Communications system of a vehicle

A decoating method for decoating a glazing unit, the glazing unit comprising:

• a glass panel comprising a glass sheet which is low in reflectance for RF radiation, the glass panel comprising a bent portion with an axis of curvature Acmn;
• a coating system which is high in reflectance for RF radiation disposed on the glass sheet over at least a part of the bent portion,
• the decoating method comprising:
• decoating a frequency selective surface on the coating system by decoating a matrix of decoated grids, Gmn, connected together two-by-two and edge-to-edge;
• each of the plurality of decoated grids having decoated regions in a form of grid lines arranged in a mesh-like manner;
• each of the plurality of decoated grids having a rectangular generic shape with a length (LMn) and a width (Wmn);
• the decoating being performed by using a laser apparatus having a scan field, Lmax, and a zone Rayleigh, Za,
• wherein each of the plurality of decoated grids is inscribed in a specific rectangle Rmn having a length LRmn and a width WRmn which is paralleled to the axis of curvature Acmn;
• each of the plurality of decoated grids being oriented by an angle αmn to the corresponding specific rectangle;
• wherein a width Wmn
• Wmn
• =
• WRmn
• *
• cos
• ⁢
• α
• ⁢
• mn
• -
• LRmn
• *
• sin
• ⁢
• α
• ⁢
• mn
• (
• cos
• 2
• ⁢
• α
• ⁢
• mn
• -
• sin
• 2
• ⁢
• α
• ⁢
• mn
• )
• wherein a length Lmn
• Lmn
• =
• LRmn
• -
• Wmn
• *
• sin
• ⁢
• α
• ⁢
• mn
• cos
• ⁢
• α
• ⁢
• mn
• and wherein:
• WRmn is from 50% up to 100% of a minimum between Lmax and Wr wherein Wr=2*sqrt(2*Za*Rmn−Za2);
• LRmn is from 50% up to 100% of Lmax;
• Rmn corresponds to a radius of the glass sheet at the corresponding specific rectangle of a decoated grid Gmn measured in an axis of the length;
• and
• αmn≠kπ/2 wherein k is an odd number.