Development of multi-beam Fourier phase grating at 660 GHz

被引：0
|
作者：
Zhang, Daixi [1 ,2 ,3 ]
Ren, Yuan [1 ,2 ]
Liu, Dong [1 ,2 ]
Zhou, Kangmin [1 ,2 ]
Miao, Wei [1 ,2 ]
Zhang, Wen [1 ,2 ]
Shi, Shengcai [1 ,2 ]
机构：
[1] Chinese Acad Sci, Purple Mt Observ, 10 YuanHua Rd, Nanjing 210033, Peoples R China
[2] Chinese Acad Sci, Key Lab Radio Astron, 10 YuanHua Rd, Nanjing 210033, Peoples R China
[3] Univ Sci & Technol China, 96 Jinzhai Rd, Hefei 230026, Peoples R China
来源：
INFRARED, MILLIMETER-WAVE, AND TERAHERTZ TECHNOLOGIES VI | 2019年 / 11196卷
基金：
美国国家科学基金会; 国家重点研发计划;
关键词：
Fourier phase grating; multi-beam receiver; power distribution; ARRAY; GENERATION;
D O I：
10.1117/12.2536737
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Fourier phase gratings play a vital role in the multi-beam heterodyne receiver in sub- millimeter astronomical instruments. In this study, a 1x4 beam grating at 660 GHz is developed, by which the surface structure is generated with an iterative algorithm. Far-field beam pattern is simulated with FEKO, where a relative high efficiency of 91% as well as a uniformity of power distribution among 4 beams of less than 1% are obtained. The grating was manufactured in aluminum material by a micro-milling machine. A PC-controlled scanning stage is employed for the beam pattern measurement. Despite the discrepancy from the manufacture of less than 6 mu m, measurement results exhibit a good agreement with simulation in both power efficiency and far-field spatial distribution.
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收藏
页数：6
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