Abstract
A wireless transmission technology uses a low frequency electromagnetic wave (100[Hz] ～ 10[kHz]) as a carrier wave to transmit signals in the deep underground geological condition. However, this electromagnetic wave has not been used so much, because the transmission capacity is less than a high frequency electromagnetic wave, which is used to televisions and cellular phones. On the other hand, the wireless transmission technology that doesn't use the cable is considered to be useful in the radioactive waste disposal repository from the viewpoint of decreasing the influence on the barrier. This paper shows the characteristics of the wirelesstransmission in the granite on the basis of the in situ testing implemented in the Äspö Hard Rock Laboratory of SKB.
