Zobrazeno 1 - 10
of 2 615
pro vyhledávání: '"Capolino A"'
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 traveling wave tube (TWT) applications. Notably, this GS structure pro
Externí odkaz:
http://arxiv.org/abs/2409.05238
Autor:
Itzhak, Gal Ben, Saavedra-Melo, Miguel, Bradshaw, Benjamin, Ayanoglu, Ender, Capolino, Filippo, Swindlehurst, A. Lee
A Reflective Intelligent Surface (RIS) consists of many small reflective elements whose reflection properties can be adjusted to change the wireless propagation environment. Envisioned implementations require that each RIS element be connected to a c
Externí odkaz:
http://arxiv.org/abs/2409.01760
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 of the one-dimensional Pierce model. Our model is applicable to both sing
Externí odkaz:
http://arxiv.org/abs/2405.07956
Materials with Berry curvature dipoles (BDs) support a non-Hermitian electro-optic (EO) effect that is investigated here for lasing at terahertz (THz) frequencies. Such a system is here conceived as a stack of low-symmetry 2D materials. We show that
Externí odkaz:
http://arxiv.org/abs/2312.15142
An exceptional point of degeneracy (EPD) occurs when both the eigenvalues and the corresponding eigenvectors of a square matrix coincide and the matrix has a nontrivial Jordan block structure. It is not easy to achieve an EPD exactly. In our prior st
Externí odkaz:
http://arxiv.org/abs/2312.06953
Autor:
Nikzamir, Alireza, Capolino, Filippo
An oscillator array prefers to operate at an exceptional point of degeneracy (EPD) occurring in a waveguide periodically loaded with discrete nonlinear gain and radiating elements. The system maintains a steady-state degenerate mode of oscillation at
Externí odkaz:
http://arxiv.org/abs/2308.04562
Autor:
Abramovich, Kessem Zamir, Furman, Nathaniel, Herrero-Parareda, Albert, Capolino, Filippo, Scheuer, Jacob
The frozen mode regime is a unique slow-light scenario in periodic structures, where the flat-bands (zero group velocity) are associated with the formation of high-order stationary points (aka exceptional points). The formation of exceptional points
Externí odkaz:
http://arxiv.org/abs/2308.03562
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 consider one-dimensional electron flow along a dispersive single-mode slo
Externí odkaz:
http://arxiv.org/abs/2308.03786
We investigate the optical properties of the azimuthally-radially polarized beam (ARPB), a superposition of an azimuthally polarized beam and a radially polarized beam, which can be tuned to exhibit maximum chirality at a given energy density. This c
Externí odkaz:
http://arxiv.org/abs/2308.02586
We investigate how a single resonator with a time-modulated component extracts power from an external ambient source. However, the collected power is largely dependent on the precise choice of the modulation signal frequency. We focus on the power ab
Externí odkaz:
http://arxiv.org/abs/2303.10519