Abstract: The provision of of an electromagnetic wave absorbing apparatus having a broadband electromagnetic wave absorbing characteristic, and which can also be used for the improvement of existing electromagnetic wave absorbing apparatus. Successive layers of an sintered ferrite magnetic body (F), a dielectric body (D) having a low permittivity, and a magnetic body (RF) having a low magnetic permeability, are overlapped on a flat reflector plate, and the relationship between the magnetic permeability .mu.1 of the sintered ferrite magnetic body and the magnetic permeability of the magnetic body having a low magnetic permeability is .mu.1.gtoreq.25.multidot..mu.2.

Abstract: A magnetic transmission device using the edge-guided mode of propagation includes a magnetic dielectric slab having a conductor plate member mounted thereon adapted to be magnetized perpendicular to a ground plane on which the slab is placed. The conductor plate member is partially short-circuited to the ground plane.