I am thinking about using ladderline for a folded dipole or for linear loading a wire antenna. I wonder if anyone has successfully modeled ladderline and, if so, what parameters they used for the ins
what program are you using to model it? If NEC, insulation models assume uniform thickness around the conductor, which is not representative of ladder line, so the "fine scale" details of the field i
In a folded dipole currents and voltages are essentially in parallel. No need to model it near resonance because the line is all common mode so the dielectric has little effect except for making the
Jim and Tom, many thanks for your replies. Let me tell you what I'm up to. I would like to put up an 80M EDZ between two towers. However, my towers are only 300' apart and I need about 340'. I have c
Joe, How about capacitive end loading for shortening your antenna? As far as I know, it's the most efficient type of loading. You could let the ends droop and attach basic spoke and perimeter wire ha
I'd try approximating it as a couple insulated wires with insulation thickness comparable to the average thickness and see where it gets you. Then, try changing the thickness a bit and see if it make
However, my considered folded dipole or would allow me to I'd just let the wires drop 20 feet at the ends or better yet make and end loading "T". Folding the ends back with ladder line wouldn't be m
antenna? As far as I perimeter wire hats. position on the Good idea. _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather St
Since I have (now had) a linear loaded 160m vertical I wanted to try to measure if that loading gave any loss. So here goes: Case: 100ft vertical with linear loading 26ft up and down, resonant at 189
Mark, I was considering that option also. Frankly, I thought the linear loading would be easier, but I didn't appreciate that the losses would be so high, especially with relatively short lengths. I'
While that small change demonstrates loss in linear loading, the effect is really bothersome when the antenna is very short. With a long antenna, like a 100ft tall 160 antenna, you can get away with