Polk County Enterprise (Livingston, Tex.), Vol. 132, No. 91, Ed. 1 Thursday, November 13, 2014 Page: 9 of 38
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I
Thursday, November 13,2014
POLK COUNTY ENTERPRISE
Page IB
Device could transform communication
UT group develops new radio wave circulator
AUSTIN — Research-
ers at the Cockrell School
of Engineering at The Uni-
versity of Texas at Austin
have achieved a milestone
in modem wireless and cel-
lular telecommunications,
creating a radically smaller,
more efficient radio wave cir-
culator that could be used in
cellphones and other wireless
devices, as reported in the lat-
est issue of Nature Physics.
The new circulator has the
potential to double the useful
bandwidth in wireless com-
munications by enabling full-
duplex functionality, meaning
devices can transmit and
receive signals on the same
frequency band at the same
time.
The key innovation is the
creation of a magnetic-free
radio wave circulator.
Since the advent of wire-
less technology 60 years ago,
magnetic-based circulators
have been in principle able
to provide two-way com-
munications on the same fre-
quency channel, but they are
not widely adopted because
of the large size, weight and
cost associated with using
magnets and magnetic mate-
rials.
Freed from a reliance on
magnetic effects, the new
circulator has a much smaller
footprint while also using less
expensive and more common
materials. These cost and
size efficiencies could lead to
the integration of circulators
within cellphones and other
microelectronic systems, re-
sulting in substantially faster
downloads, fewer dropped
calls and significantly clearer
communications.
The team of researchers,
led by Associate Professor
Andrea Alu, has developed
a prototype circulator that is
two centimeters in size —
more than 75 times smaller
than the wavelength of op-
eration. The circulator may
be further scaled down to
as small as a few microns,
according to the research-
ers. The design is based on
materials widely used in inte-
grated circuits such as gold,
copper and silicon, making it
easier to integrate in the cir-
cuit boards of modem com-
munication devices.
“We are changing the par-
adigm with which isolation
and two-way transmission on
the same frequency channel
can be achieved. We have
built a circulator that does not
need magnets or magnetic
materials,” Alu said.
The researchers’ device
works by mimicking the way
magnetic materials break the
symmetry in wave transmis-
sion between two points in
space, a critical function that
allows magnetic circulators to
selectively route radio waves.
With the new circulator, the
researchers accomplish the
same effect, but they replaced
the magnetic bias with a trav-
eling wave spinning around
the device.
Another unique feature is
Existing radio
wave circulator
Efr Radio wave
circulator
LflF' dP 1
* Magnet-,based
*y it c' ••
• arou#-ba*«<i>w magnet needed
• urge and heavy
• Compact and ItghtvretgW
• RdkiQttopeviiRttgvts
and magnetic materials
• Can be made with common and
mxpensto materials
• Magnets cannot be integrated
into error# boente
iy| i , ’
. Can be integrated Wo circuit
boards el modern communtartton
systems, including cedphones.
Wi-fi and routers
that the new circulator can
be tuned in real time over a
broad range of frequencies,
a major advantage over con-
ventional circulators.
“With this technology,
we can incorporate tunable
nonreciprocal components in
mobile platforms,” said Nich-
olas Estep, lead researcher
and a doctoral student in the
Department of Electrical and
Computer Engineering. “In
doing so, we may pave the
way to simultaneous two-way
communication in the same
frequency band, which can
free up chunks of bandwidth
for more effective use.”
For telecommunications
companies, which pay for
licenses to use frequencies
allotted by the U.S. Federal
Communications Commis-
sion, a more efficient use of
the limited available band-
width means significant cost
advantages.
Additionally, because the
design of the circulator is
scalable and capable of cir-
cuit integration, it can poten-
tially be placed in wireless
devices.
“We envision micron-sized
circulators embedded in
cellphone technology. When
you consider cellphone traffic
during high demand events
such as a football game or a
concert, there are enormous
implications opened by our
technology, including fewer
dropped calls and clearer
communications,” Estep said.
The circulator also could
benefit other industries that
currently use magnetic-based
circulators. For instance, cir-
culators used in phased arrays
and radar systems for aircraft,
ships and satellites can be
extremely heavy and large, so
minimizing the size of these
systems could provide sig-
nificant savings.
“We are also bringing this
paradigm to other areas of
science and technology,” Alu
said. “Our research team is
working on using this con-
cept to protect lasers and to
create integrated nano-pho-
tonic circuits that route light
signals instead of radio waves
in preferred directions.”
This research was sup-
ported by the Defense Threat
Reduction Agency and the
Air Force Office of Scientific
Research.
Dunbar alumni hosts gospel concert
LIVINGSTON - The An-
nual Gospel Musical hosted
by the Dunbar Alumni Asso-
ciation of Livingston will be
held at 6 p.m. on Saturday,
Nov. 15.
This year it will be held
at the Family Life Church,
4362 Highway 59 South in
Livingston.
Praise dancers, gospel
choirs and gospel soloists
will take part in a spirit filled
evening of music and dance.
The musical is part of the
alumni association’s out-
reach program and there is
no admission fee.
The association provides
four $ 1,000 scholarships
each year to descendants
of Dunbar High School
who graduate from the
Livingston, Leggett.
Goodrich or Onalaska school
districts.
Thanks To You We Have Expanded!!
Come See Our New And Larger Store!
Same Location, Just Bigger & Better!
SOMETHING OLD SOMETHING NEW
Fashions • Gifts • and Antiques!
Hwy 190 W. • Onalaska, Tx (Next Door To Stubby’s)
The Latest in Ladies Fashions! • Palazzo Pants * Gauchos • Beautiful Ponchos
Bling Jeans * Maxi Dresses & Skirts • Crocheted Hat Sets for Cold Mornings!
Sweaters * Scarves • Hot Nicole Lee Handbags & Other Beautiful Bags
Beautiful Jewelry • Warm Leggings starting at $5.95! • And So Much More!
We now carry children’s clothes... boys & girls, toddler to size 12
Beautiful Assortment of Baby Clothes • Hand-Crocheted Booties
Diaper Bags • Pre-Wrapped Gift Sets • Baby Blankets & More!
Men’s Caps • Knives • Tools • Toys • Western Art and Animal Figurines, etc • Antiques too!
DO YOUR CHRISTMAS SHOPPING NOW FOR BEST SELECTION! GIFT WRAP $1
VISA, Discover, MCard, Debit & Layaway!
936-646-3400 Open Tues-Fri 10-5:30 Sat 10-5
Thanks from Martha Stubbs & Rhonda Youngblood
for making the past 2 years a great success!
\ l
ENTERPRISE PHOTOS BY BRIAN BESTH
Music time in Livingston
Five-time Grammy winning artist Marty Stuart (above, left) and his band, The
Fabulous Superlatives, took the stage Sunday before as packed house at the
Polk County Commerce Center. At the age of 13, Stuart joined the legendary
Lester Flat’s road band and later toured with Johnny Cash before stepping out
on his own as a solo artist. His latest album, “Saturday Night/Sunday Morn-
ing” was released in September. After their performance. Stuart and his band
signed autographs (below) for the Livingston audience.
mm
Give the
gift of
On&tinasi
Joy to a
child in
need this
holiday.
Please drop off your new or almost new
unwrapped toy donation at the
POLK COUNTY ENTERPRISE Office
100 East Calhoun Street, Livingston.
(936) 327-4357
These toys will be given to the Empty Stocking Program,
sponsored by the Livingston Interagency Council,
a network of social service agencies that provide
various forms of assistance throughout the county. The
Empty Stocking Program is counting on the support
of the community to serve needy families in our area.
Money donations may also be made to the
Empty Stocking Fond at First National Bank,
308 W. Church, Livingston, TX 77351.
For more information about this program call
Angela Figgs at (936) 327-3011,
jd or Peggy Wooten *
W at (936) 328-8240 ext 228 J
lo\ collection Mill continue through December 22.
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Peak, Greg. Polk County Enterprise (Livingston, Tex.), Vol. 132, No. 91, Ed. 1 Thursday, November 13, 2014, newspaper, November 13, 2014; Livingston, Texas. (https://texashistory.unt.edu/ark:/67531/metapth820851/m1/9/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting Livingston Municipal Library.