[20a-E312-1~10] 6.2 Carbon-based thin films

△ [20a-E312-7] Dependence on Distance and Depth of Seawater Wireless Communication utilizing Diamond Solution Gate FET as a Receiver

〇(B)Teruaki Takarada¹, Kaito Tadenuma¹, Yutaro Iyama¹, Yu Hao Chang¹, Yukihiro Shintani¹, Hiroshi Kawarada^1,2 (1.Waseda Univ., 2.Zaiken.)

Keywords:diamond, FET, Seawater communication

We have reported that seawater wireless communication utilizing Diamond Solution Gate FETs (SGFETs) which operates without gate insulation film in electrolyte solution. SGFETs respond to AC voltage v_G applied to Reference Electrode. In the previous work, attenuation of the signal by distance was observed because of a large solution resistance due to using a tube with a small cross section. In this work, we used a vessel with a large cross section to reduce solution resistance. It was confirmed that attenuation of the signal by distance was suppressed. Also, signal was not attenuated by depth of SGFET from Reference Electrode.