A New Layout of Wide Swath Synthetic Aperture Array

Abstract

In order to meet the high-resolution and highsensitivity requirements of the synthetic aperture microwave radiometer, the research on the antenna array layout technology with wide swath and low coupling is carried out. This paper focuses on the analysis of specifications such as the spatial arrangement of the array, baseline design and pointing accuracy. Based on the rectangular grid sampling arrays such as T-shaped array, cross-shaped array and square array, the layout of remote dislocation and angular rotation arrangement is adopted. The method increases the non-aliasing area, expands the imaging width, and solves the problem of aliasing in the imaging area under sampling in the spatial frequency domain. The brightness temperature image information of different frequency components can be derived from results of interferometric measurement of baselines with different lengths in the new array layout, which solves the problem of full-width imaging in one observation. The overall study is verified by numerical calculations.