漏波波导的辐射特性及口径场分布选择

Radiation Characteristics and the Aperture Distribution Selection of the Leaky Waveguide

根据微扰法和横向谐振法,对漏波波导的辐射特性进行了理论数值计算,并与数值仿真计算结果进行比较。结果表明,在偏离微扰条件的情况下,需要对其衰减系数的理论计算结果进行修正,采用一个二元多项式来拟合等效缝宽度计算衰减系数的方法能够取得与仿真计算比较一致的结果。在天线设计的过程中,分析了不同口径场分布与衰减系数分布的关系。结果表明,在小型化设计的要求下,余弦分布的口径场是能够实现的。

The radiation characteristics of the leaky waveguide have been calculated theoretically based on the perturbation solution of the transverse resonance equation, and compared with the simulation results. The results indicate that, when the perturbation condition departures, the theoretical value of the attenuation coefficient needs to be modified and a relatively ideal result is obtained through fitting the distance between the adjacent poles based on a bivariate polynomial. Furthermore, the relation between different patterns of aperture field distribution and different attenuation coefficient distribution is analyzed; the results show that a relatively ideal cosine distribution aperture field can be realized under the requirements of miniaturization.