Ventilation Windows

Manufacturing Process of Electromagnetic Shielding Ventilation Windows

The manufacturing of an electromagnetic shielding ventilation window starts long before assembly.

Material selection comes first.

Metal sheets, honeycomb cores, waveguide structures.

Each batch is checked for conductivity, thickness, and surface condition.

Any material showing oxidation, contamination, or uneven thickness is removed from production.

Material preparation

Raw materials are cut to size based on design drawings.

Tolerance control is strict.

Deviation affects both airflow and shielding effectiveness.

Edges are deburred.

Surfaces are cleaned.

Oil, dust, and residue are removed before further processing.

For some designs, surface treatment is applied at this stage.

This improves corrosion resistance without compromising electrical contact.

Waveguide structure forming

The core of an electromagnetic shielding ventilation window is the waveguide structure.

This determines the cutoff frequency and attenuation performance.

Waveguide channels are formed using precision tooling.

Channel size, length, and spacing are controlled during forming.

Inconsistent geometry directly reduces shielding performance.

After forming, the structure is visually inspected.

Any deformation or incomplete channels are rejected.

Frame fabrication

Frames provide mechanical strength and electrical continuity.

They must maintain flatness to ensure proper contact during installation.

Frames are machined or stamped depending on design requirements.

Contact surfaces are kept clean and conductive.

Paint or coating is not allowed on bonding areas.

Fit between the frame and waveguide structure is checked before assembly.

Assembly process

Assembly is carried out in controlled conditions.

Waveguide cores are aligned with frames.

Misalignment creates gaps, which become EMI leakage paths.

Fastening is done using specified torque values.

Uneven tightening can distort the structure and affect airflow.

During assembly, operators verify:

Channel alignment

Frame flatness

Electrical continuity

Any unit failing inspection is reworked or scrapped.

Surface treatment and finishing

Depending on application, additional surface treatment may be applied.

This can include conductive coating or corrosion-resistant finishes.

Thickness is controlled.

Excess coating reduces conductivity.

Insufficient coating shortens service life.

Finished surfaces are inspected for coverage consistency.

Inspection and testing

Every electromagnetic shielding ventilation window undergoes inspection.

Mechanical dimensions are measured.

Visual defects are recorded.

Electrical continuity between components is checked.

Random samples may undergo shielding effectiveness testing based on project requirements.

Units that do not meet specifications are not released.

Packaging and handling

Finished products are cleaned before packaging.

Protective materials are used to prevent deformation during transport.

Batch information is recorded.

Material source, production date, and inspection status are traceable.

This ensures consistency across installations and long-term performance in communication equipment rooms.