I’m in the middle of setting up a CB for my. This is my current setup. Looking for antenna recommendations
That's a good graphic for emphasis but the "amoeba" varies a whole bunch depending on how you grounded/bonded, the antenna itself, mods you've made.
Although, this also depends on the frequency range the radio uses. More important when dealing with UHF CB that we use now, than the 27MHz that used to be common.