Zobrazeno 1 - 10
of 118
pro vyhledávání: '"Hiraku Sakamoto"'
Publikováno v:
IEEE Access, Vol 12, Pp 58562-58572 (2024)
This paper proposes a stretchable-substrate-impregnated fabric for deployable high-gain antenna for small satellites. Constellations of small satellites offer worldwide coverage of wireless communication and earth observation; high-gain antennas are
Externí odkaz:
https://doaj.org/article/22125a140e034a89b47c2575f1233027
Autor:
Dongwon You, Xiaolin Wang, Hans Herdian, Xi Fu, Hojun Lee, Michihiro Ide, Carrel Da Gomez, Zheng Li, Jill Mayeda, Daisuke Awaji, Jian Pang, Hiraku Sakamoto, Kenichi Okada, Atsushi Shirane
Publikováno v:
IEEE Access, Vol 11, Pp 69522-69535 (2023)
Lightweight and deployable phased arrays are important in Small-Satellite (Small-Sat) constellation systems to reduce price and increase link distance. This article proposes a Ka-band deployable active phased-array TX on a 4-layer liquid crystal poly
Externí odkaz:
https://doaj.org/article/2b5df4792ff74b50a8781df57720b464
Publikováno v:
IEEE Access, Vol 9, Pp 54101-54108 (2021)
Membrane reflectarray antennas with flexible support structures realize low weight and low stowage volume. However, deformation of the reflectarray membrane generally degrades antenna gain. We propose electrical misalignment compensation for 5.8-GHz-
Externí odkaz:
https://doaj.org/article/80f3da1b3f68409fa26fd9bf6e703097
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 84, Iss 863, Pp 17-00566-17-00566 (2018)
This study aims to develop an actively deformable space antenna system for radio astronomy around 100GHz. In order to reduce the thermal deformation in active control mechanisms composed of multiple materials, a method to cancel the mismatch of the c
Externí odkaz:
https://doaj.org/article/05b5474969664063ba23771196645bcd
Autor:
Hiraku SAKAMOTO
Publikováno v:
Journal of the Japan Society for Precision Engineering. 89:36-40
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5b7ce009596f0a3189b0090e1832a859
https://doi.org/10.2493/jjspe.89.36
https://doi.org/10.2493/jjspe.89.36
Autor:
Dongwon You, Xi Fu, Hans Herdian, Xiaolin Wang, Yasuto Narukiyo, Ashbir Aviat Fadila, Hojun Lee, Michihiro Ide, Sena Kato, Zheng Li, Yun Wang, Daisuke Awaji, Jian Pang, Hiraku Sakamoto, Kenichi Okada, Atsushi Shirane
Publikováno v:
IEEE Microwave and Wireless Technology Letters. :1-4
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e6652a3e6eb38875c63910470d52b26c
https://doi.org/10.1109/lmwt.2023.3264810
https://doi.org/10.1109/lmwt.2023.3264810
Publikováno v:
Journal of Guidance, Control, and Dynamics. 45:280-295
Electromagnetic formation flight (EMFF) uses the electromagnetic force to control the relative positions of multiple satellites without using conventional fuel-based propulsion. To compensate for t...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b6d0ee42e8be9bd550474d57cb47984
https://doi.org/10.2514/1.g005873
https://doi.org/10.2514/1.g005873
Publikováno v:
Acta Astronautica. 190:334-341
Multifunctional membrane space structures have been developed in the past to realize solar arrays, array antennas, and other applications. However, the deployment of a folded membrane often requires fluctuating forces with high peaks, caused by the s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::943e6d687c0420cabaeae0ab754a8395
https://doi.org/10.1016/j.actaastro.2021.09.037
https://doi.org/10.1016/j.actaastro.2021.09.037
Publikováno v:
AIAA Journal. 59:1075-1086
In this paper, the deployed shape of spinning square solar sails was investigated through dynamic nonlinear finite element analysis of the full model of the solar power sail of the world’s first so...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bcb00971a6f04239425e5d6d4c295f08
https://doi.org/10.2514/1.j059717
https://doi.org/10.2514/1.j059717
Autor:
Xiaolin Wang, Dongwon You, Xi Fu, Hojun Lee, Zheng Li, Daisuke Awaji, Jian Pang, Atsushi Shirane, Hiraku Sakamoto, Kenichi Okada
Publikováno v:
2022 IEEE/MTT-S International Microwave Symposium - IMS 2022.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a7086d5e1f4abcc524b5160b455b1a2e
https://doi.org/10.1109/ims37962.2022.9865668
https://doi.org/10.1109/ims37962.2022.9865668