| 摘要: |
| 设计了一种带宽达到18个倍频程的阵列天线。该阵列天线基于传统全金属Vivaldi天线通过引入H面加载在不牺牲剖面的前提下拓展带宽，应用于侦干探通一体化以及有限空间和载荷的机载平台。首先在天线的H面上进行一个锥形渐削式加厚加载以拓展低频带宽，再通过加载金属薄墙抑制谐振点改善高频段阻抗匹配，进一步拓展带宽，单元仿真工作频段为1.39～25.42 GHz（有源驻波小于2.5），单元尺寸仅为9 mm×9 mm×59 mm。最后基于该单元组成8×8阵列，通过延伸辐射臂抑制有限大阵列的边缘截断效应，并在±45°角内进行波束扫描未出现栅瓣。 |
| 关键词: Vivaldi天线 阵列天线 超宽带 H面加载 紧耦合 |
| DOI：10.20079/j.issn.1001-893x.240921004 |
|
| 基金项目: |
|
| An H-plane Loaded Ultra-wideband Vivaldi Array Antenna |
| LIU Yichuan,HE Haidan,LI Xiumei,WEN Jian,CHENG Yan |
| (Southwest China Institute of Electronic Technology,Chengdu 610036,China) |
| Abstract: |
| An array antenna with a bandwidth of 18 octaves is designed,which is based on the traditional all-metal Vivaldi antenna to expand the bandwidth without sacrificing the profile by introducing H-plane loading,and is applied to the integration of reconnaissance,jamming,detection and communication as well as the airborne platforms with limited space and loads.A conical tapering thickening loading on the H-plane of the antenna is carried out in order to expand the low-frequency bandwidth,and then the high-frequency impedance matching is improved by loading a thin metal wall to suppress the resonance point,further expanding the bandwidth,and the operating band of the unit in simulation is 1.39~25.42 GHz(active voltage standing wave ratio＜2.5),and the size of the unit is only 9 mm×9 mm×59 mm.Finally,based on the unit,an 8×8 array is formed.By extending the radiating arm to suppress the edge truncation effect of the finite large array,no gate flap appears in beam scanning in ±45°. |
| Key words: Vivaldi antenna array antenna ultra wideband H-plane loading tight coupling |
