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From: myers@hpfcdj.HP.COM (Bob Myers)
Newsgroups: sci.electronics
Subject: Re: Boosting output of a little walkie-talkie
Message-ID: <17660086@hpfcdj.HP.COM>
Date: 13 Aug 90 18:56:06 GMT
References: <3011@media-lab.MEDIA.MIT.EDU>
Organization: Hewlett Packard -- Fort Collins, CO
Lines: 17

>An antenna is hooked up so that it looks like a short circuit at D.C.......


Not always; for example, a normal half-wave dipole is an OPEN to DC.  The
DC resistance depends completely on the antenna design in question, and has
very little to do with the RF feedpoint impedance.

(Some designs which would show a "short at DC" would be a vertical with a coil
between feedpoint and ground, or a loop antenna, or various feeds of "normally
open" antenna types, such as a delta match on a dipole.  One other which
wouldn't would be the "normal" log-periodic, such as is used for TV reception.)



Bob Myers  KC0EW   HP Graphics Tech. Div.|  Opinions expressed here are not
                   Ft. Collins, Colorado |  those of my employer or any other
myers@fc.hp.com                          |  sentient life-form on this planet.