Would something like this be of any use?

http://www.daveswebshop.com/d911.shtml

It is a flat cable (about 2-3mm thick (from memory, the last time I saw
one!)

I have no idea if it will drastically affect the signal, but as it is
quite
short, I would think it will be OK.

If your windows have a rubber type seal, it may be possible to close the
window on it (and it is only about £4 so no great loss if it doesn't!)

You will also need a short normal co-ax (with F connectors on) to go from
the dish to this thing, then use your original cable top go to the set
top
box.

Sparks...


The window has atleast 2 panes and is the heat saving ones.


This may sound crazy, but I don't care about having the window open if
I can have my digital tv! It's worth it.

Plus the wall is really thick (i.e. the window sill is very deep/wide)

Maybe you have misunderstood me here!
This thing is designed to be **** in the window, (I am assuming the cable is
through an open window at the moment, and this is the problem)

Or have I misunderstood you here, and the dish is actually inside the house,
pointing out of a fully opened window? - if so, can you not fix it outside
somehow, and use the cable I suggested?

Sparks...