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Verification of 3D-printed quasi-optical lenses for 60GHz radar applications
Halmstad University, School of Information Technology.
Halmstad University, School of Information Technology.
2018 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

With the recent rise of 3D-printing as a form of manufacturing and their advantages for quick prototyping there is an interest for 3D-printed optical components. This thesis tests how well 3D-printed quasi-optical components preform and verify measurements with electromagnetic simulations. Measurements were made using a 60GHz FM-CW radar as well with a trihedral reflector, and tested on 3D-printed PLA lenses printed using an Ultimaker 2+. The measurements made are of the refractive index of the material, as well as the focal length of the lenses. Results showed PLA having a refractive index close to n = 1.654 in the 60GHz region. Results also showed the lenses having consistent properties like focal length and gain, two lenses having focal length of 23.7 and 23.9 mm which are close to the simulation of 24.05 mm. These findings shows 3D printed quasi-optical components have sufficient performance for use of prototyping or production depending on use. There are also some questions that have arisen like how does crystallisation in the plastic affect the components properties? And how does the PLA degrading affect the quality of the lenses over time?

Abstract [sv]

På grund av framgångar inom 3D-utskrivning på senaste tiden som en form av tillverkning och dess fördelar med snabb framtagande av prototyper finns det ett intresse för utskrivna optiska komponenter. Detta examensarbete testar hur väl 3D-utskrivna kvasioptiska komponenter funger\-ar och verifierar testresultat med elektromagnetiska simuleringar. Mät\-ning\-arna gjordes med en FM-CW radar och en trihedral reflektor, och testade PLA linser utskrivna med en Ultimaker 2+. Mätningar\-na gjordes på materialets brytningsindex samt linsernas brännvidd. Resultaten visade att PLA har ett brytningsindex nära n = 1.654 i 60GHz området. Resultaten visade även hur linserna har konsekventa egenskaper som brännvidd och förstärkning. De två slutgiltiga linserna hade en brännvidd på 23.7 and 23.9 mm vilket är nära simuleringen på 24.05 mm. Dessa resultat visar att 3D-utskrivna komponenter har tillräcklig prestanda för användning i framtagande av prototyper eller produktion beroende på användning. Det finns en del frågor som kommit till, som hur påverkar plastens kristallisation komponentens egenskaper? Och hur påverkar PLAs nedbrytande linsernas kvalité?

Place, publisher, year, edition, pages
2018. , p. 29
Keywords [en]
60GHz Radar Quasi-optics 3D-Printing 3D-Printed PLA Lenses Verification Electromagnetic Simulation Refractive Index
Keywords [sv]
60GHz Radar Kvasioptisk 3D-Utskrivning 3D-Utskrivna PLA Linser Verifiering Elektromagnetiska Simulering Brytningsindex
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:hh:diva-37093OAI: oai:DiVA.org:hh-37093DiVA, id: diva2:1219335
External cooperation
Swedish Adrenaline
Subject / course
Electrical Engineering; Computer science and engineering
Educational program
Electrical Engineer, 180 credits; Computer Science and Engineering, 300 credits
Supervisors
Examiners
Available from: 2018-06-21 Created: 2018-06-15 Last updated: 2018-06-21Bibliographically approved

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