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IMS2022



NEWS FEATURE | JANUARY 19, 2023




BACK CHANNEL — THE HUMAN BODY AS A 6G ANTENNA, NOAA TAKING STOCK OF SPECTRUM, A
3D PRINTING ROUNDUP, AND MORE



By John Oncea, Editor

Back Channel presents the most captivating news and innovations in RF and
microwaves. This week, we look at how Skyworks and Semtech are collaborating to
launch LPWAN reference design for industrial and smart city applications, Rohde
& Schwarz is contributing to the investigation of sub-THz measurement, and the
U.S. and Japan warn that attacks on satellites may trigger a military response.

Researchers have designed a copper bracelet that harvests RF energy, opening the
door to novel wearable devices, according to Lab Manager. Bracelet+, a coiled
copper bracelet that, when worn on the human body, magnifies the bracelet’s
ability to harvest leaked RF up to 10 times more than the copper alone. The idea
of using the human body as the antenna came after testing several other
materials first, like plastic, wood, steel, cardboard, and even electronics of
varying sizes like cell phones and laptops. The RF collection efficiency varied
depending on the antenna’s material, its thickness, and, in the case of the
electronics, whether they were powered on or not. The poorest results came from
a plaster wall, while the second-best result after the human body was a laptop
that was powered on.

The development of sub-THz communications as envisioned for 6G will only be
possible with a solid understanding of the properties of electromagnetic wave
propagation, writes Rohde & Schwarz. The new frequency range between 100 GHz and
330 GHz gains worldwide interest and thus has been the focus of recent Rohde &
Schwarz measurement campaigns. The company’s findings have contributed to the
ITU-R Working Party 5D (W5PD) report, which will provide information to the
International Telecommunication Union (ITU) World Radio Conference 2023, where
frequency bands beyond 100 GHz are expected to be discussed and considered for
allocation.

Space News reports the National Oceanic and Atmospheric Administration (NOAA) is
taking stock of its dependence on specific bands of the radio frequency spectrum
and looking for ways to mitigate the impact of interference or government sales.
Once that survey is completed, NOAA will be in a better position to communicate
with other government agencies the consequences of any decision to sell
spectrum, said Steve Volz, NOAA Satellite and Information Service assistant
administrator. “It is an ongoing challenge,” Volz said. “We expect to have to
fight for maintenance of spectrum. But at the same time, we realize we’re not
going to win every fight.”

In 3D printing news, researchers from the University of Oldenburg are using tiny
nozzles to 3D print nanoscale metallic structures, BioLab Studio developed a 3D
printed bio-scaffold for growing mycelium, Zetamix 3D printed a new dielectric
RF reflector, and the Koehler Group is lending a BigRep PRO 3D printer to
UnternehmerTUM’s MakerSpace. All of this is according to 3DPrint.com.

Skyworks Solutions and Semtech Corporation introduced the SKY66423-SX1261
reference design for low-power wide-area networks (LPWAN). The SKY66423-SX1261
combines Semtech’s LoRa Connect SX1261 transceiver with Skyworks’ SKY66423
front-end module (FEM) for use in a variety of industrial and smart city
applications. “This latest design uniquely leverages our collective technologies
in support of next-generation LPWAN deployments,” said Stefan Fulga, senior
director of marketing for IoT and Emerging Markets at Skyworks. “Our strategic
collaboration continues to produce innovative solutions that fuel our portfolio
expansion across industrial IoT, smart city, and smart home applications.”

Defense Secretary Lloyd Austin and Secretary of State Antony Blinken announced
alongside Japanese officials that they would consider military retaliation in
response to attacks on satellites, a policy that puts China and Russia on notice
amid looming threats in space, reports Military.com. “The outer space component
of this is important to the security and prosperity of our alliance. We agreed,
as you've heard, that attacks to, from, or within space present a clear
challenge, and we affirmed that, depending on the nature of those attacks, this
could lead to the invocation of Article V of our Japan-U.S. Security Treaty,”
Blinken said, referencing the number of the clause in the treaty that covers
mutual defense. “That is significant.” 






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