The exotic wave phenomena in metastructures and their wide applications are one of the
most researched subjects in electromagnetic waves and photonics, from radio frequencies …

We study the rise of exceptional points of degeneracy (EPD) in various distinct circuit
configurations such as gyrator-based coupled resonators, coupled resonators with PT …

We demonstrate that a circuit comprising two unstable LC resonators coupled via a gyrator
supports an exceptional point of degeneracy (EPD) with purely real eigenfrequency. Each of …

We investigate how a single resonator with a time-modulated component extracts power
from an external ambient source. The collected power is largely dependent on the precise …

A simple and fast model for numerically calculating small-signal gain in serpentine
waveguide traveling-wave tubes (TWTs) is described. In the framework of the Pierce model …

Exceptional points (EPs) of non-Hermitian systems are gaining more and more attention due
to their important applications in unidirectional transmitters, sensors, etc. However …

A scheme to characterize and model the dynamics of the electron beam–electromagnetic
power exchange along a traveling-wave tube (TWT) is proposed. The method is based on …

We introduce a practical method for modeling the small-signal behavior of dispersive and
inhomogeneous helix-type traveling-wave tube (TWT) amplifiers based on a generalization …

An effective numerical method for accurate extraction of the properties of slow-wave
structures (SWSs) with the full-wave simulator is proposed in this article. With the short-open …

We propose a scheme to calculate the reduced plasma frequency of a cylindrical-shaped
electron beam flowing inside of a cylindrical tunnel, based on results obtained from particle …