920 MHz band collinear type planar antenna. - Koichi Karasawa; Yuta Murayama; Toshiki Maki; Yuki Karasawa; Takahisa Karakama; Tutomu Kaneko (GCCE, 2013)

Spiral type planer antenna for specified low power radio. - Ryota Sasazawa; Toru Matsui; Toshiki Maki; Yuki Karasawa; Koichi Karasawa; Kazuki Ashida; Masahiro Akiyama; Takahisa Karakama; Tutomu Kaneko (GCCE, 2014)