I use a cheap DVBT dongle that I control via RTL-SDR. Right now a very basic setup. The general consensus seems to be that a long usb cable should be used (to keep noise from the computer away from the dongle) and the antenna directly plugged into the dongle (without cable, or a short one, is this because ogf grounding?).
The antenna is only a simply telescoping piece of metal. Using an amplifying antenna that I got my hands on, the reception was better, with the simple antenna I practically only pick up noise. Now I want to have a better reception without spending much money - what should I look for? I want to be able to listen to radio standard radio stations, but also to to use it as a scanner, so I'll probably be looking for a broadband antenna.
The dongle was built for TV, do TV and RF antennas have the same connections?
Edit to add
I have a dongle with a PAL-connector, not an F connector (from comparing with pictures)