Integral Identities for Passive Systems and Spherical Waves in Scattering and Antenna Problems
Author
Summary, in English
The results of this thesis can roughly be divided into three categories: Firstly, a general approach to derive sum rules and physical limitations on input-output systems based on the assumptions of causality and passivity is presented (Paper I). Secondly, sum rules and physical limitations on the scattering and matching of electromagnetic spherical waves are derived, and the implications for antennas are explored (Papers II-IV). Thirdly, a method to estimate spherical wave coefficients from channel measurements, and the results of a measurement campaign, are presented and analysed (Paper V).
The thesis consists of a General Introduction and five appended papers.
Publishing year
2012
Language
English
Publication/Series
Series of licentiate and doctoral theses
Volume
40
Full text
Document type
Dissertation
Publisher
Department of Electrical and Information Technology, Lund University
Topic
- Electrical Engineering, Electronic Engineering, Information Engineering
Keywords
- dispersion relations
- sum rules
- physical limitations
- Herglotz functions
- electromagnetic scattering
- antenna theory
- spherical wave expansions
- antenna measurements
- propagation channel measurements
Status
Published
Project
- EIT_HSWC:Antenna MIMO antennas and channels
Research group
- Electromagnetic theory
Supervisor
ISBN/ISSN/Other
- ISSN: 1654-790X
- ISBN: 978-91-7473-302-0
Defence date
23 May 2012
Defence time
10:15
Defence place
Lecture hall E:1406, E-building, John Ericssons väg 4, Lund University Faculty of Engineering
Opponent
- Johannes Skaar (Professor)