Nick Ridler received the B.Sc. degree from King’s College London, University of London, London, UK, in 1981. He is Head of Science for the Department of Electromagnetic and Electrochemical Technologies at the UK’s National Physical Laboratory (NPL). He is an NPL Fellow, an Honorary Professor at the Universities of Glasgow and Liverpool, UK, and, a Visiting Professor at the Universities of Kent and Leeds, UK. He is also a Non-Executive Director of LA Techniques Ltd. He is a Fellow of the IEEE, a Fellow of the Institution of Engineering and Technology (IET) and a Fellow of the Institute of Physics (IOP). He has more than 35 years’ experience working in industrial, government and academic research establishments. His main area of interest is accurate, high-frequency, electromagnetic measurement (from 1 kHz to 1 THz).
This talk gives an overview of the principles and processes involved in dealing with errors in measurements, particularly at RF and microwave frequencies. The talk shows how the concept of uncertainty can be used to quantify the effects of errors that occur during measurements. The methods used to evaluate and express uncertainty are described and illustrated with some simple practical examples. The purpose of this talk is to enlighten rather than mystify the subject of dealing with error and uncertainty in measurement.
The humble coaxial connector has been a regular player in the high frequency electronics industry for the past fifty years or more. But it is this apparent familiarity, and apparent simplicity, that often leads to misunderstandings and mistakes with the use of connectors. This talk will give a review of coax connectors with an emphasis on how to get the most from any given connector. The talk begins with an historical overview of the evolution of the coax connector right up to the present day. The dos and don’ts of using connectors will also be addressed and how to select the best connector for a given application. Finally, some tips will be given on how to keep connectors in good health and how to ensure long connector life.