Dual‐band, low‐profile, vertically polarized annular ring slot antenna embedded in a small metallic UAV

作者：Ling Sun, Baohua Sun, Jiangpeng Yuan, Wending Tang · 发表于：Microwave and Optical Technology Letters · 年份：2015 · DOI：10.1002/mop.29554 · 被引用次数：8 · 研究领域：Antenna Design and Analysis、Antenna Design and Optimization、Advanced Antenna and Metasurface Technologies

ABSTRACT A dual‐band, low‐profile, vertically‐polarized annular ring slot antenna is presented. The antenna consists of an annular ring slot structure and a ring‐shaped structure. The ring‐shaped structure is attached on the back of the annular ring slot structure using two sets of conductive vias to avoid increasing the size of the proposed antenna. Dual‐band characteristic is realized by adjusting the radius of the annular ring slot structure and the ring‐shaped structure. Analysis of the dual‐band characteristic of the proposed antenna is discussed. The proposed antenna is vertically polarized and provides a monopole‐like radiation pattern on both the frequency bands. The ground size of the proposed antenna is the same size as the antenna radius. The ground plane is relatively small comparing with most of the other vertically polarized patch antennas. The edge of the proposed antenna is shorted by a set of conductive vias. The proposed antenna is insensitive to the surrounding environment and thus can be embedded in a metallic unmanned aerial vehicles (UAV). A prototype with a height of 3.048 mm (0.03λ) and radius of 55 mm (0.45λ) is designed, fabricated, and measured. The proposed antenna works at 2.38 and 2.58 GHz. In addition, the proposed antenna embedded in a metallic UAV is simulated. The results show that the metallic UAV has small effect on the performance of the antenna. The proposed antenna is suitable for the operations of being controlled by a ground control st...