Do I Need to Ground My Vertical Antenna?
Station Safety · Answered
Do I Need to Ground My Vertical Antenna?
Short answer: for safety, yes — put a ground rod at the base and bond it to your house's electrical service ground. For signal, a vertical dipole needs nothing from the ground at all. “Ground” is two different jobs wearing one name.
Job one: RF
A ground-mounted quarter-wave vertical uses the earth as the other half of the antenna, which is why it wants a field of radials. A vertical dipole carries both halves up in the air, so a ground rod adds nothing to how it plays. That part of the decision is zero percent signal.
Job two: lightning
A rod at the antenna base gives strike energy a short path to earth where the antenna stands — but only if it is bonded. The iron rule: every ground in the system, from the antenna rod to the arrester at the house entrance to the utility service ground, is tied together with heavy conductor into one system. Two unbonded grounds can sit at very different voltages in a strike, and that difference goes looking for a path, usually through the shack.
The rest of the method
Bring every line into the house at one entry point with an arrester there; if a remote tuner is powered over the coax, use a DC-pass arrester so the control voltage still reaches it. Disconnect when storms are forecast. Ward Silver, N0AX, lays out the whole method in the ARRL's Grounding and Bonding for the Radio Amateur, and Article 810 of the National Electrical Code covers antenna grounding. Your local inspector always has the last word.
Go Deeper
Ground Is Two Jobs Wearing One Name
Three Grounds Walk Into a Shack: lightning, RF, and the bond
No Radials: two kinds, only one works
Station lightning protection
Ground for safety, choke for RF, bond everything. — Jon Kimball, KL2A · 435-200-4902