A highly homogeneous microwave zero-index metamaterial based on high-permittivity SrTiO₃ ceramics is demonstrated to realize the small-aperture high-directivity antenna. Such a novel technique is a remarkable step forward to develop compact devices with better performance.

中文翻译：

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高度均匀的零折射率超材料使设备更紧凑、性能更好

_{基于高介电常数SrTiO 3}陶瓷的高度均匀微波零折射率超材料被证明可以实现小孔径高方向性天线。这种新技术是开发具有更好性能的紧凑型设备的显着进步。