A Wideband and Low-Profile Discrete Dielectric Lens Using 3-D Printing Technology
A Wideband and Low-Profile Discrete Dielectric Lens Using 3-D Printing Technology
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DOI：
10.1109/tap.2018.2862358
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发表时间：
2018-08
影响因子：
5.7
通讯作者：
Chong Fan;Wanchen Yang;W. Che;Shanhong He;Q. Xue
中科院分区：
文献类型：
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作者：
Chong Fan;Wanchen Yang;W. Che;Shanhong He;Q. Xue
提出了一种新型的宽带低剖面分立介质透镜天线。所提出的四棱锥结构的双折射单胞可以在空气-介质界面实现宽带双折射。通过增加相位补偿范围，可以得到增益带宽很大但厚度很厚的微带天线。基于大增益带宽技术，提出了一种新型的多折透镜结构，在适当使用偏振栅网的同时，提出了一种宽带偏振旋转反射面，实现了低剖面设计。最后，提出的多折叠微带天线可以实现非常大的增益带宽，而微带单元和总天线的厚度可以大大减少。为了演示，建议的多折叠微带天线的制造和测量。该制造是通过使用简单且低成本的3D打印技术实现的。结果表明，该透镜天线的1dB增益下降带宽为43%，厚度小于1/3焦径比，最大孔径效率为32%.测量和模拟之间可以观察到良好的一致性。
In this paper, a novel wideband and low-profile discrete dielectric lens (DDL) antenna is presented. The proposed unit cells of DDL with the square-pyramid structure can realize wideband antireflection at an air–dielectric interface. By increasing the phase compensation range, the DDL antenna with very large gain bandwidth but large DDL thickness would be achieved. Furthermore, based on the large gain bandwidth technology, a novel multifolded lens structure is proposed to realize the low-profile design, in which a broadband polarization rotation reflection surface is proposed, while a polarized grid is used appropriately. Finally, the proposed multifolded DDL antenna can achieve a very large gain bandwidth, while the thicknesses of the DDL unit cell and the total antenna can be greatly reduced. For demonstration, the proposed multifolded DDL antenna is fabricated and measured. The fabrication was implemented by using a simple and low-cost 3-D printing technology. The results show that the proposed lens antenna can realize a 1 dB gain drop bandwidth of 43%, thickness of less than 1/3 focal-length-to-diameter ratio, and maximum aperture efficiency of 32%. Good agreement can be observed between the measurement and simulation.