Electromagnetic interference protection for radomes

A cover for at least one antenna emitting or sensing electromagnetic radiation in at least one first frequency band, being radar frequency, the cover comprising:

• at least one first surface facing the antenna and at least one second surface averted to the antenna;
• at least one substrate being transmissible for electromagnetic radiation of the first frequency band and a second frequency band comprising visual light and at least one first coating covering the substrate in at least one first area, the first coating being transmissible for electromagnetic radiation of at least the first frequency band and being reflective for electromagnetic radiation falling onto the second surface and having a frequency within the second frequency band,
• wherein the first coating acts as a frequency selective surface bandpass filter trimmed such that electromagnetic radiation of the first frequency band is transmitted, whereas radiation in the second frequency band is reflected, and
• wherein the cover further comprises:
• at least one covering layer located on a side of the first coating being located averted to the substrate, the covering layer being transparent, at least semitransparent, for the second frequency band, or
• at least one second coating, at least partly located between the first coating on the one hand and the antenna on the other hand, the second coating being at least partly non transmissible and/or opaque in the second frequency band.