Large-spacing array antenna based on subarray-level mixed arrangement and design method

Abstract

The invention discloses a large-spacing array antenna based on subarray-level mixed arrangement and a design method, and belongs to the technical field of antennae, an antenna array surface is formed by arranging regular modularized same subarrays according to a mixed arrangement rule, a rectangular coordinate system is established by taking a geometric center, and the whole array surface is in axial symmetry and central symmetry. The mixed arraying rule comprises two arraying modes of ring grating arraying and rectangular arraying, the position of one half radius is taken as a boundary, the peripheral sub-arrays larger than one half radius form the ring grating arraying, and the inner sub-arrays smaller than one half radius form the rectangular arraying. According to the invention, a relatively low side lobe of a large-spacing array can be ensured, and a relatively good grating lobe suppression effect can be realized; the same sub-array based on modularization can greatly simplify the design difficulty of the array, and the hybrid array arrangement mode can reduce the implementation difficulty of the array structure.

Description

technical field [0001] The invention relates to the technical field of antennas, and more particularly, to a large-spacing array antenna and a design method based on a sub-array-level hybrid array. Background technique [0002] The phased array antenna can quickly scan the beam by independently controlling the amplitude and phase of the radiation unit, and has been well used in radar, communication, measurement and control and other fields. In order to ensure better radiation performance, the element spacing of the phased array antenna is often small, close to half wavelength, and at the same time to achieve higher gain, the aperture of the phased array antenna needs to be proportionally enlarged, which will inevitably lead to the geometrical number of antenna elements. The multiple growth leads to higher and higher system costs, and more and more difficulty in heat dissipation and structural design. The solution is to reduce the number of cell channels by increasing the ar...

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Problems solved by technology

However, this method also relies heavily on algorithms and computing resources, and when this method is applied to the array design with a cell spacing greater than 2 wavelengths, the middle sub-array spacing is large, and the array presents a dense layout with sparse middle and surrounding areas, resulting in The sidelobe level deteriorates dramatically, especially the first sidelobe level

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