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On directivity constraints and their influence on the lower Q-factor bound for embedded small antennas
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.ORCID iD: 0000-0001-7269-5241
2017 (English)In: Proceedings of the 2017 19th International Conference on Electromagnetics in Advanced Applications, ICEAA 2017, Institute of Electrical and Electronics Engineers (IEEE), 2017, p. 1770-1773Conference paper, Published paper (Refereed)
Abstract [en]

Constraints on the directivity reduce the available bandwidth of antennas. We develop here a formulation that determines the smallest Q-factor for an arbitrary shaped embedded antenna for a given partial or total directivity. An embedded antenna is an antenna that is located within a device often as part of a circuit board, where the main volume of the device is dedicated to non-antenna functions. We show that semi-definite relaxation can be used to predict the lowest Q-factor in an embedded antenna for a partial or a total directivity in a given direction, and that the bound is tight. The paper ends with an example.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2017. p. 1770-1773
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-224745DOI: 10.1109/ICEAA.2017.8065639ISI: 000426455500367Scopus ID: 2-s2.0-85035100951ISBN: 9781509044511 (print)OAI: oai:DiVA.org:kth-224745DiVA, id: diva2:1192644
Conference
19th International Conference on Electromagnetics in Advanced Applications, ICEAA 2017, Verona, Italy, 11 September 2017 through 15 September 2017
Note

QC 20180323

Available from: 2018-03-23 Created: 2018-03-23 Last updated: 2018-03-23Bibliographically approved

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