EMI Shielding

HONYLITE Aluminium Honeycomb Air Ventilation Panels consist of an aluminum honeycomb foil held in a rigid extruded aluminum mounting frame. The foil, formed and laminated into a series of honeycomb cells that are glued and perforated or laser welded at the join, ensures a conductive path at each join. Although the foil is conductive in all directions, to enhance EMI performance, two pieces of honeycomb polarised at 90º to each other are recommended.

The honeycomb vent is series of tubes that acts as a waveguide, guiding electromagnetic waves into or out of the enclosure, but as the tubes are long enough then it attenuates those waves. Typically the tube should be at least 3 times as long as the diameter. Good practice is 4 times. Therefore a 3.2mm cell should be 12.7mm long. Honeycomb material is used because it offers high shielding performance, light weight and good airflow.

Ventilation panels are designed for use in electronic enclosures where good air flow is required for cooling and ventilation but where EMC compliance must be ensured.

Typical applications are:

1. Electronic Enclosures.
2. Air Conditioning Units.
3. Fan housings.
4. EMC Racks.
5. Communication shelters

Ventilation panels can be supplied with a range of finishes including:

1. Painted.
2. Tin or nickel plating.
3. Hexavalent chromium (RoHS compliant)

HONYLITE standard finish for aluminum vent panels fully meets the RoHS directive.