Coaxial Electrical Circuits for Interference-Free Measurements

Autorentext
Shakil Awan was born in Pakistan in 1971. After gaining his PhD he worked at the UK National Physical Laboratory from 1997-2007 on impedance measurements and MEMS sensors. He is currently working on MRI at Imperial College and graphene RF nanoelectronics at Cambridge University.

Klappentext
The authors have between them more than 60 years of experience in making electrical measurements in National Measurement Laboratories. These laboratories are the source of measurement standards and techniques for science and engineering and are dedicated to maintaining the international system of units (SI) by establishing and disseminating the values of measurement standards with the lowest possible uncertainty. Careful attention to detail is required in designing measurement systems that eliminate electrical interference and are as simple and as close to first principles as possible. This book draws on their experience by offering guidance and best practice for designing sensitive electrical measurement circuits.
In particular the book describes examples that demonstrate the elegance, flexibility and utility of balanced-current coaxial networks in obtaining the ultimate in noise-matching and interference elimination for precise and accurate voltage, current and power measurements. It also updates an earlier book on coaxial AC bridges by including recent AC measurements of quantum Hall resistance to establish a primary quantum standard of impedance and by extending impedance measurements in general to higher frequencies.

Inhalt
Chapter 1: Introduction Chapter 2: Sources, detectors, cables and connectors Chapter 3: The concept of a low-frequency coaxial network Chapter 4: Impedance measurement Chapter 5: General principles of accurate impedance measurement Chapter 6: Impedance standards Chapter 7: Transformers Chapter 8: General considerations about impedance comparison networks Chapter 9: Bridges to measure impedance ratios Chapter 10: Application of interference-free circuitry to other measurements Appendices

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