Performance Analysis of Circular Antenna Array for Microwave Interferometric Radiometers

	Performance Analysis of Circular Antenna Array for Microwave Interferometric Radiometers
	Wu, Ji; Zhang, Cheng; Liu, Hao; Yan, Jingye
刊名	IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
	2017
卷号	55 期号:6 页码:3261-3271
关键词	Antenna arrays circular arrays microwave radiometry synthetic aperture imaging
ISSN号	0196-2892
通讯作者	Zhang, C (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, CAS Key Lab Microwave Remote Sensing, Beijing 100190, Peoples R China.
英文摘要	The microwave interferometric radiometer (MIR) is a passive sensor using synthetic aperture technique for microwave remote sensing. It uses a thinned antenna array to replace the traditional large real aperture antenna, so as to reduce the antenna size, weight, and manufacturing difficulty, and further increase the spatial resolution of the instrument. The antenna array configuration is the first concern for the MIR application. Various array configurations have been proposed. Among them the arrays with hexagonal sampling grid such as the Y-shaped and hexagonal arrays have drawn more attention because of the higher sampling efficiency. However, they do not have the best performance in radiometric sensitivity and radio frequency interference (RFI) mitigation. This paper presents the detailed analysis of the circular array performance and compares it with the Y-shaped and hexagonal arrays. Based on the early developed theory about the radiometric resolution, two new factors named as sampling sensitivity factor and uncertainty factor are first introduced and defined in this paper, which can be used to quantitatively characterize the array performance. The main beam efficiency of the MIR is also redefined to prevent it being uncomfortably greater than unity but still keep a physical significance. Numerical simulations with analysis are finally implemented to verify the theoretical results and also to demonstrate the superiority of the circular array in terms of radiometric sensitivity and RFI mitigation.
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/6002]
专题	国家空间科学中心_微波遥感部
推荐引用方式 GB/T 7714	Wu, Ji,Zhang, Cheng,Liu, Hao,et al. Performance Analysis of Circular Antenna Array for Microwave Interferometric Radiometers[J]. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,2017,55(6):3261-3271.
APA	Wu, Ji,Zhang, Cheng,Liu, Hao,&Yan, Jingye.(2017).Performance Analysis of Circular Antenna Array for Microwave Interferometric Radiometers.IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,55(6),3261-3271.
MLA	Wu, Ji,et al."Performance Analysis of Circular Antenna Array for Microwave Interferometric Radiometers".IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 55.6(2017):3261-3271.