High-Temperature Stealth Across Multi-Infrared and Microwave Bands with Efficient Radiative Thermal Management
Nano-Micro Letters,
Год журнала:
2025,
Номер
17(1)
Опубликована: Март 24, 2025
Abstract
High-temperature
stealth
is
vital
for
enhancing
the
concealment,
survivability,
and
longevity
of
critical
assets.
However,
achieving
across
multiple
infrared
bands—particularly
in
short-wave
(SWIR)
band—along
with
microwave
efficient
thermal
management
at
high
temperatures,
remains
a
significant
challenge.
Here,
we
propose
strategy
that
integrates
an
IR-selective
emitter
(Mo/Si
multilayer
films)
metasurface
(TiB
2
–Al
O
3
–TiB
)
to
enable
multi-infrared
band
stealth,
encompassing
mid-wave
(MWIR),
long-wave
(LWIR),
SWIR
bands,
(X-band)
700
°C,
simultaneous
radiative
cooling
non-atmospheric
window
(5–8
μm).
At
device
exhibits
low
emissivity
0.38/0.44/0.60
MWIR/LWIR/SWIR
reflection
loss
below
−
dB
X-band
(9.6–12
GHz),
0.82
5–8
μm
range—corresponding
power
9.57
kW
m
−2
.
Moreover,
under
input
17.3
—equivalent
aerodynamic
heating
Mach
2.2—the
demonstrates
temperature
reduction
72.4
°C
compared
conventional
low-emissivity
molybdenum
surface
temperatures.
This
work
provides
comprehensive
guidance
on
high-temperature
design,
far-reaching
implications
multispectral
information
processing
extreme
environments.
Язык: Английский
Synthesis of a Leaf-Like Co/C Nanosheet for Efficient Microwave Absorption
Langmuir,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 24, 2025
Elaborate
engineering
of
the
microstructure
electromagnetic
(EM)
absorption
materials
affords
infinite
potential
for
achieving
superior
EM
wave
performance.
In
this
work,
a
leaf-like
Co/C
nanosheet
was
rationally
fabricated
by
facile
pyrolysis
CoZn-based
zeolitic
imidazolate
framework-L
(Co/Zn-ZIF-L)
precursor.
Herein,
Co
nanoparticles
(NPs)
are
uniformly
confined
in
porous
carbon
matrix,
forming
attractive
heterostructures.
A
suitable
2D
morphology
and
binary
components
endow
composite
with
impedance
matching
synergetic
losses
excellent
microwave
radar
stealth
When
filler
content
is
as
low
25
wt
%,
strong
intensity
−47.6
dB
reached
at
thickness
2.1
mm,
broad
effective
bandwidth
4.9
GHz
achieved
only
1.6
mm.
At
detection
theta
0°,
maximum
cross-sectional
(RCS)
reduction
value
reaches
17.9
dB·m2.
Hence,
it
expected
that
exhibits
significant
advantages
field
stealth,
which
paves
way
future
exploration
high-performance
materials.
Язык: Английский
Transparent and Tunable Radar‐Infrared Bi‐Stealth Metamaterial Based on Water and Metallic Mesh for Optical Window Applications
Advanced Materials Technologies,
Год журнала:
2025,
Номер
unknown
Опубликована: Апрель 15, 2025
Abstract
In
this
paper,
we
present
a
transparent
and
tunable
radar‐infrared
bi‐stealth
metamaterial
consisting
of
an
infrared
shielding
layer
(IRSL),
radar‐absorbing
(RAL),
water
substrate,
metal
meshed
reflective
backplane.
The
IRSL
consists
array
indium
tin
oxide
square
patches,
reducing
emissivity
transmitting
microwaves.
the
RAL,
ultrathin
metallic
meshes
with
different
periods
are
integrated
into
one
to
broaden
microwave
absorption
bandwidth.
Moreover,
substrate
facilitates
tunability
performance
via
its
fluidity.
Experimental
measurements
simulations
indicate
that
fabricated
sample
can
achieve
over
90%
within
wide
frequency
range
3.6–15.8
GHz
relative
bandwidth
126%.
band
be
further
switched
3.6–5.9
11.2–13.8
by
simply
adjusting
thickness.
addition,
low
≈0.37
is
achieved
in
atmospheric
window
(8–14
µm),
while
measured
average
optical
transmittance
reaches
65.5%
at
400–800
nm.
main
advantage
proposed
compatibility
across
visible,
infrared,
regions
simultaneous
realization
high
transparency,
reduced
emissivity,
broadband
switchable
absorption.
Given
these
multiple
functionalities
superior
performances,
has
great
application
potential
aircraft
windows,
glass
curtain
walls
buildings,
counter‐surveillance
devices,
wireless
communication
systems.
Язык: Английский
A hybrid metamaterial with broadband radar cross section reduction and low infrared emissivity for multispectral stealth
Journal of Applied Physics,
Год журнала:
2025,
Номер
137(15)
Опубликована: Апрель 17, 2025
Metamaterials
exhibiting
exotic
electromagnetic
properties
present
new
opportunities
for
countering
multi-spectrum
detection
technologies.
In
this
paper,
a
hybrid
metamaterial
with
broadband
radar
cross
section
reduction
(RCS)
and
low
infrared
(IR)
emissivity
multispectral
stealth
was
proposed.
This
consists
of
two-dimensional
random
array
two
meta-atoms,
which
include
magnetic
absorbing
material
layer,
resistive
metasurfaces,
dielectric
foams,
an
layer
(IRSL).
Such
meta-atoms
are
designed
to
be
lossy
possess
specific
reflection
phase
difference,
enabling
the
proposed
integrate
absorption
cancelation
mechanisms
RCS
reduction.
The
IRSL
periodically
arranged
high-filling-ratio
indium
tin
oxide
patches
that
exhibit
high
reflectivity
IR
waves
while
allowing
transmittance
microwaves.
Based
on
equivalent
circuit
model,
we
parametrically
modeled
introduced
genetic
algorithms
optimization.
Ultimately,
optimized
achieves
greater
than
10
dB
from
2.15
18
GHz
less
0.2
in
3–14
μm
band,
total
thickness
6
mm.
concept
design
presented
paper
promising
realization
application
materials.
Язык: Английский
Multifunctional Broadband Electromagnetic Wave Absorption Through Structural Engineering of Hierarchical Aerogel-Honeycomb Metacomposites
Опубликована: Янв. 1, 2025
Язык: Английский
Generalized Phase Tailoring of Arbitrary Orthogonal Polarizations in Meta‐Structure with High‐Order Geometric Symmetry
Advanced Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 14, 2025
Abstract
Symmetry,
a
core
principle
of
aesthetics,
plays
crucial
role
in
both
physics
and
mathematics.
Recent
investigations
into
high‐symmetry
meta‐structures
(C
m
,
≥
3)
have
revealed
intriguing
concepts
phenomena
optics
materials
science.
However,
increasing
symmetry
introduces
challenges
tailoring
anisotropy,
limiting
the
potential
highly
symmetric
structures
for
functional
wavefront
engineering.
While
nonlinear
geometric
Berry
phase
generalized
enabled
circular
polarization
control
C
(
meta‐structures,
these
approaches
are
inherently
spin‐dependent
restricted
to
states.
Here,
shape
tailoring,
including
modifications
unit
cell
dimension
meta‐structure
parameters
is
presented,
effectively
enhance
anisotropy
capabilities
meta‐structures.
By
further
incorporating
phase,
independent
arbitrary
orthogonal
states
achieved,
validated
numerically
experimentally.
This
framework
enhances
capacity
has
substantial
integrating
flexible
functions
with
high‐symmetry‐driven
exotic
phenomena.
Moreover,
this
approach
offers
inspiration
applications
fields
such
as
condensed
matter
science,
i.e.,
lattice.
Язык: Английский
Generalized Ambiguity Function for Bistatic FDA Radar Joint Velocity, Range, and Angle Parameters
Remote Sensing,
Год журнала:
2025,
Номер
17(10), С. 1784 - 1784
Опубликована: Май 20, 2025
The
bistatic
frequency
diverse
array
(FDA)
radar
system
is
designed
to
exploit
the
beam
autoscanning
of
FDA
radar,
providing
a
novel
solution
address
spatial
synchronization
challenges
in
architecture,
unleashing
radar’s
advantage
low-observable
target
detection,
main-lobe
jamming
(MLJ)
suppression,
etc.
To
lay
theoretical
foundation
for
subsequent
research
on
systems,
this
study
develops
generalized
ambiguity
function
(GAF)
framework,
jointly
characterizing
velocity,
range,
and
angular
parameters,
which
can
provide
reference
transmitted
signal
optimization
geometric
configuration
design.
This
paper
derives
mathematical
model
system’s
GAF
validates
that
its
structure
not
only
depends
but
also
exhibits
strong
dependency,
where
baseline
length
position
reshape
triangle
through
numerical
simulations.
Язык: Английский
A Multi‐Polarization Multi‐Band Reconfigurable Cloaking‐Illusion Metasurface
Advanced Optical Materials,
Год журнала:
2024,
Номер
unknown
Опубликована: Дек. 16, 2024
Abstract
A
switchable
conformal‐skin
cloak
for
multi‐polarization
cloaking‐illusion
is
presented.
Multi‐polarization
electromagnetic
of
the
Poincaré
sphere
analyzed
and
realized
based
on
generalized
Snell's
law
Pancharatnam–Berry
(PB)
phase
theory.
The
achieves
adaptive
with
linearly
polarized
in
X‐band
(7.5–9.5
GHz)
circularly
K‐band(16–20
GHz),
respectively.
To
achieve
a
reconfigurable
carpet
cloak,
structured
water
acting
as
phase‐change
material
introduced
into
cell
structure
design,
enabling
reflection
phases
during
excitation.
This
first
time
that
used
instead
to
create
phase‐shifting
invisibility
cloak.
Conformal
integration
samples
are
fabricated
tested
by
combining
3D‐printing
technology
PCB
fabrication
technology,
simulation
results
agreement
experimental
results.
method
realizes
cloaking‐illusion.
impact
surface
properties
reduced
using
3D
printing.
approach
adaptable
terahertz
optical
bands,
providing
crucial
guidance
integrated
creation
arbitrary
shapes.
Язык: Английский