Metal mesh and expanded-metal screen
Woven or expanded metal used in wall build-ups, vents and window screens; attenuation depends on aperture size relative to wavelength, so a mesh that works at 900 MHz can leak badly at 5 GHz.
meshradiofrequency
Last verified 12 August 2026.
Also searched as: faraday mesh, shielding screen, wire mesh
- Form
- mesh
- Targets
- radiofrequency
- Grounding required
- Yes — ungrounded installation can make things worse
- Datasheet attenuation
- 20–40 dBaperture dependent; performance degrades as wavelength approaches aperture sizesources: sbm-2024
Failure modes
- Aperture too large for the frequency of interest: mesh is a low-pass structure
- Panels not bonded to each other, leaving slot antennas at every seam
- Corrosion at fixings destroys electrical continuity over time
Related records
- Shielding attenuation
Decibels of field reduction provided by a material. Every 10 dB is a factor of 10 in power density: 30 dB removes 99.9%, 10 dB removes 90%.
Quantities & units
Sources
- sbm-2024 Building Biology Evaluation Guidelines for Sleeping Areas (SBM-2024) — Institut für Baubiologie + Nachhaltigkeit (IBN), 2024. ngo, link checked 2026-08-12.
Same record, other formats