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Telecommunications and Radio Engineering

年間 12 号発行

ISSN 印刷: 0040-2508

ISSN オンライン: 1943-6009

SJR: 0.185 SNIP: 0.268 CiteScore™:: 1.5 H-Index: 22

Indexed in

ORBICTRON−OSCILLATOR: DESCRIPTION OF A MODEL AND COMPUTATIONAL RESULTS OBTAINED IN THE 180 GHZ RANGE

巻 73, 発行 12, 2014, pp. 1087-1103
DOI: 10.1615/TelecomRadEng.v73.i12.50
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要約

At present submm wave sources are in great demand when many engineering issues have to be tackled. Specifically these are luggage scanning, photography of tumors, radars and coupling between large-size high-speed computers. These sources are bound to generate an output power from 1 to 50 W when using environmentally-friendly low-voltage electron flows. Among the electromagnetic radiation mm-wave sources the modification of an orotron is an obvious candidate for generating submm-waves. In this oscillator modification the binary comb is used instead of a plane periodical reflecting structure to ensure the wave slowing-down. This type of modification was referred to as an orbictron (abbr. open resonator, binary comb, electron). The critical factors that result in diminishing its efficiency, as the operating frequency increases, are sheet electron flow layering (lamination) effect and clipping of the HF−field amplitude in a rectangular channel where the interaction of electrons and electromagnetic waves takes place. These factors are due to the usage of the open resonator with marginally high loaded Q. A resonance effect in the binary comb of the orbictron has been detected. It showed that the HF−field amplitude in the electron-wave interaction space surpassed the field amplitude many times across the space between the operating surfaces of open resonator mirrors. This effect is apt to change radically the estimation of the required Q value of the orbictrons resonance system and eliminates the amplitude clipping problem. Using the channel for the sheet electron flow in the interaction space as the form of the binary comb's operating tapered-shaped surfaces (klynoorbictron) eliminates the problem of the sheet electron flow lamination (layering). The mathematical model that we have devised was applied to carry out an optimization search for promising variants of the orbictron-oscillator design in the 180 GHz range, with a 3.5 kV operating voltage of the electron flow and 0.1 F of the operating current. We have found the oscillator variants providing 10 to 12% efficiency with the quality factors not exceeding 1 000. It is shown that the efficiency tends to increase up to 14% owing to the use of klynotron effect (klynoorbictron) in the orbictron-oscillator, whereas the resonator Q−factor shows a three-fold decrease. The obtained results indicate that the orbictron and its modified designs of klynoorbictron hold a great promise as THz-range electromagnetic radiation sources.

によって引用された
  1. Yeryomka Darya, On design of FEL-based orbictron terahertz range radio spectrometer for application in art expertise technology of art works, 2016 IEEE 7th International Conference on Advanced Optoelectronics and Lasers (CAOL), 2016. Crossref

  2. Yeryomka V. D., Nesterov I. A., Mizrakhy S.V., Reflective Orbictron – THz Waves Generator, 2020 IEEE Ukrainian Microwave Week (UkrMW), 2020. Crossref

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