Military Ground Radar Manufacturer Required Custom EMI Shielding Vent for Cabinet

THE CHALLENGE
A manufacturer of mobile military ground radar systems required an air vent that would provide both high air flow and EMI shielding for an electronics enclosure cabinet on a ground vehicle.

DESIGN REQUIREMENTS
Paint must be camouflaged per MIL-DTL-64159
Airflow, EMI shielding, and tempest weather sealing
Highly custom gasket configurations

KEY CUSTOMER REQUIREMENTS
High air flow
Excellent EMI shielding
Color matching to customer chassis
High temp., humidity, and salt/corrosion
Environmental and weather sealing

CONCLUSION
Parker Chomerics designed a custom vent with additional EMI shielding and weather sealing gaskets for a mobile ground radar unit. Our in-house test services engineers put this design through a variety of performance tests including, temperature, humidity, salt fog/corrosion, and shielding.

The vent assembly passed both shielding tests, as well as the customer’s visual inspections of what occurred during tests such as humidity and salt fog/corrosion.  Overall, this was a successful qualification procedure. 

THE SOLUTION

Parker Chomerics designed a custom air vent featuring a tin/e. nickel plated, single layer 1/8in cell aluminum honeycomb. The single layer allowed for maximum airflow, with the plating providing high EMI shielding performance.

A CHO-SEAL® co-extruded EMI gasket was fitted into a groove in the vent frame. This gasket features a single, homogenous strip with one half being conductive and the other half providing weather sealing. Testing was performed and the assembly exceeded customer’s shielding and sealing requirements.