CAJ | 학술논문

在对传统八木天线分析的基础上,为提高天线使用的灵活性和工作带宽,设计了一种以2.4GHz为中心工作频率的参数可变的18单元八木天线。设计过程中利用VB软件设计了一款天线计算器,方便了天线尺寸参数的计算和优化调整,还使用HFSS软件搭建天线的模型,并对其中一种参数方案进行仿真优化。测量结果表明：在2.3GHz～2.5 GHz频率范围内,天线方向图较好,与仿真结果较为吻合,天线输入端电压驻波比和回波损耗较为理想。
재대전통팔목천선분석적기출상,위제고천선사용적령활성화공작대관,설계료일충이2.4GHz위중심공작빈솔적삼수가변적18단원팔목천선。설계과정중이용VB연건설계료일관천선계산기,방편료천선척촌삼수적계산화우화조정,환사용HFSS연건탑건천선적모형,병대기중일충삼수방안진행방진우화。측량결과표명：재2.3GHz～2.5 GHz빈솔범위내,천선방향도교호,여방진결과교위문합,천선수입단전압주파비화회파손모교위이상。
In order to increase the flexibility and the bandwidth,this paper presents a parameters adjustable Yagi-Uda antenna with 18 units that operate at the center frequency 2.4GHz on the basis of theoretical analysis of traditional Yagi-Uda antennas.An antenna calculator with Visual Basic software is designed to calculate and adjust the parameters.Using the HFSS software is used to construct,simulate and optimize the antenna model for a kind of scenario as well.Measured results show that the antenna has a good characteristic with symmetrical beam width,broad impedance bandwidth,little number of side lobes and voltage standing wave ratio and echo loss are relatively ideal in 2.3GHz～2.5GHz frequency range,which agree well with simulated results.