Ultra-thin electromagnetic absorbers are characterized by their ultra-thin design, lightweight properties, and suitability for microwave absorption. The following sections explore the key features, primary applications, and practical benefits of these absorbers, highlighting their suitability for confined spaces and portable devices.
Characterized by a thin, flexible structure that allows for easy installation on equipment surfaces and in confined spaces.
The silicone rubber substrate provides excellent heat and weather resistance, enabling use over a wide temperature range from −54°C to +160°C. Furthermore, the ease of application to curved or metallic surfaces facilitates targeted, localized microwave absorption measures. This contributes to preventing device malfunctions, stabilizing communication, and enhancing radar detection accuracy.
Primary applications include reducing unwanted reflected waves around antennas, radar equipment, and inside electronic devices, as well as suppressing electromagnetic interference (EMI) and reducing radar cross-section (RCS). The flexibility to select specific thicknesses and materials based on the application and frequency range enables the use of these absorbers across diverse fields, including industrial, automotive, and aerospace sectors.
| Manufacturer Name | Microwave Factory |
|---|---|
| Frequency range | 1 GHz to 76.5 GHz |
| Absorption performance | Up to 20 dB |
| Size | 30.5 cm × 30.5 cm *Thickness varies depending on the resonant frequency |
| Material | Silicone |
Reference: [PDF]Microwave Factory Official Website（https://ece.co.jp/assets/pdf/products/ECCOSORB%20SF_ja.pdf）
Learn more about
Microwave Factory's
RF absorbers
As an ultra-thin noise suppression sheet with a thickness starting from 0.1 mm, it accommodates narrow mounting spaces while delivering high noise suppression efficiency. Applying the sheet near noise sources such as CPUs, power ICs, or on cables effectively reduces radiated noise by absorbing magnetic field components.
It offers a high permeability of 150 at 1 MHz, delivering stable absorption performance over a broadband frequency range and operating reliably in environments from −40 to 105°C. In addition to being environmentally friendly through RoHS and halogen-free compliance, it can be easily cut and affixed, spanning various design stages from prototyping to mass production.
It is suitable for high-density packaging such as automotive infotainment and automotive electronics, wireless infrastructure, memory modules, and low-frequency signal lines.
| Manufacturer Name | Laird Technologies |
|---|---|
| Frequency range | 20 MHz to 3 GHz |
| Absorption performance | Not specified on the official website |
| Size | 0.01 cm to 0.05 cm × 29.5 cm × 21.0 cm |
| Material | Elastomer |
Reference: Laird Technologies Official Website（https://www.laird.com/products/absorbers/thin-elastomer-absorbers/nearfield-film/noisesorb-ns1000htrc）
Learn more about
Laird Technologies'
RF absorbers
As a thin, flexible, narrowband RF absorption sheet tuned to a specific frequency, it is designed for mounting on metal surfaces such as aircraft structures, nose cones, ship masts, and instrument housings to reduce radar reflections.
At the design frequency, it exhibits high absorption performance of approximately −20 dB against normally incident energy, making it ideal for stealth applications tuned to specific radar bands.
Constructed using a silicone-based elastomer substrate, it is flexible and adheres easily to curved surfaces, providing high reliability in temperature environments from −60 to 160°C. Furthermore, with a wide range of mounting options including silicone RTV adhesives and pressure-sensitive types, it achieves excellent weatherability and long-term stability while maintaining a lightweight, thin design.
| Manufacturer Name | PPG (Cuming Microwave) |
|---|---|
| Frequency range | Approximately 1 GHz to 35 GHz |
| Absorption performance | 20 dB or less at the design frequency |
| Size | Standard: Approximately 30 cm × 30 cm, thickness: approximately 0.06 cm to 0.64 cm |
| Material | Elastomer |
Reference: PPG (Cuming Microwave) Official Website（https://max.ppg.com/adaptivemedia/rendition）
Learn more about
PPG (Cuming Microwave)'s
RF absorbers
The RF absorber market is expanding rapidly, driven by the increasing need for EMI (Electromagnetic Interference) reduction in 5G/6G, autonomous driving, and defense applications.
This site provides comparative information on products and manufacturers by application to help you identify the ideal solutions for R&D, anechoic chambers, and high-frequency testing.
| 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.