Wireless communication device and method carried out by wireless communication device

A method carried out by a wireless communication device, the wireless communication device including:

• a wireless communication device including a housing configured to hold a wireless communication controller;
• a first antenna disposed inside the housing and coupled to the wireless communication controller, the first antenna having a low electric field intensity in some of directions departing from the wireless communication device due to attenuation or blockage of radio wave by the housing;
• and
• a second antenna disposed inside the housing and coupled to the wireless communication controller, the second antenna having higher electric field intensity than the first antenna in a strength-declining direction where the first antenna has a lowest electric field intensity, wherein the second antenna comprises a relay antenna configured to exchange a radio wave with the first antenna, and an antenna coupled to the relay antenna to exchange a radio wave with an external device,
• the method comprising:
• exchanging radio waves with an external device using both the first antenna and the second antenna, the first antenna and the second antenna being controlled by the wireless communication controller.

A wireless communication device comprising:

• a housing configured to hold a wireless communication controller;
• a first antenna disposed inside the housing and coupled to the wireless communication controller, the first antenna having low electric field intensity in some of directions departing from the wireless communication device due to attenuation or blockage of radio wave by the housing;
• and
• a second antenna coupled to the wireless communication controller, the second antenna having higher electric field intensity than the first antenna in a strength-declining direction where the first antenna has lowest electric field intensity,
• wherein the second antenna comprises a relay antenna capacitively-coupled to the first antenna, and an antenna coupled to the relay antenna to exchange a radio wave with an external device, and
• the second antenna is coupled to the wireless communication controller through the first antenna.