Ultra-wideband low-profile antenna array structure

Abstract

The invention provides an ultra-wideband low-profile antenna array structure, comprising an antenna array layer, a dielectric support layer, an absorbing material layer and a metal ground layer whichare sequentially connected from top to bottom to form a stacked structure, wherein the antenna array element comprises two parts of the same structure, each part is a gradual structure from the feeding end to the element arm; for a single array composed of multiple array elements, the outer edge shape is a hexagonal structure, and the upper and lower adjacent array elements are in a triangular array; the edge elements of each row of the single array are half-imaginary elements connected to the ground; for each row of array elements, the gap width between adjacent array elements is less than orequal to three percent of the wavelength of the high-frequency end. Compared with the prior art, the invention is capable of covering higher octave bandwidth, and has better impedance matching performance and radiation pattern. At the same time, the array antenna has smaller aperture than the conventional antenna, and the profile height is lower than that of the conventional antenna. So that, ultra-wideband miniaturized low profile requirements for antenna array are satisfied.

Description

technical field [0001] The invention relates to an ultra-wideband low-profile antenna array structure and relates to the field of antenna design. Background technique [0002] The traditional phased array antenna technology is becoming more and more mature. At present, the basic idea is to use a single broadband antenna unit to form an array, and use the array structure to make the array reach the corresponding indicators in terms of impedance characteristics or radiation characteristics. However, this design idea has certain limitations in further expanding the working bandwidth of the antenna array, because the requirements for the electrical size of the ultra-wideband antenna unit make the cross-section of the antenna array too large, making it difficult to miniaturize and conform. At present, the slot antenna is widely used in broadband phased arrays as a better performance antenna element, but it still cannot solve the reasons of high profile and difficulty in conformal...

AI Technical Summary

Problems solved by technology

However, this design idea has certain limitations in further expanding the working bandwidth of the antenna array, because the requirements for the electrical size of the ultra-wideband antenna unit make the cross-section of the antenna array too large, and it is not easy to miniaturize and conform

At present, the slot line antenna is widely used in broadband phased array as a better performance antenna unit, but it still cannot solve the reasons of high profile and difficulty in conformal shape

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