http://www.stormcam.org/bnc-antenna/
Coaxial cable to use my camera as an antenna?
I have 300 feet of five-pin coaxial ending to a camera. I use the ground wire in the coaxial antenna cable, if power is cut in line? Can I use it with the unit unplugged coaxial cable? Can I take a wire and run it in the center of NBC radio and use another wire in the same cable to connect to protection? OR .. Can I use a wire in the coaxial cable antenna connected or disconnected, then connect the screen on NBC in the receiver to a field?
You can use a coaxial cable as an antenna, but with the right connections. If you try to use the center wire antenna and connect the shield to ground the shield to do its job and prevent the RF signal to obtain. You can use the shield wire, if not the earth. You can use the wire center if the shield is not connected to anything. The antenna wire must be the right length for the frequency you're looking for to transmit. A random length of wire will work to some extent but will not be very effective. The correct line length means you do not pass a signal at all. If you can, it would be preferable to establish an antenna itself.
Top 5 Great Cable Antenna for 2011