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| NNTP-Posting-Date | Sat, 26 May 2018 13:39:18 -0500 |
| From | Randy Yates <yates@digitalsignallabs.com> |
| Newsgroups | comp.dsp |
| Subject | Re: Wavelength Dependency in RF Propagation? |
| Organization | Digital Signal Labs |
| References | <87lgc7j7oo.fsf@digitalsignallabs.com> <peb4t9$i7o$1@gwaiyur.mb-net.net> |
| Date | Sat, 26 May 2018 14:39:17 -0400 |
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Hi Marcel, Thank you for responding and discussing. Marcel Mueller <news.5.maazl@spamgourmet.org> writes: > On 26.05.18 07.40, Randy Yates wrote: >> I was miffed initially by this statement since, as far as I know, there >> is nothing inherent in wavelength that impacts how RF waves travel >> through space. > > If you are talking about vacuum then yes. In all other media the > velocity of propagation depends on the frequency. E.g. water molecules > in the air interact frequency dependent. Does the velocity of propagation affect path loss/attenuation? >> But I guess this was just a way (a confusing one, IMO) of referring to >> the wavelength dependency of antenna aperture, as explained nicely >> in this article on the Friis equation? > > The coupling of the antenna to the free space also introduces a > frequency dependent group delay. I didn't know that. I can certainly see that group delay impacts the overall response (namely, the phase response), but it doesn't cause attenuatation. I was mainly interested in attenutation. > And last but not least a short distance link has some frequencies with > poor performance due to eigenvalues of the overall geometry. I love it! Applying linear algebra to wave propagation! Do you have a reference (hopefully easy to read)? -- Randy Yates, DSP/Embedded Firmware Developer Digital Signal Labs http://www.digitalsignallabs.com
Back to comp.dsp | Previous | Next — Previous in thread | Next in thread | Find similar
Wavelength Dependency in RF Propagation? Randy Yates <yates@digitalsignallabs.com> - 2018-05-26 01:40 -0400
Re: Wavelength Dependency in RF Propagation? Marcel Mueller <news.5.maazl@spamgourmet.org> - 2018-05-26 10:12 +0200
Re: Wavelength Dependency in RF Propagation? Randy Yates <yates@digitalsignallabs.com> - 2018-05-26 14:39 -0400
Re: Wavelength Dependency in RF Propagation? Les Cargill <lcargill99@comcast.com> - 2018-05-27 13:25 -0500
Re: Wavelength Dependency in RF Propagation? boB <boB@K7IQ.com> - 2018-05-26 01:27 -0700
Re: Wavelength Dependency in RF Propagation? theman@ericjacobsen.org (Eric Jacobsen) - 2018-05-26 20:56 +0000
Re: Wavelength Dependency in RF Propagation? gyansorova@gmail.com - 2018-06-25 11:54 -0700
Re: Wavelength Dependency in RF Propagation? theman@ericjacobsen.org (Eric Jacobsen) - 2018-06-25 20:59 +0000
Re: Wavelength Dependency in RF Propagation? makolber@yahoo.com - 2018-06-26 06:16 -0700
Re: Wavelength Dependency in RF Propagation? spope384@gmail.com (Steve Pope) - 2018-05-26 21:30 +0000
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