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On Q-factor Bounds for Lossy Embedded Antennas in Electrically Small Devices
KTH, Skolan för elektroteknik och datavetenskap (EECS), Elektroteknisk teori och konstruktion.ORCID-id: 0000-0001-7269-5241
Univ Cote Azur, CNRS, LEAT, Sophia Antipolis, France..
2019 (engelsk)Inngår i: 13th European Conference on Antennas and Propagation, EuCAP 2019, IEEE, 2019, artikkel-id 8739833Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

In this paper we investigate a method to determine the best available bandwidth for small embedded antennas. The available bandwidth depend both on the size and the position within a device, but also on the ohmic losses in the structure. Here we use that solutions to a non-convex optimization problem to predict the available bandwidth for a range of surface resistances. The optimization problem utilizes stored energies, and it is phrased as a current optimization problem. We illustrate the method by comparing the results with embedded antennas in a small IoT terminal. We show that an optimized embedded come rather close to the bounds.

sted, utgiver, år, opplag, sider
IEEE, 2019. artikkel-id 8739833
Serie
Proceedings of the European Conference on Antennas and Propagation, ISSN 2164-3342
Emneord [en]
antenna, efficiency, Q-factor, constrained optimization
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-257477ISI: 000480384701160Scopus ID: 2-s2.0-85068483471ISBN: 978-8-8907-0188-7 (tryckt)OAI: oai:DiVA.org:kth-257477DiVA, id: diva2:1348456
Konferanse
13th European Conference on Antennas and Propagation (EuCAP), MAR 31-APR 05, 2019, Krakow, Poland
Merknad

QC 20190904

Tilgjengelig fra: 2019-09-04 Laget: 2019-09-04 Sist oppdatert: 2019-09-04bibliografisk kontrollert

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Jonsson, B. Lars G.

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