Abstract: The finite-difference time-domain (FDTD) algorithm and the particle-in-cell (PIC) method-based simulation are classic approaches to design and optimize the helix traveling wave tubes (TWTs).

Abstract: Nowadays, there is a strong interest in miniature and high-power vacuum electron devices (VEDs) operating in millimeter and sub-THz bands. VED sources of coherent sub-THz radiation are ...

Resistance bands come in various shapes, materials, and resistance levels, allowing you to personalize your workouts at home. Exercises can be done sitting, standing, or lying down. Resistance bands ...