Substrate metal combined Vivaldi phased array antenna

Abstract

The invention relates to a substrate metal combined Vivaldi phased array antenna. The antenna sequentially comprises an upper-layer metal sheet antenna, an upper-layer substrate, a lower-layer substrate and a lower-layer metal sheet antenna from top to bottom. A Vivaldi substrate antenna is formed by crimping the upper-layer substrate and the lower-layer substrate, and comprises a micro-strip feeder line printed on the upper surface of the lower-layer substrate, a micro-strip fan-shaped stub line at the tail end of the micro-strip feeder line, and printing matching grooves and printing taperedslot lines which are printed on the lower surface of the lower-layer substrate and the upper surface of the upper-layer substrate; the upper-layer metal sheet antenna and the lower-layer metal sheetantenna are provided with metal matching grooves and metal tapered slot lines; the structural shapes of the metal matching grooves and the metal tapered slot lines are the same as those of the printing matching grooves and the printing tapered slot lines of the Vivaldi substrate antenna; the upper-layer metal sheet antenna is crimped to the upper surface of the upper-layer substrate; and the lower-layer metal sheet antenna is crimped to the lower surface of the lower-layer substrate. According to the invention, the unit directional diagram in the array is improved, the scanning airspace of thephased array antenna is expanded, the mechanical structure strength of the antenna substrate is improved, and the antenna deformation is reduced.

Description

technical field [0001] The invention belongs to the technical field of radar, and in particular relates to a novel substrate metal combination Vivaldi phased array antenna. Background technique [0002] The phased array antenna has the characteristics of quick response, sensitivity and accuracy, and can detect, identify and track multiple targets at the same time. It is a very advanced multi-functional integrated antenna. It can be used in almost all military radar systems. In addition, it also has a wide range of uses in civilian applications in the fields of air traffic control and weather forecasting. The phased array antenna is developed from the large line of the array, which is a directional antenna composed of many identical low-gain radiating elements arranged in an array according to certain requirements. Commonly used phased array antenna elements include microstrip patches, dipoles, waveguides, and Vivaldi antennas, among which Vivaldi antennas have been widely u...

AI Technical Summary

Problems solved by technology

In the optimization design process, the commonly used methods to improve the array unit pattern include adding isolation boards, adding absorbing materials, optimizing the antenna structure and the combination of several methods, etc., but sometimes these methods often cannot achieve better results

[0004] In addition, in practical applications, the deformation of the antenna substrate is often one of the important reasons for the deterioration of the antenna pattern

Using a thicker substrate can effectively reduce the deformation of the substrate, but due to the influence of surface waves, thick substrates are often not suitable for high-frequency applications

Another way to enhance the strength of the substrate is to add metal support bars between the antennas, but this method increases the difficulty of processing and design on the one hand, and on the other hand often has a greater impact on the performance of the antenna

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