[Top] [All Lists]

[TowerTalk] Stacking question

To: <>
Subject: [TowerTalk] Stacking question
From: (Tom Osborne)
Date: Thu, 11 Nov 1999 21:31:40 -0800

Hi Gang

I've been wondering about some things.  Say 2 3 element
monobanders are stacked, the gain goes up 3 db (at least that's
what I think).  If there is 100 watts going to the antennas, when
it reaches the splitter does 50 watts go to each antenna or does
the full 100 watts reach each antenna.  If only 50 watts, it
doesn't seem like there is actually any gain in stacking antennas
as the gain goes up but the ERP is the same as with one antenna. 
I know that the takeoff angle is supposed to be lower with a
stack, but how much would you have to raise a single antenna to
get the same take off angle with 2 antennas in a stack.
What got me to wondering is I'm going to play with a 10 meter
antenna here.  I'm now using a 2 element monobander on 10, driven
element and reflector, and I want to put another driven element
on the other end so I can switch directions with the beam. I also
would like to be able to feed them both so I could beam NW and SE
at the same time.  Just wondering what would happen feeding them
both.  Thanks and 73

FAQ on WWW:     
Administrative requests:

<Prev in Thread] Current Thread [Next in Thread>