In order to prevent moisture and dirt from entering the feed system, the feed horn aperture is closed with a feed window. Depending on the diameter of the aperture, the frequency and the internal overpressure, different materials have to be used. MIRAD can provide you either with a customized pre-cut of your feed window according to your sketch or with sheets of Kapton™, CoreTex™ or Sefar tissue. Do not hesitate to contact us.