机载红外与合成孔径雷达共孔径天线设计

吴文达; 张葆; 洪永丰; 张玉鑫

doi:10.3788/CO.2019-0160

Volume 13 Issue 3

Jun. 2020

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Chinese Optics > 2020 > 13(3): 595-604.

WU Wen-da, ZHANG Bao, HONG Yong-feng, ZHANG Yu-xin. Design of co-aperture antenna for airborne infrared and synthetic aperture radar[J]. Chinese Optics, 2020, 13(3): 595-604. doi: 10.3788/CO.2019-0160

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WU Wen-da, ZHANG Bao, HONG Yong-feng, ZHANG Yu-xin. Design of co-aperture antenna for airborne infrared and synthetic aperture radar[J]. Chinese Optics, 2020, 13(3): 595-604. doi: 10.3788/CO.2019-0160

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Design of co-aperture antenna for airborne infrared and synthetic aperture radar

doi: 10.3788/CO.2019-0160

WU Wen-da^{1, 2, 3
,},
ZHANG Bao^{1, 3
,
,},
HONG Yong-feng^{1, 3},
ZHANG Yu-xin^{1, 2, 3}

1.
Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China
3.
Key Laboratory of Airborne Optical Imaging and Measurement, Chinese Academy of Sciences, Changchun 130033, China

Funds: Supported by National Natural Science Foundation of China (Grant No.61705225)

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Corresponding author: cleresky@vip.sina.com
Received Date: 26 Jul 2019
Rev Recd Date: 13 Aug 2019
Publish Date: 01 Jun 2020

Abstract

Abstract

In order to adapt to increasingly complex detection environments and detection requirements, airborne detection platforms often integrate multiple detection systems. As an ideal integration method, the common aperture composite not only combines the advantages of various types of detection systems, but also reduces the total volume of the system and reduces the burden on the platform. In this paper, a Cassegrain-type common-aperture antenna of infrared and Synthetic Aperture Radars (SAR) is calculated and designed. Firstly, the primary mirror is calculated according to the radar design requirements; then, the Cassegrain structure is designed by equations consisting of aberration coefficients and aspheric parameters; next, under the limitation of the front Cassegrain structure, the cold stop parameters and infrared system parameters, the lens parameters of the infrared system are calculated by the aberration formula in PW form. The proposed radar antenna has a diameter of 1.22 m and a gain of 40.9 dB. The infrared system has a focal length of −1 000 mm and a full field of view of 0.704°. The obscuration ratio of the secondary mirror is less than 0.33, and the MTF value is greater than 0.4 for each temperature level at 33 lp/mm. All the parameters of the proposed co-aperture antenna meet the requirements of expected applications.
- optical design,
- antenna design,
- infrared and SAR with common aperture,
- cold heading matching

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References(20)

References

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