FDTD Modeling of EM Field inside Microwave Cavities

This book deals with the EM analysis of closed microwave cavities based on a three-dimensional FDTD method. The EM analysis is carried out for (i) rectangular microwave ovens and (ii) hybrid-cylindrical microwave autoclaves at 2.45 GHz. The field distribution is first estimated inside domestic rectangular ovens in xy-, yz-, and zx-plane. Further, the RF leakage from the oven door is determined to study the effect of leakage radiation on wireless communication at 2.45 GHz. Furthermore, the EM analysis of the autoclave is carried out based on 3D FDTD using staircase approximation. In order to show the capability of autoclaves (excited with five source) for curing the aerospace components and materials, the field distribution inside autoclave cavity is studied in presence of aerospace samples. The FDTD based modelling of oven and autoclave are explained with the appropriate expressions and illustrations.

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.

Introduction.- Finite Difference Time Domain Method.- Analysis of EM Field Distribution inside Microwave Oven.- Modeling of Curved Closed Cavity using FDTD.- Summary.- References.- Author Index.- Subject Index.