Annual Report 2006
Commission B (Fields and Waves)

Alan Robert Clark

2 May 2007

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1  Active S.A. Researchers and Research Groups

Research that falls under the Commission B ambit is mainly performed at the major universities, and in associated research companies.

1.1  University of Pretoria

The University of Pretoria has an extremely active (and large) research group, and this year has provided 4 journal publications, with a further 4 accepted for publication later.

Much work is done on microwave antenna design and computational electromagnetics.

Main contact details are Prof. Johan Joubert (jjoubert@postino.up.ac.za), Prof Wimpie Odendaal (wodendaa@postino.up.ac.za), Prof JAG Malherbe.

1.2  University of Stellenbosch

Stellenbosch also has an extremely active group, and this year has excelled itself with 11 journal publications and 14 conference proceedings.

Main contact details are Prof J Cloete(jhcloete@sun.ac.za), Prof David Davidson(davidson@sun.ac.za), Prof Howard Reader(hcreader@sun.ac.za), Prof. Keith Palmer(palmer@sun.ac.za), Prof Petrie Meyer (pmeyer@sun.ac.za).

1.3  University of the Witwatersrand, Johannesburg

The Computational Electromagnetics Research Group within the School of Electrical and Information Engineering consists of Prof A.R.Clark (a.clark@ee.wits.ac.za), and is mainly concerned with the improvement of the theory behind the simulation package SuperNEC.

At present, I have work based on printed antennas, a hybrid FEM/MoM implementation for dielectric patch antennas, and a microwave holography map of the HartRAO Radio Telescope.

One of my new MSc's has attended a Satellite Course at Stellenbosh University under the Sumbandilasat bursary scheme.

3 MSc's were produced in 2006.

Annual Reports of the group are compiled in September and are all to be found on the sitewww.ee.wits.ac.za/~em, or ytdp.ee.wits.ac.za/AnnualReport2006.html.

South African Publications in the field of Commission B—2006

[1]
J Joubert and J W Odendaal. Analysis and design of wide band reflector gratings in rectangular waveguide. IEEE Transactions on Plasma Science, 34(3):659–665, June 2006.

[2]
J A G Malherbe and J Joubert. Simplified analytical solution of current and radiation pattern for thin dipoles. Microwave and Optical Technology Letters, 48(8):1483–1485, August 2006.

[3]
G Mayhew-Ridgers, J W Odendaal, and J Joubert. Considerations for the efficient spectral evaluation of reaction integrals associated with separated domains. IEE Proceedings Microwaves, Antennas and Propagation, 153(5):469–474, October 2006.

[4]
AJ Palmer and DC Baker. A novel semi empirical model for the effective earth radius factor. IEEE Transactions on Broadcasting, 52(4):557–565, December 2006.

[5]
J P Jacobs, J Joubert, and J W Odendaal. Mutual admittance of slot antennas on conductor-backed two-layer substrates. In Mediterranean Microwave Symposium, Genoa, Italy, 19–21 September 2006.

[6]
K D Palmer and H C Reader. Electromagnetics in South Africa: Perspectives and recent achievements. In Invited Semi-Plenary Paper, Session 2IN1, EuCAP 2006, Nice, paper no. 430866, CD ISBN Number: 92-9092-9375, November 2006.

[7]
H C Reader and M D Janezic. Coaxial probe dielectric measurements: Practical dotting "i's" and crossing "t's". In 68th ARFTG Conference, Omni Interlocken Resort, Broomfield, Colorado, December 2006.

[8]
M M Botha and D B Davidson. Investigation of an explicit, residual-based, a posteriori error indicator for the adaptive finite element analysis of waveguide structures. Applied Computational Electromagnetics Society Journal, 21(1):63–71, 2006.

[9]
M M Botha and D B Davidson. Rigorous, auxiliary variable-based implementation of a second-order ABC for the vector FEM. IEEE Transactions on Antennas and Propagation, 54(11):3499–3504, 2006.

[10]
M M Botha and D B Davidson. The implicit, element residual method for a posteriori error estimation in FE-BI analysis. IEEE Transactions on Antennas and Propagation, 54(1):255–258, 2006.

[11]
M M Botha. Solving the volume integral equations of electromagnetic scattering. Journal of Computational Physics, 218:141–158, 2006.

[12]
R H Geschke, R Ferrari, D B Davidson, and P Meyer. The solution of waveguide scattering problems by application of an extended Huygens formulation. IEEE Transactions on Microwave Theory and Techniques, 54(10):3698–3705, 2006.

[13]
N Marais and D B Davidson. Numerical evaluation of hierarchical vector finite elements on curvilinear domains in 2-D. IEEE Transactions on Antennas and Propagation, 54(2):734–738, February 2006.

[14]
I M Mason, J H Cloete, W J A van Brakel, and J E Hargreaves. Electromagnetic reverberation at VHF on wires in uncased water-filled boreholes. Electronics Letters, 42(5):306–307, 2006.

[15]
M Rütschlin, J H Cloete, and K D Palmer. A guarded cylindrical capacitor for the non-destructive measurement of hard rock core samples. Measurement Science & Technology, 17(6):1390–1398, 2006.

[16]
M Schoeman and P Meyer. On the use of adaptive rational interpolation for the calculation of resonator characteristics from EM analysis. International Journal of Rf and Microwave Computer-Aided Engineering, 16(6):545–553, 2006.

[17]
C M Simmat, P L R Herselman, M Rütschlin, I M Mason, and J H Cloete. Remotely sensing the thickness of the UG2 platinum reef using borehole radar. Journal of Geophysics and Engineering, 3(1):43–49, 2006.

[18]
J P Swartz. A python toolbox for computing solutions to canonical problems in electromagnetics. IEEE Antennas and Propagation Magazine, 48(3):78–81, 2006.

[19]
M M Botha and D B Davidson. Decomposition of the mixed first-order, divergence conforming function space on a tetrahedral mesh. In 8th International Workshop on Finite Elements for Microwave Engineering, Stellenbosch, South Africa, page 32, 2006.

[20]
M M Botha and J M Jin. Adaptive analysis with a stationary FE-BI formulation. In 8th International Workshop on Finite Elements for Microwave Engineering (abstract only), Spier Wine Estate, Stellenbosch, South Africa, page 19, 2006.

[21]
N Marais and D B Davidson. Comparison of time domain FEM formulations. In 8th International Workshop on Finite Elements for Microwave Engineering (abstract only), Stellenbosch, South Africa, page 54, 2006.

[22]
N Marais and D B Davidson. Driving and extending legacy codes using Python. In 22nd annual review of progress in Applied Computational Electromagnetics, Miami, Florida, USA, Applied Computational Electromagnetics Society, pages 205–210, 2006.

[23]
M Schoeman, T Dhaene, and P Meyer. Vector fitting and state equation transformations to extract spice models. In International Conference on Numerical Analysis and Applied Mathematics 2006, Hotel Belvedere Imperial, Crete, Greece, Wiley-CCH, pages 462–465, 2006.

[24]
M Schoeman and P Meyer. Prediction of microwave resonator frequencies using 1D adaptive vector fitting. In International Conference on Numerical Analysis and Applied Mathematics 2006, Hotel Belvedere Imperial, Crete, Greece, Wiley-CCH, pages 472–475, 2006.

[25]
J P Swartz and D B Davidson. Curvilinear vector finite elements using hierarchical basis functions. In 22nd annual review of progress in Applied Computational Electromagnetics, Miami, Florida, USA, Applied Computational Electromagnetics Society, pages 632–635, 2006.

[26]
J P Swartz and D B Davidson. Curvilinear vector finite elements using hierarchical basis functions. In 8th International Workshop on Finite Elements for Microwave Engineering, Stellenbosch, South Africa, page 34, 2006.

[27]
M M Botha. Decomposition of the first-order Raviart-Thomas space on a tetrahedral mesh, with an application in acoustic analysis. In 30th Annual Conference of the South African Society for Numerical and Applied Mathematics, University of Stellenbosch, Stellenbosch, South Africa, 2006.

[28]
N W Ebertsohn, R H Geschke, and H C Reader. Cable tray transfer impedance measurement. In SAUPEC 2006, University of KwaZulu Natal, Durban, South Africa, pages 358–361, 2006.

[29]
N Marais and D B Davidson. Object oriented extension of legacy numerical software with python. In SANUM, Stellenbosch, South Africa, pages 1–2, 2006.

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