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High Power Microwave Metamaterial Based Passive And Active Devices, Hamide Seidfaraji

Electrical and Computer Engineering ETDs

The goal of this dissertation is to design novel metamaterials for High Power Microwave devices. Metamaterials (MTM) are artificial periodic structures, which support reversed Cherenkov radiation and backward wave propagation. Microwave sources transform the kinetic energy of an electron beam into microwaves through the interaction of the electrons with a periodic slow wave structures (SWS). Here, a metamaterial (MTM) waveguide is proposed for use in a microwave oscillator instead of a SWS. The interaction of a multi-beam cathode with a set of MTM structures inside a cylindrical waveguide is studied and analyzed.

Group theory is used to design a metamaterial …

Design Of An O-Type Metamaterial Slow Wave Structure For High Power Microwave Generation, Sabahattin C. Yurt

Electrical and Computer Engineering ETDs

The aim of this dissertation is to design a novel metamaterial slow wave structure (MSWS) for high power microwave (HPM) generation which is an efficient and compact new generation O-type device whose output parameters are comparable to, and even better than conventional devices. There is increasing interest in using metamaterials for designing HPM sources because of their so-called unique electromagnetic properties that are not found in nature, such as below cutoff propagation, which is the main property that allows for a compact design, and negative refractive index that allows backward wave propagation and reversed Cerenkov radiation. As such new beam/wave …