Fuselage conformal phased array antenna

Abstract

The invention provides a fuselage conformal phased array antenna, which comprises an antenna substrate and a plurality of antenna array units arranged on the antenna substrate, wherein the antenna substrate comprises a metallized layer and a dielectric layer; the antenna array unit comprises a feeding point, a radiation slot, a waveguide side wall metallized through hole and an amplitude-phase allocation metallized through hole; the waveguide side wall metallized through hole is arranged around the radiation slot; the amplitude-phase allocation metallized through hole is located between the waveguide side wall metallized through hole and the radiation slot and penetrates through the upper metallized layer and the lower metallized layer; and the waveguide side wall metallized through hole and the amplitude-phase allocation metallized through hole are used for adjusting electrical parameters of the radiation slot. According to the fuselage conformal phased array antenna provided by the invention, as the positions of the waveguide side wall metallized through holes and the amplitude-phase allocation metallized through holes are adjusted, electrical parameters of each radiation slot can be adjusted, antenna aperture amplitude adjustment and phase control are realized, amplitude and phase errors of the fuselage conformal phased-array antenna caused by fuselage bending influence aremade up, and low sidelobe performance of the antenna is realized.

Description

technical field [0001] The invention relates to the technical field of phased array antennas, in particular to a fuselage conformal phased array antenna. Background technique [0002] In order to improve the antenna gain of airborne radar, communication and other equipment, a larger antenna aperture is required. However, the installation of large-aperture antennas on the aircraft platform is contradictory, and the head space is limited, and the large-aperture antennas on the back of the aircraft affect the aerodynamic performance of the aircraft. Therefore, a better solution is to fuse the antenna and the fuselage together, that is, install the antenna conformally on the surface of the fuselage to form a non-planar conformal antenna. This technology does not destroy the shape, structure and aerodynamic characteristics of the aircraft, has little impact on the flight of the aircraft itself, and has much less impact on the electromagnetic characteristics of the aircraft itsel...

AI Technical Summary

Problems solved by technology

Due to the structural limitation of the fuselage itself, the curvature of the conformal antenna is different at different positions of the fuselage. The existing conformal antenna is affected by the bending of the fuselage, and its radiation amplitude and phase produce errors, resulting in the conformal antenna beam in the elevation plane. Pointing deviation and sidelobe level deterioration

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