Position detecting apparatus and pointing device thereof

摘要: A position detecting system capable of making communications with a plurality pointing devices without changing resonance circuits said devices, and device suitable for the system. The detects positions at least two cordless on two-dimensional plane is equipped command electromagnetic wave transmitting circuit to transmit device. Included in are first group antennae X1 X11 arranged successively one directions orthogonal each other within 11, second Y1 Y8 direction selection for, from antenna groups, selecting an which more strongly coupled be measured than wave, transmission selected measured.