【摘要】 在文章中,一种新型的可同时覆盖2G,3G,4G移动通信的超宽带天线被设计并制作出来。该天线综合采用了端部加载技术和特殊的双套筒技术。天线端部加载部分对天线输入阻抗的虚部起到了抵消的作用,从而使天线的阻抗曲线变化平缓,达到了拓宽天线阻抗带宽的目的。实测结果表明,在S11<-10d B条件下,该天线工作频率范围为0.783GHz~2.773GHz,即阻抗带宽为3.47:1,相对带宽为110.6%。在VSWR<1.5的条件下,该天线工作频率范围为0.86GHz~2.07GHz,即阻抗带宽为2.41:1,相对带宽为82.6%。同时,该天线具有水平全向的辐射特性。更多还原

【Abstract】 In this article, a novel broadband dual-sleeve antenna that can cover 2G, 3G, 4G communication band is designed and fabricated. This antenna makes use of both end-loaded technology and unusual dual-sleeve technology. The end-loaded part of the antenna can offset the imaginary part of the antenna’s input impedance, so that the impedance curve of the antenna changes gently and the purpose of expanding the bandwidth of the antenna is achieved. Test results indicate that, on condition that S11<-10 d B, the working frequency range of the antenna is 0.783GHz~2.773 GHz, namely the impedance is 3.47:1 and the relative bandwidth is 110.6%. On condition that VSWR<1.5, the working frequency range of the antenna is 0.86GHz~2.07 GHz, namely the impedance bandwidth is 2.41:1 and the relative bandwidth is 82.6%. Meanwhile, this antenna has omnidirectional radiation characteristics in the horizontal direction.更多还原