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Shielding against EMI and RFI waves is becoming a growing concern in countless industries.
Whether it’s from EMI blasts in military drones or complete room coverage from electrical interference, our Clad-Shield™ material is unique in the market as it blocks both high and low range EMI and RFI waves.
Complete EMI protection from a single product is incredibly rare. Clad-Shield attenuates both magnetic and electric fields, meaning it has limitless possible use-cases.
With EMS’s Clad-Shield, you can do more with less, unlocking untapped potential and design innovation with the increased free space and decreased weight.
High performance across broad frequencies
Clad-Shield combines a high-permeability path for low-frequency magnetic fields with a high-conductivity path for mid to high frequencies, so one construction addresses both H-field and E-field interference.
Lightweight construction
Thin laminated layers deliver shielding effectiveness with far less mass than solid steel solutions, important for SWaP-constrained systems.
Wide dynamic range
Layering strategies limit premature magnetic saturation and maintain effectiveness over a broad span of field strengths.
Low sensitivity to stress
Clad stacks distribute mechanical strain during cutting and forming, stabilizing permeability compared to single-alloy foils that can lose performance after fabrication.
Solderability and formability
Solderable outer surfaces simplify bonding and grounding. Thin gauge material forms easily into cans, covers, and gaskets for enclosure-level integration.
Clad-Shield delivers broadband attenuation of both magnetic and electric fields, so one material can address low-frequency H-fields and higher-frequency E-fields in compact assemblies.
Technical notes:
High shielding effectiveness at a fraction of the mass of solid steel solutions, enabling weight-critical designs.
Technical notes:
Stable shielding performance across a wide range of field strengths, helping prevent rapid roll-off as fields increase.
Technical notes:
Designed for stable performance after typical fabrication and assembly operations such as cutting, bending, and fastening.
Technical notes:
Solderable outer surfaces and good formability simplify enclosure design, grounding, and assembly.
Technical notes:
With Clad-Shield, you get the benefits of both materials, offering two key mechanisms that complement each other perfectly.
Two complementary mechanisms
1 Magnetic absorption at low frequencies and in the magnetic near field
A high-permeability layer provides a low-reluctance path, pulling flux into the shield and away from sensitive circuitry.
2 Conductive reflection at mid to high frequencies
A highly conductive layer supports induced surface currents that create opposing fields, reflecting incident energy. As frequency rises, skin depth decreases and reflection dominates.
Why this matters
Wave impedance and distance from the source determine whether the disturbance behaves like a magnetic field, an electric field, or a plane wave. Clad-Shield’s paired properties let a single material cover multiple regimes without changing materials or adding parts.
Understanding how electromagnetic interference behaves across different frequency ranges is critical to designing effective shielding for your unique application.
The chart below breaks down the dominant field regimes from DC through the gigahertz range, the shielding mechanisms that apply, and the material attributes that matter most at each stage.
Frequency band | Dominant field regime | Primary mechanism | Material attributes to prioritize | Design guidance |
DC to ~60 Hz | Magnetic near field | Magnetic absorption, flux rerouting | Very high permeability, adequate resistivity | Provide a continuous low-reluctance path around the protected volume. Avoid gaps at seams. |
~60 Hz to ~2 kHz | Magnetic near field, increasing eddy effects | Absorption, impedance coupling into magnetic layer | High permeability with narrow hysteresis, stable after forming | Maximize coupling area to the magnetic layer. Ensure good mechanical support to limit stress-induced µ loss. |
~2 kHz to ~50 kHz | Transition region | Absorption plus reflection (eddy currents become significant) | Ferromagnetic properties with rising conductivity | Combine high-µ layer with a conductive layer. Maintain electrical continuity for current return. |
~50 kHz to ~1 GHz | Electric field and plane-wave behavior increases | Conductive reflection via surface currents | High conductivity, continuous grounding, low joint resistance | Emphasize seam integrity, overlaps, and gasketing. Minimize slot lengths relative to wavelength. |
>1 GHz | Plane-wave, shallow skin depth | Reflection with specialized loss media as needed | Very high conductivity; optional absorbers or graded-resistance media | Consider absorber foams, pyramids, or resistive sheets where conductive shielding alone is insufficient. |
The opportunities at your fingertips with EMS’s Clad-Shield material are limitless, offering reliable EMI/RFI protection across frequencies that few single materials can match.
When you’re looking for more protection, flexible design opportunities, and lower weight, we have exactly what you need.
Click the link below and download your free EMS Clad-Shield™ Guide!
Ready to take the next step?
Interested in samples? Want to discuss a prototype? EMS Engineers are on standby to help you find the perfect solution for your unique application. Email us today and let’s get started making something special!
Contact us right here: solutions@emsclad.com