Journal ArticleDOI
A 3-D Luneburg Lens Antenna Fabricated by Polymer Jetting Rapid Prototyping
TLDR
In this article, a low-gain 20 dBi Luneburg lens antenna using a rapid prototyping machine as a proof-of-concept demonstrator was designed, built, and tested.Abstract:
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 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.read more
Citations
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Journal ArticleDOI
Multiprocess 3D printing for increasing component functionality.
Eric MacDonald,Ryan B. Wicker +1 more
TL;DR: Multiprocess 3D printing is a nascent area of research in which basic 3Dprinting is augmented to fabricate structures with multifunctionality, which will lead to local manufacturing with customized 3D spatial control of material, geometry, and placement of subcomponents.
Journal ArticleDOI
3-D Printed Metal-Pipe Rectangular Waveguides
Mario D'Auria,William J. Otter,Jonathan Hazell,Brendan T. W. Gillatt,Callum Long-Collins,Nick M. Ridler,Stepan Lucyszyn +6 more
TL;DR: In this paper, 3D printed air-filled metal-pipe rectangular waveguides (MPRWGs) and 3D printing for microwave and millimeter-wave applications are investigated in detail.
Journal ArticleDOI
Additive manufacturing of structural materials
Guo Liu,Xiaofeng Zhang,Xuliang Chen,Yunhu He,Lizi Cheng,Mengke Huo,Jianan Yin,Fengqian Hao,Siyao Chen,Peiyu Wang,Shenghui Yi,Lei Wan,Zhengyi Mao,Zhou Chen,Xu Wang,Zhaowenbo Cao,Jian Lu +16 more
TL;DR: In this article, a review of the additive manufacturing of structural materials is presented, including multi-material additive manufacturing (MMa-AM), multi-modulus AM (MMo-AM) and multi-scale AM (MSc-AM).
Journal ArticleDOI
Metallic 3-D Printed Antennas for Millimeter- and Submillimeter Wave Applications
TL;DR: In this paper, a 3D printed metallic horn antenna was used for antenna implementation up to 325 GHz. But the performance of the antenna was not evaluated. But they used binder jetting/sintering on 316L stainless steel and selective laser melting (SLM) on Cu-15Sn.
Journal ArticleDOI
Multibeam 3-D-Printed Luneburg Lens Fed by Magnetoelectric Dipole Antennas for Millimeter-Wave MIMO Applications
TL;DR: In this article, a 3D-printed Luneburg lens with a simplified geometry is presented, where rod-type structures are employed as the unit cell of the gradient-index material to realize the required permittivity distribution in the lens.
References
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BookDOI
Millimeter and Submillimeter Wave Spectroscopy of Solids
TL;DR: In this article, the authors proposed a waveguide configuration optical spectroscopy method for sub-millimeter wave spectra, which is based on the wave-guide configuration of the Volkov waveguide.
Journal ArticleDOI
A Printed, Broadband Luneburg Lens Antenna
Carl Pfeiffer,Anthony Grbic +1 more
TL;DR: In this paper, the design of a 2D broadband Luneburg lens antenna implemented using printed circuit board techniques is detailed, and the measured half power beamwidth of the experimental antenna is 4.34°.
Journal ArticleDOI
Nonuniform Luneburg and two-shell lens antennas: radiation characteristics and design optimization
TL;DR: In this paper, a GA with adaptive cost function is implemented to obtain the optimal design of a non-uniform Luneburg (1964) lens antenna, where the GA optimizer simultaneously determines the optimal material and its thickness for each shell by controlling the gain and sidelobes envelope of the radiation pattern.
Journal ArticleDOI
Broadband planar Luneburg lens based on complementary metamaterials
TL;DR: In this article, a two-dimensional broadband low-loss Luneburg lens has been designed based on the complementary metamaterials, and the experimental sample has been fabricated and tested in a near-field microwave scanning apparatus, where the experiment and simulation results agree very well.
Journal ArticleDOI
Design Optimization of Multishell Luneburg Lenses
TL;DR: Guidelines for designing multishell Luneburg lenses (LL) whatever the primary source is are provided in this article, where three different optimization problems that minimize three different norms of the discrepancy between the ideal relative permittivity and the reconstructed one with respect to the thickness and permittivities of each shell are detailed.