A Dynamic Multi-Frequency and Multi-beam Spatial Arbitrary Scanning Reflectarray

Abstract

The invention discloses a dynamic multi-frequency multi-beam spatial arbitrary scanning reflection array comprising a feed source horn, a stacked multilayer reflective array, and a control excitation module loaded on the array. A reflective array unit can be constructed flexibly at a reconfigurable surface loaded at each layer of array to meet work requirements at different frequency bands in different space radiation directions, thereby realizing multi-band work and arbitrary-direction radiation of beams. On the basis of the multi-layer structure, multi-frequency work is realized and spatial beam directions in respective operating frequencies can be designed respectively to realize a frequency-division and beam-division effect. The reflective array units in the array can be regulated dynamically and dynamic scanning of reflected beams in any spatial direction can be realized.

Description

technical field [0001] The invention relates to the field of electronic communication, in particular to a dynamic multi-frequency multi-beam space arbitrary scanning reflection array. Background technique [0002] A flat reflectarray is an antenna form that combines a reflective parabola and an array antenna. The reflection phase is corrected by designing or controlling the structural parameters of each unit on the array, so that it can obtain an equiphase plane in a certain direction of the far field, and obtain a radiation beam in this direction. Compared with the traditional reflective parabola and array antenna, this type of reflectarray has many advantages: no complicated feeding or power dividing network, higher energy transmission efficiency and less loss; two-dimensional structure with low profile and small space occupation It is small, light in weight, easy to process and low in cost; it can be folded and unfolded, which is convenient for space applications; it has...

AI Technical Summary

Problems solved by technology

The planar reflective array has inherent disadvantages: the path difference from the feed source to each reflective unit on the front is a function of frequency, so as the frequency changes, the spatial phase difference that each reflective unit needs to compensate also changes.

The reflection unit is a fixed-size metal patch, and the frequency deviation exceeds the design, which will inevitably lead to problems such as gain drop and beam deviation, which makes the traditional planar reflector array have inherent narrow-band operating characteristics, and it is difficult to achieve broadband and multi-frequency operation.

In addition, traditional planar reflectarrays with a fixed structure can only change the beam radiation direction through mechanical rotation, which has slow response, sluggish response, and clumsy structure, and it is impossible to realize dynamic scanning of the beam.

Coupled with the dense metal structure on the array, the stealth performance of the array is greatly reduced

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