MAST MF32 | Convoluted Foam RF Absorber
Broadband convoluted foam RF absorber
MAST MF32 is a lightweight, carbon-loaded convoluted polyether foam absorber with constant loading. The convoluted profile is used in RF test boxes, fixtures and cavities where a thicker broadband absorber is needed and a flat sheet is not the right geometry.
Reflection loss is measured on an NRL arch. See MAST Tech Bulletin 101 and the thickness-specific data sheets below for the laboratory plots. Those plots are laboratory results and are not a room or enclosure certification.
Key features
- Constant-loaded convoluted foam for broadband absorption
- Thicker profile than MF11 for cavities and RF test fixtures
- Optional 0.005 in pressure-sensitive adhesive (PSA) backing — order suffix 01
- RoHS compliant and halogen free
- Can be die-cut or CNC-cut; do not hot-wire, laser or grind
Typical applications
- RF test boxes and fixtures
- Antenna pattern control, sidelobe and backlobe reduction
- EMI reduction and Rx/Tx antenna isolation
- Radar cross-section reduction
Technical specifications
- Family: MF32 convoluted foam absorber, constant loading
- Colour: black
- Operating temperature: −60°F to 250°F (−51°C to 121°C)
- Power handling (3.0 in grade): 3 W/in²
- Standard sheet size: 24 × 24 in (610 × 610 mm)
- Formats: sheets, die-cut, kiss-cut pads
- Adhesive option: none (SKU suffix 00) or 0.005 in / 0.12 mm PSA (suffix 01)
- Electrical test method: NRL arch reflection loss (MAST Tech Bulletin 101)
Thickness / SKU
- MF32-0001-00 — 1.5 in (38.1 mm)
- MF32-0002-00 — 3.0 in (76.2 mm)
The best grade depends on the target frequency range, required attenuation and the maximum thickness the enclosure will accept. Confirm those three points before ordering.
Installation
Bond to a clean, dry, oil-free conductive surface using PSA or transfer adhesive. Vertical and overhead installs should be checked for absorber weight, substrate, environment and adhesive strength. Any facing, encapsulation or edge treatment should be reviewed, because it can change RF performance.
Cut with a steel-rule die or CNC. Heat, laser, hot-wire cutting and grinding can burn the foam and should not be used. Off-cuts are disposed of in accordance with local requirements. See the series SDS for handling.
Documents and test data
Each technical data sheet includes the NRL-arch reflection-loss plot for that thickness.
PDF: MF32-0001-00 technical data sheet (1.5 in)
PDF: MF32-0002-00 technical data sheet (3.0 in)
PDF: MF32 series safety data sheet
Aus Security Products personnel are not certified engineers and can only provide general support. This information should not be relied on or implemented in place of advice from a specialist consultant, RF engineer, electrician or other qualified technician. Manufacturer data sheets are based on laboratory testing and are not intended for design purposes. Each project is different. Confirm frequency range, thickness, substrate, adhesive and installation method for the specific enclosure or room. Your own testing for suitability will need to be carried out.
