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Electronic Frequency Tuning in the 330-GHz CW Clinotron Oscillator With Modified Cavity
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DOI：10.1109/ted.2026.3703002.png)
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Abstract
En 中文
A 3-D theoretical model accounting for the transformation and reflection of propagating modes in the oversized cavity of a terahertz clinotron has been developed and applied to describe the operational characteristics of the 0.33-THz continuous-wave (CW) clinotron oscillator with a modified cavity. Numerical simulations revealed efficient transformation of higher order surface modes into bulk modes of the oversized cavity, enabling interpretation of the experimentally observed features of electronic frequency tuning of the 330-GHz clinotron oscillator in the frequency range from 280 to 335 GHz. Continuous electronic frequency tuning during excitation of higher order surface modes was experimentally demonstrated in the accelerating voltage range of 4.40–4.55 kV, corresponding to frequencies of 325–335 GHz, with a peak output power of 77 mW obtained during operation on the fundamental surface mode, while maximum output power of 110 mW was achieved at an accelerating voltage of 3.47 kV, corresponding to a frequency of 298 GHz.
Keywords:
Cherenkov oscillator
clinotron
mode transformations
sheet electron beam
slow-wave circuit
terahertz range
waveguide power output
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3.2
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685
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3.7W
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