Electrically Small UAV Antenna Design Using Characteristic Modes
Electrically Small UAV Antenna Design Using Characteristic Modes
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DOI：
10.1109/tap.2013.2289999
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发表时间：
2014-02-01
影响因子：
5.7
通讯作者：
Wang, Chao-Fu
中科院分区：
文献类型：
--
作者：
Chen, Yikai;Wang, Chao-Fu
提出了一种基于特征模态理论的电动小型无人机天线设计新思路。在了解无人机机体特征模式的基础上，采用多目标进化算法对无人机机体上的电流进行综合，以获得所需的功率模式。然后设计紧凑和低轮廓的馈电结构来激发合成电流。馈电结构被称为探针，因为它们用于激发无人机机体上的电流，不能作为独立的天线工作。由这些探头激发的无人机机体作为辐射孔径。它的可重构辐射图是通过给每个探针适当的大小和相位来获得的。该方法充分利用了无人机机体的孔径。消除了与低频大天线相关的实际问题。在这样的平台上放置探针的知识变得更加明确。仿真和实测结果验证了设计理念。
This paper presents a novel concept of antenna design for an electrically small unmanned aerial vehicle (UAV) using the theory of characteristic modes. With the knowledge of the characteristic modes of the UAV body, a multi-objective evolutionary algorithmis implemented to synthesize currents on the UAV body for achieving desired power patterns. Compact and low-profile feed structures are then designed to excite the synthesized currents. The feed structures are termed as probes, as they are used to excite the currents on the UAV body and cannot work as standalone antennas. The UAV body excited by these probes serves as the radiating aperture. Its reconfigurable radiation patterns are obtained by feeding each probe with proper magnitude and phase. In this method, the aperture of the UAV body is fully utilized. Practical issues associated with large antennas at low frequency band are eliminated. Knowledge for probe placement on such platform becomes more explicit. Simulated and measured results are presented to verify the design concept.