(Continued from Part 1.)
A typical Trucker’s dual-mount CB antenna has 2 coaxes down to one connection to the radio. We want the signal from both antennas, unified exactly for a nice strong signal / in phase voltage pulse, into the radio. Because the antennas are on the sides, like mirror mounts, the strongest, best signal (in phase), will come from the front and rear of the truck, while signals from either side, will cancel each other out (a little bit).
The same thing happens with our Vertical antennas, 2-3-4-5-6-7-8 of them. We want to get rid of the noise and interference to hear cleanly in one direction. These verticals can be arranged in a circle, straight line, triangle, all kinds of shapes. While most people *think* the signal is being concentrated (it is), the biggest advantage is Nulling out the unwanted junk. By combining the antennas, switching in shorter / longer / equal coaxes which tie them together, we can change the shape of our broadcast / receive signal. Continue reading“Antenna Building: Theory and Practice – Part 2, by Hoofer”
