宽带低剖面多极化发射阵列天线的设计

Design of broad-band and low-profile multi-polarized transmitting array antenna

摘要:

设计了一个宽带二维扫描三角栅格多极化发射阵列，阵列天线采用双极化全金属Vivaldi结构。金属Vivaldi天线小型化可满足三角栅格的布阵条件，依据极化形成理论，研究其多极化形成特性以适应更多元化的应用。通过样机实测结果表明，该天线阵在X、Ku频段内(工作带宽3:1)可实现大功率多极化形成；在有源驻波比(VSWR)小于3时，方位面和俯仰面扫描角可达到±30°；等效辐射功率(扫描角±30°内)可达到110 kW；阵列剖面为17 mm。

Abstract:

A broadband two-dimensional scanning triangular grid multi-polarization transmission array has been designed, with the array antenna adopting a dual-polarized all-metal Vivaldi structure. The miniaturization of the metal Vivaldi antenna can meet the array conditions of the triangular grid. Based on the theory of polarization formation, the characteristics of its multi-polarization formation are studied to adapt to more diversified applications. The prototype measurement results indicate that the antenna array can achieve high-power multi-polarization formation within the X and Ku frequency bands (operating bandwidth ratio of 3:1); with an active Voltage Standing Wave Ratio(VSWR) less than 3, the azimuth and elevation scanning angles can reach ±30°; the equivalent radiated power (within ±30° scanning angle) can reach 110 kW; the array profile is 17 mm.