摘 要:目前,印刷四臂螺旋天线可以广泛的应用于诸如移动卫星通讯,广播卫星系统和全球定位系统等多种系统中。然而,对于这些系统应用而言,传统的印刷四臂螺旋天线的带宽已不能满足它们的需求。因此,本文设计一种新型的印刷四臂螺旋天线。展示了一种渐变辐射臂宽度和寄生短路臂相结合的宽带技术。同时本文提出了一种基于平行双线的功分馈电网络,有效的减小了传统四臂螺旋天线馈电网络的尺寸。实测结果表明该天线的工作带宽达到了28%(1.86~2.5GHz)以上。
关键词:宽带天线;圆极化;印刷四臂螺旋天线
作者介绍:
王宸(1985-),男,汉族,陕西汉中人,工程师,博士。研究方向:航空通信系统射频微波技术。
中图分类号:TN823.31 文献标识码:A 文章编号:2096-4706(2018)03-0000-07
Design of Broadband Folded Tapered Printed Quadrifilar HelicalAntenna
WANG Chen
(Southwest China Institute of Electronic Technology,Chengdu 610036,China)
Abstract:Todaythe printed quadrifilar helical antenna(PQHA)can be widely applied to many applications such as mobile satellite communications,broadcasting satellite systems and global positioning systems.Nevertheless,the bandwidth of a conventional PQHA couldbe insufficient for applications. A new PQHA design is investigated in thispaper. A technique of Increasing the bandwidth of the PQHA by modifying thewire width and adding a shorted parasitic helix is presented. And a powerdivider based on double-sided parallel striplines(DSPSL)is proposed to reduce the size of the conventional feeding network. Experimental results show thatthe bandwidth can reach more than 28%(1.86-2.5GHz).
Keywords:Broadbandantenna;circular polarization;printedquadrifilar helical antenna(PQHA)
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