El-Nady Shaza, Elsharkawy Rania R, Afifi Asmaa I, Abd El-Hameed Anwer S
Electronics Research Institute, Microstrip Circuits Joseph Tito St, Huckstep, El Nozha, Cairo 11843, Egypt.
Sensors (Basel). 2021 Dec 25;22(1):125. doi: 10.3390/s22010125.
This paper exhibits a high-gain, low-profile dipole antenna array (DAA) for 5G applications. The dipole element has a semi-triangular shape to realize a simple input impedance regime. To reduce the overall antenna size, a substrate integrated cavity (SIC) is adopted as a power splitter feeding network. The transition between the SIC and the antenna element is achieved by a grounded coplanar waveguide (GCPW) to increase the degree of freedom of impedance matching. Epsilon-near-zero (ENZ) metamaterial technique is exploited for gain enhancement. The ENZ metamaterial unit cells of meander shape are placed in front of each dipole perpendicularly to guide the radiated power into the broadside direction. The prospective antenna has an overall size of 2.58 λg3 and operates from 28.5 GHz up to 30.5 GHz. The gain is improved by 5 dB compared to that of the antenna without ENZ unit cells, reaching 11 dBi at the center frequency of 29.5 GHz. Measured and simulated results show a reasonable agreement.
本文展示了一种用于5G应用的高增益、低剖面偶极子天线阵列（DAA）。偶极子单元采用半三角形形状以实现简单的输入阻抗状态。为减小天线整体尺寸，采用基板集成腔体（SIC）作为功率分配器馈电网络。SIC与天线单元之间的过渡通过接地共面波导（GCPW）实现，以增加阻抗匹配的自由度。利用近零介电常数（ENZ）超材料技术来提高增益。蜿蜒形状的ENZ超材料单元垂直放置在每个偶极子前方，将辐射功率引导至宽边方向。该预期天线的整体尺寸为2.58 λg3，工作频率范围为28.5 GHz至30.5 GHz。与没有ENZ单元的天线相比，增益提高了5 dB，在29.5 GHz的中心频率处达到11 dBi。测量结果与模拟结果显示出合理的一致性。
