| 摘要 |
<p>PURPOSE:To automatically discriminate information written in a card without requiring troublesome man-power work such as the insertion of the card itself to an information discriminating equipment. CONSTITUTION:A card base material 1 is provided with plural reception antenna elements 2 for independently receiving plural kinds of information detecting radio wave S with different frequencies and plural transmission antenna elements 3 for respectively transmitting the second higher harmonic S' of radio wave received by the respective reception antenna elements 2. Then, the applying antenna element at one side, at least, of a reception antenna element and transmission antenna element 3 group is halfway interrupted in accordance with a previously decided information signal rule. As the information discriminating system of the information card 4, a transmitting means 6 transmits plural kinds of information detecting radio wave S with different frequencies to a inspection route 5 at a prescribed time interval and second higher harmonic S' within transmitted radio wave S, which is received by the reception antenna element 2 and transmitted from the transmission antenna element 3, is received by a receiving means 7 and analyzed by an information analyzing means 8.</p> |
