一种宽频带低交叉极化伞形印刷振子阵列天线  

Wide-band and low cross-polarization array antenna design using the umbrellalike printed dipole

作　　者：陈盼[1] 曹祥玉[1] 高军[1] 

机构地区：[1]空军工程大学电讯工程学院,陕西西安710077

出　　处：《西安电子科技大学学报》2010年第5期966-970,共5页Journal of Xidian University

基　　金：国家自然科学基金资助项目(60671001)

摘　　要：为了增加天线带宽及降低交叉极化,采用中心balun馈电双层伞形印刷振子天线结构,设计了一种新型宽带阵列天线.仿真表明,天线单元相对阻抗带宽(驻波比小于等于2)为38.8%,交叉极化电平小于-45 dB,前后比优于16.4 dB.阵列天线带宽达到39.4%,H面交叉极化电平小于-48 dB,增益达到16.2 dB.In order to increase the bandwidth and decrease the cross-polarization of the antenna,a novel broadband printed dipole antenna is proposed,which employs a double-layered and umbrellalike printed dipole with an integrated balun feed structure.Simulation results indicate that the relative impedance bandwidth of the double-layered dipole antenna is 38.8%（VSWR≤2）.The front-to-back ratio is better than 16.4 dB and the cross-polarization level is less than-45 dB.The bandwidth of the array antenna is 39.4%,while the cross-polarization of the H-plane is less than-48 dB,and the gain of the array is 16.2 dB.

关 键 词：印刷偶极子 宽带 低交叉极化 阵列天线 

分 类 号：TN821[电子电信—信息与通信工程]