一种新型定频波束可调微带漏波天线的仿真研究  

Simulation of a novel frequency-fixed beam-steering microstrip leaky-wave antenna

作　　者：刘菊华[1] 郭建炎[1] 龙云亮[1] 

机构地区：[1]中山大学电子与通信工程系,广东广州510275

出　　处：《电波科学学报》2008年第4期694-698,共5页Chinese Journal of Radio Science

基　　金：国家自然科学基金(60571036);国家自然科学基金-广东省联合基金U0635003);广东省自然科学基金(04009740)

摘　　要：提出了一种新型的定频波束可调微带漏波天线。通过在微带漏波天线的辐射边缘周期性地加载微带电感,可减小微带漏波天线的相位常数,进而减小微带漏波天线的主波束方向角。微带电感是一末端短路的短微带线。应用时域有限差分法(FDTD)对这种加载微带电感的微带漏波天线进行仿真分析得出,当频率为10.5GHz,未加载微带电感的微带漏波天线主波束方向角为53°,加载微带电感可使得微带漏波天线主波束方向角减小到11°,当减小微带电感的长度或减小微带电感间的距离时,微带漏波天线主波束方向角会减小。本文FDTD仿真结果与软件HFSS仿真结果十分吻合。A novel frequency-fixed beam-steering microstrip leaky-wave antenna （MLWA） is proposed. The phase constant of MLWA decreases with microstrip inductors loading along the leaky line, which results in the decrease of the main beam direction angle of MLWA. The microstrip inductor is a short microstrip with one end shorted. The effect of microstrip inductors loading on MLWA was analyzed with the finite difference time domain （FDTD） method. At frequency 10. 5 GHz, the main beam direction angle of MLWA without microstrip inductors loading is 53°. With microstrip inductors loading on MLWA, the main beam direction angle of MLWA can be decreased to 11°. By decreasing the length of microstrip inductors or by decreasing the distance between microstrip inductors, the main beam direction angle of MLWA can be decreased. The FDTD results agree well with those from HFSS simulation.

关 键 词：微带漏波天线 定频波束可调 微带电感 

分 类 号：TN820.12[电子电信—信息与通信工程]