@techreport{oai:jaxa.repo.nii.ac.jp:00006277,
 author = {川原, 康介 and 鎌田, 幸男 and Kawahara, Kosuke and Kamata, Yukio},
 month = {Jan},
 note = {The BepiColombo is the international cooperation between ESA and JAXA in order to explore the planet Mercury. This mission comprises two science elements, MPO to be produced by ESA and MMO to be produced by JAXA. The MMO communication system has two antennas for X-band telemetry and command links. High Gain Antenna (HGA) pointed by Antenna Despun Motor (ADM) and Antenna Pointing Mechanism (APM) is normally used for communication. However, the beam-with of HGA is so narrow that the Medium Gain Antenna (MGA) is also onboard for emergency TLM and CMD link. The radiation characteristics of MGA are required for omnidirectional pattern in the spin plane, circular polarization and wide frequency band (about 17 percent). We propose Dual-reflector Antenna consists of parabola reflector and conical reflector as the MMO-MGA and manufactured EM-MGA last year. It provides a circular polarized donut-shaped radiation pattern and it's satisfied with requirements. This paper mainly reports about the electrical features of MGA and compares computed results with measurements., 資料番号: AA0049054021, レポート番号: JAXA-SP-05-008},
 title = {水星探査機(MMO)搭載用円偏波ドーナツビームアンテナの開発},
 year = {2006}
}