Broadband low-minor-lobe analog multi-beam array reconnaissance system

Abstract

A broadband low-minor-lobe analog multi-beam array reconnaissance system comprises a broadband active antenna array, a Rotman lens network, a beam selection switch, a broadband digital receiver, a signal processing unit. The broadband active antenna array is connected with an analog multi-beam network. The Rotman lens network is configured to form multiple beams simultaneously in a large instantaneous bandwidth. Further, by assigning corresponding amplitude and phase weights to respective amplitude-phase weighting modules of the antenna array, the beam selection switch performs radio frequencyselection in multiple beams according to a control command and sends a selected signal to the broadband digital receiver. The digital receiver processes the data from multiple beams and frequency bands in parallel, and performs parameter measurement on the data to form a radar pulse descriptor and sends the radar pulse descriptor to the signal processing unit. The signal processing unit processesthe signal to form a radar descriptor. The system achieves high sensitivity, wide frequency-domain coverage, wide airspace coverage, flexible beam scheduling and good complex electromagnetic environment adaptability.

Description

technical field [0001] The invention relates to radar countermeasure reconnaissance technology, in particular to a broadband low-sidelobe analog multi-beam array reconnaissance system. Background technique [0002] With the development of radar technology, new requirements are put forward for radar countermeasure and reconnaissance equipment. In order to cope with threats such as low sidelobe, large bandwidth, and multiple targets of the new system radar, the radar countermeasure equipment of the new system must also have high system sensitivity, wide frequency domain coverage, and wide airspace coverage capabilities. Since the array reconnaissance system can form multiple high-gain beams at multiple angles at the same time, it can have high system sensitivity and wide airspace coverage. Therefore, in recent years, more and more attention has been paid to the development of new system electronic countermeasure reconnaissance equipment. [0003] The traditional array system ...

AI Technical Summary

Problems solved by technology

[0003] The traditional array system based on the phase shifter system can only work in a relatively narrow signal bandwidth due to the limitation of the transit time of the array aperture. The digital array system is limited by digital acquisition devices and digital processing capabilities, and the working bandwidth is the same. Restricted, although the working bandwidth of the array system using Rotman lens technology is improved, but the side lobe level is high, and the adaptability to complex electromagnetic environments is poor

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