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题名: Terahertz High-Gain Offset Reflector Antennas Using SiC and CFRP Material
作者: Wang, Hongjian; Dong, Xingchao; Yi, Min; Xue, Fei; Liu, Yang; Liu, Guang
作者部门: 微波遥感部
通讯作者: Dong, XC (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, Key Lab Microwave Remote Sensing, Beijing, Peoples R China.
关键词: Dual polarization ; electroforming ; silicon carbide (SiC) ; terahertz (THz) high-gain antenna ; three-coordinate test
刊名: IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
ISSN号: 0018-926X
出版日期: 2017
卷号: 65, 期号:9, 页码:4443-4451
收录类别: SCI
项目资助者: National High Technology Research and Development Program of China
英文摘要: Two high-gain terahertz (THz) offset reflector antennas are proposed. The silicon carbide material and thermally stable carbon fiber-reinforced plastic are selected as reflectors for high specific stiffness and low thermal expansion coefficient which are helpful for space use. Dual polarization is achieved by introducing a wire-grid polarizer which can separate the two THz polarization waves provided by multimode horns fabricated in electroforming technology. Furthermore, three-coordinate test system and theodolites are employed to detect the surface error of dishes and alignment of antenna subsystem. The physical optics analysis based on the measured reflector surface data is introduced referring to the large aperture antenna patterns by virtue of its accuracy and high efficiency. The results of this novel method are compared to that of the near-field test. Measurements show that the sidelobe levels (SLLs) of the single polarization silicon-based reflector are below -32 dB while the gain is 55.3 dB at 330 GHz, and the dual polarization carbon fiber-reinforced plastic reflector antenna suppresses the SLLs to -28 and -29 dB in two principal planes while the gain is 57.2 dB at the same frequency, respectively. The good performances of the proposed antennas indicate the potential for the application of space THz radiometer.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.nssc.ac.cn/handle/122/6023
Appears in Collections:微波遥感部_期刊论文

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