Moment Method Analysis of Antennas in Reverberation Chambers and Cylindrical Structures
Doktorsavhandling, 2006

This thesis is a collection of papers using the method of moments for numerical analysis. The papers can be divided into two main groups; a study of antennas in reverberation chambers and a study of antennas in cylindrical structures. The reverberation chamber is a metal cavity for measuring antennas and other devices. A numerical model of the reverberation chamber is developed to be able to better understand the field environment in the chamber and improve the performance of the chamber. The effect of lossy objects in the reverberation chamber is studied by calculating the mean absorption cross section of lossy objects and comparing it to measurements in a reverberation chamber. The possibility to extract electrical parameters of dielectric objects by measuring the mean absorption cross section is shown. The second part of the thesis deals with cylindrical structures. Many waveguide and antenna structures can be assumed to be infinitely long in one of the coordinates. It is then possible to efficiently solve a spectrum of two-dimensional problems rather than to solve the complete three-dimensional problem. The present thesis shows solutions for modes in waveguides with various electromagnetic band-gap surfaces. Also it is shown how the field solutions for cylindrical structures can be interpolated over the spectral domain with the asymptotic waveform evaluation technique. There is also one paper analyzing a high-Q resonator on dielectric substrate by solving the one-dimensional numerical Green's function for multi-layer planar structures.

antenna

spectral domain method

reverberation chamber

Ewald summation

moment method

cavity

cylindrical structure

Green's function

absorption cross section

10.00 HA2, Hörsalsvägen 4, Chalmers
Opponent: Dr. Christopher L. Holloway, National Institute of Standards and Technology (NIST), CO, USA

Författare

Ulf Carlberg

Chalmers, Signaler och system, Kommunikationssystem, informationsteori och antenner, Antennsystem

Extracting electrical material parameters of electrically large dielectric objects from reverberation chamber measurements of absorption cross section

IEEE Transactions on Electromagnetic Compatibility,; Vol. 47(2005)p. 291-303

Artikel i vetenskaplig tidskrift

Numerical modelling of reverberation chamber using method of moments and Ewald summation

IEEE AP-S International Symposium Washington D.C., 3-8 July 2005,; Vol. 1B(2005)p. 344-347

Konferensbidrag (offentliggjort, men ej förlagsutgivet)

Study of antennas in reverberation chamber using method of moments with cavity Green’s function calculated by Ewald summation

IEEE Transactions on Electromagnetic Compatibility,; Vol. 47(2005)p. 805-814

Artikel i vetenskaplig tidskrift

A Fast Mode Analysis for Waveguides of Arbitrary Cross Section With Multiple Regions by Using a Spectrum of Two-Dimensional Solutions and Asymptotic Waveform Evaluation

IEEE Transactions on Microwave Theory and Techniques,; Vol. 52(2004)p. 1615-1621

Artikel i vetenskaplig tidskrift

Efficient computation of high Q resonator realized by thin film multilayer metal/dielectric structure

Microwave Optical and Technology Letters,; Vol. 44(2005)p. 48-51

Artikel i vetenskaplig tidskrift

Calculated and measured absorption cross sections of lossy objects in reverberation chamber

IEEE Transactions on Electromagnetic Compatibility,; Vol. 46(2004)p. 146-154

Artikel i vetenskaplig tidskrift

Ämneskategorier

Annan elektroteknik och elektronik

ISBN

91-7291-848-9

Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie: 2530

10.00 HA2, Hörsalsvägen 4, Chalmers

Opponent: Dr. Christopher L. Holloway, National Institute of Standards and Technology (NIST), CO, USA