|Subject:||[TowerTalk] Really elementary question|
|From:||Pete Smith <email@example.com>|
|Date:||Tue, 25 Nov 2003 08:47:42 -0500|
Somehow in my 49 years as a ham I've managed to avoid practical experience
with phased arrays, but now I'm working on an array of K9AY loops for 160m
receiving, and realize that I lack an essential piece of information. A
cruise through the antenna Book hasn't helped.|
The question is this -- when a two-element array is specified as having one element 90 degrees from the other -- in modeling terms, antenna A's phase is zero and antenna B's is 90 -- does this mean that you feed antenna A and then connect from there to B through 90 degrees of coax (1/4 WL x velocity factor) or is it the other way around? What about 0 and -90? If the two antennas are supposed to be 180 out of phase can you connect them in either sequence, as long as the line between them is an electrical half-wave? I'd think "yes" but I've grown wary of my intuition on such things.
73, Pete N4ZR The World HF Contest Station Database was updated October 29. 2469 stations are listed -- 29 new and over 100 updated. Are you current? www.pvrc.org/wcsd/wcsdsearch.htm
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
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