In message <[email protected]>, dated Thu, 19 Apr 2007, Jim Eichner <[email protected]> writes:
I can't help with the source but I may with the reasoning. >The search has led me to revisit the theory, in particular that antenna >gain is really a measure of directionality Directionality AND losses. >and is related to the signal magnitude in the pointing direction, >relative to that of an ideal isotropic radiator. That is correct and includes directional gain and 'loss loss'. > >Q2: My theory question is does a real life 0dBi antenna really exist? >Isn't that an ideal isotropic radiator and therefore non-existent? If it were lossless, yes. > Or are mfr's taking a directional antenna that has > gain and adding (or designing in) attenuation to overcome the gain? Yes, I suppose so. Even if they don't, YOU can. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk There are benefits from being irrational - just ask the square root of 2. John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________
