Antenna device based on transparent substrate and method of configuring antenna device
An antenna device based on a transparent substrate and a method of configuring an antenna device are provided. The antenna device includes a transparent substrate, a first dielectric layer, and an antenna. The transparent substrate includes a first surface and a second surface opposite to the first surface. The first dielectric layer includes a third surface and a fourth surface opposite to the third surface, wherein the first dielectric layer is in contact with the first surface via the third surface to be disposed on the transparent substrate, wherein a permittivity of the first dielectric layer is less than a permittivity of the transparent substrate. The antenna includes a radiation part, wherein the radiation part is disposed on one of the second surface and the fourth surface.
1. An antenna device based on a transparent substrate, comprising:
a transparent substrate comprising a first surface and a second surface opposite to the first surface;
a first dielectric layer comprising a third surface and a fourth surface opposite to the third surface, wherein the first dielectric layer is in contact with the first surface via the third surface to be disposed on the transparent substrate, wherein a permittivity of the first dielectric layer is less than a permittivity of the transparent substrate;
an antenna comprising a radiation part, wherein the radiation part is disposed on one of the second surface and the fourth surface; and
an anti-reflection layer covering the transparent substrate, the first dielectric layer, and the antenna, wherein a first refractive index of the anti-reflection layer is less than a second refractive index of the transparent substrate.
2. The antenna device of claim 1 , further comprising:
a second dielectric layer in contact with the second surface to be disposed on the transparent substrate, wherein a permittivity of the second dielectric layer is less than the permittivity of the transparent substrate.
3. The antenna device of claim 2 , further comprising:
a first ground layer comprising a fifth surface, wherein the first ground layer is in contact with the second dielectric layer via the fifth surface to be disposed on the second dielectric layer.
4. The antenna device of claim 3 , wherein the radiation part is disposed on the fourth surface, wherein the antenna device further comprises:
a third dielectric layer comprising a sixth surface and a seventh surface opposite to the sixth surface, wherein the third dielectric layer is in contact with the first ground layer via the sixth surface to be disposed on the first ground layer, wherein
a feeding part of the antenna is disposed on the seventh surface.
5. The antenna device of claim 4 , wherein
the first ground layer comprises a slot, wherein the slot is overlapped with a part of a projection of the radiation part on the feeding part.
6. The antenna device of claim 3 , wherein the radiation part is disposed on the fourth surface, wherein the antenna further comprises:
a feeding part disposed on the fourth surface and electrically connected to the radiation part.
7. The antenna device of claim 6 , further comprising:
a third dielectric layer disposed on the first ground layer, wherein the feeding part is electrically connected to the third dielectric layer through a via.
8. The antenna device of claim 7 , wherein the first ground layer comprises a slot, wherein the via is extended from the feeding part to the third dielectric layer via the slot.
9. The antenna device of claim 1 , wherein the radiation part is disposed on the fourth surface, wherein the antenna further comprises:
a feeding part disposed in the first dielectric layer and in contact with the transparent substrate, wherein the feeding part is electrically connected to the radiation part through a via.
10. The antenna device of claim 1 , wherein the radiation part comprises a first radiation unit disposed at the fourth surface and a second radiation unit disposed in the first dielectric layer and in contact with the transparent substrate, wherein the first radiation unit is electrically connected to the second radiation unit through a via, wherein the antenna further comprises:
a feeding part disposed in the first dielectric layer and in contact with the transparent substrate, wherein the feeding part is electrically connected to the second radiation unit.
11. The antenna device of claim 1 , wherein the radiation part is disposed on the fourth surface, wherein the antenna device further comprises:
a second ground layer comprising a slot and disposed between the radiation part and a feeding part of the antenna, wherein the feeding part is disposed in the first dielectric layer and in contact with the transparent substrate, wherein
the slot is overlapped with a part of a projection of the radiation part on the feeding part.
12. The antenna device of claim 1 , wherein the radiation part comprises a slot.
13. The antenna device of claim 1 , wherein the antenna comprises a mesh wire.
14. The antenna device of claim 13 , wherein a ratio of a linewidth to a thickness of the mesh wire is greater than or equal to 0.5 and less than or equal to 5.
15. The antenna device of claim 1 , further comprising:
a via, wherein a taper angle of the via is greater than or equal to 40 degrees and less than or equal to 85 degrees.
16. The antenna device of claim 1 , further comprising:
a via, wherein a ratio of a via diameter to a length of the via is greater than or equal to 0.5 and less than or equal to 5.
17. The antenna device of claim 1 , wherein the permittivity of the first dielectric layer is greater than or equal to 2 and less than or equal to 4.
18. The antenna device of claim 1 , wherein the anti-reflection layer comprises a porous structure or a moth-eye structure.
19. A method of configuring an antenna device based on a transparent substrate, wherein the antenna device comprises a transparent substrate having a first surface and a second surface opposite to the first surface, a first dielectric layer having a third surface and a fourth surface opposite to the third surface, and an antenna having a radiation part, wherein the method comprises:
bringing the third surface of the first dielectric layer in contact with the first surface of the transparent substrate to dispose the first dielectric layer on the transparent substrate, wherein a permittivity of the first dielectric layer is less than a permittivity of the transparent substrate;
disposing the radiation part of the antenna on one of the second surface of the transparent substrate and the fourth surface of the first dielectric layer; and
covering the transparent substrate, the first dielectric layer, and the antenna by an anti-reflection layer, wherein a first refractive index of the anti-reflection layer is less than a second refractive index of the transparent substrate.