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From: koning@koning.dec.com (Paul Koning)
Newsgroups: sci.electronics
Subject: Re: Need Theoretical Antenna Info
Message-ID: <7479@shlump.nac.dec.com>
Date: 15 Jan 90 17:36:52 GMT
References: <1172@anasaz.UUCP>
Sender: newsdaemon@shlump.nac.dec.com
Organization: DEC -- Distributed systems architecture
Lines: 30


In article <1172@anasaz.UUCP>, john@anasaz.UUCP (John Moore) writes:

> I am interested in finding the following information, either in
> tables of formulas or, even better, as computer programs. I am
> on usenet, and not the internet, so cannot access internet
> archives using ftp. What I would like to see filled in is the
> following table:

You might look at J. Kraus, Antennas, second edition.  That book 
is considered by many to be the ultimate reference in this area.

I was going to quote some answers from the book but find that I can't
since the antenna type designations are ambiguous.  Does "long dipole"
means 1/2 wave, or longer?  What is the difference between input
impedance and radiation resistance -- the reactance, the losses, or what?

Anyway, here's an attempt...

Antenna Type    	Effective   Input	 Radiation
			Aperture    Impedance	 Resistance

Short Dipole	 	0.119	      		2 Ohm for .1 wave
Long Dipole (1/2 wave) 	0.13		 	73 Ohm
>Short g-plane qwave	????	      ???	   ???
>Long g-plane qwave	????	      ???	   ???
>Magnetic Dipole   	????	      ???	   ???	
  ^ is that a loop?  What size?

	paul, ni1d