Planar Bragg Reflectors for Frequency-Tunable Sub-Terahertz Gyrotrons

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Abstract
A novel concept of a frequency-tuned sub-terahertz gyrotron based on a combination of an irregular low-frequency resonator and an external reflector has been proposed recently. A simulation was carried out for a fundamental-cyclotron-harmonic gyrotron that demonstrates the possibility of achieving high (10–30%) efficiencies in a wide (~10%) frequency range. A possible solution to the problem of narrow-band frequency-tunable external reflectors in the form of so-called modified planar Bragg structures is discussed. The manufacturing of such structures on the basis of a novel additive technology based on photopolymer 3D printing, as well as the results of “cold” experiments of the manufactured samples, are described in the paper.
Funding Information
  • Russian Science Foundation (22-19-00490, 21-19-00877)
  • Russian Science Foundation (22-19-00490, 21-19-00877)

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