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Proceedings Paper

Development of multi-beam Fourier phase grating at 660 GHz
Author(s): Daixi Zhang; Yuan Ren; Dong Liu; Kangmin Zhou; Wei Miao; Wen Zhang; Shengcai Shi
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Paper Abstract

Fourier phase gratings play a vital role in the multi-beam heterodyne receiver in sub-millimeter astronomical instruments. In this study, a 1×4 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 μm, measurement results exhibit a good agreement with simulation in both power efficiency and far-field spatial distribution.

Paper Details

Date Published: 18 November 2019
PDF: 6 pages
Proc. SPIE 11196, Infrared, Millimeter-Wave, and Terahertz Technologies VI, 1119605 (18 November 2019); doi: 10.1117/12.2536737
Show Author Affiliations
Daixi Zhang, Purple Mountain Observatory (China)
Key Lab. of Radio Astronomy (China)
Univ. of Science and Technology of China (China)
Yuan Ren, Purple Mountain Observatory (China)
Key Lab. of Radio Astronomy (China)
Dong Liu, Purple Mountain Observatory (China)
Key Lab. of Radio Astronomy (China)
Kangmin Zhou, Purple Mountain Observatory (China)
Key Lab. of Radio Astronomy (China)
Wei Miao, Purple Mountain Observatory (China)
Key Lab. of Radio Astronomy (China)
Wen Zhang, Purple Mountain Observatory (China)
Key Lab. of Radio Astronomy (China)
Shengcai Shi, Purple Mountain Observatory (China)
Key Lab. of Radio Astronomy (China)


Published in SPIE Proceedings Vol. 11196:
Infrared, Millimeter-Wave, and Terahertz Technologies VI
Cunlin Zhang; Xi-Cheng Zhang; Masahiko Tani, Editor(s)

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