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首页> 外文期刊>IEEE Transactions on Antennas and Propagation >Ultra-Wideband Quasi-Yagi Antenna Using Dual-Resonant Driver and Integrated Balun of Stepped Impedance Coupled Structure
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Ultra-Wideband Quasi-Yagi Antenna Using Dual-Resonant Driver and Integrated Balun of Stepped Impedance Coupled Structure

机译：采用双谐振驱动器和步进阻抗耦合结构集成巴伦的超宽带准八木天线

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摘要

A quasi-Yagi antenna that has an ultra-wideband performance is presented. To enable that performance, the antenna utilizes a dual-resonant driver and a balun formed using a stepped-impedance coupled structure. The driver is designed to be dual-resonant by loading it with an inductor in the form of short section of narrow microstrip line at a certain position. The balun includes a T-junction of microstrip lines and two pairs of stepped-impedance coupled lines. The simulated and measured performance of the integrated antenna indicate less than $ -10 ~{rm dB} $ reflection coefficient, 3.6–4.5 dBi gain, 13–17 dB front-to-back ratio, less than $-19 ~{rm dB}$ cross-polarization and more than 90% efficiency across more than 75% fractional bandwidth centered at 7.5 GHz.
机译：提出了一种具有超宽带性能的准八木天线。为了实现这一性能，天线利用了双谐振驱动器和平衡-不平衡转换器，该平衡-不平衡转换器采用了步进阻抗耦合结构。通过在特定位置在狭窄的微带线的短部分形式的电感器中加载驱动器，可以将驱动器设计为双谐振。平衡-不平衡变换器包括微带线的T型结和两对步进阻抗耦合线。集成天线的仿真和测量性能表明，反射系数小于<-10 = -10〜{rm dB} $ 增益为4.5 dBi，前后比率为13–17 dB，小于 $-19〜{rm dB} $ 在7.5 GHz上超过75％的小数带宽内，交叉极化和超过90％的效率。

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