A 3-D luneburg lens antenna fabricated by polymer jetting rapid prototyping


Journal Article

In this work, we designed, built, and tested a low-gain 20 dBi Luneburg Lens antenna using a rapid prototyping machine as a proof of concept demonstrator. The required continuously varying relative permittivity profile was implemented by changing the size of plastic blocks centered on the junctions of a plastic rod space frame. A 12-cm (4λ0 at at 10 GHz) diameter lens is designed to work at X-band. The effective permittivity of the unit cell is calculated by effective medium theory and simulated by full-wave finite-element simulations. The fabrication is implemented by a polymer jetting rapid prototyping method. In the measurement, the lens antenna is fed by an X-band waveguide. The measured gain of the antenna at X-band is from 17.3 to 20.3 dB. The measured half-power beam width is from 19° to 12.7° while the side lobes are about 25 dB below the main peak. Good agreement between simulation and experimental results is obtained. © 1963-2012 IEEE.

Full Text

Duke Authors

Cited Authors

  • Liang, M; Ng, WR; Chang, K; Gbele, K; Gehm, ME; Xin, H

Published Date

  • January 1, 2014

Published In

Volume / Issue

  • 62 / 4

Start / End Page

  • 1799 - 1807

International Standard Serial Number (ISSN)

  • 0018-926X

Digital Object Identifier (DOI)

  • 10.1109/TAP.2013.2297165

Citation Source

  • Scopus