The realization of structures that do not scatter electromagnetic field, i.e. structures that appear invisible for EM waves is not a new concept. The possibility of a plane wave passing through some structure without distortions (i.e. with zero scattered field) has been investigated theoretically since 1960s (see e.g. [1]-[4]). Recently, the possibility of cloaking objects using a metamaterial cover has extensively been studied ([5]-[7]). In this approach, material has been ...