TennMax America offers microwave absorbers made of magnetic epoxy resin and silicone rubber, engineered to accommodate complex shapes. The following sections introduce the product key features, suitable applications, specifications, and the company’s support services.
CR-DE-3 High Performance is a dispensable RF absorber based on magnetic epoxy resin, featuring high adhesion to metallic substrates and low-outgassing characteristics. Applicable to complex shapes, it effectively suppresses cavity resonance and mitigates RF noise and standing waves. It is also ideal for EMI countermeasures and RCS reduction in aerospace, defense, and telecommunications.
Reference [PDF]: TennMax America Official Website（https://static1.squarespace.com/static/638631415c99740c758dbd0f/t/6737acb4b449b5162e330f1d/1731701947040/CR-DE-3.pdf）
CR-SS-3 High Performance is a silicone rubber-based cavity resonant absorption pad, featuring a thickness range of 0.25 to 2.00 mm, a density of 4.30 g/cm³, and UL94 V-0 flame retardancy. Easily customizable through cutting, it features low outgassing properties and is fully RoHS compliant. Ideal for enhancing EMI performance by controlling reflections and eliminating resonances within enclosed spaces and cavities.
Reference [PDF]: TennMax America Official Website（https://static1.squarespace.com/static/638631415c99740c758dbd0f/t/67dd740609cd455c6666a887/1742566408291/CR-SS-3.pdf）
CR-DE-2 Commercial Grade is a low-profile absorber made of magnetic epoxy resin, featuring superior adhesion for direct application onto metallic surfaces. It effectively reduces RF signal interference, standing waves caused by cavity resonance, and noise, while also complying with NASA outgassing standards. Additionally, it offers excellent thermal resistance and can be used in thicknesses from 0.5 mm, making it ideal for electromagnetic interference suppression in aerospace and high-end electronic applications.
Reference [PDF]: TennMax America Official Website（https://static1.squarespace.com/static/638631415c99740c758dbd0f/t/6737aca9c89a3347467fada3/1731701930005/CR-DE-2.pdf）
This resource provides a detailed introduction of products suitable for various applications. Use this information to compare and select the ideal microwave absorber for your specific requirements, ranging from next-generation R&D and high-density packaging to stealth technology and RCS reduction.
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.
TennMax absorbers should be selected based on the installation shape, substrate material, and whether the main issue is RF noise, cavity resonance, or standing-wave suppression.
| Product | Frequency Bandwidth | Absorption Performance | Size | Material | Use Cases |
|---|---|---|---|---|---|
| CR-DE-3 | Not specified | Not specified | Dispensing possible from a minimum thickness of 0.5mm |
Magnetic epoxy resin | High-performance dispensed cavity absorber |
| CR-SS-3 | Not specified | Not specified | 12 × 12 inches (30.5cm × 30.5cm) | Silicone rubber substrate | Die-cut cavity resonance pads |
| CR-DE-2 | Not specified | Not specified | Dispensing possible from a minimum thickness of 0.5mm |
Magnetic epoxy resin | Commercial-grade dispensed cavity absorber |
CR-DE-3 High Performance is suitable for complex metallic surfaces where a dispensed absorber is easier to apply than a die-cut sheet. It works well for RF noise reduction, standing-wave suppression, EMI countermeasures, and aerospace or defense applications requiring low-outgassing performance.
CR-SS-3 High Performance is recommended when a flexible absorber pad can be cut and fitted to the target shape. It is useful for enclosed spaces, cavities, and compact electronic structures where reflection control and resonance reduction are required.
CR-DE-2 Commercial Grade is suitable for direct application to metal surfaces where RF signal interference and cavity resonance must be reduced. It is a practical option when a low-profile, dispensable absorber is needed for high-end electronics or space-constrained assemblies.
Integrating EMI shielding and thermal management products into a single production line shortens the flow to prototyping and enables a system capable of handling various products tailored to specific applications. Furthermore,the company's network of eight global locations facilitates the selection of absorbers and acoustic pads for commercial applications, with the capability to handle emergency shipments. An international team provides comprehensive support throughout the year.
Before contacting TennMax or a supplier, prepare the key technical conditions below to help identify the most suitable RF absorber.
| Company Name | TennMax America, Inc. |
|---|---|
| Headquarters Address | 7500 NE St Johns Rd.Vancouver, WA 98665 USA |
| Official Website | https://www.tennmax.com/ |
| 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.