Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 28, 2025
Abstract
The
absorption
performance
of
electromagnetic
(EM)
wave
absorbing
materials
deteriorates
sharply
at
large
incident
angles,
particularly
angles
exceeding
50°.
To
overcome
this
challenge,
study
proposes
a
bionic
grooving
all‐cementitious‐dielectric
metastructure
(ACDMS),
yielding
more
than
34.6
GHz
effective
bandwidth
(
EAB
)
over
0°–60°
without
any
agent.
effects
structural
design,
geometric
parameters,
and
on
the
EM
response
are
investigated
by
numerical
simulations
experimental
characterizations.
It
is
found
that
ACDMS
enables
multiple
mechanisms
under
various
including
electric
field
redistribution,
multi‐axis
interference,
surface
excitation,
diffraction/scattering
pathways.
Experimental
results
demonstrate
60°
angle,
even
exceeds
normal
incidence,
achieving
relative
163%,
‐20
dB
(99%
absorption)
33.4
GHz,
mean
reflectivity
−23.4
in
1–40
range.
RCS
simulation
environmental
testing
across
fluctuating
humidity
(40%–80%)
temperature
(10–220
°C)
exposures
underscore
exceptional
potential
for
practical
applications
harsh
conditions.
combination
innovative
mechanisms,
adaptability
convenient
cement‐based
manufacturing
process
establishes
as
promising
candidate
next‐generation
absorbers.
physica status solidi (a),
Journal Year:
2023,
Volume and Issue:
221(4)
Published: Nov. 24, 2023
In
the
era
of
fifth
generation
(5G)
and
Internet
Things
(IoT),
electromagnetic
interference
(EMI)
poses
a
significant
challenge.
The
rapid
growth
wireless
communication
applications
leads
to
increased
(EM)
pollution,
which
can
have
adverse
health
effects.
To
address
this
issue,
absorbers
(EMAs)
play
critical
role
in
eliminating
EMI
reducing
EM
pollution
between
electronic
devices.
focus
is
now
on
developing
diverse
microwave
absorbing
materials
(MAMs)
with
different
structures
cover
wide
range
frequencies
while
remaining
cost‐effective
effective
at
high
angles
incidence
radiation.
This
article
comprehensively
reviews
EMAs,
highlighting
their
design
parameters
importance
achieving
high‐efficiency
absorption.
review
covers
absorber
theory,
structure,
for
various
frequency
ranges,
mechanisms
responsible
dissipating
waves
(EMWs).
Analytical
numerical
methods
modeling
analyzing
EMAs
are
discussed,
along
performance
indicators
testing
methods.
explored,
emerging
research
directions
enhancing
also
highlighted.
Journal of Applied Physics,
Journal Year:
2024,
Volume and Issue:
135(6)
Published: Feb. 13, 2024
The
graphene-based
electromagnetic
wave
absorption
materials
have
attracted
extensive
attention
due
to
their
lightweight,
strong
absorption,
broadband,
and
thin
thickness.
In
this
work,
graphene
hollow
microspheres
anchored
with
FeNi-coupled
nanocrystal
(GHMs@FeNi3/NiFe2O4)
were
synthesized
using
water-in-oil
(W/O)
emulsification
high-temperature
calcination.
GHMs@FeNi3/NiFe2O4
a
homogeneous
spherical
morphology
pronounced
structure,
the
nanocrystals
are
homogeneously
embedded
in
spongy
shell
assembled
by
rGO
nanosheets.
Owing
optimized
impedance
matching
enhanced
attenuation,
composites
exhibit
outstanding
microwave
ability,
particularly
Ku
band.
minimum
reflection
loss
(RLmin)
value
can
reach
−58.96
dB
at
14.43
GHz
thickness
of
2.25
mm,
effective
bandwidth
(lower
than
−10
dB)
is
up
6.29
(11.71–18
GHz)
covering
whole
We
believe
that
our
work
provides
an
idea
for
design
high-performance
absorbing
composite
materials.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 28, 2025
Abstract
The
absorption
performance
of
electromagnetic
(EM)
wave
absorbing
materials
deteriorates
sharply
at
large
incident
angles,
particularly
angles
exceeding
50°.
To
overcome
this
challenge,
study
proposes
a
bionic
grooving
all‐cementitious‐dielectric
metastructure
(ACDMS),
yielding
more
than
34.6
GHz
effective
bandwidth
(
EAB
)
over
0°–60°
without
any
agent.
effects
structural
design,
geometric
parameters,
and
on
the
EM
response
are
investigated
by
numerical
simulations
experimental
characterizations.
It
is
found
that
ACDMS
enables
multiple
mechanisms
under
various
including
electric
field
redistribution,
multi‐axis
interference,
surface
excitation,
diffraction/scattering
pathways.
Experimental
results
demonstrate
60°
angle,
even
exceeds
normal
incidence,
achieving
relative
163%,
‐20
dB
(99%
absorption)
33.4
GHz,
mean
reflectivity
−23.4
in
1–40
range.
RCS
simulation
environmental
testing
across
fluctuating
humidity
(40%–80%)
temperature
(10–220
°C)
exposures
underscore
exceptional
potential
for
practical
applications
harsh
conditions.
combination
innovative
mechanisms,
adaptability
convenient
cement‐based
manufacturing
process
establishes
as
promising
candidate
next‐generation
absorbers.
