Dual-Frequency Metasurface Antenna for Remote Sensing

This paper presents an innovative approach to designing dual-frequency Metasurface (MTS) antennas. These antennas cater to the growing demand for multifrequency ca- pabilities in applications like Earth science, satellite communi- cations, and remote sensing. Traditional multifrequency antenna designs have limitations, often requiring external feeds. The paper outlines the foundational principles of single-layer, single frequency MTS antenna design and expands upon them to introduce a dual-band, dual-layered antenna configuration. The proposed design leverages Foster’s reactance theorem to enable independent operation of two patterned metallic sheet at two widely separated frequencies with coplanar excitation. Simulation results demonstrate the antenna’s performance, not only in broadside operation but also at various pointing angles. This approach offers a promising solution for compact multifrequency antennas in space-constrained applications, addressing the needs of modern communication systems.

本文提出了一种设计双频超表面（Metasurface, MTS）天线的创新方法。这些天线可满足地球科学、卫星通信和遥感等应用领域对多频能力日益增长的需求。传统多频天线设计存在局限性，通常需要外部馈源。论文概述了单层单频MTS天线设计的基本原理，并在此基础上拓展，提出了一种双频段双层天线结构。该设计利用福斯特电抗定理，实现了两片图案化金属片在两个相距甚远的频率下通过共面激励独立工作。仿真结果表明，该天线的性能不仅体现在宽边工作模式下，还体现在多种指向角度下。这种方法为空间受限应用中的紧凑型多频天线提供了一种极具前景的解决方案，可满足现代通信系统的需求。