An orientation of a mobile first antenna is determined based at least on sensor information. In order to achieve this object, according to the invention, a reference threshold to be used for error diffusion for a cyan component is obtained on the basis of a density value M of a magenta component. Each of the pad pattern and the photonic crystal patterns are made of a metal material, and the pad pattern is physically connected to the photonic crystal patterns. The mounting assembly may comprise a generally planar mounting plate having a plurality of apertures defined therein.