2in Flat Polyurethane Foam RF Absorber Tile Composition: carbon and fire retardant chemical loaded polyurethane foam Working Temperature: -85°F to 176°F (-50°C to +80°C) Environment: Indoor Use Fire Retardancy: Certified to NRL 8093 Tests I, II & III Typical Power Handling: 1kW/m² Installation: Adhesive bonding Dimensions Thickness Weight Base Size 2in (50mm) 4.2 kg/m² 20×20in (500×500mm) Reflectivities Reflectivity Normal frequency (GHz) 1.5 GHz 3 GHz 5 GHz 10 GHz 15 GHz 40 GHz Reflectivity (-dB) at normal incidence 6 10 10 13 15 17 Frequently Asked Questions How does a flat absorber differ from a pyramidal absorber? Flat absorbers have a smooth, uniform surface with no pyramid geometry — ideal for corners, hard-to-reach positions, and compact microwave anechoic boxes where a flush surface is needed. Pyramidal absorbers provide deeper absorption at equivalent thickness; flat absorbers are the practical choice where depth is constrained or surface uniformity is required. What frequency range does the 2in flat absorber cover? The 2in flat absorber provides absorption from 1.5 GHz to 40 GHz, with best performance above 5 GHz. For lower frequency coverage or deeper absorption, consider our pyramidal absorber line. How quickly does the 2in flat absorber ship? The 2in flat absorber is in stock and ships within 1–2 business days from our California warehouse. What are dB Absorber flat absorbers made of? Our flat absorbers are made of carbon and fire retardant chemical loaded polyurethane foam — the same material as our pyramidal line, volumetrically loaded for consistent electromagnetic properties throughout. Are your flat absorbers fire rated? Yes, all dB Absorber foam is certified to NRL 8093 Tests I, II & III. Additional certifications include DIN 4102-1 Grade B2 and UL94 HBF. How are flat absorbers installed? Flat absorbers are installed via adhesive bonding directly to chamber walls, corners, or enclosure surfaces. The smooth back surface makes them ideal for irregular positions that pyramidal tiles cannot cover. .faq-section details { margin-bottom: 0.75em; border: 1px solid #e5e5e5; border-radius: 4px; padding: 0; } .faq-section summary { padding: 1em; cursor: pointer; font-weight: 600; list-style: none; } .faq-section summary::-webkit-details-marker { display: none; } .faq-section summary::before { content: "+"; margin-right: 0.75em; font-weight: bold; } .faq-section details[open] summary::before { content: "−"; } .faq-section details p { padding: 0 1em 1em 1em; margin: 0; color: #666; line-height: 1.6; }
