Oblique 45-degree polarized radiation broadband tile type phased array antenna

Abstract

The invention discloses an oblique 45-degree polarized radiation broadband tile type phased array antenna. The antenna sequentially, from top to bottom, comprises, an upper dielectric substrate which plays a role in wide-angle matching, a radiation unit layerin which the upper surface and the lower surface are respectively printed with a pair of orthogonal butterfly-shaped dipoles and circular patches, a middle dielectric substrate which plays a role in supporting an antenna structure, a lower feed dielectric plate which is printed with a strip line power divider, and the metal floor which is located at the lowermost layer of the antenna structure. The feed end adopts a fuzz button form, an inner core of the fuzz button is connected with a one-to-two strip line power divider, and two output ports of the power divider have equal amplitude and in-phase signals and are connected with a pair of orthogonal butterfly-shaped dipole metal patches through metallized via holes to form oblique 45-degree polarized radiation. The antenna has the characteristic of oblique 45-degree polarized radiation in a wide frequency band range.

Description

technical field [0001] The invention belongs to microwave antenna technology, in particular to a tile-type phased array antenna with oblique 45° polarized radiation broadband. Background technique [0002] In order to achieve good compatibility with multi-functional airborne, missile-borne, space-borne and other limited platforms, the new-generation phased array antenna system usually adopts a tile structure. Internet and other new requirements. In addition, in order to improve the ability to capture signals in different polarization directions, phased array antennas with oblique 45° polarization radiation are usually used in engineering applications. Compared with dual-polarized antenna arrays, the cost of phased array systems can be effectively reduced. Therefore, the broadband tile array antenna with oblique 45° polarization radiation is the future development direction of phased array. [0003] At present, tile-type phased array antennas usually use planar printed ante...

AI Technical Summary

Problems solved by technology

In 2018, Bai Yanying proposed a Vivaldi antenna based on the obliquely polarized radiation at an angle of 45° between the rotation of the antenna unit and the horizontal plane in the paper "A Design of a Small-Scale Ultra-Wideband Phased Array Antenna". ° range to achieve scanning, but this type of antenna is not suitable for tile structures

This type of antenna has become a research hotspot in recent years because of its planar stacking characteristics, which can be applied to broadband tile-type phased array antenna systems, but it does not have the ability to slant 45° polarized radiation

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