Arrangement Method of Synthetic Aperture Radiometer Array Based on Recurrent Triangular Grid in Ring

Abstract

The invention discloses a method for arranging a ring-shaped synthetic aperture radiometer antenna array based on a regular triangular grid: firstly, performing regular triangular grid formation on the plane where the antenna array is to be placed to obtain a plurality of regular triangular grids; then, selecting any Any vertex in an equilateral triangular grid is the center O, and the radii r1 and r2 are obtained according to the number n of antenna elements to be placed and the radius r0 of the circle; then, with the center O as the center of the circle, r1 and r2 are respectively used as the radius to obtain Two concentric circles; then, set the position within the range between the two concentric circles and at the vertices of the regular triangle grid to be the candidate position of the antenna unit to be placed, and obtain n from the candidate position by optimizing the objective function position as the position to place the antenna unit; finally, the antenna unit is set at the position to form the required antenna array. The invention can acquire regular spatial frequency domain sampling, which is more conducive to reducing the computational complexity of the inversion algorithm and improving the quality of the inversion image.

Description

Technical field [0001] The invention belongs to the technical field of microwave remote sensing and detection, and more specifically relates to a ring-shaped synthetic aperture radiometer array arrangement method based on a regular triangular grid. Background technique [0002] Interferometric aperture synthesis technology has been widely used in the fields of radio astronomy and earth remote sensing. This technology uses sparse small-aperture antenna arrays and related receiving technologies to obtain "synthetic" apertures. Compared with real-aperture technology, this technology solves the problem of the size constraints of the microwave radiometer in the space of the carrier platform to a certain extent. This is in the spaceborne platform Especially obvious. The classic antenna array arrangements include Y-shaped, uniform ring-shaped and other forms. The Y-shaped array corresponds to regular hexagonal grid spatial frequency domain sampling, which is easy to perform hexagonal ...

AI Technical Summary

Problems solved by technology

[0003] In view of the fact that the existing circular array (Circular Array) is not easy to carry out the hexagonal fast inverse Fourier transform and the Y-shaped array has no conformal advantage, the present invention proposes a new antenna array arrangement method. On the one hand, it It can be conformal with the platform, and on the other hand, it can form regular spatial frequency domain sampling, which is conducive to reducing the computational complexity of the inversion algorithm and improving the quality of the inversion image

Images