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Quality factor for lossy and lossless antennas
Electromagnetics Research Consultant, Concord, MA, USA.
Lund University, Sweden.
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.ORCID iD: 0000-0001-7269-5241
2014 (English)In: 8th European Conference on Antennas and Propagation, EuCAP 2014, IEEE , 2014, 3123-3127 p.Conference paper, Published paper (Refereed)
Abstract [en]

Lower-bound formulas for the Q of electrically small antennas in an arbitrarily shaped volume are derived for combined electric and magnetic dipole moments excited by both electric and magnetic surface currents as well as by electric surface currents alone. With either excitation, separate formulas are found for the dipole antennas containing only lossless (or ’nondispersive-conductivity’) material and ’highly dispersive lossy’ material. The formulas involve the quasi-static electric and magnetic polarizabilities of the associated perfectly conducting volume of the antenna, the ratio of the powers radiated by the electric and magnetic dipoles, and the efficiency of the antenna.

Place, publisher, year, edition, pages
IEEE , 2014. 3123-3127 p.
Keyword [en]
Dipole antennas, Power inductors, Dipoles, Electrically small antennas
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-168528DOI: 10.1109/EuCAP.2014.6902489ISI: 000361548803084Scopus ID: 2-s2.0-84908609082ISBN: 978-889070184-9 (print)OAI: oai:DiVA.org:kth-168528DiVA: diva2:818748
Conference
8th European Conference on Antennas and Propagation, EuCAP 2014; The Hague; Netherlands
Note

QC 20150609

Available from: 2015-06-09 Created: 2015-06-04 Last updated: 2016-04-13Bibliographically approved

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Jonsson, Lars

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