Good one! Let's see a 18db gain...what length/gain yagi did you use?
I get about 8db gain with the 9db 29" 6 element Antennex yagi...but
then I can still carry it easily in my car trunk
I tend to do overkill, when at times lesser gain antenna or cheaper
cable can be used. But if your going through all that trouble, why not
make sure the darn thing is going to work well. The small extra cost of
better equipment divided over many years of reliable service, works out
to be very little.
Also, a higher gain should help when the signal is being effected by
less than ideal atmospheric conditons ie. rain snow, wind.
1x is good. Later version of digital technology allowing more capacity
and data services with cell hooked up to laptop.
The weakest link is probably the antenna connector port on the phone
and then the connector itself. Not much one can do except not be
yanking it around unneccessarily. A spare phone and antenna connector
wouldn't hurt, but it sounds like you have landline back up.
I mention this because some peoples homes and cabins ONLY have a
cellular phone/Yagi set up.
-
David