I'd like to install an outdoor dual band VHF/UHF base station antenna, a simple pole antenna like the Comet GP-1.
I live in an area where lightning is rare, but not unheard of. Should I drive ground rods into the ground for antenna/RF grounding? The antenna itself has several small ground radials, so I'm assuming that a good ground will aid performance, but don't know if using the existing building ground is "good enough".
I live in a multi-unit building which may complicate this since my understanding is that any antenna ground system should be bonded to the building ground to prevent differing ground potentials (and the bonding should be via a dedicated ground wire directly to the building ground, not through a ground conductor in the building wiring), however my building ground rod is in a separate structure. The service entrance is in a closet in the back of a garage structure, then it goes under a sidewalk and my front yard and then into a service panel in my kitchen in the middle of the house (either under or through the cement slab). There's no apparent grounding electrode for the living unit, and even if there was, there's no easy way to run a ground wire from the antenna to it since I'd either have to go around a neighbor's unit or over the roof to reach it. It is possible that the service panel is grounded to the slab rebar or to a ground electrode that's not visible.
My housing complex looks something like the diagram below (though there are more housing units than what I've drawn), where I'm in unit 2 and would mount the antenna outside a room on the back side of the unit, while the service entrance comes in from the garage on the other side, The "V" shows the location of the service panel inside the unit:
Since I'll be using it with a 12VDC mobile transceiver, I could conceivably keep the tranceiver isolated from ground, leaving the antenna & transceiver ground completely separate from the building ground, but that seems quite unsafe if there is a difference in ground potential between the back yard and front yard.
What is the best practice for grounding this antenna?