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Showing 1 to 9 of 9 for “"High-Power Microwave (HPM)"”.
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Design, fabrication, testing, and application of a sub-wavelength microwave lens
… than the traditional diffraction-limited size, higher power density can be achieved in the focal spot. Further, subwavelength focusing is useful in imaging applications to view objects smaller than one wavelength. Using metamaterials is a common method for creating lenses that can beat the …
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Compact power conditioning and RF systems for a high power RF source
As part of the University Consortium for High Power Microwave (HPM) Integration, compact power conditioning and RF systems were investigated with a maximum diameter of 15.24 cm. A simulator of a flux compression generator (FCG) was built as a non-destructive test stand to evaluate the power …
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Microwave Triggered Laser Ionization of Air
In this thesis the measurements and analyses of high power electromagnetic wave interaction with a laser-induced plasma (LIP) have been investigated. The laser-induced breakdown processes in air generated by focusing a 600 mJ, 7 ns pulselength, 1064 nm wavelength Nd:YAG laser onto a 30 μm spot size …
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RELATIVISTIC BACKWARD WAVE OSCILLATOR WITH A GAUSSIAN RADIATION PATTERN AND RELATED TECHNOLOGIES
Short pulse high power microwave (HPM) devices with Gaussian radiation pattern are attractive for many applications. The importance of the Gaussian microwave beam is that its maximum energy density is concentrated on axis. The purpose of this study is to use a backward wave oscillator (BWO), which …
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Advancing high power microwave spark-gap technology : design and analysis of a coaxial ringdown oscillator
High-power microwave (HPM) systems play a significant role in radiated Intentional Electromagnetic Interference (IEMI) technologies. Generating high peak voltages allows HPM systems to produce powerful electromagnetic pulses. However, their development is limited by challenges in achieving high …
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Design of Microwave Front-End Narrowband Filter and Limiter Components
… radiation from intentional and unintentional high-power microwave (HPM) sources. This is of interest because many commercial microwave communications and sensor systems are unprotected from high power levels. Novel technologies to harden front-end components must maintain existing system …
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Investigation of electrically tunable diode-based nonlinear transmission lines as pulse shaping networks for microwave systems at megawatt peak powers
The pulsed power community is actively concentrating on the miniaturization of high-power microwave (HPM) systems, driven by the growing demand for applications on oceanic vessels, satellites, and unmanned aerial vehicles. One promising approach to achieve system miniaturization involves utilizing …
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Pulsed ring-down antennas for implementation in a phased array
… great interest due to its compact size and peak power on target potential. A pulsed ring-down antenna operates by charging the single element antenna with a high potential source and then closing a switch to develop transient wave reflections on the antenna. Typical CW case analysis does not …
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Computational modeling and simulation of nonlinear electromagnetic and multiphysics problems
… the simulation. Breakdown phenomena during high-power microwave (HPM) operation are investigated using different physical and mathematical models. During the breakdown process, the bound charges in solid dielectrics and air molecules break free and are pushed to move by the Lorentz force …