RF wise it is similar to a cavity. But I agree with Forrest, not all that useful if for a single frequency. If it could be designed for RF waves like a standard cavity that knocks down all but a narrow range by 85db that could possibly be a much lower loss way of either running multiple frequencies through an antenna. on a BH dish that could allow tighter packing of frequencies. But if that device was a single frequency, a multiple frequency device could be enormous.
On Thu, Mar 14, 2019 at 5:42 AM Forrest Christian (List Account) < li...@packetflux.com> wrote: > My question is whether it's tuned to a specific frequency or not... > In the video, they were outputting a frequency which sounded pretty > much like a single tone. Building a device with this behavior to a > single tone seems to be trivial in comparison to a device which would > block a wide range of frequencies. For instance one could build a > device which effectively delayed the sound by a 1/2 wavelength which > would cancel the remaining sound out. > > So: if this is a single-frequency device, I'm not extremely > impressed. Oh, I guess it might cancel harmonics as well.... If > instead it cancels a wide range of frequencies it's much more useful > and interesting. > > Even if it is a single frequency device, there are probably some > applications, just not as many if it is truly a wideband "muffler". > > On Wed, Mar 13, 2019 at 9:22 PM Chuck McCown <ch...@wbmfg.com> wrote: > > > > Interesting, it acts like an open circuit quarter wave stub. > > > > From: Sean Heskett > > Sent: Wednesday, March 13, 2019 9:02 PM > > To: AnimalFarm Microwave Users Group > > Subject: [AFMUG] shape that blocks all sound > > > > > https://www.fastcompany.com/90316833/scientists-have-discovered-a-shape-that-blocks-all-sound-even-your-co-workers > > > > i wonder if this could have some use case in RF antenna designs? > > > > > > > > ________________________________ > > -- > > AF mailing list > > AF@af.afmug.com > > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > > > -- > > AF mailing list > > AF@af.afmug.com > > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > > > -- > - Forrest > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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