US 11,456,775 B2 · Slotted electrically conductive structure for improving indoor penetration of wireless communication signal

Abstract

A slotted electrically conductive structure attachable to a substrate and configured to enhance penetration of an incidental radio wave through the substrate is disclosed. The structure allows a substantial portion of the incidental radio wave to penetrate from a first region to a second region through the substrate. The slotted electrically conductive structure comprises a metallic base layer of transparent metal or metal oxide; and one or more patterned slots provided on the metallic base layer. Each of the patterned slots comprises a plurality of feature elements covering an entire area of the patterned slot. The structure reduces thermal energy loss through the substrate and the plurality of feature elements is configured to allow the incidental radio wave to pass through the slotted electrically conductive structure. A multilayer structure comprising the slotted electrically conductive structure and a film structure having randomly distributed irregularly shaped protrusions or pits is also provided.

Claims22

Dependent claims

A multilayer structure having a stack of two structures arranged in any order attachable to a first surface of a substrate having a first dielectric constant and configured to enhance penetration of an incidental radio wave with a wavelength λ through the substrate by allowing a substantial portion of the incidental radio wave to penetrate from a first region having a second dielectric constant to a second region through the substrate, the two structures comprising a slotted electrically conductive structure and a film structure for converging the incidental radio wave to a focal point or a focal area in the second region, wherein:

the slotted electrically conductive structure comprises:
a metallic base layer of transparent metal or metal oxide;
an adhesive layer for attaching the metallic base layer to the substrate;
and
one or more patterned slots provided on the metallic base layer, wherein each of the patterned slots comprises a plurality of feature elements covering an entire area of the patterned slot, wherein:
the metallic base layer not covered by the plurality of feature elements has a reduced thermal energy loss and a problem of signal blockage and reflection;
and
the plurality of feature elements is configured to allow the incidental radio wave to pass through the slotted electrically conductive structure;
the film structure comprises:
a bottom layer of transparent material;
and
a plurality of irregularly shaped protrusions distributing randomly across the film structure and protruding from the bottom layer;
each of the irregularly shaped protrusions has a height less than 2λ and a width less than 2λ;
the substrate, after attaching the film structure thereon, has a third dielectric constant and is configured to converge the incidental radio wave to the focal point or the focal area in the second region;
and
the third dielectric constant has a value closer to the second dielectric constant.

13 more elements

the slotted electrically conductive structure comprises:
a metallic base layer of transparent metal or metal oxide;
an adhesive layer for attaching the metallic base layer to the substrate;
and
one or more patterned slots provided on the metallic base layer, wherein each of the patterned slots comprises a plurality of feature elements covering an entire area of the patterned slot, wherein:
the metallic base layer not covered by the plurality of feature elements has a reduced thermal energy loss and a problem of signal blockage and reflection;
and
the plurality of feature elements is configured to allow the incidental radio wave to pass through the slotted electrically conductive structure;
the film structure comprises:
a bottom layer of transparent material;
and
a plurality of irregularly shaped pits distributing randomly across the film structure and engraved from the bottom layer;
each of the irregularly shaped pits has a depth less than 2λ and a width less than 2λ;
the substrate, after attaching the film structure thereon, has a third dielectric constant and is configured to converge the incidental radio wave to the focal point or the focal area in the second region;
and
the third dielectric constant has a value closer to the second dielectric constant.

13 more elements

Dependencies are inferred from the claim text.

Slotted electrically conductive structure for improving indoor penetration of wireless communication signal

Life of this patent

Slotted electrically conductive structure for improving indoor penetration of wireless communication signal

Life of this patent

Abstract

Claims22