中圖分類號：TN82 文獻(xiàn)標(biāo)志碼：A DOI: 中文引用格式： 郭德嘉，孫慧峰. 基于Vivaldi的超寬帶低剖面天線設(shè)計[J]. 電子技術(shù)應(yīng)用,，2024,，50(6)：52-56. 英文引用格式： Guo Dejia，Sun Huifeng. Design of ultra-wideband low-profile antenna based on Vivaldi[J]. Application of Electronic Technique,，2024,，50(6)：52-56.
Design of ultra-wideband low-profile antenna based on Vivaldi
Guo Dejia1，2，Sun Huifeng1,，2
1.Aerospace Information Research Institute,， Chinese Academy of Sciences；2.School of Electronic,， Electrical and Communication Engineering,， University of Chinese Academy of Sciences
Abstract： In response to the demand for miniaturized ultra-wideband radar systems, a novel ultra-wideband low-profile antenna array is designed with close coupling between antenna elements achieved through a cross-coupling structure. The proposed array antenna unit enhances the traditional Vivaldi antenna structure by introducing a pair of arc-shaped slots with circular cavities, giving it a dipole-like radiation pattern at the top of the Vivaldi antenna. The cross-coupling structure is employed to achieve tight coupling between the antenna elements, significantly reducing the overall profile height of the antenna. Additionally, a dielectric matching layer is introduced on top of the antenna unit to further improve the matching performance. Simulation results demonstrate that the designed array antenna exhibits a standing wave ratio of less than 2 across the 2.6 GHz to 15 GHz frequency range. The maximum gain of the 12×12 antenna array exceeds 20 dB, while the profile height of the array antenna unit is merely 15 mm (0.125 times the low-frequency wavelength). Hence, this antenna design not only meets the requirements of ultra-wideband performance but also greatly reduces the profile height of the antenna, offering significant engineering applications.
Key words : ultra-wideband；low profile,；tightly coupled,；Vivaldi antenna
