are you supposed to just fit the power resistors in any way possible in the gap shown?
How does thickness of the antenna element effect it? I assume thicker = more bandwidth?
Looks like a copper pipe project. I happen to have a crappy pipe bender suited for bending copper pipe, I think I can make it out of 2 big segments without any junction pieces.
If I just went with it based on picture, I think a 1/2 inch pipe would work.
They look to be drawn off center. This is confusing to me.
Can you tune it with a ghetto sliding load maybe?
Can a thin version bent out of aluminum wire and some wooden zip tied on supports provide the termination placement? Or thinner refrigerator tubing. But I suspect the placement will change depending on dimensions?
How should the junction between the termination resistors and the antenna look like? I had in mind to use a copper fitting that is basically smashed shut to make a taper soldered to the resistor parallel bank.
And how should it be fed? Are those shown in the diagram as far apart for clarity or is there also some critical distance here? I am guessing if you use it with a low power gen there is no problem using a small non inductive resistor here ?
I don't think I need power to test a shield, just frequency, I don't think my style of shielding (i.e. high silver soldered electrical copper sheet/plate) will be effected too much by power level. Maybe a crappy plastic metalized box or something.
I am trying to think of how to test the spacing. I guess you can start in the middle, add a minimum distance copper-to-copper pipe fitting on one side, then slowly cut the other section away by say 1/4 inch at a time while monitoring on a VNA (reflection?) to get the proper spacing? Copper pipe is not really expensive.
Then on the other side you can add 1/4 inch to it by extending a nested pipe after the opposite side is cut off.
argghhh they dont tell you the top spacing either. So you have TWO unknowns to work out because you need to mess with both the resistor spacing and the damn Z axis spacing.
Any ideas? Is there some kind of program that can find the unknown from the picture if you give it length (it figures out exact prospective based on X and Y dimensions provided)?or maybe this one is more accurate to the dimensions, that one looks square and impossible to figure out with the error?