22 citations · 46 across the 10 of their papers we have counts for
10 papers
Double-Corrugated Degenerate Band-Edge Oscillator Driven by an Electron Beam
Miguel Saavedra-Melo, Robert Marosi, Nelson Castro +2
The properties of a degenerate band-edge (DBE) oscillator based on the synchronous interaction between a linear electron beam synchronized with four degenerate electromagnetic mode…
Wideband Glide-Symmetric Slow-Wave Structure for Millimeter-Wave Sheet Beam TWTs
Robert Marosi, Muhammed Zuboraj, Filippo Capolino
We introduce a slow-wave structure (SWS) for a millimeter-wave sheet-beam traveling-wave tube (TWT) with wide bandwidth. The wideband and stable operation is enabled through the to…
Wideband Glide-Symmetric Double-Corrugated Gap-Waveguide Traveling-Wave Tube for Millimeter Waves
Miguel Saavedra-Melo, Nelson Castro, Robert Marosi +2
We explore the use of glide symmetry (GS) and electromagnetic bandgap (EBG) technology in a glide-symmetric double corrugated gap waveguide (GSDC-GW) slow wave structure (SWS) for…
Small-Signal Model for Inhomogeneous Helix Traveling-Wave Tubes using Transfer Matrices
Robert Marosi, Kasra Rouhi, Tarek Mealy +2
Abstract We introduce a practical method for modeling the small-signal behavior of frequency-dispersive and inhomogeneous helix-type traveling-wave tube (TWT) amplifiers based on a…
Parametric Modeling of Serpentine Waveguide Traveling Wave Tubes
Kasra Rouhi, Robert Marosi, Tarek Mealy +2
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, we con…
Analytical Solution for Space-Charge Waves in a Two-Stream Cylindrical Electron Beam
Tarek Mealy, Robert Marosi, Kasra Rouhi +1
We present an analytical method to compute the wavenumbers and electric fields of the space-charge-wave eigenmodes supported by a two-stream electron beam, consisting of a solid in…
Reduced Plasma Frequency Calculation Based on Particle-In-Cell Simulations
Tarek Mealy, Robert Marosi, Filippo Capolino
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-…
Three-Way Serpentine Slow-Wave Structures with Stationary Inflection Point and Enhanced Interaction Impedance
Robert Marosi, Tarek Mealy, Alexander Figotin +1
We introduce two novel variants of the serpentine waveguide slow-wave structure (SWS), often utilized in millimeter-wave traveling-wave tubes (TWTs), with an enhanced interaction i…
Third Order Modal Exceptional Degeneracy in Waveguides with Glide-Time Symmetry
Farshad Yazdi, Tarek Mealy, Alireza Nikzamir +2
The dispersion of a three-way waveguide is engineered to exhibit exceptional modal characteristics. Two coupled waveguides with Parity-Time (PT) symmetry have been previously demon…
Exceptional Degeneracies in Traveling Wave Tubes with Dispersive Slow-Wave Structure Including Space-Charge Effect
Kasra Rouhi, Robert Marosi, Tarek Mealy +3
The interaction between a linear electron beam and a guided electromagnetic wave is studied in the contest of exceptional points of degeneracy (EPD) supported by such an interactiv…