Patent ID: 8911351

Claim:
An antenna connection unit to which a plurality of receiving antennas for receiving a wireless signal transmitted from a capsule endoscope which is introduced into a subject to acquire image data inside the subject, is connectable, the antenna connection unit comprising: a received electric field strength detector configured to detect received strength of the wireless signal according to a plurality of pieces of input power from the plurality of receiving antennas; a correction parameter generation unit configured to cause the received electric field strength detector to input pieces of reference power as the pieces of input power, and to generate a received strength correction parameter for correcting the received strength which is obtained by the received electric field strength detector with respect to the pieces of input power from the plurality of receiving antennas, based on the pieces of reference power and the received strength detected by the received electric field strength detector according to the pieces of input power; and a storage unit for storing the received strength correction parameter generated by the correction parameter generation unit.