This article introduces a wideband pattern reconfigurable antenna made of seawater. A special funnel-shaped metal structure is used for feeding to increase the bandwidth of the antenna. The antenna-design refers the electronically steerable parasitic array radiator antenna principle, and arc-shaped water columns are introduced around the seawater monopole antenna to operate as parasitic passive oscillators. These parasitic elements turn the omnidirectional antenna into a directional antenna. The proposed antenna has more than one mode. When the number of parasitic elements is 2, 3, and 4, it respectively corresponds to three different working modes: dual-beam radiation, wide-angle radiation, and directional high-gain radiation. And in all these three modes, changing the position of the parasitic elements can achieve 360° beam-sweeping in the 1.66 ~ 2.78 GHz. A prototype is fabricated and verified, and the experimental results are in good agreement with the simulated results. The antenna is filled with seawater when in use, and the weight can be reduced by draining the seawater when not in use. There is great application potential in the field of maritime communications.

中文翻译：

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一种具有寄生水辐射阵列的宽带可重构天线

本文介绍了一种由海水制成的宽带方向图可重构天线。馈电采用特殊漏斗形金属结构，增加天线带宽。天线设计参考电子可控寄生阵列辐射器天线原理，在海水单极天线周围引入弧形水柱，作为寄生无源振荡器工作。这些寄生元件将全向天线变成了定向天线。建议的天线具有不止一种模式。当寄生元件数为2、3、4时，分别对应三种不同的工作模式：双光束辐射、广角辐射、定向高增益辐射。并且在这三种模式中，改变寄生元件的位置可以实现 1 中的 360° 光束扫描。66 ~ 2.78 GHz。制作并验证了样机，实验结果与模拟结果吻合较好。天线在使用时充满海水，不用时可以通过排干海水来减轻重量。在海上通信领域有很大的应用潜力。