Optics Express,
Journal Year:
2024,
Volume and Issue:
33(2), P. 2047 - 2047
Published: Dec. 30, 2024
A
reconfigurable
holographic
metasurface
(HM)
with
multifunctional
modulation
of
radiation
and
scattering
for
conformal
applications
is
designed
in
this
paper.
Based
on
optical
holography
theory,
a
mechanism
proposed,
the
surface
impedance
distribution
HM
derived.
To
illustrate
mechanism,
used
to
demonstrate
series
functions,
its
property
enabling
dynamic
beam
control.
In
mode,
scanning
wide
angle
from
−50°
50°
achieved.
specific
responses
are
generated
under
different
incident
angles,
including
steering
oblique
incidence
within
±60°,
multi-beam
splitting
±60°
normal
incidence,
diffuse
reflection.
Low
radar
cross
section
(RCS)
exhibited
over
frequency
band
7.2
25
GHz.
The
shows
high
adaptability
cylindrical
platforms,
insensitivity
stability
deflection
which
provides
an
innovative
technical
approach
information
transmission
stealth
devices.
Journal of Applied Physics,
Journal Year:
2025,
Volume and Issue:
137(1)
Published: Jan. 3, 2025
In
this
paper,
we
propose
a
microstrip
antenna
that
incorporates
dual-polarization
and
bidirectional
focusing
metasurface
(MS)
for
achieving
high-gain
transmission
in
circular
polarization
(CP)
reflection
linear
(LP)
radiation,
respectively.
Initially,
design
MS
enables
independent
manipulation
of
the
transmitted
CP
wave
at
lower
frequency
8.2
GHz
reflected
LP
higher
16.2
GHz,
The
unit-cell
comprises
combination
an
outer
bilayered
split-ring
resonator,
along
with
inner
arc-shaped
disk
resonators,
all
separated
by
dielectric
substrate.
Subsequently,
coaxial-fed
laminated
is
designed
capable
realizing
radiation
gain
approximately
4.9
dBic
4.8
dBi,
To
improve
performance,
construct
integrated
MS.
This
configuration
to
achieve
peak
13.1
14.6
dBi
relative
bandwidth
6.79%
(at
GHz)
13.54%
reflective
wave,
evaluate
practicality
our
proposed
design,
fabricated
measured
antenna,
both
without
results
obtained
from
these
measurements
closely
align
simulations,
thereby
validating
effectiveness
antenna.
provides
practical
solution
facilitating
high-speed
information
communication
systems.
Electronics Letters,
Journal Year:
2025,
Volume and Issue:
61(1)
Published: Jan. 1, 2025
Abstract
The
use
of
the
sub‐terahertz
(THz)
band
is
a
promising
candidate
to
cope
with
ever‐increasing
traffic
in
wireless
access.
Since
transmission
range
sub‐THz
reduced
due
its
large
propagation
loss,
received
power
needs
be
enhanced
using
beamforming
technologies.
authors
focused
on
Bessel
beams
(BBs),
which
show
high
performance
up
certain
distance,
and
evaluated
their
experimentally.
experiments
were
carried
out
at
140
GHz
small
(15
cm
diameter)
dielectric
metasurface
lenses.
When
these
lenses,
was
increased
by
15
11
dB,
respectively,
for
distances
70
greater
than
that
conventional
collimated
beam.
Engineering Reports,
Journal Year:
2025,
Volume and Issue:
7(3)
Published: March 1, 2025
ABSTRACT
Coding
metasurfaces
have
the
advantage
of
controlling
electromagnetic
waves
by
designing
digital
states
unit
elements.
This
mechanism
can
be
conveniently
integrated
into
electronic
information
systems,
hence,
coding
been
studied
extensively
in
fields
radar
and
communication.
However,
full‐duplex
full‐polarization,
as
two
critical
issues
system‐level
applications,
rarely
addressed
existing
researches
metasurfaces.
Here
we
propose
a
flexible
method
to
design
binary
metasurface
that
possesses
functions
polarization‐dependent
full‐polarization
receiving.
Specifically,
designed
is
shared
different
feeding
sources,
sources
independently
transmit
or
receive
orthogonally
polarized
through
metasurface,
hence
forming
full‐duplex;
on
other
hand,
orthogonal
components
incoming
received
respectively
Both
simulations
measurements
validated
thus
showing
potential
presented
sensing,
wireless
communication,
systems.
Frequenz,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 17, 2025
Abstract
This
paper
presents
a
compact
broadband
absorber
designed
for
sensing
applications
at
terahertz
frequencies.
The
proposed
design
includes
dielectric
material,
metallic
ground
plane
made
of
copper,
and
graphene-based
elliptical
slot-loading
rectangular
resonator.
unit
cell
the
measures
dimensions
6
μm
×
μm.
demonstrates
remarkable
absorption
characteristics,
with
over
90
%
across
wide
frequency
spectrum
0–18
THz.
At
12.2
THz,
performance
is
nearly
perfect,
an
rate
99.9
%.
Further,
has
symmetric
design,
facilitating
it
to
be
insensitive
polarization.
It
possesses
stable
characteristics
both
Transverse-Electric
(TE)
Transverse-Magnetic
(TM)
waves
incidence
angle
(
θ
)
≥
40°.
Additionally,
suggested
analysed
regard
effects
various
analyte
materials
as
well
modifications
in
graphene
characteristics.
outperforms
previously
reported
THz
absorbers
terms
relative
bandwidth,
peak,
oblique
stability,
overall
volume.
Sensors,
Journal Year:
2025,
Volume and Issue:
25(2), P. 429 - 429
Published: Jan. 13, 2025
This
research
presents
an
innovative
polarization-insensitive
metasurface
(MS)
harvester
designed
for
energy
harvesting
applications
at
5
GHz,
capable
of
operating
efficiently
over
wide
reception
angles.
The
proposed
MS
features
a
novel
wheel-shaped
resonator
array
whose
symmetrical
structure
ensures
insensitivity
to
the
polarization
incident
electromagnetic
(EM)
waves,
enabling
efficient
absorption
and
minimizing
reflections.
Unlike
conventional
designs,
achieves
near-unity
efficiency,
exceeds
94%
under
normal
incidence,
maintains
superior
performance
across
various
angles
TE
TM
polarizations.
To
validate
design,
×
5-unit
cell
was
fabricated
experimentally
tested,
demonstrating
excellent
agreement
between
simulation
measurement
results.
work
significantly
advances
metasurface-based
by
combining
insensitivity,
wide-angle
high
absorption,
making
it
compelling
solution
powering
wireless
sensor
networks
in
next-generation
applications.
