An L-band coaxial relativistic backward wave oscillator with mechanical frequency tunability

Xingjun Ge; Huihuang Zhong; Baoliang Qian; Jun Zhang; Liang Gao; Zhenxing Jin; Yuwei Fan; Jianhua Yang
September 2010
Applied Physics Letters;9/6/2010, Vol. 97 Issue 10, p101503
Academic Journal
The initial experimental results of an L-band coaxial relativistic backward wave oscillator with mechanical frequency tunability are presented. The key effects of the inner-conductor contributing to the mechanical frequency tunability are investigated theoretically and experimentally. In the experiments, the L-band microwave with frequency of 1.58 GHz is radiated when the inner-conductor radius is 1.5 cm. Meanwhile, the S-band microwave with frequency of 2.31 GHz is generated after removing the inner-conductor. In addition, the frequency tuning within 4% is realized by mechanically altering the radius of the inner-conductor at a half power level.


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