一种小型化超宽带定向双极化天线设计

Design of a Compact Ultra-wideband Directional Dual Polarized

文章提出了一种应用于超宽带定向双极化天线的小型化设计。该种天线设计方案是基于改进型Vivaldi天线单元类型。该天线设计主要是由指数渐变形贴片和背面的矩形馈电线组成,通过在贴片上加载缝隙和加载电阻的方法拓展带宽和减小天线的结构尺寸。采用常规PCB加工工艺,通过组装焊接,最终实现天线整体尺寸达到0.315λ×0.261λ×0.002λ。实测结果表明,天线的阻抗带宽(S11<-10dB)为66.7%,增益在阻抗带宽内0°方向上最低可达到1.36dBc。根据仿真结果加工天线实物并进行测试验证,结果表明,实测结果与仿真结果基本一致。

A compact ultra-wide band directional antenna based on the dual polarized applications studied in this paper. The antenna design is based on the improvement of Vivaldi antenna. The element of the antenna is consists of a exponential gradient type patch up on the substrate and a regular feeding line on the bottom of the substrate. Through loading slot and resistance on the patch, we can extend the bandwidth and reduce the size of the antenna. The antenna is fabricated by normal PCB process and then realized by assembling welding. Finally, the hole antenna sizes up to 0.315 λ× 0.261 λ× 0.002 λ. The measured results show that the impedance matching bandwidth (S11<-10dB) is 66.7%. The minimum realized gain at the main radiation direction up to 1.36dBc. Both of the experimental and simulated results have a good agreement.