It adds RF impedance to the ground system. Lightning protectors are put in the antenna coax leads and tied to bus at the building entry point. Grounding will prevent electrocution of individuals operating the radios. Coax should turn at a right angle when it leaves the lightning protector. Keep the lightning path straight, short and direct to the ground rods.
Grounding has minimal effect on the RF radiation of the system.
Grounding will prevent electrocution of individuals operating the radios. Lightning protectors can be made or purchased because of their sizes. Rods and cables are the same as HF systems above. Tower grounded with a system of rods at base and tied to legs of tower. For example, Put three rods in a triangle shape around the tower.