FDTD Modeling of EM Field inside Microwave Cavities (eBook)

Dr Shiv Narayan is currently associated with the Centre for Electromagnetics of CSIR-National Aerospace Laboratories (CSIR-NAL), Bangalore, India as Senior Scientist. He received Ph.D. degree in Electronics Engineering from Indian Institute of Technology, Banaras Hindu University (IIT-BHU), Varanasi, India in 2006. He held the position of Scientist B between 2007 and 2008, at SAMEER (Society for Applied Microwave Electronics Engineering and Research), Kolkata, India. His research interests are broadly in the field of electromagnetics applications; these include, frequency selective surfaces (FSS), metamaterials, numerical methods (FDTD and MM-GSM) in electromagnetics, antennas, and EM material characterization. He has published a SpringerBrief on FSS based high performance antennas in 2015. Dr Shiv is the author/ co-author of over 40 technical documents including peer reviewed journal and conference papers.  Ms. K. M. Divya received her B. Tech. degree in Electronics and Communication Engineering from Calicut University, Kerala in 2010 and completed her M. Tech. degree in Microwave and Radar Electronics from Cochin University of Science and Technology (CUSAT), Kerala in 2013. Currently, she is with the Bharat Electronics Limited (BEL), Bangalore, India. She was associated with the Centre for Electromagnetics, CSIR-NAL as Project Scientist from Nov. 2013 to May 2015. Her research interest includes the topics; FDTD modelling, FSS, and metamaterials.Mr. V. Krushna Kanth obtained his B.Tech (ECE) degree from Jawaharlal Nehru Technological University (JNTU), Anantapur, Andhra Pradesh, India in 2012. He obtained his M. Tech. degree in Electronics Engineering from Pondicherry Central University, Pondicherry (UT), India in 2015. He is currently a Project Assistant-III with the Centre for Electromagnetics of CSIR-National Aerospace Laboratories (CSIR-NAL), Bangalore, India. His current area of research interest includes; FSS, RCS field computation, and FDTD based modeling.

Preface 7
Acknowledgements 8
Contents 9
Abbreviations 10
Symbols 11
List of Figures 12
List of Table 19
1 FDTD Modeling of EM Field Inside Microwave Cavities 20
1 Introduction 20
2 Finite Difference Time Domain Method 21
2.1 Maxwell’s Curl Equations 22
2.2 Yee’s Algorithm 23
2.3 Implementation of FDTD Method 24
3 Analysis of EM Field Distribution Inside the Microwave Oven 26
3.1 RF Leakage Radiation 27
3.2 EM Field Distribution Inside the Oven Cavity 29
4 Modeling of Curved Cavities Using FDTD 44
4.1 Validation of FDTD Modeling for Curved Structure 45
4.2 EM Analysis of Field Distribution Inside the Hybrid-Cylindrical Microwave Autoclave 46
4.2.1 EM Field Distribution Due to Single Magnetron Source 49
4.2.2 EM Field Distribution Due to Five Magnetron Sources 55
4.2.3 EM Field Distribution Inside the Autoclave Cavity in the Presence of Sample 76
5 Summary 81
References 82
Author Index 84
Subject Index 85
Authors Biography 86
About the Book 87