Bandwidth-and Gain-Enhanced Vivaldi Antenna Array Fed by Non-uniform T-junction Power Divider for Radio Astronomy Application

摘要：

　　A broadband Vivaldi antenna array with good radiation characteristics for radio astronomy applications is presented in this letter.To achieve a good broadband matching,a non-uniform T-junction power divider(NTPD)is adopted to design the multi-port feeding network of antenna array.Thus,the S11 of the proposed NTPD is improved from-5 to-20 dB and its impedance bandwidth is extended from 5.5 GHz to 6 GHz.Meanwhile,the proposed array presents a gain enhancement with 1dB in the low frequency band(1-3 GHz)and 2 dB in the high frequency band(3-6 GHz)with regard to the original array.To verify the design,the proposed Vivaldi antenna array has been fabricated and measured.Its input impedance,return loss,antenna gain and radiation pattern are studied.The realized gain of the Vivaldi antenna array is 5.7-11.3 dB from 1 to 6 GHz.Finally,a reasonable agreement between the measured and simulated results is observed.

关键词： Non-uniform T-junctions power divider Vivaldi antenna array radio astronomy

作者: Zhengbiao Wang Haiwen Liu Wenjuan Yang Yifan Wang Shuangshuang Zhu Pin Wen

作者单位: School of Information Engineering,East China Jiaotong University Nanchang 330013,China School of Electronic and Information Engineering,Xian Jiaotong University Xian 710049,China

会议类型: 国际会议

会议名称: The 12th International Symposium Antennas, Propagation, and EM Theory(ISAPE 2018)?(第十二届天线、传播与电磁理论国际学术会议)

会议地点: 杭州

会议语种:英文

页码: 1-4

在线出版日期: 2018-12-03（万方平台首次上网日期，不代表论文的发表时间）