telematics in utilities and wireless electrical vehicle charging (EVC). The new range has the same lightweight, strong, maintenance-free properties as all Fibrelite covers.

The technology explained

Traditional ductile iron and reinforced concrete manhole covers aren’t conducive to the transmission of RF signals or inductive charging. Metal reflects the signals, while concrete greatly weakens them (exhibits high attenuation coefficients). This means that the transmitted signals are greatly weakened, restricting range and functionality.

Glass Reinforced Plastic (FRP) (GRP) in contrast, absorbs far less of the signal (lower attenuation coefficient. Full details in whitepaper.). In the case of inductive charging, a non-metallic solution is essential to prevent electrostatic charge buildup and influencing the magnetic field.

Products specific to radio frequency transparent covers

C250
Trench Covers

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D400
Trench Covers

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FL90
Manhole Covers

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FL7
Lifting Handles

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ANSI Tier 15
Trench Covers

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AASHTO H25 / HS-25
Trench Covers

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FL90
Manhole Covers

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FL7
Lifting Handles

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