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.

引用

页数：6

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