Antenna module disposed in vehicle
A vehicle comprises: vehicular glass including a transparent region and an opaque region; a transparent dielectric substrate disposed in the transparent region of the vehicular glass; a first area including an antenna on one side surface of the transparent dielectric substrate; and a second area including a power supply pattern and a ground conductive pattern electrically connected to the antenna. The antenna may comprise: a first slot formed between a signal pattern and a first ground pattern and configured to radiate a first signal having a circularly polarized wave in a first frequency band; and a second slot formed between the first ground pattern and a second ground pattern and configured to radiate a second signal having a circularly polarized wave in a second frequency band lower than the first frequency band.
1. A glass assembly comprising:
a transparent area;
an opaque area formed outer to the transparent area; and
an antenna assembly disposed at the glass assembly,
wherein the antenna assembly comprises:
a first transparent dielectric substrate;
an antenna pattern disposed in a first area of the first transparent dielectric substrate that is disposed in the transparent area of the glass assembly;
a connection pattern connected to the antenna pattern and disposed in a second area of the first transparent dielectric substrate that is disposed in the opaque area of the glass assembly; and
a second dielectric substrate disposed in the opaque area of the glass assembly,
wherein the second dielectric substrate comprises a ground conductive pattern and a feed pattern,
wherein the antenna pattern comprises:
a signal pattern connected to the feed pattern of the second dielectric substrate and a first ground pattern connected to the ground conductive pattern of the second dielectric substrate, to form a first slot between the signal pattern and the first ground pattern, the first slot configured to radiate a first signal having circular polarization in a first frequency band; and
a second ground pattern connected to the ground conductive pattern of the second dielectric substrate to form a second slot between the first ground pattern and the second ground pattern, the second slot configured to radiate a second signal having circular polarization in a second frequency band lower than the first frequency band,
wherein the second ground pattern is configured to surround the first ground pattern.
2. The glass assembly of claim 1 , wherein at least a portion of an outer boundary of the first ground pattern is formed in a circular shape, and
wherein a diameter of the outer boundary of the first ground pattern is in a range between ¼ and ½ of a wavelength corresponding to the first frequency band.
3. The glass assembly of claim 1 , wherein a first portion of an inner boundary of the first ground pattern is formed in a circular shape,
wherein a second portion of the inner boundary of the first ground pattern is formed with straight lines in a first direction and a second direction, and
wherein the first ground pattern is formed with a first width in the first direction and a second width in the first direction narrower than the first width.
4. The glass assembly of claim 1 , wherein a width of the second ground pattern in one direction is in a range of 11 mm to 14 mm.
5. The glass assembly of claim 1 , wherein a second gap between an inner boundary of the second ground pattern and an outer boundary of the first ground pattern is in a range of 3 mm to 6 mm.
6. The glass assembly of claim 1 , wherein a portion of an outer boundary of the first ground pattern is formed in a circular shape, and
wherein a portion of an inner boundary of the second ground pattern is formed with straight lines.
7. The glass assembly of claim 6 , wherein a portion of an outer boundary of the second ground pattern is formed with straight lines.
8. The glass assembly of claim 1 , wherein the ground conductive pattern comprises:
a first portion connected to a first end of the first ground pattern; and
a second portion connected to a second end of the first ground pattern,
wherein the feed pattern is formed between the first portion and the second portion of the ground conductive pattern.
9. The glass assembly of claim 8 , wherein the ground conductive pattern further comprises:
a third portion connected to the first portion of the ground conductive pattern; and
a fourth portion connected to the second portion of the ground conductive pattern,
wherein the third portion and the fourth portion of the ground conductive pattern form an outer boundary of the antenna assembly.
10. The glass assembly of claim 9 , wherein the ground conductive pattern further comprises:
a fifth portion connected to the fourth portion of the ground conductive pattern and a first end of the second ground pattern; and
a sixth portion connected to the third portion of the ground conductive pattern and a second end of the second ground pattern,
wherein the fifth portion and the sixth portion of the ground conductive pattern further form the outer boundary of the antenna assembly.
11. The glass assembly of claim 1 , wherein the antenna pattern is formed as a metal mesh structure,
wherein the antenna assembly further comprises dummy mesh grid patterns,
wherein the dummy mesh grid patterns are disposed in the first area of the first transparent dielectric substrate, and
wherein the dummy mesh grid patterns include:
first dummy mesh grid patterns disposed in the first slot; and
second dummy mesh grid patterns disposed in the second slot.
12. A glass assembly comprising:
a transparent area;
an opaque area formed outer to the transparent area; and
an antenna assembly disposed at the glass assembly,
wherein the antenna assembly comprises:
a first transparent dielectric substrate disposed at the transparent area of the glass assembly;
an antenna pattern disposed in a first area of the first transparent dielectric substrate that is disposed in the transparent area of the glass assembly;
a connection pattern connected to the antenna pattern and disposed in a second area of the first transparent dielectric substrate that is disposed in the opaque area of the glass assembly; and
a second dielectric substrate disposed in the opaque area of the glass assembly,
wherein the second dielectric substrate comprises a ground conductive pattern and a feed pattern,
wherein the antenna pattern comprises:
a signal pattern connected to the feed pattern of the second dielectric substrate and a first ground pattern connected to the ground conductive pattern of the second dielectric substrate to form a first slot between the signal pattern and the first ground pattern, the first slot configured to radiate a first signal having circular polarization in a first frequency band;
a second ground pattern electrically connected to the ground conductive pattern and spaced apart from the ground conductive pattern of the second dielectric substrate to form a second slot between the first ground pattern and second ground pattern, the second slot configured to radiate a second signal having circular polarization in a second frequency band lower than the first frequency band,
wherein the second ground pattern is configured to surround the first ground pattern.
13. The glass assembly of claim 12 , wherein the ground conductive pattern comprises:
a first portion connected to a first end of the first ground pattern; and
a second portion connected to a second end of the first ground pattern,
wherein feed pattern is formed between the first portion and the second portion of the ground conductive pattern.
14. The glass assembly of claim 13 , wherein the ground conductive pattern comprises:
a third portion connected to the first portion of the ground conductive pattern; and
a fourth portion connected to the second portion of the ground conductive pattern,
wherein the third portion and the fourth portion of the ground conductive pattern form an outer boundary of the antenna assembly.
15. The glass assembly of claim 14 , wherein the ground conductive pattern further comprises:
a fifth portion connected to the fourth portion of the ground conductive pattern and spaced apart from a first end of the second ground pattern by a first gap; and
a sixth portion connected to the third portion of the ground conductive pattern and spaced apart from a second end of the second ground pattern by another first gap,
wherein the first gap is formed within a range of 1.5 mm or less.
16. The glass assembly of claim 15 , wherein both sides of the second ground pattern each comprises a third gap.
17. The glass assembly of claim 12 , wherein at least a portion of an outer boundary of the first ground pattern is formed in a circular shape, and
wherein a diameter of the outer boundary of the first ground pattern is in a range between ¼ and ½ of a wavelength corresponding to the first frequency band.
18. The glass assembly of claim 12 , wherein a first portion of an inner boundary of the first ground pattern is formed in a circular shape,
wherein a second portion of the inner boundary of the first ground pattern is formed with straight lines, and
wherein the first ground pattern is formed with a first width and a second width that is narrower than the first width.
19. The glass assembly of claim 12 , wherein a width of the second ground pattern is formed within a range of 11 mm to 14 mm.
20. The glass assembly of claim 12 , wherein the antenna pattern is formed as a metal mesh structure,
wherein the antenna assembly further comprises dummy mesh grid patterns,
wherein the dummy mesh grid patterns are disposed in the first area of the first transparent dielectric substrate, and
wherein the dummy mesh grid patterns include:
first dummy mesh grid patterns disposed in the first slot and
second dummy mesh grid patterns disposed in the second slot.