For those considering products based on the combination of shape and RF absorbers, this guide titled "Types of Microwave Absorber" introduces various forms of RF absorbers.
We cover the unique features, main applications, and benefits of using each shape.
These are RF absorbers with a foam structure capable of demonstrating high absorption performance over a wide bandwidth.
Suitable for applications such as 5G, radar, anechoic chambers, and EMI measures, they offer benefits in actual use such as being lightweight, flexible, highly durable, and easy to install.
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RF absorber foam
These are sheet-type RF absorbers characterized by being thin and easy to install.
Ranging from those for 76.5 GHz automotive applications to broadband magnetic sheets for aerospace, they can be selected according to application and material, effectively reducing reflection and countering electromagnetic interference.
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RF absorber sheet
These are ultra-thin and flexible RF absorbers that can be installed in electronic devices and limited spaces, effective for noise suppression and radar cross-section reduction.
Being lightweight, highly heat-resistant, and easy to work with, they are widely utilized in fields ranging from electronic devices to aerospace.
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Ultra thin electromagnetic absorbers
These are high-performance RF absorbers that scatter and absorb radio waves in multiple directions due to their pyramidal shape.
Using materials like urethane foam as a base, they combine wide bandwidth, high absorption performance, and flame retardancy, realizing high-precision measurement environments in anechoic chambers and EMC testing.
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Pyramidal absorbers
These are next-generation absorbers that combine different materials such as ferrite tiles and foam to achieve high-efficiency RF absorption over a wide bandwidth.
Used in EMC testing and anechoic chambers, they excel in reflection reduction performance, heat resistance, and installation flexibility, providing a precise and stable measurement environment.
| Frequency Range |
|---|
| 3GHz-320GHz |
| Material |
| Urethane Foam |
| Key Features |
| Up to 50 dB of absorption |
At just 550g per panel—approximately half the weight of competing products (*1)—this polyurethane foam absorber covers a wide frequency range from 3 to 320 GHz.
Delivers 50 dB absorption, outperforming conventional heavy ferrites.
Velcro-backed for rapid mounting, ideal for temporary setups and cost-effective maintenance.
| Frequency Range |
|---|
| 20MHz-3GHz |
| Material |
| Elastomer |
| Key Features |
| Permeability (at 1 MHz): 150 |
Heat-resistant elastomer: Designed for direct SMT processing and high-temperature durability.
Ultra-thin (from 0.1 mm) for high-density integration with robust EMI suppression.
It significantly reduces assembly workload and enables EMI countermeasures without altering the existing manufacturing process.
| Frequency Range |
|---|
| 1-35 GHz |
| Material |
| Elastomer |
| Key Features |
| Reflection Performance: –20 dB |
Frequency-tuned for specific radar absorption, offering superior stealth performance over standard RF sheets (*2).
Millimeter-thin design delivers –20 dB reflection, ensuring high absorption while preserving aerodynamic integrity.
Excellent conformance to complex geometries with thermal stability from –60°C to 150°C—ideal for aerospace platforms.