A differential-fed gain-enhanced dual-polarized dielectric patch antenna operating at higher order TM121 and TM321 modes is investigated in this letter. The introduction of grounded bars in a conventional square dielectric patch resonator (DPR) is a key technique in the proposed design. It not only moves the higher order TM121 mode upwards to enhance the gain of the antenna, but also enables the higher order TM321 mode to be excited and combined with TM121 mode to expand the bandwidth. Their corresponding degenerate modes in the DPR are used to generate a dual-polarized operation. By using two identical pairs of differential feeding lines to excite the proposed DPR, several advantages such as high isolation and low cross polarization can be obtained. For demonstration, an antenna prototype centered at about 4.9 GHz is implemented and measured. The simulated and measured results are given, showing a good agreement.

中文翻译：

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基于高阶模式增益增强的差分馈电双极化介质贴片天线


这封信研究了在高阶 TM121 和 TM321 模式下工作的差分馈电增益增强双极化电介质贴片天线。在传统的方形介质贴片谐振器 (DPR) 中引入接地棒是所提出设计中的一项关键技术。不仅将高阶TM121模上移以增强天线的增益，还可以使高阶TM321模被激励并与TM121模结合以扩展带宽。它们在 DPR 中相应的简并模式用于生成双极化操作。通过使用两对相同的差分馈线来激励所提出的 DPR，可以获得高隔离度和低交叉极化等多个优点。为了进行演示，实施并测量了一个以 4.9 GHz 为中心频率的天线原型。给出了模拟和测量结果，显示出良好的一致性。