设计了一种工作于毫米波段的金属Vivaldi 天线,天线宽带扫描性能优异。天线结构利用Vivaldi 作为辐射单元,将其集成到带状线耦合的馈电基板上,馈电网络与辐射天线结构相对独立,便于加工。通过仿真得到:在27. 2 GHz ~46. 0 GHz 范围内VSWR<2;在27. 5 GHz ~42. 2 GHz 频段内,天线驻波比在E 面和H 面45毅扫描范围内满足小于2 的匹配特性。文中利用设置周期性边界条件的方法优化天线尺寸并仿真分析天线参数对扫描带宽的影响。通过驻波比、交叉极化、天线增益的仿真分析天线性能。

A kind of metal Vivaldi broadband antenna is designed to work in the millimeter. the broadband scanning performance of the antenna is excellent. The antenna structure utilizes Vivaldi as a radiating element and is integrated it into a stripline coupled feed substrate. The feed network and the radiating structure are relatively independent and the structure is easy to process. Simulation shows: VSWR is less than 2 in the range of 27. 2 GHz ~46. 0 GHz; In the frequency band of 27. 5 GHz ~42. 2 GHz, the antenna VSWR is less than 2 within the 45毅scanning range of the E and H planes. In this paper, the method of setting periodic boundary conditions is used to optimize the antenna size and simulate the influence of antenna parameters on the scanning band width. Antenna performance is analyzed by simulation of standing wave ratio, cross polarization, and antenna gain.

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