pbg - structure (18) comprisinga reference masses surface (2), andat least two masses via the reference surface (2), which are arranged alternating with one another passive filter structures (4) for suppressing the propagation of an electromagnetic wave in at least one direction (6) parallel to the reference surface (2, the compositions),characterized in thatthe pgb - structure (18) with respect to the direction (6) parallel to the reference mass surface (2) has an edge (5), by means of which the at the edge (5) of the filter structures (4) of the pbg - structure with the reference mass surface (2) are electrically connected.
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