[John Candle]

The first choice for grounding is the house ground rod that is in the ground below the electric meter. Ideally the coax would come down from the antenna close to house electric service meter area and a 'coax grounding block' is used to ground the foil shield and shield wires of the coax with a wire from the coax grounding block to the house ground. And ideally a Ground Wire is connected to the metal structure that holds the outdoor antenna and then brought down to and connected to the house ground rod. HomeDepot and Lowes have all manner of grounding supplies. The truth is that a direct lightning strike on the grounded wires will melt the wires in a split second and the lightning can then jump to something else. The main reason for grounding is to divert atmospheric electric static and other electromagnetic interference to ground.