2.1 Oct 1991 - May 1994: PhD in Electrical Engineering and Electronics -
Place: UMIST (now University of Manchester), Department of Electrical Engineering and Electronics (Manchester, UK)
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Academic Supervisor: Professor L E Davis
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Thesis (in microwave engineering): “Analysis and Design of Lossy Chirals and Biisotropics"
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Summary: In this thesis work, biisotropic and lossy chiral media were studied. Their various constitutive formalisms were intercompared and unified into a new formalism-independent characterization. The scattering by chiral particles and effects of loss and biisotropy on absorption and reflection were analyzed. An original model for the chiral admittance of multi-turn helices was developed and published, showing good agreement with experimental values.
Novel concepts of multi-dimensional chirality and semi-chirality were introduced and published, leading to a new wave of research activity on planar chiral structures in optics (cf J. Optics A, Special Issue, 2009).
An 8-port polarimetric waveguide junction for measuring chiral media was invented, designed, analysed, built and patented.
2.2 Oct 1990 - Sep 1991: MSc in Communication Engineering and Digital Electronics -
Place: UMIST (now University of Manchester), Department of Electrical Engineering and Electronics (Manchester, UK)
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Dissertation Supervisor: Professor L E Davis
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Examination courses: various (microwave engineering, optical waveguides, analogue and digital communications, coding, programming, speech encoding, filtering, etc.)
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Dissertation (in microwave engineering): "Non-reciprocal Effects in Transversally Magnetized Lossless Semiconductor Plasmas in a Lossy Parallel-Plate Structure"
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Summary: In this dissertation work, I investigated the propagation of TM waves in a parallel-plate waveguide, consisting of one perfectly conducting plate and one lossy plate, filled with a lossless, transversely magnetized semiconductor. By solving a set of transcendental equations based on the free electron model of semiconductor plasmas, it was examined how the tunable difference between the complex constants of forward and backward propagation for opposite magnetizations can be used to exploit, control and optimize the design of a millimeter-wave isolator based on a magnetized InSb plasma. Isolation of about 35 dB at 50.9 GHz was shown to be feasible.
2.3 Oct 1984 - Sep 1989: Masters Degree in Electrical Engineering Science and Applied Physics (“Burgerlijk Ingenieur Elektrotechniek”); Major: Communications theory & techniques -
Place: State University of Ghent, Faculty of Applied Sciences, Laboratory for Communication Techniques and Transmission of Information (Ghent, Belgium)
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Academic Promotor: Prof. Dr. Ir. I. Bruyland
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Thesis (on digital image processing and coding): “Gemengde Discrete Cosine Transform / Conditional Replenishment Kodering van Beeldsekwenties” (Mixed Discrete Cosine Transform / Conditional Replenishment Coding of Image Sequences)”
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Summary: In the final-year project work, a method for image compression was developed for videophone applications. The correlation between consecutive frames of an image sequence is stored as bitmaps, based on chosen thresholds of the luminance. The two-dimensional DCT was performed per frame and filtered before transmission. The DCT/CR scheme was applied on several standard image sequences, and the signal-to-noise ratio of the reconstructed sequence was computed. Transmission rates as low as two bits per pixel were found to be achievable and leading to acceptable quality of the reconstructed sequence. However, image quality was found to dramatically decrease for sequence lengths in excess of typically ten frames.
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Specialist courses: 2-year module on in-depth study of applied mathematics for physics and engineering; 3-year module on specialist courses including electromagnetism & optics, semiconductors, avionics & satellites, statistical communication theory, control theory, power engineering, etc. (complete list available on request).
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