Broadband low-scattering microstrip array antenna based on coding metasurface

Abstract

The invention provides a broadband low-scattering microstrip array antenna based on a coding metasurface. The array antenna comprises a square upper-layer dielectric plate, a middle-layer dielectric plate and a lower-layer dielectric plate which are arranged from top to bottom and are not in contact with one another; m*M rectangular microstrip radiation patches which are periodically arranged areprinted at the central position of the upper surface of the upper dielectric plate; a coding metasurface is printed on the upper surface of the middle dielectric plate, a single-input M2-output microstrip feed network is printed on the upper surface of the lower dielectric plate, a metal radiation floor is printed on the lower surface of the lower dielectric plate, and the microstrip feed networkis connected with the rectangular microstrip radiation patch through a metal probe penetrating through the middle dielectric plate and the upper dielectric plate. By highly integrating the coding metasurface and the microstrip array antenna, remarkable RCS reduction is achieved while the radiation characteristic is guaranteed, and the technical problems that in the prior art, the RCS reduction bandwidth of an antenna is narrow, and the radiation performance and the scattering performance of the antenna are difficult to consider at the same time are solved.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to a microstrip array antenna, in particular to a wideband low-scattering microstrip array antenna based on a coded metasurface. Background technique [0002] In today's communication field, the signal transmitting and receiving system is one of the most important components of the entire communication platform, the antenna is the core part of the system, and the radiation characteristics are the main indicators to measure the quality of the antenna. The key to improving the scattering characteristics is how to reduce the radar cross section, and the radar cross section is the most basic parameter in the scattering characteristics. It refers to a measure of the return power of a target in a given direction under the illumination of a plane wave. [0003] As a special scatterer, due to the working characteristics of the antenna system itself, the key point is to realize its low radar ...

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Problems solved by technology

[0007] The purpose of the present invention is to address the deficiencies in the above-mentioned prior art, and propose a wideband low-scattering microstrip array antenna based on a coded metasurface, in order to solve the narrow bandwidth of the antenna RCS reduction in the prior art and the difficulty of taking into account both antenna radiation and Technical Issues with Scattering Performance

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