Hiroshi Kijima received the B.S. degree in physics from Kwansei Gakuin University, Hyogo, Japan, in 2000, and the M.S. degree in materials science from Nara Institute of Science and Technology (NAIST), Nara, Japan, in 2002. In April 2002, he joined the Advanced Technology Development Laboratories, Sharp Corporation, Nara, Japan, where he has been engaged in the research and development of high-frequency analog circuits.