干旱区生态环境知识资源中心(Arid): Deployment mechanism for a L-band helix antenna in 1-Unit Cubesat

Arid

DOI	10.1016/j.actaastro.2020.09.005
	Deployment mechanism for a L-band helix antenna in 1-Unit Cubesat
	Fernandez, Lara; Sobrino, Marco; Milian, Oriol; Aguilella, Andrea; Solanellas, Arnau; Badia, Marc; Francesc Munoz-Martin, Joan; Adria Ruiz-de-Azua, Joan; Sureda, Miquel; Camps, Adriano
通讯作者	Fernandez, L
来源期刊	ACTA ASTRONAUTICA
ISSN	0094-5765
EISSN	1879-2030
出版年	2022
卷号	196 页码:394-399
英文摘要	Recently, there is a renewed interest in Earth Observation (EO) of the cryosphere as a proxy of global warming, soil moisture for agriculture and desertification studies, and biomass for carbon storage. Global Navigation Satellite System-Reflectometry (GNSS-R) and L-band microwave Radiometry have been used to perform these measurements. However, it is expected that the combination of both can largely improve current observations. (3)Cat-4 mission aims at addressing this technology challenge by integrating a combined GNSS-R and Microwave Radiometer payload into a 1-Unit CubeSat. One of the greatest challenges is the design of an antenna that respects the envelope and stowage requirements of 1-Unit CubeSat, being able to work in the different frequency bands: Global Positioning System (GPS) L1-band (1575 MHz), GPS L2-band (1227 MHz), and microwave radiometry at 1400-1427 MHz. After a trade-off analysis, a helix antenna was found to be the most suitable option. This antenna has 11 turns equally distributed with 68.1 mm of diameter. This design generates an antenna with 506 mm of axial length, providing the maximum radiation gain in the endfire direction. Additionally, a counterweight is added at the tip of the antenna to enhance the directivity, and it is used as gravity gradient technique. The deployment of this antenna in vacuum and extreme temperature conditions is the greatest mechanical challenge that needs to be addressed for the success of the mission. This work presents a mechanical solution that enables to deploy the helix antenna from 25.5 mm (stowed configuration) to the final 506 mm (deployed configuration). By sequentially deploying different parts of the antenna, the final configuration is reached without impacting the attitude pointing of the CubeSat. This is accomplished using dyneema lines that are melted sequentially by commands. In addition, the deployment velocity, acceleration, and waving are presented as part of its characterization. The current test results in a Thermal Vacuum Chamber indicate also that the deployment can be achieved in -35 degrees C. The (3)Cat-4 CubeSat, with the L-band helix antenna, will be launched in Q4 2020 as part of the ''Fly Your Satellite!'' program of the European Space Agency (ESA).
英文关键词	CubeSat Nanosatellite Helix Deployable Antenna
类型	Article ; Proceedings Paper
语种	英语
开放获取类型	Green Submitted
收录类别	SCI-E ; CPCI-S
WOS记录号	WOS:000810028200006
WOS关键词	GNSS-R ; EARTH OBSERVATION ; RADIOMETER ; MISSION
WOS类目	Engineering, Aerospace
WOS研究方向	Engineering
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/391525
推荐引用方式 GB/T 7714	Fernandez, Lara,Sobrino, Marco,Milian, Oriol,et al. Deployment mechanism for a L-band helix antenna in 1-Unit Cubesat[J],2022,196:394-399.
APA	Fernandez, Lara.,Sobrino, Marco.,Milian, Oriol.,Aguilella, Andrea.,Solanellas, Arnau.,...&Camps, Adriano.(2022).Deployment mechanism for a L-band helix antenna in 1-Unit Cubesat.ACTA ASTRONAUTICA,196,394-399.
MLA	Fernandez, Lara,et al."Deployment mechanism for a L-band helix antenna in 1-Unit Cubesat".ACTA ASTRONAUTICA 196(2022):394-399.