Free-form two-mirror antenna for millimeter wave imaging

被引：2
作者：
Molebny, Vasyl [1 ]
Sokurenko, Vyacheslav [2 ]
Qiu, Jinghui [3 ]
机构：
[1] Acad Technol Sci Ukraine, Kiev, Ukraine
[2] NTUU Igor Sikorski Kyiv Polytech Inst, Kiev, Ukraine
[3] Harbin Inst Technol, Harbin, Peoples R China
来源：
PASSIVE AND ACTIVE MILLIMETERWAVE IMAGING XXIII | 2020年 / 11411卷
关键词：
millimeter wavelength imaging; free-form mirrors; free-form antenna reflectors; global optimization; adaptive Cauchy method; differential evolution algorithm; Zernike polynomials; OPTIMIZATION;
D O I：
10.1117/12.2565665
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Free-form two-mirror antenna for millimeter wave imaging has been modeled using a proprietary software for optical systems design PODIL. Optimization procedure is based on adaptive Cauchy differential evolution method, the principal features of which allow efficient global optimization. The system of two mirrors has the 300 mm aperture stop, and both mirrors have 380 mm the larger size. Their profiles are described by the 7th order Zernike polynomials. Pick-to-valley height difference is 18.037 mm and 35.60 mm for primary and secondary mirror correspondingly. The system allows 20-degree field of view. The RMS of the focal plane spot diagram is balanced with variations within 0,54 ... 0.64 mm. 90% of energy in the focal plane over the total field of view is contained within the quadratic zones with the sides 1.6 mm. The antenna can have a focusing function.
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页数：7
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