Computational microwave imaging using 3D printed conductive polymer frequency-diverse metasurface antennas
Computational microwave imaging using 3D printed conductive polymer frequency-diverse metasurface antennas
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DOI：
10.1049/iet-map.2017.0104
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发表时间：
2017-04
影响因子：
1.7
通讯作者：
O. Yurduseven;P. Flowers;Shengrong Ye;D. Marks;J. Gollub;T. Fromenteze;B. Wiley;David R. Smith
中科院分区：
文献类型：
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作者：
O. Yurduseven;P. Flowers;Shengrong Ye;D. Marks;J. Gollub;T. Fromenteze;B. Wiley;David R. Smith
展示了使用三维（3D）打印的频率多样的超表面天线合成的频率多样的计算成像系统。天线的3D制造是使用聚乳酸（PLA）聚合物材料和导电聚合物材料（Electrifi）的组合来实现的，从而避免了对昂贵且耗时的传统制造技术的要求，例如机械铣削、光刻和激光蚀刻。使用3D打印的频率多样化超表面天线，设计并模拟了复合孔径，用于在K波段频率范围（17.5-26.5 GHz）中成像。频率分集系统能够以全电子方式通过简单的频率扫描成像，避免了机械扫描和有源电路组件。利用该合成系统，在衍射极限下实现了目标的微波成像。研究还表明，Electrifi聚合物材料的导电性显著影响3D打印天线的性能，因此是控制重建图像保真度的关键因素。
A frequency-diverse computational imaging system synthesised using three-dimensional (3D) printed frequency-diverse metasurface antennas is demonstrated. The 3D fabrication of the antennas is achieved using a combination of polylactic acid (PLA) polymer material and conductive polymer material (Electrifi), circumventing the requirement for expensive and time-consuming conventional fabrication techniques, such as machine milling, photolithography, and laser-etching. Using the 3D printed frequency-diverse metasurface antennas, a composite aperture is designed and simulated for imaging in the K-band frequency regime (17.5-26.5 GHz). The frequency-diverse system is capable of imaging by means of a simple frequency-sweep in an all-electronic manner, avoiding mechanical scanning and active circuit components. Using the synthesised system, microwave imaging of objects is achieved at the diffraction limit. It is also demonstrated that the conductivity of the Electrifi polymer material significantly affects the performance of the 3D printed antennas and therefore is a critical factor governing the fidelity of the reconstructed images.