A 16-element coplanar waveguide series fed hexagonal array antenna is proposed at millimeter-wave frequency range. In this paper, the analysis is initiated from a single-element hexagonal patch then extended to 1×2 array, 1×4 array, and 4×4 series fed hexagonal patch array antennas. The idea behind this design is to improve fractional bandwidth stage-wise with improved gain maintaining constant efficiency with all the structures. The 16-element array antenna is fabricated on Rogers RT Duriod 5880™ substrate with ɛr = 2.2 and 0.508 mm thickness. This array antenna exhibits low return loss at 28 GHz with a reflection coefficient value of −31.02 dB including almost 102% radiation efficiency and attained a maximum gain value of 8.98 dBi. The results are quite comparable with simulated 4×4 array antenna using the HFSS tool. The size of the proposed antenna is quite small which will be best suited for 5 G Femtobase stations to provide indoor communications at millimeter-wave frequencies.

提出了一种在毫米波频率范围内的 16 单元共面波导串联馈电六角阵列天线。在本文中，分析从单个六边形贴片开始，然后扩展到 1×2 阵列、1×4 阵列和 4×4 串联馈电六边形贴片阵列天线。这种设计背后的想法是通过提高增益逐级提高部分带宽，从而在所有结构中保持恒定的效率。16 单元阵列天线在 Rogers RT Duriod 5880 ™基板上制造，具有ɛ r= 2.2 和 0.508 毫米厚度。该阵列天线在 28 GHz 时具有低回波损耗，反射系数值为 -31.02 dB，辐射效率几乎为 102%，最大增益值为 8.98 dBi。结果与使用 HFSS 工具模拟的 4×4 阵列天线相当。提议的天线尺寸非常小，最适合 5 G 毫微微基站以提供毫米波频率的室内通信。