Publications of Astronomical Society of Japan 75(3) 567-583 2023年3月 [査読有り]
We built a Ka-band dual-circular-polarization low-noise receiver for the Misasa 54 m parabola antenna in Misasa, Japan. The antenna is designed to be combined with a transmitter and receiver system at the X band (around 8 GHz) and simultaneously w...
A projectile accelerated by the Hayabusa2 Small Carry-on Impactor successfully produced an artificial impact crater with a final apparent diameter of 14.5 ± 0.8 m on the surface of the near-Earth asteroid 162173 Ryugu on April 5, 2019. At the time...
K. Kagoshima   S. Takeda   Kazuki Ikeda   T. Kobayashi   Y. Kato   H. Iijima   A. Tomiki   T. Toda   
2012 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM (APSURSI) 2012年
A compact X/Ka bands feeder antenna has been proposed for a Cassegrain type reflector antenna board on a planetary exploration satellite. A sequentially rotated array in X band and a helical array in Ka band are employed for realizing the circular...