Broadband active multi-beam antenna system and correction method thereof

Abstract

The invention relates to the field of broadband array antennas, in particular to a broadband active multi-beam antenna system, which comprises a broadband active antenna array and a multi-beam network, wherein the broadband active antenna array comprises at least two column line sources and multifunctional radio-frequency front ends and a control unit; the column line sources receive multiple paths of radio-frequency signals and carry out pitching direction synthesis; the multifunctional radio-frequency front ends carry out low-noise amplifying, filtering, amplitude weighting and phase shift processing on the radio-frequency signals output by the column line sources; the control unit receives a control instruction input from the outside and adjusts attenuation and phase shift code values in the multifunctional radio-frequency front ends; and the multi-beam network synthesizes the radio-frequency signals output by the multifunctional radio-frequency front ends on the basis of lens network implementation and simultaneously outputs multiple paths of beams in an azimuth direction. A near field diameter inversion correction method is adopted by the broadband active multi-beam antenna system. Compared with a broadband multi-beam system formed by digital beams, the broadband active multi-beam antenna system has the advantages that the equipment quantity is greatly reduced, the weight, the cost and the power consumption are greatly reduced and the broadband active multi-beam antenna system is easily applied to engineering.

Description

technical field [0001] The patent of the present invention relates to the field of broadband array antennas, especially the broadband active antenna system in the electronic surveillance system, specifically the broadband active multi-beam antenna system. Background technique [0002] In order to adapt to the detection and reception of various electronic signals under complex electromagnetic environment conditions, an array antenna system that can meet the technical requirements of high gain, large instantaneous bandwidth, and wide airspace coverage is urgently needed. The broadband active multi-beam antenna system can form multiple receiving beams at the same time, realize large-angle scanning through rapid beam scheduling, and integrate broadband active circuits inside the array antenna, which can realize high-gain detection under large bandwidth conditions. Therefore, broadband active multi-beam antenna systems are widely used in electronic surveillance systems. [0003]...

AI Technical Summary

Problems solved by technology

The three methods have their own advantages and disadvantages. The error and distortion introduced by analog beamforming are large, but the performance is acceptable; digital beamforming has high flexibility, but there are problems such as timing, jitter and power consumption; optical beamforming can achieve greater Bandwidth, but less dynamic range and less stability

[0005] In the process of realizing the present invention, the inventor found that the problem of the broadband multi-beam system using digital beamforming technology is: when the instantaneous bandwidth is above 1 GHz, limited by the level of components, the amount of system equipment increases significantly, and the weight, cost and power consumption also decrease. The sharp increase, coupled with the timing problem of the system, greatly reduces the feasibility of the project

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