Ku/Ka dual-frequency dual-polarization phased-array antenna radiation array

Abstract

The invention discloses a Ku / Ka dual-frequency dual-polarization phased-array antenna radiation array, which comprises a plurality of basic units and a plurality of Ka antenna units. A Ku antenna unit is arranged in each basic unit; the Ku antenna units are dual-line polarized antennas and are arranged in a periodic array mode; the Ka antenna units are single-line polarized antennas and are arranged in a sparse array mode. And the Ka antenna units are arranged at the junctions of the adjacent basic units, and / or the Ka antenna units are arranged at the edges of the outer sides of the antenna radiation arrays. According to the invention, the radiation array of the phased-array antenna is a combination of the Ku periodic array and the Ka sparse array, the radiativity of the Ku frequency band and the Ka frequency band does not influence each other, and meanwhile, after the Ka antenna units are sparse, the sidelobe characteristic is good.

Description

technical field [0001] The invention relates to the technical field of phased array antennas, in particular to a Ku / Ka dual-frequency dual-polarization phased array antenna radiation array. Background technique [0002] The millimeter-wave phased array antenna has the characteristics of narrow beam, high gain, and fast beam scanning, which makes it more and more widely used in the field of millimeter-wave radar. However, with the development of radar technology, especially the demand for radar anti-jamming and other functions is increasing It is highlighted that new requirements are also put forward for antenna technology, resulting in dual-frequency composite technology and dual-polarization technology. [0003] The Ku and Ka frequency bands are frequently used in millimeter wave applications. It is a technology that has only been proposed in recent years to combine the two frequency bands with a common aperture to meet the design. However, it has not been reported to reali...

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Problems solved by technology

[0004] (1) The frequency of Ka is about twice the frequency of Ku. According to the antenna scanning principle, if the array antennas of these two frequency bands are combined, four Ka antenna array units need to be arranged within the space used by one Ku antenna array unit. In addition, the Ku antenna needs to realize the dual-polarization function, the feeding structure itself is relatively complicated, and the space occupied will be larger. Such an array cannot be realized at all;

[0005] (2) The Ku dual-polarized antenna occupies a large space, which increases the complexity of the array arrangement of the Ka antenna array unit;

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