By utilizing a variety of materials and structures, such as honeycomb shapes, pyramid shapes, and elastomers, PPG (Cuming Microwave) offers microwave absorbers capable of accommodating a wide range of frequencies. These absorbers can be used in various applications, including aircraft stealth specifications and marine structures. The following sections introduce the product key features and specifications, recommended applications, , and the company’s support structure.
This is a high-power-compatible pyramidal honeycomb microwave absorber. It utilizes specially treated plastic honeycomb to achieve absorption performance across a wide range of frequencies. The product is suitable for reducing reflections and achieving stable measurement conditions in environments such as anechoic chambers and high-power RF testing environments. Furthermore, in the case of small test boxes, the product can be secured by press-fitting.
Reference: [PDF]PPG (Cuming Microwave) Official Website（https://max.ppg.com/adaptivemedia/rendition）
This is a broadband pyramidal RF absorber based on low-density polyurethane foam. Its steep pyramid-shaped structure creates an impedance gradient that delivers excellent absorption under both normal and oblique incidence. It is ideal for reducing reflections in anechoic chambers, RCS measurement facilities, and microwave test ranges.
Reference: PPG (Cuming Microwave) Official Website（https://assets-us-01.kc-usercontent.com/2a927e0d-6649-001d-033d-d488bdff5f23/55f4b07e-d63f-48ad-85d4-afc5d8da1317/C-RAM-SFC_6-5-23.pdf）
FLX is a series of thin, flexible, narrow-band, magnetically-loaded RF absorbers tuned to specific frequencies. At the design frequency, it achieves a reflectivity of 20 dB or less for normally incident energy. The series is suitable for applications such as the reduction of radar reflection when mounted on aircraft structures, nose cones, ship masts, and instrument housings.
Reference: [PDF]PPG (Cuming Microwave) Official Website（https://max.ppg.com/adaptivemedia/rendition?id=a9dca5879b6694ed814a872c7ed0bc0d418304e5）
This resource introduces recommended products suitable for various applications, allowing you to choose a microwave absorber that meets your company's needs. Please use this information as a reference, as we feature a wide variety of products for applications such as next-generation R&D and high-density packaging.
| Product | Frequency Bandwidth | Absorption Performance | Size | Material | Use Cases |
|---|---|---|---|---|---|
| C-RAM SFC-HC | Approximately 0.12GHz to18 GHz | Up to 45dB (varies by frequency) |
60cm × 60cm square panels maximum height 183cm |
Phenolic resin-coated plastic honeycomb | High-power test chambers |
| C-RAM SFC | Approximately 0.08GHz to 50GHz |
Up to 60 dB (varies depending on frequency and grade) |
60cm × 60cm square panels height 7.6cm to 244cm |
Specially processed low-density polyurethane foam | Broadband chambers and RCS ranges |
| C-RAM: FLX | Approximately 1GHz to 35GHz |
Reflectivity of 20dB or less at the design frequency |
Standard 30cm × 30cm thickness: 0.6mm to 6.4mm |
Magnetically loaded low-density elastomer | Conformal radar-reflection control |
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.
PPG (Cuming Microwave) offers technical support from specialized engineers, customization in design and manufacturing, reduced lead times, and quality assurance. Design and construction of anechoic chambers, comprehensive provision of precut component kits, and construction support are also available. Furthermore, the company has developed technical documentation and guidelines to meet a diverse range of customer needs.
| Company Name | PPG Industries, Inc. (Cuming Microwave) |
|---|---|
| Headquarters Address | One PPG Place, Pittsburgh, PA 15272, U.S.A |
| Official Website | https://www.ppg.com/en-US |
| 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.