In this presentation we will focus on High-Power Microwave (HPM) Systems. We will review the physical principles of HPM generators and antennas for radiating HPM pulses. Generally speaking, the power levels are in 100’s of MW and the HPM pulse, which could be repetitive, lasts for about 100 cycles to bring out the full response of the target system. In present day society, we are increasing our reliance on widespread technological advancements in computer and electronic systems. The diverse activities of our society such as civil defense, emergency management, air-traffic safety and control, law-enforcement (police and fire), ambulance, communication, hospitals and commerce (both internet and otherwise), have become increasingly dependent on these advancements in technology. Such sophistication comes with a price of vulnerability from a wide variety of threats. There is a diversity of threats, one of which is natural lightning, which happens to be the only threat made by nature. The remainder such as Nuclear Electromagnetic pulse (NEMP), High-Power Microwaves (HPM), and Ultra-wideband (UWB) are all made by mankind. When such environments are created with a purpose of damaging electrical and electronic systems, it is classified as the Intentional Electromagnetic Environment or the IEMI. The HPM threat is real and many nations are engaged in developing HPM facilities for vulnerability testing. We shall cover some example facilities, their capabilities and associated diagnostics from open literature. Phase locking of HPM sources is also possible. Time permitting phase locking and examples of mode conversion will also be described in this presentation.
Dr. Giri has over 40 years of work experience in the general field of electromagnetic theory and its applications in NEMP (Nuclear Electromagnetic Pulse), HPM (High-Power Microwaves), Lightning, and UWB (Ultra Wideband). A complete description of his academic training and work experience may be seen at his website: www.dvgiri.com He obtained the B.Sc., Mysore University, India, (1964), B.E., M.E., Indian Institute of Science, (1967) (1969), M.S., Ph.D., Harvard University, (1973) (1975), Certificate, Harvard Introduction to Business Program, (1981). Since 1984, he is a self-employed consultant doing business as Pro-Tech, in Alamo, CA, performing R&D work for U.S. Government and Industry. He is also an Adjunct Professor in the Dept. of ECE, University of New Mexico, Albuquerque, New Mexico, USA. Dr. Giri has taught graduate and undergraduate courses in the Dept. of EECS, University of California, Berkeley campus. Dr. Giri was a Research Associate for the National Research Council at the Air Force Research Laboratory (AFRL), Kirtland AFB, New Mexico, where he conducted research in EMP and other aspects of electromagnetic theory. LIFE FELLOW of IEEE, Member of Commission B, URSI International Chairman of Commission E, URSI. (2104-2017) Was an Associate Editor for the IEEE Transactions on EMC SUMMA Foundation FELLOW Book- High-Power Microwave Systems and Effects published by Taylor and Francis in 1994. Recipient of the IEEE Antennas and Propagation Society’s 2006 John Kraus Antenna Award. Recipient of Hind Ratan and NRI of the year Awards during Republic Day 2017 His second book titled High-Power Electromagnetic Radiators: Nonlethal Weapons and Other Applications has been published by Harvard University Press in 2004. He works with Prof. Raj Mittra, publishing an on-line Forum and Journal on Electromagnetics called FERMAT (www.e-fermat.org).