【摘要】 在本文中,一种新型的可覆盖3.1 GHz-10.6GHz(UWB)的超宽带天线被设计并制作出来,可用于超宽带通信。这种新型超宽带天线采用了端部加载技术和双套筒技术,并在此基础上加以改进,改善了性能指标,降低了加工难度。端部加载的部分对天线输入阻抗的虚部起到了抵消的作用,使得天线的阻抗随频率变化的曲线趋于平缓,实现更好的阻抗匹配,达到了拓宽天线阻抗带宽的目的。实测结果表明,在S11<-10d B的条件下,该天线的工作频率范围为2.91GHz~10.75GHz,其阻抗带宽为3.69:1,相对带宽为114.8%。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 UWB antenna that can cover 3.1 GHz-10.6GHz is designed and fabricated. This antenna makes use of both end-loaded technology and dual-sleeve technology. The end-loaded part can offset the imaginary part of the antenna’s input impedance, so that the impedance curve changes gently with the frequency and the purpose of expanding the bandwidth of the antenna is achieved. Antenna test results indicates that, on condition that S11<-10 d B, the working frequency range of the antenna is 2.91GHz~10.75 GHz, namely the impedance is 3.69:1 and the relative bandwidth is 114.8%. Meanwhile, this antenna has omnidirectional radiation characteristics in the horizontal direction.更多还原