几种共面波导耦合馈电装置的特性研究
doi: 10.3724/SP.J.1146.2006.01086
Characteristics and Applications of Several Coplanar Waveguide Feeding Devices
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摘要: 该文研究了4种共面波导耦合缝对单贴片微带天线的谐振频率以及带宽的影响，并利用天线近场分布对其进行解释；分析并比较了几种耦合缝的馈电特性，极大地提高了天线设计的灵活性；运用变频思想对馈电装置进行改进设计出了一阻抗带宽达28.9%的宽频带天线，在3.76～4.80GHz的工作频段内天线增益均大于8dBi，增益带宽达24.2%。Abstract: The effects of four coupling slots on antenna resonance frequency and bandwidth are studied respectively. And these effects are explained with the near field distributions. Feeding characteristics of several coupling slots are analyzed and compared, which greatly improve the flexibility of antenna design. By modifying the feeding device with the conversion idea, a broadband microstrip antenna is designed with a bandwidth of 28.9% .The gain is more than 8dBi in the operating frequency band of 3.76～4.80GHz. The gain bandwidth is 24.2%.
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