Antenna configured to conform to a transparent surface, corresponding display device and electronic payment device
There is proposed an antenna configured to conform to a transparent surface. Such an antenna includes at least one electrically conductive strand extending along the surface, a cross-section of the at least one electrically conductive strand has a height, in a direction orthogonal to the surface, that is greater than a width in a direction parallel to the surface.
1. An antenna configured to conform to a transparent surface, said antenna comprising:
at least one electrically conductive strand extending along said surface,
wherein said at least one electrically conductive strand has a cross-section which has a height, in a direction orthogonal to said surface, that is at least five times greater than a width in a direction parallel to said surface.
2. The antenna according to claim 1 wherein said at least one electrical conductive strand is in contact with a first transparent medium having an optical index n 1 >1.4 at a level of at least one first contact zone extending at least partly perpendicularly to said surface.
3. The antenna according to claim 2 , wherein:
said first transparent medium comprises a matrix of electrically conductive strands comprising said at least one electrically conductive strand, and
said conformed antenna results from a preliminary electrical interconnection of a plurality of electrically conductive strands of said matrix.
4. The antenna according to claim 1 wherein:
said at least one electrical conductive strand is in contact with a second transparent medium having an optical index n 2 ≥1 at a level of at least one second contact zone extending at least partly perpendicularly to said surface,
the second transparent medium being in contact with a first transparent medium having an optical index n 1 >n 2 at a level of at least one first contact zone extending at least partly perpendicularly to said surface,
said first and second contact zones each having at least one region facing each other.
5. The antenna according to claim 4 wherein said second transparent medium is air.
6. The antenna according to claim 4 wherein a surface zone of said first transparent medium is polished at the level of said at least one first contact zone.
7. The antenna according to claim 1 , wherein the at least one electrically conductive strand comprises at least two electrically conductive strands, and said antenna is composed of the at least two electrically conductive strands, which form two electrical pathways placed in parallel.
8. The antenna according to claim 1 , which is sized to receive and radiate an electromagnetic wave at a carrier frequency of 13.56 MHz.
9. A display device comprising:
a display screen comprising an external reading surface corresponding forming a transparent surface; and
an antenna conformed to the external reading surface of said display screen,
the antenna comprising:
at least one electrically conductive strand extending along said external reading surface, wherein said at least one electrically conductive strand has a cross-section which has a height, in a direction orthogonal to said external reading surface, that is at least five times greater than a width in a direction parallel to said external reading surface.
10. An electronic payment device comprising the display device according to claim 9 .