Sunday Short Course - October 11th, 8 am - 5 pm

Dr. Daniël Janse van Rensburg and Dr. Stuart Gregson of Nearfield Systems, Inc. will present:

Near-field Measurement Error Analysis & Computational Electromagnetic Modelling

This short course will focus on near-field range assessment based on the well-known 18-term error budget framework that is commonly used in industry. Determination of each error term will be discussed and where applicable, computational electromagnetic modelling will be used to demonstrate specific concepts. The course will consist of six one hour lectures, with three being given in the morning, and three in the afternoon.  Each lecture will be separated by a 15 minute break with one hour being set aside for lunch.

Course Outline

1. Fundamentals of Electromagnetics and Near-Field Antenna Testing

  • Surface equivalence theorem
  • Equivalence currents & radiation integrals
  • NF formulations

2. Implementation of Near-Field Antenna Test Systems

  • Examples of test systems and construction
  • Typical limitations limiting application
  • Techniques for enhancing performance

3. Introduction to Measurement Error Analysis and Range Assessment

  • The 18-term assessment framework
  • Defining equivalent noise levels
  • Methodology for establishing noise levels

4. Error Assessment through Measurement and Electromagnetic Simulation I

  • Case studies demonstrating how CEM and measurement techniques can be used to assess system performance

5. Error Assessment through Measurement and Electromagnetic Simulation II

  • Case studies demonstrating how CEM and measurement techniques can be used to assess system performance

6. Recent Advances in Error Correction, Evaluation and Pattern Comparison

  • Reflection suppression techniques
  • Automated range assessment techniques
  • Range inter-comparison methodologies



Daniël Janse van Rensburg has been working in the microwave test industry for the past 20 years, both as user and supplier of automated antenna test systems. His particular fields of interest are measurement error analysis & computational electromagnetic modelling. He graduated from the University of Pretoria, South Africa and was awarded the B. Eng (cum laude), M. Eng and Ph.D. degrees in 1985, 1987 and 1991 respectively, all in Electrical Engineering. He joined the Canadian Space Agency as research engineer in 1994 and in 1996 he joined COMDEV’s Space Division in Cambridge, ON, Canada. In 1997 he joined Nearfield Systems Inc in Torrance, CA, USA where he is employed as Sales & Marketing Manager. He is a Senior Member of the IEEE, Licensed Professional Engineer in Ontario, Canada and a Fellow of the AMTA. He served as president of the AMTA in 2007. He is the author of more than 40 journal and conference papers and regularly contributes to industry courses on near-field test technology. In 2005 Dr Janse van Rensburg was appointed as adjunct professor in the School of Information Technology and Engineering, University of Ottawa, Ottawa, ON, Canada.



Stuart Gregson has been working in the field of antenna design and measurement for the space and aerospace industries for nearly 20 years and is with Nearfield Systems Inc. working as their academic and technical liaison.  Dr Gregson is also a Visiting Senior Research Fellow in the School of Electronic Engineering and Computer Science at Queen Mary, University of London.  He received his BSc degree in Physics in 1994 and his MSc degree in Microwave Solid State Physics in 1995 both from the University of Portsmouth.  He received his PhD degree in 2003 from Queen Mary, University of London with near-field antenna measurements and statistical pattern recognition as his main subject areas.  He has special experience with near-field antenna measurements, finite array mutual coupling, computational electromagnetics, installed antenna performance prediction, electromagnetic scattering, and has published more than sixty peer reviewed research papers on these topics, and regularly organizes and contributes to industrial courses on near-field testing.  At the end of 2007 he was the lead author of the research text, Principles of Planar Near-Field Antenna Measurements, and in 2014 he co-authored, Theory And Practice of Modern Antenna Range Measurements, both of which are published in the IET Electromagnetic Waves Series.  Together with co-author Greg Hindman, he received the 2008 Best Technical Paper Award from AMTA.  He is a Senior Member of the AMTA, a Fellow of the Institution of Engineering and Technology, and a Fellow of the Institute of Physics; and is a chartered Engineer and Physicist.