A planar array antenna consisting of 6 units of rectangular dielectric resonators fed by means of novel microstrip lines through aperture coupling is presented. The structure is designed in such a way that two different modes are excited in the array elements that yield a high bandwidth and gain. Based on the experimental results, the antenna is seen to have an impedance bandwidth of 6.98% centered at 24.09 GHz. Furthermore, the antenna gain is seen to lie between 7 and 9.5 dBi within its entire bandwidth, whereas the cross-polarization discrimination is better than 45 dB in the boresight. These features, along with its low-profile structure, make this antenna a suitable candidate for usage in short-range radars, wireless sensor nodes, and other sensors for the 24 GHz Industrial, Scientific, and Medical (ISM) band.

中文翻译：

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用于 24 GHz ISM 频段应用的矩形 DRA 阵列

提出了一种平面阵列天线，它由 6 个矩形介质谐振器单元组成，由新型微带线通过孔径耦合馈电。该结构的设计方式是在阵列元件中激发两种不同的模式，从而产生高带宽和增益。根据实验结果，可以看出天线的阻抗带宽为 6.98%，以 24.09 GHz 为中心。此外，可以看到天线增益在其整个带宽内介于 7 到 9.5 dBi 之间，而交叉极化鉴别在视轴中优于 45 dB。这些特性以及其低调的结构使该天线成为适用于 24 GHz 工业、科学和医疗 (ISM) 频段的短程雷达、无线传感器节点和其他传感器的合适候选者。