@Article{YamasakiRossBarrScha:2018:OpGyLi,
author = "Yamasaki, Fernanda S. and Rossi, Jos{\'e} Osvaldo and Barroso,
Joaquim Jos{\'e} and Schamiloglu, Edl",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Tecnologico
de Aeron{\'a}utica (ITA)} and {University of New Mexico}",
title = "Operation of a gyromagnetic line at low and high voltages with
simultaneous axial and azimuthal biases",
journal = "IEEE Transactions on Plasma Science",
year = "2018",
volume = "46",
number = "7",
pages = "2573--2581",
month = "July",
keywords = "Ferrites, gyromagnetism, nonlinear transmission line (NLTL), pulse
shaping circuits, radio frequency (RF) generation.",
abstract = "A great interest has been devoted to the study of nonlinear
transmission lines (NLTLs) for radio frequency (RF) generation
since they have been used with great success in RF generation by
producing a train of oscillatory waves along the line and at its
output. There are two configurations of NLTLs. The first one is a
dispersive line consisting of LC sections with nonlinear
components, and the second one is a continuous ferrite loaded
nondispersive line generally biased by an axial magnetic field,
known as gyromagnetic line. In this paper, the focus of the study
is on the second one, since gyromagnetic lines can operate in a
broader frequency range (0.3-2.0 GHz) with higher conversion
efficiency (20.0%) when compared to lumped NLTLs, generally
limited up to 300 MHz with less than 10.0% of efficiency, because
of their dielectric losses and stray impedances on line structure.
Different models have been used along the years by several authors
with different approaches to study the gyromagnetic phenomenon by
means of numerical simulations based on analytical models to
predict the precession movement of the electron magnetic dipole of
the ferromagnetic material. Thus, the goal of this paper is to
analyze the gyromagnetic NLTL behavior through the effects on the
line operation. The novelty herein is to use two biases
simultaneously to study continuous gyromagnetic NLTLs, focusing on
the pulse rise time compression and RF generation caused by the
precession of the magnetic dipole. An experimental setup is
described and tested for low- and high-voltage operation for a
20-cm gyromagnetic line loaded with NiZn ferrite beads. The
novelty of this paper is to use two biases simultaneously to study
continuous gyromagnetic NLTLs, such techniques can be useful in
the design of continuous lines for RF applications in space and
mobile defense platforms of compact size.",
doi = "10.1109/TPS.2018.2840425",
url = "http://dx.doi.org/10.1109/TPS.2018.2840425",
issn = "0093-3813",
language = "en",
targetfile = "yamasaki_operation.pdf",
urlaccessdate = "27 abr. 2024"
}