介质平板透镜提高天线增益的原理研究

Principles of antenna gain enhancement via dielectric plate lens

采用了基于光学理论和电磁理论相结合的分析方法,对介质平板透镜提高天线增益的原理进行了分析,结果表明该方法比传统方法能够更有效地提高天线的增益.并以双层微带贴片天线加载介质平板透镜为例,进行了参数分析与优化.理论分析和电磁仿真均表明,合理选择介质平板透镜的参数可以有效地提高微带天线单元的增益、减小天线阵列的规模,从而验证原理了的有效性.

A novel technique based on optical theory and electromagnetic theory is presented to improve the gain of the dielectric plate len. The mechanism of gain en-hancement via a dielectric plate len is analyzed with the presented method. The re-sults show that the method is more efficient and stable than the traditional ones. A parametric study on double-deck microstrip antenna covered by a dielectric plate len is performed to validate the method. Both the theory analysis and the numerical simulation indicate that dielectric plate lens with appropriate electromagnetic pa-rameters can not only improve the gain of the microstrip antenna significantly, also greatly reduce the size of the antenna array.