Glazing unit with frequency selective coating and method

A glazing unit comprising:

• a glass panel which is low in reflectance for RF radiation,
• a coating system which is high in reflectance for RF radiation disposed on the said glass panel, and
• at least one frequencies selective decoated portion of the coating system extending along a plane, P, defined by a longitudinal axis, X, and a vertical axis, Z;
• having a width, DW, measured along the longitudinal axis, X, and a length, DL, measured along the vertical axis, Z, comprising a first decoated element comprising a plurality of unit cells forming a regular grid of n rows by in columns unit cells, where m and n are positive integers higher than 1 (n>1 and m>1), and a plurality of second decoated elements wherein at least one second decoated element is placed in a unit cell of the first decoated element and wherein no second decoated element is in contact with the first decoated element,
• wherein at least one unit cell of the first decoated element has no second decoated element.