Path: ...!Xl.tags.giganews.com!local-2.nntp.ord.giganews.com!nntp.supernews.com!news.supernews.com.POSTED!not-for-mail NNTP-Posting-Date: Mon, 27 May 2024 11:12:18 +0000 From: john larkin Newsgroups: sci.electronics.design Subject: Re: Small magnetic tunable filter for 6G and beyond Date: Mon, 27 May 2024 04:12:17 -0700 Message-ID: References: User-Agent: ForteAgent/8.00.32.1272 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Lines: 31 X-Trace: sv3-OEAwmfGRbs2TIAy2v4crMil0AdBy0WwuKu1ZGii+H9HQggcevILTaPZQ2VkXUUUPxivnyPphoGy8R/l!QTxrhFi/UcYzFevge/g8kUWsDUoVS/i3jqlm+d3nkEcb0N6BFUeRS93hxgRwQ87nuLYctsocMtOh!QisSrQ== X-Complaints-To: www.supernews.com/docs/abuse.html X-DMCA-Complaints-To: www.supernews.com/docs/dmca.html X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40 Bytes: 2899 On Mon, 27 May 2024 09:56:53 +0200, Jeroen Belleman 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 filters and oscillators have been around for ages. It seems to me that tuning them with a magnetic field is messy.