Wireless communication apparatus and wireless communication system

A wireless communication system comprising:

• a wireless communication apparatus comprising a plurality of differential coil pairs that respectively transmit and receive differential signals to and from a plurality of external differential coil pairs, through magnetic coupling, a marker portion having a predetermined relative position with respect to the differential coil pairs, and a first electrode section that is provided at a position where the differential coil pairs are not arranged, wherein
• one coil in a first differential coil pair among the differential coil pairs is provided at a distance from each of two coils of a second differential coil pair among the differential coil pairs that is less than or equal to a distance between the two coils of the second differential coil pair, and
• the other coil of the first differential coil pair is provided at a distance from each of the two coils of the second differential coil pair that is greater than the distance between the two coils of the second differential coil pair;
• and
• an access apparatus that communicates with the wireless communication apparatus, and comprises:
• the plurality of external differential coil pairs,
• a reference position portion having a predetermined relative position with respect to the external differential coil pairs and operable to engage with the marker portion,
• a second electrode section that is operable to contact the first electrode section so that the first electrode section and the second electrode section are electrically connected, and
• an aligning section that adjusts the relative positions of the marker portion and the reference position portion, wherein
• when the first electrode section is connected to the second electrode section, the relative position of the differential coil pair and the corresponding external coil pair is held so that a magnetic coupling between the differential coil pair and the corresponding external coil pair is achieved.