dc.contributor.advisor |
Neve, M |
en |
dc.contributor.advisor |
Stringer, J |
en |
dc.contributor.author |
Mittal, Priya |
en |
dc.date.accessioned |
2018-11-16T02:26:59Z |
en |
dc.date.issued |
2018 |
en |
dc.identifier.uri |
http://hdl.handle.net/2292/44351 |
en |
dc.description |
Full Text is available to authenticated members of The University of Auckland only. |
en |
dc.description.abstract |
Microwave devices are traditionally manufactured using conventional machining methods, such as lathing and milling, leading to wastage of material and the need for skilled machinists and specialised machinery. In contrast, three-dimensional (3D) printing is an additive manufacturing process that provides layer-by-layer deposition to produce a part. Due to the additive nature of this fabrication process, it allows the realisation of geometrically complex parts that would otherwise be difficult or unachievable to fabricate using conventional machining. The use of additive manufacturing for the fabrication of three microwave devices is investigated in this thesis: a waveguide short (Phase 1), a straight waveguide section (Phase 2) and a coax-to-waveguide adapter (Phase 3). The effects of printing and metallisation technologies were used to make design decisions for the manufacture of devices in each phase, with multiple test cases of each device fabricated. Devices were printed in plastic polymers and conductive material, and assessed for their suitability. The non-conductive materials were metallised using conductive paints, physical vapour deposition and electroplated coatings. Use of conductive paints for metallisation of critical surfaces provided acceptable indicative performance for printed devices. Performance of electroplated devices is shown to provide good agreement with benchmark standards for the simple devices discussed in Phases 1 and 2, however, high variability in return and insertion losses were seen when used for metallisation of a coax-to-waveguide adapter in Phase 3. Waveguide shorts and waveguides printed in titanium are shown to perform with very good agreement to benchmark standards, despite the inherent surface roughness associated with this printing technology. The use of 3D printing offers an accessible prototyping method to determine indicative performance of designs, which can be used to refine the design of more expensive, machined parts. The use of additive manufacturing provides promise for the manufacture of microwave devices with increased geometric complexity, while shortening lead times and reducing costs. |
en |
dc.publisher |
ResearchSpace@Auckland |
en |
dc.relation.ispartof |
Masters Thesis - University of Auckland |
en |
dc.relation.isreferencedby |
UoA99265123708802091 |
en |
dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. |
en |
dc.rights |
Restricted Item. Full Text is available to authenticated members of The University of Auckland only. |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
en |
dc.rights.uri |
http://creativecommons.org/licenses/by-nc-nd/3.0/nz/ |
en |
dc.title |
Fabrication of Passive Microwave Devices Using Additive Manufacturing |
en |
dc.type |
Thesis |
en |
thesis.degree.discipline |
Electrical and Electronics Engineering |
en |
thesis.degree.grantor |
The University of Auckland |
en |
thesis.degree.level |
Masters |
en |
dc.rights.holder |
Copyright: The author |
en |
pubs.elements-id |
756448 |
en |
pubs.record-created-at-source-date |
2018-11-16 |
en |
dc.identifier.wikidata |
Q112937563 |
|