Frequency tunable gyrotron using backward-wave components

By Tsun-Hsu Chang, T. Idehara, I. Ogawa, L. Agusu, S. Kobayashi. International Conference on Infrared, Millimeter, and Terahertz Waves, 2008

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We present a frequency tunable scheme for the gyrotron at millimeter/submillimeter regime. Unlike step-tunable type where oscillation jumps discretely in different transverse modes, this scheme allows a smooth tuning within a single transverse mode using its backward-wave component. The characteristics of backward-wave interaction will be shown. A proof of principle experiment was conducted with a sealed cavity. The result shows the oscillation frequency smoothly transitions over a wide range of 6 GHz from 134 to 140 GHz. The proposed mechanism is capable of producing medium output power with broad frequency tunability up to sub-terahertz region.

View Paper: https://www.semanticscholar.org/paper/91419543e97a900edc1234125f24682e28385c18