On Tue, 04 Jul 2006 06:28:16 -0000, Dave Platt wrote:
> There may be a cheaper way for you to get the gain you need, from your
> existing equipment, without spending any money at all. It's possible
> to fabricate a corner reflector, or (even better) a parabolic
> reflector, out of material as inexpensive as cardboard (or posterboard
> or something like that) lined with aluminum foil. Simply make one,
> and then set it behind your existing router's vertical antenna... aim
> the parabola in the direction of your shed and place the router's
> antenna at the focal point of the parabola. Aim carefully, and it
> wouldn't be surprising for you to get 8 - 10 dB of additional gain.
Hmm. I wonder. This is too good to be true. So, I will be a bit critical
with you (i.e., the scientific method) just to "test" the assumption so
that I can be sure I understand your position.
Assuming a 9 dBd increase in the directional gain from putting a pie tin
behind one of my existing router antennas, that equates to either 280 or
380 feet of range based on the calculations below.
a) 9 dBd = 10^(9/10) power gain ~= 8x power gain
b) 8x power gain = sqrt(8) range gain ~= 2.8X range gain
c) 100 foot range * 2.8 ~= 280 foot range
I'm a bit confused about the "range gain". May I ask if thta 280 foot range
is the total range or the range improvement?
That is, is my range with a pie tin behind the antenna 280 feet in toto; or
is the range now the 100 original feet + 280 additional feet which equals
380 feet in toto?
Beverly
|
Similar Threads
Linear Mode
