| 摘要 |
<p>A position transducer and a position sensing method which permit the sensing of a coordinate of each position indicator without changing resonance frequencies of a plurality of position indicators. The position transducer is made up of a first group of antennas arranged one after the other in one of two directions which cross each other at right angles within a two-dimensional plane; a second group of antennas arranged one after the other in the other direction which is at right angles to the one direction within the two-dimensional plane, selection means for selecting an antenna capable of transmitting a more intensive electromagnetic wave to a position indicator to be measured compared with an electromagnetic wave sent to the other position indicators; transmission means for transmitting an electromagnetic wave to the position indicator to be measured from the selected antenna; and reception means for receiving a response electromagnetic wave while scanning the antennas by switching the first and second groups of antennas one after the other.</p> |
