Low-profile two-dimensional wide-angle scanning circularly polarization phased-array antenna

Abstract

The invention discloses a low-profile two-dimensional wide-angle scanning circular polarization phased-array antenna, and aims to provide an antenna structure which is easy to integrate and has good wide-angle scanning gain characteristics and circular polarization characteristics. According to the technical scheme, each 3D structure antenna unit forms an array unit of the two-dimensional wide-angle scanning circular polarization phased-array antenna through metal columns which are arranged between an annular radiator and a circular polarization patch slotting radiator in a circumferential circular array mode; each 3D structure antenna unit is fixed on the two-dimensional layer surface of the upper dielectric plate through a feed column fixedly connected to the lower surface of the circularly polarized slotted patch radiator; the feed column penetrates through the lower dielectric plate, the four 3D structure antenna units are connected with the annular radiator upwards and are connected with the feed base disc downwards, the four adjacent 3D structure antenna units form a 2*2 rectangular arrangement subarray in a touch type feed and 90-degree sequential rotation arrangement mode,and the four feed base discs are delayed by 90 degrees clockwise in sequence for feeding, so that the optimal right-handed circular polarization performance is obtained.

Description

technical field [0001] The invention relates to a low-profile two-dimensional wide-angle scanning circularly polarized phased array antenna structure widely used in the fields of radar, satellite communication, navigation, space detection and the like, especially in miniaturization or integrated design. Background technique [0002] With the rapid development of electronics and communication technology, phased array antennas are widely used in mobile communication systems due to their high directional gain coverage. Compared with traditional mechanical scanning antennas, phased array antennas have the advantages of flexible beam direction, small size, and low mass, so they are more and more widely used in phased array radars and other aspects. Although the traditional phased array antenna has many advantages, the beam width of the phased array line unit is limited, which leads to an excessive decrease in the array gain in the direction of low elevation angle; the port input ...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the shortcomings of the limited scan angle of the existing circularly polarized planar array and the large three-dimensional volume of the wide-angle scan array, the present invention provides a simple structure, light weight and low profile, high engineering practicability, reliable performance, and good performance. An array antenna structure with wide-angle scanning gain characteristics and circular polarization characteristics to solve the problems of low large-angle scanning gain, poor circular polarization performance, and excessive antenna profile in the prior art

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