Manipulation of evanescent waves in a waveguide with gradient-index metamaterials is analyzed. It is shown that evanescent waves excited by a cutoff waveguide can be efficiently transmitted over a long distance by a mode-conversion mechanism. The experimental results are in good agreement with simulated results, and the manipulation is of broadband frequencies. The results suggest potential applications in subwavelength microwave transmission.

中文翻译：

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在渐变波导中处理E逝波

分析了渐变指数超材料在波导中对e逝波的操纵。结果表明，由截止波导激发的e逝波可以通过模式转换机制有效地长距离传输。实验结果与模拟结果吻合良好，操纵范围为宽带。结果表明在亚波长微波传输中的潜在应用。