Phased-array antenna and design and expansion method thereof

Abstract

The invention discloses a phased-array antenna and a design and expansion method thereof, and belongs to the technical field of antennas. The antenna comprises sub-array modules which are periodicallyarranged, wherein each sub-array module comprises a plurality of antenna units, a transceiving module and a beam synthesis network, the plurality of antenna units are arranged at uniform distance, the distance among the antenna units is larger than a signal wavelength, the antenna units are divided to various types according to a polarization position of a phase center, and the phase centers of different types of antenna units are arranged at different polarization positions. The regular array framework has relatively high actinal surface utilization efficiency, relatively low array element numbers and cost and is suitable for engineering assembly and mass production, and the expansion of a large-size array performance parameter is facilitated.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a phased array antenna and its design and expansion method. Background technique [0002] Phased array antennas have flexible beam, arbitrary pointing and multi-beam capabilities, and are widely used in the fields of radar, communication and electronic warfare. However, the most practical problem faced by phased array antennas is: the trade-off between good performance and complexity and cost. [0003] In recent decades, there have been unconventional array designs that reduce the number of array elements, such as sparse arrays and sparse arrays, which can meet the design requirements of low sidelobes and reduce the cost of the array. However, the early sparse arrays and sparse arrays focused on the array design at the unit level. The array elements are arranged irregularly, which is not conducive to the modularization of engineering applications and destroys the continuity of ...

AI Technical Summary

Problems solved by technology

However, the most practical problem faced by phased array antennas is: the trade-off between good performance and complexity and cost

[0005] 1. The problem of low array surface efficiency still exists;

[0006] 2. No matter what array technology is used, the position of the antenna unit or sub-array needs to be moved, which brings inevitable complexity to the array structure and installation;

[0007] 3. After the design of the array antenna is completed, due to the limitation of the unit spacing, the array structure and performance parameters are basically fixed, and it is difficult to expand

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