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设计了基于双层频率选择表面FSS(Frequency Selective Surfaces)的高增益微带天线。基于双调谐峰原理,设计了具有良好频率选择特性的双层FSS,将其作为微带天线的覆层,制备了一种X波段高增益新型微带天线。利用射线理论,分析了新型天线的工作机理,并通过实测对仿真结果进行了验证。实验结果表明:相比于传统微带天线,加载覆层后的新型天线带宽没有变化,而其方向性得到了明显改善,鼻锥方向增益提高了6.6dB。
A high-gain microstrip antenna based on FSS (Frequency Selective Surfaces) with double frequency-selective surface is designed. Based on the double-tuned peak principle, a double-layer FSS with good frequency selectivity was designed and used as a coating of the microstrip antenna to fabricate a novel high-gain X-band microstrip antenna. Using the ray theory, the working mechanism of the new antenna is analyzed, and the simulation results are verified by real measurement. The experimental results show that compared with the traditional microstrip antenna, the new antenna bandwidth does not change after loading the coating, and its directivity has been significantly improved, the nose cone gain increased by 6.6dB.