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- Summary:
- Question regarding the hole sizing of a mesh that should block RFID waves from passing through

For a project I am currently facing a problem that I find difficult to solve.

I am developing a shielding portal that uses a mesh to blocks UHF RFID signals. I would like to use aluminium mesh due to it being lightweight and its attenuation properties. The frequency of UHF RFID signals in the ETSI region is 868 MHz and I found that 900 MHz has a wavelength of 33.3cm. Other forums suggest a calculation that divides the wavelenght Lambda by 20 (https://www.researchgate.net/post/Is_steel_mesh_metal_a_good_shielding_to_RF).

That would mean that the max diameter of the mesh holes would be 1,665 CM.

Now I am really unsure if this is a right calculation and if this is the same for all materials. It would be great if someone is able to elaborate more on the principles of hole sizing and the frequency of RF waves.

I am developing a shielding portal that uses a mesh to blocks UHF RFID signals. I would like to use aluminium mesh due to it being lightweight and its attenuation properties. The frequency of UHF RFID signals in the ETSI region is 868 MHz and I found that 900 MHz has a wavelength of 33.3cm. Other forums suggest a calculation that divides the wavelenght Lambda by 20 (https://www.researchgate.net/post/Is_steel_mesh_metal_a_good_shielding_to_RF).

That would mean that the max diameter of the mesh holes would be 1,665 CM.

Now I am really unsure if this is a right calculation and if this is the same for all materials. It would be great if someone is able to elaborate more on the principles of hole sizing and the frequency of RF waves.