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Fabrication and evaluation of solid freeformed electromagnetic bandgap structures

Fabrication and evaluation of solid freeformed electromagnetic bandgap structures
Fabrication and evaluation of solid freeformed electromagnetic bandgap structures
Microwave electromagnetic bandgap (EBG) structures have potential applications in improving the radiating features of antennas and the transmission properties of waveguides. Extrusion freeforming is a rapid prototyping technique for assembling ceramic dielectric lattice structures directly from a computer design file. It is without heating, cooling or polymerization processes to contend with at the construction stage. Various limitations on overall build thickness prompted us to explore lamination by welding to produce larger three-dimensional quasi-crystals. Microwave transmission through normal and side incidence showed that the bandgap frequency was in the 90–110 GHz region in all directions, matching the design that was informed by computer modelling. In order to image the EBG internal crystal structure, micro-computed tomography was used for scanning and reconstruction. Finally, the effect of structural defects including roundness and sagging of filaments and deviation of inter-filament spacing caused by fabrication errors on bandgap frequency was investigated.
0022-3727
145107
Lu, Xuesong
e3eb4386-7dc9-417e-bd5c-bbdec78f7ec5
Lee, Yoonjae
07298a68-0ff0-4a07-a4de-c4f5a6e0cd64
Yang, Shoufeng
e0018adf-8123-4a54-b8dd-306c10ca48f1
Hao, Yang
8450eaa4-843c-4b86-b951-b413942d4453
Evans, Julian R.G.
4eee463a-4dd3-4ef2-b9bc-784246b68ad2
Parini, Clive G.
9c0d66e3-70c9-4cb9-bbb3-34bee8e0e420
Lu, Xuesong
e3eb4386-7dc9-417e-bd5c-bbdec78f7ec5
Lee, Yoonjae
07298a68-0ff0-4a07-a4de-c4f5a6e0cd64
Yang, Shoufeng
e0018adf-8123-4a54-b8dd-306c10ca48f1
Hao, Yang
8450eaa4-843c-4b86-b951-b413942d4453
Evans, Julian R.G.
4eee463a-4dd3-4ef2-b9bc-784246b68ad2
Parini, Clive G.
9c0d66e3-70c9-4cb9-bbb3-34bee8e0e420

Lu, Xuesong, Lee, Yoonjae, Yang, Shoufeng, Hao, Yang, Evans, Julian R.G. and Parini, Clive G. (2009) Fabrication and evaluation of solid freeformed electromagnetic bandgap structures. Journal of Physics D: Applied Physics, 42 (14), 145107. (doi:10.1088/0022-3727/42/14/145107).

Record type: Article

Abstract

Microwave electromagnetic bandgap (EBG) structures have potential applications in improving the radiating features of antennas and the transmission properties of waveguides. Extrusion freeforming is a rapid prototyping technique for assembling ceramic dielectric lattice structures directly from a computer design file. It is without heating, cooling or polymerization processes to contend with at the construction stage. Various limitations on overall build thickness prompted us to explore lamination by welding to produce larger three-dimensional quasi-crystals. Microwave transmission through normal and side incidence showed that the bandgap frequency was in the 90–110 GHz region in all directions, matching the design that was informed by computer modelling. In order to image the EBG internal crystal structure, micro-computed tomography was used for scanning and reconstruction. Finally, the effect of structural defects including roundness and sagging of filaments and deviation of inter-filament spacing caused by fabrication errors on bandgap frequency was investigated.

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More information

Published date: July 2009
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 165007
URI: https://eprints.soton.ac.uk/id/eprint/165007
ISSN: 0022-3727
PURE UUID: 0fe68630-3256-4eea-97b3-b1943c1c8ba1
ORCID for Shoufeng Yang: ORCID iD orcid.org/0000-0002-3888-3211

Catalogue record

Date deposited: 07 Oct 2010 11:42
Last modified: 06 Jun 2018 12:33

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Contributors

Author: Xuesong Lu
Author: Yoonjae Lee
Author: Shoufeng Yang ORCID iD
Author: Yang Hao
Author: Julian R.G. Evans
Author: Clive G. Parini

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