This book addresses the need to establish measurement standards for electromagnetic fields to produce accurate results and is ideal for engineers concerned with measurement techniques.
While it provides a review of fundamental properties of electromagnetic fields and the simple antennas that can generate and receive such fields, the main focus of this book is dedicated to the analysis of the accuracy of measurements and field standards using a range of radiating structures. It is designed to help develop the following measurement standards: proper calibration of the measuring instrument, external environmental factors that affect accuracy and competence and training of the instrument operator. As such, it is ideal for practicing engineers in the field of antennas, electromagnetic compatibility and electromagnetic propagation who are concerned with measurement techniques.
This is a companion book to Electromagnetic Measurements of the Near Field.
Author(s): Eugeniusz Grudzinski, Hubert Trzaska
Series: Scitech Series on Electromagnetic Compatibility
Publisher: SciTech Publishing
Year: 2014
Language: English
Pages: xii+202
Tags: Физика;Электродинамика / Электричество и магнетизм;
1 Introduction
2 EMF of an arbitrary structure
2.1 The near and the far field
2.2 EMF of a thin, symmetric, resonant dipole antenna
2.3 Homogeneity of EMF near a resonant dipole
2.4 EMF of a small loop antenna
2.5 Homogeneity of EMF near small loop
3 Methods of the standard EMF generation
3.1 Calibration of meters with dipole antennas
3.2 Calibration of meters with loop antennas
3.3 Calibration of meters with directional antennas
3.4 Meter calibration with the use of guided waves
3.5 Secondary standards and exposure systems
4 Accuracy analysis of EMF standards with dipole antennas
4.1 Accuracy analysis
4.2 Choice of the OATS
4.3 Measurement of the electrical parameters of the ground
4.4 Analysis of the accuracy of the SRA standard
4.5 Analysis of the accuracy of the STA method
4.6 Directional antenna calibration
5 Accuracy analysis of EMF standards with loop antennas
5.1 Accuracy analysis of the SRA standard
5.2 Accuracy analysis of an STA standard
5.3 An EMF standard with Helmholtz coils
6 Accuracy analysis of EMF standards with a segment of a transmission line
6.1 EMF in a strip line
6.2 Wave impedance of a TEM cell
6.3 Accuracy of the line accomplishment and its role in line accuracy limitation
6.4 Disturbances of the wave impedance
6.5 Line excitation measurement accuracy
6.6 Accuracy of the EMF standard with a segment of a transmission line
6.7 Homogeneity of EMF in a TEM cell
6.8 An OUT in a TEM cell
7 Accuracy analysis of the standards with horn antennas
7.1 Accuracy of determination of the power gain
7.2 Accuracy of excitation measurement
7.3 Accuracy of the standard estimation
7.4 Nonstationary EMF standard
8 Comparative analysis of the EMF standards
8.1 Double calibration method
8.2 Comparison of different type standards
8.3 International EMF standards comparison
8.4 Necessity of calibrations
9. Final comments
References
