A full-wave leaky-wave analysis of 1-D periodically corrugated metallic surfaces with wide gaps is presented. Such wide gaps, in the order of half-wavelength, are employed in the most cited designs for corrugated metallic antenna implementation due to the high attainable gain performance. A full-wave periodic unit cell method is described and implemented on a corrugated metal surface design for the first time. The results are compared with the known matrix pencil method. The complex dispersion characteristics verify that these structures operate as leaky-wave antennas. The calculated wavenumber of the leaky mode is then used for the analytical calculation of the radiation patterns of a finite-size antenna, based on a simple array factor approach and a near-field inspection of the electric fields of the simulated unit cell. The calculated patterns are compared to those obtained from a commercial simulation software (CST Microwave Studio), exhibiting a very good agreement.

中文翻译：

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一维周期性波纹金属表面天线的全波泄漏波分析

提出了具有较大间隙的一维周期性波纹金属表面的全波泄漏波分析。由于可获得的高增益性能，在波纹金属天线实施中被引用最多的设计中采用了这种约一半波长的宽间隙。首次描述并在波纹金属表面设计上实现了全波周期晶胞方法。将结果与已知的矩阵笔法进行比较。复杂的色散特性验证了这些结构可以用作漏波天线。然后，基于简单的阵列因子方法和对模拟晶胞的电场进行近场检查，将计算出的泄漏模波数用于有限尺寸天线的辐射方向图的解析计算。