Microwave Absorbers
Microwave absorbers are increasingly being used to enhance shielding performance at higher frequencies. Laird Technologies’ microwave absorber product line includes die-cut elastomers, foam, thermoplastics and custom solutions to aid in solving a wide variety of problems such as internal cavity resonances, antenna pattern shaping and high-frequency interference.
Whatever the problem, Laird Technologies can design a solution.
| All dimensions shown in inches (millimeters) unless otherwise specified |
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| Product Highlights | • Can be used at higher frequencies than traditional shielding • Can be used with other shielding to extend frequency range • Variety of types for custom solutions • Easy installation with pressure sensitive adhesive into noisy cavities • Can be used for reducing both EMI and radar cross section • Internal EMI reduction, cavity resonance reduction, used in conjunction with board level shielding |
| SHIELDING EFFECTIVENESS Transfer Impedance (500 MHz) |
N/A |
| H-field (200 KHz) Mil 285 | N/A |
| Plane Wave (2 GHz) Mil 285 | N/A |
| Surface Resistivity | N/A |
| Volume Resistivity | N/A |
| Available Size Range | Offered in 24 x 24 (609,6 x 609,6) sheets, as a die cut or kiss cut component |
| Deflection Operating Range | N/A |
| Compression Force (based on shape selection) |
N/A |
| Compression Set | N/A |
| Joint Unevenness Accommodation | N/A |
| Compound/Material Availability | Microwave absorbing elastomers (Q-Zorb) are offered in silicone, nitrile, natural rubber, urethane, Viton®, neoprene, Hypalon® and fluorosilicone. Microwave absorber foam is an urethane-based open cell foam. |
| Temperature Range | Q-Zorb -85–350°F (-65–175°C) RF Foam -85–250°F (-65–120°C) |
| Available Profiles | Q-Zorb Thicknesses 0.010 - 0.375 (0,25 - 9,53) RF Foam Thicknesses 0.125 - 4.5 (3,18 - 114,3) |
| Mounting Methods | Pressure sensitive adhesive |
| Custom Shapes Available | Indefinite die cut shapes and molded parts |
| Fluid Seal | Moisture, rain, jet fuel, nuclear biological chemical (NBC), UL, compounds |
| Air/Dust | Available in limited applications |
| Galvanic Compatibility | Many compounds available for galvanic and environmental compatibility |
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Typical Applications for Shielding Gaskets |
• Antenna sidelobe reduction • Surface current suppression • Applied directly to the top of high speed CPU, LSI and Ics • Suppresses crosstalk • Improves antenna gain in RFID applications • Radar cross section reduction |
