Optimal Performance of Advanced Radiating Structures
Författare
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.
Publiceringsår
2019-04-29
Språk
Engelska
Fulltext
Dokumenttyp
Doktorsavhandling
Förlag
Electromagnetic Theory Department of Electrical and Information Technology Lund University Sweden
Ämne
- Other Electrical Engineering, Electronic Engineering, Information Engineering
Nyckelord
- Physical Bounds
- MIMO Communication
- Computational Electromagnetics
- Antenna Theory
- Optimization Methods
- Q-factor
Status
Published
Projekt
- Optimal Performance of Advanced Radiating Structures
Forskningsgrupp
- Electromagnetic Theory
Handledare
- Mats Gustafsson
- Daniel Sjöberg
- Sven Nordebo
ISBN/ISSN/Övrigt
- ISBN: 978-91-7895-118-5
- ISBN: 978-91-7895-117-8
Försvarsdatum
24 maj 2019
Försvarstid
09:15
Försvarsplats
Lecture Hall E:1406, E-Building, Ole Römers väg 3, Lund University, Faculty of Engineering LTH
Opponent
- Marco Donald Migliore (Professor)