K/Ka dual-band common-aperture antenna array

Abstract

The invention discloses a K/Ka dual-band common-aperture antenna array, aiming to provide an antenna array surface capable of reducing the antenna profile, covering K and Ka bands and sharing a dual-band aperture. The invention is implemented by the following technical schemes: K-band patches are distributed on a dielectric substrate in the form of a uniform rectangular array, Ka-band patches areinterspersed in the center of the interval of adjacent K-band patches in an interpolation manner, the K-band patches are in orthogonal connection with a bonding pad located on the bottom surface of the dielectric substrate through a feeder pillar that penetrates through the dielectric substrate, the bonding pad is connected with a coaxial feeder, and the coaxial feeder penetrates through a metal base plate to connect with the bonding pad and feeds in a touch-type connection manner, wherein the K-band patches are combined with the metal base plate through the feeder pillar to form a K-band antenna array surface, the feeder pillar is connected with the coaxial feeder through the bonding pad to form a K-band channel; and the Ka-band patches are combined with the metal base plate through the feeder pillar to form a Ka-band antenna array surface, and the feeder pillar and the bonding pad conduct the coaxial feeder to form a Ka-band channel.

Description

technical field [0001] The invention relates to a K / Ka dual-band common-aperture antenna array, in particular, it is suitable for constructing a K / Ka common-aperture two-dimensional large-angle scanning phased array antenna array. Background technique [0002] In the phased array antenna system with limited size and weight, in order to reduce the volume and RCS of the system, it is urgent to reduce the aperture of the antenna as much as possible without affecting the performance of the antenna. If antennas of different frequency bands are integrated into a unified aperture, the antenna aperture can be greatly reduced. At present, in the common-aperture antenna arrays with K / Ka or similar frequency ratios at home and abroad, the single-layer array cannot fully meet the grating lobe conditions of the two-dimensional large-angle scanning of the phased array antenna. However, when stacked and three-dimensional array subunits are used, although the grating lobe conditions can be...

AI Technical Summary

Problems solved by technology

At present, in the common-aperture antenna arrays with K/Ka or similar frequency ratios at home and abroad, the single-layer array cannot fully meet the grating lobe conditions of the two-dimensional large-angle scanning of the phased array antenna.

However, when the stacked and three-dimensional array subunits are used, although the grating lobe conditions can be met, the section height is increased, which is extremely unfavorable for low-profile conformal applications, and the RCS is high, which cannot meet the requirements of low RCS.

[0003] Chinese patent application CN201310538063.8 discloses a dual-frequency dual-circular polarization common-aperture antenna array for two-dimensional phased array scanning, which adopts square radiators in the same layer, but the metal radiators in the Ku frequency band in the central area If the spacing is greater than 0.5 times

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