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dc.contributor.authorLeisten, Oliver-
dc.contributor.authorFieret, Jim-
dc.contributor.authorStassen Böhlen, Ines-
dc.contributor.authorRumsby, Phil T.-
dc.contributor.authorMcEvoy, Patrick-
dc.contributor.authorVardaxoglou, Yiannis-
dc.date.accessioned2019-03-29T09:47:53Z-
dc.date.available2019-03-29T09:47:53Z-
dc.date.issued2002-
dc.identifier.issn0277-786Xde_CH
dc.identifier.urihttps://digitalcollection.zhaw.ch/handle/11475/16449-
dc.description.abstractThe use of ceramic cores of high dielectric constant is an essential part of a strategy to miniaturize GPS antennas for mobile telephones. The core reduces the guide wavelength of the conducting structures on the antenna, thereby creating a need for high-resolution imaging to maintain very accurate dimensions. It is for this principal reason that a novel laser imaging technology has been developed using a positive electrophoretic photoresist and UV excimer laser mask imaging to produce the conducting features on the surface of the antenna. Furthermore, a significant process challenge in producing this type of antenna concerns the reproducibility of the right-hand circular polarization performance and the bandwidth over which this can be achieved - which becomes progressively smaller as antenna size is reduce. It is therefore a vital requirement that the antennas have the point to be tuned by a laser trimming process at an automatic RF testing station. A galvanometer controlled Nd:YAG laser spot is used to trim the conductive pattern on the top of the antenna following an RF measurement to characterize the resonant frequencies of the four helical conductors. Results demonstrate the laser imaging and trimming techniques ensure a high-speed method of guaranteeing the antenna performance. The technique is appropriate for other antenna types such as GSM, Bluetooth and Wireless LAN.de_CH
dc.language.isoende_CH
dc.publisherInternational society for optical engineeringde_CH
dc.relation.ispartofProceedings / SPIEde_CH
dc.rightsLicence according to publishing contractde_CH
dc.subjectExcimer laserde_CH
dc.subjectNd:YAG laserde_CH
dc.subjectTrimmingde_CH
dc.subjectResist exposurede_CH
dc.subject.ddc621.3: Elektro-, Kommunikations-, Steuerungs- und Regelungstechnikde_CH
dc.titleLaser-assisted manufacture for performance-optimized dielectrically loaded GPS antennas for mobile telephonesde_CH
dc.typeKonferenz: Paperde_CH
dcterms.typeTextde_CH
zhaw.departementSchool of Engineeringde_CH
zhaw.organisationalunitInstitut für Angewandte Mathematik und Physik (IAMP)de_CH
dc.identifier.doi10.1117/12.470647de_CH
zhaw.conference.detailsHigh-Power Lasers and Applications, San Jose, United States, 20-25 January 2002de_CH
zhaw.funding.euNode_CH
zhaw.originated.zhawYesde_CH
zhaw.pages.end404de_CH
zhaw.pages.start397de_CH
zhaw.publication.statuspublishedVersionde_CH
zhaw.volume4637de_CH
zhaw.publication.reviewNot specifiedde_CH
zhaw.title.proceedingsPhoton Processing in Microelectronics and Photonicsde_CH
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Leisten, O., Fieret, J., Stassen Böhlen, I., Rumsby, P. T., McEvoy, P., & Vardaxoglou, Y. (2002). Laser-assisted manufacture for performance-optimized dielectrically loaded GPS antennas for mobile telephones [Conference paper]. Proceedings / SPIE, 4637, 397–404. https://doi.org/10.1117/12.470647
Leisten, O. et al. (2002) ‘Laser-assisted manufacture for performance-optimized dielectrically loaded GPS antennas for mobile telephones’, in Proceedings / SPIE. International society for optical engineering, pp. 397–404. Available at: https://doi.org/10.1117/12.470647.
O. Leisten, J. Fieret, I. Stassen Böhlen, P. T. Rumsby, P. McEvoy, and Y. Vardaxoglou, “Laser-assisted manufacture for performance-optimized dielectrically loaded GPS antennas for mobile telephones,” in Proceedings / SPIE, 2002, vol. 4637, pp. 397–404. doi: 10.1117/12.470647.
LEISTEN, Oliver, Jim FIERET, Ines STASSEN BÖHLEN, Phil T. RUMSBY, Patrick MCEVOY und Yiannis VARDAXOGLOU, 2002. Laser-assisted manufacture for performance-optimized dielectrically loaded GPS antennas for mobile telephones. In: Proceedings / SPIE. Conference paper. International society for optical engineering. 2002. S. 397–404
Leisten, Oliver, Jim Fieret, Ines Stassen Böhlen, Phil T. Rumsby, Patrick McEvoy, and Yiannis Vardaxoglou. 2002. “Laser-Assisted Manufacture for Performance-Optimized Dielectrically Loaded GPS Antennas for Mobile Telephones.” Conference paper. In Proceedings / SPIE, 4637:397–404. International society for optical engineering. https://doi.org/10.1117/12.470647.
Leisten, Oliver, et al. “Laser-Assisted Manufacture for Performance-Optimized Dielectrically Loaded GPS Antennas for Mobile Telephones.” Proceedings / SPIE, vol. 4637, International society for optical engineering, 2002, pp. 397–404, https://doi.org/10.1117/12.470647.


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