Path: csiph.com!au2pb.net!feeder.erje.net!1.eu.feeder.erje.net!newsfeed.fsmpi.rwth-aachen.de!newsfeed.straub-nv.de!eternal-september.org!feeder.eternal-september.org!mx02.eternal-september.org!.POSTED!not-for-mail From: jimp@specsol.spam.sux.com Newsgroups: sci.physics Subject: Re: long antenna Date: Tue, 24 Nov 2015 20:04:22 -0000 Organization: A noiseless patient Spider Lines: 22 Sender: Jim Pennino Message-ID: <6fseic-d0e.ln1@mail.specsol.com> References: <6b5f8c35-7374-4502-ad9d-ea3431b913cd@googlegroups.com> <3nmshc-1o2.ln1@mail.specsol.com> <564bc61f$0$21567$b1db1813$79461190@news.astraweb.com> <12e478ab-104b-4424-ac14-bc6281f88da4@googlegroups.com> Injection-Info: mx02.eternal-september.org; posting-host="db4120ef82bbc153014637d4cd15a795"; logging-data="4968"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+LOXjO18m2MhPQCifcp54i" User-Agent: tin/2.2.1-20140504 ("Tober an Righ") (UNIX) (SunOS/5.10 (i86pc)) Cancel-Lock: sha1:z0qVv3zmAoaUNwvZAyTTfIDGEaI= Xref: csiph.com sci.physics:535160 RichD wrote: > On November 17, Timo wrote: >> > The idea that making an antenna longer makes it work better comes from >> > AM radios and car whips where the antenna is much much shorter than >> > wavelength and in that case making it longer often DOES make it work >> > better. >> >> It can help, even when the antenna is larger than the wavelength: >> https://en.wikipedia.org/wiki/Arecibo_Observatory > > Comparing dish vs. wire antenna, is apples vs. oranges. > >> But typically one wants to pay more attention to design than just >> "long extension wire". > > More dish area will collect more signal power, but > apparently this doesn't apply to a wire. A dish doesn't collect anything, it concentrates energy to a point. -- Jim Pennino