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首页> 外文学位 >Modeling waveguide antenna arrays in the near and far-field regions using subarrays of equivalent uniformly illuminated waveguide antennas.
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Modeling waveguide antenna arrays in the near and far-field regions using subarrays of equivalent uniformly illuminated waveguide antennas.

机译：使用等效的均匀照明的波导天线的子阵列在近场和远场区域中建模波导天线阵列。

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摘要

Determining the electric field pattern of waveguide antennas in the near-field region is becoming increasingly important in many applications (microwave-induced hyperthermia, phased-array radar, microwave heating/drying systems). One of the methods that has been used to make calculations in the near-field region is the equivalent dipole method. This method, while accurate in the far-field region, becomes increasingly inaccurate at small distances from the antenna being analyzed. This dissertation presents a new method, called the equivalent waveguide method, in which the electric field pattern in both the near and far-field regions of a waveguide antenna is determined by replacing the waveguide antenna by an array of smaller, uniformly-illuminated waveguide antennas. Comparisons between the equivalent waveguide method, the equivalent dipole method and the measured electric field patterns are made. These calculations and measurements show that the equivalent waveguide method is more accurate, is much simpler to implement and executes in a much shorter amount of time than the previous published equivalent dipole method. Furthermore, this method is quite general in scope, and is suitable for analyzing any aperture antenna whose aperture fields are either known or can be approximated.
机译：在许多应用（微波感应热疗，相控阵雷达，微波加热/干燥系统）中，确定近场区域中的波导天线的电场方向变得越来越重要。在近场区域进行计算的一种方法是等效偶极方法。该方法虽然在远场区域中是准确的，但在距被分析天线的小距离处变得越来越不准确。本文提出了一种称为等效波导法的新方法，该方法通过用较小的，均匀照明的波导天线阵列代替波导天线来确定波导天线近场和远场区域中的电场方向图。 。比较了等效波导法，等效偶极子法和测得的电场方向图。这些计算和测量结果表明，等效波导方法比以前公布的等效偶极子方法更准确，更容易实现且执行时间更短。此外，该方法在范围上是相当通用的，并且适合于分析其孔径场是已知的或可以近似的任何孔径天线。

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