Abstract: In one aspect, a multi-layer absorber is disclosed, which comprises a proximal layer having a radiation-receiving surface adapted for receiving electromagnetic radiation, and a distal layer disposed adjacent the proximal layer to receive at least a portion of the received radiation, if any, transmitted through said proximal layer, wherein said proximal layer exhibits an index of refraction having a real part that is less than the real part of an index of refraction of the said distal layer for at least one frequency of the electromagnetic radiation in a range of about 1 GHz to about 110 GHz.

Abstract: In one aspect, a vent for use in an electronic device for absorbing electromagnetic radiation is disclosed, which includes a body comprising at least one thermoplastic polymer and a radiation-absorbing filler distributed within said thermoplastic polymer for absorbing electromagnetic radiation, said body further comprising a plurality of openings. The body is adapted for coupling to a frame of an electronic device to absorb electromagnetic radiation and to allow heat transfer via air flow through said openings between an interior of the frame and an external environment.

Abstract: In one aspect, a multi-layer absorber is disclosed, which comprises a proximal layer having a radiation-receiving surface adapted for receiving electromagnetic radiation, and a distal layer disposed adjacent the proximal layer to receive at least a portion of the received radiation, if any, transmitted through said proximal layer, wherein said proximal layer exhibits an index of refraction having a real part that is less than the real part of an index of refraction of the said distal layer for at least one frequency of the electromagnetic radiation in a range of about 1 GHz to about 110 GHz.

Abstract: In one aspect, a vent for use in an electronic device for absorbing electromagnetic radiation is disclosed, which includes a body comprising at least one thermoplastic polymer and a radiation-absorbing filler distributed within said thermoplastic polymer for absorbing electromagnetic radiation, said body further comprising a plurality of openings. The body is adapted for coupling to a frame of an electronic device to absorb electromagnetic radiation and to allow heat transfer via air flow through said openings between an interior of the frame and an external environment.

Abstract: In one aspect, a multi-layer absorber is disclosed, which comprises a proximal layer having a radiation-receiving surface adapted for receiving electromagnetic radiation, and a distal layer disposed adjacent the proximal layer to receive at least a portion of the received radiation, if any, transmitted through said proximal layer, wherein said proximal layer exhibits an index of refraction having a real part that is less than the real part of an index of refraction of the said distal layer for at least one frequency of the electromagnetic radiation in a range of about 1 GHz to about 110 GHz.

Abstract: In one aspect, a multi-layer absorber is disclosed, which comprises a proximal layer having a radiation-receiving surface adapted for receiving electromagnetic radiation, and a distal layer disposed adjacent the proximal layer to receive at least a portion of the received radiation, if any, transmitted through said proximal layer, wherein said proximal layer exhibits an index of refraction having a real part that is less than the real part of an index of refraction of the said distal layer for at least one frequency of the electromagnetic radiation in a range of about 1 GHz to about 110 GHz.