Coding metasurface antenna array structure based on phase gradient and design method

Abstract

The invention discloses a coding metasurface antenna array structure based on phase gradient. The coding metasurface antenna array structure comprises a metal patch layer, a first intermediate dielectric layer, a metal floor layer, a second intermediate dielectric layer, a feed network layer, a third intermediate dielectric layer and a direct current bias network layer which are sequentially laminated together, the metal patch layer comprises a plurality of rectangular patch units, and the lower surfaces of the patch units are connected to the feed network layer in the vertical direction through first feed columns; two sides of the first feed column are respectively provided with a second feed column which is connected with the patch unit and the direct current bias network layer; the invention further provides a corresponding design method, so that the cross polarization scattering phase of the designed coding metasurface antenna array structure meets the phase difference of 180 degrees + / -37 degrees under the on-off state of the four diodes, the purpose of hiding the inside and outside of an antenna band can be achieved, and different dynamic scattering effects can be presented.

Description

technical field [0001] The invention relates to the technical field of microwave antenna design, and mainly relates to a phase gradient-based coding metasurface antenna array structure and design method. Background technique [0002] In modern electronic warfare, the stealth performance of combat platforms such as aircraft, rockets, and ships often directly affects their combat capability and survivability. Through various means, the detectable information characteristics of one's own targets can be changed, and the enemy's target can be changed to the greatest extent possible. The device cannot detect or even mistakenly identify other targets to achieve the purpose of "concealing the true and showing the false". [0003] At present, most of the stealth designs for antenna arrays use passive cancellation technology, or load a frequency-selective surface radome for filtering, or load a metasurface structure around the antenna / floor for wave absorption / phase cancellation... Su...

AI Technical Summary

Problems solved by technology

However, at present, for the stealth design of the phase gradient antenna array, the phase gradient metasurface is loaded around the antenna as an accessory, which not only needs to be designed separately, but also increases the size of the antenna.

Images