What are EMI Shielded Aluminum Honeycomb Vent Panels and Why You Need It

EMI shielded vents are used when there is a need for ventilation within mechanical components without compromising the machine performance to EMI interference. These vents are designed to offer maximum electromagnetic interference shielding while maintaining a minimum pressure drop in the components. They come in different shapes, sizes, and designs. Vent manufacturers offer the choice of personalizing the items according to the requirement. Aluminum honeycomb vent panels are the most popular components in such fields due to its high attenuation feature. Its capability to handle high EMI shielding performance by adding more layers to the frame is yet another reason behind its wide application. Let us discuss about this particular type of EMI shielded vent panel and know if it is the right choice or not.elect-therm-material-big

What is Aluminum Honeycomb Air Ventilation?

Aluminum honeycomb air ventilation panels are designed with aluminum foil that comes mounted with a fixed aluminum frame. Aluminum foil goes through a series of processes to form honeycomb design, the cells are glued or wielded together to ensure performance and longevity. After completion of the manufacturing process, the cells show a conductive path through each cell joint. After the design process is complete, the manufacturer may choose to fine-tune it by adding a series of material. This is done to primarily add features like protection from corrosion and to improve its  conductivity.

How does it Work?

An aluminum honeycomb EMI shielded ventilation component is actually a collection of tubes. These tubes guide EMI waves i, or keep them out of the components. These tubes or cells are generally three times lengthier than the cell diameter to block/choke the EMI waves successfully. When EMI travels through these hexagon cells, some of it is absorbed by the metal itself while the rest is reflected. Often multiple layers of honeycombs are added within one frame to enhance the performance of the vent. Although, aluminum panels are used in high EMI shielding requirement projects, if magnetic frequencies are involved, users would be better served with steel cell honeycomb vent.

Features and Applications of Aluminum Honeycomb Air Ventilation

These vents are designed to offer low resistance on air-flow in the electronic enclosures. Here are a few of its features:

  • These panels come with 30, 45, 60 and 90 degree angles
  • The series of honeycomb cells are either fixed using an adhesive and perforated or are laser welded at the joins
  • The honeycomb cells are angled to direct the air-flow and protect the component from direct rain
  • Corners come fully welded
  • Frame styles can be designed to incorporate one or multiple layers
  • Finishing can be done with tin, nickel plating, aluminum passivation process, Trivalent chromium or hexavalent  chromium
  • Vents can be added with insect screens or dust filters according to preference
  • Cell size and polarization can be personalized to enhance performance
  • Vents can be equipped with weld mesh or expanded aluminum kick plates
  • Different mounting methods can be followed for the desired results

These features offer users a lot of options to personalize their EMI shielded vent for better performance. Now let us discuss about the application choices for Aluminum honeycomb air ventilation.

  • Air conditioners
  • EMC racks
  • Communication shelters
  • Electronic enclosures
  • Fan housings

Effectiveness of EMI shielded vents depends on their size, gasket type and finish. If you are partial to circular frames for electromagnetic interference shielding, then aluminum honeycomb vents are your best choice because they can be easily personalized into preferred designs. Plus, aluminum honeycomb design is lightweight, making it easy to install, maintain, and repair (when needed).

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