Design and measurement of a kind of dual polarized Vivaldi antenna
Design and measurement of a kind of dual polarized Vivaldi antenna
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DOI：
10.1109/csqrwc.2011.6036993
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发表时间：
2011-07
期刊：
影响因子：
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通讯作者：
Song Lizhong;Fang Qingyuan
中科院分区：
文献类型：
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作者：
Song Lizhong;Fang Qingyuan
为了满足实际工作的需要，设计并制作了一种双极化超宽带Vivaldi天线。所设计的天线的工作频率范围为3.1 ~ 10.6GHz，所设计的双极化Vivaldi天线由两个单极化Vivaldi天线正交放置而成。对于每个单极化Vivaldi天线，设计了一种线性渐变微带馈电结构来实现阻抗匹配。这两条馈电微带线是分开的，以实现每个极化端口的独立馈电。对双极化Vivaldi天线的结构和参数进行了设计和仿真。制作的双极化Vivaldi天线在电波暗室中进行了测试。隔离度约为20 dB，每个极化端口的增益大于1.37dBi。给出了一些实测的方向图和增益曲线。但两个端口的性能并不对称，部分特性参数与仿真结果相比还不够理想，需要通过提高工艺水平进一步改善。本文的设计和实验结果可为其他双极化超宽带天线的制作提供技术参考。
This paper designed and fabricated a dual polarized ultra wide band (UWB) Vivaldi antenna in order to meet the requirement of the practical work. The discussed working frequency range of the designed antenna is 3.1∼10.6GHz, the designed dual polarized Vivaldi antenna is composed of two single polarized Vivaldi antennas which are orthogonally laid. For each single polarized Vivaldi antenna, a linear tapered microstrip feeding structure is designed to realize the impedance matching. These two feeding microstrip lines are separated to realize independent feeding of each polarized port. The structure and parameters of the dual polarized Vivaldi antenna is designed and simulated. The fabricated dual polarized Vivaldi antenna is measured in the anechoic chamber. The isolation degree is about 20dB and the gain o f each polarization port is larger than 1.37dBi. Some measured patterns and gain curves are given. Yet the performances of two ports are not symmetric and some characteristic parameters are not ideal compared with the simulation results which should be further improved through improving the fabrication level. The design and experimental results in this paper can provide a technical reference for the fabrication of other dual polarized UWB antennas.