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To address the challenges of the complex design process and long optimization time for antenna radar cross section (RCS) reduction, this paper adopts the "first scattering then radiation" low-RCS antenna design concept and implements dual-polarized RCS reduction of the antenna based on the hybrid mechanism. A dual-polarized low-scattering metasurface antenna is proposed, which overcomes the drawbacks of traditional low-RCS antenna design methods. Firstly, a dual-polarized low-RCS metasurface antenna is designed based on the amplitude and phase control characteristics of the metasurface, achieving independent control of the reflected beams for different polarized incident waves. Secondly, drawing on the radiation structure of traditional patch antennas. A local adjustment is made to the metasurface based on the low RCS metasurface. The antenna radiation is achieved through coaxial feed excitation. Finally, combined with the current distribution adjustment of the radiation structure, the antenna radiation performance is rapidly optimized.
Through simulation and experimental verification, the proposed antenna not only has good radiation performance but also can achieve dual-polarized RCS reduction within and outside the band. Compared with the traditional low-RCS antenna design methods, the "first scattering then radiation" reverse design concept adopted in this paper and the new method of implementing dual-polarized RCS reduction of the antenna based on the hybrid mechanism effectively resolve the contradiction between radiation and low scattering caused by the compact structure of the metasurface antenna, greatly simplify the design process of the low-scattering metasurface antenna. The antenna uses a single-layer dielectric design to achieve RCS reduction, featuring a simple structure, compactness, and low profile.-
Keywords:
- electromagnetic metasurface /
- antenna /
- amplitude-phase modulation /
- low radar cross section
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