Feasibility Evaluations of Three-Dimensional-Printed High-Gain Reflectarray Antenna for W-Band Applications
Feasibility Evaluations of Three-Dimensional-Printed High-Gain Reflectarray Antenna for W-Band Applications
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W 波段应用的三维印刷高增益反射阵列天线的可行性评估
DOI：
10.1587/comex.2018xbl0038
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
N. Yonemoto
中科院分区：
文献类型：
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作者：
S. Futatsumori;K. Morioka;A. Kohmura;Nobuhiro Sakamoto;T. Soga;N. Yonemoto
评估结果表明，W波段毫米波雷达应用高增益、低制造成本的反射阵列天线是可行的。这种反射阵列天线具有简单、可拆卸结构的优点，并且可以通过三维（3D）打印以低成本制造。本文描述了3D打印反射阵天线的制作，其在W频段的增益超过30 dBi。首先，利用时域有限差分法（FDTD）分析了不同厚度介质板的反射信号相位，得到了反射阵列设计的特点。在此基础上，分析并制作了一个八区菲涅耳反射阵列，每个区之间相差45°。FDTD分析的结果表明，在78.5 GHz的天线增益为31.6 dBi。最后，使用3D打印机制造所设计的再现阵列。测量结果表明，实现的30.4 dBi天线增益几乎等于FDTD分析值31.6 dBi在78.5 GHz。
: An evaluation reveals the feasibility of a high-gain and low-fabrication-cost re fl ectarray antenna for W-band millimeter-wave radar applications. This re fl ectarray antenna o ff ers the advantage of a simple, fl at structure, and can be fabricated at low cost by three-dimensional (3D) printing. This paper describes the fabrication of a 3D-printed re fl ectarray antenna, whose gain is more than 30 dBi in the W-band. Firstly, the re fl ection-signal phases of dielectric plates of di ff erent thicknesses are evaluated using fi nite-di ff erence time-domain (FDTD) analysis to obtain the characteristics of the re fl ectarray design. Then, an eight-zone Fresnel re fl ectarray, in which a phase di ff erence of 45° separated each zone, is analyzed and fabricated. The results of the FDTD analysis shows a 31.6 dBi antenna gain at 78.5 GHz. Finally, the designed re fl ectarray is fabricated using a 3D printer. Measurements indicate that the achieved 30.4 dBi antenna gain nearly equaled the FDTD analysis value of 31.6 dBi at 78.5 GHz.