Wireless communication system
A wireless communication system includes a first coupler having a first pair of electrodes and second coupler having a second pair of electrodes that at least partially oppose the first pair of electrodes. A transmission circuit applies a differential signal to the first coupler. A reception circuit receives a differential signal output from the second coupler based on electromagnetic coupling between the first coupler and the second coupler. A distance between centroids of the first pair of electrodes differs from a distance between centroids of the second pair of electrodes.
1. A wireless communication system comprising:
a first coupler having a first pair of electrodes;
a second coupler having a second pair of electrodes that at least partially oppose the first pair of electrodes;
a transmission circuit configured to apply a differential signal to the first coupler;
a reception circuit configured to receive a differential signal output from the second coupler based on electromagnetic coupling between the first coupler and the second coupler; and
a movement control unit configured to move at least one of the first coupler and the second coupler in a predetermined direction while maintaining a positional relationship in which the first pair of electrodes and the second pair of electrodes at least partially oppose each other,
wherein
a distance between centroids of the first pair of electrodes differs from a distance between centroids of the second pair of electrodes,
a first direction in which the centroids of the first pair of electrodes are connected substantially coincides with a second direction in which the centroids of the second pair of electrodes are connected,
the first pair of electrodes have substantially the same size and shape, and
the second pair of electrodes have substantially the same size and shape.
2. The system according to claim 1 ,
wherein a width of each of the first pair of electrodes in the first direction differs from a width of each of the second pair of electrodes in the second direction.
3. The system according to claim 1 ,
wherein the predetermined direction is substantially perpendicular to the first direction in which the centroids of the first pair of electrodes are connected.
4. The system according to claim 1 ,
wherein a length of each of the first pair of electrodes in the predetermined direction differs from a length of each of the second pair of electrodes in the predetermined direction.
5. The system according to claim 1 , wherein a first sum of widths of the first pair of electrodes and a distance therebetween differs from a second sum of widths of the second pair of electrodes and a distance therebetween.
6. The system according to claim 5 , wherein a smaller one of the first sum and the second sum is half or more the other one of the first sum and the second sum.
7. The system according to claim 1 , wherein the reception circuit is connected at a position on each one of the second pair of electrodes on the other electrode side relative to the centroid of the each one of the second pair of electrodes.
8. The system according to claim 1 , wherein the reception circuit is connected to the second pair of electrodes through respective vias.
9. The system according to claim 1 , further comprising a third coupler having a pair of third electrodes that at least partially oppose the second pair of electrodes.
10. The system according to claim 1 ,
wherein a first sum of widths of the first pair of electrodes and a distance therebetween is substantially equal to a second sum of widths of the second pair of electrodes and a distance therebetween,
the width of each of the first pair of electrodes is narrower than the width of each of the second pair of electrodes, and
the distance between the first pair of electrodes is longer than the distance between the second pair of electrodes.
11. The system according to claim 1 ,
wherein a second sum of widths of the second pair of electrodes and a distance therebetween is larger than a first sum of widths of the first pair of electrodes and a distance therebetween,
the width of each of the first pair of electrodes is narrower than the width of each of the second pair of electrodes, and
the distance between the first pair of electrodes is longer than the distance between the second pair of electrodes.
12. A method for controlling a wireless communication system that has a first coupler having a first pair of electrodes, and a second coupler having a second pair of electrodes that at least partially oppose the first pair of electrodes, the method comprising:
applying a differential signal to the first coupler;
receiving the differential signal output from the second coupler based on electromagnetic coupling between the first coupler and the second coupler; and
moving at least one of the first coupler and the second coupler in a predetermined direction while maintaining a positional relationship in which the first pair of electrodes and the second pair of electrodes at least partially oppose each other,
wherein
a distance between centroids of the first pair of electrodes differs from a distance between centroids of the second pair of electrodes,
a first direction in which the centroids of the first pair of electrodes are connected substantially coincides with a second direction in which the centroids of the second pair of electrodes are connected,
the first pair of electrodes have substantially the same size and shape, and
the second pair of electrodes have substantially the same size and shape.
13. A wireless communication system comprising:
a first coupler having a first pair of electrodes;
a second coupler having a second pair of electrodes that at least partially oppose the first pair of electrodes;
a transmission circuit configured to apply a differential signal to the first coupler; and
a reception circuit configured to receive a differential signal output from the second coupler based on electromagnetic coupling between the first coupler and the second coupler,
wherein
a distance between centroids of the first pair of electrodes differs from a distance between centroids of the second pair of electrodes,
a first direction in which the centroids of the first pair of electrodes are connected substantially coincides with a second direction in which the centroids of the second pair of electrodes are connected,
the first pair of electrodes have substantially the same size and shape,
the second pair of electrodes have substantially the same size and shape,
a second sum of widths of the second pair of electrodes and a distance therebetween is larger than a first sum of widths of the first pair of electrodes and a distance therebetween,
the width of each of the first pair of electrodes is narrower than the width of each of the second pair of electrodes, and
the distance between the first pair of electrodes is longer than the distance between the second pair of electrodes.
14. The system according to claim 13 ,
wherein a width of each of the first pair of electrodes in the first direction differs from a width of each of the second pair of electrodes in the second direction.
15. The system according to claim 13 , further comprising
a movement control unit configured to move at least one of the first coupler and the second coupler in a predetermined direction while maintaining a positional relationship in which the first pair of electrodes and the second pair of electrodes at least partially oppose each other,
wherein the predetermined direction is substantially perpendicular to the first direction in which the centroids of the first pair of electrodes are connected.
16. The system according to claim 15 ,
wherein a length of each of the first pair of electrodes in the predetermined direction differs from a length of each of the second pair of electrodes in the predetermined direction.
17. The system according to claim 13 , wherein the reception circuit is connected at a position on each one of the second pair of electrodes on the other electrode side relative to the centroid of the each one of the second pair of electrodes.
18. The system according to claim 13 , wherein the reception circuit is connected to the second pair of electrodes through respective vias.
19. The system according to claim 13 , further comprising a third coupler having a pair of third electrodes that at least partially oppose the second pair of electrodes.
20. A method for controlling a wireless communication system that has a first coupler having a first pair of electrodes, and a second coupler having a second pair of electrodes that at least partially oppose the first pair of electrodes, the method comprising:
applying a differential signal to the first coupler; and
receiving the differential signal output from the second coupler based on electromagnetic coupling between the first coupler and the second coupler,
wherein
a distance between centroids of the first pair of electrodes differs from a distance between centroids of the second pair of electrodes,
a first direction in which the centroids of the first pair of electrodes are connected substantially coincides with a second direction in which the centroids of the second pair of electrodes are connected,
the first pair of electrodes have substantially the same size and shape,
the second pair of electrodes have substantially the same size and shape,
a second sum of widths of the second pair of electrodes and a distance therebetween is larger than a first sum of widths of the first pair of electrodes and a distance therebetween,
the width of each of the first pair of electrodes is narrower than the width of each of the second pair of electrodes, and
the distance between the first pair of electrodes is longer than the distance between the second pair of electrodes.