Theory and new amplification regime in periodic multimodal slow wave structures with degeneracy interacting with an electron beam

MAK Othman, VA Tamma… - IEEE Transactions on …, 2016 - ieeexplore.ieee.org
We present the theory of a new amplification regime in traveling wave tubes (TWTs)
composed of a slow wave periodic structure that supports multiple electromagnetic modes …

Elastic coiling-up-space metamaterial

GJ Jeon, JH Oh - Physical Review Applied, 2021 - APS
Coiling up space is a metamaterial technique that utilizes a subwavelength labyrinthine
structure to achieve a high refractive index. Despite the various advances in acoustics, the …

Investigation of high-power ring-bar traveling wave tube with metamaterial absorber

L Yang, M Ma, Y Xie, H Fan, Z Chen… - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
A rectangular split resonant ring (RSRR) metamaterial absorber (MMA) was proposed to
suppress backward wave oscillation (BWO) in a ring-bar traveling wave tube (RB-TWT). The …

Experimental validation of phase velocity and interaction impedance of meander-line slow-wave structures for space traveling-wave tubes

JM Socuéllamos, R Dionisio, R Letizia… - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
Meander lines are promising slow-wave structures (SWSs) for millimeter-wave traveling-
wave tubes (TWTs) due to low-cost manufacture, low-voltage operation, and high interaction …

Recent discrete model for small-signal analysis of traveling-wave tubes

DFG Minenna, AG Terentyuk, F André, Y Elskens… - Physica …, 2019 - iopscience.iop.org
The numerical simulations of the wave-particle interaction, as it occurs in particular in
traveling-wave tubes, require new tools especially to investigate near the band edges of …

Efficiency enhancement and harmonic reduction of wideband helix traveling-wave tubes with positive phase velocity tapering

SS Jung, AV Soukhov, B Jia, GS Park… - Japanese journal of …, 2002 - iopscience.iop.org
Using numerical simulations, a wideband (> 1.5 octave) vane loaded helix traveling-wave
tube (TWT) was studied, the output section of which is provided with apositively'phase …

Propagation of electromagnetic waves guided by perfectly conducting model of a tape helix supported by dielectric rods

G Naveen Babu, RJ Stanislaus - IET Microwaves, Antennas & …, 2016 - Wiley Online Library
The homogeneous boundary value problem existing in the electromagnetic wave
propagation in a dielectric‐loaded perfectly conducting tape helix with infinitesimal tape …

Characteristic impedance and capacitance analysis of Blumlein type pulse forming line of accelerator based on tape helix

Y Zhang, J Liu, X Fan, H Zhang, S Wang… - Review of Scientific …, 2011 - pubs.aip.org
In this paper, the electromagnetic dispersion theory and the classic telegraph equations
were combined to calculate the important parameters of the helical Blumlein pulse forming …

Accurate tape analysis of the attenuator-coated helical slow-wave structure

Z Duan, Y Gong, W Wang, BN Basu… - IEEE transactions on …, 2006 - ieeexplore.ieee.org
The tape-helix model is used to analyze the helical slow-wave structure considering the
helix turns to be effectively shorted by the resistive attenuator coating on dielectric helix …

翼片加载螺旋线慢波结构的螺旋带模型

张勇, 莫元龙, 李建清, 周晓岚 - 强激光与粒子束, 2002 - hplpb.com.cn
翼片加载螺旋线慢波结构广泛应用于大功率, 宽频带行波管中. 建立了翼片加载螺旋线慢波结构
的螺旋带模型, 得到了实用的色散方程, 耦合阻抗和衰减常数的表达式. 利用导出的方程对实际行 …