Low-RCS metasurface antenna array based on coding idea and design method thereof

Abstract

The invention discloses a low-RCS metasurface antenna array based on a coding idea and a design method thereof. The antenna array comprises a first dynamic scattering metal patch layer, a first dielectric layer, a metal backboard layer, a second dielectric layer, a bottom metal feed network layer, a plurality of coaxial metal feed columns, and a plurality of switching diodes. The metal layers and the dielectric layers are sequentially and seamlessly laminated and pressed together; the plurality of coaxial metal feed columns respectively penetrate through the first dynamic scattering metal patch layer, the first dielectric layer, the metal backboard layer, the second dielectric layer and the bottom feed network layer from top to bottom; the metal backboard layer is provided with a plurality of corresponding holes which are used for being isolated from the metal feed columns. According to the invention, the scattering phase of the dynamic scattering metal layer is further changed by changing the on-off state of a switching diode, and the overall scattered field coherent offset of the antenna is realized to achieve the stealth effect while the radiation performance of the antenna is not affected.

Description

technical field [0001] The invention belongs to the technical field of microwave antennas, and in particular relates to a low-RCS metasurface antenna array based on coding ideas and a design method thereof. Background technique [0002] As an indispensable part of modern information warfare—the antenna plays an important role in the real-time communication of battlefield information. However, in practical applications, in order to ensure the normal operation of the wireless communication system, the antenna is often placed in a relatively exposed position to generate a relatively large radar cross section (Radar Cross Section, RCS), that is, strong scattering characteristics. Therefore, how to effectively reduce the RCS of the antenna has become a hot issue in the design of military low-observable radar systems. [0003] Metasurface is an artificial electromagnetic material with subwavelength structure. It has special electromagnetic properties that traditional materials do...

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