The gain enhancement using superstrate has been widely investigated. Different from the existing research work, this letter focuses on the study of dielectric slab superstrate (DSS) antenna element with electrically small size. For the electrically small DSS antenna, the gain enhancement mechanism based on the multireflections between interfaces with infinite sizes is no longer available. By using a plug-in optimizer based on Python programming and HFSS simulation software, the optimized designs of electrically small two-layer and three-layer DSS patch antennas operating at 6 GHz are introduced. To validate the predicted results, the two optimized antennas are fabricated and measured. For the two-layer DSS patch antenna, the measured peak gain, 3 dB gain bandwidth, impedance bandwidth, and the aperture efficiency are 10.47 dBi, 22%, 20.7%, and 379%, respectively. For the three-layer DSS patch antenna, the measured peak gain, 3 dB gain bandwidth, impedance bandwidth, and the aperture efficiency are 10.55 dBi, 42%, 28.7%, and 386%, respectively.

中文翻译：

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具有高增益和宽带的电介质板覆层电小型天线

使用覆层的增益增强已被广泛研究。与现有的研究工作不同，本文重点研究电小尺寸的介质板覆层（DSS）天线振子。对于电小型DSS天线，基于无限尺寸界面之间多次反射的增益增强机制不再可用。通过使用基于Python编程和HFSS仿真软件的插件优化器，介绍了工作在6GHz的电小型二层和三层DSS贴片天线的优化设计。为了验证预测结果，制造并测量了两个优化的天线。对于两层DSS贴片天线，实测峰值增益、3 dB增益带宽、阻抗带宽、孔径效率分别为10.47 dBi、22%、20.7%、和 379%，分别。对于三层DSS贴片天线，实测峰值增益、3 dB增益带宽、阻抗带宽和孔径效率分别为10.55 dBi、42%、28.7%和386%。