This book describes a new, extremely low frequency (ELF)/ very low frequency (VLF) miniaturized transmitter concept, based on the mechanical motion of permanent magnets or electrets. The authors explain how utilizing the very high energy density of modern ferromagnetic and ferroelectric materials, such electromechanical transmitters'' can provide much higher field generation efficiency than conventional antennas, thus enabling practical ELF/VLF wireless communications links. The text begins with the fundamental challenges of such links and provides an historical overview of the attempts that have been made to address these challenges. It then focuses on the design and implementation of practical electromechanical ELF/VLF transmitters, which is an interdisciplinary subject that spans multiple research areas including electromagnetics, power electronics, control systems, and mechanical design. The authors also describe how such transmitters can be combined with receivers and signal processing algorithms to realize complete ELF/VLF links in challenging environments.

Provides the first comprehensive introduction to the rapidly growing field of electromechanical ELF/VLF transmitters Explains the design, modeling, construction, and operation of electromechanical transmitters Includes discussion of the use of electromechanical transmitters, within complete ELF/VLF radio links

Autorentext
Jarred S. Glickstein received the B.S., M.S., and Ph.D. degrees in electrical engineering from Case Western Reserve University, Cleveland, OH, USA, in 2016. 2018, and 2022, respectively. He was a Research Assistant with the Center for Global Health and Diseases, Case Western Reserve University (CWRU), in 2015, and a Research Assistant with the Integrated Circuits and Sensor Physics Lab at CWRU from 2015-2022. His research interests include analog sensors and instrumentation design, electromechanical devices, experiment automation, and novel applications of magnetic materials. 

  **Soumyajit Mandal **received the B.Tech. degree in electronics and electrical communications engineering from IIT Kharagpur, Kharagpur, India, in 2002, and the M.S. and Ph.D. degrees in electrical engineering from the Massachusetts Institute of Technology (MIT), Cambridge, MA, USA, in 2004 and 2009, respectively. He was a Research Scientist with Schlumberger-Doll Research, Cambridge, from 2010 to 2014, an Assistant Professor with the Department of Electrical Engineering and Computer Science, Case Western Reserve University, Cleveland, OH, USA, from 2014 to 2019, and an Associate Professor with the Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL, USA, from 2020-2021. He is currently a Senior Engineer in the Instrumentation Division at Brookhaven National Laboratory, Upton, NY, USA. He has over 150 publications in peer-reviewed journals and conferences and has been awarded 24 patents. His research interests include low-power analog and RF circuits, embedded systems, magnetic resonance sensors, and precision instrumentation for various biomedical and sensor interface applications. Dr. Mandal received the President of India Gold Medal in 2002, the MIT Microsystems Technology Laboratories (MTL) Doctoral Dissertation Award in 2009, the T. Keith Glennan Fellowship in 2016, and the IIT Kharagpur Young Alumni Achievers Award in 2018. He is a Senior Member of the IEEE.

Inhalt

Introduction.- Historical overview.- Electromagnetic modeling.- Design of ELF/VLF communications links.- Mechanical design.- Closed-loop transmitter control.- ELF/VLF receiver design.- Portable ELF/VLF radios.