Amáltheia NX-42

Integrated Stealth Materials for Aerospace & Defense

Our proprietary Amáltheia NX-42 structural RAM platform achieves broadband electromagnetic attenuation exceeding 99%.

Amáltheia NX-42 is a next-generation structural Radar Absorbent Material (RAM) engineered to deliver broadband electromagnetic attenuation while maintaining load-bearing capability and aerospace-grade durability.

Developed using LightRoad’s proprietary graphene-enhanced multi-layer architecture, Amáltheia integrates conductive, magnetic, dielectric and ferroelectric elements into a single composite system optimized for S-, C- and X-band stealth performance.

It enables lightweight low-observability surfaces for aerospace, naval and advanced platform applications without compromising structural integrity.

Such levels of absorption, embedded directly in a load-bearing composite, drastically reduce return power even for high-end multi-million-euro AESA systems.
In practical terms:
Amáltheia can introduce low-observable signatures that create blind cones, coherence disruptions and tracking instabilities in advanced radars like the Kronos family, especially at short-to-medium range where structural RAM is most effective.

Technology Overview

Amáltheia NX-42 employs a graded impedance-matching structure combining:

• Graphene-based conductive layers for surface loss and controlled percolation
• Magneto-lossy fillers for magnetic attenuation
• Ferroelectric domains for dielectric relaxation losses
• Scattering phases for multi-mechanism energy dissipation
• Ceramic dispersions to stabilize dielectric response and tune broadband behaviour
• Carbon-fiber structural plies forming the mechanical backbone of the system

This architecture creates phase decorrelation, multi-path destructive interference, and broadband energy dissipation, resulting in high absorption across wide frequency ranges.

Key Features

• Broadband EM Absorption: Optimized for S, C and X bands
• Structural Composite: Fully load-bearing, carbon-fiber reinforced
• Lightweight: 7–10 kg/m² depending on configuration
• Environmentally Robust: Temperature- and moisture-stable formulation
• Scalable Manufacturing: Suitable for aerospace-grade lamination and molding
• High Survivability: Resistant to vibration, impact and field conditions

Not as an external coating —
but as part of the structure itself.

Unlike conventional FSS-based stealth skins, Amáltheia leverages a fundamentally different multi-resonant mechanism to generate multiple, tunable absorption peaks — delivering an epoch-level advantage in radar signature control.

Performance Highlights

• Independent anechoic-chamber validation (2025)
• Up to −28 dB attenuation in S-band
• Up to −20 dB attenuation in X-band
• Multi-peak absorption enabled by hybrid dielectric-magnetic architecture
• Stable performance across wide angular incidence
• Polarization-Agnostics behavior (consistent absorption for both TE and TM modes)

(Detailed performance data available under NDA.)

Use-Case Domains

Aerospace

• UAV skins and radomes
• Low-observable airframes
• Sensor-shielding and EM signature reduction

Naval

• Stealth superstructures
• RCS reduction panels
• Above-water composite claddings

Defense Infrastructure

• 5G/6G EM interference shielding
• Radar-sidewall absorption
• Antenna multipath suppression

Dual-Use Applications

• Telecom equipment
• Industrial EM protection
• High-performance composite structures

Technology Readiness

TRL 6 — Demonstrated in relevant environment
(60×60 cm composite panels validated in controlled anechoic test facilities.)

Further scaling to platform-specific geometries is supported through LightRoad’s in-house composite manufacturing capabilities.