The working frequency band of the ultra-wideband omnidirectional unmanned aerial vehicle antenna can cover 400-560MHz, and the ultra-wideband omnidirectional unmanned aerial vehicle antenna comprises a radiation structure, a grounding plate, a feed structure and an air dielectric layer, the upper-layer metal patch comprises four water-drop-shaped patches and a circular patch; the shape of the grounding plate is the same as that of the upper-layer metal patch, but the size is slightly larger. By using the radiation patch with a gradual change structure, impedance conversion from a feeding point to a free space is realized, the performance of the antenna changes slowly along with the frequency, the bandwidth of the antenna is improved, meanwhile, the feeding point is distributed at the two independent patches, the isolation of the antenna can be improved, the metal feeder loaded with a 50-ohm resistor is introduced, and the bandwidth of the antenna is improved. According to the antenna, the current path and distribution on the patch are changed, the resonance efficiency of the antenna is reduced, the requirements of large bandwidth and high gain are effectively met with fewer materials, the feed mode of two ports is set to be in-phase equal-amplitude feed, the distortion of an antenna pattern is prevented, and the omnidirectional performance of the antenna is ensured.
本发明公开一种超宽带全向无人机天线,工作频段可覆盖400‑560MHz,包括辐射结构、接地板、馈电结构和空气介质层;上层金属贴片包括四片水滴状贴片和圆形贴片;接地板的形状与上层金属贴片相同,但尺寸稍大。本发明通过使用渐变结构的辐射贴片,实现从馈电点到自由空间的阻抗变换,使天线性能随频率的变化缓慢,提高天线带宽,同时馈电点分布在两个单独的贴片处能够提高天线的隔离度,且引入加载50Ω电阻的金属馈线,改变贴片上电流路径及分布,降低天线谐振效率,以较少材料有效达到大带宽、高增益要求,将两个端口馈电方式设为同相等幅馈电,防止天线方向图发生畸变,保证天线的全向性。
Ultra-wideband omnidirectional unmanned aerial vehicle antenna
一种超宽带全向无人机天线
2024-12-20
Patent
Electronic Resource
Chinese
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