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首页> 外文期刊>International journal of RF and microwave computer-aided engineering >Dielectric loaded directive Vivaldi antenna considering dispersion in near and far field
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Dielectric loaded directive Vivaldi antenna considering dispersion in near and far field

机译：考虑在近和远场中的分散的介电加载指令Vivaldi天线

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摘要

A “V” slot dielectric loaded antipodal Vivaldi antenna is proposed in this article,which provides significant improvement for directivity, front to back loberatio and low side lobe level over the operating frequency band from 1.76 GHzto 10 GHz. Initially, the 35° upward tilted parallel slots are placed along theouter curvy conductor edges of the antenna to maintain the desired radiationperformances and impedance matching. Thereafter the V slot extended dielectricslab is integrated with this design for the improvement of radiation performancesand pulse spreading effect while maintaining high directivity. Theantenna prototype is fabricated and tested which shows the return loss isbelow the 10 dB, maximum directivity is achieved at 10 GHz which is 17.5 dBiand front-to-back lobe level ratio is 29.2 dB, almost triple as compare to conventionalVivaldi antenna at 9 GHz. The measured results depicts that thehighest main lobe squint angle is 2.7° at 6 GHz. In addition to this, the measuredsystem fidelity factor (SFF) is 0.86 and 0.91 at near and far field respectivelywhich confirms that the V slot actually reduces the pulse spreading anddispersion effect while maintaining the high directivity.
机译：本文提出了“V”槽介质负载的反双向Vivaldi天线，这为方向性，前后叶片提供了重大改进在1.76 GHz的工作频带上的比率和低侧凸瓣电平到10 GHz。最初，35°向上倾斜的平行槽沿着天线的外曲线导体边缘以保持所需的辐射表演和阻抗匹配。此后V槽扩展电介质板坯与这种设计集成，以改善辐射性能和脉冲传播效果，同时保持高方向性。这制造和测试的天线原型，其显示回报损耗是低于10 dB，在10 GHz实现最大方向性，即17.5 dbi和后退叶片水平比例为29.2 dB，几乎三倍与传统相比在9 GHz的Vivaldi天线。测量结果描述了最高的主瓣斜视角在6 GHz时为2.7°。除此之外，测量了系统保真因子（SFF）分别为近和远场的0.86和0.91这证实了V插槽实际上减少了脉冲扩展和在保持高方向性的同时分散效应。

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