To 6G and beyond: Engineers unlock the next generation of wireless communications:
https://www.sciencedaily.com/releases/2024/05/240524114938.htm
Source:
University of Pennsylvania School of Engineering and Applied Science Summary:
Engineers have developed a new tool that could unlock 6G and the next generation of wireless networks: an adjustable filter that can successfully prevent interference in high-frequency bands of the electromagnetic spectrum.
partial quote:
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," says 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," says 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.
On 5/27/24 07:08, Jan Panteltje wrote:
To 6G and beyond: Engineers unlock the next generation of wireless communications:
https://www.sciencedaily.com/releases/2024/05/240524114938.htm
Source:
University of Pennsylvania School of Engineering and Applied Science
Summary:
Engineers have developed a new tool that could unlock 6G and the next generation of wireless networks: an adjustable filter that can successfully prevent interference in high-frequency bands of the electromagnetic spectrum.
partial quote:
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," says 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," says 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.
YIG filter and resonators have always been a bit exotic. Maybe this
will make them common-place. And more compact, hopefully! The YIG
was tiny, sure, but the magnet wasn't.
Jeroen Belleman
On 5/27/24 07:08, Jan Panteltje wrote:
To 6G and beyond: Engineers unlock the next generation of wireless communications:
https://www.sciencedaily.com/releases/2024/05/240524114938.htm
Source:
University of Pennsylvania School of Engineering and Applied Science
Summary:
Engineers have developed a new tool that could unlock 6G and the next
generation of wireless networks: an adjustable filter that can
successfully prevent interference in high-frequency bands of the electromagnetic spectrum.
partial quote:
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," says 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," says 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.
YIG filter and resonators have always been a bit exotic. Maybe this
will make them common-place. And more compact, hopefully! The YIG
was tiny, sure, but the magnet wasn't.
Jeroen Belleman
Jeroen Belleman <jeroen@nospam.please> wrote:
On 5/27/24 07:08, Jan Panteltje wrote:
To 6G and beyond: Engineers unlock the next generation of wireless communications:
https://www.sciencedaily.com/releases/2024/05/240524114938.htm
Source:
University of Pennsylvania School of Engineering and Applied Science
Summary:
Engineers have developed a new tool that could unlock 6G and the next
generation of wireless networks: an adjustable filter that can
successfully prevent interference in high-frequency bands of the
electromagnetic spectrum.
partial quote:
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," says 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," says 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.
YIG filter and resonators have always been a bit exotic. Maybe this
will make them common-place. And more compact, hopefully! The YIG
was tiny, sure, but the magnet wasn't.
Jeroen Belleman
YIG-tuned VFOs are the champs for low close-in phase noise. My HP 8566B’s noise floor at 1kHz
If they manage to get them down to Digikey-level practicality without screwing that up, it would be huge.
I wonder if you could use a mag amp sort of structure, with a rare earth magnet biasing some cleverly designed bits of saturable ferrite, plus some small coils changing the effective gap in the magnetic circuit.
Fun to think about.
Cheers
Phil Hobbs
Jeroen Belleman <jeroen@nospam.please> wrote:
On 5/27/24 07:08, Jan Panteltje wrote:
To 6G and beyond: Engineers unlock the next generation of wireless communications:
https://www.sciencedaily.com/releases/2024/05/240524114938.htm
Source:
University of Pennsylvania School of Engineering and Applied Science
Summary:
Engineers have developed a new tool that could unlock 6G and the next
generation of wireless networks: an adjustable filter that can
successfully prevent interference in high-frequency bands of the electromagnetic spectrum.
partial quote:
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," says 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," says 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.
YIG filter and resonators have always been a bit exotic. Maybe this
will make them common-place. And more compact, hopefully! The YIG
was tiny, sure, but the magnet wasn't.
Jeroen Belleman
YIG-tuned VFOs are the champs for low close-in phase noise. My HP 8566B’s >noise floor at 1kHz is a good 30 dB better than any SDR-style analyzer.
If they manage to get them down to Digikey-level practicality without >screwing that up, it would be huge.
I wonder if you could use a mag amp sort of structure, with a rare earth >magnet biasing some cleverly designed bits of saturable ferrite, plus some >small coils changing the effective gap in the magnetic circuit.
Fun to think about.
Cheers
Phil Hobbs
To 6G and beyond: Engineers unlock the next generation of wireless communications:
https://www.sciencedaily.com/releases/2024/05/240524114938.htm
Source:
University of Pennsylvania School of Engineering and Applied Science
Summary:
Engineers have developed a new tool that could unlock 6G and the next generation of wireless networks: an adjustable filter that can successfully prevent interference in high-frequency bands of the electromagnetic spectrum.
partial quote:
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," says 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," says 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.
On Mon, 27 May 2024 05:08:40 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
To 6G and beyond: Engineers unlock the next generation of wireless communications:
https://www.sciencedaily.com/releases/2024/05/240524114938.htm
Source:
University of Pennsylvania School of Engineering and Applied Science >>Summary:
Engineers have developed a new tool that could unlock 6G and the next generation of wireless networks: an adjustable filter that can successfully prevent interference in high-frequency bands of the electromagnetic spectrum.
partial quote:
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," says 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," says 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.
As with many breathless announcements of breakthroughs, this may not
fare well in reality, for all the reasons mentioned up thread. But
anyway, here is the full announcement:
.<https://blog.seas.upenn.edu/to-6g-and-beyond-penn-engineers-unlock-the-next-generation-of-wireless-communications/>
The item about LightSquared is amusingly off-mark: The problem with >LightSquared was that their proposed ground-based transmissions were
far too strong, and threatened to overwhelm existing GPS receivers, in >particular those in safety-of-flight involved GPS receivers. Inventing
a fancy new filter won't help any more than boring old filter
technologies, as it's the GPS receivers would need to be updated and >recertified, which is a very big deal.
I haven't looked, but I bet there is an arXive paper on the yig filter >details.
Joe Gwinn
Does satellite nevigation need a low-Q tunable bandpass filter? There
are great SAW-type resonators around with better filtering, no magnets required.
john larkin <jl@650pot.com> wrote:
On Mon, 27 May 2024 12:58:08 -0000 (UTC), Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:
Jeroen Belleman <jeroen@nospam.please> wrote:
On 5/27/24 07:08, Jan Panteltje wrote:
To 6G and beyond: Engineers unlock the next generation of wireless communications:
https://www.sciencedaily.com/releases/2024/05/240524114938.htm
Source:
University of Pennsylvania School of Engineering and Applied Science >>>>> Summary:
Engineers have developed a new tool that could unlock 6G and the next >>>>> generation of wireless networks: an adjustable filter that can
successfully prevent interference in high-frequency bands of the
electromagnetic spectrum.
partial quote:
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," says 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," says 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.
YIG filter and resonators have always been a bit exotic. Maybe this
will make them common-place. And more compact, hopefully! The YIG
was tiny, sure, but the magnet wasn't.
Jeroen Belleman
YIG-tuned VFOs are the champs for low close-in phase noise. My HP 8566B?s >>> noise floor at 1kHz is a good 30 dB better than any SDR-style analyzer.
If they manage to get them down to Digikey-level practicality without
screwing that up, it would be huge.
I wonder if you could use a mag amp sort of structure, with a rare earth >>> magnet biasing some cleverly designed bits of saturable ferrite, plus some >>> small coils changing the effective gap in the magnetic circuit.
Fun to think about.
Cheers
Phil Hobbs
How can one keep a magnetic field stable to parts per billion?
Normally unnecessary for a YTO, I think.
Seems like ambient 60 Hz fields and temperature changes and tiny
noises in the coil current would dominate. It's hard to regulate a
current to parts per million.
A well-degenerated BJT with a 2- or 3-pole lowpass on the base makes a deep >sub-Poissonian current source. One of our laser drivers has a noise floor >below -190 dBc/Hz at 400 mA, about 24 dB below shot noise.
You do have to handle the low baseband somehow, of course. For the laser >driver it’s an op amp and voltage reference, and for the YTO it’s a PLL.
Cheers
Phil Hobbs
On Mon, 27 May 2024 12:58:08 -0000 (UTC), Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:
Jeroen Belleman <jeroen@nospam.please> wrote:
On 5/27/24 07:08, Jan Panteltje wrote:
To 6G and beyond: Engineers unlock the next generation of wireless communications:
https://www.sciencedaily.com/releases/2024/05/240524114938.htm
Source:
University of Pennsylvania School of Engineering and Applied Science
Summary:
Engineers have developed a new tool that could unlock 6G and the next
generation of wireless networks: an adjustable filter that can
successfully prevent interference in high-frequency bands of the
electromagnetic spectrum.
partial quote:
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," says 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," says 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.
YIG filter and resonators have always been a bit exotic. Maybe this
will make them common-place. And more compact, hopefully! The YIG
was tiny, sure, but the magnet wasn't.
Jeroen Belleman
YIG-tuned VFOs are the champs for low close-in phase noise. My HP 8566BÂ’s >> noise floor at 1kHz is a good 30 dB better than any SDR-style analyzer.
If they manage to get them down to Digikey-level practicality without
screwing that up, it would be huge.
I wonder if you could use a mag amp sort of structure, with a rare earth
magnet biasing some cleverly designed bits of saturable ferrite, plus some >> small coils changing the effective gap in the magnetic circuit.
Fun to think about.
Cheers
Phil Hobbs
How can one keep a magnetic field stable to parts per billion?
Seems like ambient 60 Hz fields and temperature changes and tiny
noises in the coil current would dominate. It's hard to regulate a
current to parts per million.
Qs are low too.
Does your HP have a big ovenized mu-metal box inside?
On Mon, 27 May 2024 22:37:31 -0000 (UTC), Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:
john larkin <jl@650pot.com> wrote:
On Mon, 27 May 2024 12:58:08 -0000 (UTC), Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:
Jeroen Belleman <jeroen@nospam.please> wrote:
On 5/27/24 07:08, Jan Panteltje wrote:
To 6G and beyond: Engineers unlock the next generation of wireless communications:
https://www.sciencedaily.com/releases/2024/05/240524114938.htm
Source:
University of Pennsylvania School of Engineering and Applied Science >>>>>> Summary:
Engineers have developed a new tool that could unlock 6G and the next >>>>>> generation of wireless networks: an adjustable filter that can
successfully prevent interference in high-frequency bands of the
electromagnetic spectrum.
partial quote:
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," says 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," says 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.
YIG filter and resonators have always been a bit exotic. Maybe this
will make them common-place. And more compact, hopefully! The YIG
was tiny, sure, but the magnet wasn't.
Jeroen Belleman
YIG-tuned VFOs are the champs for low close-in phase noise. My HP 8566B?s >>>> noise floor at 1kHz is a good 30 dB better than any SDR-style analyzer. >>>>
If they manage to get them down to Digikey-level practicality without
screwing that up, it would be huge.
I wonder if you could use a mag amp sort of structure, with a rare earth >>>> magnet biasing some cleverly designed bits of saturable ferrite, plus some >>>> small coils changing the effective gap in the magnetic circuit.
Fun to think about.
Cheers
Phil Hobbs
How can one keep a magnetic field stable to parts per billion?
Normally unnecessary for a YTO, I think.
Seems like ambient 60 Hz fields and temperature changes and tiny
noises in the coil current would dominate. It's hard to regulate a
current to parts per million.
A well-degenerated BJT with a 2- or 3-pole lowpass on the base makes a deep >> sub-Poissonian current source. One of our laser drivers has a noise floor
below -190 dBc/Hz at 400 mA, about 24 dB below shot noise.
You do have to handle the low baseband somehow, of course. For the laser
driver it’s an op amp and voltage reference, and for the YTO it’s a PLL.
Is the yig phase-locked to an XO? I guess that would make a nice
jump-tunable first-mixer oscillator. Something else would have to
sweep the IF.
On Mon, 27 May 2024 12:58:08 -0000 (UTC), Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:
Jeroen Belleman <jeroen@nospam.please> wrote:
On 5/27/24 07:08, Jan Panteltje wrote:
To 6G and beyond: Engineers unlock the next generation of wireless communications:
https://www.sciencedaily.com/releases/2024/05/240524114938.htm
Source:
University of Pennsylvania School of Engineering and Applied Science
Summary:
Engineers have developed a new tool that could unlock 6G and the next
generation of wireless networks: an adjustable filter that can
successfully prevent interference in high-frequency bands of the electromagnetic spectrum.
partial quote:
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," says 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," says 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.
YIG filter and resonators have always been a bit exotic. Maybe this
will make them common-place. And more compact, hopefully! The YIG
was tiny, sure, but the magnet wasn't.
Jeroen Belleman
YIG-tuned VFOs are the champs for low close-in phase noise. My HP 8566B’s >> noise floor at 1kHz is a good 30 dB better than any SDR-style analyzer.
If they manage to get them down to Digikey-level practicality without
screwing that up, it would be huge.
I wonder if you could use a mag amp sort of structure, with a rare earth
magnet biasing some cleverly designed bits of saturable ferrite, plus some >> small coils changing the effective gap in the magnetic circuit.
Fun to think about.
Cheers
Phil Hobbs
How can one keep a magnetic field stable to parts per billion?
Seems like ambient 60 Hz fields and temperature changes and tiny
noises in the coil current would dominate. It's hard to regulate a
current to parts per million.
Qs are low too.
Does your HP have a big ovenized mu-metal box inside?
On Mon, 27 May 2024 13:27:02 -0400, Joe Gwinn <joegwinn@comcast.net>
wrote:
On Mon, 27 May 2024 05:08:40 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
To 6G and beyond: Engineers unlock the next generation of wireless communications:
https://www.sciencedaily.com/releases/2024/05/240524114938.htm
Source:
University of Pennsylvania School of Engineering and Applied Science
Summary:
Engineers have developed a new tool that could unlock 6G and the next generation of wireless networks: an adjustable filter that can successfully prevent interference in high-frequency bands of the electromagnetic spectrum.
partial quote:
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," says 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," says 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.
As with many breathless announcements of breakthroughs, this may not
fare well in reality, for all the reasons mentioned up thread. But
anyway, here is the full announcement:
.<https://blog.seas.upenn.edu/to-6g-and-beyond-penn-engineers-unlock-the-next-generation-of-wireless-communications/>
The item about LightSquared is amusingly off-mark: The problem with
LightSquared was that their proposed ground-based transmissions were
far too strong, and threatened to overwhelm existing GPS receivers, in
particular those in safety-of-flight involved GPS receivers. Inventing
a fancy new filter won't help any more than boring old filter
technologies, as it's the GPS receivers would need to be updated and
recertified, which is a very big deal.
I haven't looked, but I bet there is an arXive paper on the yig filter
details.
Joe Gwinn
Does satellite nevigation need a low-Q tunable bandpass filter? There
are great SAW-type resonators around with better filtering, no magnets required.
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