Patent ID: 8550393

Claim:
A recording tape cartridge comprising: a reel around which a recording tape is wound; an RFID tag that includes an antenna formed such that radiating portions are disposed at both sides of a power feed portion; and a case having a reel space in which the reel is housed, a power feed portion space in which a central portion of the antenna that includes a portion of the power feed portion is housed, and radiating portion spaces in which the radiating portions of the antenna are housed respectively; and boundary portions comprising an outer peripheral wall of the case, and a separating wall that stands at an inner side of the case, the separating wall partitioning the reel space from the power feed portion space and the radiating portion spaces, at least a portion of each radiating portion space being surrounded by the separating wall and the outer peripheral wall, and the separating wall and the outer peripheral wall not contacting either radiating portion.