Periodically arranged sparse array antenna and arrangement method

Abstract

The invention relates to a periodically arranged sparse array antenna and an arrangement method thereof. The array antenna includes S antenna periodic structures, and each antenna periodic structure includes N1 transmitting antennas and N2 receiving antennas. The N1 transmitting antennas are arranged in a first straight line, the N2 receiving antennas are arranged in a second straight line, the first straight line is parallel to the second straight line, and the first straight line is located above or below the second straight line. The S antenna periodic structures are sequentially arranged into an array antenna, the array antenna comprises M equivalent phase centers, and the M equivalent phase centers are arranged in an equidistant straight line, wherein a midpoint between any one of thereceiving antennas and any one of the transmitting antennas in the array antenna is an equivalent phase center, and 1-S(N1+N2) / M is larger than 0. The use of the periodic structures facilitates the formation of reusable standard modules, the improvement of product consistency is facilitated, maintenance parts are reduced, the maintainability is improved, and the full life cost of a product is reduced.

Description

technical field [0001] The invention relates to the field of array antennas, in particular to a periodically arranged sparse array antenna and an arrangement method. Background technique [0002] The current array antenna layout is mainly in the following two forms: [0003] The first antenna layout method, such as figure 1 As shown, the transmitting antenna and the receiving antenna are uniformly arranged, and when the equivalent phase center is d, the distance between the transmitting antenna and the receiving antenna is 2d. The array composed of the first antenna layout has a spatial periodic structure every 2 antennas, and 2 phase centers are added for every 2 antennas, the sparse efficiency of the array antenna is (1-2 / 2)=0, and the array antenna has no sparse effect . [0004] The second antenna layout method, such as figure 2 As shown, when the distance between the equivalent phase centers is d, the distances between the transmitting antennas are 2d and 4d respec...

AI Technical Summary

Problems solved by technology

Under the same technical performance conditions, the number of antennas required is large, the number of circuit units is large, and the production cost is high

The second antenna layout method is an aperiodic structure, and the antenna spacing does not use a periodic structure, which is not convenient to use multiple identical modules to form a large-scale sparse array

[0006] In summary, the existing array antenna layout has no periodic structure, and it is not convenient to use multiple identical modules to form a large-scale sparse array; there is no sparse effect, and the number of antennas required under the same technical performance conditions is large, and the circuit Defects such as large number of units and high production costs

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