The purpose of this invention is to reproduce gradations of dark parts between devices with different ranges of reproducible brightness. A power splitter is composed of lumped elements and the values of the elements are digitally changed using switching means, in which the transmission loss of a signal is controlled according to whether the reader is in a transmission state or a reception state. To be able to compensate for misalignment between the layers of the laminated body, the drilled hole in an outer layer is drilled with a larger diameter than in a further layer of the laminated body.