The course is partly funded by DST, Government of India.

Tutorial: High Power Microwaves Tutorial
Date:     February 21, 2011
Venue:   Hall-A
              National Science Seminar Complex, IISc Campus CV Raman Avenue, Bangalore, India

Time Schedule:
Duration(Hrs) Lecture Title Lecture Spectrum
1000-1045 Classification of HPEM based on Bandwidth HPM is but a small part of many types of HPEM signals. International IEC Standard on classifying High-Power EM signals will be discussed.
1045-1130 Documented EM Effects EM effects are real and they happen all the time, even in civilian facilities such as hospitals and on board aircrafts.  A list of documented EM effects will be discussed.
1130-1200 TEA/ COFFEE BREAK
1200-1245 HPM Sources and Phase Locking Various vacuum devices like Magnetron, Klystron, Reltron, Vircator etc will be discussed. Ultimately the tubes are part of a system. We define useful power extraction from tubes that is useful to an antenna engineer. Ways of phase-locking HPM sources will discussed here.
1245-1330 High-Power Moderate Band Systems This is an emerging technology. HPM is a single frequency signal. We are now building High-Power systems with 10 to 20 % bandwidth. The sources are typically transmission line oscillators energized by a DC charge. Source technologies, antenna systems and how they are used for vulnerability measurements will be discussed.
1330-1430 LUNCH BREAK
1430-1515 Hyperband Systems These are extremely broadband systems. Many systems exist and they have become work horses. Here physics of pulse power, antennas, measuring the bandwidths etc will be discussed.
1515-1600 Application of Hyperband Systems With Hyperband systems with bandwidths of nearing the theoretical maximum of 200%, many applications become possible. These applications have evolved in the last 5 to 8 years. Discussion on how various researchers are using these systems for myriad of interesting applications.
1600-1630 TEA/ COFFEE BREAK
1630-1715 HPM Facilities and their Capabilities and Diagnostics Review of some of the indoor and outdoor HPM facilities that exist in the world. Antenna design, type of HPM source, the type of antenna for some of these systems will be discussed. Measurement of Pulse power, Microwave radiated power; Field levels at a certain distance that test objects are illuminated with, frequency coverage etc.
1715-1800 HPEM Testing of a Buried Facility Bunkers and similar underground facilities have been designed for EMP hardness. With the advent of HPM and HPEM, these hardness calculations are being revisited. EMP frequencies only go up to about 200 - 300 MHz. Vulnerabilities can exist at higher frequencies. Experimental studies and the results from published literature will be discussed.

Tutor’s profile:
Dr Giri   Dr. Giri has over 35 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). 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, NM. He 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. He has served on the editorial board of the Journal of Electromagnetics, published by the Electromagnetics Society. He has also served as an Associate Editor for the IEEE Transactions on Electromagnetic Compatibility. He has co-authored a book titled High-Power Microwave Systems and Effects published by Taylor and Francis in 1994.
     
His second book titled High-Power Electromagnetic Radiators: Nonlethal Weapons and Other Applications has been published by Harvard University Press in 2004. He is a co-editor of a book titled Ultra-Wideband Short Pulse Electromagnetics 9, published by Springer, 2010. He has also published over 100 papers, reports etc.

Dr. Giri's contributions have been in the areas of Nuclear Electromagnetic Pulse (NEMP) simulators, design of radiating systems for high-power microwave (HPM) systems and developing ultra wideband (UWB) antenna systems.

Dr. Giri is an electromagnetic expert responsible for the design and optimization of major NEMP simulators in the U.S., Italy, Sweden, Switzerland, Germany and Israel. He designed, analyzed and successfully built the first reflector type of an Impulse Radiating Antenna (IRA), under SBIR Phase I and II contract awards from the Air Force Research Laboratory, Kirtland AFB, NM in 1996. Since that pioneering work, he and others have built many UWB systems that are finding many applications in military and civilian sectors.

Dr Giri 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). He is a FELLOW of the Institute of Electrical and Electronic Engineers (IEEE), a Charter Member of the Electromagnetics Society, and Associate Member of Commission B, URSI and Vice-Chairman of Commission E, USNC He is a co-recipient of the IEEE Antennas and Propagation Society’s 2006 John Kraus Antenna Award.