Modelling of Coupled Multi-antenna Scattering Systems
Loading...
URL
Journal Title
Journal ISSN
Volume Title
Sähkötekniikan korkeakoulu |
Master's thesis
Unless otherwise stated, all rights belong to the author. You may download, display and print this publication for Your own personal use. Commercial use is prohibited.
Authors
Date
2023-03-20
Department
Major/Subject
Microwave Engineering
Mcode
ELEC3051
Degree programme
Master’s Programme in Electronics and Nanotechnology (TS2013)
Language
en
Pages
67
Series
Abstract
Antenna scattering systems are used to handle possible problems connected with wireless communication disturbance due to the changes in medium of the signal propagation. In addition to supporting existing communication channels, they may be also applied for the signal transformation, which gives new opportunities for the use of wireless networks, such as backscattering communication. To design a proper system, an efficient and general model of scattering systems is required. The aim of this thesis is to develop a model for systems of coupled multi-antenna scatterers. It should consider antenna termination with both static and time-varying types of loads. These conditions ensure wider possibilities during the analysis and optimization processes, because the model includes indicative parameters, the value of which may be designed. To achieve the target of the thesis, the literature review of existing standard techniques of scattering structures analysis from theoretical and practical point of view is done. Following the results, the S-parameters and polyharmonic distortion based model is proposed for the computation of scattering of antenna arrays containing multiple coupled antenna elements terminated with static and time-varying types of loads, which does not exist among the known models. As an example of a time-varying load, the switched load is chosen, and the analysis of its performance is proposed. Unlike many of current approaches working with general scatterers, model allows the variation of load values without repeating the computation of the antenna. The developed approach allows the use of different sources of input information related to the array configuration (theoretical, simulation-based and experimental) to achieve the result. Additionally, the model gives an opportunity to perform an analysis of the suitability of different antenna types for the role of a single antenna element of adjustable antenna-based scattering structure. The performance of the developed model is verified by simulations and shows practically identical to them results. It indicates the suitability of the model for the characterization of scattering antenna systems with different types of loads.Description
Supervisor
Viikari, VilleThesis advisor
Holopainen, JariKeywords
antenna scattering system, scattering, coupled antenna array, time-varying load, polyharmonic distortion modelling, bistatic RCS