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首页> 外文期刊>Applied Computational Electromagnetics Society journal >Electrical Performance Estimations for Shaped Dielectric Lens Antenna with Array Feed
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Electrical Performance Estimations for Shaped Dielectric Lens Antenna with Array Feed

机译：带阵列馈电的异型介电透镜天线的电性能估计

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摘要

A shaped dielectric lens antenna with simple array feeds was developed to realize wide-angle beam scanning in car-mounted radar systems. The electrical performance of the dielectric lens antenna has been previously studied through electromagnetic simulations. The authors fabricated a practical dielectric lens antenna operating at 20 GHz and measured its performance. A convenient patch antenna configuration was developed for the array feed. A power divider comprising eight branched microstrip lines was designed in order to achieve precise excitation coefficients for the array feed. Design accuracy of the array feed was confirmed from measured and calculated results for the excitation coefficients and radiated electric field. To determine the wide-angle beam scanning characteristics, the aperture amplitude and phase distributions were estimated numerically using the obtained array radiated electric field. Excellent flat-phase characteristics were confirmed. The commercial electromagnetic simulator FEKO was employed for the numerical simulations. The radiation patterns at a 30° beam scanning angle were measured. Very good agreements between the measured and calculated results were found. Moreover, sufficient antenna gain was confirmed through experiments.
机译：开发了具有简单阵列馈源的成形介电透镜天线，以实现车载雷达系统中的广角波束扫描。先前已经通过电磁仿真研究了介电透镜天线的电性能。作者制作了一种工作在20 GHz的实用介电透镜天线，并测量了其性能。为阵列馈电开发了一种方便的贴片天线配置。设计了包括八个分支微带线的功率分配器，以实现阵列馈电的精确激励系数。从激励系数和辐射电场的测量和计算结果可以确定阵列馈电的设计精度。为了确定广角光束的扫描特性，使用获得的阵列辐射电场对开口的振幅和相位分布进行了数值估计。确认了优异的平相特性。商业电磁模拟器FEKO被用于数值模拟。测量了在30°光束扫描角下的辐射图。在测量结果和计算结果之间找到了很好的一致性。此外，通过实验证实了足够的天线增益。

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