I see professional advice to help to attenuate a highly directional interference.
We have a large (~3m) satellite dish antenna for collecting earth observation data. This antenna rotates to scan the sky and works in an 8 GHz band. Unfortunately, a point to point wireless link interferes with the reception during certain hours, and we cannot shut them down due to difficult legal processes.
We have built a metallic wire mesh screen, but it seems to have only a low effect (maybe because of mesh cell size or overall size ... but we are unfortunately limited due to the wind load).
We are considering using frequency selecting structures (FSS) or metamaterials/metasurface to create "negative gain" and thus attenuate the waves coming from the specific direction of the interferer.
Would you mind suggesting some good references to assist with designing such a low-wind-load structure, or perhaps better ideas?
With thanks,
Albert Lysko
You need a mesh of less than 1 cm hole size to significantly attenuate 8 GHz, as the wavelength is 3.75 cm, and it will go through anything wider than 2 cm without any problem, because this is bigger than 1/2 wavelength. If you know the polarization, or can find it out, a screen of wires parallel to the E-field, with 5 mm spacing, will have a large effect.
Dear Colleague,
hope this will help
https://www.researchgate.net/topic/Antennas
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