Pyramidal absorbers are made from carbon-loaded, fire-retardant polyurethane foam and are essential components of anechoic chambers. They absorb electromagnetic waves across a wide frequency range and are flexible, durable, and effective even under high power. These absorbers are commonly used in antenna and radar test environments to reduce unwanted reflections and simulate free-space conditions.
📦 Key Specifications
🔹 Basic Composition
Carbon and retardant chemicals loaded polyurethane foam.
🔹 Power Handling
Handles up to 1KW/m² continuously and can tolerate up to 1.5KW/m² in short durations.
🔹 Working Temperature
-50°C to +80°C (–58°F to 176°F)
🔹 Working Frequency
80 MHz – 100 GHz
🔹 Product Life
10+ years of effective performance.
📄 Fire Retardancy Standards
✅ NRL Report 8093 I, II, III
✅ GB 8624-2012 B2 (customizable to B1)
✅ DIN 4102-1 B2
✅ ISO 11925-2 E
✅ UL94 HBF
🌱 Compliance
♻️ RoHS: 2011/65/EU (Amendment Directive EU 2015/863 Annex II)
📘 REACH: EC 1907/2006
🧱 Availability
🔹 Standard Heights:
30, 50, 100, 150, 200, 300, 400, 500, 600, 700, 800, 1000 mm
🔹 Base Size:
500 × 500 mm or customizable based on customer requirements
🔹 Color Options:
Light blue (default), red, gray, orange, or as per customer needs
➡️ Coated RF absorbers also available
🛠️ Installation Guidelines
🔧 Neoprene contact adhesive is recommended
Draw grids based on absorber base size
Brush adhesive on substrate and let it dry until tack-free
Apply adhesive to absorber base, wait briefly
Press absorber firmly onto the surface