I have added just a few notes and 1 graphic to the EDZ Update notes at the
site. They are unimportant practically, unless you are curious about how
you might make a non-Yagi beam with 21 dBi forward gain, more than 25 dB
F-B, and 16-17 degrees beamwidth--in case you have a friend 10,000 miles
away with whom you want a private conversation and you left your cell
phone at the office. In one sense, the array is just some cheap wire and
simple in principle. In another sense, as a mental exercise, it is fairly
sophisticated, using a half dozen or so (depending on how you count)
different antenna principles in combination. In fact, if you like to test
yourself every now and then, ask yourself this question: compared to a
dipole, from where does each small increment of performance come?
I know: it is May, final exam season, and I just turned a curiosity into
the last question for Antennas 101. Sorry about that; occupational
hazard.
-73-
LB, W4RNL
L. B. Cebik, W4RNL /\ /\ * / / / (Off)(423) 974-7215
1434 High Mesa Drive / \/ \/\ ----/\--- (Hm) (423) 938-6335
Knoxville, Tennessee /\ \ \ \ / / || / (FAX)(423) 974-3509
37938-4443 USA / \ \ \ \ || cebik@utk.edu
URL: http://funnelweb.utcc.utk.edu/~cebik/radio.html
--
FAQ on WWW: http://www.contesting.com/towertalkfaq.html
Submissions: towertalk@contesting.com
Administrative requests: towertalk-REQUEST@contesting.com
Problems: owner-towertalk@contesting.com
|