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DIRECTED
ENERGY
PROFESSIONAL
SOCIETY
Abstract: 24-Systems-134
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UNCLASSIFIED, PUBLIC RELEASE
Design and experimental test of a tapered nonlinear transmission line RF source
A numerical circuit model of a PCB-sized lumped-element nonlinear transmission line (NLTL) with saturable toroid inductors is presented. This model is shown to reasonably reproduce experimentally measured RF outputs of an NLTL for both the forward-wave and backward-wave operating modes. The numerical model is then used with a genetic algorithm to optimize the selection of capacitance and inductance at each stage of the NLTL. The optimization scheme predicted that a tapered NLTL, with a higher inductance and higher capacitance at the front of the NLTL, with a gradual transition to inductance and capacitance would result in increased RF output. An experimental version of the NLTL was built and tested. In experiments, the optimized NLTL produced ~30% higher RF power (~12 kW) at notably higher frequency than the uniform NLTL. Further, the optimized NLTL featured a much broader range of operation compared to the uniform NLTL.
UNCLASSIFIED, PUBLIC RELEASE
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