CAJ | 학술논문

套筒天线的发现一定程度上拓展了线天线的带宽，但是传统的套筒天线在VSWR<8的条件下带宽只有4：1。文献[1]提出了一种新型的宽带套筒天线，在VSWR<1.5的情况下可以达到1.81：1的阻抗带宽。本文对这种新型宽带套筒天线中特殊的结构进行讨论，主要讨论端部加载对该新型天线S11的影响，经研究发现端部加载可以很大程度上拓展天线带宽，在同样尺寸的情况下将传统套筒天线的阻抗带宽（VSWR<1.5）由1.03：1拓展到1.81：1，即带宽拓展了75.7%。在S11<-10dB的条件下由1.09：1拓展到2.05：1，即带宽拓宽了88.1%，在天线没有小型化处理时可以拓展到3.81：1。因此这为天线阻抗的良好匹配提供一种新的方法，同时也很好的弥补了传统套筒天线结构上不连续的不足。
투통천선적발현일정정도상탁전료선천선적대관，단시전통적투통천선재VSWR<8적조건하대관지유4：1。문헌[1]제출료일충신형적관대투통천선，재VSWR<1.5적정황하가이체도1.81：1적조항대관。본문대저충신형관대투통천선중특수적결구진행토론，주요토론단부가재대해신형천선S11적영향，경연구발현단부가재가이흔대정도상탁전천선대관，재동양척촌적정황하장전통투통천선적조항대관（VSWR<1.5）유1.03：1탁전도1.81：1，즉대관탁전료75.7%。재S11<-10dB적조건하유1.09：1탁전도2.05：1，즉대관탁관료88.1%，재천선몰유소형화처리시가이탁전도3.81：1。인차저위천선조항적량호필배제공일충신적방법，동시야흔호적미보료전통투통천선결구상불련속적불족。
The invention of sleeve antenna expands the bandwidth of wire antenna to some extent, but the bandwidth of traditional sleeve antenna can only reach 4:1 on the condition of VSWR<8. Literature [1] proposed a new type of sleeve antenna, whose impedance bandwidth can reach up to 1.81:1 on the condition of VSWR<1.5. This paper discusses the structure of this special antenna and mainly focuses on the impact of end-loading on the antenna’s S11. Some research reveals that the end-loading can notably expand the bandwidth of antenna. With the similar size, this new broadband sleeve antenna can expand the bandwidth of traditional sleeve antenna from 1.03:1 to 1.81:1(at VSWR<1.5), which means an expansion of 75.7%in bandwidth. And on the condition of S11<-10dB, the expansion from 1.09:1 to 2.05:1 is achieved, i.e. an improvement of 88.1%, and on the condition of antenna not being miniature processed the bandwidth can be expanded up to 3.81:1. Thus it provides a new method to improve antenna’s impedance matching characteristics and broaden antenna’s impedance bandwidth. This new structure also compensate for the deficiency of the traditional sleeve antenna’s discontinuity in structure.