Stepping compensation low-cost phased array antenna architecture and design method thereof

Abstract

The invention discloses a stepping compensation low-cost phased array antenna architecture and a design method thereof, relates to the technical field of spaceborne radar antennas in the spaceflight field, and solves the problems of poor sub-array level phased array scanning capability, high scanning grating lobe and serious gain loss of a spaceborne radar antenna in the spaceflight field. The stepping compensation low-cost phased array antenna architecture comprises n antenna sub-arrays, n transceiving assemblies and a power division synthesis network; and each antenna subarray comprises a wave beam stepping shifter and m basic radiation units, each wave beam stepping shifter comprises m output ends, the input ends of the n wave beam stepping shifters are connected with the output ends ofthe n transceiving assemblies, the m output ends of the wave beam stepping shifters are connected with the input ends of the m basic radiation units respectively, and the input ends of the n transceiving assemblies are respectively connected with the corresponding output ends of the power division synthesis network. The scanning gain loss is greatly reduced, the scanning range can be expanded, the flexibility of a satellite-borne information system is improved, and the antenna architecture can be widely applied to a high-speed satellite communication system and a high-resolution radar imagingsystem.

Description

technical field [0001] The invention relates to the technical field of spaceborne radar antennas in the aerospace field, and specifically relates to a low-cost phased array antenna structure with step compensation and a design method thereof. Background technique [0002] With the development of information technology, the spaceborne information system will play an increasingly important role in the development of the future society. As a key component of the spaceborne information system, the performance of the antenna affects the signal-to-noise ratio and operating distance of the entire system. As well as data transmission capabilities, therefore, the development of high-performance space-borne antennas is particularly important and urgent. [0003] The active phased array antenna has the characteristics of flexible beam scanning, no inertia and fast speed. It can achieve low sidelobes through amplitude and phase control, adaptive zeroing to suppress various interferences...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a low-cost phased array antenna architecture with step compensation to solve the problem of sub-array-level phased array scanning of spaceborne radar antennas in the aerospace field. Poor capability, high scanning grating lobes, serious gain loss

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