Design of a Notched-Band Vivaldi Antenna With High Selectivity

Design of a Notched-Band Vivaldi Antenna With High Selectivity
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高选择性陷波带Vivaldi天线的设计

DOI:
10.1109/lawp.2017.2773707
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发表时间:
2018
影响因子:
4.2
通讯作者:
Wu Wen
Wu Wen
中科院分区:
计算机科学2区
文献类型:
--
作者:
Xu Yanhui;Wang Jianpeng;Ge Lei;Wang Xuedao;Wu Wen

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本文设计并研究了一种具有高频率选择性的陷波带Vivaldi天线。在传统的Vivaldi天线中引入开路半波长谐振器和短路阶跃阻抗谐振器,以获得阻带内的两个陷波极点。通过理论计算两个加载谐振器的谐振频率,可以精确确定两个陷波极点的频率位置,从而实现具有所需陷波频带的宽带天线。为了验证这种新方法的可行性,制作和测试了一个具有145.8%的分数带宽的陷波带天线。结果表明,该天线在4.9 ~ 6.6GHz的陷波频带内具有良好的频率选择性,在通带内具有良好的阻抗匹配、高的辐射增益和良好的辐射方向性。仿真和测量结果具有良好的一致性。
In this letter, a notched-band Vivaldi antenna with high-frequency selectivity is designed and investigated. To obtain two notched poles inside the stopband, an open-circuited half-wavelength resonator and a short-circuited stepped impedance resonator are properly introduced into the traditional Vivaldi antenna. By theoretically calculating the resonant frequencies of the two loaded resonators, the frequency locations of the two notched poles can be precisely determined, thus achieving a wideband antenna with a desired notched band. To validate the feasibility of this new approach, a notched band antenna with a fractional bandwidth of 145.8% is fabricated and tested. Results indicate that good frequency selectivity of the notched band from 4.9 to 6.6 GHz is realized, and the antenna exhibits good impedance match, high radiation gain, and excellent radiation directivity in the passband. Both the simulation and measurement results are provided with good agreement.
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