“…Figure 2 shows the concept of microwave power transmission to a MAV by a phased array antenna. Power is transmitted while a MAV is 1 Graduate student, Department of Advanced Energy, Kashiwanoha 5-1-5, Kashiwa 2 Graduate student, Department of Advanced Energy, Kashiwanoha 5-1-5, Kashiwa 3 Graduate student, Department of Aeronautics and Astronautics, Hongo 7-3-1, Bunkyo, Tokyo 4 Associate professor, Department of Advanced Energy, Kashiwanoha 5-1-5, Kashiwa, Chiba, Senior member 5 Professor, Department of Aeronautics and Astronautics, Hongo 7-3-1, Bunkyo, Tokyo, Senior member circling above the antenna. In our previous researches, [3,4] a fiveelement phased array antenna as shown in Fig.…”