Ultra-sparse layout method for wide-angle scanning hybrid array without grating lobe

Abstract

A wide-angle scanning mixing array supersparsity layout method without grating lobes relates to an antenna. A mixing array supersparsity layout method of a secondary inhomogeneous interval subarray is employed, namely a simulation multi-beam forming network is employed in the subarray, and different phase shift magnitudes are configured for the array elements to allow the subarray wave beam to realize the wide-angle airspace scanning. A plurality of subarrays are subjected to layout at inhomogeneous intervals to form a total array, after each subarray is outputted, the analog-digital sampling is performed, and one single subarray only need one digital channel so as to greatly reduce the number of the channels. The genetic algorithm is employed to optimize the distances of the internal subarray and between the subarrays, the minimum distance is controllable, and the side lobes and the grating lobe level can be inhibited in the condition of the wide-angle scanning to obtain a mixing array sparse layout with the average distance and the minimum distance of the array elements being far larger than half wavelength. The subarrays of the mixing sparse array employ the same structure, and are easy for processing, assembling and batch production, low in cost and wide in application.

Description

technical field [0001] The invention relates to an antenna, in particular to a super-sparse layout method of a grating-lobe wide-angle scanning hybrid array in the fields of radar, communication and electronic countermeasures. Background technique [0002] Compared with traditional RF beamforming arrays, digital beamforming (DBF) arrays have unique advantages such as flexible beams, strong anti-interference ability, and multiple beams at the same time. However, the required digital channels are relatively expensive, which limits DBF to some extent. array applications. In particular, for an electrically large-sized DBF array with a high-gain narrow beam, according to the traditional half-wavelength interval layout method, the number of digital channels required is huge. For example, a 10m long DBF array working at 3GHz has up to 200 digital channels. Therefore, how to reduce the number of required digital channels has become a key issue for large DBF arrays. [0003] Docum...

AI Technical Summary

Problems solved by technology

Although the above-mentioned methods reduce the number of array elements required, more digital channels are still required for large arrays, resulting in high complexity and high cost of manufacturing the array.

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