A relativistic backward-wave oscillator with frequency-selectable across X-and Ku-bands

作者：Ge, Xingjun^*; Li, Mingzhu; He, Juntao; Zhang, Jun; Zhu, Danni

来源：Physics of Plasmas, 2017, 24(3): 033120.

DOI：10.1063/1.4979184

The mechanism and realization of a relativistic backward-wave oscillator (RBWO) with frequency-selectable across X- and Ku-bands are presented. Both the transverse and the longitudinal mode selections contribute to the frequency-selectable across different bands. The transverse mode selection is achieved using the property of "surface wave" of the slow-wave structures to excite the coaxial TM01 mode (Ku-band) or the hollow TM01 mode (X-band) without exciting the higher TM modes. The longitudinal mode selection is achieved by the introduction of a coaxial extractor, which contributes to the compact structure and the restraints of the longitudinal mode competitions. In simulation, a Ku-band microwave with a frequency of 12.6 GHz and an X-band microwave with a frequency of 10.6 GHz are radiated when the inner-conductor length is 10.2 cm and 0 cm, respectively. The output power of both bands is above 2GW. This technical route of RBWO with frequency-selectable across different bands is feasible and provide a guide to design other types of frequency tunable high power microwave sources operating at high frequency bands. Published by AIP Publishing.

• 出版日期2017-3
• 单位中国人民解放军国防科学技术大学