Realization of modified Luneburg lens antenna using quasi-conformal transformation optics and additive manufacturing

被引：29

作者：

Biswas, Soumitra ^{[1
]}

Lu, Aric ^{[1
]}

Larimore, Zachary ^{[1
]}

Parsons, Paul ^{[1
]}

Good, Austin ^{[1
]}

Hudak, Nicholas ^{[1
]}

Garrett, Benjamin ^{[1
]}

Suarez, John ^{[2
,3
]}

Mirotznik, Mark S. ^{[1
]}

机构：

[1] Univ Delaware, Dept Elect & Comp Engn, Newark, DE 19716 USA

[2] US Army Res, Dev, Aberdeen, MD USA

[3] US Army Res, Engn Command, Aberdeen, MD USA

来源：

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS | 2019年 / 61卷 / 04期

关键词：

additive manufacturing; beamforming; beamscanning; fused deposition modeling; Luneburg lens; transformation optics; DESIGN;

D O I：

10.1002/mop.31696

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We demonstrate a new method for realizing modified Luneburg lens antennas with nearly continuously graded permittivity profiles in three-dimensions. The method used a quasi-conformal transformation optics (QCTO) approach to modify the geometry and permittivity of a spherical Luneburg lens to have a flat surface for convenient integration of antenna feeds. The modified lens was then fabricated using Fused Deposition Modeling (FDM) printing with an effective media approach that employs space-filling curves. The method was validated by designing and fabricating a modified Luneburg lens antenna designed to operate in the Ka-band. The antenna performance of the sample was measured experimentally and shown to compare well to predicted results using full wave simulations. The device was able to achieve a reasonably high degree of beam steering (ie, -55 degrees to +55 degrees) over the entire Ka-band. We believe this new approach provides a cost-effective and scalable means of realizing practical passive beam steering lenses that operate over a broad range of frequencies.

引用

页码：1022 / 1029

页数：8

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