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- W4286362080 abstract "The parameters for a kilowatt-level high-power terahertz amplifier were explored based on the higher-order mode and extended-interaction mechanism. It has been demonstrated that the antisymmetric electrical field mode (TM <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>21</sub> ) has a unique advantage in achieving high power. Physical factors on power extraction were studied. In particular, the heavily reduced <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>${Q}_{{0}}$ </tex-math></inline-formula> has a great effect on the coupling characteristic as well as the output power. It is found that the critical coupling state, i.e., <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>${Q}_{e} = {Q}_{{0}}$ </tex-math></inline-formula> , defines an upper limit of the power that can be extracted from the output circuit. The design of a complete interaction circuit was accomplished. The particle-in-cell (PIC) simulations showed that a saturated power of 1.2 kW can be achieved at 220 GHz with a voltage of 45 kV and a total current of <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$2times0.6$ </tex-math></inline-formula> A where two beams were used. The saturated gain is over 30 dB with a 3-dB bandwidth of <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$sim 400$ </tex-math></inline-formula> MHz." @default.
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- W4286362080 date "2022-09-01" @default.
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- W4286362080 title "Exploration of a Kilowatt-Level Terahertz Amplifier Based on Higher-Order Mode Interaction" @default.
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- W4286362080 doi "https://doi.org/10.1109/ted.2022.3190807" @default.
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