LabVIEW based Automation Guide for Microwave Measurements (eBook)

Satya Kesh Dubey completed his Ph.D. in Electronics from Allahabad University, Allahabad, India, with eight International Journal Papers. He joined the National Institute of Technology, Raipur (C.G.) as a Lecturer in 2009. During 2009–2010, he served the Institute for Plasma Research, Ahmedabad, India as a Postdoctoral fellow for a year in the Microwave Diagnostic Group. In 2010, he joined National Aerospace Laboratories, Bangalore as Scientist Fellow in the Computational Electromagnetic group. In 2012, he joined National Physical Laboratory, New Delhi as a Scientist in Microwave activity. He has guided more than 15 M.Tech. students and two Ph.D. scholars are enrolled under his guidance. He has published 25 papers in different international journals and conference proceedings with h-index 7 and i-index 3. His current areas of research are biological effect of electromagnetic (EM) radiations, electromagnetic induced transparency, E-field probes and sensors, specific absorption rate (SAR) probes, microstrip antenna, millimeter wave, and computational modeling of biological tissue in EM radiations.Naina Narang graduated in 2012 from Kurukshetra University, India with Bachelors in Computer Engineering. After graduation, she joined the CSIR-National Physical Laboratory, India as a Research Intern and worked for two years on laboratory automation required for radio frequency (RF) Attenuation and Impedance Standards. In 2014, she enrolled in the Ph.D. program in the Academy of Scientific and Innovative Research (AcSIR) and started working on the establishment of Standards of Specific Absorption Rate (SAR). She has 2 SCI publications and 4 conference papers. She has keen interest in instrument control, LabVIEW programming for automation, computational and numerical techniques for electromagnetic. Presently, she is working on software copyright for simulation of nanoparticle response in RF exposure.P.S. Negi is presently the Head of Microwave Standards group in Apex level Standards and Industrial Metrology, CSIR-National Physical Laboratory, New Delhi. He has an experience of more than 30 years and expertise in attenuation and impedance measurement. He has piloted/participated in several key/supplementary comparisons at international level sponsored by International Bureau of Weights and Measures (BIPM), France. He has developed primary mismatch standards, 30 MHz WBCO-based primary standard for attenuation with high accuracy and is the author of more than 100 Journal and Conference papers. He is presently supervising three activities that deal with various parameters such as microwave attenuation, impedance and power standards along with the low- and high-frequency voltage and current standards.V.N. Ojha is presently the Head of Apex Level Standards and Industrial Metrology. He worked as a Scientist at the CSIR-National Physical Laboratory, New Delhi for more than 30 years and now leads the Electrical and Electronics Standards in the organization. He has keen research interest in low temperature microwave measurements, Josephson junction, Quantum Hall effect and Watt balance and is the author of more than 100 Journal and Conference papers. He has been awarded internationally the Deutscher Akademischer Austausch Dienst (DAAD) Fellowship during 1990–1992 and the URSI Young Scientist Award, Belgium in 1993. In 1992, he was also awarded the CSIR-Young Scientist Award in Physical Science.

Preface 6
Contents 7
List of Figures 9
List of Tables 11
About the Authors 12
1 Introduction 14
2 LabVIEW Programming 16
2.1 Basic Concepts 16
2.1.1 Virtual Instruments (VI) 16
2.1.2 Front Panel 17
2.1.3 Block Diagram 18
2.2 LabVIEW Features 19
2.3 Virtual Instrumentation 19
2.3.1 Virtual Instrumentation Foundation 19
2.3.2 General Purpose Interface Bus (GPIB) 19
2.3.3 Standard Commands for Programmable Instruments (SCPI) 21
2.3.4 Instrument Control in LabVIEW 21
2.4 Advanced LabVIEW Programming Techniques 22
References 22
3 Microwave Measurement Systems 23
3.1 Basic Microwave Instruments 23
3.1.1 Microwave Signal Generators 24
3.1.2 Microwave Receivers 24
3.2 Basic Microwave Measurement Methods 26
3.2.1 Attenuation Measurement 26
3.2.2 Microwave Power Measurement 29
3.2.3 Scattering Parameter 29
3.3 Uncertainty Evaluation in Attenuation Measurement 31
3.3.1 Uncertainty in Power Ratio Technique 32
3.3.2 Uncertainty in IF Substitution Technique 33
3.3.3 Comparison of Measurement Results 33
3.4 Summary 34
3.5 Precap 35
References 36
4 Software Development 37
4.1 LabVIEW-Based Automatic Measurement System 37
4.1.1 Software Requirement Specifications 38
4.1.2 Design of Graphical User Interface (GUI) 38
4.1.3 Configuring Transmitter, DUT, and Receiver 40
4.1.4 System Architecture 40
4.1.5 System Implementation 42
4.1.6 System Features and Drivers 44
4.2 Software Validation and Testing 45
References 45
5 Measurement Results 47
5.1 Data Analysis 47
5.2 Uncertainty Evaluation 48
5.3 Comparison of Results with Manual Measurements 51
5.4 Report Generation 53
6 Conclusion 55
About the Book 56
Uncited References 56