Antenna elements (23a, 23b) for a wireless unit (21) provided in a housing body (1) are sandwiched between a housing base (1A) and a housing cover (1B). The size and thickness of the apparatus housing are thus reduced, and the structure of installing the antenna elements (23a, 23b) is simplified into an economically advantageous structure. The antenna elements (23a, 23b) are provided, with the surfaces of their antenna patterns all exposed from the side walls of the housing body (1). It is hence possible to realize an antenna unit with stable and high performance without being electromagnetically influenced by components installed in the housing. |