EMI Absorbing Material
Electromagnetic wave absorbing material — wideband absorption (1–40 GHz), reduces reflection, lowers EMI and crosstalk. Flexible mounting. Suited for EMC chambers, antenna isolation and radar absorption.
Key Features
- Wideband absorption (1–40 GHz), broad coverage
- Reduces reflection, lowers crosstalk
- Flexible mounting, easy install
- Effectively reduces electromagnetic interference
Applications
EMC chamber · Antenna isolation absorption · Radar absorption · Chip-level EMI suppression
Material Tags
Technical Parameters
| Type | EM wave absorbing material |
|---|---|
| Frequency | Wideband 1–40 GHz |
| Thickness | 0.3–3.0 mm |
| Feature | Absorb reduces reflection |
| Temperature | −40 ~ 125 °C |
| Application | EMC / Antenna / Radar absorption |
| Die-Cutting Tolerance | ±0.10 mm |
Frequently Asked Questions about EMI Absorbing Material
Common questions about die-cutting and material selection for this product
What Shielding Effectiveness Can Copper Foil Die-Cutting Achieve?
Conductive copper foil die-cut parts achieve 60-100 dB shielding effectiveness, covering most EMC scenarios. Actual effectiveness depends on foil thickness (typically 0.018-0.07mm), conductive adhesive type, and overlap area. For high-frequency interference (>1 GHz), use thicker foil and ensure good overlap grounding.
Why are copper foil die-cutting precision requirements so high?
Copper foil shield dimensions directly affect shielding effectiveness — a 0.03 mm error enlarges the lap gap and sharply reduces effectiveness. Copper foil die-cutting tolerance is typically within ±0.05 mm. For precision shielding, use etching dies or laser cutting, plus 100% dimensional inspection.
Which is better — conductive fabric or copper foil shielding?
Conductive fabric is flexible, suits curved and irregular shapes, and bends without breaking. Copper foil has higher effectiveness (10-20 dB more), suits flat shielding and high-frequency scenarios. They are often combined: copper foil for core shielding zones, conductive fabric for gaps and bends. Choose by frequency, shape complexity, and cost.
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