| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To suitably detect relative positional change between objects by performing radio communication by transmitting information on a very weak impulse train between the objects. <P>SOLUTION: A PN signal generator 2 generates a rectangular wave according to known PN codes by using a clock signal on a specified frequency outputted by a clock generator 1. After the rectangular wave is subjected to a matching process by an impedance matching circuit 6, it is sent to a radio transmission path through an antenna 7. Pulses can be outputted by waveform shaping by the antenna 7 out of the PN codes or alternative known digital signals even without use of a pulse generator. <P>COPYRIGHT: (C)2004,JPO&NCIPI</p> |
