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Cavity Resonance Absorbers (MR21 Series)
Reduce Cavity Resonance.
Restore RF Performance.
MR21 Series cavity resonance absorbers are engineered to suppress standing waves and lowerQ-factor inside metallic enclosures operating from 1 to 40 GHz. By reducing resonant electromagnetic energy at its source, MR21 materials improve shielding effectiveness, stabilizeRF performance, and eliminate cavity-induced interference without redesigning the enclosure.
1-40 GHz Operating Range
Lowers Cavity Q-Factor
PSA & Non-PSA Options
Multiple Thickness Configurations
MR21 Series · Overview
Engineered for High-Frequency Enclosures Where Resonance Matters
Metallic enclosures naturally create resonant cavities that amplify RF energy at predictable frequencies. Left untreated, these resonances can reduce shielding effectiveness, increase emissions, and introduce unpredictable system behavior.
MR21 cavity resonance absorbers are engineered to damp unwanted electromagnetic energy directly inside the enclosure, reducing Q-factor and restoring stable RF performance across applications from laboratory test equipment to aerospace and defense electronics.
COMMON APPLICATIONS
How It Works
Suppress Resonance Before It Becomes Interference
When enclosure dimensions correspond to multiples of a signal wavelength, standing electromagnetic waves develop inside the cavity. These resonances amplify RF energy, degrade shielding performance, and create unpredictable interference.
MR21 materials introduce controlled RF loss along conductive enclosure surfaces. The absorber converts unwanted electromagnetic energy into low-level heat, lowering cavity Q-factor, reducing standing waves, and restoring stable RF operation without requiring enclosure redesign.
Performance & Test Methods
Verified Using Industry-Standard RF Test Methods
Every MR21 configuration is characterized using industry-standard free-space measurement techniques, including NRL Arch Reflectivity testing. Performance data includes reflectivity curves, attenuation characteristics, and frequency response to support engineering evaluation and material selection.
Technical Data Sheets provide configuration-specific performance data for accurate product specification.
Material & Configuration Options
Multiple Material Configurations for Precise Resonance Control
Every enclosure behaves differently. MR21 is available in multiple formulations, thicknesses, and installation options to match operating frequency, enclosure geometry, environmental conditions, and manufacturing requirements.
Multiple Thickness Selections
Frequency-Tuned Thickness Options
Available in multiple thicknesses to optimize attenuation at different operating frequencies and cavity dimensions.
Elastomer-Based Formulations
Durable Elastomer Formulations
Engineered for long-term environmental stability, mechanical durability, and repeatable RF performance.
Optional PSA Backing
PSA Installation Options
Pressure-sensitive adhesive backing enables fast, reliable installation inside metallic enclosures without mechanical hardware.
Why Engineers Specify MR21
Lowers Cavity Q-Factor
Suppresses standing-wave resonance before interference can develop.
No Enclosure Redesign
Improves RF performance without changing enclosure geometry.
Multiple Configurations
Available in multiple thicknesses and installation formats for different frequency ranges.
Validated Performance
Every configuration is backed by engineering test data and AS9100D-certified quality systems.
MR21 Series · Technical Data Sheets
Engineering Data & Performance Downloads
Download configuration-specific Technical Data Sheets including reflectivity curves, attenuation performance, material properties, dimensional information, and installation recommendations.
Need all configurations at once? Download the complete MR21 Series datasheet bundle.
Work With Our Engineers
Need Help Selecting the Right MR21 Configuration?
Every enclosure behaves differently. Frequency, cavity dimensions, available space, and installation method all influence absorber performance. Our engineering team can recommend the optimal MR21 configuration for your application and provide supporting performance data.
