Four-element adaptive anti-interference array antenna based on electromagnetic soft surface

Abstract

The invention relates to a four-element adaptive anti-interference array antenna based on an electromagnetic soft surface. The antenna comprises a base and a first receiving antenna, a second receiving antenna, a third receiving antenna and a fourth receiving antenna. The upper surface of the base is divided into four quadrants, and each quadrant is provided with an antenna installation groove forrespectively installing the first receiving antenna, the second receiving antenna, the third receiving antenna and the fourth receiving antenna.The radiation surfaces of the first receiving antenna,the second receiving antenna, the third receiving antenna and the fourth receiving antenna are not higher than the upper surface of the base. At least two concentric annular electromagnetic soft surface grooves are arranged around each antenna installation groove.

Description

technical field [0001] The invention relates to a four-element self-adaptive anti-jamming array antenna based on an electromagnetic soft surface, and belongs to the technical field of antenna design. Background technique [0002] In order to reduce the mutual coupling between array elements, the distance between the centers of the Beidou navigation anti-jamming array antenna units is generally between 120mm-125mm, and in order to maintain the radiation characteristics of the unit antennas, the minimum diameter of the unit antennas is generally between 50mm-60mm. Therefore, the opening diameter of the four-element anti-jamming array antenna window is between 300mm and 325mm. [0003] Further reducing the distance between unit antennas will cause strong mutual coupling, resulting in smaller nulls in the array pattern and reducing the anti-interference performance of the system; at the same time, it will also cause distortion of the unit antenna pattern and affect the satellite...

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Problems solved by technology

[0004] The technical problem solved by the present invention is: Aiming at the problem that the size of the traditional Beidou navigation four-array element anti-jamming array antenna is too large, a four-array element adaptive anti-jamming array antenna based on electromagnetic soft surface is proposed. Under the premise of the ability, the spacing between the array elements is reduced, the miniaturization design of the anti-jamming array antenna is realized, and the opening size of the antenna window on the pop-up is reduced

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