Dispersion characteristics and electromagnetic properties of semicircularly corrugated slow‐wave structure for backward‐wave oscillators

2018 ◽  
Vol 32 (2) ◽  
pp. e2528
Author(s):  
Md. Rasheduzzaman Al‐Amin ◽  
Md. Ruhul Amin ◽  
Rakibul Hasan Sagor
Keyword(s):  
Slow Wave ◽  
Wave Structure ◽  
Slow Wave Structure ◽  
Electromagnetic Properties ◽  
Dispersion Characteristics ◽  
Backward Wave

Electromagnetic Properties of a Trapezoidally Corrugated Slow Wave Structure for Backward Wave Oscillators

2014 ◽  
Vol 42 (6) ◽  
pp. 1495-1501 ◽  
Author(s):  
Md. Ruhul Amin ◽  
Kazuo Ogura ◽  
Junpei Kojima ◽  
Rakibul Hasan Sagor
Keyword(s):  
Slow Wave ◽  
Wave Structure ◽  
Slow Wave Structure ◽  
Electromagnetic Properties ◽  
Backward Wave

scholarly journals Design and efficient operation of a coaxial RBWO

2013 ◽  
Vol 31 (2) ◽  
pp. 321-331 ◽  
Author(s):  
Y. Teng ◽  
C.H. Chen ◽  
H. Shao ◽  
J. Sun ◽  
Z.M. Song ◽  
...  
Keyword(s):  
Electron Beam ◽  
Slow Wave ◽  
Wave Structure ◽  
Slow Wave Structure ◽  
Power Capacity ◽  
Efficient Operation ◽  
Backward Wave Oscillator ◽  
Wave Oscillator ◽  
Backward Wave ◽  
Output Efficiency

AbstractCoaxial relativistic backward wave oscillator with the rippled inner conductor not only increases the output efficiency but also results in the serious phenomenon of pulse shortening in experiments. Our research indicates that the two main mechanisms leading to the pulse shortening are the electron beam interruption and combining effects of the explosive field electron emission and the secondary electron multipactor on the surface of the slow-wave structure. In order to enhance its power capacity the electrodynamic structure is modified by detailed analysis of the field distribution in the coaxial slow-wave structure. The appropriate resonant reflector and the electron collector are developed for the application of the coaxial relativistic backward wave oscillator. A series of surface treatment is applied to enhance the power capacity of the coaxial RBWO. In the experiment, the microwave pulse duration is increased from less than 10 ns to 20 ns, and the output efficiency is enhanced from less than 20% to 34% employing the electron beam pulse of the full width at half maximum 28 ns. The peak power of 1.01 GW at the frequency of 7.4 GHz is achieved. It is found that the output efficiency of the coaxial RBWO is likely to be advanced if its power capacity can be boosted further.

Sign in / Sign up

Export Citation Format

Share Document