This paper presents a novel dual-band (DB) dual-polarized (DP) shared aperture antenna with high isolation by using a combination of microstrip dipoles and dielectric resonator antennas (DRAs) for S and C bands, respectively. In the S band, two sets of proximity coupled stacked microstrip dipoles which crossed at the center are employed to achieve dual-linear polarization (DLP) and obtain desired bandwidth (BW), isolation, and pure polarization. The rectangle DRA with hybrid feed is selected as the C band element for its advantages of small base area and high isolation, and a 2 × 2 array is presented with the “pair-wise” anti-phase feed technique to achieve a low cross-polarized level. Moreover, benefited from the back feed scheme, the proposed antenna has a symmetrical structure and has the potential of expanding into a larger aperture. The proposed antenna has been manufactured and measured, and the results agree well with simulations, which prove the validity of the proposed design.

中文翻译：

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一种新型高隔离双频双极化共享孔径天线

本文提出了一种新颖的双频带 (DB) 双极化 (DP) 共享孔径天线，该天线通过分别针对 S 和 C 频带使用微带偶极子和介质谐振器天线 (DRA) 的组合来实现高隔离度。在S波段，采用在中心交叉的两组邻近耦合堆叠微带偶极子实现双线性极化（DLP），获得所需的带宽（BW）、隔离度和纯极化。选择混合馈电的矩形 DRA 作为 C 波段元件，具有基面积小、隔离度高的优点，并采用“成对”反相馈电技术呈现 2×2 阵列，以实现低交叉极化水平。此外，受益于反向馈电方案，所提出的天线具有对称结构，并具有扩展到更大孔径的潜力。