116. SCALABLE HIGH POWER MICROWAVE SOURCE & TUNABLE THRESHOLD NONLINEAR ABSORBING METASURFACES

Department: Electrical & Computer Engineering
Faculty Advisor(s): Daniel F. Sievenpiper

Primary Student
Name: Aobo Li
Email: aol006@ucsd.edu
Phone: 858-349-5067
Grad Year: 2020

Abstract
High power microwave generation is gaining increasing interests in many applications due to the heavy reliance of military systems on electronics, and the vulnerability of these systems to electronic attack. The centerpiece of our work is a resonant textured surface that is charged up during a charging state with a static voltage and then switched to an oscillating radiative state in which the stored energy is dissipated as radiation. Meanwhile, high power microwave absorbers are also important in protecting electronic devices inside of the vehicles. Traditional absorbers can only be effective with only normal direction incidence, however the surface currents generated by the parallel direction incident waves can cause damages or interference to sensitive electronic devices or receivers even through a small gap of the shield. Unlike the conventional absorbers absorb all frequency regions in normal direction, our work concentrate on absorbing plane waves along the surface with tunable thresholds and absorption rates.

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