Tech Briefs Magazine - September 2024 - 29
frequencies, rather than have to employ
separate filters. " Being tunable is going
to be really important, " Olsson added,
" because at these higher frequencies you
may not always have a dedicated block of
spectrum just for commercial use. "
What makes the filter adjustable is a
unique material, " yttrium iron garnet "
(YIG), a blend of yttrium, a rare earth
metal, along with iron and oxygen.
" What's special about YIG is that it propagates
a magnetic spin wave, " said Olsson,
referring to the type of wave created
in magnetic materials when electrons
spin in a synchronized fashion.
When exposed to a magnetic field, the
magnetic spin wave generated by YIG
changes frequency. " By adjusting the
magnetic field, " said Xingyu Du, a doctoral
student in Olsson's lab and the first author
of the paper, " the YIG filter achieves
continuous frequency tuning across an
extremely broad frequency band. "
As a result, the new filter can be tuned
to any frequency between 3.4 GHz and
11.1 GHz, which covers much of the new
territory the FCC has opened up in the
FR3 band.
In addition to being tunable, the new
filter is also tiny - about the same size as
a quarter, in contrast to previous generations
of YIG filters, which resembled
large packs of index cards.
While YIG was discovered in the 1950s,
and YIG filters have existed for decades,
the combination of the novel circuit with
extremely thin YIG films micromachined
in the Singh Center for Nanotechnology
dramatically reduced the new filter's
power consumption and size. " Our filter
is 10 times smaller than current commercial
YIG filters, " said Du.
For more information, contact Holly
Wojcik at hwojcik@seas.upenn.edu;
215-573-4607.
3D Processors May Revolutionize Wireless Communication
Researchers have successfully transitioned from planar to 3D processors, ushering in a new
era of compactness and efficiency in data transmission.
University of Florida, Gainesville, FL
S
cientists at the University of Florida
have pioneered a method for using
semiconductor technology to manufacture
processors that significantly enhance
the efficiency of transmitting
vast amounts of data across the globe.
The innovation, featured on the current
cover of the journal Nature Electronics,
is poised to transform the landscape
of wireless communication at a
time when advances in AI are dramatically
increasing demand.
Traditionally, wireless communication
has relied on planar processors, which,
while effective, are limited by their 2D
structure to operate within a limited portion
of electromagnetic spectrum. The
UF-designed approach leverages the
power of semiconductor technology to
propel wireless communication into a
new dimension - quite literally.
Researchers have successfully transitioned
from planar to 3D processors,
ushering in a new era of compactness
and efficiency in data transmission.
Roozbeh Tabrizian, Ph.D., an Associate
Professor in UF's Department of
Electrical and Computer Engineering,
whose team developed the three-dimensional
processor, said it marks a pivotal
moment in the evolution of wireless
communication as the world becomes
increasingly reliant on seamless connectivity
and real-time data exchange.
" The ability to transmit data more
efficiently and reliably will open doors
to new possibilities, fueling advancements
in areas such as smart cities, reTech
Briefs, September 2024
The false-colored scanning electron microscopy image of a 3D filter created from connecting ferroelectric-gate
fin resonators with different frequencies. (Image: University of Florida)
mote health care, and augmented reality, "
he said.
Currently, data in our cellphones
and tablets are converted into electromagnetic
waves that propagate back
and forth among billions of users.
Much like highway design and traffic
lights ensure traffic flows efficiently
through a city, filters, or spectral processors,
move the data across different
frequencies.
" A city's infrastructure can only handle
a certain level of traffic, and if you
keep increasing the volume of cars, you
have a problem, " Tabrizian said. " We're
starting to reach the maximum amount
of data we can move efficiently. The plawww.techbriefs.com
nar
structure of processors is no longer
practical as they limit us to a very limited
span of frequencies. "
With the advent of AI and autonomous
devices, the increased demand
will require a lot more traffic lights in
the form of filters at numerous different
frequencies to move the data to
where it is intended.
" Think of it like lights on the road
and in the air, " Tabrizian said. " It becomes
a mess. One chip manufactured
for just one frequency doesn't make
sense anymore. "
Tabrizian and his colleagues at the
Herbert Wertheim College of Engineering
use CMOS technology, or comple29
https://www.techbriefs.com
Tech Briefs Magazine - September 2024
Table of Contents for the Digital Edition of Tech Briefs Magazine - September 2024
Tech Briefs Magazine - September 2024 - Intro
Tech Briefs Magazine - September 2024 - Sponsor
Tech Briefs Magazine - September 2024 - Cov1
Tech Briefs Magazine - September 2024 - Cov2
Tech Briefs Magazine - September 2024 - 1
Tech Briefs Magazine - September 2024 - 2
Tech Briefs Magazine - September 2024 - 3
Tech Briefs Magazine - September 2024 - 4
Tech Briefs Magazine - September 2024 - 5
Tech Briefs Magazine - September 2024 - 6
Tech Briefs Magazine - September 2024 - 7
Tech Briefs Magazine - September 2024 - 8
Tech Briefs Magazine - September 2024 - 9
Tech Briefs Magazine - September 2024 - 10
Tech Briefs Magazine - September 2024 - 11
Tech Briefs Magazine - September 2024 - 12
Tech Briefs Magazine - September 2024 - 13
Tech Briefs Magazine - September 2024 - 14
Tech Briefs Magazine - September 2024 - 15
Tech Briefs Magazine - September 2024 - 16
Tech Briefs Magazine - September 2024 - 16A
Tech Briefs Magazine - September 2024 - 16B
Tech Briefs Magazine - September 2024 - 16C
Tech Briefs Magazine - September 2024 - 16D
Tech Briefs Magazine - September 2024 - 17
Tech Briefs Magazine - September 2024 - 18
Tech Briefs Magazine - September 2024 - 19
Tech Briefs Magazine - September 2024 - 20
Tech Briefs Magazine - September 2024 - 21
Tech Briefs Magazine - September 2024 - 22
Tech Briefs Magazine - September 2024 - 23
Tech Briefs Magazine - September 2024 - 24
Tech Briefs Magazine - September 2024 - 25
Tech Briefs Magazine - September 2024 - 26
Tech Briefs Magazine - September 2024 - 27
Tech Briefs Magazine - September 2024 - 28
Tech Briefs Magazine - September 2024 - 29
Tech Briefs Magazine - September 2024 - 30
Tech Briefs Magazine - September 2024 - 31
Tech Briefs Magazine - September 2024 - 32
Tech Briefs Magazine - September 2024 - 33
Tech Briefs Magazine - September 2024 - 34
Tech Briefs Magazine - September 2024 - 35
Tech Briefs Magazine - September 2024 - 36
Tech Briefs Magazine - September 2024 - 37
Tech Briefs Magazine - September 2024 - 38
Tech Briefs Magazine - September 2024 - 39
Tech Briefs Magazine - September 2024 - 40
Tech Briefs Magazine - September 2024 - 41
Tech Briefs Magazine - September 2024 - 42
Tech Briefs Magazine - September 2024 - 43
Tech Briefs Magazine - September 2024 - 44
Tech Briefs Magazine - September 2024 - 45
Tech Briefs Magazine - September 2024 - 46
Tech Briefs Magazine - September 2024 - 47
Tech Briefs Magazine - September 2024 - 48
Tech Briefs Magazine - September 2024 - Cov3
Tech Briefs Magazine - September 2024 - Cov4
Tech Briefs Magazine - September 2024 - PIT-Cov1
Tech Briefs Magazine - September 2024 - PIT-Cov2
Tech Briefs Magazine - September 2024 - PIT-1
Tech Briefs Magazine - September 2024 - PIT-2
Tech Briefs Magazine - September 2024 - PIT-3
Tech Briefs Magazine - September 2024 - PIT-4
Tech Briefs Magazine - September 2024 - PIT-5
Tech Briefs Magazine - September 2024 - PIT-6
Tech Briefs Magazine - September 2024 - PIT-7
Tech Briefs Magazine - September 2024 - PIT-8
Tech Briefs Magazine - September 2024 - PIT-9
Tech Briefs Magazine - September 2024 - PIT-10
Tech Briefs Magazine - September 2024 - PIT-11
Tech Briefs Magazine - September 2024 - PIT-12
Tech Briefs Magazine - September 2024 - PIT-13
Tech Briefs Magazine - September 2024 - PIT-14
Tech Briefs Magazine - September 2024 - PIT-15
Tech Briefs Magazine - September 2024 - PIT-16
Tech Briefs Magazine - September 2024 - PIT-17
Tech Briefs Magazine - September 2024 - PIT-18
Tech Briefs Magazine - September 2024 - PIT-19
Tech Briefs Magazine - September 2024 - PIT-20
Tech Briefs Magazine - September 2024 - PIT-21
Tech Briefs Magazine - September 2024 - PIT-22
Tech Briefs Magazine - September 2024 - PIT-23
Tech Briefs Magazine - September 2024 - PIT-24
Tech Briefs Magazine - September 2024 - PIT-25
Tech Briefs Magazine - September 2024 - PIT-Cov4
https://www.nxtbook.com/smg/techbriefs/24TB11
https://www.nxtbook.com/smg/techbriefs/24TB10
https://www.nxtbook.com/smg/techbriefs/24TB09B
https://www.nxtbook.com/smg/techbriefs/24TB09
https://www.nxtbook.com/smg/techbriefs/24TB08
https://www.nxtbook.com/smg/techbriefs/24TB07
https://www.nxtbook.com/smg/techbriefs/24TB06
https://www.nxtbook.com/smg/techbriefs/24TB05B
https://www.nxtbook.com/smg/techbriefs/24TB05
https://www.nxtbook.com/smg/techbriefs/24TB04
https://www.nxtbook.com/smg/techbriefs/24TB03
https://www.nxtbook.com/smg/techbriefs/24TB02
https://www.nxtbook.com/smg/techbriefs/24TB01
https://www.nxtbook.com/smg/techbriefs/23TB12
https://www.nxtbook.com/smg/techbriefs/23TB11
https://www.nxtbook.com/smg/techbriefs/23TB10
https://www.nxtbook.com/smg/techbriefs/23TB09
https://www.nxtbook.com/smg/techbriefs/23TB08
https://www.nxtbook.com/smg/techbriefs/23TB07
https://www.nxtbook.com/smg/techbriefs/23TB06
https://www.nxtbook.com/smg/techbriefs/23TB05
https://www.nxtbook.com/smg/techbriefs/23TB04
https://www.nxtbook.com/smg/techbriefs/23TB03
https://www.nxtbook.com/smg/techbriefs/23TB02
https://www.nxtbook.com/smg/techbriefs/23TB01
https://www.nxtbook.com/smg/Testing/22TB12
https://www.nxtbook.com/smg/techbriefs/22TB12
https://www.nxtbook.com/smg/techbriefs/22TB11
https://www.nxtbook.com/smg/techbriefs/22TB10
https://www.nxtbook.com/smg/techbriefs/22TB09
https://www.nxtbook.com/smg/techbriefs/22TB08
https://www.nxtbook.com/smg/techbriefs/22TB07
https://www.nxtbook.com/smg/techbriefs/22TB06
https://www.nxtbook.com/smg/techbriefs/22TB05-P
https://www.nxtbook.com/smg/techbriefs/22TB05-D
https://www.nxtbook.com/smg/techbriefs/22TB04
https://www.nxtbook.com/smg/techbriefs/22TB03
https://www.nxtbook.com/smg/techbriefs/22TB02
https://www.nxtbook.com/smg/techbriefs/22TB01
https://www.nxtbook.com/smg/techbriefs/21TB12
https://www.nxtbook.com/smg/techbriefs/21TB11
https://www.nxtbook.com/smg/techbriefs/21TB10
https://www.nxtbook.com/smg/techbriefs/21TB09
https://www.nxtbook.com/smg/techbriefs/21TB08
https://www.nxtbook.com/smg/techbriefs/21TB07
https://www.nxtbook.com/smg/techbriefs/21TB06
https://www.nxtbook.com/smg/techbriefs/21TB05
https://www.nxtbook.com/smg/techbriefs/21TB04
https://www.nxtbook.com/smg/techbriefs/21BT03
https://www.nxtbook.com/smg/techbriefs/21TB02
https://www.nxtbookmedia.com