A technique is proposed for the enhancement of gain and circularly polarised (CP) bandwidth of a singly-fed CP dielectric resonator (DR) antenna. The specific geometry of DR is used to generate the orthogonal modes required for obtaining the CP response. The incremental harmonics of the fundamental and third-order modes, and , are generated by stacking of the similar DR layer topped with metallic patch after an air gap. This enhances the gain and CP bandwidth of the antenna maintaining the generated orthogonal modes with the required phase difference. The antenna with single DR layer provides the CP bandwidth of 13.56% and gain 4.04 dBic. After stacking, the antenna provides the measured CP bandwidth of 24.75% and 7.32 dBic stable gain over the passband. In addition, the antenna provides 92.87% radiation efficiency in the passband.

中文翻译：

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单馈圆极化介质谐振器天线的增益和带宽增强

提出了一种用于增强单馈CP电介质谐振器（DR）天线的增益和圆极化（CP）带宽的技术。DR的特定几何形状用于生成获得CP响应所需的正交模式。基波和三阶模的增量谐波， 和 通过在气隙后堆叠类似的DR层并覆盖金属补丁来生成。这提高了天线的增益和CP带宽，从而以所需的相位差保持了生成的正交模式。具有单DR层的天线提供了13.56％的CP带宽和4.04 dBic的增益。堆叠后，天线在通带上提供了24.75％的测量CP带宽和7.32 dBic的稳定增益。此外，该天线在通带中可提供92.87％的辐射效率。