I've been doing some modeling of various stack configurations, to explore the effect of various feedline options, and I thought the results might be of interest. The basic stack is a pair of Force 12
What Interesting. See if you can model feedlines from antennas that are connected by their shields (as just about all antenna switches do) and their centers open and/or shorted, and the combinations.
I don't know how to do this, but agree that it would be a closer simulation of the real world. I've seen models of dipoles with transmission lines attached, where the physical shield is represented b
Best kept secret around, but since modeling can be a pain on certain days, noone wants to do ALL the math before bolting in the stacks. Modeling all the stuff around, including booms and guy wires an
The shield has to be modeled as a wire in it's own right. It's in the other element's fields. If you break the shield connection at the relays then it's short, nonresonant and of small effect. Otherw
In some instances being in the other elements' fields may not matter much, particularly if the feedline is taped to the boom and mast, and then goes to the bottom of the tower inside it. What I was w
stub, I think that was the result of our verbal barrage at the time. One thing is to claim certain performance (theoretical ?), another thing is to see the results and measure it. Even using current