High frequency wave glass antenna for an automobile
View Patent ↗In a high frequency wave glass antenna for an automobile, wherein an antenna conductor and an antenna-conductor-side feeding electrode connected to the antenna conductor are provided to a laminated glass sheet for an automobile, the laminated glass sheet comprising two glass sheets bonded through a bonding layer, and wherein a receiver-side feeding electrode is disposed at a position to confront the antenna-conductor-side feeding electrode and on a car-interior-side surface of the laminated glass; each of the antenna-conductor-side feeding electrode and the receiver-side feeding electrode has an area of from 140 to 2,500 mm 2 .
1. A high frequency wave glass antenna for an automobile, comprising:
two glass sheets, the glass sheets being bonded through a bonding layer to form a laminated glass sheet for an automobile;
an antenna conductor;
an antenna-conductor-side feeding electrode connected to the antenna conductor;
the antenna conductor and the antenna-conductor-side feeding electrode being disposed between the two glass sheets; and
a receiver-side feeding electrode disposed at a position to confront the antenna-conductor-side feeding electrode and on a car-interior-side surface of the laminated glass;
wherein the antenna conductor is configured to receive at least one of a digital television broadcasting frequency band and a UHF television broadcasting frequency band;
wherein each of the antenna-conductor-side feeding electrode and the receiver-side feeding electrode has an area of from 49 to 2,500 mm 2 ; and
wherein a distance between the antennas-conductor-side feeding electrode and the receiver-side feeding electrode is set so that both electrodes form at least one of electromagnetic coupling and capacitive coupling; and
wherein a received signal excited in the antenna conductor is transmitted through the antenna-conductor-side feeding electrode to the receiver-side feeding electrode.
2. The glass antenna according to claim 1 , wherein each of the antenna-conductor-side feeding electrode and the receiver-side feeding electrode has an area of from 140 to 2,500 mm 2 .
3. The glass antenna according to claim 1 , wherein the area of the antenna-conductor-side feeding electrode is from 0.5 to 1.5 times that of the receiver-side feeding electrode.
4. The glass antenna according to claim 1 , wherein the laminated glass sheet comprises a car-interior-side glass sheet and a car-exterior-side glass sheet; and
wherein the antenna-conductor-side feeding electrode and the receiver-side feeding electrode have the car-interior-side glass sheet interposed therebetween.
5. The glass antenna according to claim 1 , wherein the laminated glass sheet comprises a car-interior-side glass sheet and a car-exterior-side glass sheet; and
wherein the antenna-conductor-side feeding electrode and the receiver-side feeding electrode have the car-interior-side glass sheet and an interlayer film interposed therebetween, the interlayer film comprising a synthetic resin film.
6. The glass antenna according to claim 1 , wherein the laminated glass sheet comprises a car-interior-side glass sheet, a car-exterior-side glass sheet and an interlayer film, the interlayer film being interposed between the car-interior-side glass sheet and the car-exterior-side glass sheet, the interlayer film comprising a synthetic resin film; and
wherein the antenna-conductor-side feeding electrode is disposed on a surface of the car-interior-side glass sheet close to the interlayer film or on a surface of the car-exterior-side glass sheet close to the interlayer film.
7. The glass antenna according to claim 1 , wherein the laminated glass sheet has a shielding layer disposed on the car-interior-side surface; and wherein the receiver-side feeding electrode is disposed on the shielding layer.
8. The glass antenna according to claim 1 , wherein at least one of the antenna-conductor-side feeding electrode and the receiver-side feeding electrode is formed in a square shape, a substantially square shape, a circular shape, a substantially circular shape, an oval shape or a substantially oval shape.
9. The glass antenna according to claim 1 , wherein a received carrier wave contains a frequency of from 470 to 704 MHz.
10. The glass antenna according to claim 1 , wherein a received carrier wave contains a frequency of from 473 to 767 MHz.
11. The glass antenna according to claim 1 , wherein a received carrier wave contains a frequency of from 450 to 750 MHz.
12. The glass antenna according to claim 1 , wherein a received carrier wave contains a frequency of from 698 to 806 MHz.
13. A laminated glass sheet of an automobile, including two glass sheets, the glass sheets being bonded through a bonding layer to form the laminated glass sheet for an automobile, and the antenna conductor, and the antenna-conductor-side feeding electrode and the receiver-side feeding electrode defined in claim 1 .
14. A high frequency wave glass antenna for an automobile, comprising:
two glass sheets, the glass sheets being bonded through a bonding layer to form a laminated glass sheet for an automobile;
an antenna conductor;
an antenna-conductor-side feeding electrode connected to the antenna conductor;
the antenna conductor and the antenna-conductor-side feeding electrode being disposed between the two glass sheets; and
a receiver-side feeding electrode disposed at a position to confront the antenna-conductor-side feeding electrode and on a car-interior-side surface of the laminated glass;
wherein the antenna conductor is configured to receive at least one of a digital television broadcasting frequency band and a UHF television broadcasting frequency band;
wherein each of the antenna-conductor-side feeding electrode and the receiver-side feeding electrode has an area of from 49 to 2,500 mm 2 ;
wherein a shortest distance between the receiver-side feeding electrode and an edge of an opening formed in a car body is from 1.8 to 50.0 mm;
wherein a distance between the antenna-conductor-side feeding electrode and the receiver-side feeding electrode is set so that both electrodes form at least one of electromagnetic coupling and capacitive coupling; and
wherein a received signal excited in the antenna conductor is transmitted through the antenna-conductor-side feeding electrode to the receiver-side feeding electrode.
15. The glass antenna according to claim 14 , wherein when each of the antenna-conductor-side feeding electrode and the receiver-side feeding electrode has an area of from 49 to 144 mm 2 , the shortest distance between the receiver-side feeding electrode and the edge of the opening formed in the car body is from 1.8 to 28 mm.
16. The glass antenna according to claim 14 , wherein a received carrier wave contains a frequency of from 473 to 767 MHz.
17. The glass antenna according to claim 14 , wherein a received carrier wave contains a frequency of from 698 to 806 MHz.
18. A high frequency wave glass antenna for an automobile, comprising:
two glass sheets, the glass sheets being bonded through a bonding layer to form a laminated glass sheet for an automobile;
an antenna conductor;
an antenna-conductor-side feeding electrode connected to the antenna conductor;
the antenna conductor and the antenna-conductor-side feeding electrode being disposed between the two glass sheets; and
a receiver-side feeding electrode disposed at a position to confront the antenna-conductor-side feeding electrode and on a car-interior-side surface of the laminated glass;
wherein each of the antenna-conductor-side feeding electrode and the receiver-side feeding electrode has an area of from 49 to 2,500 mm 2 ;
wherein a distance between the antenna-conductor-side feeding electrode and the receiver-side feeding electrode is from 1.50 to 6.00 mm; and
wherein the distance between the antenna-conductor-side feeding electrode and the receiver-side feeding electrode is related to a transmission efficiency of a received signal to be transmitted from the antenna-conductor-side feeding electrode to the receiver-side feeding electrode, such that the distance is determined so as to prevent the transmission efficiency from being brought close to a minimum value when the transmission efficiency changes, having the minimum value and a maximum value according to the distance.
19. The glass antenna according to claim 18 , wherein the distance between the antenna-conductor-side feeding electrode and the receiver-side feeding electrode is determined so as to satisfy the following formula:
maximum value≧transmission efficiency≧(1/3) (2×maximum value+minimum value).
20. The glass antenna according to claim 18 , wherein the distance between the antenna-conductor-side feeding electrode and the receiver-side feeding electrode is from 1.50 to 2.72 mm or from 2.87 to 6.00 mm.
21. A laminated glass sheet of an automobile, including two glass sheets, the glass sheets being bonded through a bonding layer to form the laminated glass sheet for an automobile, and the antenna conductor, the antenna-conductor-side feeding electrode and the receiver-side feeding electrode defined in claim 6 .
22. A high frequency wave glass antenna for an automobile, comprising:
two glass sheets, the glass sheets being bonded through a bonding layer to form a laminated glass sheet for an automobile;
a first antenna conductor;
a first antenna-conductor-side feeding electrode connected to the first antenna conductor;
the first antenna conductor and the first antenna-conductor-side feeding electrode being disposed between the two glass sheets;
a second antenna conductor;
a second antenna-conductor-side feeding electrode connected to the second antenna conductor;
the second antenna conductor and the second antenna-conductor-side feeding electrode being disposed between the two glass sheets;
a first receiver-side feeding electrode disposed at a position to confront the first antenna-conductor-side feeding electrode and on a car-interior-side surface of the laminated glass; and
a second receiver-side feeding electrode disposed at a position to confront the second antenna-conductor-side feeding electrode and on the car-interior-side surface of the laminated glass;
wherein a distance between the first antenna-conductor-side feeding electrode and the second antenna-conductor-side feeding electrode is from 6 to 100 mm.
23. The glass antenna according to claim 22 , wherein each of the first antenna-conductor-side feeding electrode, the second antenna-conductor-side feeding electrode, the first receiver-side feeding electrode and the second receiver-side feeding electrode has an area of from 49 to 2,500 mm 2 .
24. The glass antenna according to claim 22 , wherein the laminated glass sheet has a shielding layer disposed on the car-interior-side surface; and wherein at least one of the first receiver-side feeding electrode and the second receiver-side feeding electrode is disposed on the shielding layer.
25. The glass antenna according to claim 22 , wherein at least one selected among the first antenna-conductor-side feeding electrode, the second antenna-conductor-side feeding electrode, the first receiver-side feeding electrode and the second receiver-side feeding electrode is formed in a shape selected among a square shape, a substantially square shape, a circular shape, a substantially circular shape, an oval shape and a substantially oval shape.
26. The glass antenna according to claim 22 , wherein a received carrier wave contains a frequency of from 473 to 767 MHz.
27. The glass antenna according to claim 22 , wherein a received carrier wave contains a frequency of from 698 to 806 MHz.
28. A high frequency wave glass antenna for an automobile, comprising:
two glass sheets, the glass sheets being bonded through a bonding layer to form a laminated glass sheet for an automobile;
a first antenna conductor;
a first antenna-conductor-side feeding electrode connected to the first antenna conductor;
the first antenna conductor and the first antenna-conductor-side feeding electrode being disposed on a car-interior-side surface of the laminated glass sheet;
a second antenna conductor;
a second antenna-conductor-side feeding electrode connected to the second antenna conductor;
the second antenna conductor and the second antenna-conductor-side feeding electrode being disposed between the two glass sheets;
a receiver-side feeding electrode disposed at a position to confront the second antenna-conductor-side feeding electrode and on the car-interior-side surface of the laminated glass;
wherein a distance between the first antenna-conductor-side feeding electrode and the receiver-side feeding electrode is from 2.5 to 100 mm.
29. The glass antenna according to claim 28 , wherein the distance between the first antenna-conductor-side feeding electrode and the receiver-side feeding electrode is from 4 to 100 mm.
30. The glass antenna according to claim 28 , wherein each of the first antenna-conductor-side feeding electrode, the second antenna-conductor-side feeding electrode and the receiver-side feeding electrode has an area of from 49 to 2,500 mm 2 .
31. The glass antenna according to claim 28 , wherein the laminated glass sheet has a shielding layer disposed on the car-interior-side surface; and wherein at least one selected among the first antenna conductor, the first antenna-conductor-side feeding electrode and the receiver-side feeding electrode is disposed on the shielding layer.
32. The glass antenna according to claim 28 , wherein at least one selected among the first antenna-conductor-side feeding electrode, the second antenna-conductor-side feeding electrode and the receiver-side feeding electrode is formed in a shape selected among a square shape, a substantially square shape, a circular shape, a substantially circular shape, an oval shape and a substantially oval shape.
33. The glass antenna according to claim 28 , wherein a received carrier wave contains a frequency of from 473 to 767 MHz.
34. The glass antenna according to claim 28 , wherein a received carrier wave contains a frequency of from 698 to 806 MHz.