This paper presents the rectangular aperture coupled dielectric resonator antenna with dual-band circularly polarized response. The antenna geometry have stair case shaped rectangular dielectric resonator in the form of main radiating element. The specific geometry provides increment of aspect ratio of the dielectric resonator. This allows merging of various resonant frequencies having higher order modes that result in the bandwidth enhancement. This antenna provides 18.63% and 7.68% of -10 dB S11-parameter bandwidth response in operating passbands, respectively. The specific geometry and the introduction of circular slots in ground plane results in the orthogonal modes excitation at the nearby resonant frequencies. Due to this, the circular polarization response at 7.76 and 8.33 GHz frequencies is achieved. The peak gain of 5.8 and 4.6 dBic is obtained in the respective lower and upper operating passbands. Through parametric analysis, tuning of antenna responseis also achieved. The proposed antenna with the optimized parameters may have potential applications in the microwave C- and X-band setups.

中文翻译：

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双频圆极化介质谐振天线的带宽增强技术

本文提出了具有双频圆极化响应的矩形孔径耦合介质谐振器天线。天线的几何形状具有呈主辐射元件形式的阶梯状矩形电介质谐振器。特定的几何形状提供了介电共振器的纵横比的增加。这允许合并具有较高阶模的各种谐振频率，这导致带宽增强。该天线在工作通带中分别提供-10 dB S11参数带宽响应的18.63％和7.68％。特定的几何形状以及在接地平面中引入圆形槽会导致在附近的谐振频率处激发正交模式。因此，可以实现7.76 GHz和8.33 GHz频率下的圆极化响应。峰值增益为5.8和4。在相应的较低和较高工作通带中获得6 dBic。通过参数分析，还可以实现天线响应的调谐。所提出的具有优化参数的天线可能在微波C波段和X波段设置中具有潜在的应用。