A Brief Study on Microwave Fast Wave Tubes | Chapter 10 | Innovations in Science and Technology Vol. 5

 Microwave ovens had a crucial role in the twentieth century. This frequency also sees a lot of application development. Microwave tube advancements have aided numerous growths in the recent past. Based on the RF field phase velocity, microwave tubes can be classed as slow-wave or fast-wave devices. A high-power source and amplifier are necessary for millimetre and sub-millimeter wave applications, which can be obtained by designing fast-wave devices. The interaction of the electron with the RF wave in fast wave tubes differs from slow-wave devices, as will be explained further. A brief history is discussed, as well as the many types of fast-wave tubes and their dispersion relationships.

Author(S) Details

Abhijeet Singh
Applied Science & Humanities (Electronics Engineering) Department, Rajkiya Engineering College, Banda-210201, Uttar Pradesh, India.

Madan Singh Chauhan
Department of Physics, Deen Dayal Upadhyaya Gorakhpur University, Gorakhpur, Uttar Pradesh, India.

Neelam Srivastava
Electronics & Communication Engineering Department, I.E.T., Lucknow, Uttar Pradesh, India.

View Book:- https://stm.bookpi.org/IST-V5/article/view/5705

Research on Stability of Nonlinear TE Surface Waves along the Boundary of Left-Handed Material | Chapter 9 | New Insights into Physical Science Vol. 5

 This communication presents a simulation of the stability characteristics of nonlinear surface waves

propagating along a left-handed substrate (LHM) and a non-linear dielectric cover. The growth rate of
perturbation is computed by solving the dispersion equation of perturbation. We found that the stability of nonlinear surface waves is affected by the frequency dependence of the electric permittivity e h and magnetic permeability mh of the LHM. The spatial evolution of the steady state field amplitude is determined by using computer simulation method. The calculations show that with increasing the
effective refractive index nx at fixed saturation parameter m p , the field distribution is sharpened and
concentrated in the nonlinear medium. The waves are stable of forward and backward behavior. At
higher values of nx , attenuated backward waves are observed.

Author(s) Details
 
Hana Mohammed Mousa
Physics Department, Al Azhar University, Gaza, Gaza Strip, Palestinian Authority.

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