Enhancing Frequency-Tuning Ability of an Improved Relativistic Backward-Wave Oscillator

Author

Song, Wei ; Zhang, Xiaowei ; Chen, Changhua ; Sun, Jun ; Song, Zhimin

Author_Institution

Sci. & Technol. on High Power Microwave Lab., Northwest Inst. of Nucl. Technol., Xi´´an, China

Volume

60

Issue

1

fYear

2013

fDate

Jan. 2013

Firstpage

494

Lastpage

497

Abstract

Frequency agility is necessary for many applications of high-power microwave sources. To expand the frequency-tuning bandwidth of the backward-wave oscillator (BWO) with an extracting cavity while holding high efficiency and less amplitude fluctuation, a dual-mechanical tuning method by changing the drift length and the cavity length in synchronism is investigated in this paper. A bandwidth of about 750 MHz around 9.6 GHz with power efficiency of over 33% and amplitude fluctuation of about -1 dB is obtained. The total adjusted length is 24 mm. The simulation results demonstrated the frequency-tuning ability of the relativistic BWO with multigigawatt output power.

Keywords

backward wave oscillators; circuit tuning; fluctuations; microwave oscillators; amplitude fluctuation; cavity length; drift length; dual-mechanical tuning; extracting cavity; frequency agility; frequency-tuning ability; high-power microwave sources; multigigawatt output power; relativistic backward-wave oscillator; Cavity resonators; Microwave oscillators; Microwave theory and techniques; Plasmas; Resonant frequency; Tuning; Backward-wave oscillator (BWO); frequency tuning; high-power microwave (HPM);

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/TED.2012.2230400

Filename

6375801