publication . Article . 2013

Microwave generation enhancement of X-band CRBWO by use of coaxial dual annular cathodes

Hao Shao; Yan Teng; Changhua Chen; Jun Sun;
Open Access English
  • Published: 01 Jul 2013 Journal: AIP Advances (issn: 2158-3226, Copyright policy)
  • Publisher: AIP Publishing LLC
Abstract
This paper presents an approach that greatly enhances both the output power and the conversion efficiency of the coaxial relativistic backward wave oscillator (CRBWO) by using coaxial dual annular cathodes, which increases the diode current rather than the diode voltage. The reasons for the maladjustment of CRBWO under a high diode voltage are analyzed theoretically. It is found that by optimization of the diode structure, the shielding effect of the space charge of the outer beams on the inner cathode can be alleviated effectively and dual annular beams with the same kinetic energy can be explosively emitted in parallel. The coaxial reflector can enhance the co...
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doi: 10.1063/1.4817238
Subjects
free text keywords: Physics, QC1-999, General Physics and Astronomy, Microwave, Electromagnetic shielding, Coaxial, Cathode, law.invention, law, Space charge, Diode, Backward-wave oscillator, Energy conversion efficiency, Optics, business.industry, business
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