Optimal Performance of Advanced Radiating Structures
Author
Summary, in English
In this thesis a method for constructing physical bounds for general MIMO antennas is presented. By idealizing the channel and representing the antenna by the equivalent currents excited across it, a bound can be calculated with convex current optimization. It is shown that that bound is effectively reached by exciting different sets of modes depending on what constraints are put on the optimization. Different shapes and sub-regions are analyzed using the strength of these modes.
A new method for calculating stored energy and Q-factor in the presence of complex media is presented and investigated. By viewing the antenna as a dynamic system the method of moments (MoM) impedance equation can be formulated as a state space model. The energy stored within in such a model is identified as the stored energy. This method can be generalized to dispersive and inhomogeneous media.
Publishing year
2019-04-29
Language
English
Full text
Document type
Dissertation
Publisher
Electromagnetic Theory Department of Electrical and Information Technology Lund University Sweden
Topic
- Other Electrical Engineering, Electronic Engineering, Information Engineering
Keywords
- Physical Bounds
- MIMO Communication
- Computational Electromagnetics
- Antenna Theory
- Optimization Methods
- Q-factor
Status
Published
Project
- Optimal Performance of Advanced Radiating Structures
Research group
- Electromagnetic Theory
Supervisor
- Mats Gustafsson
- Daniel Sjöberg
- Sven Nordebo
ISBN/ISSN/Other
- ISBN: 978-91-7895-118-5
- ISBN: 978-91-7895-117-8
Defence date
24 May 2019
Defence time
09:15
Defence place
Lecture Hall E:1406, E-Building, Ole Römers väg 3, Lund University, Faculty of Engineering LTH
Opponent
- Marco Donald Migliore (Professor)