电波科学学报2017，Vol.32Issue(6)：742-750,9.DOI:10.13443/j.cjors.2017052901
基于谐振式反射器的UHF/S双频双定向蝶形天线
Resonance based reflector based UHF/S bow-tie antenna with two opposite uni-directional radiation bands
摘要
Abstract
Two ring-shape resonance based reflectors (RBR) with different operating frequencies are used to design a broadband directional bow-tie UHF/S antenna with two opposite uni-directional radiation bands.The RBR has the characteristic of "in-phase reflection" in a wide frequency band and it does not need a periodic structure.Therefore,the distance between antenna and RBR is much smaller than λ/4 and the whole area is relatively small when the RBR is used as the reflector for an antenna.The two ring-shape RBRs have different sizes and they are placed over and under the antenna,respectively.Though one RBR is placed on the radiation (reflecting) direction of the other,the radiation to each other still exists.Thus,the radiations of the lower UHF and the upper S-frequency bands of the antenna point to the+z axis and the-z axis,respectively.The antenna is fed from its side not back to avoid the effect to the antenna radiation.Though two reflectors are used,the overall size of the antenna is only 0.45λ × 0.4λ × 0.2λ,and the impedance bandwidth is more than 100％.The antenna demonstrates good uni-directional performance,whileits relative directional bandwidths (front-to-back ratio＞ 5 dB) at the lower and higher frequency bands are 58％ and 41.6％,respectively.关键词
谐振式反射器/小型化/低剖面/双频双定向辐射/宽带定向天线Key words
resonance based reflector/miniaturization/low-profile/two opposite uni-directional radiation bands/broadband directional antenna分类
信息技术与安全科学引用本文复制引用
谢继杨,彭麟,温保健,姜兴..基于谐振式反射器的UHF/S双频双定向蝶形天线[J].电波科学学报,2017,32(6):742-750,9.基金项目
国家自然科学基金(No.61661011,61401110和61371056) （No.61661011,61401110和61371056）
广西自然科学基金(No.2015GXNSFBA139244):桂林电子科技大学研究生教育创新项目(No.2016YJCX76) （No.2015GXNSFBA139244）
