摘要
文章介绍了一款工作在VHF波段的同轴型缝隙天线。针对一段两端封闭的同轴结构,通过理论分析得出其内部可能存在类似于矩形波导模式的电磁波模式。在此基础上,设计了适当的开缝和探针馈电结构,使其具有水平极化波辐射能力。天线相比目前的同轴缝隙天线拥有更小的电尺寸,达到了小型化的效果。仿真结果表明,天线谐振点位于118.5MHz,-10d B阻抗带宽为3.7%,且增益可以达到4.17d B。鉴于原型天线尺寸过大,特制作了10:1的天线缩比模型进行测试,测试结果与期望值吻合良好。
This paper introduces a coaxial slot antenna operating in the VHF band. For a coaxial structure with shorted terminals, the electromagnetic wave modes may exist in the interior of the coaxial structure are similar to the electromagnetic wave modes that exist in rectangular waveguide by theoretical analysis. On this basis, a suitable slotted and probe feed structure is designed, so that it has the capability of radiating horizontal polarized wave. This antenna has smaller size than the current coaxial slot antenna at the same frequency. The simulation results show that the antenna resonant point is at 118.5MHz, the impedance bandwidth of-10 d B is 3.7%, and the gain can reach 4.17 d B. In view of the prototype antenna size is too large, so a 10： 1 antenna shrinkage model is made for testing, and the test results are in good agreement with the calculation results.
作者
付云
袁斌
梁鹏飞
张飞跃
姚磊
Fu Yun Yuan Bin Liang Pengfei Zhang Feiyue Yao Lei(School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong Universit)
出处
《电子技术（上海）》
2017年第1期30-32,共3页
Electronic Technology
