EMI/RFI Shielded Ventilation Panels (3000 Series)
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The choice of the shielded honeycomb that best meets design considerations is based on three main criteria: Shielding, Air Flow and Mounting. For most applications, aluminum Code-32 honeycomb (properly installed using MAJR's mounting frame with integral EMI/RFI gasket) will provide a degree of attenuation that will be within specification limits (See Table 1). However, for the lower frequency range (H-Field) it may be necessary to specify MAJR's material Tin Plated Steel Code-44. Although heavier in weight than aluminum, an increase of 20-40dB H-field shielding effectiveness can be achieved in the lower frequency range by the use of the higher permeable-44 grade.
Common sides and mounting configurations are available. In all cases, the EMI gasket is supplied as an integral part of the vent assembly. Mounting of the vent to a shielded enclosure is accomplished by means of through holes supplied in the panel or captive fasteners located and installed to specific dimensions.