His question was perfectly clear to me, or at least here is how I read it: Can I connect my antenna to a wireless router or wireless access point, then broadcast that signal to another wireless device connected to my scanner (which would convert the wireless broadcast to the original signal) so that I can receive the antenna signal at my scanner without being physically connected to that antenna?
I don't know of any way of doing this. I would think you would need some type of powered device to capture and boost the signal from the antenna, then send it back out via ethernet. If anyone would have any type of device that could do sucha thing, I would think it would be someone like
www.blackbox.com.
Side note... you could use this to remotely control your serial connected scanner (if equiped) like if it was in your attic or something:
http://www.blackbox.com/Catalog/Detail.aspx?cid=1246,1847,1848&mid=5120
That may even work as a solution for your question if you could get the antenna down to a serial connection.
I am broadcasting on the internet, and I can use my latop and wireless router to pick up the broadcast while I am in range of my (or any other) wireless network. You could do the same thing by using your internal IP address only. Then, you could connect an antenna to a scanner, the scanner to a PC, the PC to a wireless router, and put all that away in your attic or something. Then, listen in on a laptop or PC connected wirelessly. I know that isn't exactly what you are wanting to do, but that should be a step closer.
You know... you could call Black Box and ask about what it is you want to do.